Plug body for beverage container and beverage container

Abstract

To provide a plug body for a beverage container for carbonated beverage having internal pressure releasing means with a simple structure and a beverage container equipped with the plug body.SOLUTION: A plug body S comprises an inner plug part 3 which is inserted into an upper opening 2 of a container body 1 to seal the upper opening 2, and an outer lid part 4 which is rotatably attached to the inner plug part 3 so as to cover an outside of the inner plug part 3, the inner plug part 3 is provided with a vent 5 that communicates between the outside of the inner plug part 3 and the inside of the container body 1 when the inner plug part 3 closes the upper opening 2, the outer lid part 4 is configured so that a seal member 6 moves away from the vent 5 to open the vent 5, when the seal member 6 is provided to seal the vent 5 and the outer lid part 4 is rotated relative to the inner plug part 3 in a direction to screw the plug body S out of the upper opening 2 of the container body 1.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a closure for a beverage container that is also compatible with beverages containing carbon dioxide, and to a beverage container. [Background technology]

[0002] 2. Description of the Related Art Beverage containers that can also accommodate beverages containing carbon dioxide gas (hereinafter referred to as carbonated beverages) have been proposed.

[0003] For example, the following Patent Document 1 discloses a beverage container having a cylindrical container body with a bottom and a plug for closing the opening of the container body, in which a pressure adjustment port is formed on the surface of the plug facing the inside of the container body for reducing the internal pressure in the container body when the internal pressure rises, a pressure relief passage communicating the pressure adjustment port and an exhaust port is formed inside the plug, and a pressure adjustment valve biased to a closed state by a spring force is provided in the pressure relief passage. The pressure adjustment valve is configured to keep the pressure adjustment port closed when the internal pressure in the container body is normal, but to open and release the internal pressure when the internal pressure in the container body becomes higher than the spring force, so that even if the internal pressure rises due to the inclusion of a carbonated beverage in the container body, a problem such as an appropriate amount of carbon dioxide gas being discharged and the plug being unable to be opened can be avoided. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2003-38360 A Summary of the Invention [Problem to be solved by the invention]

[0005] The present invention provides a beverage container stopper having a simple structure that is compatible with carbonated beverages similar to that of Patent Document 1 above but that has an internal pressure release means different from that of Patent Document 1, and a beverage container equipped with this stopper. [Means for solving the problem]

[0006] The gist of the present invention will now be described with reference to the accompanying drawings.

[0007] A stopper (S) for a beverage container that can be detachably attached to an upper opening (2) of a container body (1) by rotating and screwing the stopper (S), The stopper S comprises an inner stopper part 3 that is inserted into an upper opening 2 of the container body 1 to seal the upper opening 2, and an outer lid part 4 for opening and closing the stopper S that is rotatably attached to the inner stopper part 3 so as to cover the outside of the inner stopper part 3, The inner plug portion 3 is provided with a vent hole 5 that communicates between the outside of the inner plug portion 3 and the inside of the container body 1 when the inner plug portion 3 closes the upper opening 2, and the vent hole 5 is provided at a position eccentric to the rotation center of the inner plug portion 3, The outer lid portion 4 is provided with a seal member 6 for sealing the vent hole 5, and the seal member 6 is provided at a position eccentric to the rotation center of the outer lid portion 4, When the outer lid portion 4 is rotated relative to the inner plug portion 3 in a direction in which the plug body S is screwed into the upper opening 2 of the container body 1, the sealing member 6 moves toward the vent hole 5, and the vent hole 5 is sealed by the sealing member 6, and when the outer lid portion 4 is rotated relative to the inner plug portion 3 from the sealed state of the vent hole 5 in a direction in which the plug body S is unscrewed from the upper opening 2 of the container body 1, the sealing member 6 moves out of the vent hole 5, and the vent hole 5 is opened. The stopper S is equipped with a rotation restriction mechanism 7 which restricts the rotation range of the outer lid portion 4 relative to the inner stopper portion 3 to a rotation angle of 90 degrees or less, and is configured so that by rotating the outer lid portion 4 within the rotation range restricted by this rotation restriction mechanism 7, a state in which the vent hole 5 is sealed by the sealing member 6 and a state in which the sealing member 6 detaches from the vent hole 5 and the vent hole 5 is opened can be switched between these.The rotation restriction mechanism 7 has a stopper interlocking mechanism 8 which rotates the inner stopper portion 3 in conjunction with the outer lid portion 4 when the outer lid portion 4 exceeds the rotation range restricted by this rotation restriction mechanism 7, and is configured so that the stopper S can be screwed into or unscrewed from the upper opening 2 of the container body 1 by the stopper interlocking mechanism 8.

[0008] In addition, the rotation restriction mechanism 7 is The outer lid portion 4 is provided with a moving portion 9 which rotates in accordance with the rotation of the outer lid portion 4, and the inner plug portion 3 is provided with a rotation stopper collision portion 10 against which the rotating moving portion 9 collides. The outer lid portion 4 is configured to be restricted from rotating relative to the inner plug portion 3 by the moving portion 9 colliding with the rotation stopper collision portion 10. The plug interlocking mechanism 8 is This relates to the stopper for a beverage container as described in claim 1, characterized in that when the outer lid portion 4 is rotated even after the moving part 9 collides with the rotation stopper collision part 10, the rotational force applied to the outer lid portion 4 is transmitted to the inner stopper portion 3 via the moving part 9 in a colliding state and the rotation stopper collision part 10, causing the inner stopper portion 3 to rotate in conjunction.

