Cap unit and container with cap

Abstract

To provide a cap unit excellent in washability of a water stop packing and capable of keeping good sealing performance by the water stop packing.SOLUTION: A water stop packing 23 is formed of a ring-shaped elastic member that abuts on a projection part 6 projecting from inside a container body 2 over the entire circumference in a state where a cap body is attached to the container body 2, and has: a ring-shaped fitting convex part 23a that is fitted into a fitting concave part 24; an elastic flange part 23b that projects from an outer peripheral surface of the fitting convex part 23a over the entire circumference in a radially expanding direction; and an elastic sleeve part 23c that projects downward from between the fitting convex part 23a and the elastic flange part 23b over the entire circumference. While a lower surface of the elastic flange part 23b is kept in contact with an entry side surface of the projection part 6, an outer peripheral surface of the elastic sleeve part 23c becomes in contact with a top surface of the projection part 6. An inner peripheral surface of the elastic sleeve part 23c is continuously provided downward from a lower surface of the fitting convex part 23a.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a cap unit and a capped container. [Background technology]

[0002] Conventionally, there have been capped containers equipped with a cap unit (stopper) that is removably attached to the mouth and neck of a container body that has an open top, thereby closing the top opening of the container body (see, for example, Patent Document 1 below).

[0003] Such a cap unit has a cap body that closes the top opening of the container body and is attached to the container body by screwing. The cap unit also has a waterproof gasket that is detachably attached to the cap body, and this waterproof gasket seals (watertightly seals) the gap between the container body and the cap body.

[0004] The waterproof gasket is made of a ring-shaped elastic member and is detachably attached to the cap body. When the cap body is screwed onto the container body, the waterproof gasket comes into contact with a protruding portion that protrudes from the inside of the container body all around, causing the waterproof gasket to elastically deform and come into close contact with the protruding portion all around. This allows the gap between the container body and the cap body to be sealed (watertight).

[0005] For example, Patent Document 1 listed below discloses a configuration in which the outer peripheral surface of an annular seal packing is provided with an annular tongue-shaped portion that abuts against the inclined surface of the upper part of the seal step and extends outward in an eave-like cross section, and an annular hanging portion that abuts against the seal step and protrudes in an inverted U-shape in cross section, the hanging portion expanding due to the internal pressure within the liquid container and pressing against the protruding surface of the seal step, and the tongue-shaped portion is pressed against the inclined surface of the upper part of the seal step by the negative pressure within the liquid container.

[0006] Furthermore, Patent Document 2 listed below discloses a structure in which a sealing part with a ring-shaped protrusion having an inverted U-shaped cross section near the outer periphery tightly contacts a receiving ridge on the container body in an insulated container with a lid, mainly for storing hot food, to seal the inside of the container body. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Patent No. 3687084 [Patent Document 2] Japanese Patent Application Laid-Open No. 2016-169042 Summary of the Invention [Problem to be solved by the invention]

[0008] However, in the packing described in Patent Document 1, a concave gap is formed between the tongue-shaped portion and the hanging portion, and beverages tend to accumulate in this gap. In addition, this gap is difficult to clean and tends to become unsanitary.

[0009] Similarly, the seal portion described in Patent Document 2 also has a recessed gap formed near the outer periphery. Because the container has a wide mouth, it is expected that the contents, such as soup or solid foods, which are highly nutritious, will accumulate or become stuck in the gap. Therefore, such a gap is difficult to clean and easily becomes unsanitary.

[0010] The present invention has been proposed in consideration of the above-mentioned conventional circumstances, and aims to provide a cap unit that has excellent cleanability for the waterproof gasket and that can maintain good sealing performance provided by this waterproof gasket, as well as a capped container that, by being equipped with such a cap unit, allows for further improvement in usability. [Means for solving the problem]

