Cap unit and container with cap

Abstract

To provide a cap unit which simplifies a structure in which an inside plug is attached to an external cover, and improves washability of the external cover the inside plug.SOLUTION: A cap unit 1A detachably attached to a container body 2 with an opened upper part comprises: an external cover 9 which surrounds the upper part of the container body 2; an inside plug 10 which is fitted in an inner side of the container body 2 from an upper part opening 2a of the container body 2; and a detachment / attachment mechanism 11A which detachably attaches the inside plug 10 to the external cover 9. The detachment / attachment mechanism 11A rotates the inside plug 10 around an axis from a removal position where a central axis of the external cover 9 is eccentric to a central axis of the inside plug 10 to a fitting position where the central axis of the external cover 9 and the central axis of the inside plug 10 are coincident with each other, whereby the inside plug 10 is attached to the external cover 9.SELECTED DRAWING: Figure 2

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 Documents 1 and 2 below).

[0003] Such a cap unit has an outer lid that covers the mouth and neck of the container body and an inner stopper that is fitted into the inside of the container body from the upper opening, and is structured so that the outer lid or inner stopper is attached to the cap body by screwing. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2019-001538 [Patent Document 2] Japanese Patent Application Publication No. 2019-001539 Summary of the Invention [Problem to be solved by the invention]

[0005] In the above-mentioned capped container, the area between the outer lid and the inner plug is very difficult to clean when cleaning the cap unit. For this reason, the cap unit is designed to be separable into the outer lid and the inner plug to improve cleanability.

[0006] However, in conventional cap units, when the cap unit is designed to be separable into an outer lid and an inner plug, there is a problem in that the structure for attaching the inner plug to the outer lid (detachment mechanism) becomes complicated.

[0007] The present invention has been proposed in consideration of the above-mentioned conventional circumstances, and aims to provide a cap unit that simplifies the structure for attaching an inner stopper to an outer lid, thereby making it possible to improve the cleanability of the outer lid and inner stopper, and a capped container that, by being equipped with such a cap unit, allows for further improvement in usability. [Means for solving the problem]

[0008] 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, an outer lid surrounding the top of the container body; an inside plug fitted into the container body from an upper opening of the container body; a detachment mechanism for detachably attaching the inner plug to the outer lid, The cap unit is characterized in that the detachment mechanism has a structure in which the inner plug is attached to the outer lid by rotating the inner plug around its axis from a removal position in which the central axis of the outer lid is eccentric with respect to the central axis of the inner plug to an attachment position in which the central axes of the outer lid and the inner plug are aligned. [2] A cap unit that can be detachably attached to a container body having an open top, an outer lid surrounding the top of the container body; an inside plug fitted into the container body from an upper opening of the container body; a detachment mechanism for detachably attaching the inner plug to the outer lid, The cap unit is characterized in that the detachment mechanism has a structure in which the inner plug is attached to the outer lid by rotating the inner plug around its axis from a removal position where the central axis of the outer lid is eccentric with respect to the central axis of the inner plug, and then sliding the inner plug to an attachment position. [3] The cap unit described in [1] or [2], characterized in that in the removal position, the inner plug is inserted from above into the opening provided at the top of the outer lid, and the flange portion protruding in the radially expanding direction from the outer periphery of the upper end side of the inner plug is abutted against the periphery of the opening of the outer lid, thereby engaging the inner plug with the outer lid. [4] The detachment mechanism includes a guide engagement portion that guides the inside plug rotatably relative to the outer lid between the removal position and the attachment position by engaging a first engagement portion provided on the outer lid with a second engagement portion provided on the inside plug; The cap unit described in [3] is characterized in that it has a rotating locking portion in which, when the inner plug is rotated to the mounting position, either a first locking portion provided on the outer lid or a second locking portion provided on the inner plug locks with the other locking portion. [5] The detachment mechanism includes a guide engagement portion that guides the inside plug rotatably relative to the outer lid between the removal position and the attachment position by engaging a first engagement portion provided on the outer lid with a second engagement portion provided on the inside plug; The cap unit described in [3] is characterized in that it has a slide locking portion in which, when the inner plug is slid to the mounting position, either a first locking portion provided on the outer lid or a second locking portion provided on the inner plug locks with the other locking portion. [6] The cap unit according to [4] or [5], characterized in that a clicking sensation is given when the one locking portion is locked with the other locking portion. [7] The cap unit according to any one of [1] to [6], wherein the inner plug or the outer lid is attached to the container body by screwing. [8] A cap unit described in any one of [1] to [7], characterized in that it is provided with a waterproof gasket that is integrally attached to the outer periphery of the lower end side of the inside plug and seals the space between the container body and the inside plug. [9] The cap unit according to any one of [1] to [8] above; A capped container comprising: a container body to which the cap unit is attached. [Effects of the Invention]

