Cap unit and container with cap

Abstract

To provide a cap unit capable of preventing an inner plug from falling off from a lower surface inside an outer lid even when the inner plug is peeled from the lower surface inside the outer lid.SOLUTION: The cap unit 1A is detachably attached to a vessel body 2 having an open upper portion, and includes a cap body 9 that closes an upper opening 2a of the vessel body 2, and the cap body 9 includes an outer lid 10 that covers the upper opening 2a of the vessel body 2, an inner plug 11 that is fitted into the vessel body 2 from the upper opening 2a, and a temporary fixing mechanism 20A that temporarily fixes the inner plug 11 to a lower surface inside the outer lid 10. The inner plug 11 is integrally joined to the lower surface on the inner side of the outer lid 10 in a state of being temporarily fixed by the temporary fixing mechanism 20A so as to prevent the inner plug 11 from falling off from the outer lid 10.SELECTED DRAWING: Figure 2

Description

[Technical Field]

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

[0002] BACKGROUND ART Conventionally, there have been capped containers equipped with a cap unit (plug) that is detachably attached to a container body having an open top to open and close the top opening of the container body (see, for example, Patent Documents 1 and 2 listed below).

[0003] Such a cap unit has an outer lid that covers the upper opening 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 inner stopper or outer lid is attached to the container body by screwing. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 5929510 [Patent Document 2] Japanese Patent Application Laid-Open No. 2002-37351 Summary of the Invention [Problem to be solved by the invention]

[0005] In the above-mentioned conventional cap unit, the inner plug is integrally attached to the lower surface of the inner side of the outer lid by ultrasonic welding, high-frequency welding, or the like.

[0006] However, with this configuration, if there is a problem with the joint, for example, it is necessary to consider the possibility that stress will be applied to the joint surface between the inner underside of the outer lid and the inner stopper while the cap unit is repeatedly attached and detached from the container body, causing the inner stopper to peel off from the inner underside of the outer lid.

[0007] Furthermore, if the inner plug peels off from the underside of the inside of the outer lid, the inner plug will fall off from the underside of the inside of the outer lid, so measures to prevent this are needed to provide a product that is safer to use.

[0008] The present invention has been proposed in consideration of the above-mentioned conventional circumstances, and aims to provide a cap unit that can prevent the inner stopper from falling off from the inner underside of the outer lid even if the inner stopper peels off from the inner underside of the outer lid, and a capped container that is safer and more user-friendly by being equipped with such a cap unit. [Means for solving the problem]

[0009] In order to achieve the above object, the present invention provides the following means. [1] A cap unit that can be detachably attached to a container body having an open top, a cap body that closes an upper opening of the container body, The cap body includes an outer lid that covers an upper opening of the container body; an inside plug fitted into the container body from the upper opening; a temporary fastening mechanism that temporarily fastens the inner plug to the inner lower surface of the outer lid to prevent the inner plug from falling off, A cap unit characterized in that the inner plug is joined integrally to the inner underside of the outer lid while the inner plug is temporarily fastened to the outer lid by the temporary fastening mechanism. [2] The cap unit described in [1] is characterized in that the temporary fastening mechanism has an engaging portion provided on either the outer lid or the inner plug, and an engaged portion provided on the other, and when the engaging portion engages with the engaged portion, the inner plug is temporarily fastened to the inner underside of the outer lid. [3] The cap unit described in [2] is characterized in that, in the positional relationship between the engaged portion and the engaging portion when the engaging portion is engaged with the engaged portion, a gap is provided to allow the inner plug to move in the direction of joining to the inner underside of the outer lid. [4] The cap unit described in [2], characterized in that the temporary fastening mechanism engages the engaging portion with the engaged portion by rotating the inner plug around its axis relative to the inner underside of the outer lid. [5] The cap unit according to any one of [1] to [4] above; A capped container comprising: a container body to which the cap unit is attached. [Effects of the Invention]

[0010] As described above, according to the present invention, a cap unit is provided that can prevent the inner stopper from falling off from the inner underside of the outer lid even if the inner stopper peels off from the inner underside of the outer lid, and a capped container that is equipped with such a cap unit, making it safer and easier to use. [Brief explanation of the drawings]

