Cap unit and container having cap

Abstract

To provide a cap unit capable of maintaining good sealing of a fluid passage.SOLUTION: A cap unit comprises: a cap body 8 having a fluid passage hole 12 communicating with the inside of a container body 2; an outer lid 17 covering the cap body 8; a lid body 9 having an intermediate plug 18 that is fitted into the inside of the cap body 8 and blocks the fluid passage hole 12; and a waterproof packing 14 that is attached to an outer periphery of a lower end side of the cap body 8 and seals a space between the inside of the container body 2 and the cap body 8. The waterproof packing 14 has a lower side protruding portion 14c that blocks a gap S between the intermediate plug 18 and the cap body 8. The lower side protruding portion 14c is provided so that it protrudes in a direction of reduced diameter with respect to a lower end of the cap body 8 while undergoing elastic deformation, and contacts around an outer periphery of a bottom wall portion of the intermediate plug 18 over an entire circumference when the intermediate plug 18 blocks the fluid passage hole 12.SELECTED DRAWING: Figure 1

Description

Technical Field

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

Background Art

[0002] Conventionally, there has been a container with a cap provided with a cap unit (plug body) that is detachably attached to a container body having an open upper portion. Further, among cap units, there are those provided with a cap body that is attached to the mouth neck portion of a container body having an open upper portion and is provided with a liquid passage hole communicating with the inside of the container body, and a lid body that opens and closes the liquid passage hole (for example, refer to Patent Document 1 below).

[0003] Specifically, Patent Document 1 below discloses a structure in which a lid body is detachably attached to a cap body by screwing a female screw portion provided on the inner peripheral portion of the cap body and a male screw portion provided on the outer peripheral portion of an inner plug that closes the liquid passage hole while being fitted inside the cap body and covering the outside of the cap body.

[0004] Further, Patent Document 1 below discloses a structure in which a water stop packing attached to the outer peripheral portion on the lower end side of the cap body seals between the inside of the container body and the cap body, and a lid packing attached to the outer peripheral portion of the inner plug seals between the inside of the cap body and the inner plug.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] By the way, in the conventional container with a cap described above, when the container body is inverted by reversing its top and bottom, the beverage (liquid) contained in the container body may leak through the gap between the cap body and the inner stopper over the lid packing and into the inside of the liquid passage hole.

[0007] In particular, when the container body falls in an inverted state, the beverage contained in the container body may press the lid packing due to the impact when colliding with the ground or the like, and the lid packing may shift from the outer peripheral portion of the inner stopper. In this case, it is difficult to maintain good sealing performance of the liquid passage hole by the lid packing.

[0008] The present invention has been proposed in view of such conventional circumstances, and aims to provide a cap unit capable of maintaining good sealing performance of a liquid passage hole, and a container with a cap that enables further improvement in usability by including such a cap unit.

Means for Solving the Problems

[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-neck portion of a container body with an open top, and is provided with a liquid passage hole that communicates with the inside of the container body, A lid body that is attached to the cap body and covers the cap body, and includes an outer lid and an inner stopper that closes the liquid passage hole in a state of being fitted inside the cap body, A water-stop packing that is attached to the outer peripheral portion on the lower end side of the cap body and seals the space between the inside of the container body and the cap body, The water-stop packing has a lower surface side protruding portion that closes the gap between the inner stopper and the cap body, The lower surface side protruding portion is provided to protrude in the diameter-reducing direction from the lower end portion of the cap body while elastically deforming, A cap unit characterized in that, in a state where the inner stopper closes the liquid passage hole, it is in contact with the vicinity of the outer periphery of the bottom wall portion of the inner stopper over the entire circumference. 〔2〕 The water stop packing has a downward bending portion where the tip side of the lower surface side protrusion is bent downward, and in a state where the middle plug closes the liquid passage hole, the downward bending portion is separated from the lower surface of the middle plug. The cap unit according to 〔1〕 above is characterized by this. 〔3〕 A part of the upper surface of the lower surface side protrusion is in contact with the outer periphery of the bottom wall portion of the middle plug over the entire circumference. The cap unit according to 〔1〕 above is characterized by this. 〔4〕 The lid body is detachably attached to the cap body by screwing a female screw portion provided on the inner peripheral portion of the cap body and a male screw portion provided on the outer peripheral portion of the middle plug. The cap unit according to any one of 〔1〕 to 〔3〕 above is characterized by this. 〔5〕 A cap unit according to any one of 〔1〕 to 〔4〕 above, and a container body to which the cap unit is attached. A container with a cap comprising the same.