[0009] In addition, the rotation restriction mechanism 7 is This relates to a stopper for a beverage container as described in claim 2, characterized in that it has a stopper separation mechanism 11 which makes it impossible to separate the outer lid portion 4 and the inner stopper portion 3 when the outer lid portion 4 is in a rotation-restricted state relative to the inner stopper portion 3 where the moving portion 9 has collided with the rotation-stopping collision portion 10, and which makes it possible to separate the outer lid portion 4 and the inner stopper portion 3 when the outer lid portion 4 is in the middle of rotation relative to the inner stopper portion 3 where the moving portion 9 has not collided with the rotation-stopping collision portion 10.

[0010] The stopper S relates to a stopper for a beverage container as described in claim 1, characterized in that the inner stopper portion 3 has a male thread portion 13, and the stopper S is removably attached to the upper opening 2 of the container body 1 by screwing this male thread portion 13 into a female thread portion 12 provided on the upper opening 2 of the container body 1.

[0011] The present invention also relates to a beverage container characterized in that the stopper S of the beverage container according to any one of claims 1 to 4 is detachably attached to the upper opening 2 of the container body 1 by rotational screw engagement. Effect of the Invention

[0012] Since the present invention is configured as described above, by rotating the outer lid portion relative to the inner plug portion in a direction in which the plug body is screwed into the upper opening of the container body, the vent hole is sealed by the sealing member to prevent beverage leakage, and when one wishes to drink the beverage inside the container body, by rotating the outer lid portion relative to the inner plug portion from this beverage leakage-proof sealed state in a direction in which the plug body is unscrewed from the upper opening of the container body, the sealing member moves away from the vent hole and the vent hole is opened, and as a result, when the internal pressure inside the container body is high due to the carbonated beverage or the like contained therein, carbon dioxide gas is exhausted from the vent hole. The stopper can be easily rotated open and closed when the container is opened, and the rotation control mechanism allows the stopper to be easily rotated open or closed when the user wishes to drink the beverage (when the internal pressure of the container body is released) by a rotation of less than 90 degrees. By continuing to rotate the outer lid even after this switching operation is completed, the stopper interlocking mechanism causes the inner stopper to rotate together with the outer lid, allowing the stopper to be screwed into or unscrewed from the upper opening of the container body, resulting in a beverage container stopper and beverage container with a simple structure that is extremely practical.

[0013] In addition, in the invention described in claim 2, the rotation restriction mechanism, which can switch between a sealed state and an open state of the vent hole by the sealing member by rotating the outer lid portion within a rotation range of 90 degrees or less, and the plug interlocking mechanism, which rotates the inner plug portion together with the outer lid portion in conjunction with the inner plug portion after the switching is completed, can be easily designed and realized with a simple configuration, resulting in a beverage container plug with an even more practical configuration.

[0014] In addition, in the invention described in claim 3, the outer lid portion can be separated from the inner plug portion by the plug separation mechanism, thereby making it possible to wash both the outer lid portion and the inner plug portion separately and keep the plug hygienic, resulting in a beverage container plug with an even more practical configuration.

[0015] In addition, in the invention described in claim 4, the stopper has an inner stopper portion that can be screwed into the upper opening of the container body and an outer lid portion that can rotate relative to the screwed inner stopper portion, making the stopper structure simple and easy to design and realize, resulting in a stopper for a beverage container with an even more practical configuration. [Brief description of the drawings]

[0016] [Figure 1] FIG. 1 is a perspective view showing a first embodiment. [Diagram 2] FIG. 2 is a partially enlarged front sectional view showing the first embodiment. [Diagram 3] FIG. 2 is an exploded perspective view showing the plug of Example 1, viewed from above. [Figure 4] FIG. 2 is an exploded perspective view showing the plug of Example 1, viewed from below. [Diagram 5] FIG. 2 is an enlarged cross-sectional plan view showing the first embodiment, illustrating a state in which the vent hole is sealed by the sealing member. [Figure 6] FIG. 2 is an explanatory enlarged cross-sectional plan view showing the first embodiment in a state in which the sealing member has been removed from the vent hole and the vent hole has been opened. [Figure 7] FIG. 2 is an explanatory enlarged front sectional view of a rotation restriction mechanism having a plug interlocking mechanism and a plug separation mechanism, showing the plug (outer plug portion omitted) of Example 1. [Figure 8] 1 shows the plug of Example 2, with (a) being a bottom view of the outer cap portion and (b) being a plan view of the inner plug portion. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] BEST MODE FOR CARRYING OUT THE PRESENT DISCLOSURE The preferred embodiment of the present invention will be briefly described with reference to the drawings, showing the operation of the present invention.

[0018] The stopper S of the beverage container of the present invention is removably attached to an upper opening 2 of a container body 1 having an upper opening 2 by rotating and screwing the said upper opening 2. Alternatively, the beverage container of the present invention has a stopper S removably attached to the upper opening 2 of a container body 1 having an upper opening 2.

