Cap unit and container with cap

Abstract

To provide a cap unit capable of maintaining an excellent sealing of a ventilation hole.SOLUTION: A cap unit comprises a cap body 8 provided with a liquid passage hole 12 connected to the inside of a container body 2, an outer lid 17 that covers the outside of the cap body 8, a lid body 9 provided with a stopper 18 that closes the liquid passage hole 12 when fitted into the inside of the cap body 8 and a lid packing 21 that seals between the inside of the cap body 8 and the stopper 18 when fitted around an outer periphery of the stopper 18. The lid packing 21 is fitted into a ring-shaped groove 22 provided around the outer periphery of the stopper 18, and the groove 22 has an upper wall surface 22a facing an upper surface of the lid packing 21 and a lower wall surface 22b facing a lower surface of the lid packing 21, and an inner wall surface 22c that contacts an inner peripheral surface of the lid packing 21 between the upper wall surface 22a and the lower wall surface 22b, and the upper wall surface 22a protrudes in a direction of diameter expansion more than the lower wall surface 22b.SELECTED DRAWING: Figure 6

Description

[Technical field]

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

[0002] Conventionally, there are capped containers that include a cap unit (plug) that can be detachably attached to a container body that is open at the top. Some cap units include a cap body that is attached to the mouth and neck of the container body that is open at the top and has a liquid passage hole that communicates with the inside of the container body, and a lid that opens and closes the liquid passage hole (for example, see Patent Document 1 below).

[0003] Specifically, Patent Document 1 listed below discloses a structure having an outer lid that covers the outside of the cap body and an inner stopper that blocks the liquid passage hole when fitted inside the cap body, in which the lid body is removably attached to the cap body by screwing together a female threaded portion provided on the inner circumference of the cap body and a male threaded portion provided on the outer circumference of the inner stopper.

[0004] In addition, the following Patent Document 1 discloses a structure in which a waterproof gasket attached to the outer periphery of the lower end side of the cap body seals the space between the inside of the container body and the cap body, and a lid gasket attached to the outer periphery of the inner stopper seals the space between the inside of the cap body and the inner stopper. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2014-162544 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, in the conventional capped container described above, when the container body was turned upside down, the beverage (liquid) contained in the container body could leak out through the gap between the cap body and the inner stopper, over the lid gasket, and into the inside of the liquid passage hole.

[0007] In particular, when the container body is dropped upside down, the beverage contained in the container body may press against the lid gasket due to the impact of hitting the ground, causing the lid gasket to become displaced from the outer periphery of the inner plug. In this case, it is difficult to maintain a good seal of the liquid passage hole with the lid gasket.

[0008] The present invention has been proposed in consideration of the above-mentioned conventional circumstances, and aims to provide a cap unit that makes it possible to maintain good sealing of the liquid passage hole, and a capped container that is equipped with such a cap unit, thereby making it possible to further improve usability. [Means for solving the problem]

[0009] In order to achieve the above object, the present invention provides the following means. [1] A cap body that is detachably attached to the mouth and neck of a container body having an open top and has a liquid passage hole that communicates with the inside of the container body; a cover body that is detachably attached to the cap body and has an outer cover that covers the outside of the cap body and an inner plug that closes the liquid passage hole when fitted inside the cap body; a lid packing that seals a gap between the inside of the cap body and the inner plug in a state where the lid packing is attached to the outer periphery of the inner plug; 、 a waterproof packing that seals the gap between the inside of the container body and the cap body; Equipped with The lid packing is attached in a state where it is fitted into a ring-shaped groove provided on an outer periphery of the inside plug, the groove portion has an upper wall surface facing an upper surface of the lid gasket, a lower wall surface facing a lower surface of the lid gasket, and an inner wall surface in contact with an inner circumferential surface of the lid gasket between the upper wall surface and the lower wall surface, The upper wall surface is provided so as to protrude in a radially expanding direction from the lower wall surface. 、 The water-stopping packing has a lower surface side protrusion that closes the gap between the inside plug and the cap body. A cap unit characterized by: [2] The lid packing has an elastic flange portion protruding from its outer circumferential surface in a radially expanding direction, The cap unit described in [1] above is characterized in that the elastic flange portion is in close contact with the inside of the cap body, thereby sealing the space between the inside of the cap body and the inner plug. [3] The cap unit described in [2], characterized in that the outer peripheral end of the upper wall surface is located outer than the base end of the elastic flange portion and inner than the tip end of the elastic flange portion. [4] The cap unit according to [2] or [3], characterized in that the outer peripheral end of the lower wall surface is located on the inner peripheral side of the base end of the elastic flange portion. 。 [ 5 The above [1] to [ 4 and a cap unit according to any one of the above items (1) to (4). A capped container comprising: a container body to which the cap unit is attached. Effect of the Invention

