Lid member and sealed glass container

Abstract

This lid member is attached to a container having an opening and closes the opening, the lid member being provided with: a top wall section that closes the opening from one side in a first direction; an annular protruding part which protrudes from the top wall part to the other side in the first direction and is arranged inside the container; and a sealing part which has elasticity and seals the opening part, the protruding part is provided with an annular groove part which is recessed towards one side of the first direction, the groove part surrounds the central axis, and the sealing part is provided with an annular fixing part which is fixed on the inner surface of the groove part; and an annular tongue part which protrudes from the fixed part to the outside in the radial direction with the central axis as the center and seals the opening part, and the relationship 2.5 < = B * C / A < = 9.0 is satisfied, where A is the length of the tongue part in the radial direction, B is the thickness of the central part in the radial direction of the tongue part, and C is the hardness of the tongue part measured by a JIS K6253-3 A-type Durometer.

Description

Technical Field

[0001] Embodiments of the present invention relate to a cover component and a sealed glass container.

[0002] This application claims priority based on Japanese Patent Application No. 2024-076794, filed on May 9, 2024, the contents of which are incorporated herein by reference. Background Technology

[0003] The container with an openable and closable lid described below has been put into practical use. Specifically, an elastic annular sealing ring is bonded and fixed to the short cylindrical portion of the lid body. When the lid body is fitted into the container, the sealing ring is pressed against the inner circumferential surface of the container's opening, thereby sealing the interior of the container. For example, Patent Document 1 discloses a container with an openable and closable lid in which the sealing ring is bonded and fixed to the outer circumferential surface of the short cylindrical portion.

[0004] Patent Document 1: Japanese Patent Application Publication No. 2012-144276

[0005] In containers with opening and closing lids of the aforementioned structure, the sealing ring is only bonded and fixed to the outer circumferential surface of the short cylindrical section, making it difficult to increase the bonding area between the sealing ring and the lid body. Therefore, during use, if the lid body is repeatedly attached and detached, the sealing ring can easily peel off. Consequently, it is difficult to improve the durability of the sealed glass container. Furthermore, if the sealing ring peels off, food or other contents may enter between the sealing ring and the lid body, potentially reducing the hygiene of the container. Summary of the Invention

[0006] The present invention was made in view of this situation, and its object is to provide a lid component and a sealed glass container that can improve durability.

[0007] The present invention has the following aspects.

[0008] [1] A cover member, installed on a container having an opening on one side in a first direction, sealing the opening, wherein,

[0009] The aforementioned cover component includes:

[0010] The top wall portion blocks the opening from one side of the first direction mentioned above;

[0011] An annular protrusion, protruding from the aforementioned top wall portion towards the other side in the first direction, is disposed inside the aforementioned container; and

[0012] The sealing part is elastic and seals the opening.

[0013] The aforementioned protrusion is provided with an annular groove recessed to one side in the first direction.

[0014] The aforementioned groove will be surrounded by a central axis extending in a direction parallel to the first direction.

[0015] The above-mentioned sealing part has:

[0016] An annular fixing part is fixed to the inner surface of the groove; and

[0017] The annular tongue portion protrudes radially outward from the aforementioned fixing portion, centered on the aforementioned central axis, thereby sealing the aforementioned opening.

[0018] When the radial length of the aforementioned tongue portion is set as A, the thickness of the radial center portion of the aforementioned tongue portion is set as B, and the hardness of the aforementioned tongue portion measured by a JIS K6253-3 Type A Duro hardness tester is set as C, the following relationship is satisfied:

[0019] 2.5≦B×C / A≦9.0.

[0020] That is, because the cap component of the present invention can increase the bonding area between the fixing part and the protrusion, the bonding strength between the sealing part and the cap body can be improved. Therefore, when using a sealed glass container, even if the cap component is repeatedly attached and detached from the container, the sealing part can be prevented from peeling off from the cap body. Therefore, the durability of the cap component and the durability of the sealed glass container can be improved.

[0021] [2] In the cover component described in [1],

[0022] The aforementioned fixing part is fixed to the inner surface of the aforementioned groove as a whole.

[0023] [3] In the cover component described in [1] or [2],

[0024] The dimension of the fixing part in the first direction is greater than the dimension of the fixing part in the radial direction.

[0025] [4] Of the cover components described in any of [1] to [3],

[0026] The aforementioned protrusion has:

[0027] The inner wall portion, which is the portion that is radially inner than the aforementioned groove portion; and

[0028] The outer wall portion is the part that is radially outer than the aforementioned groove portion.

[0029] The end of the outer side wall portion on the other side of the first direction is located on the side of the first direction that is closer to the end of the inner side wall portion on the other side of the first direction.

[0030] [5] In the cover component described in [4],

[0031] The tongue portion has an outer fixing portion fixed to the outer side wall portion facing the radially outer side.

[0032] [6] Of the cover components described in any of [1] to [5],

[0033] The tongue portion has a curved shape that is positioned on one side of the first direction as it moves outward toward the radial direction.

[0034] [7] In the cover component described in [6],

[0035] The direction in which the tongue portion protrudes from the fixing portion is an angle of 45° or more and 80° or less relative to the first direction.

[0036] [8] Of the cover components described in any of [1] to [7],

[0037] When viewed circumferentially from the aforementioned central axis, the end of the aforementioned tongue portion has a curved shape that protrudes outward in the aforementioned radial direction.

[0038] [9] Of the cover components described in any of [1] to [8],

[0039] The aforementioned tongue portion has a first tongue portion and a second tongue portion that are circumferentially connected to each other about the aforementioned central axis.

[0040] The ratio of the circumferential dimension of the first tongue portion to the circumferential dimension of the tongue portion is 10% or more and 50% or less.

[0041] The rigidity of the first tongue portion in the first direction is less than the rigidity of the second tongue portion in the first direction.

[0042]

[10] In the cover component described in [9],

[0043] The ratio of the average thickness of the radial center portion of the first tongue portion in the circumferential direction to the average thickness of the radial center portion of the second tongue portion in the circumferential direction is 50% or more and 95% or less.

[0044]

[11] Of the cover components described in any of [1] to [8],

[0045] The aforementioned tongue portion has a first tongue portion and a second tongue portion that are circumferentially connected to each other about the aforementioned central axis.

[0046] The radial outer edge of the first tongue portion is located on the radial inner side compared to the radial outer edge of the second tongue portion.

[0047]

[12] Of the cover components described in any of [1] to [8],

[0048] The aforementioned opening is cylindrical with the aforementioned central axis as its center.

[0049] The aforementioned tongue portion has a first tongue portion and a second tongue portion that are circumferentially connected to each other about the aforementioned central axis.

[0050] The ratio of the circumferential dimension of the first tongue portion to the circumferential dimension of the tongue portion is 10% or more and 50% or less.

[0051] The radial inner edge of the first tongue portion is located closer to the central axis than the radial inner edge of the second tongue portion.

[0052] The radial length of the first tongue portion is longer than the radial length of the second tongue portion.

[0053]

[13] Of the cover components described in any of [1] to

[12] ,

[0054] The aforementioned sealing part is made of silicone rubber.

[0055]

[14] A sealed glass container, wherein,

[0056] have:

[0057] The cover component described in any of [1] to

[13] ; and

[0058] A glass container having the aforementioned opening.

[0059]

[15] A sealed glass container, wherein,

[0060] have:

[0061] [1] The cover component described; and

[0062] A glass container having the aforementioned opening.

[0063] When water with a volume of 10% of the container's volume is added to the container and boiled, and then the container's internal pressure is reduced by cooling the container with water at a temperature of 25°C or lower while the lid is installed, at least a portion of the tongue portion elastically deforms to the other side of the first direction, thereby releasing the tongue portion from the sealing state of the opening and suppressing damage to the container.

[0064] According to the present invention, it is possible to provide a lid component and a sealed glass container that can improve durability. Attached Figure Description

[0065] Figure 1 This is a perspective view showing an example of a sealed glass container according to the first embodiment of the present invention.

[0066] Figure 2 This is a first cross-sectional view showing an example of a sealed glass container according to the first embodiment of the present invention.

[0067] Figure 3 This is a cross-sectional view showing an example of the cover component according to the first embodiment of the present invention.

[0068] Figure 4 This is a first cross-sectional view showing a portion of an example of a cover component according to a first embodiment of the present invention.

[0069] Figure 5 This is a second cross-sectional view showing an example of a sealed glass container according to the first embodiment of the present invention.

[0070] Figure 6 This is a top view of an example of a cover member according to the second embodiment of the present invention, viewed from the other side in the first direction.

[0071] Figure 7 This is a cross-sectional view showing an example of the cover component according to the third embodiment of the present invention.

[0072] Figure 8 This is a top view of an example of the cover member according to the third embodiment of the present invention, viewed from the other side in the first direction.

[0073] Figure 9 This is a cross-sectional view showing an example of a modified cover component according to the third embodiment of the present invention.

[0074] Figure 10 This is a top view of an example of a cover member of a modified embodiment of the present invention, viewed from the other side in the first direction.

[0075] Figure 11 This is a cross-sectional view showing an example of the cover component according to the fourth embodiment of the present invention.

[0076] Figure 12 This is a top view of an example of the cover member according to the fourth embodiment of the present invention, viewed from the other side in the first direction.

[0077] Figure 13 This is a cross-sectional view showing an example of a cover component of a modified embodiment of the fourth embodiment of the present invention.

[0078] Figure 14This is a top view of an example of a cover member of a modified embodiment of the fourth embodiment of the present invention, viewed from the other side in the first direction. Detailed Implementation

[0079] The sealed glass container of the present invention is a sealed container that can be used to seal and preserve the contents contained inside the container in a manner that allows for the removal or placement of the contents. The contents can be cooked food, flour-based foods such as wheat flour, or other non-food items such as semiconductor wafers. Hereinafter, an example of the sealed glass container of the present invention will be described with reference to the accompanying drawings. Furthermore, the dimensions and other dimensions illustrated in the following description are merely examples, and the present invention is not necessarily limited to these; appropriate modifications can be made without altering its spirit and scope.

[0080] In the figures, the first direction D1, indicated by arrow D1, is the direction in which the central axis J extends. The central axis J extends in a direction parallel to the first direction D1. The central axis J is a virtual axis. In this embodiment, the first direction D1 is the vertical direction of the sealed glass container. In the following description, the side in which the arrow of the first direction D1 points (+D1 side) is referred to as "one side of the first direction D1" or "upper side," and the side opposite to the side in which the arrow of the first direction D1 points (-D1 side) is referred to as "the other side of the first direction D1" or "lower side." In the following description, the radial direction centered on the central axis J is simply referred to as "radial." The circumferential direction centered on the central axis J is simply referred to as "circumferential direction." The circumferential direction is appropriately indicated by arrow θ in the figures.

[0081] <First Embodiment>

[0082] Hereinafter, the sealed glass container 10 according to the first embodiment will be described with reference to the accompanying drawings.

[0083] Figure 1The sealed glass container 10 of this embodiment, as shown, seals and preserves the contents contained within it. The sealed glass container 10 includes a container 11, a lid member 20, and a sealing valve 40. In this embodiment, the container 11 is generally cylindrical about a central axis J. In the following description, the shape of the container 11 in this embodiment will sometimes be referred to as circular. The container 11 may also be other shapes, such as a square cylinder about a central axis J. In this embodiment, the container 11 is made of glass. The container 11 may also be made of other materials such as resin, ceramic, or metal. In this embodiment, because the container 11 is made of glass, the visibility of the contents can be improved by visually confirming them from the outside of the sealed glass container 10, and when the contents are food, the transfer of odors from the contents to the container 11 and the adhesion of dirt to the container 11 can be suppressed. Furthermore, when the container 11 is made of heat-resistant glass, the food contained inside the container 11 can be heated using a microwave oven or similar device. Therefore, considering these advantages, the container 11 is preferably made of glass. The container 11 has a peripheral wall portion 12 and a bottom wall portion 13.

