CN113716203A - Cap unit and capped container - Google Patents

Abstract

The invention provides a cover unit capable of well maintaining the sealing performance of a liquid through hole. The cover unit includes: a cap body (8) which is attached to a neck portion (2c) of a container body (2) having an open upper portion and is provided with a liquid passage hole (12) communicating with the inside of the container body; a cover body (9) which is detachably mounted to the cover body (8) and is provided with an outer cover (17) covering the outer side of the cover body and a middle plug (18) which plugs the liquid through hole (12) in a state of being embedded in the inner side of the cover body (8); a water stop gasket (14) which seals the space between the inner side of the container body and the cover body in a state of being mounted on the outer periphery of the lower end side of the cover body; and a cover gasket (21) that seals the gap between the inner side of the cover body (8) and the plug (18) when attached to the outer peripheral portion of the plug (18), wherein the water-stop gasket (14) has a lower-surface-side protruding portion (14c) that closes the gap (S) between the plug (18) and the cover body.

Description

Cap unit and capped container

Technical Field

The invention relates to a cover unit and a container with a cover.

Background

Conventionally, there is a lidded container including a lid unit (plug body) detachably attached to a container main body having an upper opening. The lid unit includes a lid body attached to a neck portion of a container body having an open upper portion and provided with a liquid passage hole communicating with an inside of the container body, and a lid body for opening and closing the liquid passage hole (see, for example,patent document 1 below).

Specifically, the followingpatent document 1 discloses the following structure: the cap body is detachably attached to the cap body by screwing a female screw portion provided on an inner circumferential portion of the cap body and a male screw portion provided on an outer circumferential portion of the middle plug.

Further,patent document 1 below discloses a structure in which: the inside of the container body and the lid body are sealed by a water stop gasket attached to the outer peripheral portion of the lower end side of the lid body, and the inside of the lid body and the middle plug are sealed by a lid gasket attached to the outer peripheral portion of the middle plug.

Patent document 1: japanese patent laid-open publication No. 2014-162544

However, in the above-described conventional cap-equipped container, when the container body is inverted in the vertical direction and inverted, the beverage (liquid) contained in the container body may leak from the gap between the cap body and the plug to the inside of the liquid passage hole beyond the cap gasket.

In particular, when the container body is dropped in an inverted state, the lid gasket may be displaced from the outer peripheral portion of the plug by the lid gasket being pressed by the beverage contained in the container body due to an impact at the time of collision with the floor surface or the like. In this case, it is difficult to maintain the sealing performance of the liquid passage hole satisfactorily by the cover gasket.

Disclosure of Invention

The present invention has been made in view of the above-described conventional circumstances, and an object thereof is to provide a lid unit capable of maintaining the sealing property of a liquid passage hole in a satisfactory manner, and a container with a lid capable of further improving the usability by including the lid unit.

In order to achieve the above object, the present invention provides the following aspects.

[ 1 ] A lid unit, comprising:

a cap body detachably attached to a neck opening portion of a container body having an open upper portion, and provided with a liquid passage hole communicating with an inside of the container body;

a cover body detachably attached to the cover body, and provided with an outer cover covering an outer side of the cover body and a middle plug for closing the liquid passage hole in a state of being fitted into an inner side of the cover body;

a water-stop gasket that seals a space between the inside of the container body and the lid body in a state of being attached to an outer peripheral portion of a lower end side of the lid body; and

a cap gasket that seals a space between the inner side of the cap body and the plug in a state of being mounted on an outer peripheral portion of the plug,

the water stop gasket has a lower surface side protruding part for blocking a gap between the middle plug and the cover body.

[ 2 ] the cover unit according to the above [ 1 ], wherein,

the lower surface side protruding portion is provided to protrude in a diameter reduction direction from a lower end portion of the cap body.

[ 3 ] the cover unit according to the above [ 2 ], wherein,

the lower surface side protruding portion is in contact with a bottom wall portion constituting a lower surface of the middle plug over an entire circumference in a state where the middle plug closes the liquid passage hole.

[ 4 ] the lid unit according to the above [ 2 ] or [ 3 ], characterized in that,

the lower surface side protruding portion has a bent portion in which a tip end side thereof is bent upward.

