Plug and beverage container

Abstract

To provide a plug body and a beverage container that can maintain a sealed state more easily than conventional plug bodies even when a relatively high pressure is generated inside the beverage container. A plug body (100) of the present invention has (a) a drinking port (120a), (b) a plug (143) having an embedded portion (143b) and being detachably embedded into the inside of the drinking port, and (c) a ring-shaped sealing member (PK5) installed on the lower side of the embedded portion of the plug, which forms a sealed state by abutting against a portion (120c) on the lower side of the drinking port when the plug is inserted.

Description

TECHNICAL FIELD

[0001] The present application relates to a plug. Further, the present application relates to a beverage container equipped with the plug. BACKGROUND

[0002] In the past, a "plug for a beverage container, having: a synthetic resin-made cylinder body, screwably and detachably provided to an inner thread portion of an inner peripheral wall of an opening portion of a container body, protruding more upward than the opening portion of the container body; and a synthetic resin-made cap body, screwably and detachably provided to an upper portion of the cylinder body, opening and closing the opening portion of the cylinder body, and the cylinder body including: a main body portion, screwably provided to an inner thread portion of an inner container of the container body; a shoulder portion, continuous with an upper portion of the main body portion, protruding more upward than the opening portion of the container body; and a head portion, continuous with an upper portion of the shoulder portion, an outer thread portion for screwably mounting the cap body being provided to an outer periphery of a lower side of the head portion, the cap body having an inner thread portion, screwably engaging with the outer thread portion of the cylinder body, provided to an inner periphery of a lower side of a peripheral wall, and an upper end of the head portion being closed by the cap body via a sealing member" (for example, refer to Japanese Patent Laid-Open No. 2002-68227 and the like) has been proposed.

[0003] [Related Art Documents]

[0004] [Patent Documents]

[0005] [Patent Document 1] Japanese Patent Laid-Open No. 2002-68227 SUMMARY

[0006] [Problems to be Solved by the Invention]

[0007] Further, in the beverage container equipped with the plug as described above, the sealing portion is positioned above an outer side of the screwing portion. Therefore, in a case where a relatively high pressure is generated inside the beverage container, there is a possibility that the cap body, which is a plugging member, is deformed, and the sealed structure is not maintained.

[0008] The present application has an object to provide a plug that is more likely to maintain a sealed structure than a conventional plug, even in a case where a relatively high pressure is generated inside a beverage container.

[0009] [Means of Solving the Problems]

[0010] The plug of the present application includes:

[0011] a drinking port;

[0012] a plug having an insertion portion that is inserted and detached to an inner side of the drinking port; and

[0013] a ring-shaped sealing member that is mounted to a lower side of the insertion portion of the plug,

[0014] The sealing member forms a seal against a portion of the lower side of the drink port when the plug is inserted.

[0015] According to the structure, the sealing portion is below the inside of the fitting portion. Therefore, even if a relatively high pressure is generated inside the beverage container in a state in which the plug body is attached to the beverage container, the seal is more easily maintained than in the case of a conventional plug body.

[0016] The plug body of the present application preferably has:

[0017] The drink port has a cylindrical shape.

[0018] A portion of the lower side of the drink port has an annular shape extending from the inner wall toward the cylinder axis.

[0019] According to the structure, the sealing surface can be widened.

[0020] The plug body of the present application preferably has:

[0021] The fitting portion is an external thread formed on the outer periphery of the plug,

[0022] The drink port has a cylindrical body and an internal thread formed on the inside of the cylindrical body and screwable with the external thread,

[0023] In a cross-sectional view taken along a plane including the cylinder axis of the cylindrical body, the angle of the upper surface of the external thread with respect to a plane orthogonal to the cylinder axis is greater than the angle of the lower surface of the external thread with respect to the plane orthogonal to the cylinder axis, and the upper surface and the lower surface of the internal thread are in a substantially parallel relationship with the lower surface and the upper surface of the external thread.

[0024] According to the structure, the pressure resistance of the external thread can be improved.

[0025] The plug body of the present application preferably has:

[0026] The external thread is not turned to the sealing position,

[0027] The internal thread is turned to the sealing position.

[0028] According to the structure, a gap of the order of the screw valley can be formed between the lower portion of the drink port and the plug. Therefore, when gas in the beverage container attempts to flow out of the beverage container through the inside of the drink port upon opening of the plug, the gas not only flows upward but also flows into the gap, thereby dispersing the pressure in the drink port. As a result, the plug can be prevented from flying out or making a noise upon opening of the plug.

[0029] The beverage container of the present application includes:

[0030] The plug body; and

[0031] A bottomed cylindrical container for mounting the plug body.

[0032] According to the structure, the sealing site becomes the inner side below the fitting site. Therefore, even in the case where a relatively high pressure is generated inside the beverage container, the sealing structure is more easily maintained than in the conventional plug body. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 A perspective view of a beverage container according to an embodiment of the present application. In addition, the outlet port of the cylindrical wall portion in this figure is plugged by a plug.

[0034] Figure 2 A perspective view of a beverage container according to an embodiment of the present application. In addition, the outlet port of the cylindrical wall portion in this figure is not plugged by a plug.

[0035] Figure 3 A plan view of a beverage container according to an embodiment of the present application. In addition, the outlet port of the cylindrical wall portion in this figure is plugged by a plug.

[0036] Figure 4 A plan view of a beverage container according to an embodiment of the present application. In addition, the outlet port of the cylindrical wall portion in this figure is not plugged by a plug. Figure 3 A cross-sectional view of A-A in Fig. 8. In addition, a part of the drawing of the vacuum double-layered container is omitted, and a state in which the pressure adjusting mechanism is not acting is shown.

[0037] Figure 5 A cross-sectional view of A-A in Fig. 8. In addition, a part of the drawing of the vacuum double-layered container is omitted, and a state in which the pressure adjusting mechanism is not acting is shown. Figure 3 A cross-sectional view of A-A in Fig. 8. In addition, a part of the drawing of the vacuum double-layered container is omitted, and a state in which the pressure adjusting mechanism is not acting is shown.

[0038] Figure 6 An enlarged cross-sectional view of the vicinity of the pressure adjusting mechanism according to an embodiment of the present application. In addition, a state in which the pressure adjusting mechanism is acting is shown.