[0019] The stopper S of the present invention is composed of an inner stopper part 3 that is inserted into an upper opening 2 of the container body 1 to seal the upper opening 2, and an outer lid part 4 for opening and closing the stopper S that is rotatably attached to the inner stopper part 3 so as to cover the outside of the inner stopper part 3. The inner stopper part 3 is provided with a vent hole 5 that communicates between the outside of the inner stopper part 3 and the inside of the container body 1 when the inner stopper part 3 closes the upper opening 2, and the vent hole 5 is provided at a position eccentric to the center of rotation of the inner stopper part 3, while the outer lid part 4 is provided with a seal member 6 that seals the vent hole 5, This sealing member 6 is provided at a position eccentric to the rotation center of the outer lid portion 4, and when the outer lid portion 4 is rotated relative to the inner plug portion 3 in a direction to screw the plug body S into the upper opening 2 of the container body 1, the sealing member 6 moves toward the vent hole 5 and seals the vent hole 5, and when the outer lid portion 4 is rotated relative to the inner plug portion 3 from the sealed state of the vent hole 5 in a direction to screw the plug body S out of the upper opening 2 of the container body 1, the sealing member 6 moves out of the vent hole 5 and the vent hole 5 is opened.

[0020] Therefore, when the beverage in the container body 1 is not to be consumed, the outer lid portion 4 is rotated relative to the inner plug portion 3 in a direction in which the plug body S is screwed into the upper opening 2 of the container body 1, and the vent hole 5 is sealed by the sealing member 6 to create a sealed state to prevent beverage leakage. When it is desired to consume the beverage in the container body 1, from this sealed state to prevent beverage leakage, the outer lid portion 4 is rotated relative to the inner plug portion 3 in a direction in which the plug body S is unscrewed from the upper opening 2 of the container body 1, and the sealing member 6 moves out of the vent hole 5 to close the vent hole 5. is opened, so that when a carbonated beverage is placed inside the container body 1 and the internal pressure becomes high due to the carbon dioxide gas, the carbon dioxide gas is discharged from this vent hole 5, preventing the inconvenience of making it difficult to open (rotate) the stopper body S, and the stopper body S can be easily opened and rotated to drink the carbonated beverage inside the container body 1.Furthermore, the configuration in which the vent hole 5 and the sealing member 6 are misaligned by rotating the outer lid part 4 relative to the inner stopper part 3, switching between a sealed state and an open state, is a simple configuration that can be easily designed and realized.

[0021] Furthermore, the stopper S of the present invention is configured such that the rotation range of the outer lid part 4 relative to the inner stopper part 3 is restricted by a rotation restriction mechanism 7 to a rotation angle of 90 degrees or less, and by rotating the outer lid part 4 within the rotation range restricted by this rotation restriction mechanism 7, a state in which the vent hole 5 is sealed by the seal member 6 and a state in which the seal member 6 is detached from the vent hole 5 and the vent hole 5 is opened can be switched between these. Therefore, the outer lid part 4 can be easily rotated within a rotation range of 90 degrees or less both when the beverage in the container body 1 is not to be consumed (to obtain a sealed state to prevent beverage leakage) and when the beverage is to be consumed (to release the internal pressure in the container body 1).

[0022] Furthermore, when the outer lid portion 4 exceeds the rotation range restricted by the rotation restricting mechanism 7 , the inner plug portion 3 rotates together with the outer lid portion 4 due to the plug interlocking mechanism 8 of the rotation restricting mechanism 7 .

[0023] In other words, the switching between sealing and opening of the vent hole 5 by the sealing member 6 can be completed with a small rotation operation of less than 90 degrees by the rotation restriction mechanism 7, and if the rotation operation of the outer lid part 4 is continued even after the switching operation is completed, the inner stopper part 3 will rotate together with the outer lid part 4, and the stopper body S can be screwed into or unscrewed from the upper opening 2 of the container body 1. EXAMPLES

[0024] A specific embodiment 1 of the present invention will be described with reference to FIGS. 1 to 7. FIG.

[0025] This embodiment is applied to a portable water bottle as shown in Figures 1 and 2, in which a synthetic resin stopper S is removably attached to the upper opening 2 of a metal container body 1, and when the stopper S is removed from the container body 1, the user can directly attach their mouth to the upper opening 2 and drink the beverage contained in the container body 1.

[0026] Regarding the attachment / detachment structure between the container body 1 and the stopper S, as shown in FIG. 2, a female thread portion 12 is formed on the inner peripheral surface of the upper opening 2 of the container body 1, while a male thread portion 13 that screws into this female thread portion 12 is provided on the outer peripheral surface of the inner stopper portion 3 of the stopper S, which will be described later. The stopper S is attached to the upper opening 2 of the container body 1 by rotating the stopper S (clockwise in FIG. 1) to screw (screw) the male thread portion 13 into the female thread portion 12, and the stopper S can be removed from the upper opening 2 of the container body 1 by rotating the stopper S in the unscrewing direction (counterclockwise in FIG. 1).

[0027] Regarding the stopper S of this embodiment, the stopper S is composed of an inner stopper portion 3 that is inserted into the upper opening 2 of the container body 1 to seal this upper opening 2, and an outer lid portion 4 for opening and closing the stopper S that is rotatably attached to the inner stopper portion 3 so as to cover the outside of the inner stopper portion 3.

[0028] Specifically, the inner plug portion 3 is made of synthetic resin and comprises a bottomed, cylindrical inner plug main body 14 having a diameter dimension that allows it to be inserted into the upper opening 2 from above, and a covering portion 15 that is connected to the entire circumference of the upper edge of the inner plug main body 14, protrudes slightly outward, and then hangs down downward, and is configured so that when the inner plug main body 14 is inserted into the upper opening 2 from above, the upper end and the entire outer circumferential side surface of the upper opening 2 are covered from above by this covering portion 15 (see Figures 2 to 4).

[0029] In addition, this inner plug portion 3 has a ring-shaped beverage leakage prevention gasket 16 disposed around the lower part of the inner plug main body portion 14, which is in close contact with the inner surface near the upper opening 2 of the container body 1, and the male thread portion 13 is integrally molded on the lower outer circumferential surface above this beverage leakage prevention gasket 16 (see Figures 2 and 4).