[0084] The peripheral wall portion 12 is roughly cylindrical with the central axis J as its center. For example... Figure 2 As shown, the peripheral wall portion 12 houses the lower portion of the cover member 20 internally. The peripheral wall portion 12 has an opening 11a. That is, the container 11 has an opening 11a. The opening 11a is the upper portion of the peripheral wall portion 12. The opening 11a is the portion of the peripheral wall portion 12 that overlaps with the cover member 20 when viewed radially. The upper end of the opening 11a is the upper end of the container 11. The opening 11a opens upward, i.e., to one side (+D1 side) in the first direction D1. The opening 11a surrounds the central axis J. In this embodiment, the opening 11a is cylindrical with the central axis J as its center. In this embodiment, when viewed from the first direction D1, the opening 11a has a generally annular shape with the central axis J as its center. In addition, when viewed from the first direction D1, the inner peripheral surface of the opening 11a is circular with the central axis J as its center.

[0085] The bottom wall portion 13 is plate-shaped and extends in a direction orthogonal to the first direction D1. In this embodiment, when viewed from the first direction D1, the bottom wall portion 13 is approximately circular about the central axis J. The radial outer edge of the bottom wall portion 13 is connected to the lower end of the peripheral wall portion 12.

[0086] The lid component 20 is detachably mounted on the container 11 to seal the opening 11a. Thus, the sealed glass container 10 can effectively preserve the contents contained within it. The lid component 20 is mounted on the upper end of the container 11. The lid component 20 seals the opening 11a from above. The lid component 20 includes a lid body portion 21 and a sealing portion 30. Furthermore, in the following description, the shape of the lid component mounted on the circular container 11 is sometimes referred to as circular.

[0087] In this embodiment, the cover body 21 is made of resin. More specifically, the cover body 21 is made of polybutylene terephthalate (PBT). The material constituting the cover body 21 can be a resin material other than polybutylene terephthalate, or a material other than resin, such as a metal material. The cover body 21 has a top wall portion 22 and a protrusion 23. That is, the cover component 20 has a top wall portion 22 and a protrusion 23.

[0088] The top wall portion 22 is plate-shaped, extending in a direction orthogonal to the first direction D1. For example... Figure 1 As shown, in this embodiment, when viewed from the first direction D1, the top wall portion 22 is approximately circular with the central axis J as its center. Figure 2 As shown, the radially central portion of the top wall 22 is recessed downwards. The top wall 22 blocks the opening 11a from the upper side, i.e., the side of the first direction D1 (+D1 side). The top wall 22 is provided with an exhaust hole 22a, a wall thickness annular portion 22c, and a curved portion 22e.

[0089] The vent 22a is a hole that penetrates the top wall portion 22 in the first direction D1. When viewed from the first direction D1, the vent 22a is approximately circular about the central axis J. The wall thickness annular portion 22c is the edge portion of the vent 22a in the top wall portion 22. The dimension of the wall thickness annular portion 22c in the first direction D1 is larger than the dimension of the portion of the top wall portion 22 other than the wall thickness annular portion 22c in the first direction D1. The wall thickness annular portion 22c can improve the strength of the outer edge of the vent 22a in the top wall portion 22.

[0090] The curved portion 22e is the radial outer edge of the top wall portion 22. When viewed circumferentially, the curved portion 22e has an upwardly projecting arc shape. The curved portion 22e extends circumferentially. Inside the curved portion 22e, an opening 11a is inserted from the lower side. Thus, the top wall portion 22 seals the opening 11a.

[0091] like Figure 3 As shown, the protrusion 23 protrudes downwards from the top wall portion 22, i.e., on the other side (-D1 side) in the first direction D1. The protrusion 23 is annular in shape, surrounding the central axis J. In this embodiment, the protrusion 23 is annular with the central axis J as its center. The protrusion 23 may also be other shapes, such as a square annular shape surrounding the central axis J. Figure 2 As shown, the protrusion 23 is disposed inside the container 11. The protrusion 23 is radially opposed to the opening 11a. Figure 3 As shown, a groove 24 is provided in the protrusion 23. The protrusion 23 has an inner wall portion 25 and an outer wall portion 26.

[0092] The groove 24 is recessed from the downward-facing side of the protrusion 23 to the upward-facing side, i.e., the side in the first direction D1 (+D1 side). When viewed from the first direction D1, the groove 24 is an annular shape extending circumferentially. In this embodiment, when viewed from the first direction D1, the groove 24 is a generally circular annular shape centered on the central axis J. The groove 24 surrounds the central axis J. The groove 24 may also be other shapes, such as a square annular shape surrounding the central axis J.

[0093] The inner wall portion 25 is the radially inner portion of the protrusion 23 compared to the groove portion 24. In this embodiment, the inner wall portion 25 is annular about the central axis J. The radially outer surface of the inner wall portion 25 is part of the inner surface of the groove portion 24. The outer wall portion 26 is the radially outer portion of the protrusion 23 compared to the groove portion 24. In this embodiment, the outer wall portion 26 is annular about the central axis J. The radially inner surface of the outer wall portion 26 is part of the inner surface of the groove portion 24. The outer wall portion 26 surrounds the inner wall portion 25 radially outward. The lower end of the outer wall portion 26, i.e., the other side (-D1 side) of the first direction D1, is located above the lower end of the inner wall portion 25, i.e., on the side (+D1 side) of the first direction D1.

[0094] Figure 2 The sealing part 30 shown is fixed to the cover body 21. The sealing part 30 contacts the inner peripheral surface of the opening 11a. Thus, the cover part 20 seals the opening 11a. In this embodiment, the sealing part 30 is made of silicone rubber. The sealing part 30 is elastic. Furthermore, the sealing part 30 does not pose food hygiene problems and has suitable heat resistance. The material constituting the sealing part 30 can also be other elastic materials such as elastomers. In this embodiment, the sealing part 30 is formed by inserting the cover body 21 as an inserting member. Therefore, the sealing part 30 and the cover body 21 are bonded and fixed to each other. However, the forming method of the sealing part 30 is not limited to this embodiment; the sealing part 30 can also be formed as a separate component from the cover body 21 and fixed to the cover body 21 by adhesives or the like. Figure 3 As shown, the sealing part 30 has a fixing part 31 and a tongue part 33.

[0095] The fixing part 31 is annular, protruding in the first direction D1. The fixing part 31 is annular, surrounding the central axis J. In this embodiment, the fixing part 31 is annular with the central axis J as its center. The fixing part 31 may also be other shapes, such as a square annular shape surrounding the central axis J. The fixing part 31 is disposed inside the groove 24. The radially inward-facing surface of the fixing part 31 is bonded to the radially outward-facing surface of the inner wall 25. The radially outward-facing surface of the fixing part 31 is bonded to the radially inward-facing surface of the outer wall 26. Thus, the fixing part 31 is fixed to the inner surface of the groove 24. The two radially facing surfaces of the fixing part 31 are respectively fixed to the inner surface of the groove 24. In this embodiment, the fixing part 31 is integrally fixed to the downward-facing inner surface of the groove 24. Furthermore, the fixing part 31 is integrally fixed to both the radially inward-facing inner surface and the radially outward-facing inner surface of the groove 24. Therefore, in this embodiment, the fixing part 31 is fixed to the entire inner surface of the groove part 24. The lower end of the fixing part 31 is located below the lower end of the outer wall part 26. In this embodiment, the dimension of the fixing part 31 in the first direction D1 is greater than the radial dimension of the fixing part 31.

[0096] The tongue portion 33 protrudes radially outward from the lower end of the fixing portion 31, i.e., the end on the other side (-D1 side) of the first direction D1. That is, the tongue portion 33 protrudes radially outward from the fixing portion 31. The tongue portion 33 is annular in shape, surrounding the central axis J. In this embodiment, when viewed from the first direction D1, the tongue portion 33 is an annular shape that expands radially outward with the central axis J as the center. The tongue portion 33 may also be other shapes, such as a square annular shape surrounding the central axis J. Figure 4 As shown, the tongue portion 33 has a curved shape that is located on the upper side as it moves towards the radially outward, that is, on the side (+D1 side) of the first direction D1. Figure 4 The first virtual line L1 shown is a virtual line that is parallel to the first direction D1 and passes through the center of the fixing part 31. Figure 4 The second virtual line L2 shown is a virtual line passing through the radially outer end and upper end of the tongue portion 33, and the central portion of the first direction D1 of the portion of the fixing portion 31 that is lower than the outer wall portion 26. In this embodiment, the angle formed by the first virtual line L1 and the second virtual line L2 is the tongue portion angle α. The tongue portion angle α is the angle between the first direction D1 and the direction in which the tongue portion 33 protrudes. In this embodiment, the tongue portion angle α is 45° or more and 80° or less. That is, the direction in which the tongue portion 33 protrudes from the fixing portion 31 is an angle inclined relative to the first direction D1 at an angle of 45° or more and 80° or less.

[0097] The end 33a of the tongue portion 33 is the radially outer end of the tongue portion 33. When viewed circumferentially, the end 33a has a curved shape protruding radially outward. More specifically, when viewed circumferentially, the end 33a has a generally arcuate shape protruding radially outward. Figure 2 As shown, when the lid member 20 is installed onto the container 11, the end 33a contacts the inner circumferential surface of the opening 11a. More specifically, the end 33a contacts the inner circumferential surface of the opening 11a all around the circumference. Thus, the tongue portion 33 seals the opening 11a. That is, the lid member 20 seals the opening 11a. As described above, when viewed circumferentially, the end 33a has a curved shape protruding radially outward, thus enabling stable and seamless contact between the end 33a and the opening 11a all around the circumference. This improves the sealing performance of the tongue portion 33 over the opening 11a. Figure 4 As shown, the tongue portion 33 has an outer fixing portion 39.

[0098] The outer fixing portion 39 is the upwardly protruding part of the tongue portion 33. The outer fixing portion 39 is an annular shape extending circumferentially. The outer fixing portion 39 surrounds the lower part of the outer wall portion 26 radially outward. The inner circumferential surface of the outer fixing portion 39 is bonded and fixed to the radially outward surface of the outer wall portion 26. That is, the outer fixing portion 39 is fixed to the radially outward surface of the outer wall portion 26.

[0099] In this embodiment, the radial length A of the tongue portion 33 is the radial dimension of the portion of the tongue portion 33 that is radially outer of the outer wall portion 26. In this embodiment, the radial center portion of the tongue portion 33 is the portion of the tongue portion 33 that is radially inner from the end 33a by half the radial length A of the tongue portion 33. In this embodiment, the hardness C of the tongue portion 33 is measured by a JIS K6253-3 Type A Duro hardness tester. The hardness C of the tongue portion 33 can be measured, for example, by a hardness tester such as the ASKER Type A rubber hardness tester manufactured by Polymer Instruments Co., Ltd. In this embodiment, the radial length A of the tongue portion 33, the thickness B of the radial center portion of the tongue portion 33, and the hardness C of the tongue portion 33 satisfy the relationship 2.5 ≤ B × C / A ≤ 9.0. In the following description, the parameter of the tongue portion 33 calculated using B×C / A as described above will be referred to as the strength coefficient S of the tongue portion 33. The strength coefficient S of the tongue portion 33 is directly proportional to the thickness B and hardness C of the tongue portion 33, and inversely proportional to the radial length A of the tongue portion 33. Furthermore, in the following description, the radial length A of the tongue portion is sometimes simply referred to as "the length A of the tongue portion". The thickness B at the radial center of the tongue portion is sometimes simply referred to as "the thickness B of the tongue portion". Furthermore, the strength coefficient S of the tongue portion 33 is preferably 3.0 or more and 8.5 or less. More preferably, the strength coefficient S of the tongue portion 33 is 4.0 or more and 8.0 or less.

[0100] As described above, the strength coefficient S of the tongue portion 33 is directly proportional to both the thickness B and the hardness C of the tongue portion 33. Therefore, the strength coefficient S of the tongue portion 33 is positively correlated with the rigidity of the tongue portion 33 in the first direction D1. Thus, as the thickness B and hardness C of the tongue portion 33 increase, elastic deformation of the tongue portion 33 in the first direction D1 becomes more difficult. Conversely, as the thickness B and hardness C of the tongue portion 33 decrease, elastic deformation of the tongue portion 33 in the first direction D1 becomes easier.

[0101] As the radial length A of the tongue portion 33 increases, the area of ​​the tongue portion 33 facing the first direction D1 widens. Therefore, if... Figure 5 When a downward pressure Pa is applied to the tongue portion 33 as shown, the downward force applied to the tongue portion 33 increases. Furthermore, the longer the radial length A of the tongue portion 33, the greater the torque applied to the portion of the tongue portion 33 connected to the fixing portion 31 when a downward pressure Pa is applied to the tongue portion 33. Therefore, as the radial length A of the tongue portion 33 increases, elastic deformation of the tongue portion 33 in the first direction D1 becomes easier. Conversely, as the radial length A of the tongue portion 33 decreases, elastic deformation of the tongue portion 33 in the first direction D1 becomes more difficult.