[0011] In order to achieve the above object, the present invention provides the following means. [1] A cap unit that can be detachably attached to a container body having an open top, a cap body that closes the upper opening of the container body; a waterproof packing that is detachably attached to the cap body and seals the gap between the container body and the cap body; the cap body has a ring-shaped fitting portion on an outer peripheral surface of a portion that fits into the inside of the container body from the upper opening, the waterproof gasket is made of a ring-shaped elastic member that contacts a protruding portion that protrudes from the inside of the container body around the entire circumference when the cap body is attached to the container body, and a ring-shaped second fitting portion that is fitted into the first fitting portion, an elastic flange portion that protrudes from the outer peripheral surface of the second fitting portion in a radially expanding direction along the entire circumference, and an elastic sleeve portion that protrudes downward from between the second fitting portion and the elastic flange portion along the entire circumference, The lower surface of the elastic flange portion is in contact with the inlet surface of the protruding portion, and the outer peripheral surface of the elastic sleeve portion is in contact with the top surface of the protruding portion, The cap unit is characterized in that the inner peripheral surface of the elastic sleeve portion is provided continuously downward from the lower surface of the other fitting portion. [2] The cap unit described in [1] is characterized in that the waterproof gasket elastically displaces the elastic sleeve portion in the direction in which the outer surface of the elastic sleeve portion contacts the top surface of the protrusion portion by elastically deforming the elastic flange portion along the inlet surface of the protrusion portion. [3] The cap unit according to [1] or [2], wherein the elastic sleeve portion has a shape that gradually widens in diameter downward. [4] The cap unit according to any one of [1] to [3], wherein the elastic flange portion is located on the lower end side of the outer circumferential surface of the other fitting portion. [5] The one fitting portion has a shape whose width gradually increases from its bottom side toward its opening side, The cap unit according to any one of [1] to [4], wherein the other fitting portion has a shape whose width gradually narrows from its base end side toward its tip end side. [6] The cap unit according to any one of [1] to [5], wherein the elastic member is made of fluororubber. [7] The cap unit according to any one of [1] to [6], wherein the cap body is attached to the container body by screwing. [8] The cap unit according to any one of [1] to [7] above; A capped container comprising: a container body to which the cap unit is attached. [9] The capped container according to [8], wherein the container body has a vacuum insulation structure. [Effects of the Invention]

[0012] As described above, according to the present invention, it is possible to provide a cap unit that has excellent cleanability for the watertight gasket and that can maintain good sealing performance provided by this watertight gasket, as well as a capped container that, by being equipped with such a cap unit, allows for further improvement in usability. [Brief explanation of the drawings]

[0013] [Figure 1] 1 is a cross-sectional view showing the configuration of a capped container equipped with a cap unit according to one embodiment of the present invention. [Figure 2] 2 is a perspective view showing the configuration of a mouth-forming member included in the cap unit shown in FIG. 1. FIG. [Figure 3] 2A and 2B show the configuration of a waterproof gasket provided in the cap unit shown in FIG. 1, in which (A) is a perspective view seen from above, and (B) is a perspective view seen from below. [Figure 4] FIG. 4 is a cross-sectional view showing the configuration of the waterproof gasket shown in FIG. [Figure 5] 2 is a cross-sectional perspective view showing a state in which a waterproof gasket abuts on a protruding portion of a container body provided on the capped container shown in FIG. 1. FIG. [Figure 6] 1. FIG. 4 is a cross-sectional view showing another example of the configuration of the capped container shown in FIG. [Figure 7] 1. FIG. 4 is a cross-sectional view showing another example of the configuration of the capped container shown in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0014] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. As one embodiment of the present invention, a capped container 100 including a cap unit 1 shown in Fig. 1 will be described. Fig. 1 is a cross-sectional view showing the configuration of the capped container 100 including the cap unit 1.

[0015] 1, the capped container 100 of this embodiment includes a cap unit 1 of this embodiment and a container body 2 to which the cap unit 1 is detachably attached. The capped container 100 is a beverage container that can keep the beverage (contents) contained in the container body 2 hot or cold by the container body 2 having a vacuum insulation structure.

[0016] Specifically, the container body 2 has a cylindrical outer container 3 and an inner container 4 with a bottom made of, for example, stainless steel, and is configured as a double-structure container in which the mouths of the outer container 3 and the inner container 4 are joined together with the inner container 4 housed inside the outer container 3. A vacuum insulation layer 5 is provided between the outer container 3 and the inner container 4. The vacuum insulation layer 5 can be formed, for example, by blocking a vent hole provided in the center of the bottom of the outer container 3 in a chamber that has been reduced to a high vacuum (evacuated).