[0009] As described above, according to the present invention, it is possible to provide a cap unit that simplifies the structure for attaching the inner stopper to the outer lid and improves the cleanability of the outer lid and inner stopper, as well as a capped container that, by being equipped with such a cap unit, allows for further improved usability. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a perspective view showing the appearance of a capped container equipped with a cap unit according to a first embodiment of the present invention. [Figure 2] 2 is a cross-sectional view showing the configuration of a capped container equipped with the cap unit shown in FIG. 1. FIG. [Figure 3] 3 is a perspective view showing a state in which an inside plug is in an attached position relative to an outer lid of the cap unit shown in FIG. 2. FIG. [Figure 4] 3 is a partially cutaway perspective view showing a state in which an inside plug is in an attached position relative to an outer lid of the cap unit shown in FIG. 2. FIG. [Figure 5] 3 is a bottom view showing a state in which the inside plug is in an attachment position relative to the outer lid of the cap unit shown in FIG. 2. FIG. [Figure 6] 2 is a cross-sectional view showing a state in which the inside plug is in a detached position relative to the outer lid of the cap unit shown in FIG. 1. FIG. [Figure 7] 7 is a perspective view showing a state in which the inside plug is in a detached position relative to the outer lid of the cap unit shown in FIG. 6. FIG. [Figure 8] 7 is a partially cutaway perspective view showing a state in which the inside plug is in a detached position relative to the outer lid of the cap unit shown in FIG. 6. FIG. [Figure 9] 7 is a bottom view showing the state in which the inside plug is in a detached position relative to the outer lid of the cap unit shown in FIG. 6. FIG. [Figure 10]1. FIG. 4 is a bottom view showing a state in which the inside plug is between a detached position and an attached position relative to the outer lid of the cap unit shown in FIG. [Figure 11] 2 is a perspective view of an outer lid provided in the cap unit shown in FIG. 1, seen from above. [Figure 12] 2 is a bottom view of an outer cover provided in the cap unit shown in FIG. 1. FIG. [Figure 13] 2 is a perspective view of one side of an inside plug included in the cap unit shown in FIG. 1, viewed from above. [Figure 14] 2 is a perspective view of one side of an inside plug provided in the cap unit shown in FIG. 1, viewed from below. [Figure 15] 2 is a perspective view of the other side of the inside plug included in the cap unit shown in FIG. 1, viewed from above. [Figure 16] 2 is a perspective view of the other side of the inside plug included in the cap unit shown in FIG. 1, viewed from below. [Figure 17] 2 is a top view of an inside plug provided in the cap unit shown in FIG. 1. FIG. [Figure 18] 2 is a bottom view of the inside plug provided in the cap unit shown in FIG. 1. FIG. [Figure 19] FIG. 10 is a perspective view showing the appearance of a capped container equipped with a cap unit according to a second embodiment of the present invention. [Figure 20] 20 is a perspective view showing a state in which the inside plug is in an attached position relative to the outer lid of the cap unit shown in FIG. 19. FIG. [Figure 21] 20 is a partially cutaway perspective cross-sectional view showing the state in which the inside plug is in the attached position relative to the outer lid of the cap unit shown in FIG. 19. FIG. [Figure 22] 20 is a bottom view showing the state in which the inside plug is in the attachment position relative to the outer lid of the cap unit shown in FIG. 19. [Figure 23] 20 is a horizontal cross-sectional view showing a state in which the inside plug is in an attached position relative to the outer lid of the cap unit shown in FIG. 19. [Figure 24] 20 is a perspective view of the essential parts, seen from below, of the guide engagement portion when the inside plug is in the attachment position relative to the outer lid of the cap unit shown in FIG. 19. FIG. [Figure 25]20 is a perspective view of the main part, seen from below, of the slide locking portion when the inside plug is in the attachment position relative to the outer lid of the cap unit shown in FIG. 19. FIG. [Figure 26] 20 is a perspective view showing a state in which the inside plug is in a detached position relative to the outer lid of the cap unit shown in FIG. 19. FIG. [Figure 27] 20 is a partially cutaway perspective cross-sectional view showing the state in which the inside plug is in a detached position relative to the outer lid of the cap unit shown in FIG. 19. FIG. [Figure 28] 20 is a bottom view showing the state in which the inside plug is in a detached position relative to the outer lid of the cap unit shown in FIG. 19. [Figure 29] 20 is a horizontal cross-sectional view showing a state in which the inside plug is in a detached position relative to the outer lid of the cap unit shown in FIG. 19. FIG. [Figure 30] 20 is a perspective view of the main part, seen from below, of the guide engagement portion when the inside plug is in the removal position relative to the outer lid of the cap unit shown in FIG. 19. FIG. [Figure 31] 20 is a perspective view of the main part, seen from below, of the slide locking portion when the inside plug is in the removal position relative to the outer lid of the cap unit shown in FIG. 19. FIG. [Figure 32] 20 is a perspective view showing a state in which the inside plug is in an intermediate position relative to the outer lid of the cap unit shown in FIG. 19. FIG. [Figure 33] 20 is a partially cutaway perspective cross-sectional view showing a state in which the inside plug is in an intermediate position relative to the outer lid of the cap unit shown in FIG. 19. FIG. [Figure 34] 20 is a bottom view showing a state in which the inside plug is in an intermediate position relative to the outer lid of the cap unit shown in FIG. 19. [Figure 35] 20 is a horizontal cross-sectional view showing a state in which the inside plug is in an intermediate position relative to the outer lid of the cap unit shown in FIG. 19. [Figure 36] 20 is a perspective view of the main part, seen from below, of the guide engagement portion when the inside plug is in an intermediate position relative to the outer lid of the cap unit shown in FIG. 19. FIG. [Figure 37] 20 is a perspective view of the main part, seen from below, of the slide locking portion when the inside plug is in an intermediate position relative to the outer lid of the cap unit shown in FIG. 19. FIG. [Figure 38] 20 is a perspective view of an outer lid provided in the cap unit shown in FIG. 19, seen from above. [Figure 39] 20 is a perspective view of one side of an outer lid provided in the cap unit shown in FIG. 19, viewed from below. [Figure 40] 20 is a perspective view of the other side of the outer lid provided in the cap unit shown in FIG. 19, viewed from below. FIG. [Figure 41] 20 is a perspective view of one side of an inside plug included in the cap unit shown in FIG. 19, viewed from below. [Figure 42] 20 is a perspective view of the other side of the inside plug included in the cap unit shown in FIG. 19, viewed from below. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. (First embodiment) First, as a first embodiment of the present invention, a capped container 100A equipped with a cap unit 1A shown in, for example, FIGS. 1 to 18 will be described.

[0012] FIG. 1 is a perspective view showing the appearance of a capped container 100A equipped with a cap unit 1A. FIG. 2 is a cross-sectional view showing the configuration of a capped container 100A equipped with a cap unit 1A. FIG. 3 is a perspective view showing a state in which an inside stopper 10 is in an attached position relative to an outer lid 9 of the cap unit 1A. FIG. 4 is a cross-sectional perspective view, partially cut away, showing a state in which an inside stopper 10 is in an attached position relative to an outer lid 9 of the cap unit 1A. FIG. 5 is a bottom view showing a state in which an inside stopper 10 is in an attached position relative to an outer lid 9 of the cap unit 1A. FIG. 6 is a cross-sectional view showing a state in which an inside stopper 10 is in a removed position relative to an outer lid 9 of the cap unit 1A. FIG. 7 is a perspective view showing a state in which an inside stopper 10 is in a removed position relative to an outer lid 9 of the cap unit 1A. FIG. 8 is a cross-sectional perspective view, partially cut away, showing a state in which an inside stopper 10 is in a removed position relative to an outer lid 9 of the cap unit 1A. FIG. 9 is a bottom view showing a state in which an inside stopper 10 is in a removed position relative to an outer lid 9 of the cap unit 1A. FIG. 10 is a bottom view showing a state in which the inside stopper 10 is located between the removal position and the attachment position relative to the outer lid 9 of the cap unit 1A. FIG. 11 is a perspective view of the outer lid 9 included in the cap unit 1A, seen from above. FIG. 12 is a bottom view of the outer lid 9 included in the cap unit 1A. FIG. 13 is a perspective view of one side of the inside stopper 10 included in the cap unit 1A, seen from above. FIG. 14 is a perspective view of one side of the inside stopper 10 included in the cap unit 1A, seen from below. FIG. 15 is a perspective view of the other side of the inside stopper 10 included in the cap unit 1A, seen from above. FIG. 16 is a perspective view of the other side of the inside stopper 10 included in the cap unit 1A, seen from below. FIG. 17 is a top view of the inside stopper 10 included in the cap unit 1A. FIG. 18 is a bottom view of the inside stopper 10 included in the cap unit 1A.

[0013] As shown in Figures 1 and 2, the capped container 100A of this embodiment is a beverage container that comprises a container body 2 with an open top and a cap unit 1A that can be attached and detached to the container body 2, and is capable of keeping the beverage (contents) contained in the container body 2 hot or cold.

[0014] Specifically, the container body 2 has an outer container 3 and an inner container 4 made of metal, such as stainless steel. The container body 2 has a vacuum insulation structure in which the outer container 3 and the inner container 4, each having an open end, are joined together near their open ends in a state in which the inner container 4, also having an open end, is housed inside the outer container 3, which also has an open end, and a vacuum insulation layer 5 is provided between the outer container 3 and the inner container 4.

[0015] The vacuum insulation layer 5 can be formed, for example, by sealing an air vent hole provided in the center of the bottom surface of the outer container 3 with brazing material in a chamber that has been depressurized (evacuated) to a high vacuum.

[0016] The container body 2 has such a vacuum insulation structure, which allows it to have the above-mentioned functions of keeping things warm or cold. Furthermore, the container body 2 has such a vacuum insulation structure, which causes tension to be constantly applied to the outer container 3 and the inner container 4 due to the difference between the internal pressure (vacuum pressure) and the external pressure (atmospheric pressure), thereby increasing the mechanical strength of the outer container 3 and the inner container 4. This makes it possible to increase the rigidity of the container body 2 even when the plate thicknesses of the outer container 3 and the inner container 4 are reduced, and thus makes it possible to reduce the weight of the container body 2.