[0102] As described above, the strength coefficient S of the tongue portion 33 is directly proportional to the thickness B and hardness of the tongue portion 33, and inversely proportional to the radial length A of the tongue portion 33. Therefore, as the strength coefficient S of the tongue portion 33 increases, elastic deformation of the tongue portion 33 in the first direction D1 becomes more difficult. Conversely, as the strength coefficient S of the tongue portion 33 decreases, elastic deformation of the tongue portion 33 in the first direction D1 becomes easier. In this embodiment, the strength coefficient S of the tongue portion 33 is positively correlated with the difficulty of elastic deformation of the tongue portion 33 in the first direction D1.

[0103] Therefore, when Figure 1 When the cover component 20 shown is installed into the container 11, even if... Figure 5 As shown, when a downward pressure Pa is applied to the tongue portion 33, even if the strength coefficient S of the tongue portion 33 is too large, the tongue portion 33 will not elastically deform downwards, but will instead... Figure 1 As shown, the tongue portion 33 is kept in an upwardly curved state to maintain contact with the opening portion 11a. Therefore, even when a downward pressure Pa is applied to the tongue portion 33, the opening portion 11a is maintained closed by the tongue portion 33. That is, the sealing portion 30 maintains a closed state with respect to the container 11.

[0104] Conversely, if the strength coefficient S of the tongue portion 33 is small, and a downward pressure Pa is applied to the tongue portion 33, then as follows: Figure 5 As shown, at least a portion of the tongue portion 33 undergoes elastic deformation towards the downward side. At this time, the portion of the tongue portion 33 that has undergone elastic deformation towards the downward side contacts the opening 11a in a bent-down state. Therefore, the relevant portion of the tongue portion 33 is difficult to maintain stable contact with the opening 11a, and the contact pressure between the relevant portion of the tongue portion 33 and the opening 11a decreases. Consequently, the sealing state of the tongue portion 33 on the opening 11a is released. That is, the sealing state of the sealing portion 30 on the container 11 is released.

[0105] In this embodiment, for example, when the air pressure outside the container 11 is greater than the air pressure inside the container 11, a downward pressure Pa is applied to the tongue portion 33. In this embodiment, for example, when water with a volume of 10% of the container 11's volume is added to the container 11 and boiled, and then, with the lid member 20 installed in the container 11, water at a temperature of 25°C or lower (preferably running water) is applied to cool the inside of the container 11, and the air pressure inside the container 11 is reduced, a downward pressure Pa1 is applied to the tongue portion 33 due to the pressure difference between the outside and inside of the container 11. In this embodiment, when a downward pressure Pa1 is applied to the tongue portion 33, at least a portion of the tongue portion 33 elastically deforms downward, thus reducing the contact pressure between at least a portion of the tongue portion 33 and the opening 11a. As a result, since the sealing state of the sealing portion 30 over the opening 11a is released, air from outside the container 11 flows into the interior of the container 11. Therefore, the pressure difference between the outside of container 11 and the inside of container 11 can be reduced. Thus, for example, in the event of defects such as damage to a part of container 11, breakage of container 11 can be prevented.

[0106] like Figure 2 As shown, the sealing valve 40 passes through the vent 22a of the cover body 21 in the first direction D1. In this embodiment, the sealing valve 40 is made of silicone rubber. The sealing valve 40 has an integral body 41, a pinching part 42, and an anti-detachment piece 43.

[0107] The main body 41 is approximately cylindrical in shape, extending along a first direction D1 with the central axis J as the center. An exhaust port 22a passes through the main body 41 in the first direction D1. The outer diameter of the main body 41 is slightly larger than the inner diameter of the exhaust port 22a. The main body 41 fits into the exhaust port 22a. The main body 41 is movably supported on the inner surface of the exhaust port 22a in the first direction D1. A recess 41a is provided in the main body 41 that is recessed radially inward.

[0108] Viewed radially, the recess 41a is approximately rectangular with its long side extending along the first direction D1. The radially outward-facing surface of the recess 41a is located radially inward than the inner surface of the vent 22a. The recess 41a is provided on the lower portion of the main body 41. Although not shown in the figure, in this embodiment, a plurality of recesses 41a are provided on the main body 41. The recesses 41a are spaced apart from each other circumferentially. The positions of the recesses 41a in the first direction D1 are the same for each other. If the user of the sealed glass container 10 pushes the sealing valve 40 downward relative to the cover member 20, so that each recess 41a is located below the vent 22a, the vent 22a can be sealed by the main body 41. Thus, the user can seal the interior of the container 11. Furthermore, if the user pushes the sealing valve 40 upward relative to the cover member 20 so that the inner surfaces of each recess 41a and the vent 22a are aligned, air from outside the container 11 can be supplied to the interior of the container 11 through the space between each recess 41a and the vent 22a. As a result, since the air pressure inside the container 11 is the same as the air pressure outside the container 11, the cover member 20 can be easily removed from the container 11.

[0109] like Figure 1 As shown, the pinching part 42 is a roughly circular shape that protrudes radially outward from the upper end of the main body part 41. Figure 2 As shown, the outer diameter of the gripping part 42 is larger than the inner diameter of the vent hole 22a. Therefore, when the user pushes the sealing valve 40 down, it prevents the sealing valve 40 from falling into the container 11. Furthermore, the user can easily move the sealing valve 40 upwards by applying an upward force to the gripping part 42. This allows air from outside the container 11 to be supplied to the interior of the container 11 through the space between each recess 41a and the vent hole 22a, as described above. Therefore, the cap part 20 can be easily removed from the container 11.

[0110] The anti-detachment plate 43 protrudes downward from the lower end of the main body 41. The outer diameter of the anti-detachment plate 43 is larger than the inner diameter of the vent hole 22a. Therefore, when the user moves the sealing valve 40 upward relative to the cover member 20, the sealing valve 40 can be prevented from detaching from the vent hole 22a.

[0111] According to this embodiment, the cover member 20 includes: a top wall portion 22 that blocks the opening 11a from the upper side, i.e., one side (+D1 side) in the first direction D1; an annular protrusion 23 that protrudes from the top wall portion 22 to the lower side, i.e., the other side (-D1 side) in the first direction D1, and is disposed inside the container 11; and a sealing portion 30 that is elastic and seals the opening 11a. An annular groove 24 that is recessed upwards is provided in the protrusion 23, and the groove 24 surrounds a central axis J extending in a direction parallel to the first direction D1. The sealing portion 30 includes: an annular fixing portion 31 that is fixed to the inner surface of the groove 24; and an annular tongue portion 33 that protrudes radially outward from the fixing portion 31 to seal the opening 11a. Therefore, as described above, the two radially facing surfaces of the fixing portion 31 can be bonded and fixed to the inner surface of the groove 24 respectively. Therefore, compared to a structure where the fixing part 31 is disposed outside the groove 24 and only one radially facing surface of the fixing part 31 is fixed to the outer surface of the protrusion 23, the bonding area between the fixing part 31 and the protrusion 23 can be increased. This improves the bonding strength between the sealing part 30 and the lid body 21. Therefore, when using the sealed glass container 10, even with repeated loading and unloading of the lid component 20 relative to the container 11, the sealing part 30 can be prevented from peeling off from the lid body 21. This improves the durability of both the lid component 20 and the sealed glass container 10. Furthermore, since the sealing part 30 can be prevented from peeling off from the lid body 21, the contents contained inside the container 11 can be prevented from entering between the sealing part 30 and the lid body 21. Therefore, the hygienic properties of the sealed glass container 10 can be prevented from decreasing.

[0112] According to this embodiment, when the radial length of the tongue portion 33 is set as A, the thickness of the radial center portion of the tongue portion 33 is set as B, and the hardness of the tongue portion measured by the A-type Duroy hardness tester of JIS K6253-3 is set as C, the cover component 20 satisfies the relationship 2.5≦B×C / A≦9.0.

[0113] When the strength coefficient S of the tongue portion 33 is less than 2.5, the strength of the tongue portion 33 in the first direction D1 is too small, making it difficult to maintain stable contact between the tongue portion 33 and the opening portion 11a, resulting in insufficient contact pressure. Therefore, it is difficult to stably seal the opening portion 11a through the sealing portion 30, making it difficult to improve the airtightness of the sealed glass container 10.

[0114] When the strength coefficient S of the tongue portion 33 is greater than 9.0, even if a downward pressure Pa is applied to the tongue portion 33, it is difficult for the tongue portion 33 to elastically deform downwards. Therefore, even if the air pressure inside the container 11 is reduced, thereby increasing the pressure difference between the outside and inside of the container 11, the tongue portion 33 is still difficult to elastically deform downwards. As a result, the sealed state of the sealed glass container 10 is maintained, and the container 11 may break due to the pressure difference between the outside and inside of the container 11.

[0115] In response to the above situation, in this embodiment, since the strength coefficient S of the tongue portion 33 is 2.5 or higher, the strength of the tongue portion 33 in the first direction D1 can be prevented from becoming too small. Therefore, the contact pressure between the tongue portion 33 and the opening 11a can be appropriately increased. Therefore, the opening 11a can be stably sealed by the sealing portion 30, thus improving the airtightness of the sealed glass container 10. In addition, in this embodiment, since the strength coefficient S of the tongue portion 33 is 9.0 or lower, if a downward pressure Pa is applied to the tongue portion 33, the tongue portion 33 is prone to elastic deformation downward. Therefore, the tongue portion 33 is prone to elastic deformation downward due to the pressure difference between the air pressure outside the container 11 and the air pressure inside the container 11. As a result, as described above, since the sealing state of the opening 11a by the tongue portion 33 can be released, the pressure difference between the air pressure outside the container 11 and the air pressure inside the container 11 can be reduced. Therefore, it is possible to prevent the container 11 from breaking due to the pressure difference between the outside and inside of the container 11.

[0116] According to this embodiment, the fixing part 31 is fixed to the entire inner surface of the groove 24. Therefore, the bonding area between the fixing part 31 and the protrusion 23 can be increased more appropriately. As a result, the bonding strength between the sealing part 30 and the lid body 21 can be increased more appropriately. Therefore, when using the sealed glass container 10, the sealing part 30 can be more appropriately prevented from peeling off from the lid body 21. Therefore, the durability of the lid component 20 and the sealed glass container 10 can be more appropriately improved. In addition, since the entry of contents between the sealing part 30 and the lid body 21 can be more appropriately prevented, the reduction of hygiene of the sealed glass container 10 can be more appropriately prevented.

[0117] According to this embodiment, the dimension of the fixing portion 31 in the first direction D1 is larger than the radial dimension of the fixing portion 31. Therefore, it is easier to more appropriately increase the bonding area between the fixing portion 31 and the inner surface of the groove portion 24. As a result, the bonding strength between the sealing portion 30 and the cover body portion 21 can be more appropriately improved. Therefore, the durability of the cover component 20 and the durability of the sealed glass container 10 can be more appropriately improved, and the reduction of the hygiene of the sealed glass container 10 can be more appropriately suppressed.

[0118] According to this embodiment, the protrusion 23 has: an inner wall portion 25, which is radially inner than the groove portion 24; and an outer wall portion 26, which is radially outer than the groove portion 24. The lower end of the outer wall portion 26, i.e., the other side (-D1 side) of the first direction D1, is located above the lower end of the inner wall portion 25, i.e., on the side (+D1 side) of the first direction D1. Therefore, it is easy to prevent the elastic deformation of the tongue portion 33 in the first direction D1 from being hindered by the outer wall portion 26. Therefore, it is easy to increase the range of motion of the tongue portion 33 in the first direction D1. Therefore, when the cover member 20 is installed on the container 11, if the end 33a of the tongue portion 33 contacts the inner peripheral surface of the opening portion 11a, the tongue portion 33 can easily bend elastically upwards. Therefore, when the lid part 20 is installed on the container 11, it is easy to suppress the increase of friction between the tongue part 33 and the opening part 11a, so the lid part 20 can be easily installed on the container 11.