[0017] The container body 2 has a substantially circular bottom surface 2a, a body portion 2b that stands up in a substantially cylindrical shape from the outer periphery of the bottom surface 2a, and a substantially cylindrical mouth / neck portion 2c that is tapered in diameter at the upper side of the body portion 2b. The upper end of the mouth / neck portion 2c opens in a circular shape as an upper opening 2d of the container body 2. The inner circumferential surface of the mouth / neck portion 2c is tapered in diameter compared to the inner circumferential surface of the body portion 2b. Furthermore, a ring-shaped protrusion 6 is provided on the inner circumferential surface of the mouth / neck portion 2c so as to protrude around the entire circumference.

[0018] Although the capped container 100 of this embodiment has a generally cylindrical external shape overall, the external shape of the capped container 100 is not particularly limited and can be modified as appropriate to suit the size, design, etc. The outer peripheral surface of the container body 2 may be painted, printed, or the like.

[0019] The configuration of the cap unit 1 of this embodiment will be described with reference to FIGS. 2 is a perspective view showing the configuration of the opening-forming member 12 provided in the cap unit 1. FIG. 3 shows the configuration of the waterproof gasket 23 provided in the cap unit 1, with (A) being a perspective view seen from above and (B) being a perspective view seen from below. FIG. 4 is a cross-sectional view showing the configuration of the waterproof gasket 23. FIG. 5 is a cross-sectional perspective view showing the waterproof gasket 23 abutting against the protruding portion 6 of the container body 2 provided in the capped container 100.

[0020] 1, the cap unit 1 of this embodiment constitutes a plug that closes the upper opening 2d of the container body 2. Specifically, the cap unit 1 includes a cap body 7 and a lid body 9 rotatably attached to the cap body 7 via a hinge portion 8.

[0021] In the following description, the side where the lid body 9 is attached to the cap body 7 via the hinge portion 8 will be referred to as the "rear side (back side)" of the cap unit 1 (capped container 100), and the opposite side will be referred to as the "front side (front face side)" of the cap unit 1 (capped container 100).

[0022] The cap body 7 is made of a heat-resistant resin such as polypropylene (PP). The cap body 7 has a peripheral wall portion 7a formed in a substantially cylindrical shape so as to be continuous with the barrel portion 2b of the container body 2, an upper wall portion 7c having an opening 7b formed at the upper portion of the peripheral wall portion 7a and having a smaller diameter than the peripheral wall portion 7a, and a mouth-forming member 12 detachably attached to the opening 7b.

[0023] The cap body 7 is detachably attached by screwing to the neck portion 2c of the container body 2. For this purpose, a female screw portion 10 is provided on the inner peripheral surface of the peripheral wall portion 7a. On the other hand, a male screw portion 11 that screws into the female screw portion 10 is provided on the outer peripheral surface of the neck portion 2c.

[0024] 1 and 2, a mouth-forming member 12 that forms a drinking spout or a pouring spout (a drinking spout in this embodiment) is detachably attached to the opening 7b of the cap body 7. The mouth-forming member 12 is made of a heat-resistant resin such as polypropylene (PP).

[0025] The mouth-forming member 12 has a bottom wall portion 12a in which a liquid passage hole 13 and an air passage hole 14 are formed, a cylindrical peripheral wall portion 12b that rises upward from the periphery of the bottom wall portion 12a, a lower flange portion 12c that protrudes in a ring shape from the lower end side of the outer surface of the bottom wall portion 12a, a pair of upper flange portions 12d that protrude horizontally from both the left and right sides of the upper end side of the outer surface of the peripheral wall portion 12b, and a drinking spout portion 12e that protrudes in a diagonally cut shape from the upper front end of the peripheral wall portion 12b.

[0026] Of these, the drinking spout 12e is located on the front side of the spout-forming member 12. The liquid passage 13 is provided by penetrating the bottom wall 12a in the vertical direction. The air vent 14 is provided by penetrating the bottom wall 12a in the vertical direction from a position higher than the liquid passage 13. The liquid passage 13 is located closer to the drinking spout 12e (front side) than the air vent 14, and opens in a generally elliptical shape that is larger in the front-to-back direction than the air vent 14, which forms a round hole.

[0027] A detachment mechanism 15 is provided between the cap body 7 and the mouth-forming member 12 for detachably attaching the mouth-forming member 12 to the opening 7b of the cap body 7. The detachment mechanism 15 has a stopper 18 including a first claw portion 16 provided on the front side of the mouth-forming member 12 and a second claw portion 17 provided on the rear side of the mouth-forming member 12.