[0030] Further, a small-diameter vent hole 5 is formed through the disk-shaped bottom of the inner plug body 14 of the inner plug 3, which communicates between the outside of the inner plug 3 and the inside of the container body 1 when the inner plug 3 closes the upper opening 2, and this vent hole 5 is provided at a position eccentric to the rotation center of the inner plug 3 (see Figures 2, 3, 4 and 6). This vent hole 5 is for discharging to the outside the internal pressure (carbon dioxide pressure) when a carbonated beverage is contained in the container body 1, and further, at four places in the upper part of the covering part 15, vent grooves 24 are formed (integrally molded) which function as exhaust paths for discharging the carbon dioxide gas discharged from the vent hole 5 to the outside of the plug S.

[0031] The outer lid portion 4 is made of synthetic resin and comprises a cylindrical outer plug portion 17 with a bottom having a diameter dimension that allows it to be inserted into the inner plug main body portion 14 from above and to be rotatable horizontally relative to the inner plug main body portion 14, and an upper portion of the outer plug portion 17 and an exterior portion 18 shaped to cover the entire outer circumferential side surface of the covering portion 15 from the outside when the outer plug portion 17 is inserted into the inner plug main body portion 14 from above (see Figures 2 to 4). The outer circumferential side surface of the exterior portion 18 is integrally formed with a number of vertically elongated recesses 19 in the circumferential direction of the exterior portion 18, and the user can place their hands (fingers) in these recesses 19 to provide an anti-slip effect when opening, closing, and rotating the plug body S (outer lid portion 4).

[0032] Furthermore, a small-diameter mounting hole 20 is formed through the disk-shaped bottom of the outer plug portion 17 of the outer lid portion 4 at a position eccentric to the rotation center of the outer lid portion 4, and a seal member 6 made of an elastic material such as synthetic rubber for sealing the vent hole 5 is inserted and attached into this mounting hole 20. That is, in the outer lid portion 4, the seal member 6 for sealing the vent hole 5 is provided on the disk-shaped bottom of the outer plug portion 17 at a position eccentric to the rotation center of the outer lid portion 4 (see Figures 2 to 4).

[0033] When the outer lid portion 4 is rotated relative to the inner plug portion 3 in a direction in which the plug body S is screwed into the upper opening 2 of the container body 1, the sealing member 6 moves toward the vent hole 5, thereby sealing the vent hole 5, and when the outer lid portion 4 is rotated relative to the inner plug portion 3 from the sealed state of the vent hole 5 (the state in Figures 2 and 5) in a direction in which the plug body S is screwed out of the upper opening 2 of the container body 1 (the direction indicated by the arrow in Figure 5), the sealing member 6 moves out of the vent hole 5, as shown in Figure 6, and the vent hole 5 is opened.

[0034] Therefore, for example, if a carbonated beverage is stored in the container body 1, and the carbonated beverage is not to be consumed, the outer lid portion 4 can be rotated relative to the inner plug portion 3 in a direction that screws the stopper body S into the upper opening 2 of the container body 1, and the vent hole 5 can be sealed by the sealing member 6 to prevent beverage leakage. When the carbonated beverage is to be consumed, from this leak-proof, sealed state, the outer lid portion 4 can be rotated relative to the inner plug portion 3 in a direction that screws the stopper body S out of the upper opening 2 of the container body 1, and the sealing member 6 can be moved out of the vent hole 5 to open the vent hole 5. As a result, even if the internal pressure inside the container body 1 is high due to carbon dioxide gas, the carbon dioxide gas will be discharged from the vent hole 5, preventing the stopper body S from being difficult to open (rotate), and the stopper body S can be easily opened and rotated to drink the carbonated beverage in the container body 1.

[0035] Regarding the mounting structure of the inner plug portion 3 and the outer lid portion 4, as shown in FIG. 3, mounting grooves 21 are provided at opposing positions on the inner peripheral surface of the inner plug main body portion 14 of the inner plug portion 3, while as shown in FIG. 4, a plate-shaped movable portion 9 capable of engaging with the mounting groove 21 is protruded horizontally outwardly at an opposing position on the outer peripheral surface of the outer plug portion 17 of the outer lid portion 4.

[0036] As shown in FIG. 7, the mounting groove 21 is formed into a substantially inverted T-shaped groove consisting of vertical groove portions 21A having a groove length in the vertical (up-down) direction and an open upper portion, a first horizontal groove portion 21B that extends long from the lower end of each vertical groove portion 21A to one side (right side in FIG. 7) along the circumferential direction (horizontal direction) of the inner plug main body portion 14, and a second horizontal groove portion 21C that extends short from the lower end of each vertical groove portion 21A to the other side (left side in FIG. 7) along the circumferential direction of the inner plug main body portion 14, and the inverted T-shaped mounting grooves 21 located in opposing positions are each configured to be point-symmetrical with respect to the rotation center of the inner plug portion 3.