[ 5 ] the lid unit according to the above [ 2 ] or [ 3 ], characterized in that,

the lower surface side protruding portion has a bent portion in which a tip end side thereof is bent downward.

[ 6 ] A lid unit, comprising:

a cap body detachably attached to a neck opening portion of a container body having an open upper portion, and provided with a liquid passage hole communicating with an inside of the container body;

a cover body detachably attached to the cover body, and provided with an outer cover covering an outer side of the cover body and a middle plug for closing the liquid passage hole in a state of being fitted into an inner side of the cover body; and

a cap gasket that seals a space between the inner side of the cap body and the plug in a state of being mounted on an outer peripheral portion of the plug,

the cover gasket is mounted in a state of being fitted into an annular groove portion provided in an outer peripheral portion of the middle plug,

the groove portion has an upper wall surface facing the upper surface of the cap gasket, a lower wall surface facing the lower surface of the cap gasket, and an inner wall surface contacting the inner peripheral surface of the cap gasket between the upper wall surface and the lower wall surface,

the upper wall surface is provided to protrude in a diameter expansion direction than the lower wall surface.

[ 7 ] the cover unit according to the above [ 6 ], wherein,

the cover washer has an elastic flange portion projecting from an outer peripheral surface thereof in a diameter expansion direction,

the elastic flange portion is brought into close contact with the inside of the cap body, thereby sealing the space between the inside of the cap body and the plug.

[ 8 ] the cover unit according to [ 7 ] above, wherein,

an outer peripheral end portion of the upper wall surface is located on an outer peripheral side of a base end portion of the elastic flange portion and on an inner peripheral side of a tip end portion of the elastic flange portion.

[ 9 ] the lid unit according to the above [ 7 ] or [ 8 ], wherein,

an outer peripheral end portion of the lower wall surface is located on an inner peripheral side of a base end portion of the elastic flange portion.

[ 10 ] the lid unit according to any one of [ 1 ] to [ 3 ] and [ 6 ] to [ 8 ], characterized in that,

the lid body is detachably attached to the lid body by screwing a female screw portion provided on an inner peripheral portion of the lid body and a male screw portion provided on an outer peripheral portion of the plug.

[ 11 ] A lid-equipped container, comprising:

the lid unit according to any one of [ 1 ] to [ 10 ] above; and

a container body for mounting the cover unit.

[ 12 ] the lidded container according to [ 11 ] above, characterized in that,

the container body has a vacuum heat insulating structure.

As described above, according to the present invention, it is possible to provide a lid unit capable of maintaining the sealing property of a liquid passage hole in a satisfactory manner, and a container with a lid capable of further improving the usability by providing such a lid unit.

Drawings

Fig. 1 is a cross-sectional view showing the structure of a lidded container provided with a lid unit according to an embodiment of the present invention.

Fig. 2 is a perspective view of the structure of the cover unit shown in fig. 1 as viewed from the lower side.

Fig. 3 is a bottom view showing the structure of the cover unit shown in fig. 1.

Fig. 4 is an exploded perspective view of the structure of the cover unit shown in fig. 1, as viewed from above.

Fig. 5 is an exploded perspective view of the structure of the cover unit shown in fig. 1, as viewed from the lower side.

Fig. 6 is a sectional view of a main portion showing an inverted state of the lidded container shown in fig. 1.

Fig. 7 is a sectional view showing another structure of the water stop gasket.

Fig. 8 is a sectional view showing the cover unit to which the water stop gasket shown in fig. 7 is attached.

Fig. 9 is a sectional view showing another structure of the water stop gasket.

Fig. 10 is a sectional view showing the cover unit to which the water stop gasket shown in fig. 9 is attached.

Description of the reference numerals

100 … container with cover; 1 … lid unit; 2 … container body; 6 … a first internal threaded portion; 7 … extension; 8 … a lid body; 9 … a cover; 10 … outer barrel component; 11 … inner barrel component; 12 … liquid through holes; 13 … a first externally threaded portion; 14. 14A, 14B … water stop gaskets; 14c … lower surface side protrusions; 14d … bent upward; 14e … downward curve; 15 … a second internal threaded portion; 17 … an outer cover; 18, 18 … medium bolt; 20 … a second external thread; 21 … cover washer; 21a … elastic flange portion; 22 … groove parts; 22a … upper wall surface; 22b … lower wall surface; s … gap.