[0119] According to this embodiment, the tongue portion 33 has an outer fixing portion 39 fixed to the radially outward surface of the outer wall portion 26. Therefore, it is possible to prevent contents from entering between the sealing portion 30 and the radially outward surface of the outer wall portion 26, thus more appropriately suppressing the reduction of hygiene of the sealed glass container 10.

[0120] Furthermore, in this embodiment, as described above, since the outer fixing portion 39 is bonded to the radially outward surface of the outer wall portion 26, the bonding area between the sealing portion 30 and the protrusion 23 can be more appropriately increased. This allows for a more appropriate increase in the bonding strength between the sealing portion 30 and the cap body portion 21. Consequently, the durability of the cap component 20 and the sealed glass container 10 can be more appropriately improved, and the reduction in the hygiene of the sealed glass container 10 can be more appropriately suppressed.

[0121] According to this embodiment, the tongue portion 33 has a curved shape that is positioned on the upper side (+D1 side) in the first direction D1 as it moves radially outward. Therefore, when the lid member 20 is installed on the container 11, if the end 33a of the tongue portion 33 contacts the inner peripheral surface of the opening 11a, the tongue portion 33 is more likely to bend upward. Therefore, when the lid member 20 is installed on the container 11, it is easier to more appropriately suppress the increase of friction between the tongue portion 33 and the opening 11a, so that the lid member 20 can be installed on the container 11 more easily.

[0122] According to this embodiment, the direction in which the tongue portion 33 protrudes from the fixing portion 31 is an angle of 45° or more and 80° or less relative to the first direction D1. That is, the angle between the first direction D1 and the direction in which the tongue portion 33 protrudes, i.e., the tongue portion angle α, is 45° or more and 80° or less.

[0123] When the angle α of the tongue portion is less than 45°, due to the excessive rigidity of the tongue portion 33 in the first direction D1, it is difficult for the tongue portion 33 to elastically deform downward by applying a pressure Pa downward. Therefore, even if the pressure difference between the outside and inside of the container 11 increases, the tongue portion 33 still cannot elastically deform downward, and the container 11 may break due to the pressure difference between the outside and inside of the container 11.

[0124] When the angle α of the tongue portion is greater than 80°, the tongue portion 33 is difficult to elastically deform upward when the lid component 20 is installed on the container 11. Therefore, when the lid component 20 is installed on the container 11, the friction between the tongue portion 33 and the opening portion 11a tends to increase, making it difficult to install the lid component 20 on the container 11.

[0125] In contrast, in this embodiment, since the angle α of the tongue portion is 45° or more, it is possible to prevent the rigidity of the tongue portion 33 in the first direction D1 from becoming excessive. Therefore, the tongue portion 33 can more easily and appropriately deform elastically downwards by applying a pressure Pa to the downward side. Thus, it is possible to more appropriately prevent the container 11 from breaking due to the pressure difference between the outside and inside of the container 11. Furthermore, in this embodiment, since the angle α of the tongue portion is 80° or less, when the lid member 20 is installed on the container 11, the tongue portion 33 can more easily deform elastically upwards. Therefore, when the lid member 20 is installed on the container 11, it is possible to more appropriately suppress the increase in friction between the tongue portion 33 and the opening 11a, making it easier to install the lid member 20 on the container 11.

[0126] Furthermore, the angle α of the tongue portion is preferably 55° or more, and more preferably 65° or more. This allows for more appropriate suppression of excessive rigidity in the first direction D1 of the tongue portion 33, making it easier for the tongue portion 33 to elastically deform downwards by applying a pressure Pa downwards. Additionally, the angle α of the tongue portion is more preferably 75° or less. This makes it easier to install the lid member 20 onto the container 11, as the tongue portion 33 can more easily elastically deform upwards.

[0127] According to this embodiment, when viewed circumferentially, the end 33a of the tongue portion 33 has a curved shape that protrudes radially outward. Therefore, compared to a structure where a corner is provided at the end 33a of the tongue portion 33, it is possible to suppress the end 33a of the tongue portion 33 from hooking onto the inner circumferential surface of the opening portion 11a when the lid member 20 is installed on the container 11. As a result, it is easier and more suitable to suppress the increase in friction between the tongue portion 33 and the opening portion 11a when the lid member 20 is installed on the container 11, so it is easier to install the lid member 20 on the container 11.

[0128] According to this embodiment, the sealing part 30 is made of silicone rubber. Therefore, as described above, problems with food hygiene related to the sealing part 30 can be suppressed, and its heat resistance can be appropriately improved. Thus, the convenience of sealing the glass container 10 can be improved.

[0129] According to this embodiment, the sealed glass container 10 includes a lid member 20 and a glass container 11 with an opening 11a. Therefore, as described above, the visibility of the contents can be improved by visually confirming them from the outside of the sealed glass container 10, and when the contents of the sealed glass container 10 are food, the transfer of odors from the contents to the container 11 and the adhesion of dirt to the container 11 can be suppressed. Furthermore, when the container 11 is made of heat-resistant glass, the food inside the container 11 can be heated using a microwave oven or the like. This further enhances the convenience of the sealed glass container 10.

[0130] According to this embodiment, the sealed glass container 10 includes a lid member 20 and a glass container 11 with an opening 11a. As described above, water with a volume of 10% of the volume of the container 11 is placed inside the container 11 and the water is boiled. Then, with the lid member 20 installed in the container 11, water at a temperature of 25°C or lower is applied to cool the inside of the container 11. When the air pressure inside the container 11 is reduced, at least a portion of the tongue portion 33 elastically deforms downward, i.e., on the other side of the first direction D1 (-D1 side), thereby releasing the sealing state of the tongue portion 33 on the opening 11a and suppressing the breakage of the container 11.

[0131] <Second Implementation>

[0132] Figure 6 This is a top view taken from the side opposite to the first direction D1 (-D1 side) of an example of the lid member 120 provided in the sealed glass container 110 of the second embodiment. In the following description, the same reference numerals are used for the components that are the same as those in the first embodiment described above, and their descriptions are omitted. The lid member 120 of this embodiment includes a lid body portion 21 and a sealing portion 130.

[0133] The sealing portion 130 of this embodiment includes a fixing portion 31 and a tongue portion 133. In this embodiment, when viewed from the first direction D1, the tongue portion 133 is an annular shape that extends radially around the central axis J. Although not shown in the figure, the tongue portion 133 extends circumferentially and contacts the opening portion 11a. The tongue portion 133 has a first tongue portion 134 and a second tongue portion 135.

[0134] The first tongue portion 134 is a circumferential part of the tongue portion 133. When viewed from the first direction D1, the first tongue portion 134 is a part of an annular shape centered on the central axis J. The second tongue portion 135 is the part of the tongue portion 133 excluding the first tongue portion 134. When viewed from the first direction D1, the second tongue portion 135 is a part of an annular shape centered on the central axis J. The first tongue portion 134 and the second tongue portion 135 are connected to each other circumferentially. In this embodiment, the central angle β1 of the first tongue portion 134 is approximately 150°, and the central angle β2 of the second tongue portion 135 is approximately 210°. Therefore, the ratio of the circumferential dimension of the first tongue portion 134 to the circumferential dimension of the tongue portion 133, i.e., the first ratio R1, is 10% or more and 50% or less. Furthermore, the central angle β1 of the first tongue portion 134 and the central angle β2 of the second tongue portion 135 are not limited to the aforementioned angles.

[0135] Although the illustration is omitted, the average thickness B1ave of the radial center portion of the first tongue portion 134 is thinner than the thickness B2ave of the radial center portion of the second tongue portion 135. Therefore, the rigidity of the first tongue portion 134 in the first direction D1 is less than the rigidity of the second tongue portion 135 in the first direction D1. As described above, the strength coefficient S of the tongue portion 133 is positively correlated with the rigidity of the tongue portion 133 in the first direction D1. Therefore, the strength coefficient S1 of the first tongue portion 134 is less than the strength coefficient S2 of the second tongue portion 135. In this embodiment, the ratio of the average thickness B1ave of the radial center portion of the first tongue portion 134 in the circumferential direction to the average thickness B2ave of the radial center portion of the second tongue portion 135 in the circumferential direction, i.e., the second ratio R2, is 50% or more and 95% or less. Furthermore, in this embodiment, the average thickness of the tongue portion is the average value of the thickness measured every 18° along the circumferential direction. The interval for measuring the thickness of the tongue portion can be less than 18° or greater than 18°. The other structures of the sealing portion 130 in this embodiment are the same as those of the sealing portion 30 in the first embodiment described above. The other structures of the sealed glass container 110 in this embodiment are the same as those of the sealed glass container 10 in the first embodiment described above.

[0136] According to this embodiment, the tongue portion 133 has a first tongue portion 134 and a second tongue portion 135 connected to each other in the circumferential direction. The rigidity of the first tongue portion 134 in the first direction D1 is less than that of the second tongue portion 135 in the first direction D1. Therefore, as described above, the strength coefficient S1 of the first tongue portion 134 is less than the strength coefficient S2 of the second tongue portion 135. Therefore, compared with a structure having the same strength coefficient S1 in the first direction D1 of the first tongue portion 134 and the same strength coefficient S2 in the first direction D1 of the second tongue portion 135, when a downward pressure Pa is applied to the tongue portion 133, the first tongue portion 134, as part of the tongue portion 133, is more likely to elastically deform downward. As a result, the sealing state of the tongue portion 133 over the opening 11a can be easily released. Therefore, it is possible to more appropriately suppress the container 11 from breaking due to the pressure difference between the outside and inside of the container 11.

[0137] Furthermore, according to this embodiment, the first ratio R1, that is, the ratio of the circumferential dimension of the first tongue portion 134 to the circumferential dimension of the tongue portion 133, is 10% or more and 50% or less.

[0138] When the first ratio R1 is less than 10%, the circumferential dimension of the first tongue portion 134 is too small, so even if a downward pressure Pa is applied to the tongue portion 133, it is difficult for the first tongue portion 134 to elastically deform downward. As a result, the container 11 may break due to the pressure difference between the outside air pressure and the inside air pressure of the container 11.

[0139] When the first ratio R1 is greater than 50%, the circumferential dimension of the first tongue portion 134, which has low rigidity in the first direction D1, is too large, making it difficult to maintain stable contact between the tongue portion 133 and the opening portion 11a. As a result, it is difficult to stably seal the opening portion 11a by the sealing portion 130, making it difficult to improve the airtightness of the sealed glass container 110.

[0140] In contrast, in this embodiment, since the first ratio R1 is 10% or more, the circumferential dimension of the first tongue portion 134 can be prevented from becoming too small. Therefore, if a downward pressure Pa is applied to the tongue portion 133, the first tongue portion 134 is more likely to elastically deform downwards. Thus, damage to the container 11 due to the pressure difference between the outside and inside of the container 11 can be more appropriately prevented. Furthermore, in this embodiment, since the first ratio R1 is less than 50%, the circumferential dimension of the first tongue portion 134, which has low rigidity in the first direction D1, can be prevented from becoming too large. Therefore, the contact pressure between the tongue portion 133 and the opening 11a can be appropriately increased. Therefore, the opening 11a can be stably sealed by the sealing portion 130, thus appropriately improving the airtightness of the sealed glass container 110.

[0141] Furthermore, the first ratio R1 is preferably 20% or more, more preferably 30% or more. This allows for more appropriate suppression of the first tongue portion 134 from being too small in the circumferential direction, making it easier for the first tongue portion 134 to elastically deform downwards. Additionally, the first ratio R1 is preferably 45% or less, more preferably 40% or less. This allows for more appropriate suppression of the first tongue portion 134 from being too large in the circumferential direction. Therefore, the opening 11a can be more stably sealed by the sealing portion 130, thus improving the airtightness of the sealed glass container 110.

[0142] According to this embodiment, the second ratio R2, that is, the ratio of the average thickness B1ave of the radial center portion of the first tongue portion 134 in the circumferential direction to the average thickness B2ave of the radial center portion of the second tongue portion 135 in the circumferential direction, is 50% or more and 95% or less.

[0143] When the second ratio R2 is less than 50%, the strength of the first tongue portion 134 in the first direction D1 is too small, so the contact between the first tongue portion 134 and the opening portion 11a is difficult to stabilize. As a result, it is difficult to stably seal the opening portion 11a by the sealing portion 130, so it is difficult to improve the airtightness of the sealed glass container 110.