[0010] As described above, according to the present invention, it is possible to provide a cap unit that enables the liquid passage hole to be kept well sealed, and a capped container that, by being equipped with such a cap unit, allows for further improvement in usability. [Brief description of the drawings]

[0011] [Figure 1] 1 is a cross-sectional view showing a configuration of a capped container equipped with a cap unit according to one embodiment of the present invention. [Diagram 2] 2 is a perspective view of the configuration of the cap unit shown in FIG. 1, as viewed from below. [Diagram 3] 2 is a bottom view showing the configuration of the cap unit shown in FIG. 1. [Figure 4] 2 is an exploded perspective view of the configuration of the cap unit shown in FIG. 1, as viewed from above. [Diagram 5] 2 is an exploded perspective view of the configuration of the cap unit shown in FIG. 1, as viewed from below. [Figure 6] 2 is a cross-sectional view of a main part showing an inverted state of the capped container shown in FIG. 1. [Figure 7] FIG. 4 is a cross-sectional view showing another configuration of the watertight gasket. [Figure 8] 8 is a cross-sectional view showing a cap unit to which the waterproof gasket shown in FIG. 7 is attached. [Figure 9] FIG. 4 is a cross-sectional view showing another configuration of the watertight gasket. [Figure 10] 10 is a cross-sectional view showing a cap unit to which the waterproof gasket shown in FIG. 9 is attached. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Hereinafter, an embodiment 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, for example, FIGS. 1 to 6 will be described.

[0013] FIG. 1 is a cross-sectional view showing the configuration of a capped container 100 equipped with a cap unit 1. FIG. 2 is a perspective view of the configuration of the cap unit 1 seen from below. FIG. 3 is a bottom view showing the configuration of the cap unit 1. FIG. 4 is an exploded perspective view of the configuration of the cap unit 1 seen from above. FIG. 5 is an exploded perspective view of the configuration of the cap unit 1 seen from below. FIG. 6 is a cross-sectional view of the essential parts of the capped container 100 in an inverted state.

[0014] 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 a beverage (liquid) contained in the container body 2 hot or cold by the container body 2 having a vacuum insulation structure.

[0015] Specifically, the container body 2 has a bottomed cylindrical outer container 3 and inner container 4 made of, for example, stainless steel, and is configured as a double-structure container in which the mouths of the outer container 3 and inner container 4 are joined together while the inner container 4 is 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 degassing hole provided in the center of the bottom surface of the outer container 3 in a chamber that has been reduced to a high vacuum (evacuated).

[0016] The container body 2 has a substantially circular bottom surface 2a, a body portion 2b that stands 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 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 portion 2d of the container body 2.

[0017] The inner peripheral surface of the mouth / neck portion 2c is smaller in diameter than the inner peripheral surface of the body portion 2b. A first female screw portion 6 is provided on the inner peripheral surface of the mouth / neck portion 2c. The first female screw portion 6 is composed of a screw thread that protrudes downward in a spiral shape from the upper end side of the mouth / neck portion 2c. Furthermore, below the first female screw portion 6, a ring-shaped protruding portion 7 is provided protruding from the inner peripheral surface of the container body 2 all around.

[0018] Although the capped container 100 of this embodiment has a generally cylindrical external shape as a whole, the external shape of the capped container 100 is not particularly limited and can be appropriately changed according to the size, design, etc. In addition, the outer peripheral surface of the container body 2 may be painted, printed, or the like.

[0019] As shown in Figures 1 to 5, the cap unit 1 of this embodiment constitutes a stopper body that closes the upper opening 2d of the container body 2, and comprises a cap body 8 and a lid body 9 that can be attached to the cap body 8 in a freely detachable manner.