Detailed Description

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

As one embodiment of the present invention, alidded container 100 provided with alid unit 1 shown in fig. 1 to 6, for example, will be described.

Fig. 1 is a cross-sectional view showing the structure of alidded container 100 provided with alid unit 1. Fig. 2 is a perspective view of the structure of thecover unit 1 as viewed from below. Fig. 3 is a bottom view showing the structure of thecover unit 1. Fig. 4 is an exploded perspective view of the structure of thecover unit 1 as viewed from above. Fig. 5 is an exploded perspective view of the structure of thecover unit 1 as viewed from below. Fig. 6 is a main part sectional view showing an inverted state of thelidded container 100.

As shown in fig. 1, a container with alid 100 of the present embodiment includes alid unit 1 of the present embodiment and acontainer body 2 to which thelid unit 1 is detachably attached. Thelidded container 100 is a beverage container capable of keeping a beverage (liquid) contained in thecontainer body 2 warm or cold by thecontainer body 2 having a vacuum heat insulation structure.

Specifically, thecontainer body 2 is formed of a double-layered container having a bottomed cylindricalouter container 3 and aninner container 4, which are formed of, for example, stainless steel, and the mouth portions of theouter container 3 and theinner container 4 are joined to each other in a state where theinner container 4 is accommodated therein. Further, avacuum insulation layer 5 is provided between theouter container 3 and theinner container 4. The vacuumheat insulating layer 5 can be formed by, for example, blocking an exhaust hole provided in the center portion of the bottom surface of theouter container 3 in a chamber that is depressurized (evacuated) to a high vacuum.

Thecontainer body 2 has: a substantially circularbottom surface portion 2a, acylindrical body portion 2b rising in a substantially cylindrical shape from the outer periphery of thebottom surface portion 2a, and a substantiallycylindrical neck portion 2c reduced in diameter on the upper side of thecylindrical body portion 2 b. The upper end ofneck portion 2c is opened in a circular shape asupper opening 2d ofcontainer body 2.

The inner peripheral surface of theneck portion 2c is narrower than the inner peripheral surface of thecylindrical portion 2 b. Further, a firstfemale screw portion 6 is provided on the inner peripheral surface of theneck portion 2 c. The firstfemale screw portion 6 is constituted by a thread ridge spirally protruding downward from the upper end side of theneck portion 2 c. An annular projecting portion 7 is provided below the firstfemale screw portion 6 so as to project from the inner peripheral surface of thecontainer body 2 over the entire periphery thereof.

The entire cappedcontainer 100 of the present embodiment has a substantially cylindrical external shape, but the external shape of the cappedcontainer 100 is not particularly limited, and may be appropriately changed according to the size, the external design, and the like. Further, the outer peripheral surface of thecontainer body 2 may be coated, printed, or the like.

As shown in fig. 1 to 5, thelid unit 1 of the present embodiment constitutes a plug body for closing theupper opening 2d of the containermain body 2, and includes a lidmain body 8 and alid body 9 detachably attached to the lidmain body 8.

Thecap body 8 has a cylindricalouter tube member 10 and aninner tube member 11 made of a heat-resistant resin such as polypropylene (PP). The lidmain body 8 may be formed integrally with the outercylindrical member 10 and the innercylindrical member 11.

In thecap body 8, theinner tubular member 11 penetrating through the outertubular member 10 is integrally attached to the outertubular member 10 by engaging the engagingconvex portion 10a provided on the inner peripheral surface of the outertubular member 10 with the engagingconcave portion 11a provided on the outer peripheral surface of theinner tubular member 11. In addition to the PP, for example, a thermoplastic resin such as Acrylonitrile Butadiene Styrene (ABS) can be used for theouter cylinder member 10.

A liquid throughhole 12 serving as a drinking hole or an injection port is provided inside the inner cylindrical member 11 (the lid main body 8). Theliquid passage hole 12 has: atapered hole portion 12a that gradually reduces in diameter downward from the upper end of the inner cylindrical member 11 (cap main body 8), a firststraight hole portion 12b that has the same diameter downward from the lower end of the taperedhole portion 12a, a steppedportion 12c that reduces in diameter downward from the firststraight hole portion 12b at the lower end of the firststraight hole portion 12b, and a secondstraight hole portion 12d that has the same diameter downward from the steppedportion 12 c.