[0017] The container body 2 has a substantially circular bottom surface 2b, a body 2c that stands in a substantially cylindrical shape from the outer periphery of the bottom surface 2b, and a mouth / neck portion 2d that stands in a substantially cylindrical shape from the upper side of the body 2c. The upper end of the mouth / neck portion 2d opens in a circular shape as the upper opening 2a of the container body 2.

[0018] The inner circumferential surface of the mouth / neck portion 2d is provided with a female thread portion 6. Furthermore, below the female thread portion 6, a ring-shaped protruding portion 7 is provided so as to protrude from the inner circumferential surface of the inner container 4 around the entire circumference.

[0019] Although the capped container 100A of this embodiment has a generally cylindrical external shape overall, the external shape of the capped container 100A 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 (outer container 3) may be painted, printed, or the like.

[0020] The cap unit 1A of this embodiment constitutes a lid that opens and closes the upper opening 2a of the container body 2. Specifically, as shown in Figures 2 to 18, this cap unit 1A has a cap body 8 that closes the upper opening 2a of the container body 2 when fitted into the inside of the container body 2 from the upper opening 2a of the container body 2, and has a structure in which this cap body 8 is attached to the container body 2 by screwing.

[0021] The cap body 8 has an outer lid 9 that covers the upper opening 2a of the container body 2, an inner stopper 10 that is fitted into the inside of the container body 2 from the upper opening 2a, and a detachment mechanism 11A that attaches the inner stopper 10 to the outer lid 9 in a freely detachable manner.

[0022] As shown in Figures 2, 11 and 12, the outer lid 9 is made of, for example, a heat-resistant resin, and has a peripheral wall portion 9a formed in an approximately cylindrical shape so that its appearance is continuous with the trunk portion 2c of the container body 2, an upper wall portion 9b that closes the upper outer periphery of the peripheral wall portion 9a, and an opening 9c that opens the upper wall portion 9b in an approximately circular shape.

[0023] As shown in Figures 2 and 13 to 18, the inside plug 10 is made of, for example, a heat-resistant resin, and has a substantially circular bottom wall portion 10a, a peripheral wall portion 10b that rises from the periphery of the bottom wall portion 10a in a substantially cylindrical shape, a top wall portion 10c that closes the upper part of the peripheral wall portion 10b, and a flange portion 10d where the top wall portion 10c protrudes in the radial direction beyond the peripheral wall portion 10b.

[0024] The inside plug 10 has a substantially cylindrical lower plug member 12 with a bottom that forms the bottom wall portion 10a and the peripheral wall portion 10b, and a substantially circular upper plug member 13 that forms the top wall portion 10c and the flange portion 10d, and the lower plug member 12 is attached integrally to the underside of the upper plug member 13 by welding or the like. Note that the inside of the inside plug 10 is not limited to air as an insulating layer, and a thermal insulating material S may also be arranged.

[0025] Additionally, a male thread portion 14 is provided on the outer peripheral surface of the peripheral wall portion 10b (inner plug 10). In the capped container 100A, the cap body 8 (cap unit 1A) is detachably attached to the container body 2 by threading the male thread portion 14 into the female thread portion 6. Furthermore, the female thread portion 6 and the male thread portion 14 are double-threaded threads that are complementary to each other. When a double-threaded thread is used, the cap body 8 (cap unit 1A) can be attached to and detached from the container body 2 with a small rotational operation (approximately 180° in this embodiment).

[0026] A waterproof gasket 15 is attached integrally to the outer periphery of the lower end of the inside plug 10. The waterproof gasket 15 is a ring-shaped sealing member that seals the gap between the protruding portion 7 of the container body 2 and the inside plug 10, and is made of an elastic material such as a heat-resistant rubber such as silicone rubber or an elastomer. The waterproof gasket 15 is formed integrally with the inside plug 10 (cap body 8) by insert molding, which will be described later.

[0027] The inside plug 10 has a first recess 10e shaped to correspond to the first protrusion 15a that protrudes inward from the upper end of the inner periphery of the water stop gasket 15, and a second recess 10f shaped to correspond to the second protrusion 15b that protrudes upward from the lower end of the inner periphery of the water stop gasket 15. The inside plug 10 also has a third protrusion 10g shaped to correspond to the third recess 15c of the water stop gasket 15 that is formed between the first recess 10e and the second recess 10f of the inside plug 10 and is located between the first protrusion 15a and the second protrusion 15b of the water stop gasket 15.

[0028] In cap unit 1A of this embodiment, first convex portion 15a protruding inward of watertight gasket 15 is formed integrally with first concave portion 10e of inside plug 10, and second convex portion 15b protruding upward of watertight gasket 15 is formed integrally with second concave portion 10f of inside plug 10. Furthermore, by integrally molding third concave portion 15c of watertight gasket 15 and third convex portion 10g of inside plug 10, the anchor effect of each can increase the adhesive strength of watertight gasket 15 attached integrally to inside plug 10 (cap body 8).

[0029] Furthermore, although the underside of the inside plug 10 has a shape in which the bottom wall portion 10a is recessed upward, it is flush with the underside of the water stop gasket 15. This makes it difficult for the water stop gasket 15 to peel off from the inside plug 10 at the boundary between the underside of the inside plug 10 and the underside of the water stop gasket 15. Furthermore, because there are no gaps near the boundary, water droplets do not easily accumulate, making it hygienic.

[0030] Additionally, two elastic flange portions 15d are provided on the outer peripheral surface of the watertight gasket 15, protruding in the radially expanding direction. When the cap body 8 (cap unit 1A) is attached to the container body 2, the elastic flange portions 15d of the watertight gasket 15 elastically deform and come into close contact with the protruding portion 7 of the container body 2 over the entire circumference. This makes it possible to seal (watertightly seal) the gap between the protruding portion 7 (container body 2) and the inside plug 10 (cap body 8).

[0031] It should be noted that the waterproof gasket 15 is not necessarily limited to the shape described above, and for example, the number of elastic flange portions 15d is not limited to the two described above, but can be one or more.

[0032] Furthermore, the waterproof gasket 15 is not necessarily limited to the configuration provided with the elastic flange portion 15d described above, and its shape, etc., can be appropriately modified. For example, the waterproof gasket 15 may be configured to have an elastic flange portion that protrudes downward while curving from the upper end of the outer circumferential surface thereof.

[0033] As shown in Figures 2 to 18, the detachment mechanism 11A has a structure in which the inner plug 10 is attached to the outer lid 9 by rotating the inner plug 10 around its axis from a removal position where the central axis AX of the outer lid 9 is eccentric with respect to the central axis BX of the inner plug 10 to an attachment position where the central axis AX of the outer lid 9 and the central axis BX of the inner plug 10 are aligned.

[0034] A mark 10h indicating the removal position and the attachment position is provided on the top wall 10c of the inside plug 10. Meanwhile, a mark 9d indicating the removal position and a mark 9e indicating the attachment position are provided on the peripheral wall 9a of the outer lid 9. As a result, in the cap body 8, when the inside plug 10 is in the removal position relative to the outer lid 9, the marks 9d and 10h are aligned, and when the inside plug 10 is in the attachment position relative to the outer lid 9, the marks 9e and 10h are aligned.

[0035] Specifically, this detachment mechanism 11A includes a guide engagement portion 18 that guides the inner plug 10 rotatably between a removal position and an attachment position relative to the outer lid 9 by engaging a first engagement portion 16 provided on the outer lid 9 with a second engagement portion 17 provided on the inner plug 10, and a rotational engagement portion 21 that engages either a first engagement portion 19 provided on the outer lid 9 or a second engagement portion 20 provided on the inner plug 10 with the other engagement portion (in this embodiment, the first engagement portion 19) when the inner plug 10 is rotated to the attachment position (in this embodiment, the second engagement portion 20).