Advantages of the Invention

[0010] As described above, according to the present invention, it is possible to provide a cap unit that can maintain good sealing performance of the liquid passage hole, and a container with a cap that can further improve usability by including such a cap unit.

Brief Description of the Drawings

[0011]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Mode for Carrying Out the Invention

[0012] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. As one embodiment of the present invention, for example, a container 100 with a cap provided with a cap unit 1 shown in FIGS. 1 to 6 will be described.

[0013] Note that FIG. 1 is a cross-sectional view showing the configuration of the container 100 with a cap provided with the cap unit 1. FIG. 2 is a perspective view of the configuration of the cap unit 1 viewed from the lower side. 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 viewed from the upper side. FIG. 5 is an exploded perspective view of the configuration of the cap unit 1 viewed from the lower side. FIG. 6 is a cross-sectional view of the main part showing the inverted state of the container 100 with a cap.

[0014] As shown in FIG. 1, the container 100 with a cap in the present embodiment includes the cap unit 1 of the present embodiment and a container body 2 to which the cap unit 1 is detachably attached. The container 100 with a cap is a beverage container capable of keeping warm or cold the beverage (liquid) stored in the container body 2 by the container body 2 having a vacuum heat insulation structure.

[0015] Specifically, this container body 2 has a bottomed cylindrical outer container 3 and an inner container 4 made of, for example, stainless steel or the like, and is configured by a double - structure container in which the inner container 4 is housed inside the outer container 3 and their mouth parts are joined together. Further, 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 closing the degassing holes provided at the center of the bottom surface of the outer container 3 in a chamber that has been depressurized (evacuated) to a high vacuum.

[0016] The container body 2 has a substantially circular bottom surface portion 2a, a body portion 2b that stands up in a substantially cylindrical shape from the outer periphery of the bottom surface portion 2a, and a substantially cylindrical mouth neck portion 2c that has a reduced diameter on the upper side of the body portion 2b. Further, the upper end portion of the mouth neck portion 2c opens in a circular shape as the upper opening portion 2d of the container body 2.

[0017] The inner peripheral surface of the mouth neck portion 2c has a smaller diameter than the inner peripheral surface of the body portion 2b. Further, 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 thread that spirally projects downward from the upper end side of the mouth neck portion 2c. Further, below the first female screw portion 6, a ring - shaped overhanging portion 7 is provided so as to project from the inner peripheral surface of the container body 2 over the entire circumference.

[0018] Note that the capped container 100 of the present embodiment has a substantially cylindrical outer shape as a whole, but the outer shape of the capped container 100 is not particularly limited, and can be appropriately changed according to the size, design, etc. Further, the outer peripheral surface of the container body 2 may be painted, printed, or the like.

[0019] As shown in FIGS. 1 to 5, the cap unit 1 of the present embodiment constitutes a plug body that closes the upper opening portion 2d of the container body 2, and includes a cap body 8 and a lid body 9 that is detachably attached to the cap body 8.

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

[0021] In the cap body 8, a locking convex portion 10a provided on the inner peripheral surface of the outer cylinder member 10 is locked to a locking concave portion 11a provided on the outer peripheral surface of the inner cylinder member 11, whereby the inner cylinder member 11 penetrating the outer cylinder member 10 is integrally attached to the outer cylinder member 10. Regarding the outer cylinder member 10, in addition to the above-mentioned PP, it is also possible to use a thermoplastic resin such as acrylonitrile-butadiene-styrene (ABS).

[0022] Inside the inner cylinder member 11 (cap body 8), a liquid passage hole 12 serving as a drinking port or a pouring port is provided. The liquid passage hole 12 includes a tapered hole portion 12a whose diameter gradually decreases downward from the upper end of the inner cylinder member 11 (cap body 8), a first straight hole portion 12b having the same diameter downward from the lower end of the tapered hole portion 12a, a stepped portion 12c having a diameter smaller than that of the first straight hole portion 12b at the lower end of the first straight hole portion 12b, and a second straight hole portion 12d having the same diameter downward from the stepped portion 12c.

[0023] On the outer peripheral surface of the lower side of the inner cylinder member 11 sandwiching the outer cylinder member 10, a first male screw portion 13 is provided. The first male screw portion 13 is composed of a thread spirally protruding upward from the lower end side of the inner cylinder member 11. Thereby, the cap body 8 is detachably attached to the mouth-neck portion 2c of the container body 2 by screwing the threads constituting the first female screw portion 6 and the first male screw portion 13 together.