[0039] Figure 7 A view of an example of a beverage container when it is turned upside down according to an embodiment of the present application. In addition, the beverage container is cut at a height position slightly lower than the step portion of the inner cylinder in a state in which the plug is not acting. Figure 1 A view of an example of a beverage container when it is turned upside down according to an embodiment of the present application. In addition, the beverage container is cut at a height position slightly lower than the step portion of the inner cylinder in a state in which the plug is not acting.

[0040] Figure 8 A lower perspective view of a plug according to an embodiment of the present application.

[0041] Figure 9 An enlarged cross-sectional view of the inner threaded portion of the cylindrical wall portion and the outer threaded portion of the plug according to an embodiment of the present application. Figure 4 An enlarged cross-sectional view of the inner threaded portion of the cylindrical wall portion and the outer threaded portion of the plug according to an embodiment of the present application.

[0042] [Explanation of Symbols]

[0043] 10: Beverage container

[0044] 100: plug body

[0045] 120a: upper side wall portion (drinking port portion, cylindrical body)

[0046] 120g: internally threaded portion

[0047] 120c: eave portion (portion on the lower side of the drinking port portion)

[0048] 143: plug body portion (plug)

[0049] 143b: externally threaded portion (fitting portion)

[0050] 200: vacuum double-layered container (container)

[0051] AY: cylinder axis (cylinder axis)

[0052] LS1: lower surface of externally threaded portion

[0053] LS2: lower surface of internally threaded portion

[0054] PK5: fifth gasket (sealing member)

[0055] SF1: surface (surface orthogonal to cylinder axis)

[0056] US1: upper surface of externally threaded portion

[0057] US2: upper surface of internally threaded portion

[0058] θ1: angle (angle of upper surface with respect to surface orthogonal to cylinder axis)

[0059] θ2: angle (angle of lower surface with respect to surface orthogonal to cylinder axis) DETAILED DESCRIPTION

[0060] Structure of Beverage Container of Embodiment of the Invention

[0061] The beverage container 10 of the embodiment of the invention, as shown in Figure 1 , Figure 2 , Figure 4 and Figure 5 , includes a vacuum double-layered container 200, a plug body 100, a second gasket PK2, and a strap 300. Hereinafter, these structural elements are described in detail. Furthermore, the beverage container 10 is assembled by mounting the plug body 100 to the vacuum double-layered container 200.

[0062] 1. Vacuum Double-Layered Container

[0063] The vacuum double-layered container 200 is a container made of metal such as stainless steel, and as shown in Figure 1 , Figure 2 , Figure 4and Figure 5 As shown, it is mainly formed by an inner cylinder 210 and an outer cylinder 220. Specifically, as... Figures 4-6 As shown, after the upper end of the top wall portion 214 (described later) of the inner cylinder 210 and the upper end of the top wall portion 224 (described later) of the outer cylinder 220 are joined in such a way that an insulating space is formed between the inner cylinder 210 and the outer cylinder 220, the insulating space is set to a vacuum state, thereby forming a vacuum double-layer container 200.

[0064] Inner cylinder 210 Figures 4-6 As shown, it is mainly formed by an inner cylinder sidewall portion 211, an inner cylinder bottom wall portion (not shown), a stepped portion 213, a top wall portion 214, and an internal thread portion 215. The inner cylinder sidewall portion 211 is generally cylindrical. The central portion of the inner cylinder bottom wall portion arches spherically towards the opening side (upper side), and the corners are concave arc-shaped. In addition, the inner cylinder bottom wall portion is formed on the lower side of the inner cylinder sidewall portion 211. The stepped portion 213 is a portion with a cut-off conical cylinder shape (frustum conical cylinder shape), and as shown... Figure 4 , Figure 5 and Figure 7 As shown, a portion 211 is formed between the inner cylinder sidewall portion 211 and the top wall portion 214, connecting the inner cylinder sidewall portion 211 and the top wall portion 214. The top wall portion 214 is generally cylindrical in shape, as shown... Figures 4-6 As shown, it extends upward from the upper end of the stepped portion 213. The internal thread portion 215 is as follows... Figures 4-6 As shown, the inner circumferential surface of the top wall portion 214 can be screwed into the external thread portion 120h (described later) of the cylindrical wall portion 120 of the plug body 100.

[0065] Outer tube 220 Figure 1 , Figure 2 , Figures 4-6 As shown, it is mainly formed by an outer cylinder sidewall portion 221, an outer cylinder bottom wall portion 222, a stepped portion 223, and a top wall portion 224. The outer cylinder sidewall portion 221, like the inner cylinder sidewall portion 211, is generally cylindrical. The outer cylinder bottom wall portion 222 is generally disc-shaped, as shown... Figure 1 and Figure 2 As shown, it is the lower end portion that joins to the side wall portion 221 of the outer cylinder. The stepped portion 223 is a portion with a cut-off conical cylinder shape (frustum conical cylinder shape), and as... Figures 4-6 As shown, it is formed between the outer cylinder sidewall portion 221 and the top wall portion 224, connecting the outer cylinder sidewall portion 221 and the top wall portion 224. The top wall portion 224 is generally cylindrical in shape, as shown... Figures 4-6 As shown, it extends upward from the upper end of the step 223.

[0066] In addition, such as Figures 4-6 As shown, a second washer PK2 (described later) is installed in the recess formed by the step portion 223 and the top wall portion 224.

[0067] 2. Plug body

[0068] The plug body 100, as shown in Figures 1-5 , mainly includes a shoulder member 110, a cylindrical wall portion 120, a pressure adjusting mechanism 130, and a plug 140. Hereinafter, these structural elements are described in detail.

[0069] (1) Shoulder member

[0070] The shoulder member 110 is a member formed of resin or the like, and, as shown in Figures 1-6 , covers the pressure adjusting mechanism 130, and mainly includes an outer shoulder member 111 and an inner shoulder member 112. Hereinafter, these structural elements are described in detail.

[0071] (1-1) Outer shoulder member

[0072] The outer shoulder member 111, as shown in Figures 1-6 , is mainly formed of a top wall portion 111a, a step portion 111b, a side wall portion 111c, and a claw portion 111d. The top wall portion 111a is a substantially disc-shaped portion constituting an upper wall of the outer shoulder member 111, and, as shown in Figure 2 , Figures 4-6 , Figure 9 , a circular opening 111o is formed in a central portion thereof. Further, as shown in Figure 4 and Figure 9 , the upper side wall portion 120a of the cylindrical wall portion 120 is inserted through the opening 111o.