[0020] The cap body 8 has a cylindrical outer tube member 10 and an inner tube member 11 made of a heat-resistant resin such as polypropylene (PP). The cap body 8 may have a configuration in which the outer tube member 10 and the inner tube member 11 are integrally formed.

[0021] In the cap body 8, the locking protrusion 10a provided on the inner peripheral surface of the outer tube member 10 is locked into the locking recess 11a provided on the outer peripheral surface of the inner tube member 11, so that the inner tube member 11 penetrating the outer tube member 10 is integrally attached to the outer tube member 10. Note that, in addition to the above-mentioned PP, the outer tube member 10 can also be made of a thermoplastic resin such as acrylonitrile butadiene styrene (ABS).

[0022] A liquid passage hole 12 that serves as a drinking spout or a pouring spout is provided inside the inner cylinder member 11 (cap body 8). The liquid passage hole 12 has a tapered hole section 12a that gradually reduces in diameter from the upper end of the inner cylinder member 11 (cap body 8) downward, a first straight hole section 12b that has a constant diameter from the lower end of the tapered hole section 12a downward, a step section 12c at the lower end of the first straight hole section 12b that is smaller in diameter than the first straight hole section 12b, and a second straight hole section 12d that has a constant diameter from the step section 12c downward.

[0023] A first male screw portion 13 is provided on the outer peripheral surface of the lower side of the inner tube member 11 sandwiching the outer tube member 10. The first male screw portion 13 is composed of a screw thread that protrudes in a spiral shape upward from the lower end side of the inner tube member 11. As a result, the cap body 8 is detachably attached to the mouth neck portion 2c of the container body 2 by screwing together the screw threads that constitute the first female screw portion 6 and the first male screw portion 13.

[0024] A waterproof gasket 14 is detachably attached to the outer periphery of the lower end side of the inner tube member 11 (cap body 8). The waterproof gasket 14 is a ring-shaped sealing member that seals the gap between the inside of the container body 2 and the cap body 8, and is made of an elastic material such as heat-resistant rubber, elastomer, etc., such as silicone rubber.

[0025] A flange portion 11b is provided on the outer periphery of the lower end side of the inner cylindrical member 11 so as to protrude in the radially expanding direction. Meanwhile, a ring-shaped fitting recess 14a is provided around the entire circumference on the inner periphery surface of the watertight gasket 14. The watertight gasket 14 is fitted around the outer periphery of the lower end side of the inner cylindrical member 11 with the flange portion 11b fitted into the fitting recess 14a.

[0026] Additionally, a plurality of elastic flange portions 14b (two in this embodiment) arranged in the vertical direction are provided on the outer peripheral surface of the watertight gasket 14, protruding in the radial expansion direction. When the cap body 8 is attached to the mouth neck portion 2c of the container body 2, the watertight gasket 14 is brought into close contact with the overhanging portion 7 of the container body 2 over the entire circumference while the elastic flange portions 14b are elastically deformed. This makes it possible to seal the gap between the overhanging portion 7 (inside of the container body 2) and the inner tube member 11 (cap body 8).

[0027] Moreover, it is preferable that the lower elastic flange portion 14b of the waterproof packing 14 contacts the top side of the overhanging portion 7 and the upper elastic flange portion 14b contacts the inlet side of the overhanging portion 7. This can improve the airtightness between the overhanging portion 7 (the inside of the container body 2) and the inner tube member 11 (cap body 8).

[0028] On the other hand, the watertight gasket 14 can be removed from the outer periphery of the lower end side of the inner tube member 11 (cap body 8) by elastically deforming (pulling and stretching) the watertight gasket 14 itself. This allows the watertight gasket 14 and the cap body 8 to be washed separately, and the space between the watertight gasket 14 and the cap body 8 can be kept hygienic.

[0029] The watertight packing 14 is not necessarily limited to the shape described above, and for example, the number of elastic flange portions 14b is not limited to the above-mentioned two, but may be one or three or more. The watertight packing 14 is not necessarily limited to a configuration provided with the above-mentioned elastic flange portions 14b, and the shape, etc., may be appropriately changed.