A firstmale screw portion 13 is provided on the outer peripheral surface of the innercylindrical member 11 on the lower side across the outercylindrical member 10. The firstmale screw portion 13 is constituted by a screw thread spirally protruding upward from the lower end side of the innercylindrical member 11. Thus, thecap body 8 is detachably attached to theneck portion 2c of thecontainer body 2 by the engagement of the firstfemale screw portion 6 and the firstmale screw portion 13.

Awater stop gasket 14 is detachably attached to an outer peripheral portion of the lower end side of the inner tubular member 11 (the cover main body 8). Thewater seal gasket 14 is an annular seal member that seals between the inside of thecontainer body 2 and thelid body 8, and is made of, for example, a heat-resistant rubber such as silicone rubber, or an elastic member such as an elastomer.

Aflange portion 11b is provided on the outer peripheral portion of the lower end side of theinner tubular member 11 so as to protrude in the diameter expansion direction. On the other hand, an annularfitting recess 14a is provided on the inner circumferential surface of thewater stop gasket 14 over the entire circumference. Thewater stop gasket 14 is fitted over the entire circumference of the outer peripheral portion on the lower end side of theinner tube member 11 in a state where theflange portion 11b is fitted in thefitting recess portion 14 a.

Further, a plurality of (two in the present embodiment)elastic flange portions 14b arranged in the vertical direction are provided on the outer peripheral surface of thewater stop gasket 14 so as to protrude in the diameter expansion direction. When thecap body 8 is attached to theneck portion 2c of thecontainer body 2, thewater stop gasket 14 is in a state in which theelastic flange portion 14b is in close contact with the projecting portion 7 of thecontainer body 2 over the entire circumference while being elastically deformed. This enables the protruding portion 7 (inside the container body 2) and the inner tube member 11 (lid body 8) to be sealed.

Thewater stop gasket 14 preferably has a lowerelastic flange portion 14b in contact with the top upper side of the extension portion 7, and an upperelastic flange portion 14b in contact with the entrance side of the extension portion 7. This can improve the sealing property between the extension 7 (inside the container body 2) and the inner tube member 11 (lid body 8).

On the other hand, thewater stop gasket 14 is elastically deformed (stretched) to be removable from the outer peripheral portion of the lower end side of the inner tube member 11 (the lid main body 8). This enables the water-stop gasket 14 and thelid body 8 to be cleaned separately from each other, and the water-stop gasket 14 and thelid body 8 can be kept sanitary.

Thewater stop gasket 14 is not limited to the above shape, and for example, the number of theelastic flange portions 14b is not limited to two, and may be one, three or more. Thewater stop gasket 14 is not limited to the configuration in which theelastic flange portion 14b is provided, and the shape thereof may be appropriately changed.

The outer peripheral surface of the outer cylindrical member 10 (cap body 8) is formed in a substantially cylindrical shape so as to be flush with thecylindrical portion 2b of thecontainer body 2. Further, a secondfemale screw portion 15 is provided on the inner peripheral surface of the inner cylindrical member 11 (the cover main body 8). The secondfemale screw portion 15 is configured by a plurality of (four in the present embodiment) thread protrusions protruding from the position of the innercylindrical member 11 where the secondstraight hole portion 12d is formed. Further, a plurality ofgaps 15a for returning the beverage (liquid) remaining inside the inner tube member 11 (lid main body 8) toward the containermain body 2 are provided between these plurality of thread protrusions.

Theinner tube member 11 has awide mouth portion 16 whose diameter increases gradually toward the upper end in accordance with the shape of the taperedhole portion 12a on the upper side across theouter tube member 10. This makes it possible to easily drink or easily inject the beverage (liquid) flowing out of theliquid passage hole 12.

Thelid body 9 opens and closes theliquid passage hole 12, and includes anouter lid 17 and aninner plug 18 made of a heat-resistant resin such as PP.

Theouter lid 17 is a portion covering the outside of thelid body 8, and has aperipheral wall portion 17a formed in a substantially cylindrical shape so as to be flush with the outer peripheral surface of the outer tube member 10 (lid body 8), and atop wall portion 17b covering the upper portion of theperipheral wall portion 17 a. Themiddle plug 18 is a portion that closes theliquid passage hole 12 in a state of being fitted inside thecap body 8, and includes a substantially circularbottom wall portion 18a and aperipheral wall portion 18b that rises in a substantially cylindrical shape from the periphery of thebottom wall portion 18 a.