[0144] When the second ratio R2 is greater than 95%, since the difference between the strength coefficient S1 of the first tongue portion 134 and the strength coefficient S2 of the second tongue portion 135 is small, it is difficult for the first tongue portion 134 to elastically deform downwards even when a downward pressure Pa is applied to the tongue portion 133. As a result, the container 11 may break due to the pressure difference between the outside and inside of the container 11.

[0145] In contrast, in this embodiment, since the second ratio R2 is 50% or more, the strength of the first direction D1 of the first tongue portion 134 can be suppressed from being too small. Therefore, the contact pressure between the first tongue portion 134 and the opening 11a can be appropriately increased. Thus, the opening 11a can be sealed more stably by the sealing portion 130, thereby more appropriately improving the airtightness of the sealed glass container 110. Furthermore, in this embodiment, since the second ratio R2 is 95% or less, the strength coefficient S1 of the first tongue portion 134 can be appropriately reduced. Therefore, if a downward pressure Pa is applied to the tongue portion 133, the first tongue portion 134 is more likely to elastically deform downwards. Therefore, damage to the container 11 due to the pressure difference between the outside and inside of the container 11 can be more appropriately suppressed.

[0146] Furthermore, the second ratio R2 is preferably 60% or more, more preferably 65% ​​or more. This allows for more suitable suppression of excessively low strength in the first direction D1 of the first tongue portion 134, thus allowing for a more suitable increase in the contact pressure between the first tongue portion 134 and the opening 11a. Therefore, the airtightness of the sealed glass container 110 can be more appropriately improved. Additionally, the second ratio R2 is preferably 90% or less, more preferably 85% or less. This allows for a more suitable reduction in the strength coefficient S1 of the first tongue portion 134, making it easier for the first tongue portion 134 to elastically deform downwards.

[0147] Furthermore, in this embodiment, although the strength coefficient S1 of the first tongue portion 134 is made smaller than the strength coefficient S2 of the second tongue portion 135 by thinning the average thickness B1ave of the radial center portion of the first tongue portion 134, the strength coefficient S1 of the first tongue portion 134 can also be made smaller than the strength coefficient S2 of the second tongue portion 135 by making the hardness of the first tongue portion 134 smaller than the hardness of the second tongue portion 135. In this case, the difference between the hardness of the first tongue portion 134 and the hardness of the second tongue portion 135 is preferably in the range of 5° or more and 35° or less. Furthermore, the hardness of the first tongue portion 134 and the hardness of the second tongue portion 135 are measured by a Type A Duroy hardness tester of JIS K6253-3.

[0148] <Third Implementation>

[0149] Figure 7 This is a cross-sectional view showing an example of the cover member 220 of the third embodiment. Figure 8 This is a top view of an example of the cover member 220 according to the third embodiment, viewed from the side opposite to the first direction D1 (-D1 side). In the following description, the same reference numerals are used for components that are the same as those in the first embodiment described above, and their descriptions are omitted. Figure 7 As shown, the cover component 220 of this embodiment includes a cover body portion 221 and a sealing portion 230.

[0150] The main body 221 has a top wall portion 22 and a protrusion 223. The protrusion 223 is annular, surrounding the central axis J. Figure 8As shown, the protrusion 223 has a first protrusion 223a, a second protrusion 223b, a third protrusion 223c, and a fourth protrusion 223d. When viewed from the first direction D1, the first protrusion 223a has an arc shape centered on the central axis J. The central angle β2 of the first protrusion 223a is approximately 190°. When viewed from the first direction D1, the second protrusion 223b has a generally straight line extending radially inward from one circumferential end of the first protrusion 223a. When viewed from the first direction D1, the third protrusion 223c has a generally straight line extending radially inward from the other circumferential end of the first protrusion 223a. When viewed from the first direction D1, the fourth protrusion 223d has an arc shape centered on the central axis J. One circumferential end of the fourth protrusion 223d is connected to the radial inner edge of the second protrusion 223b. The other end of the fourth protrusion 223d in the circumferential direction is connected to the radial inner edge of the third protrusion 223c. The central angle β1 of the fourth protrusion 223d is approximately 170°. The diameter of the fourth protrusion 223d is smaller than the diameter of the first protrusion 223a. (Example) Figure 7 As shown, a groove 224 is provided in the protrusion 223. The protrusion 223 has an inner wall portion 225 and an outer wall portion 226.

[0151] The groove 224 is recessed upward from the downward-facing surface of the protrusion 223. The groove 224 is annular, surrounding the central axis J. Although not shown in the figure, when viewed from the first direction D1, the groove 224 extends along the radial center of the protrusion 223. The inner wall portion 225 is the portion of the protrusion 223 that is radially inner than the groove 224. The outer wall portion 226 is the portion of the protrusion 223 that is radially outer than the groove 224. Other structures of the cover member 220 in this embodiment are the same as those of the cover member 20 in the first embodiment described above.

[0152] The sealing part 230 has a fixing part 231 and a tongue part 233. The fixing part 231 is annular and protrudes in a first direction D1. The fixing part 231 is disposed inside the groove part 224. The fixing part 231 is fixed to the inner surface of the groove part 224 as a whole.

[0153] like Figure 8As shown, the tongue portion 233 has a first tongue portion 234 and a second tongue portion 235. When viewed from the first direction D1, the second tongue portion 235 is part of an annular shape centered on the central axis J. The second tongue portion 235 is a circumferential part of the tongue portion 233. The central angle β2 of the second tongue portion 235 is approximately 190°. When viewed from the first direction D1, the first tongue portion 234 is part of an annular shape centered on the central axis J. The first tongue portion 234 and the second tongue portion 235 are connected to each other circumferentially. The inner diameter of the first tongue portion 234 is smaller than the inner diameter of the second tongue portion 235. Therefore, the radial inner edge of the first tongue portion 234 is located closer to the central axis J than the radial inner edge of the second tongue portion 235. The outer diameter of the first tongue portion 234 is the same size as the outer diameter of the second tongue portion 235. Thus, as... Figure 7 As shown, the radial length A1 of the first tongue portion 234 is greater than the radial length A2 of the second tongue portion 235. As described above, the strength coefficient S of the tongue portion 233 is inversely proportional to the radial length A of the tongue portion 233. Therefore, the strength coefficient S1 of the first tongue portion 234 is less than the strength coefficient S2 of the second tongue portion 235. Therefore, in this embodiment, if a downward pressure Pa is applied to the tongue portion 233, the first tongue portion 234 is more likely to elastically deform downwards than the second tongue portion 235.

[0154] like Figure 8 As shown, the central angle β1 of the first tongue portion 234 is approximately 170°. As described above, the central angle β2 of the second tongue portion 235 is approximately 190°. Therefore, the ratio of the circumferential dimension of the first tongue portion 234 to the circumferential dimension of the tongue portion 233, i.e., the first ratio R1, is 10% or more and 50% or less. Furthermore, the central angles β1 of the first tongue portion 234 and β2 of the second tongue portion 235 are not limited to the aforementioned angles. Other structures of the sealing portion 230 in this embodiment are the same as those of the sealing portion 30 in the first embodiment described above. Other structures of the sealed glass container 210 in this embodiment are the same as those of the sealed glass container 10 in the first embodiment described above.

[0155] According to this embodiment, the tongue portion 233 has a first tongue portion 234 and a second tongue portion 235 connected to each other circumferentially about a central axis J. The radial inner edge of the first tongue portion 234 is located closer to the central axis J than the radial inner edge of the second tongue portion 235, and the radial length A1 of the first tongue portion 234 is greater than the radial length A2 of the second tongue portion 235. Therefore, as described above, the strength coefficient S1 of the first tongue portion 234 can be made smaller than the strength coefficient S2 of the second tongue portion 235. Therefore, compared with a structure where the strength coefficients S1 of the first tongue portion 234 and S2 of the second tongue portion 235 are the same, if a downward pressure Pa is applied to the tongue portion 233, the first tongue portion 234, as part of the tongue portion 233, is more likely to elastically deform downward. As a result, the sealing state of the tongue portion 233 over the opening 11a can be easily released. Therefore, it is possible to more effectively prevent container 11 from breaking due to the pressure difference between the outside and inside of container 11.

[0156] Furthermore, in this embodiment, the first ratio R1, i.e., the ratio of the circumferential dimension of the first tongue portion 234 to the circumferential dimension of the tongue portion 233, is 10% or more and 50% or less. Therefore, similar to the tongue portion 133 in the second embodiment described above, it is possible to prevent the circumferential dimension of the first tongue portion 234 from being too small, so the first tongue portion 234 can more easily undergo elastic deformation downwards. As a result, it is possible to easily release the sealing state of the tongue portion 233 on the opening 11a. Therefore, it is possible to more appropriately suppress the container 11 from breaking due to the pressure difference between the outside and inside of the container 11. In addition, it is possible to more appropriately increase the contact pressure between the tongue portion 233 and the opening 11a. Therefore, the opening 11a can be sealed more stably by the sealing portion 230, so the airtightness of the sealed glass container 210 can be more appropriately improved.

[0157] In this embodiment, the ratio of the radial length A1 of the first tongue portion 234 to the radial length A2 of the second tongue portion 235 is preferably 125% or more. This allows the strength coefficient S1 of the first tongue portion 234 to be appropriately smaller than the strength coefficient S2 of the second tongue portion 235. Therefore, if a downward pressure Pa is applied to the tongue portion 233, the first tongue portion 234 easily undergoes elastic deformation downwards. Furthermore, the ratio of the radial length A1 of the first tongue portion 234 to the radial length A2 of the second tongue portion 235 is preferably 240% or less. This appropriately suppresses the contact pressure between the first tongue portion 234 and the opening 11a from being too low. Therefore, it appropriately suppresses the reduction in the airtightness of the sealed glass container 210. Moreover, the ratio of the radial length A1 of the first tongue portion 234 to the radial length A2 of the second tongue portion 235 is more preferably 150% or more and 200% or less.

[0158] Furthermore, the structure of the protrusion 223 is not limited to this embodiment. For example, the protrusion 223 may also be configured such that the second protrusion 223b and the third protrusion 223c are not connected to each other, but the first protrusion 223a and the fourth protrusion 223d are directly connected. In this case, when viewed from the first direction D1, the fourth protrusion 223d preferably extends along its long axis. Figure 8 Extending vertically and along the short axis Figure 8 Elliptical or other curved surface shapes extending in the left and right directions.

[0159] <Modifications of the Third Embodiment>

[0160] Figure 9 This is a cross-sectional view showing one example of the cover component 320 in this modified example. Figure 10 This is a top view of one example of the cover member 320 in this modified example, viewed from the other side (-D1 side) in the first direction D1. In the following description, the same reference numerals are used for components that are identical to those in the third embodiment described above, and their descriptions are omitted. Figure 9 As shown, the sealed glass container 310 of this modified example includes a container 311, a cover component 320, and a sealing valve 40 (not shown).

[0161] In this modified example, the container 311 is a generally square cylindrical shape centered on the central axis J. In the following description, the shape of the container 311 in this modified example will sometimes be referred to as square. The container 311 is made of glass. The container 311 has a peripheral wall portion 312 and a bottom wall portion (not shown). The peripheral wall portion 312 is a generally square cylindrical shape centered on the central axis J. Although not shown in the figure, when viewed from the first direction D1, the peripheral wall portion 312 is a generally square annular shape. The container 311 has an opening portion 311a. The opening portion 311a is the upper part of the peripheral wall portion 312. When viewed radially, the opening portion 311a overlaps with the cover member 320. The opening portion 311a opens upwards. When viewed from the first direction D1, the bottom wall portion (not shown) is a generally square shape centered on the central axis J. The radial outer edge of the bottom wall portion is connected to the lower end of the peripheral wall portion 312. Other structures of the container 311 in this modified example are the same as those of the container 11 in the third embodiment described above.

[0162] The cover component 320 of this modified example includes a cover body portion 321 and a sealing portion 330. The cover body portion 321 has a top wall portion 322 and a protrusion 323. The top wall portion 322 is plate-shaped and extends in a direction orthogonal to the first direction D1. In this modified example, when viewed from the first direction D1, the top wall portion 322 is approximately square about the central axis J. Furthermore, in the following description, the shape of the cover component installed on the square container 311 is sometimes referred to as square. The top wall portion 322 is provided with a vent 22a, a wall thickness annular portion 22c, and a curved portion 322e. The curved portion 322e is the radial outer edge of the top wall portion 322. The curved portion 322e extends in a circle along the outer edge of the top wall portion 322. An opening 311a is inserted from below inside the curved portion 322e. Thus, the top wall portion 322 seals the opening 311a.