[0036] As shown in Figures 11 and 12, the first engagement portion 16 has a pair of cutout recesses 16a, 16b formed by cutting out a portion of the upper wall portion 9b of the outer lid 9, and a pair of guide walls 16c, 16d protruding inward from between the pair of cutout recesses 16a, 16b.

[0037] The pair of notched recesses 16a, 16b are provided at positions facing each other across the opening 9c of the outer lid 9, and are formed by cutting out arc-shaped portions at positions eccentric from the central axis AX of the outer lid 9.

[0038] The pair of guide walls 16c, 16d are part of the upper wall portion 9b located between the pair of cutout recesses 16a, 16b, and are provided at positions facing each other across the opening 9c of the outer lid 9. In addition, one guide wall 16c of the pair of guide walls 16c, 16d protrudes radially inward from the outer lid 9 by a greater amount than the other guide wall 16d, in accordance with the oval shape obtained by adding together a circle centered on the central axis BX of the inside plug 10 in the attached position and a circle centered on the central axis BX of the inside plug 10 in the removed position.

[0039] The pair of guide walls 16c, 16d are formed by cutting out a portion of the lower surface of the upper wall portion 9b in the circumferential direction. A pair of stoppers 16e, 16f are provided at the circumferential ends of the pair of guide walls 16c, 16d. Meanwhile, stoppers 16g, 16h are provided on the circumferential opposite sides of the cutout recesses 16a, 16b of the guide walls 16c, 16d.

[0040] On the other hand, as shown in Figures 13 to 18, the second engagement portion 17 has a pair of rib walls 17a, 17b protruding outward from the peripheral wall portion 10b of the inside plug 10, and a pair of guide grooves 17c, 17d formed between the flange portion 10d of the inside plug 10 and the pair of rib walls 17a, 17b.

[0041] The pair of rib walls 17a, 17b are provided at opposing positions on the peripheral wall portion 10b of the inside plug 10. In addition, in accordance with the shapes of the pair of cutout recesses 16a, 16b, one of the pair of rib walls 17a, 17b protrudes radially outward from the inside plug 10 by a greater amount than the other rib wall 17b.

[0042] As a result, of the pair of guide grooves 17c, 17d, one guide groove 17c is formed between the flange portion 10d of the center plug 10 and one rib wall 17a, and the other guide groove 17d is formed between the flange portion 10d of the center plug 10 and the other rib wall 17b.

[0043] 6 to 9, the guide engagement portion 18 aligns one notched recess 16a with one rib wall 17a and the other notched recess 16b with the other rib wall 17b, and inserts the inside plug 10 from above into the opening 9c of the outer lid 9. This causes the flange portion 10d of the inside plug 10 to abut against the upper wall portion 9b around the opening 9c of the outer lid 9, and the inside plug 10 is engaged with the outer lid 9. In addition, in the detached position shown in FIGS. 6 to 9, the central axis AX of the outer lid 9 is eccentric with respect to the central axis BX of the inside plug 10.

[0044] In the guide engagement portion 18, from this state, by rotating the inside plug 10 relative to the outer lid 9 toward one side about an arc axis that cuts out the pair of notched recesses 16a, 16b and is located eccentrically from the central axis AX of the outer lid 9, one guide wall 16c is engaged with one guide groove 17c, and the other guide wall 16d is engaged with the other guide groove 17d. At this time, the direction in which the inside plug 10 is rotated about its axis relative to the outer lid 9 coincides with the direction in which the cap body 8 is attached to the container body 2 (the capping direction).

[0045] 10, first engaging portion 16 and second engaging portion 17 are engaged with each other. In this state, guide engaging portion 18 can guide inside plug 10 rotatably relative to outer lid 9 between the removal position and the attachment position.

[0046] As shown in Figures 4 and 12, the first engagement portion 19 is located on the underside of the upper wall portion 9b and is composed of a pair of protrusions that protrude inward from the circumferential midpoint of the pair of guide walls 16c, 16d.

[0047] On the other hand, as shown in Figures 13 to 16 and 18, the second engagement portion 20 is located in the circumferential midpoint of the pair of rib walls 17a, 17b and is composed of a pair of recesses that cut out part of the tips of the rib walls 17a, 17b.

[0048] In the rotating locking portion 21, when the inner plug 10 is rotated relative to the outer lid 9 to the mounting position shown in Figures 2 to 5, the pair of first locking portions 19 are locked to the pair of second locking portions 20.

[0049] That is, in this detachment mechanism 11A, when the inside plug 10 is rotated to the attachment position relative to the outer lid 9, the pair of rib walls 17a, 17b of the inside plug 10 are elastically deformed, and the pair of first locking portions 19 move over the pair of second locking portions 20, and then are locked by the pair of second locking portions 20. This brings the outer lid 9 and the inside plug 10 into an integrated state.

[0050] Furthermore, the rotating locking portion 21 is capable of providing a clicking sensation when either the first locking portion 19 or the second locking portion 20 (in this embodiment, the second locking portion 20) is locked to the other locking portion (in this embodiment, the first locking portion 19).

[0051] 2 to 5, the central axis AX of the outer lid 9 coincides with the central axis BX of the inside plug 10. Furthermore, the peripheral wall portion 9a of the outer lid 9 and the flange portion 10d of the inside plug are substantially flush with each other as the outer peripheral surface of the cap body 8.

[0052] In the detachment mechanism 11A having the above-described configuration, in the detachment position shown in Figures 6 to 9, one notch recess 16a is aligned with one rib wall 17a and the other notch recess 16b is aligned with the other rib wall 17b, and the inner plug 10 is inserted from above into the opening 9c of the outer lid 9, and the flange portion 10d of the inner plug 10 is abutted against the upper wall portion 9b around the opening 9c of the outer lid 9, thereby engaging the inner plug 10 with the outer lid 9.

[0053] From this state, as shown in Figure 10, by rotating the inner plug 10 relative to the outer lid 9 toward one side around the axis of the arc that is eccentric from the central axis AX of the outer lid 9 and cuts out the pair of notched recesses 16a, 16b described above, one guide wall 16c is engaged with one guide groove 17c and the other guide wall 16d is engaged with the other guide groove 17d, and the inner plug 10 is rotated relative to the outer lid 9 from the removal position to the attachment position.

[0054] 2 to 5 relative to the outer lid 9, the pair of first locking portions 19 are locked with the pair of second locking portions 20. Furthermore, one circumferential end of the pair of rib walls 17a, 17b abuts against stoppers 16e, 16f, thereby preventing the inside plug 10 from rotating relative to the outer lid 9. This makes it possible to attach the inside plug 10 to the outer lid 9.

[0055] In the detachment mechanism 11A, one side of the inside stopper 10 about the axis relative to the outer lid 9 (attachment direction) coincides with the direction in which the cap body 8 is attached to the container body 2 (cap closing direction). Therefore, when the outer lid 9 is gripped and rotated about the axis in the direction in which the cap body 8 (cap unit 1A) is attached, one circumferential end of the pair of rib walls 17a, 17b abuts against the stoppers 16e, 16f, preventing the inside stopper 10 from rotating about the axis relative to the outer lid 9, and the outer lid 9 and the inside stopper 10 rotate integrally. In this case, the cap body 8 can be attached to the container body 2 by rotating the inside stopper 10.