[0073] The step portion 111b, as shown in Figures 1-6 , is formed between the top wall portion 111a and the side wall portion 111c, and connects the top wall portion 111a and the side wall portion 111c. The side wall portion 111c is in a substantially cylindrical shape, and, as shown in Figure 1 , Figure 2 , Figures 4-6 , extends downward from a lower end portion of the step portion 111b to an upper end position of a recessed portion 112p of the side wall portion 112c of the inner shoulder member 112. The claw portion 111d, as shown in Figures 4-6 , Figure 9 , is a protruding portion extending downward from an inner edge portion (i.e., a circumferential portion of the opening 111o) of the top wall portion 111a, and holds the first gasket PK1 (described later) in cooperation with a top wall portion 112a (described later) of the inner shoulder member 112.

[0074] (1-2) Inner shoulder member

[0075] The inner shoulder member 112, as shown in Figures 4-6 , is mainly formed of a top wall portion 112a, a step portion 112b, and a side wall portion 112c. The top wall portion 112a is a substantially disc-shaped portion constituting an upper wall of the inner shoulder member 112, and, as shown in Figures 4-6 ,Figure 9 As shown, a circular opening 112o is formed in the central part. Furthermore, as... Figure 4 and Figure 9 As shown, the upper sidewall portion 120a of the cylindrical wall portion 120 is inserted through the opening 112o. Furthermore, as... Figures 4-6 As shown, the diameter of opening 112o is slightly larger than the diameter of opening 111o of the outer shoulder member 111, and the area of ​​opening 112o overlaps with the entire area of ​​opening 111o of the outer shoulder member 111 in planar perspective. Furthermore, in top view, the center of opening 112o is located at the same position as the center of opening 111o of the outer shoulder member 111. Step 112b is as follows... Figures 4-6 As shown, it is formed between the top wall portion 112a and the side wall portion 112c, connecting the top wall portion 112a and the side wall portion 112c. The side wall portion 112c is generally cylindrical in shape, as shown... Figures 4-6 As shown, it extends downward from the lower end of the step 112b. Furthermore, as... Figures 4-6 As shown, an inwardly recessed annular portion 112p is formed from the lower part to the middle part of the sidewall portion 112c. A large circular annular portion 302 of the strip 300 (described later) is embedded in this recess 112p.

[0076] (2) Cylindrical wall

[0077] The cylindrical wall portion 120 is a component formed of resin or the like, and as... Figure 2 , Figures 4-6 As shown, a portion of it protrudes upward through the opening 111o of the outer shoulder member 111 and the opening 112o of the inner shoulder member 112, and is mainly formed by the upper side wall portion 120a, the lower side wall portion 120b, the eaves portion 120c, the upper receiving wall portion 120d, the lower receiving wall portion 120e, the front receiving wall portion 120f, the internal thread portion 120g, the external thread portion 120h, and the third washer mounting wall portion 120i. Furthermore, as... Figures 4-6 As shown, a first washer PK1 and a third washer PK3 are installed on the cylindrical wall portion 120. The upper side wall portion 120a is generally cylindrical in shape. Furthermore, as... Figure 2 , Figure 4 , Figure 5 and Figure 9 As shown, an internally threaded portion 120g is formed from the lower part to the middle part of the inner circumferential surface of the upper sidewall portion 120a. Furthermore, as... Figure 2 and Figure 5 As shown, the internal spaces SP1 and SP2 (described later) of the upper sidewall portion 120a together function as a beverage passage, and the opening on the upper side of the upper sidewall portion 120a serves as the beverage outlet MO, thus the upper sidewall portion 120a functions as a drinking spout. The lower sidewall portion 120b is generally cylindrical in shape. Furthermore, as... Figure 4 andFigure 5 As shown, an external thread portion 120h is formed in the lower side wall portion 120b from the lower portion to the intermediate portion of the outer peripheral surface. Also, as shown in Figure 4 Figure 6 As shown, a notch is formed in the upper end portion of the rear side of the lower side wall portion 120b, and an upper side housing wall portion 120d is disposed on the upper side of the notch to form an opening OP3. The eave portion 120c is formed in the upper side of the lower side wall portion 120b as shown in Figures 4-6 Figure 9 As shown, the eave portion 120c extends outward and inward (tubular axis AY of the upper side wall portion 120a) from the boundary portion of the upper side wall portion 120a and the lower side wall portion 120b to have a substantially circular ring shape. In addition, the outer side portion of the eave portion 120c supports the top wall portion 112a of the inner side shoulder member 112, and the inner side portion functions as a sealing portion of the plug 140. Further, the tubular axis AY of the upper side wall portion 120a is an imaginary line extending in the vertical direction from the center of the upper side wall portion 120a in plan view (see Figures 3-5 ). The upper side housing wall portion 120d has a substantially disc shape, and is formed in the upper side of the rear portion of the lower side wall portion 120b as shown in Figures 4-6 . Further, as shown in Figures 4-6 , an opening OP1 is formed in the central portion of the upper side housing wall portion 120d. The lower side housing wall portion 120e has a substantially disc shape, and is formed in the lower side of the rear portion of the lower side wall portion 120b as shown in Figures 4-6 . Further, as shown in Figures 4-6 , an opening OP2 is formed in the central portion of the lower side housing wall portion 120e. The front side housing wall portion 120f has a partial circular shape in plan view, and extends upward from the front edge portion of the lower side housing wall portion 120e as shown in Figures 4-6 . Here, as shown in Figures 4-6 , a cylindrical portion having an internal space SP3 is formed by the lower side wall portion 120b, the upper side housing wall portion 120d, the lower side housing wall portion 120e, and the front side housing wall portion 120f. The internal space SP3 extends in the vertical direction as shown in Figures 4-6 . Further, in the internal space SP3, a pressure adjustment mechanism 130 (described later) is disposed as shown in Figure 4 . The internal thread portion 120g is screwable with the external thread portion 143b (described later) of the plug 140, and is formed from the lower portion to the intermediate portion of the inner peripheral surface of the upper side wall portion 120a as described above. That is, the internal thread portion 120g is turned to a position at which the fifth gasket PK5 of the plug 140 and the inner side portion of the eave portion 120c abut in the case of being screwed with the external thread portion 143b of the plug 140 (see Figure 9 Figures 4-6 ​​​). The outer thread portion 120h is formed from the lower portion of the outer peripheral surface of the lower side side wall portion 120b to the middle portion as described above, and can be screwed with the inner thread portion 215 of the inner cylinder 210. The third gasket mounting wall portion 120i is formed in a substantially cylindrical shape as shown in Figures 4-6 , on the lower side of the lower side side wall portion 120b. Further, as shown in Figures 4-6 , an internal space SP2 is formed by the lower side side wall portion 120b, the lower side housing wall portion 120e, the front side housing wall portion 120f, and the third gasket mounting wall portion 120i. The internal space SP2 functions as a beverage passage together with the internal space SP1 of the upper side side wall portion 120a, and functions as a space for storing air on the upper side of the beverage when the plug body 100 is mounted to the vacuum double-layered container 200 and the beverage is injected into the vacuum double-layered container 200. The first gasket PK1 is a ring-shaped member formed of an elastic material such as rubber or an elastomer, and is mounted to the lower portion of the outer peripheral surface of the upper side side wall portion 120a of the cylindrical wall portion 120 as shown in Figure 9 , Figures 4-7 . Further, as described above, the first gasket PK1 is sandwiched by the claw portion 111d of the outer side shoulder member 111 of the shoulder member 110 and the top wall portion 112a of the inner side shoulder member 112 of the shoulder member 110. Here, the first gasket PK1 functions to block the gap between the outer side shoulder member 111 of the shoulder member 110 and the upper side side wall portion 120a of the cylindrical wall portion 120, and the gap between the inner side shoulder member 112 of the shoulder member 110 and the upper side side wall portion 120a of the cylindrical wall portion 120. The third gasket PK3 is a ring-shaped member formed of an elastic material such as rubber or an elastomer, and is mounted to the outer peripheral surface of the third gasket mounting wall portion 120i as shown in Figure 4 . Here, in the case where the outer thread portion 120h is screwed with the inner thread portion 215 of the inner cylinder 210 of the vacuum double-layered container 200, the third gasket PK3 abuts against the upper end portion of the step portion 213 of the inner cylinder 210 as shown in Figure 5 and Figures 4-6 . At this time, the third gasket PK3 functions to block the gap between the cylindrical wall portion 120 and the inner cylinder 210.