[0028] The first claw portion 16 is provided so as to protrude forward from the upper end side of the outer peripheral surface of the peripheral wall portion 12b. The second claw portion 17 is provided so as to protrude rearward from the upper end (tip end) side of the stopper 18. The stopper 18 is disposed on the rear side of the opening-forming member 12, and is rotatably attached to the opening-forming member 12 via a hinge portion 19 located on the lower end (base end) side of the stopper 18.

[0029] A biasing member 20 made of an elastic material such as rubber or elastomer is disposed between the opening-forming member 12 and the stopper 18. The biasing member 20 is attached to the surface of the stopper 18 that faces the opening-forming member 12. Note that for the biasing member 20, a spring member such as a coil spring may be used instead of the elastic member described above.

[0030] When the tip end side of the stopper 18 is rotated forward, the biasing member 20 is compressed (elastically deformed) between the stopper 18 and the opening-forming member 12, thereby biasing the stopper 18 rearward. In addition, an operating portion 18a is provided at the upper end (tip) of the stopper 18 to make it easier to rotate the stopper 18 with a finger.

[0031] On the other hand, the detaching mechanism 15 has a first locked portion 21 on the front side of the cap body 7 and a second locked portion 22 on the rear side of the cap body 7. The first locked portion 21 and the second locked portion 22 are each made up of a stepped portion provided at a front-rear position along the opening 7b of the upper wall portion 7c.

[0032] In the detaching mechanism 15, the opening-forming member 12 is fitted from below into the inside of the opening 7b of the cap body 7 with the first claws 16 positioned relative to the first locked portions 21. At this time, the pair of upper flanges 12d abuts against the lower surface of the upper wall portion 7c of the cap body 7. In addition, the first claws 16 are locked to the first locked portions 21.

[0033] Furthermore, as the second claw portion 17 abuts against the edge of the opening 7b of the cap body 7 and climbs over the edge of the opening 7b, the tip side of the stopper 18 rotates forward, and then the tip side of the stopper 18 returns to its original position at the rear, and at the same time, the second claw portion 17 is engaged with the second engaged portion 22.

[0034] As a result, the spout-forming member 12 is attached to the opening 7b of the cap body 7. At the same time as the spout-forming member 12 is attached, the drinking spout 12e protrudes outward (upward) from the opening 7b of the cap body 7.

[0035] Meanwhile, in the detachment mechanism 15, the second claw portion 17 is released from the locked state with the second locked portion 22 by rotating the operating portion 18a of the stopper 18 forward. This makes it possible to remove the opening-forming member 12 from below the opening 7b of the cap body 7 while releasing the locked state of the first claw portion 16 with the first locked portion 21.

[0036] The cap body 7 equipped with the mouth-forming member 12 is attached to the mouth-neck portion 2c of the container body 2, thereby closing the upper opening 2d of the container body 2 with the mouth-forming member 12 fitted into the inside of the container body 2 from the upper opening 2d.

[0037] As shown in Figures 1 and 2, the lower flange portion 12c of the mouth-forming member 12 is the part that is fitted into the inside of the container body 2 from the upper opening 2d of the cap body 7, and a ring-shaped fitting recess 24, which serves as one of the fitting portions, is provided around the entire outer surface of the upper side.

[0038] A waterproof gasket 23 is detachably attached to the fitting recess 24 of the opening-forming member 12. The waterproof gasket 23 is a ring-shaped sealing member for sealing the gap between the protruding portion 6 (container body 2) and the opening-forming member 12 (cap body 7). The waterproof gasket 23 is made of an elastic material such as heat-resistant rubber or elastomer, for example, silicone rubber or fluororubber. In particular, in this embodiment, an elastic material made of fluororubber is used as the waterproof gasket 23. Fluororubber has properties such as excellent chemical resistance and being less susceptible to odors caused by the contents.

[0039] As the fluororubber, for example, materials such as vinylidene fluoride (FKM), tetrafluoroethylene-propylene (FEPM), and tetrafluoroethylene-perfluorovinyl ether (FFKM) can be used.

[0040] 1, 3, and 4, the waterproof gasket 23 has, as the other fitting portion, a ring-shaped fitting protrusion 23a that fits into the fitting recess 24. The waterproof gasket 23 is detachably attached to the opening-forming member 12 (cap body 7) by fitting the fitting protrusion 23a into the fitting recess 24.