[0163] The protrusion 323 is in the shape of a ring surrounding the central axis J. For example... Figure 10 As shown, the protrusion 323 has a first protrusion 323a, a second protrusion 323b, a third protrusion 323c, and a fourth protrusion 323d. When viewed from the first direction D1, the first protrusion 323a extends in a straight line. The first protrusion 323a is located radially outward from the central axis J. When viewed from the first direction D1, the second protrusion 323b extends in a straight line from one end of the first protrusion 323a in a direction orthogonal to the direction in which the first protrusion 323a extends. When viewed from the first direction D1, the third protrusion 323c extends in a straight line from the other end of the first protrusion 323a in the same direction as the direction in which the second protrusion 323b extends. The third protrusion 323c is radially opposite the second protrusion 323b across the central axis J. When viewed from the first direction D1, the fourth protrusion 323d extends in a straight line along the same direction as the first protrusion 323a. One end of the fourth protrusion 323d is connected to the second protrusion 323b, and the other end is connected to the third protrusion 323c. The fourth protrusion 323d is radially opposite to the first protrusion 323a across the central axis J. The fourth protrusion 323d is located closer to the central axis J than the first protrusion 323a. Figure 9 As shown, a groove 324 is provided in the protrusion 323. The protrusion 323 has an inner wall portion 325 and an outer wall portion 326.

[0164] The groove 324 is recessed upward from the downward-facing surface of the protrusion 323. The groove 324 is annular, surrounding the central axis J. Although not shown in the figure, when viewed from the first direction D1, the groove 324 extends along the radial center of the protrusion 323. The inner wall portion 325 is the portion of the protrusion 323 that is radially inner than the groove 324. The outer wall portion 326 is the portion of the protrusion 323 that is radially outer than the groove 324. Other structures of the cover member 320 in this modified example are the same as those of the cover member 220 in the third embodiment described above.

[0165] In this modified example, the sealing portion 330 has a fixing portion 331 and a tongue portion 333. The fixing portion 331 is annular and protrudes in the first direction D1. The fixing portion 331 is disposed inside the groove portion 324. The fixing portion 331 is fixed to the inner surface of the groove portion 324 as a whole.

[0166] like Figure 10 As shown, when viewed from the first direction D1, the tongue portion 333 of this modified example is approximately square-shaped. The tongue portion 333 has a first tongue portion 334 and a second tongue portion 335.

[0167] The second tongue portion 335 is a circumferential part of the tongue portion 333. When viewed from the first direction D1, the second tongue portion 335 is approximately U-shaped. The first tongue portion 334 is another circumferential part of the tongue portion 333. The first tongue portion 334 is the portion of the tongue portion 333 excluding the second tongue portion 335. When viewed from the first direction D1, the first tongue portion 334 extends in a straight line. The first tongue portion 334 and the second tongue portion 335 are connected to each other circumferentially. The radial inner edge of the first tongue portion 334 is located closer to the central axis J than the radial inner edge of the second tongue portion 335. The distance between the radial outer edge of the first tongue portion 334 and the central axis J is the same length as the distance between the radial outer edge of the second tongue portion 335 and the central axis J. Thus, as Figure 9 As shown, the radial length A1 of the first tongue portion 334 is greater than the radial length A2 of the second tongue portion 335. Therefore, the strength coefficient S1 of the first tongue portion 334 is less than the strength coefficient S2 of the second tongue portion 335. Therefore, in this modified example, if a downward pressure Pa is applied to the tongue portion 333, the first tongue portion 334 is more likely to elastically deform downward than the second tongue portion 335.

[0168] According to this modified example, the tongue portion 333 has a first tongue portion 334 and a second tongue portion 335 connected to each other circumferentially about the central axis J. The radial inner edge of the first tongue portion 334 is located closer to the central axis J than the radial inner edge of the second tongue portion 335, and the radial length A1 of the first tongue portion 334 is greater than the radial length A2 of the second tongue portion 335. Therefore, as described above, the strength coefficient S1 of the first tongue portion 334 can be made smaller than the strength coefficient S2 of the second tongue portion 335. Therefore, compared with a structure having the same strength coefficient S1 of the first tongue portion 334 and the strength coefficient S2 of the second tongue portion 335, if a downward pressure Pa is applied to the tongue portion 233, the first tongue portion 334, as part of the tongue portion 233, is more likely to elastically deform downward. As a result, the sealing state of the tongue portion 333 over the opening 311a can be easily released. Therefore, it is possible to more effectively prevent container 311 from breaking due to the pressure difference between the outside and inside of container 311.

[0169] In this embodiment, the ratio of the radial length A1 of the first tongue portion 334 to the radial length A2 of the second tongue portion 335 is preferably 125% or more. This allows the strength coefficient S1 of the first tongue portion 334 to be appropriately smaller than the strength coefficient S2 of the second tongue portion 335. Therefore, when a downward pressure Pa is applied to the tongue portion 333, the first tongue portion 334 easily undergoes elastic deformation downwards. Furthermore, the ratio of the radial length A1 of the first tongue portion 334 to the radial length A2 of the second tongue portion 335 is preferably 240% or less. This appropriately suppresses the contact pressure between the first tongue portion 334 and the opening 11a from being too low. Therefore, it is appropriate to suppress the reduction of the airtightness of the sealed glass container 310.

[0170] <Fourth Implementation>

[0171] Figure 11 This is a cross-sectional view showing an example of the cover member 420 of the fourth embodiment. Figure 12 This is a top view of an example of the cover member 420 according to the fourth embodiment, viewed from the side opposite to the first direction D1 (-D1 side). In the following description, the same reference numerals are used for components that are the same as those in the first embodiment described above, and their descriptions are omitted. Figure 11 As shown, the cover component 420 of this embodiment includes a cover body portion 21 and a sealing portion 430.

[0172] The sealing portion 430 of this embodiment includes a fixing portion 31 and a tongue portion 433. The structure of the fixing portion 31 in this embodiment is the same as that of the fixing portion 31 in the first embodiment described above. Figure 12 As shown, the tongue portion 433 has a first tongue portion 434 and a second tongue portion 435.

[0173] When viewed from the first direction D1, the second tongue portion 435 is part of a circular shape centered on the central axis J. The second tongue portion 435 is a circumferential part of the tongue portion 433. The first tongue portion 434 is another circumferential part of the tongue portion 433. The first tongue portion 434 is the portion of the tongue portion 433 excluding the second tongue portion 435. The first tongue portion 434 and the second tongue portion 435 are connected to each other circumferentially. The outer diameter of the first tongue portion 434 decreases circumferentially as it extends from the connecting portion connected to the second tongue portion 435. Figure 11 As shown, the distance Rt1 between the radial outer edge of the first tongue portion 434 and the central axis J is less than the distance Rt2 between the radial outer edge of the second tongue portion 435 and the central axis J. Therefore, the radial outer edge of the first tongue portion 434 is located radially inward than the radial outer edge of the second tongue portion 435. Figure 12 As shown, in this embodiment, the central angle β1 of the first tongue portion 434 is approximately 150°, and the central angle β2 of the second tongue portion 435 is approximately 210°. Therefore, the ratio of the circumferential dimension of the first tongue portion 434 to the circumferential dimension of the tongue portion 433, i.e., the first ratio R1, is 10% or more and 50% or less. Furthermore, the central angle β1 of the first tongue portion 434 and the central angle β2 of the second tongue portion 435 are not limited to the aforementioned angles.

[0174] As described above, the radial outer edge of the first tongue portion 434 is located radially inward than the radial outer edge of the second tongue portion 435. Furthermore, as described above, when viewed from the first direction D1, the inner circumferential surface of the opening 11a is circular about the central axis J. Therefore, as... Figure 11As shown, the intrusion amount E1 of the first tongue portion 434 is less than the intrusion amount E2 of the second tongue portion 435. In this embodiment, the intrusion amount E is the radial dimension of the portion of the tongue portion 433 located radially outward from the inner circumferential surface of the opening 11a when the lid member 420 is removed from the container 11. In this embodiment, the intrusion amount E is the difference between the distance between the outer edge of the tongue portion 433 and the central axis J and the radius Rc of the inner circumferential surface of the opening 11a. That is, the intrusion amount E1 of the first tongue portion 434 is the difference between the distance Rt1 between the radial outer edge of the first tongue portion 434 and the central axis J and the radius Rc of the inner circumferential surface of the opening 11a. The intrusion amount E2 of the second tongue portion 435 is the difference between the distance Rt2 between the radial outer edge of the second tongue portion 435 and the central axis J and the radius Rc of the inner circumferential surface of the opening 11a. Although the illustration is omitted, the smaller the intrusion amount E, the smaller the contact area between the tongue portion 433 and the inner peripheral surface of the opening portion 11a when the cover member 420 is installed onto the container 11. Therefore, the portion of the tongue portion 433 with the smaller intrusion amount E has less frictional force with the inner peripheral surface of the opening portion 11a when it elastically deforms downward due to the downward pressure Pa applied to the tongue portion 433. Therefore, if a downward pressure Pa is applied to the tongue portion 433, the portion of the tongue portion 433 with the smaller intrusion amount E is more likely to elastically deform downward. Therefore, in this embodiment, if a downward pressure Pa is applied to the tongue portion 433, the first tongue portion 434 is more likely to elastically deform downward than the second tongue portion 435. Other structures of the sealing portion 430 in this embodiment are the same as those of the sealing portion 30 in the first embodiment described above. Other structures of the sealed glass container 410 in this embodiment are the same as those of the sealed glass container 10 in the first embodiment described above.

[0175] According to this embodiment, the tongue portion 433 has a first tongue portion 434 and a second tongue portion 435 connected to each other in the circumferential direction, and the radial outer edge of the first tongue portion 434 is located radially inward than the radial outer edge of the second tongue portion 435. Therefore, as described above, the intrusion amount E1 of the first tongue portion 434 can be made smaller than the intrusion amount E2 of the second tongue portion 435. Thus, as described above, if a downward pressure Pa is applied to the tongue portion 433, the first tongue portion 434 is more likely to elastically deform downward than the second tongue portion 435. Therefore, the sealing state of the tongue portion 433 over the opening 11a can be easily released. Therefore, it is possible to more appropriately suppress the container 11 from breaking due to the pressure difference between the outside and inside of the container 11.

[0176] In this embodiment, the ratio of the intrusion amount E1 of the first tongue portion 434 to the intrusion amount E2 of the second tongue portion 435 is preferably 48% or more. This appropriately suppresses the contact pressure between the first tongue portion 434 and the opening 11a from being too low. Therefore, it appropriately suppresses the reduction in the airtightness of the sealed glass container 410. Furthermore, the ratio of the intrusion amount E1 of the first tongue portion 434 to the intrusion amount E2 of the second tongue portion 435 is preferably 63% or less. Therefore, if a downward pressure Pa is applied to the tongue portion 433, the first tongue portion 434 is more easily elastically deformed downwards than the second tongue portion 435. Therefore, the sealing state of the tongue portion 433 over the opening 11a can be easily released.

[0177] Furthermore, in this embodiment, the first ratio R1, i.e., the ratio of the circumferential dimension of the first tongue portion 434 to the circumferential dimension of the tongue portion 433, is 10% or more and 50% or less. Therefore, similar to the tongue portion 133 in the second embodiment described above, it is possible to prevent the circumferential dimension of the first tongue portion 434 from being too small, thus making it easier for the first tongue portion 434 to elastically deform downwards. Therefore, it is possible to more appropriately suppress the container 11 from breaking due to the pressure difference between the outside and inside of the container 11. In addition, it is possible to more appropriately increase the contact pressure between the tongue portion 433 and the opening portion 11a. Therefore, since the opening portion 11a can be sealed more stably by the sealing portion 430, the airtightness of the sealed glass container 410 can be more appropriately improved.