[0011] [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 of the capped container taken along line AA shown in FIG. 1. [Figure 3] 2 is a cross-sectional view of a capped container taken along line BB shown in FIG. 1. [Figure 4] 2 is a perspective view of an outer lid constituting the cap unit shown in FIG. 1, seen from below. [Figure 5] 2 is a perspective view of an inside plug constituting the cap unit shown in FIG. 1, seen from above. FIG. [Figure 6] FIG. 6 is a perspective view of the inside plug shown in FIG. 5, seen from below. [Figure 7]3(a) is a cross-sectional view showing a state in which the inside plug is being temporarily fastened to the outer lid of the cap unit shown in FIG. 2, and FIG. 3(b) is a cross-sectional perspective view of the same. [Figure 8] 3(a) is a cross-sectional view showing a state in which an inside plug is temporarily fastened to an outer lid of the cap unit shown in FIG. 2, and FIG. 3(b) is a cross-sectional perspective view of the same. [Figure 9] 3(a) is a cross-sectional view showing a state in which an inside plug is joined in a temporarily fixed state to an outer lid of the cap unit shown in FIG. 2, and FIG. 3(b) is a cross-sectional perspective view of the same. [Figure 10] 4 is a cross-sectional view showing a state in which an inside plug is joined to the outer lid of the cap unit shown in FIG. 3. FIG. [Figure 11] 1. FIG. 4 is a cross-sectional view of a cap unit according to a second embodiment of the present invention, taken along line AA in FIG. [Figure 12] 12 is a cross-sectional view of the cap unit shown in FIG. 11, corresponding to line BB shown in FIG. [Figure 13] 1. FIG. 5 is a cross-sectional view of a cap unit according to a third embodiment of the present invention, taken along line AA in FIG. [Figure 14] 14 is a cross-sectional view of the cap unit shown in FIG. 13, corresponding to line BB shown in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0012] 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 100 including a cap unit 1A shown in, for example, FIGS. 1 to 10 will be described.

[0013] FIG. 1 is a perspective view showing the appearance of a capped container 100 including a cap unit 1A. FIG. 2 is a cross-sectional view of the capped container 100 taken along line AA in FIG. 1. FIG. 3 is a cross-sectional view of the capped container 100 taken along line BB in FIG. 1. FIG. 4 is a perspective view of the outer lid 10 constituting the cap unit 1A, seen from below. FIG. 5 is a perspective view of the inside plug 11 constituting the cap unit 1A, seen from above. FIG. 6 is a perspective view of the inside plug 11, seen from below. FIG. 7(a) is a cross-sectional view showing a state in which the inside plug 11 is in the process of being temporarily fastened to the outer lid 10 of the cap unit 1A. FIG. 7(b) is a cross-sectional perspective view of the same. FIG. 8(a) is a cross-sectional view showing a state in which the inside plug 11 has been temporarily fastened to the outer lid 10 of the cap unit 1A. FIG. 8(b) is a cross-sectional perspective view of the same. FIG. 9(a) is a cross-sectional view showing a state in which the inside plug 11 has been joined to the outer lid 10 of the cap unit 1A while still temporarily fastened. FIG. 9(b) is a cross-sectional perspective view of the same. FIG. 10 is a cross-sectional view showing a state in which the inside plug 11 is joined to the outer lid 10 of the cap unit 1A.

[0014] As shown in FIGS. 1, 2 and 3, a capped container 100 of this embodiment includes a cap unit 1A of this embodiment and a container body 2 to which the cap unit 1A is detachably attached.

[0015] The capped container 100 is a beverage container that can keep a beverage (liquid) contained in the container body 2 hot or cold using a container body 2 that has a vacuum insulation structure. In the capped container 100, an upper opening 2a of the container body 2 can be opened and closed using a cap unit 1A that is attached to the container body 2 by screwing.

[0016] The direction in which the central axis C extends is the up-down direction, and the direction perpendicular to the central axis C is called the radial direction or horizontal direction. Within the radial direction, the direction approaching the central axis C is called the radially inner direction or simply the inner direction, and the direction away from the central axis C is called the radially outer direction or simply the outer direction. Furthermore, the direction circumferentially around the central axis C is called the axial direction or circumferential direction.

[0017] Specifically, the container body 2 has a cylindrical outer container 3 and an inner container 4 with a bottom made of, for example, stainless steel, and is configured as a double-structure container in which the outer container 3 is housed inside the inner container 4 and the periphery of their openings are joined together. A vacuum insulation layer 5 is provided between the outer container 3 and the inner container 4. The vacuum insulation layer 5 can be formed, for example, by blocking a vent hole provided on the bottom surface of the outer container 3 in a chamber that has been reduced to a high vacuum (evacuated).

[0018] The container body 2 has a substantially circular bottom 2b, a body 2c that stands up in a substantially cylindrical shape from the outer periphery of the bottom 2b, a shoulder 2d that gradually reduces in diameter at the upper side of the body 2c, and a mouth / neck 2e that stands up in a substantially cylindrical shape from the shoulder 2d. The upper end of the mouth / neck 2e opens in a circular shape as the upper opening 2a of the container body 2.