[0041] On the other hand, the waterproof gasket 23 can be removed from the fitting recess 24 (opening-forming member 12) by elastically deforming (pulling and stretching) the waterproof gasket 23. This allows the waterproof gasket 23 and the open-forming member 12 to be washed separately, and the space between the waterproof gasket 23 and the open-forming member 12 can be kept hygienic.

[0042] The fitting recess 24 has a tapered shape that gradually widens from its bottom side toward its opening side, while the fitting protrusion 23a has a tapered shape that gradually narrows from its base end side toward its tip end side, corresponding to the shape of the fitting recess 24.

[0043] By making the fitting recess 24 and fitting protrusion 23a of the watertight gasket 23 have such a tapered shape, it becomes easier to attach and detach the watertight gasket 23 to and from the fitting recess 24 of the opening-forming member 12. In particular, when the watertight gasket 23 made of the above-mentioned fluororubber is used, it is preferable to make the fitting recess 24 and fitting protrusion 23a have such a tapered shape, because fluororubber is a material that is less likely to stretch than silicone rubber.

[0044] In addition, the waterproof gasket 23 has an elastic flange portion 23b that protrudes from the outer peripheral surface of the mating convex portion 23a in the radially expanding direction around the entire circumference, and an elastic sleeve portion 23c that protrudes downward from between the mating convex portion 23a and the elastic flange portion 23b around the entire circumference.

[0045] Of these, the elastic flange portion 23b is a portion that comes into contact with the entry surface of the protruding portion 6, and is located on the lower end side of the outer circumferential surface of the fitting protrusion portion 23a.

[0046] On the other hand, elastic sleeve portion 23c is a portion that abuts against the top surface of overhang portion 6, and is located between the lower surface of fitting convex portion 23a and the lower surface of elastic flange portion 23b. The inner peripheral surface of elastic sleeve portion 23c is provided smoothly and continuously downward from the lower surface of fitting convex portion 23a, with the inner peripheral side open.

[0047] The elastic sleeve portion 23c has a tapered shape that gradually widens in diameter downward, thereby satisfying the relationship: (outer diameter of the elastic flange portion 23b)>(inner diameter of the protrusion 6)>(outer diameter of the elastic sleeve portion 23c).

[0048] When the cap body 7 is attached to the container body 2, the waterproof gasket 23 comes into contact with the protruding portion 6 of the container body 2, and while elastically deforming, comes into close contact with the entire periphery of the protruding portion 6. Specifically, the lower surface of the elastic flange portion 23b comes into contact with the inlet surface of the protruding portion 6, and the outer peripheral surface of the elastic sleeve portion 23c comes into contact with the top surface of the protruding portion 6.

[0049] At this time, elastic flange portion 23b of waterproof gasket 23 elastically deforms along the entry surface of overhanging portion 6, thereby elastically displacing elastic sleeve portion 23c in a direction in which the outer circumferential surface of elastic sleeve portion 23c comes into contact with the top surface of overhanging portion 6. As a result, elastic flange portion 23b is lifted upward along the entry surface of overhanging portion 6, and elastic sleeve portion 23c expands in the radial direction accordingly, and is pressed against the top surface of overhanging portion 6. This makes it possible to maintain good sealing between overhanging portion 6 (container body 2) and opening-forming member 12 (cap body 7) while keeping waterproof gasket 23 in close contact with overhanging portion 6.

[0050] The waterproof gasket 23 is not necessarily limited to the above-mentioned elastic sleeve portion 23c having a tapered shape with a gradually increasing diameter toward the bottom, and the shape of the elastic sleeve portion 23c may be any shape that allows the elastic flange portion 23b to elastically deform along the entry surface of the protrusion portion 6, thereby elastically displacing the elastic sleeve portion 23c toward the direction of contacting the top surface of the protrusion portion 6.

[0051] 1, the lid 9 closes the top of the cap body 7 and is made of a heat-resistant resin such as polypropylene (PP). The lid 9 has a peripheral wall 9a formed in a substantially cylindrical shape so as to be continuous with the peripheral wall 7a of the cap body 7, and a top wall 9b covering the top surface of the peripheral wall 9a.

[0052] A plug member 25 is provided inside the lid body 9, and is fitted inside the opening-forming member 12. The plug member 25 is attached by fitting to the approximate center of the lower surface side of the top wall portion 9b.