Themiddle plug 18 is positioned at the inner center portion of theouter cover 17, and theperipheral wall portion 18b is integrally attached to the lower center portion of thetop wall portion 17b by welding or the like. Further, aheat insulator 19 is disposed inside themiddle plug 18. Instead of theheat insulator 19, air (space) serving as a heat insulating layer may be provided inside theinner plug 18.

A secondexternal thread portion 20 is provided on the outer peripheral surface of theperipheral wall portion 18b (the middle plug 18). The secondexternal thread portion 20 is formed by a pair of thread grooves spirally cut upward from the lower end of theperipheral wall portion 18 b. Thus, the middle plug 18 (lid body 9) is detachably attached to the inner peripheral portion of the inner tubular member 11 (lid body 8) by the respective thread protrusions constituting the secondfemale screw portion 15 and the respective thread grooves constituting the secondmale screw portion 20 being screwed together.

The secondexternal thread portion 20 is formed of two threads that are complementary to each other. When two screws are used, thelid body 9 can be attached to and detached from thelid body 8 with a small number of rotational operations (about 160 ° in the present embodiment).

Acover washer 21 is detachably attached to an outer peripheral portion of theinner plug 18. Thecover gasket 21 is an annular sealing member that seals between the liquid passage hole 12 (inside the cover main body 8) and themiddle plug 18, and is made of an elastic member such as heat-resistant rubber or elastomer, for example, silicon rubber, as in the case of thewater stop gasket 14.

On the other hand, anannular groove 22 is provided on the outer peripheral surface of theperipheral wall 18b (the middle plug 18) over the entire periphery. Thecover gasket 21 is fitted and attached to thegroove 22 over the entire circumference.

A plurality of (two in the present embodiment)elastic flange portions 21a arranged in the vertical direction are provided on the outer peripheral surface of thecover gasket 21 so as to protrude in the diameter expansion direction. When thelid body 9 is attached to the lidmain body 8, thelid gasket 21 is in a state in which theelastic flange portion 21a is in close contact with theliquid passage hole 12 over the entire circumference while being elastically deformed. This makes it possible to seal the space between the liquid passage hole 12 (inside the lid main body 8) and theinner plug 18.

Thecap gasket 21 is preferably in a state where theelastic flange portion 21a is in close contact with the firststraight hole portion 12b near the boundary between thetapered hole portion 12a and the firststraight hole portion 12b when theplug 18 closes theliquid passage hole 12. Thus, when thelid body 9 is removed from thelid body 8, the space between the liquid passage hole 12 (inside the lid body 8) and theinner plug 18 can be opened only by slightly moving theelastic flange portion 21a from the state of being in close contact with the firststraight hole portion 12b toward the taperedhole portion 12 a.

On the other hand, thelid gasket 21 can be removed from thegroove portion 22 by elastically deforming itself (tensile elongation). This enables thelid gasket 21 and thelid body 9 to be cleaned separately from each other, and thelid gasket 21 and thelid body 9 can be kept sanitary.

Thecap washer 21 is not limited to the above shape, and the number of theelastic flange portions 21a is not limited to two, and may be one, three or more. Thelid gasket 21 is not limited to the configuration in which theelastic flange portion 21a is provided, and the shape thereof may be appropriately changed.

However, in thecover unit 1 of the present embodiment, as shown in fig. 1, thewater stop gasket 14 has a lowersurface side protrusion 14c that closes the gap S between themiddle plug 18 and the covermain body 8.

The lowersurface side protrusion 14c is provided to protrude in the diameter reduction direction from the lower end portion of thecap body 8. Thus, the lowersurface side protrusion 14c contacts the vicinity of the outer periphery of thebottom wall portion 18a of theplug 18 over the entire periphery thereof in a state where theplug 18 closes theliquid passage hole 12.

The water-stopping property due to the contact between the lowersurface side protrusion 14c and the vicinity of the outer peripheral portion of thebottom wall portion 18a does not need to be completely sealed, and may be sufficient if the water-stopping property is sufficient to prevent the space formed between themiddle plug 18, thelid body 8, thelid gasket 21, and the lowersurface side protrusion 14c from being filled with the beverage when the beverage falls.