[0019] The inner circumferential surface of the neck portion 2e (upper side of the body portion 2c) is smaller in diameter than the inner circumferential surface of the body portion 2c. The inner circumferential surface of the neck portion 2e is provided with a female thread portion 6. Furthermore, below the female thread portion 6, a ring-shaped protrusion portion 7 is provided so as to protrude from the inner circumferential surface of the inner container 4 around the entire circumference.

[0020] The container body 2 has a structure in which a resin bottom member 8 is attached to the bottom 2b. The bottom member 8 is formed into a cylindrical shape with a bottom as a whole, and is attached in a state in which it covers the container body 2 from the bottom 2b to the lower end side of the trunk 2c.

[0021] In the capped container 100 of this embodiment, the container body 2 has an overall substantially cylindrical external shape, but the external shape of the container body 2 is not particularly limited and can be modified as appropriate to suit the size, design, etc. In addition, the outer peripheral surface of the container body 2 may be painted, printed, or the like.

[0022] The cap unit 1A of this embodiment constitutes a stopper that closes the upper opening 2a of the container body 2. Specifically, this cap unit 1A includes a cap body 9 that is attached to the container body 2 by screwing while covering the upper opening 2a of the container body 2.

[0023] The cap body 9 has an outer lid 10 that covers the upper opening 2a of the container body 2, and an inside plug 11 that is fitted into the inside of the container body 2 through the upper opening 2a.

[0024] The outer lid 10 is made of, for example, a heat-resistant resin. The outer lid 10 has an outer peripheral wall portion 10a formed in a substantially cylindrical shape so as to be continuous with the barrel portion 2c of the container body 2, a top wall portion 10b that closes the upper part of the outer peripheral wall portion 10a, and an inner peripheral wall portion 10c that is formed so as to extend downward from the underside of the top wall portion 10b (outer lid 10). In this embodiment, the inner peripheral wall portion 10c has a configuration that extends downward in a substantially cylindrical shape from the center of the underside of the top wall portion 10b (outer lid 10).

[0025] A handle portion 12 is integrally provided on the upper portion of the top wall portion 10b. That is, in a capped container 100 equipped with this cap unit 1A, it is possible to carry the capped container 100 while gripping the handle portion 12. The shape of the handle portion 12 is not particularly limited. For example, the handle portion 12 of this embodiment has an arch shape that rises upward from the upper surface of the top wall portion 10b and is connected in the radial direction.

[0026] Additionally, a non-slip ring member 13 is detachably provided on the outer peripheral surface of outer peripheral wall portion 10a. Ring member 13 is made of an elastic material such as heat-resistant rubber or elastomer, for example, silicone rubber. Ring member 13 is fitted into a ring-shaped recess 10d provided around the entire outer peripheral surface of outer peripheral wall portion 10a, thereby being provided continuously with the outer peripheral surface of outer peripheral wall portion 10a.

[0027] The inside plug 11 is made of, for example, a heat-resistant resin. The inside plug 11 has a substantially circular bottom wall 11a and a peripheral wall 11b that rises in a substantially cylindrical shape from the outer periphery of the bottom wall 11a. The inside plug 11 and the outer lid 10 are joined together by a welding method such as ultrasonic welding or high-frequency welding, with the center of the inside plug 11 aligned with the central axis C and the upper end of the peripheral wall 11b abutting against the central portion of the lower surface of the top wall 10b. As a result, the inside plug 11 is located in the center of the inside of the outer lid 10, with the central axis C aligned. Note that the inside of the inside plug 11 is not limited to air as an insulating layer, and may be configured with an insulating material (not shown) disposed therein.

[0028] Additionally, a male screw portion 14 is provided on the outer peripheral surface of the inside plug 11. In the capped container 100, the cap body 9 (cap unit 1A) is detachably attached to the container body 2 by screwing the male screw portion 14 into the female screw portion 6.

[0029] Furthermore, the female screw portion 6 and the male screw portion 14 are double-threaded threads that are complementary to each other. When a double-threaded thread is used, the cap body 9 (cap unit 1A) can be attached to and detached from the container body 2 with a small rotational movement (approximately 180° in this embodiment).

[0030] A waterproof gasket 15 is detachably attached to the lower end of the inside plug 11. The waterproof gasket 15 is a ring-shaped sealing member that seals the gap between the inside of the container body 2 and the inside plug 11 (cap body 9), and is made of an elastic material such as heat-resistant rubber, elastomer, or the like, for example, silicone rubber.