[0037] The outer plug part 17 can be inserted into the inner plug main body part 14 from above by aligning the position of the moving part 9 with the vertical groove part 21A and engaging the moving part 9 with the vertical groove part 21A from its upper open part, and when the outer plug part 17 is inserted into the inner plug main body part 14 until the moving part 9 reaches the lower limit of insertion and engagement of the vertical groove part 21A, the outer lid part 4 (outer plug part 17) is horizontally rotated in a clockwise direction (screw-in (screw-in) direction) to move the moving part 9 to the first horizontal part continuing from the lower end of the vertical groove part 21A. When the outer plug part 17 is engaged with the groove part 21B, the outer lid part 4 is attached to the inner plug part 3 in a state where it is prevented from coming off from the inner plug main body part 14, and even if the outer lid part 4 is horizontally rotated counterclockwise (in the direction of unscrewing) from this attached (prevented) state to move the moving part 9 from the first horizontal groove part 21B through the vertical groove part 21A and engage a part of it (the tip part in the direction of rotational movement) with the second horizontal groove part 21C, the outer plug part 17 is prevented from coming off from the inner plug main body part 14 and the outer lid part 4 is attached to the inner plug part 3. In addition, the vertical groove part 21A has one of the vertical groove walls on both sides formed as an inclined wall so that the opening width of the upper opening part becomes wider toward the upper side (see FIG. 7), which makes it easy to insert and engage the moving part 9 from the upper opening part of the vertical groove part 21A, and makes it easy to assemble the outer lid part 4 to the inner plug part 3.

[0038] In addition, the stopper S in this embodiment is equipped with a rotation restriction mechanism 7 which restricts the rotation range of the outer lid portion 4 relative to the inner stopper portion 3 to a rotation angle of 90 degrees or less, and is configured so that by rotating the outer lid portion 4 within the rotation range restricted by this rotation restriction mechanism 7, a state in which the vent hole 5 is sealed by the sealing member 6 and a state in which the sealing member 6 detaches from the vent hole 5 and the vent hole 5 is opened can be switched between these. Furthermore, this rotation restriction mechanism 7 has a stopper interlocking mechanism 8 which rotates the inner stopper portion 3 in conjunction with the outer lid portion 4 when the outer lid portion 4 exceeds the rotation range restricted by this rotation restriction mechanism 7, and is configured so that the stopper S can be screwed into or unscrewed from the upper opening 2 of the container body 1 by the stopper interlocking mechanism 8 rotating the outer lid portion 4 and the inner stopper portion 3 in conjunction with each other.

[0039] This rotation restriction mechanism 7 is composed of the mounting groove 21 provided in the inner plug portion 3 (inner plug main body portion 14) and the moving part 9 provided in the outer cap portion 4 (outer plug portion 17), and a rotation stop collision part 10 against which the moving part 9, which moves in a rotating manner as the outer cap portion 4 rotates, is provided in the mounting groove 21 of the inner plug portion 3 (inner plug main body portion 14), and the rotation of the outer cap portion 4 relative to the inner plug portion 3 is restricted by the moving part 9 colliding with the rotation stop collision part 10.

[0040] In addition, the anti-pivot collision portion 10 is formed by the vertical groove end wall 10A of the first lateral groove portion 21B, which constitutes the horizontal pivot movement limit of the moving portion 9, and the vertical groove end wall 10B of the second lateral groove portion 21C, as the moving portion 9 moves reciprocatingly (rotating) horizontally between the first lateral groove portion 21B and the second lateral groove portion 21C of the mounting groove 21 (via the vertical groove portion 21A) (see Figures 5 to 7). In other words, the outer lid portion 4 is configured to move reciprocatingly and horizontally in rotation relative to the inner plug portion 3 within a rotation range allowed by the vertical groove portion 21A, the first lateral groove portion 21B, and the second lateral groove portion 21C (within the rotation range until the end portion at the tip side of the rotational movement direction of the moving portion 9 collides with the vertical groove end wall 10A which serves as the rotation stop collision portion 10 on the first lateral groove portion 21B side and the vertical groove end wall 10B which serves as the rotation stop collision portion 10 on the second lateral groove portion 21C side). The width (along the circumferential direction of the inner plug main body portion 14) of the vertical groove portion 21A, the groove length (along the circumferential direction of the inner plug main body portion 14) of the first lateral groove portion 21B, and the groove length (along the circumferential direction of the inner plug main body portion 14) of the second lateral groove portion 21C are set and configured so that the horizontal rotation of the outer lid portion 4 relative to the inner plug portion 3 is within a rotation range of 90 degrees or less (approximately 30 to 40 degrees in this embodiment).

[0041] The outer lid portion 4 is configured so that when the moving part 9 collides with the rotation stopper collision part 10A of the first lateral groove portion 21B by rotating the outer lid portion 4 relative to the inner plug portion 3 in a direction that screws the stopper body S into the upper opening 2 of the container body 1, the sealing member 6 seals the vent hole 5 (see Figure 5). At the same time, the outer lid portion 4 is configured so that when the moving part 9 collides with the rotation stopper collision part 10B of the second lateral groove portion 21C by rotating the outer lid portion 4 relative to the inner plug portion 3 in a direction that screws the stopper body S out of the upper opening 2 of the container body 1, the sealing member 6 disengages from the vent hole 5 to open the vent hole 5 (see Figure 6). The operation of opening and closing the vent hole 5 (forward / reverse rotation of the outer lid portion 4) can be easily performed by a very small rotation operation of the outer lid portion 4 of 90 degrees or less (about 30 to 40 degrees in this embodiment).

[0042] In addition, the plug interlocking mechanism 8 is configured such that when the outer lid portion 4 is rotated horizontally even after the moving portion 9 collides with the rotation stopper collision portion 10, the rotational force applied to the outer lid portion 4 is transmitted to the inner plug main body portion 14 (inner plug portion 3) via the moving portion 9 in the colliding state and the rotation stopper collision portion 10, causing the inner plug portion 3 to rotate in unison.