In thecap unit 1 of the present embodiment, as shown in fig. 6, even when thecontainer body 2 is inverted by inverting the vertical direction of the cappedcontainer 100, the lower surfaceside protruding portion 14c closes the gap S between themiddle plug 18 and thecap body 8, and thereby the beverage (liquid) contained in thecontainer body 2 can be prevented from passing through thegap 15a from the gap S, crossing over thecap gasket 21, and leaking into the inside of theliquid passage hole 12.

In addition, in thecover unit 1 of the present embodiment, as shown in fig. 6, thegroove portion 22 includes: an upper wall surface 22a facing the upper surface of thecap gasket 21, alower wall surface 22b facing the lower surface of thecap gasket 21, and aninner wall surface 22c between the upper wall surface 22a and thelower wall surface 22b and in contact with the inner circumferential surface of thecap gasket 21.

The upper wall surface 22a is provided to protrude in the diameter expansion direction than thelower wall surface 22 b. Specifically, the outer peripheral end of the upper wall surface 22a is located on the outer peripheral side of the base end of theelastic flange portion 21a and on the inner peripheral side of the tip end of theelastic flange portion 21 a. On the other hand, the outer peripheral end of thelower wall surface 22b is located on the inner peripheral side of the base end of theelastic flange 21 a. Thus, thelid gasket 21 is less likely to be rolled up from the inside of thegroove 22 to the upper side in a state fitted in thegroove 22.

Therefore, in thelid unit 1 of the present embodiment, as shown in fig. 6, even when thelidded container 100 is dropped in an inverted state, it is possible to prevent thelid gasket 21 from being displaced from thegroove 22 due to thelid gasket 21 being pressed by the impact at the time of collision of the beverage stored in thecontainer body 2 with the floor surface or the like.

In thelid unit 1 of the present embodiment, the lowersurface side protrusion 14c closes the gap S between theplug 18 and thelid body 8, thereby suppressing the beverage accommodated in thecontainer body 2 from pressing thelid gasket 21.

As described above, in thecover unit 1 of the present embodiment, the sealing performance of theliquid passage hole 12 can be maintained well. Therefore, the container with alid 100 of the present embodiment can be further improved in usability by including thelid unit 1.

The present invention is not limited to the above embodiments, and various modifications can be made without departing from the scope of the present invention.

For example, thecover unit 1 may be configured to be attached with another water-stop gasket 14A shown in fig. 7 and 8. Fig. 7 is a sectional view showing the structure of thewater stop gasket 14A. Fig. 8 is a sectional view showing thecover unit 1 to which thewater stop gasket 14A is attached.

Specifically, as shown in fig. 7, thewater stop gasket 14A includes an upwardbent portion 14d in which the tip end side of the lower surfaceside protruding portion 14c is bent upward.

As shown in fig. 8, in thecover unit 1 to which thewater stop gasket 14A is attached, the lower surfaceside protruding portion 14c is brought into contact with the vicinity of the outer periphery of thebottom wall portion 18a of theinner plug 18 over the entire periphery thereof while the upwardbent portion 14d is elastically deformed in a state where theinner plug 18 closes theliquid passage hole 12.

In this configuration, the adhesion of the lowersurface side protrusion 14c to the vicinity of the outer periphery of thebottom wall portion 18a of themiddle plug 18 can be improved.

On the other hand, thecover unit 1 may be configured to be attached with anotherwater stop gasket 14B shown in fig. 9 and 10. Fig. 9 is a sectional view showing the structure of thewater stop gasket 14B. Fig. 10 is a sectional view showing thecover unit 1 to which thewater stop gasket 14B is attached.

Specifically, as shown in fig. 9, thewater stop gasket 14B includes a downwardbent portion 14e in which the tip end side of the lower surfaceside protruding portion 14c is bent downward.

As shown in fig. 10, in thecover unit 1 to which thewater stop gasket 14B is attached, in a state in which theliquid passage hole 12 is closed by themiddle plug 18, the lowersurface side protrusion 14c is in contact with the vicinity of the outer periphery of thebottom wall portion 18a of themiddle plug 18 over the entire periphery, and the downwardbent portion 14e is separated from the lower surface of themiddle plug 18.