[0031] On the other hand, a flange portion 11c is provided at the lower end side of the bottom wall portion 11a so as to protrude in the radial direction. A waterproof gasket 15 is fitted around the entire periphery of this flange portion 11c.

[0032] Additionally, two elastic flange portions 15a are provided on the outer peripheral surface of the watertight gasket 15, protruding over the entire circumference in the radially expanding direction. When the cap body 9 is attached to the container body 2 by screwing, the elastic flange portions 15a 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 11 (cap body 9).

[0033] On the other hand, waterproof gasket 15 can be removed from flange portion 11c by elastically deforming (pulling and stretching) itself. This allows cap body 9 and waterproof gasket 15 to be washed separately, and the space between waterproof gasket 15 and flange portion 11c can be kept hygienic.

[0034] The watertight gasket 15 is not necessarily limited to the shape described above, and for example, the number of elastic flange portions 15a is not limited to the two described above, but may be one or more. The watertight gasket 15 is not necessarily limited to a configuration provided with the elastic flange portions 15a described above, and its shape, etc., can be modified as appropriate. The watertight gasket 15 may also be molded integrally with the inside plug 11.

[0035] In the capped container 100 of this embodiment having the above-described configuration, the inner stopper 11 is fitted into the inside of the container body 2 from the upper opening 2a, and then the outer lid 10 (cap body 9) can be rotated clockwise (hereinafter referred to as the "closing direction") relative to the container body 2 when viewed from above, thereby attaching the cap unit 1A to the container body 2 by screwing the female screw portion 6 and the male screw portion 14 together.

[0036] On the other hand, when the cap body 9 (cap unit 1A) is attached to the container body 2, the outer lid 10 (cap body 9) can be rotated counterclockwise (hereinafter referred to as the "opening direction") relative to the container body 2 to release the threaded engagement between the female thread portion 6 and the male thread portion 14, thereby making it possible to remove the cap unit 1A from the container body 2.

[0037] The cap unit 1A of this embodiment has a temporary fastening mechanism 20A that temporarily fastens the inside plug 11 to the lower surface of the inside of the outer lid 10. The cap unit 1A of this embodiment has a structure in which the inside plug 11 is integrally joined to the lower surface of the inside of the outer lid 10 by welding, while the inside plug 11 remains temporarily fastened by the temporary fastening mechanism 20A to prevent it from falling off the outer lid 10.

[0038] Specifically, as shown in Figures 4 to 6, this temporary fastening mechanism 20A has an engaging portion 21 provided on either the outer lid 10 or the inner plug 11 (in this embodiment, the inner plug 11), and an engaged portion 22 provided on the other (in this embodiment, the outer lid 10).

[0039] The engaging portion 21 is configured by a pair of protrusions 21a provided at opposing positions on the inner circumferential surface of the peripheral wall portion 11b. The pair of protrusions 21a are provided so as to protrude inward in an inverted U-shape (approximately C-shape) from opposing positions on the inner circumferential surface of the peripheral wall portion 11b.

[0040] On the other hand, the engaged portion 22 is composed of a pair of slits 22a provided at opposing positions on the inner peripheral wall portion 10c of the outer lid 10. The pair of slits 22a is open at one horizontal end and is composed of a horizontal slit portion 22b cut out toward the other horizontal end, and a vertical slit portion 22c cut out upward from the other end of the horizontal slit portion 22b.

[0041] The engaged portion 22 is also provided with a pair of arm portions 10f that extend horizontally in a hook-like shape toward the other end so as to form the lower side of the horizontal slit portion 22b, and a pair of engaging protrusions 10g that rise upward (toward the inside of the horizontal slit portion 22b) from the upper surface side of the pair of arm portions 10f at one end side of the width of the vertical slit portion 22c.

[0042] In addition, the engaged portion 22 is provided with a pair of other-end side wall portions 22d extending in the vertical direction from the rear of the other end side of the horizontal slit portion 22b to form a vertical slit portion 22c, and a pair of one-end side wall portions 22e extending in the vertical direction from one end side of the pair of other-end side wall portions 22d to form the vertical slit portion 22c.

[0043] Additionally, a pair of rib walls 23 extending vertically in the shape of long plates is provided on the inner peripheral surface of peripheral wall portion 11b of inside plug 11. The pair of rib walls 23 are provided so as to protrude inward from opposing positions on the inner peripheral surface of peripheral wall portion 11b. The pair of protrusions 21a and the pair of rib walls 23 are provided at positions on the inner peripheral surface of peripheral wall portion 11b where their diagonal directions intersect.