[0024] On the outer peripheral portion of the lower end side of the inner cylinder member 11 (cap body 8), a water stop packing 14 is detachably attached. The water stop packing 14 is a ring-shaped sealing member that seals between the inside of the container body 2 and the cap body 8, and is made of an elastic member such as a heat-resistant rubber or elastomer such as silicone rubber.

[0025] On the outer peripheral portion of the lower end side of the inner cylinder member 11, a flange portion 11b is provided so as to project in the diameter-expanding direction. On the other hand, on the inner peripheral surface of the water stop packing 14, a ring-shaped fitting recess 14a is provided over the entire circumference. The water stop packing 14 is fitted over the entire outer peripheral portion of the lower end side of the inner cylinder member 11 in a state where the flange portion 11b is fitted into the fitting recess 14a.

[0026] Further, on the outer peripheral surface of the water stop packing 14, a plurality (two in this embodiment) of elastic flange portions 14b arranged in the vertical direction are provided so as to project in the diameter-expanding direction. When the cap body 8 is attached to the mouth-neck portion 2c of the container body 2, the water stop packing 14 is in a state of being in close contact with the overhanging portion 7 of the container body 2 over the entire circumference while the elastic flange portion 14b is elastically deformed. Thereby, it is possible to seal between the overhanging portion 7 (inside the container body 2) and the inner cylinder member 11 (cap body 8).

[0027] Also, it is preferable that the lower elastic flange portion 14b of the water stop packing 14 contacts the upper side of the top of the overhanging portion 7 and the upper elastic flange portion 14b contacts the inlet side of the overhanging portion 7. Thereby, the sealing performance between the overhanging portion 7 (inside the container body 2) and the inner cylinder member 11 (cap body 8) can be improved.

[0028] On the other hand, the water stop packing 14 can be removed from the outer peripheral portion of the lower end side of the inner cylinder member 11 (cap body 8) by elastically deforming (stretching) itself. Thereby, the water stop packing 14 and the cap body 8 can be washed separately, and the space between the water stop packing 14 and the cap body 8 can be kept hygienic.

[0029] Note that the water stop packing 14 is not necessarily limited to the shape described above. For example, the number of elastic flange portions 14b is not limited to the two described above, and may be one or three or more. Further, the water stop packing 14 is not necessarily limited to the configuration provided with the elastic flange portion 14b described above, and its shape and the like can be appropriately changed.

[0030] The outer peripheral surface of the outer cylinder member 10 (cap body 8) is formed in a substantially cylindrical shape so as to be flush with the body portion 2b of the container body 2. Further, a second female screw portion 15 is provided on the inner peripheral surface of the inner cylinder member 11 (cap body 8). The second female screw portion 15 is composed of a plurality (four in this embodiment) of thread ridges protruding from the position where the second straight hole portion 12d of the inner cylinder member 11 is formed. Further, a plurality of gaps 15a are provided between these plurality of thread ridges for returning the beverage (liquid) remaining inside the inner cylinder 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 mouth portion 16 that gradually increases in diameter toward the upper end in accordance with the shape of the tapered hole portion 12a. Thereby, the beverage (liquid) flowing out from the liquid passage hole 12 can be made easier to drink or pour.

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

[0033] The outer lid 17 is a portion 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 peripheral surface of the outer cylinder member 10 (cap body 8), and a top wall portion 17b that covers the upper portion of the peripheral wall portion 17a. The inner stopper 18 is a portion that closes the liquid passage hole 12 in a state of being fitted inside the cap body 8, and has a substantially circular bottom wall portion 18a and a peripheral wall portion 18b that rises substantially cylindrically from the periphery of the bottom wall portion 18a.

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

[0035] A second male screw portion 20 is provided on the outer peripheral surface of the peripheral wall portion 18b (middle plug 18). The second male screw portion 20 is composed of a pair of screw grooves spirally cut out upward from the lower end of the peripheral wall portion 18b. Thereby, the middle plug 18 (lid body 9) is detachably attached to the inner peripheral portion of the inner cylinder member 11 (cap body 8) by screwing the thread ridges constituting the second female screw portion 15 into the screw grooves constituting the second male screw portion 20, respectively.

[0036] Also, the second male screw portion 20 is composed of a two-start screw that is complementary to each other. When a two-start screw is used, it is possible to attach and detach the lid body 9 to and from the cap body 8 with a small rotational operation (about 160° in this embodiment).