[0056] In the guide engagement portion 18, from this state, by rotating the inside plug 10 relative to the outer lid 9 toward one side (the installation direction) around an arc axis that is eccentric from the central axis AX of the outer lid 9 and cuts out the pair of notched recesses 16a, 16b, one guide wall 16c is engaged with one guide groove 17c, and the other guide wall 16d is engaged with the other guide groove 17d. At this time, the direction in which the inside plug 10 is rotated around its axis relative to the outer lid 9 coincides with the direction in which the cap body 8 is attached to the container body 2 (the capping direction).

[0057] In addition, in the detachment mechanism 11A, the cap body 8 (cap unit 1A) is attached to the container body 2 by threading the male thread portion 14 of the inside plug 10 into the female thread portion 6 of the container body 2, so that the flange portion 10d of the inside plug 10 presses the upper wall portion 9b of the outer lid 9 from above. This prevents the outer lid 9 from rattling in the vertical direction, making it possible to securely close the container body 2.

[0058] On the other hand, in the detachment mechanism 11A, the operation is reversed from that described above, i.e., by rotating the inner plug 10 relative to the outer lid 9 in the opposite direction to that described above, the engagement state of the first engagement portion 19 relative to the second engagement portion 20 is released, as shown in Figure 10, and the inner plug 10 is rotated from the attachment position to the removal position relative to the outer lid 9.

[0059] In addition, when the inner plug 10 is rotated relative to the outer lid 9 to the removal position shown in Figures 6 to 9, the other circumferential ends of the pair of rib walls 17a, 17b abut against stoppers 16g, 16h, thereby preventing rotation of the inner plug 10 relative to the outer lid 9.

[0060] At this time, one notched recess 16a and one rib wall 17a are aligned, and the other notched recess 16b and the other rib wall 17b are aligned, so that the inside plug 10 can be pulled upward from the opening 9c of the outer lid 9. This makes it possible to remove the inside plug 10 from the outer lid 9.

[0061] Here, the inside stopper 10 can only be removed from the outer lid 9 when the cap body 8 is removed from the container body 2. In other words, when the cap body 8 is attached to the container body 2, it is impossible to pull the inside stopper 10 upward or pull the outer lid 9 downward. Therefore, when the cap body 8 is attached to the container body 2, the inside stopper 10 will not be accidentally removed from the outer lid 9.

[0062] When removing the cap body 8 (cap unit 1A) from the container body 2, the procedure is the same as when it was attached, except that the rotation direction is reversed. That is, when the outer lid 9 of the cap body 8 is grasped and rotated relative to the container body 2 in the opposite direction to that used when attaching the cap body 8, one circumferential end of the pair of rib walls 17a, 17b comes into contact with the stoppers 16e, 16f, causing the inside plug 10 to rotate integrally with the outer lid 9. This allows the cap body 8 to be removed from the container body 2.

[0063] In the detachment mechanism 11A, when the cap body 8 (cap unit 1A) is attached, the central axis AX of the outer lid 9 and the central axis BX of the inside plug 10 coincide. This also coincides with the central axis of the container body 2. In contrast, the rotation axis of the inside plug 10 when attaching or detaching to or from the outer lid 9 is an arc axis that cuts out the pair of notched recesses 16a, 16b and is eccentric from the central axis AX of the outer lid 9 and the central axis BX of the inside plug 10 when they are attached or detached to or from the outer lid 9. In other words, the rotation axis when attaching the cap body 8 (cap unit 1A) to the container body 2 and the rotation axis when attaching or detaching the inside plug 10 to or from the outer lid 9 are eccentric.

[0064] Here, we will explain the rotational movement caused by the threaded engagement of the male thread portion 14 of the inside plug 10 with the female thread portion 6 of the container body 2 when attaching or detaching the cap body 8 (cap unit 1A) to or from the container body 2. When the outer lid 9 of the cap body 8 is grasped and rotated relative to the container body 2, the cap body 8 rotates around the central axis AX of the outer lid 9 and the central axis BX of the inside plug 10 at the attachment position, and the cap body 8 is attached to the container body 2. In this case, the rotational axis when attaching or detaching the inside plug 10 to the outer lid 9 described above is eccentric to the rotational axis when attached to or detached from the container body 2.

[0065] Normally, when three or more parts are attached or detached by screwing together, if the rotation axes are the same, there is a concern that when only one part is attached or detached, the other parts will be attached or detached at the same time, which is called co-rotation. In contrast, in this embodiment, the two rotation axes described above are eccentric, so it is possible to prevent co-rotation, such as the outer lid 9 being unintentionally attached or detached to or from the inner stopper 10 during the attachment or detachment operation of the cap body 8 to the container body 2.

[0066] In the cap unit 1A of this embodiment, the inner stopper 10 is detachably attached to the outer lid 9, so that the outer lid 9 and the inner stopper 10 can be washed separately, and the space between the outer lid 9 and the inner stopper 10 can be kept hygienic.

[0067] Therefore, the capped container 100A equipped with such a cap unit 1A can be made even easier to use.

[0068] (Second embodiment) Next, as a second embodiment of the present invention, a capped container 100B including a cap unit 1B shown in, for example, FIGS. 19 to 42 will be described.

[0069] FIG. 19 is a perspective view showing the appearance of a capped container 100B equipped with a cap unit 1B. FIG. 20 is a perspective view showing the inside stopper 10 in the attached position relative to the outer lid 9 of the cap unit 1B. FIG. 21 is a partially cutaway perspective view showing the inside stopper 10 in the attached position relative to the outer lid 9 of the cap unit 1B. FIG. 22 is a bottom view showing the inside stopper 10 in the attached position relative to the outer lid 9 of the cap unit 1B. FIG. 23 is a horizontal sectional view showing the inside stopper 10 in the attached position relative to the outer lid 9 of the cap unit 1B. FIG. 24 is a perspective view of a main part of the guide engagement portion 24, viewed from below, when the inside stopper 10 is in the attached position relative to the outer lid 9 of the cap unit 1B. FIG. 25 is a perspective view of a main part of the slide locking portion 27, viewed from below, when the inside stopper 10 is in the attached position relative to the outer lid 9 of the cap unit 1B. FIG. 26 is a perspective view showing the inside stopper 10 in the removed position relative to the outer lid 9 of the cap unit 1B. FIG. 27 is a partially cutaway perspective view showing the inside plug 10 in the removal position relative to the outer lid 9 of the cap unit 1B. FIG. 28 is a bottom view showing the inside plug 10 in the removal position relative to the outer lid 9 of the cap unit 1B. FIG. 29 is a horizontal cross-sectional view showing the inside plug 10 in the removal position relative to the outer lid 9 of the cap unit 1B. FIG. 30 is a perspective view of the guide engagement portion 24 from below when the inside plug 10 is in the removal position relative to the outer lid 9 of the cap unit 1B. FIG. 31 is a perspective view of the slide locking portion 27 from below when the inside plug 10 is in the removal position relative to the outer lid 9 of the cap unit 1B. FIG. 32 is a perspective view showing the inside plug 10 in an intermediate position relative to the outer lid 9 of the cap unit 1B. FIG. 33 is a partially cutaway perspective view showing the inside plug 10 in the intermediate position relative to the outer lid 9 of the cap unit 1B. Fig. 34 is a bottom view showing a state in which the inside plug 10 is in an intermediate position relative to the outer lid 9 of the cap unit 1B. Fig. 35 is a horizontal cross-sectional view showing a state in which the inside plug 10 is in an intermediate position relative to the outer lid 9 of the cap unit 1B. Fig. 36 is a perspective view of a main part, seen from below, of the state of the guide engagement portion 24 in a state in which the inside plug 10 is in an intermediate position relative to the outer lid 9 of the cap unit 1B.FIG. 37 is a perspective view of the main part of the slide locking portion 27, seen from below, when the inside plug 10 is in an intermediate position relative to the outside plug 9 of the cap unit 1B. FIG. 38 is a perspective view of the outside plug 9 of the cap unit 1B, seen from above. FIG. 39 is a perspective view of one side of the outside plug 9 of the cap unit 1B, seen from below. FIG. 40 is a perspective view of the other side of the outside plug 9 of the cap unit 1B, seen from below. FIG. 41 is a perspective view of one side of the inside plug 10 of the cap unit 1B, seen from below. FIG. 42 is a perspective view of the other side of the inside plug 10 of the cap unit 1B, seen from below. In the following description, parts equivalent to those of the cap unit 1A will not be described and will be denoted by the same reference numerals in the drawings.