With this structure, the downwardbent portion 14e of thewater stop gasket 14B can be easily removed. This makes it possible to easily remove thewater stop gasket 14 from the middle plug 18 (lid body 9).

The water-stop gaskets 14, 14A, and 14B may be configured such that: the lower surfaceside protruding portion 14c is separated from the vicinity of the outer periphery of thebottom wall portion 18a of themiddle plug 18 in a state where themiddle plug 18 closes theliquid passage hole 12, and the lower surfaceside protruding portion 14c is elastically deformed to come into contact with the outer periphery of the lower surface side of themiddle plug 18 when pressed by the beverage accommodated in thecontainer body 2.

In the above embodiment, the container withlid 100 having the heat and cold preservation function maintained by thecontainer body 2 having the vacuum heat insulation structure is exemplified, but the present invention can be applied to a container with lid having a container body not having a vacuum heat insulation structure.

Claims (12)

1. A cover unit is characterized by comprising:

a cap body detachably attached to a neck portion of a container body having an open upper portion, the cap body being provided with a liquid passage hole communicating with an inside of the container body;

a cover body detachably attached to the cover body, and provided with an outer cover covering an outer side of the cover body and a middle plug that closes the liquid passage hole in a state of being fitted into an inner side of the cover body;

a water seal gasket that seals a space between the inside of the container body and the lid body in a state of being attached to an outer peripheral portion on a lower end side of the lid body; and

a cover gasket that seals a space between the inner side of the cover main body and the plug in a state of being attached to an outer peripheral portion of the plug,

the water stop gasket has a lower surface side protruding part for blocking a gap between the middle plug and the cover main body.

2. The cover unit of claim 1,

the lower surface side protruding portion is provided to protrude in a diameter reduction direction from a lower end portion of the cap body.

3. The cover unit of claim 2,

the lower surface side protrusion is in contact with a bottom wall portion constituting a lower surface of the middle plug over an entire circumference in a state where the middle plug closes the liquid passage hole.

4. The cover unit according to claim 2 or 3,

the lower surface side protruding portion has a bent portion in which a tip end side thereof is bent upward.

5. The cover unit according to claim 2 or 3,

the lower surface side protruding portion has a bent portion in which a tip end side thereof is bent downward.

6. A cover unit is characterized by comprising:

a cap body detachably attached to a neck portion of a container body having an open upper portion, the cap body being provided with a liquid passage hole communicating with an inside of the container body;

a cover body detachably attached to the cover body, and provided with an outer cover covering an outer side of the cover body and a middle plug that closes the liquid passage hole in a state of being fitted into an inner side of the cover body; and

a cover gasket that seals a space between the inner side of the cover main body and the plug in a state of being attached to an outer peripheral portion of the plug,

the cover gasket is mounted in a state of being fitted into an annular groove portion provided in an outer peripheral portion of the plug,

the groove portion has an upper wall surface facing an upper surface of the cap gasket, a lower wall surface facing a lower surface of the cap gasket, and an inner wall surface contacting an inner peripheral surface of the cap gasket between the upper wall surface and the lower wall surface,

the upper wall surface is provided to protrude in a diameter expansion direction than the lower wall surface.

7. The cover unit of claim 6,

the cover gasket has an elastic flange portion protruding from an outer peripheral surface thereof in a diameter expansion direction,

the elastic flange portion is brought into close contact with the inside of the cap body, thereby sealing the space between the inside of the cap body and the plug.

8. The cover unit of claim 7,

an outer peripheral end portion of the upper wall surface is located on an outer peripheral side of a base end portion of the elastic flange portion and on an inner peripheral side of a tip end portion of the elastic flange portion.

9. The cover unit according to claim 7 or 8,

an outer peripheral end portion of the lower wall surface is located on an inner peripheral side of a base end portion of the elastic flange portion.

10. The cover unit according to any one of claims 1 to 3 and 6 to 8,

the lid body is detachably attached to the lid body by screwing a female screw portion provided on an inner peripheral portion of the lid body and a male screw portion provided on an outer peripheral portion of the plug.

11. A container with a lid, comprising:

a cover unit as claimed in any one of claims 1 to 10; and

a container body to which the cap unit is attached.

12. The lidded container of claim 11 wherein,

the container body has a vacuum insulation construction.

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