[0037] A lid packing 21 is detachably attached to the outer peripheral portion of the middle plug 18. The lid packing 21 is a ring-shaped seal member that seals between the liquid passage hole 12 (inside the cap body 8) and the middle plug 18, and like the water stop packing 14, it is made of an elastic member such as a rubber or elastomer having heat resistance, such as silicone rubber.

[0038] On the other hand, a ring-shaped groove portion 22 is provided over the entire circumference on the outer peripheral surface of the peripheral wall portion 18b (middle plug 18). The lid packing 21 is fitted over the entire circumference in this groove portion 22.

[0039] On the outer peripheral surface of the lid packing 21, a plurality (two in this embodiment) of elastic flange portions 21a arranged in the vertical direction protrude in the diameter-expanding direction. When the lid body 9 is attached to the cap body 8, the lid packing 21 is in a state of being in close contact with the liquid passage hole 12 over the entire circumference while the elastic flange portion 21a is elastically deformed. Thereby, it is possible to seal between the liquid passage hole 12 (inside the cap body 8) and the middle plug 18.

[0040] Further, when the middle plug 18 closes the liquid passage hole 12, it is preferable that the elastic flange portion 21a of the lid packing 21 is in a state of being 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. Thereby, when removing the lid body 9 from the cap body 8, it is possible to open between the liquid passage hole 12 (inside the cap body 8) and the middle plug 18 only by slightly moving the elastic flange portion 21a from the state of being in close contact with the first straight hole portion 12b to the tapered hole portion 12a side.

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

[0042] Note that the lid packing 21 is not necessarily limited to the one having the above-described shape. For example, the number of the elastic flange portions 21a is not limited to two described above, and can be one or three or more. Further, the lid packing 21 is not necessarily limited to the configuration provided with the above-described elastic flange portion 21a, and its shape and the like can be appropriately changed.

[0043] By the way, in the cap unit 1 of the present embodiment, as shown in FIG. 1, the water stop packing 14 has a lower surface side protruding portion 14c that closes the gap S between the middle plug 18 and the cap body 8.

[0044] The lower surface side protruding portion 14c is provided so as to protrude in the diameter-reducing direction from the lower end portion of the cap body 8. As a result, the lower surface side protruding portion 14c is in contact with the vicinity of the outer periphery of the bottom wall portion 18a of the middle plug 18 over the entire circumference in a state where the middle plug 18 closes the liquid passage hole 12.

[0045] Note that the water-stopping property due to the contact between the lower surface side protruding portion 14c and the vicinity of the outer peripheral portion of the bottom wall portion 18a does not need to be completely sealed, and it is sufficient if it has a water-stopping property such that the beverage does not fill the space formed between the middle plug 18, the cap body 8, the lid packing 21, and the lower surface side protruding portion 14c during dropping.

[0046] In the cap unit 1 of the present embodiment, as shown in FIG. 6, even when the cap-equipped container 100 is inverted up and down to invert the container body 2, the lower surface side protruding portion 14c closes the gap S between the middle plug 18 and the cap body 8, preventing the beverage (liquid) accommodated in the container body 2 from leaking from this gap S through the gap 15a, over the lid packing 21, and into the inside of the liquid passage hole 12.

[0047] Further, in the cap unit 1 of the present embodiment, as shown in FIG. 6, the groove portion 22 has an upper wall surface 22a facing the upper surface of the lid packing 21, a lower wall surface 22b facing the lower surface of the lid packing 21, and an inner wall surface 22c that contacts the inner peripheral surface of the lid packing 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 diameter-expanding direction from the lower wall surface 22b. Specifically, the outer peripheral end portion of the upper wall surface 22a is located on the outer peripheral side of the base end portion of the elastic flange portion 21a and on the inner peripheral side of the tip end portion of the elastic flange portion 21a. On the other hand, the outer peripheral end portion of the lower wall surface 22b is located on the inner peripheral side of the base end portion of the elastic flange portion 21a. As a result, in a state where the lid packing 21 is fitted in the groove portion 22, it is difficult for the lid packing 21 to roll up upward from the inside of the groove portion 22.

[0049] Therefore, in the cap unit 1 of the present embodiment, as shown in FIG. 6, even when the capped container 100 falls in an inverted state, the beverage contained in the container body 2 is pressed against the lid packing 21 by the impact when hitting the ground or the like, and it is possible to prevent the lid packing 21 from shifting out of the groove portion 22.

[0050] Further, in the cap unit 1 of the present embodiment, by the lower surface side protruding portion 14c closing the gap S between the inner stopper 18 and the cap body 8 described above, it is possible to suppress the beverage contained in the container body 2 from pressing the lid packing 21.