[0044] In this embodiment, the pair of protrusions 21a and the pair of rib walls 23 are provided at positions on the inner peripheral surface of the peripheral wall 11b where their diagonal directions are generally perpendicular to each other. In other words, the protrusions 21a and the rib walls 23 are provided alternately at approximately 90° intervals in the circumferential direction of the peripheral wall 11b.

[0045] On the other hand, the inner wall portion 10c of the outer lid 10 is provided with a pair of horizontal lower end portions 24 located circumferentially between the pair of slits 22a and extending horizontally in the circumferential direction from one end side to the other end side corresponding to the vertical length of the pair of rib walls 23, as shown in Figures 7(a) and (b), a pair of vertical cutout portions 25 cut upward from the other end side of the pair of horizontal lower end portions 24 to the underside of the top wall portion 10b corresponding to the circumferential thickness of the pair of rib walls 23, and a pair of abutment wall portions 10e extending downward from the wall surface on the other end side of the vertical cutout portions 25.

[0046] Additionally, a downwardly recessed circular ring-shaped engagement groove 26 is provided around the entire periphery at the upper end of the peripheral wall 11b of the inside plug 11. Meanwhile, a downwardly protruding circular ring-shaped engagement protrusion 27a is provided on the underside of the inside (top wall 10b) of the outer lid 10 along the outer periphery of the inner peripheral wall 10c. The engagement protrusion 27a is engaged with the engagement groove 26.

[0047] Furthermore, a pair of grooves 27b are provided on the inner and outer circumferential sides of the engaging protrusion 27a, cutting upward in a circular ring shape into the lower surface of the inner side (top wall 10b) of the outer lid 10 down to the lower surface of the top wall 10b. As a result, when the engaging protrusion 27a is engaged with the engaging groove 26, the upper end of the peripheral wall 11b of the inside plug 11 is engaged with the pair of grooves 27b.

[0048] In the temporary fastening mechanism 20A, the inner plug 11 is rotated circumferentially around the axis relative to the inner underside of the outer lid 10, whereby the engaging portion 21 engages with the engaged portion 22, and the inner plug 11 is temporarily fastened to the inner underside of the outer lid 10 to prevent it from falling off.

[0049] Specifically, first, as shown by the arrows in Figures 7(a) and 7(b), the pair of protrusions 21a are engaged with the horizontal slits 22b of the pair of slits 22a, and then the inside plug 11 is rotated around its axis relative to the lower inner surface of the outer lid 10, as shown in Figures 10 and 11. At this time, the inside plug 11 rotates with the other circumferential end side of the pair of protrusions 21a (the left closed side of the C-shape) as the leading side.

[0050] As a result, the pair of protrusions 21a engaged with the pair of slits 22a are guided from one end side to the other end side of each horizontal slit portion 22b, and the protrusions 21a of the inner plug 11 are engaged with the horizontal slit portion 22b (arm portion 10f) formed on the inner underside of the outer lid 10, resulting in a temporary fastening state to prevent it from falling off.

[0051] The lower corner 21b on the other end of the pair of protrusions 21a is rounded to have a large R shape, so that it is easily guided into the horizontal slit 22b.

[0052] Similarly, as shown by the arrows in Figures 7(a) and (b), from a state in which a pair of rib walls 23 are positioned on one end side of the horizontal lower end portion 24, by rotating the middle plug 11 around its axis against the inner underside of the outer lid 10, as shown in Figures 8(a) and (b), the pair of rib walls 23 move to the other end side of the horizontal lower end portion 24, and the pair of rib walls 23 come into contact with a pair of abutment wall portions 10e.

[0053] This prevents the inside plug 11 from rotating any further relative to the outer lid 10, and the pair of contact walls 10e and the pair of rib walls 23 function as a rotation stopper (positioning).

[0054] 8(a) and 8(b), the positions where the pair of rib walls 23 abut against the pair of abutting wall portions 10e correspond to the positions where the pair of protrusions 21a are guided to the rear of the other end side of the horizontal slit portion 22b. Therefore, in this embodiment, the pair of abutting wall portions 10e and the pair of rib walls 23 act as rotation prevention devices, but the rotation prevention device may also be configured to ...

[0055] In addition, in the temporary fastening mechanism 20A of this embodiment, by rotating the inner plug 11 counterclockwise when viewed from above relative to the inner underside of the outer lid 10, a pair of protrusions 21a of the inner plug 11 engage with the horizontal slit portion 22b (arm portion 10f) formed on the inner underside of the outer lid 10 to prevent it from falling off, thereby temporarily fastening it.

[0056] When attaching the cap body 9 to the container body 2, the outer lid 10 is rotated clockwise when viewed from above in the closing direction, so that a force is applied between the outer lid 10 and the inner stopper 11 in a direction in which the pair of abutment wall portions 10e abut against the pair of rib walls 23, or the pair of other end side wall portions 22d abut against the other end sides of the pair of protrusion portions 21a.