[0030] The outer peripheral surface of the outer tube member 10 (cap body 8) is formed in a substantially cylindrical shape so as to be flush with the trunk portion 2b of the container body 2. A second female screw portion 15 is provided on the inner peripheral surface of the inner tube member 11 (cap body 8). The second female screw portion 15 is composed of a plurality of (four in this embodiment) thread projections protruding from a position forming the second straight hole portion 12d of the inner tube member 11. A plurality of gaps 15a are provided between these plurality of thread projections to return the beverage (liquid) remaining inside the inner tube member 11 (cap body 8) to the container body 2 side.

[0031] The upper side of the inner cylinder member 11 sandwiching the outer cylinder member 10 forms a wide-mouthed portion 16 that gradually widens in diameter toward the upper end in accordance with the shape of the tapered hole portion 12a. This makes it easier to drink or pour the beverage (liquid) that flows out from the liquid passage hole 12.

[0032] The lid body 9 opens and closes the liquid passage hole 12, and has an outer lid 17 and an inner plug 18 made of a heat-resistant resin such as PP.

[0033] The outer lid 17 is a part that covers the outside of the cap body 8, and has a peripheral wall portion 17a formed in a substantially cylindrical shape so as to be flush with the outer circumferential surface of the outer tube member 10 (cap body 8), and a top wall portion 17b that covers the upper part of the peripheral wall portion 17a. The inside plug 18 is a part that closes the liquid passage hole 12 when fitted inside the cap body 8, and has a substantially circular bottom wall portion 18a, and a peripheral wall portion 18b that rises in a substantially cylindrical shape from the periphery of the bottom wall portion 18a.

[0034] The inner plug 18 is located at the center of the inside of the outer lid 17, and the peripheral wall portion 18b is attached integrally to the center of the underside of the top wall portion 17b by welding or the like. A heat insulating material 19 is disposed on the inside of the inner plug 18. Note that, instead of the heat insulating material 19, air (space) serving as a heat insulating layer may be provided on the inside of the inner plug 18.

[0035] A second male screw portion 20 is provided on the outer peripheral surface of the peripheral wall portion 18b (inner plug 18). The second male screw portion 20 is composed of a pair of screw grooves that are spirally cut upward from the lower end of the peripheral wall portion 18b. As a result, the inner plug 18 (lid body 9) is detachably attached to the inner peripheral portion of the inner tube member 11 (cap body 8) by screwing the thread projections that form the second female screw portion 15 into the screw grooves that form the second male screw portion 20.

[0036] In addition, the second male screw portion 20 is a double-threaded screw that is complementary to the cap body 8. When a double-threaded screw is used, the lid body 9 can be attached to and detached from the cap body 8 with a small rotation operation (about 160° in this embodiment).

[0037] A lid gasket 21 is detachably attached to the outer periphery of the inner plug 18. The lid gasket 21 is a ring-shaped sealing member that seals the gap between the liquid passage hole 12 (the inside of the cap body 8) and the inner plug 18, and similar to the watertight gasket 14, is made of an elastic material such as heat-resistant rubber, elastomer, etc., such as silicone rubber.

[0038] Meanwhile, a ring-shaped groove 22 is provided around the entire periphery of the outer circumferential surface of the peripheral wall portion 18b (the inside plug 18). The lid packing 21 is fitted into this groove 22 around the entire periphery.

[0039] A plurality of elastic flange portions 21a (two in this embodiment) arranged in the vertical direction are provided on the outer peripheral surface of the lid packing 21 so as to protrude in the radial direction. When the lid body 9 is attached to the cap body 8, the lid packing 21 is brought into close contact with the liquid passage hole 12 over the entire circumference while the elastic flange portions 21a are elastically deformed. This makes it possible to seal the gap between the liquid passage hole 12 (the inside of the cap body 8) and the inner plug 18.

[0040] Furthermore, it is preferable that the lid packing 21 is in a state in which the elastic flange portion 21a is in close contact with the first straight hole portion 12b near the boundary between the tapered hole portion 12a and the first straight hole portion 12b when the inner plug 18 closes the liquid passage hole 12. As a result, when the lid body 9 is removed from the cap body 8, it is possible to open the gap between the liquid passage hole 12 (the inside of the cap body 8) and the inner plug 18 by simply moving the elastic flange portion 21a slightly from a state in which it is in close contact with the first straight hole portion 12b toward the tapered hole portion 12a side.

[0041] On the other hand, the lid gasket 21 can be removed from the groove portion 22 by elastically deforming (pulling and stretching) itself. This allows the lid gasket 21 and the lid body 9 to be washed separately, and the space between the lid gasket 21 and the lid body 9 can be kept hygienic.