[0053] A lid gasket 26 that closes the liquid passage hole 13 and the air vent hole 14 of the port-forming member 12 is detachably attached to the outer periphery of the plug member 25. The lid gasket 26 is a plug-shaped sealing member that seals the gap between the port-forming member 12 and the plug member 25. The lid gasket 26 is made of an elastic member, and the same material as the waterproof gasket 23 can be used for this elastic member.

[0054] Lid gasket 26 is fitted onto closure member 25 so as to cover the outer periphery of closure member 25. Lid gasket 26 is provided with a substantially dome-shaped first plug portion 26a that abuts against liquid passage port 13 and a substantially cylindrical second plug portion 26b that abuts against vent port 14.

[0055] When the lid packing 26 is fitted inside the port-forming member 12, it elastically deforms so that the first plug portion 26a comes into close contact with the periphery of the liquid passage port 13 to close the liquid passage port 13, and the second plug portion 26b comes into close contact with the periphery of the air vent port 14 to close the air vent port 14. This makes it possible to seal the gap between the port-forming member 12 and the plug member 25.

[0056] A biasing member 27 is provided between the cover 9 and the hinge 8. The biasing member 27 is made of a ring-shaped elastic member made of, for example, rubber or elastomer, and is hooked between the cover 9 and the hinge 8.

[0057] The lid body 9 is biased in a direction (opening direction) that opens the liquid passage port 13 and the air vent port 14 of the port forming member 12 by the biasing member 27. Note that the biasing member 27 is not limited to the elastic member described above, and may be configured to bias the lid body 9 in the opening direction by providing a spring member such as a torsion coil spring inside the hinge portion 8.

[0058] The cap unit 1 includes a lid locking mechanism 28 that fixes the lid body 9 to the cap body 7 when the lid body 9 is in a position where it closes the top of the cap body 7 (hereinafter referred to as the closed position).

[0059] The lid locking mechanism 28 has a locking member 30 rotatably attached to the cap body 7 via a hinge portion 29, and a ring stopper 31 rotatably attached to the cap body 7 via the hinge portion 29.

[0060] The locking member 30 is rotatably supported by a hinge portion 29 provided on the front side of the cap body 7 (peripheral wall portion 7a). The locking member 30 has a first arm portion 30a extending upward from the hinge portion 29 and a second arm portion 30b extending downward from the hinge portion 29.

[0061] A hook portion 32 is provided at the tip of the first arm portion 30a (the upper end of the locking member 30) so as to protrude rearward. A biasing member 33 made of a spring member such as a coil spring is disposed between the second arm portion 30b and the peripheral wall portion 7a. Note that instead of the spring member described above, a resilient member such as rubber or elastomer may be used for the biasing member 33.

[0062] The ring stopper 31 is made of a ring-shaped member with a portion open, and both ends thereof are rotatably supported on the outside of the hinge portion 29. This allows the ring stopper 31 to rotate.

[0063] On the other hand, the lid lock mechanism 28 has a lock receiving portion 34 to which the hook portion 32 of the locking member 30 is engaged, and a stopper receiving portion 35 to which the ring stopper 31 is hooked. The lock receiving portion 34 is made of a claw portion that protrudes forward from the lower end portion on the front side of the lid body 9 (peripheral wall portion 9a). The stopper receiving portion 35 has a shape that corresponds to the inside of the ring stopper 31, and is made of a wall portion that protrudes forward from a position that surrounds the periphery of the lock receiving portion (claw portion) 34.

[0064] In the lid locking mechanism 28, when the lid body 9 closes the top of the cap body 7, the hook portion 32 of the locking member 30 engages with the lock receiving portion 34, thereby maintaining the lid body 9 closing the top of the cap body 7.

[0065] From this state, the hook portion 32 is released from the locked state with respect to the lock receiving portion 34 by pressing the second arm portion 30b side of the locking member 30 against the biasing force of the biasing member 33. This makes it possible to rotate the lid body 9 biased by the biasing member 27 in the opening direction.

[0066] On the other hand, in the lid locking mechanism 28, when the lid 9 closes the top of the cap body 7, the ring stopper 31 is latched onto the stopper receiving portion 35, thereby preventing the lid 9 from rotating in the opening direction. This makes it possible for the lid locking mechanism 28 to prevent the lid 9 from being opened by unnecessary operation of the locking member 30.