[0078] (3) Pressure adjustment mechanism

[0079] The pressure adjustment mechanism 130 is a member for adjusting the internal pressure of the beverage container 10, and is provided in the internal space SP3 of the cylindrical wall portion 120 as shown in Figures 4-6 , and mainly includes a valve body 131, a biasing member 132, and a fourth gasket PK4. Hereinafter, these structural elements will be described in detail.

[0080] (3-1) Valve body

[0081] The valve body 131 is formed in a substantially cylindrical shape as shown in Figures 4-6As shown, the valve body 131 is mainly formed of a valve stem 131a and a valve portion 131b. The valve stem 131a is a substantially cylindrical member extending in the up-down direction, as shown. Here, the valve stem 131a is inserted into the inside of the force applying member 132, and the upper end portion of the valve stem 131a is inserted into the opening OP1 of the upper side housing wall portion 120d of the cylindrical wall portion 120. On the other hand, the lower end portion of the valve stem 131a is inserted into the opening OP2 of the lower side housing wall portion 120e of the cylindrical wall portion 120. Further, a slight gap is formed between the lower end portion of the valve stem 131a and the opening OP2. The valve portion 131b is a substantially cylindrical portion formed at the lower end portion of the valve stem 131a, as shown, and is forced downward (i.e., toward the opening OP2) by the force applying member 132 (as a result, the valve stem 131a is also forced downward by the force applying member 132). Further, the valve portion 131b is designed so that its diameter is larger than the outer diameter of the fourth gasket PK4 when viewed from above. Moreover, in the internal space SP3, a slight gap is formed between the valve portion 131b and the lower side side wall portion 120b and the front side housing wall portion 120f of the cylindrical wall portion 120. Figures 4-6 Figures 4-6 Figures 4-6

[0082] (3-2) Force applying member

[0083] The force applying member 132 is a coil spring for applying a force to the valve body 131 in the downward direction. As shown, one end of the force applying member 132 is embedded in the upper side housing wall portion 120d of the cylindrical wall portion 120, and the other end of the force applying member 132 abuts against the valve portion 131b of the valve body 131. Figures 4-6

[0084] (3-3) Fourth gasket

[0085] The fourth gasket PK4 is a ring-shaped member formed of an elastic material such as rubber or an elastomer. Further, the fourth gasket PK4 is installed on the lower surface of the valve portion 131b of the valve body 131 so that the lower portion of the valve stem 131a of the valve body 131 passes through the central opening of the fourth gasket PK4, as shown. Here, the fourth gasket PK4 abuts against the upper surface of the lower side housing wall portion 120e of the cylindrical wall portion 120 to block the opening OP2 of the lower side housing wall portion 120e of the cylindrical wall portion 120 together with the valve body 131 if the valve body 131 is forced downward by the force applying member 132, as shown. Figure 4 Figures 3-5

[0086] ​​​​​​Further, in the plug body 100 of the embodiment of the present application, the mass of the front side portion is designed to be greater than the mass of the rear side portion. Specifically, this design is achieved by making the mass of the upper side side wall portion 120a of the cylindrical wall portion 120 greater than the mass of the pressure adjustment mechanism 130. With this design, in the case where the plug body 100 is attached to the vacuum double container 200, in the beverage container 10, the mass of the front side of the cylinder axis AX (refer to Figure 9 、 Figure 4 the center of the inner cylinder bottom wall portion of the inner cylinder 210 and the outer cylinder bottom wall portion 222 of the outer cylinder 220 in the up-and-down direction is greater than the mass of the rear side of the cylinder axis AX. That is, in the case where the plug body 100 is attached to the vacuum double container 200, if the beverage container 10 is tilted by a certain degree or more or is laid horizontally, the pressure adjustment mechanism 130 is located more on the upper side than the cylindrical wall portion 120. At this time, if the beverage is poured into the vacuum double container 200, the beverage flows into the internal space SP2, and the air accumulated in the internal space SP2 moves toward the pressure adjustment mechanism 130 side. Further, as shown in Figure 5 and Figures 1-5 the pressure adjustment mechanism 130 is located on the opposite side of the portion of the upper side side wall portion 120a of the cylindrical wall portion 120 other than the rear portion across the cylinder axis AX of the vacuum double container 200.

[0087] (4) Plug

[0088] The plug 140 is a member for plugging the flow outlet MO of the upper side side wall portion 120a of the cylindrical wall portion 120, and as shown in Figure 8 、 Figure 2 , mainly includes an upper side cover member 141, a lower side cover member 142, a plug body portion 143, and a rotation ring 144. Hereinafter, these structural elements will be described in detail. Further, as shown in Figure 5 and Figures 1-5 , the plug 140 can be located on the rear side of the shoulder member 110 (the rear side of the vacuum double container 200) through the strap 300 without plugging the flow outlet MO of the upper side side wall portion 120a of the cylindrical wall portion 120.