[0178] <Modifications of the Fourth Embodiment>

[0179] Figure 13 This is a cross-sectional view showing an example of a modified example of the cover member 520 of the fourth embodiment. Figure 14 This is a top view of an example of the cover member 520 of a variation of the fourth embodiment, viewed from the side opposite to the first direction D1 (-D1 side). In the following description, the same reference numerals are used for components that are the same as those in the variations of the third embodiment and the fourth embodiment described above, and their descriptions are omitted. Figure 13 As shown, the sealed glass container 510 of this modified example includes a container 311, a cover component 520, and a sealing valve 40 (not shown).

[0180] The cover component 520 of this modification includes a cover body portion 521 and a sealing portion 530. The cover body portion 521 has a top wall portion 322 and a protrusion portion 523. The protrusion portion 523 is annular, surrounding the central axis J. In this modification, the protrusion portion 523 is an approximately square annular shape centered on the central axis J. A groove portion 524 is provided in the protrusion portion 523. The protrusion portion 523 has an inner side wall portion 525 and an outer side wall portion 526.

[0181] The groove 524 is recessed upward from the downward-facing surface of the protrusion 523. When viewed from the first direction D1, the groove 524 is a roughly square annular shape centered on the central axis J. The groove 524 surrounds the central axis J. The inner wall portion 525 is the portion of the protrusion 523 that is radially inward than the groove 524. In this modified example, the inner wall portion 525 is a roughly square annular shape centered on the central axis J. The outer wall portion 526 is the portion of the protrusion 523 that is radially outward than the groove 524. In this modified example, the outer wall portion 526 is a roughly square annular shape centered on the central axis J.

[0182] In this modified example, the sealing portion 530 has a fixing portion 531 and a tongue portion 533. The fixing portion 531 is annular in shape, protruding in the first direction D1. In this modified example, the fixing portion 531 is an approximately square annular shape centered on the central axis J. The fixing portion 531 is disposed inside the groove portion 524. The fixing portion 531 is fixed integrally to the inner surface of the groove portion 524. Figure 14 As shown, when viewed from the first direction D1, the tongue portion 533 of this embodiment is approximately square-shaped. The tongue portion 533 has a first tongue portion 534 and a second tongue portion 535.

[0183] The second tongue portion 535 is a circumferential part of the tongue portion 533. When viewed from the first direction D1, the second tongue portion 535 is approximately U-shaped. The first tongue portion 534 is another circumferential part of the tongue portion 533. The first tongue portion 534 is the portion of the tongue portion 533 excluding the second tongue portion 535. When viewed from the first direction D1, the first tongue portion 534 extends in a straight line. The first tongue portion 534 and the second tongue portion 535 are connected to each other circumferentially. The radial outer edge of the first tongue portion 534 is located radially inward than the radial outer edge of the second tongue portion 535. Therefore, as... Figure 13 As shown, the intrusion amount E1 of the first tongue portion 534 is less than the intrusion amount E2 of the second tongue portion 535. As described above, the portion of the tongue portion 533 with a smaller intrusion amount E experiences less friction with the inner circumferential surface of the opening portion 311a when it elastically deforms downward due to the downward pressure Pa applied to the tongue portion 533. Therefore, in this modified example, if a downward pressure Pa is applied to the tongue portion 533, the first tongue portion 534 is more likely to elastically deform downward than the second tongue portion 535. The other structures of the sealing portion 530 in this modified example are the same as the other structures of the sealing portion 430 in the fourth embodiment described above. The other structures of the sealed glass container 510 in this modified example are the same as the other structures of the sealed glass container 410 in the fourth embodiment described above.

[0184] According to this modified example, the tongue portion 533 has a first tongue portion 534 and a second tongue portion 535 connected to each other in the circumferential direction, with the radial outer edge of the first tongue portion 534 located radially inward than the radial outer edge of the second tongue portion 535. Therefore, as described above, the intrusion amount E1 of the first tongue portion 534 can be made smaller than the intrusion amount E2 of the second tongue portion 535. Thus, as described above, if a downward pressure Pa is applied to the tongue portion 533, the first tongue portion 534 is more likely to elastically deform downward than the second tongue portion 535. Therefore, the sealing state of the tongue portion 533 over the opening 311a can be easily released. Therefore, it is possible to more appropriately suppress the container 311 from breaking due to the pressure difference between the outside and inside of the container 311.

[0185] Hereinafter, the present invention will be specifically described through embodiments of this embodiment, but the present invention is not limited to the following description. Examples 2 to 4 and Examples 7 to 9 shown in Table 1 are embodiments of this embodiment, and Examples 1, 5 to 6 and Example 10 are comparative examples of this embodiment. Examples 12 and 15 shown in Table 2 are embodiments of this embodiment, and Examples 11, 13 to 14 and Example 16 are comparative examples of this embodiment. Examples 18 to 21 and Examples 24 to 27 shown in Table 3 are embodiments of this embodiment, and Examples 17, 22 to 23 and Example 28 are comparative examples of this embodiment.

[0186] [Example 1]

[0187] Created as if in Figures 1-4 The example shown is a sealed glass container in the form of a sealed glass container.

[0188] As a container, a circular glass container with an inner diameter of 114.8 mm and an outer diameter of 120.0 mm was used.

[0189] A circular cover component was used as the cover component.

[0190] The main body of the cap is made of polybutylene terephthalate. The outer diameter of the top wall is 124.35 mm. The outer diameter of the protrusion is appropriately adjusted so that the intrusion of the tongue portion is 2.25 mm.

[0191] The sealing part is made of silicone rubber and has a tongue length A of 6.9 mm, a tongue thickness B of 0.4 mm, and a tongue hardness C of 40°. The strength coefficient S of the tongue is 2.32. Furthermore, the hardness C of the tongue was measured using a Type A Duroy hardness tester as specified in JIS K 6253. The hardness C of the tongue was measured using an ASKER Type A rubber hardness tester manufactured by Polymer Instruments Co., Ltd. The sealing part is manufactured by inserting the cover body as an embedded component.

[0192] [Example 2]

[0193] Except that the thickness B of the tongue portion was set to 0.7 mm, the sealed glass container was manufactured in the same manner as in Example 1. The strength coefficient S of the tongue portion was 4.06.

[0194] [Example 3]

[0195] Except that the thickness B of the tongue portion was 1.1 mm, the sealed glass container was manufactured in the same manner as in Example 1. The strength coefficient S of the tongue portion was 6.38.

[0196] [Example 4]

[0197] Except that the thickness B of the tongue portion was set to 1.3 mm, the sealed glass container was manufactured in the same manner as in Example 1. The strength coefficient S of the tongue portion was 7.54.

[0198] [Example 5]

[0199] Except that the thickness B of the tongue portion was 1.7 mm, the sealed glass container was manufactured in the same manner as in Example 1. The strength coefficient S of the tongue portion was 9.86.

[0200] [Example 6]

[0201] As a container, a square glass container with a side length of 149.5 mm and a thickness of 4.2 mm was used.

[0202] A square cover component was used as the cover component.

[0203] The main body of the cap is made of polybutylene terephthalate. The length of one side of the outer peripheral surface of the top wall is 149.50 mm. The length of one side of the outer peripheral surface of the protrusion is appropriately adjusted so that the intrusion of the tongue portion is 2.25 mm.

[0204] The sealing part is made of silicone rubber and has a tongue length A of 9.3 mm, a tongue thickness B of 0.5 mm, and a tongue hardness C of 40°. The strength coefficient S of the tongue is 2.15. The sealing part is manufactured by inserting the cover body into the sealing part as an embedded component.

[0205] [Example 7]

[0206] Except that the thickness B of the tongue portion was set to 1.1 mm, the sealed glass container was manufactured in the same manner as in Example 6. The strength coefficient S of the tongue portion was 4.73.

[0207] [Example 8]

[0208] Except that the thickness B of the tongue portion was set to 1.3 mm, the sealed glass container was manufactured in the same manner as in Example 6. The strength coefficient S of the tongue portion was 5.59.

[0209] [Example 9]

[0210] Except that the thickness B of the tongue portion was set to 1.6 mm, the sealed glass container was manufactured in the same manner as in Example 6. The strength coefficient S of the tongue portion was 6.88.

[0211] [Example 10]

[0212] Except that the thickness B of the tongue portion was set to 2.1 mm, the sealed glass container was manufactured in the same manner as in Example 6. The strength coefficient S of the tongue portion was 9.03.

[0213] [Example 11]

[0214] Except that the hardness C of the tongue portion was set to 13°, a sealed glass container was manufactured in the same manner as in Example 4. The strength coefficient S of the tongue portion was 2.45.

[0215] [Example 12]

[0216] Except that the hardness C of the tongue portion was set to 30°, a sealed glass container was manufactured in the same manner as in Example 4. The strength coefficient S of the tongue portion was 5.65.

[0217] [Example 13]

[0218] Except that the hardness C of the tongue portion was set to 58°, a sealed glass container was manufactured in the same manner as in Example 4. The strength coefficient S of the tongue portion was 10.93.

[0219] [Example 14]

[0220] Except that the hardness C of the tongue portion was set to 17°, a sealed glass container was manufactured in the same manner as in Example 8. The strength coefficient S of the tongue portion was 2.38.

[0221] [Example 15]

[0222] Except that the hardness C of the tongue portion was set to 30°, a sealed glass container was manufactured in the same manner as in Example 8. The strength coefficient S of the tongue portion was 4.19.

[0223] [Example 16]

[0224] Except that the hardness C of the tongue portion was set to 65°, a sealed glass container was manufactured in the same manner as in Example 8. The strength coefficient S of the tongue portion was 9.09.

[0225] [Example 17]

[0226] Except that the length A of the tongue portion is 5.00 mm and the hardness C of the tongue portion is 37°, the sealed glass container was manufactured in the same manner as in Example 4. The strength coefficient S of the tongue portion is 9.62.

[0227] [Example 18]

[0228] Except that the length A of the tongue portion was 5.87 mm, the sealed glass container was manufactured in the same manner as in Example 17. The strength coefficient S of the tongue portion was 8.20.

[0229] [Example 19]

[0230] Except that the length A of the tongue portion is 6.21 mm, the sealed glass container was manufactured in the same manner as in Example 17. The strength coefficient S of the tongue portion is 7.75.

[0231] [Example 20]

[0232] Except that the length A of the tongue portion is 10.35 mm, the sealed glass container was manufactured in the same manner as in Example 17. The strength coefficient S of the tongue portion is 4.65.

[0233] [Example 21]

[0234] Except that the length A of the tongue portion was 16.56 mm, the sealed glass container was manufactured in the same manner as in Example 17. The strength coefficient S of the tongue portion was 2.90.

[0235] [Example 22]

[0236] Except that the length A of the tongue portion is 20.70 mm, the sealed glass container was manufactured in the same manner as in Example 17. The strength coefficient S of the tongue portion is 2.32.

[0237] [Example 23]

[0238] Except that the length A of the tongue portion was 6.51 mm and the hardness C of the tongue portion was 37°, the sealed glass container was manufactured in the same manner as in Example 8. The strength coefficient S of the tongue portion was 9.09.

[0239] [Example 24]

[0240] Except that the length A of the tongue portion was 7.91 mm, the sealed glass container was manufactured in the same manner as in Example 23. The strength coefficient S of the tongue portion was 7.49.

[0241] [Example 25]

[0242] Except that the length A of the tongue portion is 9.30 mm, the sealed glass container was manufactured in the same manner as in Example 23. The strength coefficient S of the tongue portion is 6.37.

[0243] [Example 26]

[0244] Except that the length A of the tongue portion was 13.95 mm, the sealed glass container was manufactured in the same manner as in Example 23. The strength coefficient S of the tongue portion was 4.24.

[0245] [Example 27]

[0246] Except that the length A of the tongue portion is 22.32 mm, the sealed glass container was manufactured in the same manner as in Example 23. The strength coefficient S of the tongue portion is 2.65.

[0247] [Example 28]

[0248] Except that the length A of the tongue portion was 25.11 mm, the sealed glass container was manufactured in the same manner as in Example 23. The strength coefficient S of the tongue portion was 2.36.

[0249] [Seamless Test]

[0250] First, fill the sealed glass container with water to 30% of its volume, then attach the lid. Next, with the sealed glass container tilted at 90° (partially with the periphery facing upwards), place it on a table for 30 minutes. Then, rotate the sealed glass container 90° so that the lid is facing downwards and place it on the table for another 30 minutes. Finally, check the table for any water that has leaked from the sealed glass container.