[0067] In the capped container 100 equipped with the cap unit 1 of this embodiment, the inner circumferential surface of the elastic sleeve portion 23c described above is smoothly and continuously provided downward from the underside of the fitting protrusion 23a with the inner circumferential side open. In this case, no gap is formed from the underside of the fitting protrusion 23a to the inner circumferential surface of the elastic sleeve portion 23c, so beverages do not accumulate in the gap or solid objects do not become trapped, making it hygienic. Furthermore, the watertight gasket 23 can be easily cleaned and dried, making it hygienic because dirt does not remain on the inner circumferential surface.

[0068] Furthermore, in the capped container 100 equipped with the cap unit 1 of this embodiment, when a carbonated beverage such as a carbonated drink, carbonated water, beer, or sparkling wine is placed in the container body 2, the carbon dioxide gas causes the pressure inside the sealed container body 2 to rise.

[0069] At this time, the waterproof gasket 23 is in a state of tight contact with the entire circumference of the protrusion 6, with the lower surface of the elastic flange portion 23b in contact with the inlet surface of the protrusion 6 and the outer surface of the elastic sleeve portion 23c in contact with the top surface of the protrusion 6.

[0070] Furthermore, as the elastic flange portion 23b of the waterproof gasket 23 elastically deforms along the entry surface of the overhanging portion 6, the elastic sleeve portion 23c is elastically displaced in a direction in which the outer peripheral surface of the elastic sleeve portion 23c comes into contact with the top surface of the overhanging portion 6. As a result, the elastic flange portion 23b is lifted upward along the entry surface of the overhanging portion 6, and the elastic sleeve portion 23c expands in the radial direction following this and is pressed against the top surface of the overhanging portion 6.

[0071] In particular, when the pressure inside the container body 2 increases, the elastic sleeve portion 23c receives the pressure and expands further in the radial direction, so that it is pressed against the top surface of the protruding portion 6 more strongly.

[0072] As a result, in the capped container 100 equipped with the cap unit 1 of this embodiment, even when a carbonated beverage is stored in the container body 2, it is possible to maintain good sealing between the protruding portion 6 (container body 2) and the mouth-forming member 12 (cap body 7) while keeping the waterproof gasket 23 in close contact with the protruding portion 6. This makes it possible to prevent carbon dioxide gas or beverage from leaking from between the waterproof gasket 23 and the protruding portion 6, and to prevent the waterproof gasket 23 from rolling up.

[0073] As described above, the cap unit 1 of this embodiment has excellent cleanability for the waterproof gasket 23, and can also maintain good sealing performance provided by the waterproof gasket 23. Therefore, by providing the capped container 100 of this embodiment with such a cap unit 1, it is possible to further improve usability.

[0074] The present invention is not necessarily limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention. Specifically, in the above-mentioned cap unit 1, the water-stopping gasket 23 is configured to be detachably attached to the mouth-forming member 12 (cap body 7) by engaging the engaging recess 24, which is one of the engaging portions provided on the above-mentioned mouth-forming member 12, with the engaging protrusion 23a, which is the other of the engaging portions provided on the water-stopping gasket 23.However, the one engaging portion and the other engaging portion can also be configured, for example, as in cap units 1A and 1B shown in Figures 6 and 7.

[0075] Of these, in the cap unit 1A shown in Figure 6, the water-stopping gasket 23 is removably attached to the mouth-forming member 12 (cap body 7) by engaging the mating convex portion 24a, which is one mating portion provided on the mouth-forming member 12, with the mating concave portion 23d, which is the other mating portion provided on the water-stopping gasket 23.

[0076] On the other hand, in the cap unit 1B shown in Figure 7, in addition to the configuration of the mating convex portion 24a and mating concave portion 23d shown in Figure 6 above, a ring-shaped flange portion 24b that contacts the upper surface of the waterproof gasket 23 attached to the mouth-forming member 12 is provided on the mouth-forming member 12 (cap main body 7).

[0077] Although the cap unit 1 is configured such that the cap body 7 is attached to the container body 2 by screwing, the configuration is not necessarily limited to this. For example, the cap unit 1 may be configured such that the opening-forming member 12 is fitted into the inside of the container body 2 from the upper opening 2d, and the opening-forming member 12 is attached to the container body 2 by screwing.