[0057] Therefore, as will be described later, even if the inside plug 11 is peeled off from the outside lid 10, it is possible to attach the cap unit 1A to the container body 2. Conversely, if it is desired to stably remove the cap unit 1A from the container body 2 when the bond between the outside lid 10 and the inside plug 11 is damaged, the inside plug 11 can be temporarily fixed to the inside bottom surface of the outside lid 10 by rotating the inside plug 11 clockwise in a top view relative to the inside bottom surface of the outside lid 10.

[0058] Next, as shown by the arrows in Figures 8(a) and (b), while the pair of protrusions 21a of the inner plug 11 are temporarily fastened to the horizontal slit portion 22b (arm portion 10f) formed on the inner underside of the outer lid 10, the inner plug 11 is moved upward relative to the inner underside of the outer lid 10, as shown in Figures 9(a), (b) and 10.

[0059] As a result, the pair of protrusions 21a engaged with the pair of slits 22a are guided upwardly of the respective vertical slits 22c, and the pair of rib walls 23 are engaged with the pair of vertical notches 25.

[0060] In other words, this vertical slit portion 22c forms a gap that allows the protrusion portion 21a of the inner plug 11 to move upward (in the direction of joining) relative to the inner underside of the outer lid 10, in the positional relationship between the engaged portion 22 and the engaging portion 21 when the engaging portion 21 is engaged with the engaged portion 22.

[0061] Furthermore, with the engaging projection 27a engaged with the engaging groove 26 over the entire circumference, the upper end of the peripheral wall 11b of the inside plug 11 is engaged with each of the pair of grooves 27b over the entire circumference. In this state, it is possible to join the upper end side of the peripheral wall 11b of the inside plug 11 to the lower surface of the inside of the outer lid 10.

[0062] In this embodiment, the joining is performed between the engagement groove 26 of the inside plug 11 and the engagement protrusion 27a of the outer lid 10. However, the joining may also be performed between the upper end of the peripheral wall portion 11b of the inside plug 11 and the pair of groove portions 27b. In addition, the joining can be changed as appropriate depending on the joining conditions.

[0063] Furthermore, in the temporary fastening mechanism 20A of this embodiment, as shown in Figures 9(a), (b) and 10, when a pair of protrusions 21a are engaged with the vertical slit portion 22c, the other end sides of the pair of protrusions 21a face the other end side wall portion 22d and one end side (the right open side of the C-shape) faces the one end side wall portion 22e, respectively.

[0064] When the inner lower surface of the outer lid 10 and the inside stopper 11 are joined, either the other end or one end of the pair of protrusions 21a is often positioned in contact due to the nature of the joint. Therefore, when attaching or detaching the cap body 9 (cap unit 1A) to the container body 2, if the other end of the pair of protrusions 21a is in contact with the other end side wall portion 22d, it is possible to prevent stress in the direction of separation from being applied to the joint surface between the inner lower surface of the outer lid 10 and the inside stopper 11 due to the circumferential force caused by rotation in the closing direction.

[0065] Conversely, when one end of the pair of protrusions 21a abuts against one end side wall 22e, it is possible to prevent stress in the direction of separation from the circumferential force caused by rotation in the opening direction being applied to the joint surface between the inner lower surface of outer lid 10 and inner plug 11. This makes it possible to prevent separation between outer lid 10 and inner plug 11.

[0066] In this embodiment, the temporarily fastened state does not only include a state in which a pair of protrusions 21a of the inner plug 11 are engaged (placed) with the horizontal slit portion 22b (arm portion 10f) formed on the inner underside of the outer lid 10 as shown in Figures 8(a) and (b), but also a state in which the inner plug 11 has moved upward while the engaging portion 21 is engaged with the engaged portion 22 as shown in Figures 9(a) and (b).

[0067] 9(a) and (b), gravity moves the inside plug 11 downward to the position shown in Figures 8(a) and (b), and as a result, the protrusion 21a of the inside plug 11 engages with the horizontal slit 22b (arm 10f) formed on the inside underside of the outer lid 10. Therefore, the temporarily fastened state in this embodiment means a state in which the inside plug 11 is prevented from falling off due to gravity.

[0068] In the cap unit 1A of this embodiment having the above-described configuration, the inner stopper 11 is joined integrally to the inner underside of the outer lid 10 while remaining in a temporarily fixed state using the above-described temporary fixing mechanism 20A to prevent the inner stopper 11 from falling off the outer lid 10.