[0251] In the evaluation of airtightness, excellent airtightness is indicated when no water adheres to the platform.

[0252] The evaluation of the airtightness tests in Tables 1-3 was based on the following criteria.

[0253] 〇: No water adheres to the platform

[0254] ×: Water is attached to the platform.

[0255] [Decompression test]

[0256] First, water, amounting to 10% of the container's volume, is placed inside the sealed glass container, and then the water is brought to a boil. Next, the lid is installed on the container, and the interior of the container is cooled by applying water, preferably running water, at a temperature below 25°C. It is then confirmed whether at least a portion of the tongue elastically deforms downwards during the period until the temperature inside the container drops to 25°C.

[0257] In the decompression test, the excellent performance of releasing the airtightness of the sealed glass container is indicated when at least a portion of the tongue undergoes elastic deformation to the downward side.

[0258] The evaluation of the decompression tests in Tables 1-3 was based on the following criteria.

[0259] 〇: At least a portion of the tongue portion underwent elastic deformation to the downward side.

[0260] ×: At least a portion of the tongue portion did not undergo elastic deformation towards the lower side.

[0261] Table 1

[0262]

[0263] As shown in Table 1, the sealed glass containers of Examples 2 to 4 and Examples 7 to 9, whose tongue strength coefficient S is 2.5 or higher, have superior airtightness compared to the sealed glass containers of Examples 1 and Example 6, whose tongue strength coefficient S is less than 2.5.

[0264] In Examples 2-4 and 7-9, the strength coefficient S of the tongue portion of the sealed glass container is 2.5 or higher, thus preventing the strength of the tongue portion in the first direction from being too low. Therefore, the contact pressure between the tongue portion and the opening portion can be appropriately increased as described above, allowing the opening portion to be stably sealed by the sealing portion. Thus, the airtightness of the sealed glass container can be improved.

[0265] On the other hand, in Examples 1 and 6, the thickness B of the tongue portion of the sealed glass container is too thin, resulting in a strength coefficient S of less than 2.5 for the tongue portion. Consequently, the strength of the tongue portion in the first direction is too low. Therefore, as described above, the contact pressure between the tongue portion and the opening is too low, making it difficult to improve the airtightness of the sealed glass container.

[0266] As shown in Table 1, the sealed glass containers of Examples 2-4 and Examples 7-9, whose tongue strength coefficient S is 9.0 or less, have superior airtightness performance compared to the sealed glass containers of Examples 1 and Example 6, whose tongue strength coefficient S is greater than 9.0.

[0267] In Examples 2-4 and 7-9, the strength coefficient S of the tongue portion of the sealed glass containers is 9.0 or less, thus preventing excessive strength in the first direction of the tongue portion. Therefore, when the internal pressure of the container is reduced, the tongue portion easily undergoes elastic deformation downwards due to the pressure difference between the external and internal pressures. This easily releases the seal of the opening by the tongue portion, resulting in excellent airtightness of the sealed glass containers. Therefore, in decompression tests, container breakage can be appropriately suppressed.

[0268] On the other hand, in Examples 1 and 6, the thickness B of the tongue portion of the sealed glass container is too thick, resulting in a strength coefficient S greater than 9.0 for the tongue portion. Therefore, the strength of the tongue portion in the first direction is excessive. Consequently, the tongue portion cannot elastically deform downwards due to the pressure difference between the external and internal air pressures of the container, making it difficult to improve the airtightness of the sealed glass container. Therefore, it is difficult to prevent container breakage during decompression tests.

[0269] Table 2

[0270]

[0271] As shown in Table 2, the sealed glass containers of Examples 4, 8, 12 and 15, whose tongue strength coefficient S is 2.5 or higher, have superior airtightness compared to the sealed glass containers of Examples 11 and 14, whose tongue strength coefficient S is less than 2.5.

[0272] The airtight glass containers in Examples 4, 8, 12, and 15 can improve their airtightness because they can suppress the excessive strength of the tongue portion in the first direction as described above.

[0273] On the other hand, in Examples 11 and 14, the hardness C of the tongue portion of the sealed glass container is too low, resulting in a strength coefficient S of less than 2.5 for the tongue portion. Consequently, the strength of the tongue portion in the first direction is too low. Therefore, as described above, the contact pressure between the tongue portion and the opening is too low, making it difficult to improve the airtightness of the sealed glass container.

[0274] As shown in Table 2, the sealed glass containers of Examples 4, 8, 12 and 15, whose tongue strength coefficient S is 9.0 or less, have superior airtightness performance compared to the sealed glass containers of Examples 13 and 16, whose tongue strength coefficient S is greater than 9.0.

[0275] The sealed glass containers in Examples 4, 8, 12, and 15 exhibit excellent airtightness due to their ability to suppress excessive strength in the first direction of the tongue portion, as described above. Therefore, they can appropriately suppress container breakage during decompression tests.

[0276] On the other hand, in Examples 13 and 16, the hardness C of the tongue portion of the sealed glass container is too high, resulting in a strength coefficient S greater than 9.0 for the tongue portion. Therefore, the strength of the tongue portion in the first direction is excessive. Consequently, the tongue portion cannot elastically deform downwards due to the pressure difference between the external and internal air pressures of the container, making it difficult to improve the airtightness of the sealed glass container. Therefore, it is difficult to prevent container breakage during decompression tests.

[0277] Table 3

[0278]

[0279] As shown in Table 3, the sealed glass containers of Examples 18-21 and Examples 24-27, whose tongue strength coefficient S is 2.5 or higher, have superior airtightness compared to the sealed glass containers of Examples 22 and 28, whose tongue strength coefficient S is less than 2.5.

[0280] The airtight glass containers in Examples 18-21 and 24-27 can improve their airtightness because they can suppress the excessive strength of the tongue portion in the first direction as described above.

[0281] On the other hand, in Examples 22 and 28, the length A of the tongue portion of the sealed glass container is too long, resulting in a strength coefficient S of less than 2.5 for the tongue portion. Therefore, the strength of the tongue portion in the first direction is too low. Consequently, as described above, the contact pressure between the tongue portion and the opening is too low, making it difficult to improve the airtightness of the sealed glass container.

[0282] As shown in Table 3, the sealed glass containers of Examples 18-21 and Examples 24-27, whose tongue strength coefficient S is 9.0 or less, have superior airtightness performance compared to the sealed glass containers of Examples 17 and Examples 23, whose tongue strength coefficient S is greater than 9.0.

[0283] The sealed glass containers in Examples 18-21 and 24-27 exhibit excellent airtightness due to their ability to suppress excessive strength in the first direction of the tongue portion, as described above. Therefore, they can appropriately suppress container breakage during decompression tests.

[0284] On the other hand, in Examples 17 and 23, the length A of the tongue portion of the sealed glass container is too short, resulting in a strength coefficient S greater than 9.0 for the tongue portion. Therefore, the strength of the tongue portion in the first direction is excessive. Consequently, the tongue portion cannot elastically deform downwards due to the pressure difference between the external and internal air pressures of the container, making it difficult to improve the airtightness of the sealed glass container. Therefore, it is difficult to prevent container breakage during decompression tests.

[0285] As described above, the strength coefficient S of the tongue portion is a parameter of the tongue portion calculated by B×C / A, where the radial length of the tongue portion is A, the radial thickness of the center portion of the tongue portion is B, and the hardness of the tongue portion is C. Therefore, by appropriately setting the radial length A, the radial thickness B, and the hardness C of the tongue portion, and making the strength coefficient S of the tongue portion 2.5 or higher and 9.0 or lower, it is possible to improve both the airtightness of the airtight glass container and its performance in releasing the airtightness of the airtight glass container.

[0286] The embodiments of the present invention have been described above. However, the structures and combinations thereof in the embodiments are merely examples, and additions, omissions, substitutions, and other modifications to the structures can be made without departing from the spirit of the present invention. Furthermore, the present invention is not limited to the embodiments described above.

[0287] The shape of the container is not limited to this embodiment; for example, it may also be other shapes such as a triangular cylinder or a pentagonal cylinder extending along the first direction. In this case, the structure of each part of the lid component can be appropriately adopted to stably seal the opening of the container.

[0288] The shape of the tongue portion is not limited to this embodiment. For example, the tongue portion may not have an outer fixing portion. Furthermore, the end of the tongue portion may not be arc-shaped, but rather have a corner shape, for example. Additionally, the tongue portion may be a straight line positioned on one side in the first direction as it moves radially outward.

Claims

1. A cover component, installed on a container having an opening on one side in a first direction, for sealing the opening, wherein, The cover component includes: The top wall portion blocks the opening from one side of the first direction; An annular protrusion protrudes from the top wall portion toward the other side in the first direction and is disposed inside the container; and The sealing part is elastic and seals the opening. The protrusion is provided with an annular groove recessed to one side in the first direction. The groove will surround a central axis extending in a direction parallel to the first direction. The sealing part has: An annular fixing part is fixed to the inner surface of the groove; and The annular tongue portion protrudes radially outward from the fixing portion about the central axis, sealing the opening. When the radial length of the tongue portion is set as A, the thickness of the radial center portion of the tongue portion is set as B, and the hardness of the tongue portion measured by a JIS K6253-3 Type A Duro hardness tester is set as C, the following relationship is satisfied: 2.5≦B×C / A≦9.

0.

2. The cover component according to claim 1, wherein, The fixing part is fixed to the inner surface of the groove as a whole.

3. The cover component according to claim 1, wherein, The dimension of the fixing part in the first direction is greater than the dimension of the fixing part in the radial direction.

4. The cover component according to claim 1, wherein, The protrusion has: The inner wall portion, which is the portion that is radially inner than the groove portion; and The outer wall portion, which is the portion that is radially outer than the groove portion. The end of the outer side wall portion in the first direction is located on the side of the first direction that is closer to the first direction than the end of the inner side wall portion in the first direction.

5. The cover component according to claim 4, wherein, The tongue portion has an outer fixing portion fixed to the outer side wall portion facing the radially outer side.

6. The cover component according to claim 1, wherein, The tongue portion has a curved shape that is positioned on one side of the first direction as it moves outward toward the radial direction.

7. The cover component according to claim 6, wherein, The direction in which the tongue protrudes from the fixing part is an angle of 45° or more and 80° or less relative to the first direction.

8. The cover component according to claim 1, wherein, When viewed circumferentially from the central axis, the end of the tongue portion has a curved shape that protrudes outward in the radial direction.

9. The cover component according to any one of claims 1 to 8, wherein, The tongue portion has a first tongue portion and a second tongue portion that are circumferentially connected to each other about the central axis. The ratio of the circumferential dimension of the first tongue portion to the circumferential dimension of the tongue portion is more than 10% and less than 50%. The rigidity of the first tongue portion in the first direction is less than the rigidity of the second tongue portion in the first direction.

10. The cover component according to claim 9, wherein, The ratio of the average thickness of the radial center portion of the first tongue portion in the circumferential direction to the average thickness of the radial center portion of the second tongue portion in the circumferential direction is more than 50% and less than 95%.

11. The cover component according to any one of claims 1 to 8, wherein, The tongue portion has a first tongue portion and a second tongue portion that are circumferentially connected to each other about the central axis. The radial outer edge of the first tongue portion is located radially inner than the radial outer edge of the second tongue portion.

12. The cover component according to any one of claims 1 to 8, wherein, The opening is cylindrical with the central axis as its center. The tongue portion has a first tongue portion and a second tongue portion that are circumferentially connected to each other about the central axis. The ratio of the circumferential dimension of the first tongue portion to the circumferential dimension of the tongue portion is more than 10% and less than 50%. The radial inner edge of the first tongue portion is located closer to the central axis than the radial inner edge of the second tongue portion. The radial length of the first tongue portion is longer than the radial length of the second tongue portion.

13. The cover component according to claim 1, wherein, The sealing part is made of silicone rubber.

14. A sealed glass container, wherein, have: The cover component according to any one of claims 1 to 8; and A glass container having the opening described above.

15. A sealed glass container, wherein, have: The cover component as claimed in claim 1; and A glass container having the aforementioned opening. When water of 10% of the container's volume is added to the container and boiled, and then the container's internal pressure is reduced by cooling the container with water at a temperature below 25°C while the lid is installed in the container, at least a portion of the tongue portion elastically deforms to the other side of the first direction, thereby releasing the sealing state of the tongue portion over the opening and suppressing damage to the container.

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