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

[0052] Note that 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 have a configuration in which another water stop packing 14A as shown in FIGS. 7 and 8 is attached. Note that FIG. 7 is a cross-sectional view showing the configuration of the water stop packing 14A. FIG. 8 is a cross-sectional view showing the cap unit 1 to which the water stop packing 14A is attached.

[0053] Specifically, as shown in FIG. 7, the water stop packing 14A has an upward bending portion 14d in which the tip side of the lower surface side protruding portion 14c bends upward.

[0054] In the cap unit 1 to which this water stop packing 14A is attached, as shown in FIG. 8, in a state where the inner stopper 18 closes the liquid passage hole 12, the upward bending portion 14d elastically deforms while the lower surface side protruding portion 14c is in contact with the vicinity of the outer periphery of the bottom wall portion 18a of the inner stopper 18 over the entire circumference.

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

[0056] On the other hand, the cap unit 1 may have a configuration in which another water stop packing 14B as shown in FIGS. 9 and 10 is attached. Note that FIG. 9 is a cross-sectional view showing the configuration of the water stop packing 14B. FIG. 10 is a cross-sectional view showing the cap unit 1 to which the water stop packing 14B is attached.

[0057] Specifically, as shown in FIG. 9, the water stop packing 14B has a downward bending portion 14e in which the tip side of the lower surface side protruding portion 14c is bent downward.

[0058] In the cap unit 1 to which this water stop packing 14B is attached, as shown in FIG. 10, in a state where the stopper 18 closes the liquid passage hole 12, the lower surface side protruding portion 14c contacts the vicinity of the outer periphery of the bottom wall portion 18a of the stopper 18 over the entire circumference, and the downward bending portion 14e is separated from the lower surface of the stopper 18.

[0059] In the case of this configuration, the downward bending portion 14e of the water stop packing 14B is easy to grip. Thereby, it is possible to easily remove the water stop packing 14 from the stopper 18 (lid body 9).

[0060] Regarding the water stop packings 14, 14A, and 14B, in a state where the stopper 18 closes the liquid passage hole 12, the lower surface side protruding portion 14c is separated from the vicinity of the outer periphery of the bottom wall portion 18a of the stopper 18, and when pressed by the beverage contained in the container body 2, the lower surface side protruding portion 14c may be configured to be in contact with the outer peripheral portion on the lower surface side of the stopper 18 while being elastically deformed.

[0061] In the above embodiment, the capped container 100 having the heat insulation and cold insulation functions by the container body 2 having the above-described vacuum heat insulation structure is exemplified, but the present invention can be applied to a capped container provided with a container body having no vacuum heat insulation structure.

Explanation of reference numerals

[0062] 100... Container with a cap 1... Cap unit 2... Container body 6... First female screw portion 7... Overhanging portion 8... Cap body 9... Lid 10... Outer cylinder member 11... Inner cylinder member 12... Liquid passage hole 13... First male screw portion 14, 14A, 14B... Sealing packing 14c... Lower surface side protruding portion 14d... Upward bending portion 14e... Downward bending portion 15... Second female screw portion 17... Outer lid 18... Plug 20... Second male screw portion 21... Lid packing 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 attached to the cap body and includes an outer cover that covers the cap body and an inner plug that closes the liquid passage hole when fitted inside the cap body; a waterproof packing that seals the gap between the inside of the container body and the cap body when attached to the outer periphery of the lower end side of the cap body; The water-stopping gasket has a lower surface side protrusion that closes a gap between the inside plug and the cap body, The lower surface side protrusion is provided so as to protrude in a diameter reducing direction from a lower end portion of the cap body while being elastically deformed, and A cap unit characterized in that, when the inner plug is in a state where the inner plug closes the liquid passage hole, the cap unit is in contact with the vicinity of the outer periphery of the bottom wall portion of the inner plug over the entire circumference.

2. The water-stopping gasket has a downwardly bent portion in which a tip side of the lower surface side protrusion is bent downward, 2. The cap unit according to claim 1, wherein the downward bent portion is spaced apart from a lower surface of the inside plug when the inside plug closes the liquid passage hole.

3. 2. The cap unit according to claim 1, wherein a part of the upper surface of the lower surface side protrusion is in contact with the vicinity of the outer periphery of the bottom wall portion of the inside plug over the entire circumference.

4. A cap unit as described in any one of claims 1 to 3, characterized in that 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 plug.

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.

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