[0089] (4-1) Upper Side Cover Member

[0090] The upper side cover member 141 is a member formed of resin or the like, and as shown in Figure 8 、 Figures 1-5 , is mainly formed of a top wall portion 141a, a side wall portion 141b, a claw portion 141c, and a handle portion 141d. The top wall portion 141a is substantially disc-shaped as shown in Figure 1 , Figure 2 、 Figure 4 、 Figure 5, Figure 8 and Figure 4 As shown, it is generally cylindrical and extends downward from the outer edge of the top wall portion 141a. The claw portion 141c is as follows... Figure 5 , Figure 9 and Figures 1-3 As shown, the handle 141d extends inward from the middle of the inner peripheral surface of the side wall portion 141b and is inserted into the recess formed in the middle of the outer peripheral surface of the side wall portion 142b of the lower side cover member 142. The handle portion 141d is used by the user when rotating the upper side cover member 141, as... Figure 8 , Figure 4 As shown, the outer periphery of the side wall portion 141b extends outward from the diameter line passing through the center of the top wall portion 141a.

[0091] (4-2) Lower side cover component

[0092] The lower cover member 142 is a member formed of resin or the like, and as Figure 5 and Figure 4 As shown, it is mainly formed by a top wall portion 142a and a side wall portion 142b. The top wall portion 142a is as follows... Figure 5 and Figure 4 As shown, it is roughly disk-shaped. Furthermore, as... Figure 5 and Figure 4 As shown, a downwardly recessed portion 142o is formed in the center of the top wall portion 142a, and an opening is formed in the center of the recessed portion 142o. Additionally, as... Figure 5 and Figure 4 As shown, the lower side cover member 142 is fastened to the plug body 143 by inserting bolts SC through the insertion holes (described later) in the opening and plug body portion 143. The side wall portion 142b is as follows... Figure 5 , Figure 8 , Figure 9 and Figure 4 As shown, it is generally cylindrical and extends downward from the outer edge of the top wall portion 142a. As described above, a recess is formed in the middle of the outer peripheral surface of the side wall portion 142b, into which the claw portion 141c of the upper side cover member 141 is inserted.

[0093] (4-3) Plug body part

[0094] The plug body 143 is a component that can be freely inserted and detached from the internal space SP1 of the cylindrical wall 120, and as... Figure 5 , Figure 8 , Figure 9 and Figure 2 As shown, it is formed by a body portion 143a, an external thread portion 143b, and a fifth washer PK5. The body portion 143a is formed of resin or the like, such as... Figure 4 , Figure 5 , Figure 8 , Figure 9 andFigure 4 is shown to be substantially cylindrical. Further, as shown in Figure 5 and Figure 4 , a through-hole extending downward from a central portion of the upper wall portion of the body portion 143a is formed. As described above, the lower cover member 142 is fastened to the plug body portion 143 by inserting the bolt SC through the through-hole and the opening of the top wall portion 142a of the lower cover member 142. The external thread portion 143b is formed of resin or the like, and is screwable with the internal thread portion 120g of the cylindrical wall portion 120, as described above. The external thread portion 143b is formed at an intermediate portion of the outer peripheral surface of the body portion 143a, as shown in Figure 5 , Figure 8 , Figure 9 and Figure 4 . That is, the external thread portion 143b is not turned to a position at which the fifth gasket PK5 and the inner side portion of the eave portion 120c of the cylindrical wall portion 120 abut in the case of being screwed with the internal thread portion 120g of the cylindrical wall portion 120 (see Figure 9 and Figure 2 ). The fifth gasket PK5 is a ring-shaped member formed of an elastic material such as rubber or elastomer, and is attached to the lower end portion of the body portion 143a, as shown in Figure 4 , Figure 5 , Figures 7-9 , Figure 4 . Here, the fifth gasket PK5 abuts against the inner side portion of the eave portion 120c of the cylindrical wall portion 120 in the case of being screwed with the internal thread portion 120g of the cylindrical wall portion 120, as shown in Figure 9 and Figure 4 , and functions to block the gap between the body portion 143a and the cylindrical wall portion 120. Further, the abutting position of the fifth gasket PK5 against the inner side portion of the eave portion 120c of the cylindrical wall portion 120 is below the screwing position of the external thread portion 143b and the internal thread portion 120g of the cylindrical wall portion 120, as shown in Figure 9 and Figure 9 .

[0095] Here, the fifth gasket PK5 is shown to be substantially cylindrical. Further, as shown in Figure 9The external thread portion 143b of the plug 140 and the internal thread portion 120g of the cylindrical wall portion 120 will be described. When the external thread portion 143b of the plug 140 is engaged with the internal thread portion 120g of the cylindrical wall portion 120, the external thread portion 143b of the plug 140 does not reach the lower part of the internal thread portion 120g of the cylindrical wall portion 120. This is because if the upper part of the plug body portion 143 of the plug 140 abuts against the upper end of the internal thread portion 120g of the cylindrical wall portion 120 (i.e., the plug 140 is completely installed on the cylindrical wall portion 120), the plug 140 cannot move downwards, and the external thread portion 143b of the plug 140 remains in the position where it is engaged with the upper and middle parts of the internal thread portion 120g of the cylindrical wall portion 120. Therefore, when the external thread 143b of the plug 140 is engaged with the internal thread 120g of the cylindrical wall portion 120, a threaded valley space SP4 is formed between the upper sidewall portion 120a of the cylindrical wall portion 120 and the plug body portion 143 of the plug 140. Furthermore, when the external thread 143b of the plug 140 is engaged with the internal thread 120g of the cylindrical wall portion 120, the upper surface US1 of the external thread 143b of the plug 140 is approximately parallel to the lower surface LS2 of the internal thread 120g of the cylindrical wall portion 120, and the lower surface LS1 of the external thread 143b of the plug 140 is parallel to the upper surface US2 of the internal thread 120g of the cylindrical wall portion 120. Next, on the surface including the cylindrical axis AY (… Figure 9 In the middle, also including the cross section cut by the cylindrical axis AX of the vacuum double-walled container 200, when it is viewed as being cut by the cylindrical axis AY of the upper side wall portion 120a of the cylindrical wall portion 120. Figure 4 In this design, the surface orthogonal to the cylinder axis AX of the vacuum double-walled container 200, which is parallel to the cylinder axis AY, is designated as surface SF1. The extended surface of the upper surface US1 of the external thread portion 143b of the plug 140 is designated as surface SF2. The extended surface of the lower surface LS1 of the external thread portion 143b of the plug 140 is designated as surface SF3. The angle formed by the upper surface US1 (i.e., surface SF2) of the external thread portion 143b of the plug 140 with respect to surface SF1 is designated as angle θ1. The angle formed by the lower surface LS1 (i.e., surface SF3) of the external thread portion 143b of the plug 140 with respect to surface SF1 is designated as angle θ2. The external thread portion 143b of the plug 140 is designed such that angle θ1 is less than angle θ2.