[0070] As shown in FIG. 19, the cap unit 1B of this embodiment is detachably attached to the container body 2 to form a capped container 100B.

[0071] Specifically, this cap unit 1B has basically the same configuration as the above-mentioned cap unit 1A, except that instead of the above-mentioned detachment mechanism 11A, it is equipped with a detachment mechanism 11B that detachably attaches the inner stopper 10 to the outer lid 9, as shown in Figures 19 to 42.

[0072] The detachment mechanism 11B has a structure in which the inner plug 10 is attached to the outer lid 9 by rotating the inner plug 10 from a removal position where the central axis AX of the outer lid 9 is eccentric with respect to the central axis BX of the inner plug 10 around its axis and then sliding the inner plug 10 to an attachment position where the central axis AX of the outer lid 9 and the central axis BX of the inner plug 10 coincide with each other.

[0073] Specifically, as shown in Figures 20 to 42, this detachment mechanism 11B includes a guide engagement portion 24 that guides the inner plug 10 rotatably between a removal position and an attachment position relative to the outer lid 9 by engaging a first engagement portion 22 provided on the outer lid 9 with a second engagement portion 23 provided on the inner plug 10, and a slide engagement portion 27 that engages either a first engagement portion 25 provided on the outer lid 9 or a second engagement portion 26 provided on the inner plug 10 with the other engagement portion (in this embodiment, the first engagement portion 25) with the second engagement portion 26 (in this embodiment, the second engagement portion 26) when the inner plug 10 is slid to the attachment position.

[0074] As shown in Figures 38 to 40, the first engagement portion 22 has three cutout recesses 22a, 22b, and 22c formed by cutting out a portion of the upper wall portion 9b of the outer lid 9, and three guide walls 22d, 22e, and 22f protruding inward from between the three cutout recesses 22a, 22b, and 22c.

[0075] The three notched recesses 22a, 22b, and 22c are arranged side by side around the opening 9c of the outer lid 9. Of these, the notched recess 22a is provided at a position shifted to one side in the circumferential direction from the mark protrusion 28 protruding from the upper surface of the upper wall portion 9b. On the other hand, the notched recesses 22b and 22c are located on both sides of the notched recess 22a in the circumferential direction and are provided to face each other across the opening 9c.

[0076] Marking protrusion 28 is located on the side opposite to the side where opening 9c of upper wall 9b is eccentric, and is provided so as to protrude upward while continuing with peripheral wall 9a to a height approximately equal to the thickness of flange 10d of inside plug 10. In this embodiment, marking protrusion 28 has a substantially semicircular shape in a plan view, but is not necessarily limited to such a shape and may have any shape that serves as a mark.

[0077] The three guide walls 22d, 22e, and 22f are part of the upper wall portion 9b located between the three cutout recesses 22a, 22b, and 22c, and are arranged side by side around the opening 9c of the outer lid 9. Of these, guide wall 22d is located between cutout recesses 22a and 22c, guide wall 22e is located between cutout recesses 22a and 22b, and guide wall 22f is located between cutout recesses 22b and 22c.

[0078] The three guide walls 22d, 22e, and 22f are formed by cutting out portions of the lower surface of the upper wall portion 9b in the circumferential direction. Of these, a stopper 22g is provided on one circumferential side (mounting direction) of guide wall 22f. Furthermore, a stopper 22h is provided on the opposite side of guide wall 22d across cutout recess 22a.

[0079] On the other hand, as shown in Figures 41 and 42, the second engagement portion 23 has three rib walls 23a, 23b, and 23c protruding outward from the peripheral wall portion 10b of the center plug 10, and three guide grooves 23d, 23e, and 23f formed between the flange portion 10d of the center plug 10 and the three rib walls 23a, 23b, and 23c.

[0080] The three rib walls 23a, 23b, and 23c are arranged side by side around the periphery of the peripheral wall portion 10b. Of these, the rib wall 23a is provided at a position coinciding with a mark recess 29 that cuts out a part of the flange portion 10d. On the other hand, the rib walls 23b and 23c are located on both sides of the rib wall 23a in the circumferential direction and are provided so as to face each other across the peripheral wall portion 10b.

[0081] As a result, of the three guide grooves 23d, 23e, and 23f, guide groove 23d is formed between the flange portion 10d of the center plug 10 and the rib wall 23a, guide groove 23e is formed between the flange portion 10d of the center plug 10 and the rib wall 23b, and guide groove 23f is formed between the flange portion 10d of the center plug 10 and the rib wall 23c.

[0082] The mark recess 29 has a shape cut out in a substantially semicircular shape in plan view, in accordance with the shape of the mark protrusion 28 described above.

[0083] 26 to 31, the guide engagement portion 24 is inserted into the opening 9c of the outer lid 9 from above while aligning the notched recess 22a with the rib wall 23a and aligning the notched recesses 22b, 22c with the rib walls 23b, 23c. This brings the inner plug 10 into engagement with the outer lid 9 while abutting the flange portion 10d of the inner plug 10 against the upper wall portion 9b around the opening 9c of the outer lid 9. In addition, in the removal position shown in FIGS. 26 to 31, the central axis AX of the outer lid 9 is eccentric with respect to the central axis BX of the inner plug 10.

[0084] Furthermore, in the guide engagement portion 24, a protrusion 30 matching the shape of the above-mentioned mark protrusion 28 is provided in the notched recess 22a to facilitate alignment of the inside plug 10 with the outer lid 9. This makes it possible to easily insert the inside plug 10 from above into the opening 9c of the outer lid 9 by aligning the protrusion 30 on the outer lid 9 side with the mark recess 29 on the inside plug 10 side.

[0085] At guide engagement portion 24, from this state, by rotating inside plug 10 toward one side about the axis relative to outer lid 9, guide wall 22d is engaged with guide groove 23d, guide wall 22e is engaged with guide groove 23e, and guide wall 22f is engaged with guide groove 23f. At this time, the direction in which inside plug 10 is rotated about the axis relative to outer lid 9 coincides with the direction in which cap body 8 is attached to container body 2 (the capping direction).

[0086] This causes the first engaging portion 22 and the second engaging portion 23 to engage with each other. In this state, the guide engaging portion 24 can guide the inside plug 10 rotatably relative to the outer lid 9 between the removal position and the intermediate position.

[0087] 32 to 37, the rib wall 23c of the guide engagement portion 24 abuts against the stopper 22g, thereby preventing the inside plug 10 from rotating beyond the intermediate position to one side (the mounting direction) relative to the outer lid 9 and from sliding to the other side (the removal direction) relative to the outer lid 9. Meanwhile, the rib wall 23a of the guide engagement portion 24 abuts against the stopper 22h, thereby preventing the inside plug 10 from rotating beyond the removal position to the other side (the removal direction) relative to the outer lid 9. This makes it possible to reliably position the inside plug 10 at the intermediate position and the removal position relative to the outer lid 9 when the inside plug 10 is rotated relative to the outer lid 9.