[0043] That is, when the outer lid portion 4 is rotated in the plug body S screwing direction (clockwise) to cause the end portion on the tip side in the rotation direction of the moving portion 9 to collide with the rotation stopper collision portion 10A (vertical groove end wall) of the first horizontal groove portion 21B (when the vent hole 5 is sealed with the sealing member 6), the inner plug main body portion 14 (inner plug portion 3) is also configured to rotate in the plug body S screwing direction by further rotating the outer lid portion 4 in the clockwise direction, whereby the male thread portion 13 of the inner plug main body portion 14 is screwed into the female thread portion 12 of the upper opening 2 and the inner plug portion 3 (plug body S) is attached to the upper opening 2 of the container body 1 (the beverage leakage prevention packing 16 is pressed against the inner circumferential surface in the vicinity of the upper opening 2), and the outer lid portion 4 is screwed against the inner plug portion 3 from the plug body S screwed-attached state in which the beverage leakage prevention packing 16 is pressed against the upper opening 2, so that the plug S can be unscrewed from the upper opening 2 relative to the inner plug portion 3. When the outer lid portion 4 is rotated in the direction in which the inner plug portion 3 is screwed down (counterclockwise), the frictional force of the pressure of the beverage leakage prevention gasket 16 against the upper opening 2 causes only the outer lid portion 4 to rotate relative to the inner plug portion 3 without causing the inner plug portion 3 to rotate, and the sealing member 6 is released from the vent hole 5 (the internal pressure inside the container body 1 is discharged), and when the moving portion 9 passes over the vertical groove portion 21A and is caused to collide with the rotation stopper collision portion 10B (vertical groove end wall) of the second horizontal groove portion 21C, by further rotating the outer lid portion 4 counterclockwise, the inner plug main body portion 14 (inner plug portion 3) is also configured to rotate in conjunction with the plug S in the direction in which the plug S is unscrewed, so that the inner plug main body portion 14 rotates against the frictional force of the pressure of the beverage leakage prevention gasket 16, and the male thread portion 13 is unscrewed from the female thread portion 12 of the upper opening 2, and the plug S together with the inner plug portion 3 is removed from the upper opening 2 of the container body 1.

[0044] In addition, a temporary locking protrusion 22 protrudes inward near the rotation stop collision portion 10A of each first horizontal groove portion 21B (see Figures 5 and 7). Meanwhile, a temporary engagement recess 23 with which the temporary locking protrusion 22 can engage is provided on the outer circumferential edge near the tip end of each moving portion 9 in the screw-engagement rotation direction (see Figures 4 and 5). When each moving portion 9 collides with the rotation stop collision portion 10A of each first horizontal groove portion 21B, the temporary locking protrusion 22 simultaneously engages and locks into the temporary engagement recess 23 (see Figure 5). In other words, when the outer lid portion 4 is rotated in the screwing direction, when the moving portion 9 collides with the rotation stop collision portion 10A of each first horizontal groove portion 21B, the sealing member 6 seals the vent hole 5 to create a sealed state to prevent beverage leakage, and this sealed state to prevent beverage leakage is maintained in a temporary fastening state (a state in which beverage does not leak from the vent hole 5) that is not easily released by the concave-convex engagement between the temporary locking convex portion 22 and the temporary engagement concave portion 23.

[0045] Furthermore, the temporary locking convex portion 22 and the temporary engagement concave portion 23 are configured with concave and convex shapes etc. so that the locking strength of the concave and convex portions is weaker than the frictional force of the pressure contact with the upper opening 2 of the beverage leakage prevention gasket 16, and when the outer lid portion 4 is rotated in the unscrewing direction to open the stopper body S, the temporary engagement concave portion 23 of the outer lid portion 4 disengages from the temporary locking convex portion 22 of the inner stopper portion 3, which is prevented from rotating by the frictional force of the pressure contact with the beverage leakage prevention gasket 16, and the outer lid portion 4 rotates in the unscrewing direction relative to the inner stopper portion 3 (the sealing member 6 moves out of the vent hole 5, opening the vent hole 5 (discharging the internal pressure within the container body 1)), and then the inner stopper portion 3 (stopper body S) is rotated in the unscrewing direction by the stopper interlocking mechanism portion 8.

[0046] In addition, the rotation restriction mechanism 7 in this embodiment has a plug separation mechanism 11 that makes it impossible to separate the outer cap portion 4 from the inner plug portion 3 when the rotation of the outer cap portion 4 relative to the inner plug portion 3 is restricted when the moving part 9 has collided with the rotation stopper collision part 10, and that makes it possible to separate the outer cap portion 4 from the inner plug portion 3 when the outer cap portion 4 is in the middle of rotation relative to the inner plug portion 3 when the moving part 9 has not collided with the rotation stopper collision part 10.The plug separation mechanism 11 separates the outer cap portion 4 from the inner plug portion 3, allowing both the outer cap portion 4 and the inner plug portion 3 to be washed separately, and maintaining the plug body S in a hygienic state.