[0096] Furthermore, in the beverage container 10 of the embodiment of the present invention, the outer diameter of the fifth washer PK5 of the stopper body portion 143 of the stopper 140 is smaller than the inner diameter of the upper end of the upper side wall portion 120a of the cylindrical wall portion 120 and the inner diameter of the upper end of the stepped portion 213 of the inner cylinder 210 (see reference). Figure 5 and Figure 4 ).

[0097] (4-4) Rotating ring

[0098] The rotation ring 144 is a substantially circular ring, as shown in Figure 5 , Figure 8 and Figure 4 , which is installed at the lower end of the outer circumferential surface of the side wall portion 142b of the lower cap member 142, and is rotatable with respect to the side wall portion 142b of the cap member 142. That is, in the case where the upper cap member 141 is turned by the user in order to release the state in which the plug 140 blocks the flow port MO of the upper side wall portion 120a of the cylindrical wall portion 120 (in addition, the lower cap member 142 and the plug body portion 143 also turn along with the upper cap member 141), the rotation ring 144 does not rotate along with the upper cap member 141, the lower cap member 142, and the plug body portion 143. Furthermore, as shown in Figure 5 and Figures 4-6 , a small circular ring portion 301 (described later) of a band 300 is installed at the outer circumferential surface of the rotation ring 144.

[0099] 3. Second gasket

[0100] The second gasket PK2 is a circular ring-shaped member formed of an elastic material such as rubber or an elastomer, and is installed in the recess formed by the step portion 223 of the outer cylinder 220 and the top end wall portion 224 of the outer cylinder 220, as described above. In addition, as shown in Figures 1-5 , in the case where the outer threaded portion 120h of the cylindrical wall portion 120 is screwed to the inner threaded portion 215 of the inner cylinder 210, the second gasket PK2 comes into contact with the inner side shoulder member 112 of the shoulder member 110. At this time, the second gasket PK2 functions to block the gap between the inner side shoulder member 112 of the shoulder member 110 and the outer cylinder 220.

[0101] 4. Band

[0102] The band 300 is a member that connects the shoulder member 110 and the plug 140 even after the state in which the plug 140 blocks the flow port MO of the upper side wall portion 120a of the cylindrical wall portion 120 is released (that is, even after the plug 140 is removed from the cylindrical wall portion 120), and is formed of an elastic material such as rubber or an elastomer. The band 300 is mainly formed of a small circular ring portion 301, a large circular ring portion 302, and a bridge portion 303, as shown in Figures 1-5 . The small circular ring portion 301 is a substantially circular ring, as shown in Figure 1 , which is installed at the outer circumferential surface of the rotation ring 144 of the plug 140. Thus, the small circular ring portion 301 is rotatable with the rotation ring 144 with respect to the side wall portion 142b of the lower cap member 142 of the plug 140. The large circular ring portion 302 is a substantially circular ring, as shown in Figure 2 , Figures 4-6 , Figure 1 , which is fitted into the recess 112p of the inner side shoulder member 112 of the shoulder member 110. In addition, at this time, as shown in Figure 2 ,Figure 4 , Figure 5 and Figures 1-5 As shown, the boundary portions of the large annular portion 302 and the bridging portion 303 are located behind the inner shoulder member 112 of the shoulder member 110, and the large annular portion 302 cannot rotate relative to the inner shoulder member 112 of the shoulder member 110. The bridging portion 303 is as follows... Figure 1 As shown, it is used to connect the small annular portion 301 and the large annular portion 302. Furthermore, the bridging portion 303 is as follows... Figure 4 and Figure 7 As shown, when the outlet MO of the upper side wall portion 120a of the cylindrical wall portion 120 is blocked by the plug 140, it is deformed into a roughly arc shape, thus also serving as a gripper for carrying.

[0103] Furthermore, assuming that the beverage container 10 does not have the strip 300, if the beverage container 10 is tilted or tilted sideways when the stopper 100 is installed in the vacuum double-walled container 200, depending on the tilting or tilting method, sometimes the pressure adjustment mechanism 130 will temporarily be completely on the lower side (i.e., sometimes the pressure adjustment mechanism 130 is aligned with the surface SF (refer to...)). Figure 7 The distance is temporarily minimized. However, by having a stripe 300 in the beverage container 10, thus... Figure 1 As shown, this reduces the likelihood of the pressure adjustment mechanism 130 being completely on the lower side (i.e., the distance between the pressure adjustment mechanism 130 and the surface SF is minimized).

[0104] <How to use and how to move the plug>

[0105] First, the desired beverage is injected into the vacuum double-walled container 200. Next, the external thread 120h of the cylindrical wall portion 120 of the stopper 100 is screwed into the internal thread 215 of the vacuum double-walled container 200, and then the external thread 143b of the stopper 140 of the stopper 100 is screwed into the internal thread 120g of the cylindrical wall portion 120 of the stopper 100, thereby completing the beverage container 10 (see reference). Figure 4 and Figure 4 Alternatively, after screwing the external thread 143b of the stopper 140 of the stopper body 100 into the internal thread 120g of the cylindrical wall portion 120 of the stopper body 100, screwing the external thread 120h of the cylindrical wall portion 120 of the stopper body 100 into the internal thread 215 of the vacuum double-walled container 200, thereby completing the beverage container 10. At this time, as... Figure 4 As shown, the third gasket PK3 abuts against the upper end of the stepped portion 213 of the inner cylinder 210 of the vacuum double-walled container 200, and the fifth gasket PK5 abuts against the inner side of the eaves 120c of the cylindrical wall portion 120 of the plug body 100. This maintains the vacuum double-walled container 200 and the plug body 100 in a watertight manner. Furthermore, as... Figure 1As shown, the inside space SP2 of the cylindrical wall portion 120 is filled with air. In addition, when the user drinks the beverage in the beverage container 10, the user releases the screwing state of the inner thread portion 120g of the cylindrical wall portion 120 of the plug body 100 and the outer thread portion 143b of the plug 140 of the plug body 100. Further, at this time, the gas in the beverage container 10 flows not only upward but also to the screw valley space SP4. Next, the user holds the vacuum double container 200 and lifts the beverage container 10, brings the cylindrical wall portion 120 of the plug body 100 to the mouth, and drinks the beverage in the beverage container 10. At this time, the beverage in the beverage container 10 flows into the user's mouth through the inside space SP2 and the inside space SP1 of the cylindrical wall portion 120. Next, after the user drinks the beverage in the beverage container 10, the user screws the outer thread portion 143b of the plug 140 of the plug body 100 to the inner thread portion 120g of the cylindrical wall portion 120 of the plug body 100.