[0088] 32 to 37, the central axis AX of the outer lid 9 is eccentric with respect to the central axis BX of the inside plug 10. In addition, in the intermediate position shown in Figures 32 to 37, the mark protrusion 28 on the outer lid 9 side and the mark recess 29 on the inside plug 10 side face each other.

[0089] 38 to 40, the first locking portion 25 has a pair of locking protrusions 25a, 25b. The pair of locking protrusions 25a, 25b are located on guide walls 22e, 22f on both sides in the circumferential direction across the mark protrusion 28 of the upper wall portion 9b, and are provided to protrude inward from these guide walls 22e, 22f.

[0090] 41 and 42, the second locking portion 26 has a pair of locking recesses 26a, 26b. The pair of locking recesses 26a, 26b correspond to the pair of locking protrusions 25a, 25b and are located inside the guide grooves 23e, 23f, and are provided by recessing part of the peripheral wall portion 10b inward.

[0091] As shown in Figures 38 to 42, the slide locking portion 27 has a slide groove 31a and a pair of slide protrusions 31b provided in the guide wall 22d, a rib wall 23a, and a slide rib 31c provided on the rib wall 23a.

[0092] The slide groove 31a is a vertical groove cut out in the radial direction at a position that coincides with the mark protrusion 28 of the guide wall 22d. The pair of slide protrusions 31b protrude from the lower surface of the guide wall 22d in correspondence with the rib wall 23a, and are provided convexly downward in the radial direction from both sides of the slide groove 31a. The slide rib 31c is a vertical rib that connects the flange portion 10d and the rib wall 23a in correspondence with the slide groove 31a, and is provided in the radial direction from a position that coincides with the mark recess 29.

[0093] In the slide locking portion 27, the inner plug 10 is pushed into the outer lid 9 from the intermediate position shown in Figures 32 to 37 to slide to the mounting position, and the slide rib 31c is locked in the slide groove 31a, and the rib wall 23a is locked between the pair of slide protrusions 31b.

[0094] 20 to 25, the pair of locking projections 25a, 25b are locked to the pair of locking recesses 26a, 26b of the slide locking portion 27. This allows the first locking portion 25 to be locked to the second locking portion 26.

[0095] In addition, the slide locking portion 27 is capable of providing a clicking sensation when either the first locking portion 25 or the second locking portion 26 (in this embodiment, the second locking portion 26) is locked with the other locking portion (in this embodiment, the first locking portion 25).

[0096] 20 to 25, the central axis AX of the outer lid 9 and the central axis BX of the inside plug 10 are aligned. In addition, the peripheral wall 9a of the outer lid 9 and the flange 10d of the inside plug are substantially flush with each other as the outer peripheral surface of the cap body 8. Furthermore, the alignment of the marking protrusion 28 and the marking recess 29 makes it possible to visually confirm that the cap is in the aligned position.

[0097] In the detachment mechanism 11B having the above-described configuration, in the detachment position shown in Figures 26 to 31, the inner plug 10 is inserted from above into the opening 9c of the outer lid 9 while aligning the notched recess 22a with the rib wall 23a and aligning the notched recesses 22b, 22c with the rib walls 23b, 23c, and the flange portion 10d of the inner plug 10 is abutted against the upper wall portion 9b around the opening 9c of the outer lid 9, thereby engaging the inner plug 10 with the outer lid 9.

[0098] From this state, by rotating the inner plug 10 toward one side around the axis relative to the outer lid 9, the guide wall 22d engages with the guide groove 23d, the guide wall 22e engages with the guide groove 23e, and the guide wall 22f engages with the guide groove 23f, and the inner plug 10 is rotated from the removal position to the intermediate position relative to the outer lid 9.

[0099] Furthermore, when the inner plug 10 is rotated relative to the outer lid 9 from the removal position to the intermediate position shown in Figures 32 to 37, the rib wall 23c abuts against the stopper 22g, thereby preventing the inner plug 10 from rotating to one side (the installation direction) beyond the intermediate position relative to the outer lid 9.

[0100] From this state, the inner plug 10 is pushed into the outer lid 9 while the slide rib 31c is engaged in the slide groove 31a and the rib wall 23a is engaged between the pair of slide protrusions 31b, thereby sliding the inner plug 10 to the attached position. This makes it impossible for the inner plug 10 to rotate relative to the outer lid 9 from the attached position, and only allows it to move in the sliding direction (from the attached position to the intermediate position) when removing it.

[0101] At this time, the pair of locking protrusions 25a, 25b are locked with the pair of locking recesses 26a, 26b, and the first locking portion 25 is locked with the second locking portion 26. This makes it possible to attach the inside plug 10 to the outer lid 9.

[0102] In addition, in the detachment mechanism 11B, the cap body 8 (cap unit 1B) is attached to the container body 2 by threading the male thread portion 14 of the inside plug 10 into the female thread portion 6 of the container body 2, so that the flange portion 10d of the inside plug 10 presses the upper wall portion 9b of the outer lid 9 from above. This prevents the outer lid 9 from rattling in the vertical direction, making it possible to securely close the container body 2.

[0103] When removing the cap body 8 (cap unit 1B) from the container body 2, the procedure is the same as when it was attached, except that the rotation direction is reversed. That is, when the outer lid 9 of the cap body 8 is grasped and rotated relative to the container body 2 in the opposite direction to that used for attachment, the rib wall 23b comes into contact with the stopper 22h, and the rib wall 23a comes into contact with the slide protrusion 31b, causing the inside stopper 10 to rotate integrally with the outer lid 9. This allows the cap body 8 to be removed from the container body 2.

[0104] On the other hand, in the detachment mechanism 11B, the engagement between the slide groove 31a and the slide rib 31c is released, and the engagement between the pair of slide protrusions 31b and the rib wall 23a is also released by performing the reverse operation to the above-described operation, i.e., by sliding the inside plug 10 relative to the outer lid 9 in the opposite direction to the above-described direction. Similarly, the engagement between the first locking portion 25 and the second locking portion 26 is released, and the inside plug 10 is slid relative to the outer lid 9 from the attached position to the intermediate position.

[0105] At this time, a clicking sensation is given, similar to that of the above-mentioned installation. This makes it possible to prevent unintentional movement in the sliding direction. Furthermore, when sliding from the installation position to the intermediate position, the clicking sensation allows the user to recognize that the slide has been completed.

[0106] From this state, the inside plug 10 is rotated to the removal position relative to the outer lid 9. When the inside plug 10 is rotated to the removal position relative to the outer lid 9, the rib wall 23a comes into contact with the stopper 22h, thereby preventing the inside plug 10 from rotating beyond the removal position relative to the outer lid 9 in the other direction (removal direction).

[0107] At this time, notched recess 22a and rib wall 23a are aligned, and notched recesses 22b and 22c are aligned with rib walls 23b and 23c, so that inside plug 10 can be pulled upward through opening 9c of outer lid 9. This makes it possible to remove inside plug 10 from outer lid 9.

[0108] Here, the inside stopper 10 can only be removed from the outer lid 9 when the cap body 8 is removed from the container body 2. In other words, when the cap body 8 is attached to the container body 2, it is impossible to pull the inside stopper 10 upward or pull the outer lid 9 downward. Therefore, when the cap body 8 is attached to the container body 2, the inside stopper 10 will not be accidentally removed from the outer lid 9.