[0047] Specifically, the plug separation mechanism 11 is composed of the mounting groove 21 formed in an inverted T-shape and the moving part 9 that engages with the mounting groove 21, and has two states: a rotation restricted state of the outer lid part 4 in which the moving part 9 (all of it) is present in the first lateral groove part 21B of the mounting groove 21 and is in collision with the rotation stop collision part 10A of the first lateral groove part 21B, and a rotation restricted state of the outer lid part 4 in which a part of the moving part 9 is present in the second lateral groove part 21C of the mounting groove 21 and is in collision with the rotation stop collision part 10B of the second lateral groove part 21C. In the restricted state, the outer lid portion 4 is prevented from slipping out upward from the inner plug portion 3, making it impossible to separate the outer lid portion 4 from the inner plug portion 3. When the outer lid portion 4 is in the middle of rotating state after the moving part 9 has been moved from the first horizontal groove portion 21B to the vertical groove portion 21A or from the second horizontal groove portion 21C to the vertical groove portion 21A, the moving part 9 (outer lid portion 4) can be moved upward and removed along the vertical groove portion 21A as shown by the arrow in Figure 7, so that the outer lid portion 4 can be separated (removed) from the inner plug portion 3 (see Figure 7).

[0048] Therefore, when the user is applying a rotational force to the outer lid portion 4 to screw or unscrew the stopper S, the outer lid portion 4 is unlikely to come off from the inner stopper portion 3 (so as to prevent interference with the rotation operation of the stopper S for the purpose of screwing or unscrewing), and the outer lid portion 4 is configured to be in a mid-rotation state relative to the inner stopper portion 3 so that the inner stopper portion 3 and the outer lid portion 4 can be separated only when the user intentionally wants to disassemble the stopper S, such as during cleaning. EXAMPLES

[0049] A second specific embodiment of the present invention will be described with reference to FIG.

[0050] In this embodiment, the configurations of the outer lid portion 4 and the inner plug portion 3 are different from those in the first embodiment.

[0051] Specifically, the seal member 6 is provided on the disk-shaped bottom of the outer plug portion 17 of the outer lid portion 4 as in the first embodiment, but in this embodiment, the mounting holes 20 are formed through the disk-shaped bottom of the outer plug portion 17 of the outer lid portion 4 at positions eccentric to the rotation center of the outer lid portion 4, and at two symmetrical positions symmetrically about the rotation center of the outer lid portion 4, and the seal member 6 is attached to each of the two mounting holes 20. That is, in this embodiment, the seal members 6 are provided on two positions on the disk-shaped bottom of the outer plug portion 17 of the outer lid portion 4.

[0052] The sealing members 6 are provided in two locations so that the outer lid portion 4 can be easily attached to the inner plug portion 3 without having to worry about the positional relationship between the sealing members 6 and the vent hole 5, and this makes it easy to assemble the plug body S (attaching the outer lid portion 4 to the inner plug portion 3).

[0053] In other words, in the case of a configuration in which the sealing member 6 is provided in only one location as in Example 1, the rotation range of the outer lid portion 4 relative to the inner plug portion 3 is restricted by the rotation restriction mechanism 7, so that when the outer lid portion 4 is attached to the inner plug portion 3, if the positional relationship between the sealing member 6 and the vent hole 5 is incorrect (if the outer lid portion 4 is not attached to the inner plug portion 3 in a positional relationship where the rotational movement trajectory of the sealing member 6 matches the vent hole 5), the sealing member 6 will not be able to seal the vent hole 5. Therefore, in order to prevent such assembly errors, it was necessary to make the shapes of the moving parts 9 located at the opposing positions (for example, the length and width along the direction of rotational movement) different from each other, and to make the shapes of the vertical groove parts 21A of the mounting groove 21 located at the opposing positions (for example, the opening width of the upper opening part of the vertical groove parts 21A) different from each other in correspondence with these shapes, so that if the positional relationship between the seal member 6 and the vent hole 5 is not correct, the moving part 9 cannot be engaged with the mounting groove 21 (vertical groove parts 21A). However, according to this embodiment, the positional relationship between the seal member 6 and the vent hole 5 can be adjusted without causing any problem. Since the embodiment is configured so that even if the outer cap portion 4 is attached to the inner plug portion 3 without using either of the two sealing members 6, the vent hole 5 can be sealed (the positional relationship between the two sealing members 6 and the moving portion 9 is set), the assembly work of the plug body S can be performed more easily than in the first embodiment, and there is no need to devise ways to make the shapes of the moving portions 9 and the shapes of the mounting grooves 21 (vertical groove portions 21A) different. In this embodiment, the shapes of the moving portions 9 located in opposing positions are formed to be the same as each other, and the shapes of the vertical groove portions 21A of the mounting grooves 21 located in opposing positions are also formed to be the same as each other.

[0054] In addition, each of the moving parts 9 in this embodiment is provided with the provisional engagement recesses 23 on the outer circumferential edges near both ends in the rotation direction (two locations: the outer circumferential edge near the tip in the screw-in rotation direction and the outer circumferential edge near the tip in the screw-out rotation direction). Meanwhile, the inner plug part 3 in this embodiment is provided with the provisional engagement recesses 23 on the outer circumferential edges near the rotation stop collision parts (vertical groove end walls) 10A of the first lateral groove parts 21B of the inner plug main body 14 and the rotation stop collision parts (vertical groove end walls) 10B of the second lateral groove parts 21C. A temporary locking protrusion 22 protrudes inward near the groove end wall 10B, and is configured so that when each moving part 9 collides with the rotation stop collision portion 10A of each first lateral groove portion 21B, the temporary locking protrusion 22 simultaneously engages and locks into the temporary engagement recess 23, and also when each moving part 9 collides with the rotation stop collision portion 10B of each second lateral groove portion 21C, the temporary locking protrusion 22 simultaneously engages and locks into the temporary engagement recess 23.