[0106] Next, the operation mode of the pressure adjustment mechanism 130 of the plug body 100 in the case where the beverage in the beverage container 10 is a foamy beverage water (for example, a carbonated beverage or an alcoholic beverage, etc.), the outer thread portion 120h of the cylindrical wall portion 120 of the plug body 100 is screwed to the inner thread portion 215 of the vacuum double container 200, and the outer thread portion 143b of the plug 140 of the plug body 100 is screwed to the inner thread portion 120g of the cylindrical wall portion 120 of the plug body 100 (refer to Figure 4 and Figure 4 ) will be described. In this case, the internal pressure in the beverage container 10 becomes high. First, in the case where the internal pressure in the beverage container 10 does not become high, as shown in Figure 6 , in the pressure adjustment mechanism 130 of the plug body 100, the urging member 132 urges the valve body 131 and the fourth gasket PK4 downward, and the valve body 131 and the fourth gasket PK4 block the opening OP2 of the cylindrical wall portion 120 of the plug body 100. In addition, if the substance (for example, carbon dioxide, etc.) dissolved in the beverage water in the beverage container 10 gasifies into gas or the like and the internal pressure in the beverage container 10 becomes high, as shown in Figure 6 , in the pressure adjustment mechanism 130 of the plug body 100, the valve body 131 and the fourth gasket PK4 move upward against the urging force of the urging member 132, and the blocking state of the opening OP2 of the cylindrical wall portion 120 of the plug body 100 is released. Next, the gas flows as shown in ​The gas is discharged through the opening OP2 of the cylindrical wall portion 120 of the plug 100, the internal space SP3, and the opening OP3 of the cylindrical wall portion 120 of the plug 100, as indicated by the thick arrow. Then, if the internal pressure in the beverage container 10 gradually decreases, the valve body 131 and the fourth gasket PK4 are pressed downward by the pressing member 132, and the opening OP2 of the cylindrical wall portion 120 of the plug 100 is again blocked. In addition, when the gas is discharged through the opening OP2 of the cylindrical wall portion 120 of the plug 100, the internal space SP3, and the opening OP3 of the cylindrical wall portion 120 of the plug 100, sometimes bubbles and the like pass through the opening OP2 of the cylindrical wall portion 120 of the plug 100, but the bubbles and the like are captured by the internal space SP3. It is assumed that even if the bubbles and the like are discharged through the opening OP2 of the cylindrical wall portion 120 of the plug 100, the internal space SP3, and the opening OP3 of the cylindrical wall portion 120 of the plug 100, the bubbles and the like are left in the beverage container 10 by the first gasket PK1 and the second gasket PK2.

[0107] Features of the Plug of the Embodiment of the Invention (1)

[0109] In the plug 100 of the embodiment of the invention, in the case where the external thread portion 143b of the plug 140 is screwed with the internal thread portion 120g of the cylindrical wall portion 120, the fifth gasket PK5 of the plug body portion 143 of the plug 140 abuts against the inner side portion of the eave portion 120c of the cylindrical wall portion 120, and blocks the gap between the body portion 143a of the plug 140 and the cylindrical wall portion 120. Further, the abutting position of the fifth gasket PK5 of the plug body portion 143 of the plug 140 and the inner side portion of the eave portion 120c of the cylindrical wall portion 120 is the inner side below the screwing position of the external thread portion 143b of the plug 140 and the internal thread portion 120g of the cylindrical wall portion 120. Therefore, for the plug 100, even in the case where a relatively high pressure is generated in the inside of the beverage container 10 in the state where the plug 100 is installed in the vacuum double-layered container 200 and the plug 140 is installed in the cylindrical wall portion 120, the sealing structure is more easily maintained than in the conventional plug. (2)

[0111] In the plug 100 of the embodiment of the invention, the upper side side wall portion 120a of the cylindrical wall portion 120 is in a substantially cylindrical shape, and the inner side portion of the eave portion 120c of the cylindrical wall portion 120 extends inward from the boundary portion of the upper side side wall portion 120a and the lower side side wall portion 120b, and is in a substantially circular ring shape. Therefore, for the plug 100, the sealing surface obtained by the fifth gasket PK5 of the plug body portion 143 of the plug 140 in the state where the plug 140 is installed in the cylindrical wall portion 120 can be widened. (3)

[0113] In the plug body 100 of the embodiment, the angle θ1 that the upper surface US1 of the outer threaded portion 143b of the plug 140 makes with respect to a plane SF1 orthogonal to the cylinder axis A of the upper side sidewall portion 120a of the cylindrical wall portion 120 is smaller than the angle θ2 that the lower surface LS1 of the outer threaded portion 143b of the plug 140 makes with respect to the plane SF1 when viewed in cross section. Also, in the case where the outer threaded portion 143b of the plug 140 is screwed with the inner threaded portion 120g of the cylindrical wall portion 120, the upper surface US1 of the outer threaded portion 143b of the plug 140 is in a substantially parallel relationship with the lower surface LS2 of the inner threaded portion 120g of the cylindrical wall portion 120, and the lower surface LS1 of the outer threaded portion 143b of the plug 140 is in a parallel relationship with the upper surface US2 of the inner threaded portion 120g of the cylindrical wall portion 120. Therefore, for the plug body 100, the pressure resistance of the outer threaded portion 143b of the plug 140 can be improved. (4)

[0115] In the plug body 100 of the embodiment, in the case where the outer threaded portion 143b of the plug 140 is screwed with the inner threaded portion 120g of the cylindrical wall portion 120, a screw valley space SP4 is formed between the upper side sidewall portion 120a of the cylindrical wall portion 120 and the plug body portion 143 of the plug 140. Therefore, for the plug body 100, when the plug is opened by releasing the screwing state of the inner threaded portion 120g of the cylindrical wall portion 120 and the outer threaded portion 143b of the plug 140, the gas in the beverage container 10 that is intended to flow out of the beverage container 10 all at once through the internal space SP1 of the cylindrical wall portion 120 can be caused to flow not only upward but also to the screw valley space SP4, and the pressure of the internal space SP1 of the cylindrical wall portion 120 can be dispersed. Therefore, for the plug body 100, the plug flying or the sound at the time of opening the plug can be suppressed.