[0042] The lid packing 21 is not necessarily limited to the shape described above, and for example, the number of elastic flange portions 21a is not limited to the above-mentioned two, but may be one or three or more. The lid packing 21 is not necessarily limited to the configuration provided with the above-mentioned elastic flange portions 21a, and the shape, etc., may be appropriately changed.

[0043] In the cap unit 1 of this embodiment, the watertight gasket 14 has a lower surface side protrusion 14c that closes the gap S between the inside plug 18 and the cap body 8, as shown in FIG.

[0044] The lower surface protrusion 14c is provided so as to protrude in the radially reducing direction beyond the lower end of the cap body 8. As a result, when the inner plug 18 closes the liquid passage hole 12, the lower surface protrusion 14c is in contact with the vicinity of the outer periphery of the bottom wall portion 18a of the inner plug 18 over the entire circumference.

[0045] Furthermore, the watertightness provided by contact between the lower protrusion 14c and the outer periphery of the bottom wall 18a does not need to be completely sealed; it is sufficient that the watertightness is sufficient to prevent the space formed between the inner plug 18, cap body 8, lid gasket 21, and lower protrusion 14c from being filled with beverage when dropped.

[0046] In the cap unit 1 of this embodiment, as shown in Figure 6, even if the capped container 100 is turned upside down and the container body 2 is upside down, the bottom protrusion 14c blocks the gap S between the inner stopper 18 and the cap body 8, thereby preventing the beverage (liquid) contained in the container body 2 from leaking from this gap S through the gap 15a, over the lid gasket 21, and into the inside of the liquid passage hole 12.

[0047] In addition, in the cap unit 1 of this embodiment, the groove portion 22 has, as shown in Figure 6, an upper wall surface 22a facing the upper surface of the lid gasket 21, a lower wall surface 22b facing the lower surface of the lid gasket 21, and an inner wall surface 22c that contacts the inner surface of the lid gasket 21 between the upper wall surface 22a and the lower wall surface 22b.

[0048] The upper wall surface 22a is provided so as to protrude in the radial direction more than the lower wall surface 22b. Specifically, the outer peripheral end of the upper wall surface 22a is located more outer than the base end of the elastic flange portion 21a and more inner than the tip end of the elastic flange portion 21a. On the other hand, the outer peripheral end of the lower wall surface 22b is located more inner than the base end of the elastic flange portion 21a. This makes it difficult for the lid packing 21 to roll up from the inside of the groove portion 22 to the upper side when it is fitted into the groove portion 22.

[0049] Therefore, in the cap unit 1 of this embodiment, as shown in Figure 6, even if the capped container 100 is dropped in an upside-down position, the impact of hitting the ground or the like will cause the beverage contained in the container body 2 to press against the lid gasket 21, preventing the lid gasket 21 from slipping out of the groove portion 22.

[0050] In addition, in the cap unit 1 of this embodiment, the gap S between the above-mentioned inner stopper 18 and the cap body 8 is blocked by the lower surface protrusion portion 14c, thereby preventing the beverage contained in the container body 2 from pressing against the lid gasket 21.

[0051] As described above, the cap unit 1 of this embodiment can maintain good sealing of the liquid passage hole 12. Therefore, by providing the capped container 100 of this embodiment with such a cap unit 1, it is possible to further improve usability.

[0052] 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. For example, the cap unit 1 may be configured to have another waterproof packing 14A attached thereto as shown in Fig. 7 and Fig. 8. Fig. 7 is a cross-sectional view showing the configuration of the waterproof packing 14A. Fig. 8 is a cross-sectional view showing the cap unit 1 to which the waterproof packing 14A is attached.

[0053] Specifically, as shown in FIG. 7, the watertight gasket 14A has an upwardly bent portion 14d formed by bending the tip side of the lower surface side protruding portion 14c upward.

[0054] In the cap unit 1 to which this water-stopping gasket 14A is attached, as shown in Figure 8, when the middle plug 18 blocks the liquid passage hole 12, the upward bent portion 14d elastically deforms and the lower surface protruding portion 14c is in contact with the outer periphery of the bottom wall portion 18a of the middle plug 18 around the entire circumference.