[0055] That is, when the outer lid portion 4 is rotated in the screwing direction, the seal member 6 seals the vent hole 5 to prevent beverage leakage when the moving portion 9 collides with the rotation stop collision portion 10A of each of the first horizontal groove portions 21B, but this sealed state to prevent beverage leakage is maintained in a temporary fastening state (a state in which beverage does not leak from the vent hole 5) that is not easily released by the concave-convex engagement between the temporary fastening convex portion 22 and the temporary engagement concave portion 23. Conversely, when the outer lid portion 4 is rotated in the screwing direction, the vent hole 5 is opened, but when the moving portion 9 collides with the rotation stop collision portion 10B of each of the second horizontal groove portions 21C, the temporary fastening state is maintained in a temporary fastening state (a state in which beverage does not leak from the vent hole 5) that is not easily released by the concave-convex engagement between the temporary fastening convex portion 22 and the temporary engagement concave portion 23. The recessed and recessed engagement between the retaining protrusions 22 and the temporary engagement recesses 23 maintains the open state of the vent hole 5 in a temporary fixed state that is not easily released (this temporary fixed open state of the vent hole 5 is configured such that when the outer lid portion 4 is rotated in the screwing direction so that the beverage leakage prevention gasket 16 of the inner plug portion 3 comes into close contact with the inner surface near the upper opening 2 of the container body 1, the inner plug portion 3 is prevented from rotating due to the pressure friction force, and the temporary engagement recesses 23 of the outer lid portion 4 engage and disengage with the temporary locking protrusions 22 of the inner plug portion 3, and as a result the outer lid portion 4 rotates in the screwing direction relative to the inner plug portion 3, making it possible to seal the vent hole 5 with the sealing member 6).

[0056] The other configurations are the same as those in the first embodiment.

[0057] Incidentally, the present invention is not limited to the first and second embodiments, and the specific configuration of each component can be designed as appropriate. [Explanation of symbols]

[0058] 1 Container body 2 Upper opening 3 Internal plug part 4 Outer lid part 5 Ventilator 6 Sealing material 7 Rotation restriction mechanism 8. Valve interlocking mechanism 9. Moving Part 10 Anti-rotation collision part 11 Plug separation mechanism section 12 Female thread 13 Male thread S plug body

Claims

1. A stopper for a beverage container that can be detachably attached to an upper opening of a container body by rotating and screwing the stopper, The plug comprises an inner plug portion that is inserted into an upper opening of the container body to seal the upper opening, and an outer lid portion for opening and closing the plug, the outer lid portion being rotatably attached to the inner plug portion so as to cover the outside of the inner plug portion, the inner plug portion is provided with a vent hole that communicates between the outside of the inner plug portion and the inside of the container body when the inner plug portion closes the upper opening, and the vent hole is provided at a position eccentric to the rotation center of the inner plug portion; The outer lid portion is provided with a seal member that seals the vent hole, and the seal member is provided at a position eccentric to the rotation center of the outer lid portion, When the outer lid portion is rotated relative to the inner plug portion in a direction in which the plug body is screwed into the upper opening of the container body, the sealing member moves toward the vent hole, which is then sealed, and when the outer lid portion is rotated relative to the inner plug portion from the sealed state of the vent hole in a direction in which the plug body is unscrewed from the upper opening of the container body, the sealing member moves out of the vent hole, which opens the vent hole. The stopper is equipped with a rotation limiting mechanism which limits the rotation range of the outer lid portion relative to the inner stopper portion to a rotation angle of 90 degrees or less, and is configured so that by rotating the outer lid portion within the rotation range limited by this rotation limiting mechanism, a state in which the vent hole is sealed by the sealing member and a state in which the sealing member detaches from the vent hole and the vent hole is open, and the rotation limiting mechanism has a stopper interlocking mechanism which rotates the inner stopper portion in conjunction with the outer lid portion when the outer lid portion exceeds the rotation range limited by this rotation limiting mechanism, and is configured so that the outer lid portion and the inner stopper portion rotate in conjunction with each other via this stopper interlocking mechanism, thereby screwing the stopper into or out of the upper opening of the container body.

2. The rotation restriction mechanism includes: The outer lid portion is provided with a moving part that rotates in accordance with the rotation of the outer lid portion, and a rotation stopper collision part against which the rotating moving part collides is provided on the inner plug portion, and the rotation of the outer lid portion relative to the inner plug portion is restricted by the moving part colliding with the rotation stopper collision part, The plug interlocking mechanism is The stopper for a beverage container as described in claim 1, characterized in that when the outer lid portion is rotated even after the moving part collides with the rotation stopper collision part, the rotational force applied to the outer lid portion is transmitted to the inner stopper portion via the moving part in a colliding state and the rotation stopper collision part, causing the inner stopper portion to rotate in conjunction.

3. The rotation restriction mechanism includes: The stopper of a beverage container as described in claim 2, characterized in that it has a stopper separation mechanism that makes it impossible to separate the outer lid portion and the inner stopper portion when the outer lid portion is in a rotation-restricted state relative to the inner stopper portion after the moving part has collided with the rotation-stop collision part, and that makes it possible to separate the outer lid portion and the inner stopper portion when the outer lid portion is in the middle of rotation relative to the inner stopper portion and has not collided with the rotation-stop collision part.

4. The stopper for a beverage container as described in claim 1, characterized in that the stopper has a male threaded portion on the inner stopper portion, and the stopper is removably attached to the upper opening of the container body by screwing this male threaded portion into a female threaded portion on the upper opening of the container body.

5. A beverage container comprising a container body and a stopper according to any one of claims 1 to 4, which is detachably attached to an upper opening of the container body by means of a rotational screw engagement.

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