[0116] <Modified Example>

[0117] (A)

[0118] The shape or the material of each portion of the plug body 100 of the embodiment is not particularly limited, and each portion can be provided in any shape and can be composed of any material without departing from the gist of the present application. For example, in the plug body 100 of the embodiment, the shoulder member 110 or the cylindrical wall portion 120 is formed of resin or the like, but can be formed of metal or the like.

[0119] (B)

[0120] In the plug body 100 of the embodiment, the internal space SP2 is formed by the lower side wall portion 120b, the lower side housing wall portion 120e, the front side housing wall portion 120f, and the third gasket mounting wall portion 120i of the cylindrical wall portion 120, the internal space SP3 is formed by the lower side wall portion 120b, the upper side housing wall portion 120d, the lower side housing wall portion 120e, and the front side housing wall portion 120f of the cylindrical wall portion 120, and the shoulder member 110 or the strap 300, the first gasket PK1, the second gasket PK2, and the like are provided, but a part or all of these portions or members can be omitted within a range not impairing the gist of the application.

[0121] (C)

[0122] In the plug body 100 of the embodiment, the plug 140 is a plug of an external thread type in which an external thread portion 143b is formed in the plug body portion 143, but the plug 140 is not limited to the external thread type, and can be a plug of an internal thread type or another type. In the case of the plug of the internal thread type, an external thread portion is preferably formed in the outer peripheral surface of the upper side wall portion 120a of the cylindrical wall portion 120.

[0123] (D)

[0124] In the beverage container 10 of the embodiment, a beverage (including a sparkling beverage) is injected into the vacuum double-layered container 200, but the content added to the vacuum double-layered container 200 is not particularly limited.

[0125] (E)

[0126] In the embodiment, the container is the vacuum double-layered container 200, but the container is not particularly limited, and can be a general single-walled container, for example. Also, in the embodiment, stainless steel is used as the material of the container, but the material of the container can be an alloy other than stainless steel, a resin, or the like.

[0127] (F)

[0128] In the plug body 100 of the embodiment, the outer thread portion 143b of the plug 140 is adopted such that, when viewed in a cross section taken by a plane including the cylinder axis AY of the upper side sidewall portion 120a, the angle θ1 is smaller than the angle θ2, and the inner thread portion 120g of the cylindrical wall portion 120 is adopted such that the lower surface LS2 is in a substantially parallel relationship with the upper surface US1 of the outer thread portion 143b of the plug 140, and the upper surface US2 is in a parallel relationship with the lower surface LS1 of the outer thread portion 143b of the plug 140. However, the outer thread portion 143b of the plug 140 can be adopted such that, when viewed in the cross section, the angle θ1 is equal to the angle θ2, and the inner thread portion 120g of the cylindrical wall portion 120 can be adopted such that the lower surface LS2 is in a substantially parallel relationship with the upper surface US1 of the outer thread portion 143b of the plug 140, and the upper surface US2 is in a parallel relationship with the lower surface LS1 of the outer thread portion 143b of the plug 140. Further, the outer thread portion 143b of the plug 140 can be adopted such that, when viewed in the cross section, the angle θ1 is larger than the angle θ2, and the inner thread portion 120g of the cylindrical wall portion 120 can be adopted such that the lower surface LS2 is in a substantially parallel relationship with the upper surface US1 of the outer thread portion 143b of the plug 140, and the upper surface US2 is in a parallel relationship with the lower surface LS1 of the outer thread portion 143b of the plug 140.

[0129] (G)

[0130] In the plug body 100 of the embodiment, when viewed in a cross section taken by a plane including the cylinder axis AY of the upper side sidewall portion 120a, the lower surface LS2 of the inner thread portion 120g is in a substantially parallel relationship with the upper surface US1 of the outer thread portion 143b of the plug 140, but can be designed such that the lower surface LS2 of the inner thread portion 120g is in a complete parallel relationship with the upper surface US1 of the outer thread portion 143b of the plug 140.

[0131] (H)

[0132] In the plug body 100 of the embodiment, the outer thread portion 143b of the plug 140 is not turned to a position at which the fifth gasket PK5 of the plug body portion 143 of the plug 140 and the inner side portion of the eave portion 120c of the cylindrical wall portion 120 abut in the case of being screwed with the inner thread portion 120g of the cylindrical wall portion 120, but can be turned to the position at which the fifth gasket PK5 of the plug body portion 143 of the plug 140 and the inner side portion of the eave portion 120c of the cylindrical wall portion 120 abut.

[0133] Further, the modified examples can be applied individually or in combination.

Claims

1. A plug body comprising: a drinking port; a plug having an insertion portion that is inserted and removed to the inside of the drinking port; and a ring-shaped sealing member installed to the lower side of the insertion portion of the plug, the sealing member forms a sealing structure against the portion of the lower side of the drinking port when the plug is inserted, the insertion portion is an external thread portion formed on the outer periphery of the plug, the drinking port has a cylindrical body and an internal thread portion formed on the inside of the cylindrical body and capable of being screwed with the external thread portion, the angle of the upper surface of the external thread portion with respect to the plane orthogonal to the cylinder axis is smaller than the angle of the lower surface of the external thread portion with respect to the plane orthogonal to the cylinder axis when viewed in the cross section cut by the plane including the cylinder axis, the upper surface and the lower surface of the internal thread portion are in a substantially parallel relationship with the lower surface and the upper surface of the external thread portion.

2. The plug body according to claim 1, wherein the portion of the lower side of the drinking port is in a ring shape extending from the inner wall surface toward the cylinder axis.

3. The plug body according to claim 1 or 2, wherein the external thread portion is not turned to a sealing position, the internal thread portion is turned to a sealing position.

4. A beverage container comprising: the plug body according to any one of claims 1 to 3; and a bottomed cylindrical container for installing the plug body.

Images