[0109] Compared to the cap unit 1A of the first embodiment described above, the cap unit 1B of this embodiment has a configuration in which a slide locking portion 27 is added. Therefore, before the inside plug 10 moves from the attached position to the removed position relative to the outer lid 9, it is necessary for the inside plug 10 to slide to move to the intermediate position. In other words, the operation of sliding the inside plug 10 from the attached position to the intermediate position essentially corresponds to the unlocking operation, and the outer lid 9 will not rotate from the attached position relative to the inside plug 10 unless a sliding operation is performed.

[0110] Furthermore, when the cap body 8 with the outer lid 9 and inside plug 10 in the attached position is attached to or detached from the container body 2, the slide locking portion 27 passes through an intermediate position, so that the rotation axis of the outer lid 9 relative to the inside plug 10 is already eccentric with respect to the rotation axis when the cap body 8 is attached to or detached from the container body 2 before rotation. This makes it possible to more reliably prevent the outer lid 9 from rotating relative to the inside plug 10 due to the rotation when the cap body 8 is attached to or detached from the container body 2, i.e., the occurrence of so-called co-rotation.

[0111] In the cap unit 1B of this embodiment, the inner stopper 10 is detachably attached to the outer lid 9, so that the outer lid 9 and the inner stopper 10 can be washed separately, and the space between the outer lid 9 and the inner stopper 10 can be kept hygienic.

[0112] Therefore, the capped container 100B equipped with such a cap unit 1B can be made even easier to use.

[0113] 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 units 1A and 1B are configured such that the inner stopper 10 is attached to the container body 2 by screwing while being fitted into the inside from the upper opening 2a of the container body 2, but this is not necessarily limited to such a configuration. For example, the cap units 1A and 1B can also be configured such that the outer lid 9 is attached to the container body 2 by screwing while covering the upper opening 2a of the container body 2 from the outside.

[0114] In this configuration, instead of the above-mentioned female screw portion 6 and male screw portion 14, the outer lid 9 (cap body 8) can be removably attached to the container body 2 by screwing together a male screw portion provided on the outer peripheral surface of the neck portion 2d and a female screw portion provided on the inner peripheral surface of the peripheral wall portion 9a that constitutes the outer lid 9.

[0115] Furthermore, the capped containers 100A, 100B are configured to directly open and close the upper opening 2a of the container body 2, but are not necessarily limited to this configuration. For example, the cap units 1A, 1B may be detachably attached to a shoulder member attached to the container body 2.

[0116] Furthermore, it is also possible to configure the lid so that it can be opened and closed freely on the cap body that is attached to the container body 2. In this configuration, the lid may be attached to the cap body by screwing, or the lid may be attached to the cap body via a hinge so that it can be rotated freely.

[0117] In the above embodiment, the present invention is exemplified as being applied to a beverage container having a heat-retaining (or cold-retaining) function provided by a container body 2 having the above-mentioned vacuum insulation structure, but the present invention can be widely applied to a lidded container having a container body and a lid that can be attached and detached to the container body. [Explanation of symbols]

[0118] DESCRIPTION OF SYMBOLS 1A, 1B... Cap unit 2... Container body 3... Outer container 4... Inner container 5... Vacuum insulation layer 6... Female thread portion 7... Protruding portion 8... Cap body 9... Outer lid 9c... Opening 10... Inner plug 10d... Flange portion 10e... First recess 10f... Second recess 10g... Third protrusion 11A, 11B... Detachment mechanism 12... Lower plug member 13... Upper plug member 14... Male thread portion 15... Watertight packing 16... First engagement portion 16a, 16b... Notched recess 16c, 16d... Guide wall 16e, 16f, 16g, 16h... Stopper 17... Second engagement portion 17a, 17b... Rib wall 17c, 17d... Guide groove 18... Guide engagement portion 19... First locking portion DESCRIPTION OF SYMBOLS 20... Second locking portion 21... Rotating locking portion 22... First engagement portion 22a, 22b, 22c... Notched recess 22d, 22e, 22f... Guide wall 22g, 22h... Stopper 23... Second engagement portion 23a, 23b, 23c... Rib wall 23d, 23e, 23f... Guide groove 24... Guide engagement portion 25... First locking portion 25a, 25b... Locking protrusion 26... Second locking portion 26a, 26b... Locking recess 27... Slide locking portion 28... Marking protrusion 29... Marking recess 30... Protrusion 31a... Slide groove 31b... Slide protrusion 31c... Slide rib 100A, 100B... Capped container

Claims

1. A cap unit that can be detachably attached to a container body having an open top, an outer lid surrounding the top of the container body; an inside plug fitted into the container body from an upper opening of the container body; a detachment mechanism for detachably attaching the inner plug to the outer lid, The detachment mechanism is characterized in that the inner plug is attached to the outer lid by rotating the inner plug around its axis from a removal position where the central axis of the outer lid, which passes through the center of the outer lid and is circular in top view, is eccentric with respect to the central axis of the inner plug, which passes through the center of the inner plug and is circular in top view, to an attachment position where the central axes of the outer lid and the inner plug are aligned.

2. A cap unit that can be detachably attached to a container body having an open top, an outer lid surrounding the top of the container body; an inside plug fitted into the container body from an upper opening of the container body; a detachment mechanism for detachably attaching the inner plug to the outer lid, The detachment mechanism is characterized in that the inner plug is attached to the outer lid by rotating the inner plug around its axis from a removal position where the central axis of the outer lid, which passes through the center of the outer lid and is circular in top view, is eccentric with respect to the central axis of the inner plug, which passes through the center of the inner plug and is circular in top view, and then sliding the inner plug to an attachment position.

3. A cap unit as described in claim 1 or 2, characterized in that in the removal position, the inner plug is inserted from above into the opening provided at the top of the outer lid, and the flange portion protruding in the radially expanding direction from the outer periphery of the upper end side of the inner plug is abutted against the periphery of the opening of the outer lid, thereby engaging the inner plug with the outer lid.

4. In the removal position, the inner plug is inserted from above into the opening provided at the top of the outer lid, and the flange portion protruding in the radially expanding direction from the outer periphery of the upper end side of the inner plug is brought into contact with the periphery of the opening of the outer lid, thereby engaging the inner plug with the outer lid, the detachment mechanism includes a guide engagement portion that guides the inside plug rotatably relative to the outer lid between the removal position and the attachment position by engaging a first engagement portion provided on the outer lid with a second engagement portion provided on the inside plug; The cap unit according to claim 1, characterized in that it is provided with a rotational locking portion in which, when the inner plug is rotated to the mounting position, either a first locking portion provided on the outer lid or a second locking portion provided on the inner plug is locked to the other locking portion.

5. In the removal position, the inner plug is inserted from above into the opening provided at the top of the outer lid, and the flange portion protruding in the radially expanding direction from the outer periphery of the upper end side of the inner plug is brought into contact with the periphery of the opening of the outer lid, thereby engaging the inner plug with the outer lid, the detachment mechanism includes a guide engagement portion that guides the inside plug rotatably relative to the outer lid between the removal position and the attachment position by engaging a first engagement portion provided on the outer lid with a second engagement portion provided on the inside plug; The cap unit according to claim 2, characterized in that it is provided with a slide locking portion in which, when the inner plug is slid to the mounting position, either a first locking portion provided on the outer lid or a second locking portion provided on the inner plug is locked to the other locking portion.

6. 6. The cap unit according to claim 4, wherein a clicking sensation is given when the one locking portion is locked with the other locking portion.

7. 7. The cap unit according to claim 1, wherein the inner plug or the outer lid is attached to the container body by screwing.

8. A cap unit as described in any one of claims 1 to 7, characterized in that it is provided with a waterproof gasket that is integrally attached to the outer periphery of the lower end side of the inner plug and seals the space between the container body and the inner plug.

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

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