[0069] In this configuration, even if the inner stopper 11 peels off from the inner underside of the outer lid 10 due to a defect in the joint or the like, the inner stopper 11 is temporarily fastened to the outer lid 10 by the above-mentioned temporary fastening mechanism 20A, so it is possible to prevent the inner stopper 11 from falling off from the inner underside of the outer lid 10.

[0070] In particular, in the cap unit 1A of this embodiment, the cap body 9 is configured to be freely attached and detached to the container body 2 by screwing while the handle portion 12 is gripped, so that stress is easily applied to the joint surface between the inner underside of the outer lid 10 and the inner stopper 11 as the cap body 9 (cap unit 1A) is repeatedly attached and detached to and from the container body 2.

[0071] In contrast, in the cap unit 1A of this embodiment, even if the inner stopper 11 peels off from the inner underside of the outer lid 10, the inner stopper 11 is temporarily fastened to the outer lid 10 by the above-mentioned temporary fastening mechanism 20A, thereby preventing the inner stopper 11 and the container body 2 from falling off from the inner underside of the outer lid 10, making it possible to use the cap unit 1A more safely.

[0072] Furthermore, in the outer lid 10, a pair of engaging protrusions 10g are provided in the horizontal slit portion 22b (arm portion 10f), so that even if the inner plug 11 is peeled off from the inner underside of the outer lid 10, the lower end portion on one end side of the pair of protrusions 21a of the inner plug 11 will engage circumferentially with the pair of engaging protrusions 10g.

[0073] Therefore, the inner stopper 11 is prevented from being rotated in the opposite direction to the arrow in Figures 7(a) and (b) relative to the outer lid 10, and by maintaining the inner stopper 11 in a temporarily fixed state to the outer lid 10, it is possible to prevent the inner stopper 11 and the container body 2 from falling off the outer lid 10.

[0074] In addition, in the cap unit 1A of this embodiment, when the inner stopper 11 is integrally joined to the inner underside of the outer lid 10, a pair of protrusions 21a are engaged with a pair of slits 22a, and a pair of rib walls 23 are engaged with a pair of vertical cutouts 25.

[0075] In this configuration, when attaching or removing the cap body 9 (cap unit 1A) to the container body 2, a pair of rib walls 23 are engaged circumferentially with a pair of vertical notches 25, thereby preventing the circumferential force caused by rotation from applying stress in the direction of peeling to the joint surface between the inner underside of the outer lid 10 and the inner stopper 11, making it possible to prevent peeling between the outer lid 10 and the inner stopper 11 in the first place.

[0076] In addition, in the cap unit 1A of this embodiment, the temporary fastening mechanism 20A can only be seen from the outside during the manufacturing process, i.e., before the inner underside of the outer lid 10 and the inner plug 11 are joined, except when the cap body 9 is damaged.

[0077] Therefore, when a user uses the cap unit 1A, the temporary fastening mechanism 20A cannot be seen from the outside, so it does not affect the aesthetics of the product, and the user is not aware of the mechanism or existence of the temporary fastening mechanism 20A. Therefore, a safer product is provided, and users can use it without feeling any difference from previous products.

[0078] As described above, the capped container 100 of this embodiment is provided with the cap unit 1A of this embodiment described above, thereby making it possible to achieve greater safety and further improvements in usability.

[0079] (Second embodiment) Next, a cap unit 1B shown in FIGS. 11 and 12 will be described as a second embodiment of the present invention.

[0080] Note that Fig. 11 is a cross-sectional view of cap unit 1B taken along line AA in Fig. 1. Fig. 12 is a cross-sectional view of cap unit 1B taken along line BB in Fig. 1. In the following description, the same parts as those in cap unit 1A will not be described and will be denoted by the same reference numerals in the drawings.

[0081] As shown in FIGS. 11 and 12, the cap unit 1B of this embodiment has basically the same configuration as the cap unit 1A, except that it includes a temporary fastening mechanism 20B instead of the temporary fastening mechanism 20A.

[0082] Specifically, this temporary fastening mechanism 20B has a female screw portion 31 provided on the inside plug 11 as an engaging portion, and a male screw portion 32 provided on the outer lid 10 as an engaged portion.

[0083] The male thread portion 32 is provided so as to protrude outward from the lower end side of the outer peripheral surface of the inner peripheral wall portion 10c, while the female thread portion 31 is provided so as to protrude inward from the upper end side of the inner peripheral surface of the peripheral wall portion 11b.