[0055] In the case of this configuration, it is possible to improve the adhesion of the lower surface side protrusion 14c to the vicinity of the outer periphery of the bottom wall portion 18a of the inside plug 18.

[0056] On the other hand, the cap unit 1 may be configured to have another waterproof packing 14B attached thereto as shown in Fig. 9 and Fig. 10. Fig. 9 is a cross-sectional view showing the configuration of the waterproof packing 14B. Fig. 10 is a cross-sectional view showing the cap unit 1 to which the waterproof packing 14B is attached.

[0057] Specifically, as shown in FIG. 9, the watertight gasket 14B has a downwardly bent portion 14e in which the tip side of the lower surface side protrusion portion 14c is bent downward.

[0058] In the cap unit 1 to which this water-stopping gasket 14B is attached, as shown in Figure 10, when the middle plug 18 blocks the liquid passage hole 12, the lower surface protrusion 14c contacts the entire outer periphery of the bottom wall portion 18a of the middle plug 18, and the downward bent portion 14e is spaced apart from the underside of the middle plug 18.

[0059] In this configuration, the downward bent portion 14e of the water stop gasket 14B is easy to grasp, which makes it easy to remove the water stop gasket 14 from the inner plug 18 (lid 9).

[0060] In addition, with regard to the above-mentioned water-stopping gaskets 14, 14A, 14B, when the inner plug 18 is blocking the liquid passage hole 12, the lower surface protrusion 14c may be spaced away from the outer periphery of the bottom wall portion 18a of the inner plug 18, and when pressed by the beverage contained in the container body 2, the lower surface protrusion 14c may be elastically deformed and come into contact with the outer periphery of the lower surface of the inner plug 18.

[0061] In the above embodiment, a capped container 100 having heat and cold insulation functions is exemplified by the container body 2 having the above-mentioned vacuum insulation structure, but the present invention can also be applied to a capped container having a container body that does not have a vacuum insulation structure. [Explanation of symbols]

[0062] 100...container with cap 1...cap unit 2...container body 6...first female screw portion 7...projection portion 8...cap body 9...lid body 10...outer tube member 11...inner tube member 12...liquid passage hole 13...first male screw portion 14,14A,14B...water stop gasket 14c...lower surface protrusion portion 14d...upward bent portion 14e...downward bent portion 15...second female screw portion 17...outer lid 18...inner plug 20...second male screw portion 21...lid gasket 21a...elastic flange portion 22...groove portion 22a...upper wall surface 22b...lower wall surface 22c...inner wall surface S...gap

Claims

1. a cap body that is detachably attached to a mouth and neck portion of a container body having an open top and that has a liquid passage hole that communicates with the inside of the container body; a cover body that is detachably attached to the cap body and has an outer cover that covers the outside of the cap body and an inner plug that closes the liquid passage hole when fitted inside the cap body; a lid packing that is attached to an outer periphery of the inside plug and seals a gap between the inside of the cap body and the inside plug; a waterproof packing that seals the gap between the inside of the container body and the cap body, The lid packing is attached in a state where it is fitted into a ring-shaped groove provided on an outer periphery of the inside plug, the groove portion has an upper wall surface facing an upper surface of the lid gasket, a lower wall surface facing a lower surface of the lid gasket, and an inner wall surface in contact with an inner circumferential surface of the lid gasket between the upper wall surface and the lower wall surface, The upper wall surface is provided so as to protrude in a radially expanding direction beyond the lower wall surface, The cap unit is characterized in that the water-stopping gasket has a bottom protrusion that closes the gap between the inner plug and the cap body.

2. The lid packing has an elastic flange portion protruding from an outer circumferential surface thereof in a radially expanding direction, 2. The cap unit according to claim 1, wherein the elastic flange portion is in close contact with the inside of the cap body, thereby sealing the gap between the inside of the cap body and the inside plug.

3. 3. The cap unit according to claim 2, wherein an outer peripheral end of the upper wall surface is located outer than a base end of the elastic flange portion and inner than a tip end of the elastic flange portion.

4. 4. The cap unit according to claim 2, wherein an outer peripheral end of the lower wall surface is located on the inner peripheral side of a base end of the elastic flange portion.

5. A cap unit according to any one of claims 1 to 4, A capped container comprising: a container body to which the cap unit is attached.

Images