[0078] In this configuration, instead of the above-mentioned female screw portion 10 and male screw portion 11, the cap body 7 can be removably attached to the container body 2 by threading the female screw portion provided on the inner surface of the mouth-neck portion 2c with the male screw portion provided on the peripheral wall portion 12b of the mouth-forming member 12.

[0079] Furthermore, the cap unit 1 is configured such that the lid 9 is attached to the cap body 7 via the hinge portion 8 so as to be freely opened and closed, but the configuration is not necessarily limited to this. For example, the cap body 7 may be configured to directly open and close the upper opening 2d of the container body 2.

[0080] In this configuration, the cap body can have an outer lid that covers the upper opening of the container body and an inner plug that is fitted into the inside of the container body from the upper opening, and the inner plug or the outer lid can be attached to the cap body by screwing. Also, the waterproof gasket 23 can be attached to the outer periphery of the inner plug.

[0081] In the above embodiment, the present invention is applied to a beverage container that is suitable for storing the above-mentioned carbonated beverage in the container body 2, but the beverage (liquid) stored in the container body is not particularly limited. In addition, in the above embodiment, the present invention is applied to a beverage container that has a cold-keeping function (or a hot-keeping function) provided by the container body 2 having the above-mentioned vacuum insulation structure, but the present invention can be widely applied to a capped container that includes a container body and a cap unit that can be detachably attached to the container body. [Explanation of symbols]

[0082] 100...container with cap 1, 1A, 1B...cap unit 2...container body 3...outer container 4...inner container 5...vacuum insulation layer 6...extension 7...cap body 9...lid body 10...female thread portion 11...male thread portion 12...mouth forming member 13...liquid passage port 14...vent port 15...detachment mechanism 23...watertight packing 23a...fitting convex portion (other fitting portion) 23b...elastic flange portion 23c...elastic sleeve portion 23d...fitting recess (other fitting portion) 24...fitting recess (one fitting portion) 24a...fitting convex portion (one fitting portion) 24b...flange portion 25...closure member 28...lid locking mechanism

Claims

1. A cap unit that can be detachably attached to a container body having an open top, a cap body that closes the upper opening of the container body; a waterproof packing that is detachably attached to the cap body and seals the gap between the container body and the cap body; the cap body has a ring-shaped fitting portion on an outer peripheral surface of a portion that fits into the inside of the container body from the upper opening, the waterproof gasket is made of a ring-shaped elastic member that contacts a protruding portion that protrudes from the inside of the container body around the entire circumference when the cap body is attached to the container body, and a ring-shaped second fitting portion that is fitted into the first fitting portion, an elastic flange portion that protrudes from the outer peripheral surface of the second fitting portion in a radially expanding direction along the entire circumference, and an elastic sleeve portion that protrudes downward from between the second fitting portion and the elastic flange portion along the entire circumference, The lower surface of the elastic flange portion is in contact with the inlet surface of the protruding portion, and the outer peripheral surface of the elastic sleeve portion is in contact with the top surface of the protruding portion, The cap unit is characterized in that the inner peripheral surface of the elastic sleeve portion is provided continuously downward from the lower surface of the other fitting portion.

2. The cap unit described in claim 1, characterized in that the waterproof gasket elastically displaces the elastic sleeve portion in the direction in which the outer surface of the elastic sleeve portion contacts the top surface of the protrusion portion by elastically deforming the elastic flange portion along the inlet surface of the protrusion portion.

3. 3. The cap unit according to claim 1, wherein the elastic sleeve portion has a shape in which the diameter gradually increases downward.

4. 4. The cap unit according to claim 1, wherein the elastic flange portion is located on a lower end side of an outer circumferential surface of the other fitting portion.

5. the one fitting portion has a shape whose width gradually increases from its bottom side toward its opening side, 5. The cap unit according to claim 1, wherein the other fitting portion has a shape whose width gradually narrows from its base end toward its tip end.

6. 6. The cap unit according to claim 1, wherein the elastic member is made of fluororubber.

7. 7. The cap unit according to claim 1, wherein the cap body is attached to the container body by screwing.

8. A cap unit according to any one of claims 1 to 7; A capped container comprising: a container body to which the cap unit is attached.

9. 9. The capped container according to claim 8, wherein the container body has a vacuum insulation structure.

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