[0084] In the temporary fastening mechanism 20B, the female screw portion 31 and the male screw portion 32 are screwed together by rotating the inside plug 11 about its axis relative to the lower surface of the inside of the outer lid 10. Furthermore, since no anti-rotation mechanism is provided at the end of the screw threading, by further rotating the inside plug 11, the female screw portion 31 and the male screw portion 32 will eventually pass the end of the threads, releasing the screwing, and the inside plug 11 will move downward due to gravity.

[0085] Furthermore, unless a special operation is performed such as pressing the female threaded portion 31 of the inner plug 11 downward against the male threaded portion 32 provided on the underside of the inside of the outer lid 10 and rotating it in the opposite direction to the rotation made during installation, the male threaded portion 32 will be irreversibly positioned more inside the inner plug 11 than the female threaded portion 31, and the female threaded portion 31, which is the engaging portion, will be engaged with the male threaded portion 32, which is the engaged portion.

[0086] This temporarily fastens the inner plug 11 to the lower surface of the inner side of the outer lid 10 to prevent it from falling off. Furthermore, while the inner plug 11 is in this temporarily fastened state, it is possible to move the inner plug 11 upward relative to the lower surface of the inner side of the outer lid 10, and then join the inner plug 11 to the lower surface of the inner side of the outer lid 10 to form an integrated unit.

[0087] In other words, in this temporary fastening mechanism 20B, the screw engagement between the above-mentioned female screw portion 31 and male screw portion 32 goes over the threads (the screw engagement is released), and in the positional relationship between the female screw portion 31 and the male screw portion 32, a gap is provided to move the inner plug 11 upward (in the direction of joining) relative to the inner underside of the outer lid 10.

[0088] In addition, the temporarily fastened state in this embodiment does not only refer to a state in which the female thread portion 31, which is the engaging portion, is engaged with the male thread portion 32, which is the engaged portion, as in the first embodiment, but also includes a state in which the inside plug 11 has moved upward while the female thread portion 31, which is the engaging portion, is engaged with the male thread portion 32, which is the engaged portion, as shown in Figures 11 and 12.

[0089] 11 and 12, gravity moves the inside plug 11 downward, and as a result, the inside plug 11 engages with the lower surface (external thread portion 32) of the inside of the outer lid 10. Therefore, the temporarily fastened state in this embodiment means a state in which the inside plug 11 is prevented from falling off due to gravity.

[0090] In the cap unit 1B of this embodiment having the above-described configuration, the inner stopper 11 is bonded and integrated to the inner underside of the outer lid 10 while remaining in a temporarily fixed state using the above-described temporary fixing mechanism 20B to prevent the inner stopper 11 from falling off the outer lid 10.

[0091] Therefore, in the cap unit 1B of this embodiment, even if the inner stopper 11 peels off from the inner underside of the outer lid 10 due to a defect in the joint or the like, the inner stopper 11 and the container body 2 are temporarily fastened to the outer lid 10 by the above-mentioned temporary fastening mechanism 20B, so it is possible to prevent the inner stopper 11 from falling off from the inner underside of the outer lid 10, making it possible to provide a safer product.

[0092] (Third embodiment) Next, a cap unit 1C shown in, for example, FIGS. 13 and 14 will be described as a third embodiment of the present invention.

[0093] Note that Fig. 13 is a cross-sectional view of cap unit 1C taken along line AA in Fig. 1. Fig. 14 is a cross-sectional view of cap unit 1C taken along line BB in Fig. 1. In the following description, the same parts as those in cap unit 1A will not be described and will be denoted by the same reference numerals in the drawings.

[0094] As shown in FIGS. 13 and 14, the cap unit 1C of this embodiment has basically the same configuration as the cap unit 1A, except that it includes a temporary fastening mechanism 20C instead of the temporary fastening mechanism 20A.

[0095] Specifically, this temporary fastening mechanism 20C has a pair of engaging claws 41 that serve as the engaged parts provided on the outer lid 10, an inner lower wall part 11d that is formed in an approximately cylindrical shape and rises upward from opposing positions in the center of the upper surface of the bottom wall part 11a of the inner plug 11, and a pair of engaging holes 42 that serve as the engaging parts provided in the inner lower wall part 11d.

[0096] The pair of engaging claws 41 have a constant width in the horizontal direction and a constant thickness in the vertical direction, and are provided so as to protrude inward from opposing positions on the inner peripheral surface of the inner peripheral wall portion 10c. On the other hand, the pair of engaging holes 42 are provided by cutting out opposing positions on the inner peripheral lower wall portion 11d in the vertical direction, with a width corresponding to the engaging claws 41 and larger than the thickness of the engaging claws 41.

[0097] Furthermore, the pair of engagement holes 42 serving as engagement portions are provided with a pair of other-end side wall portions 22d extending in the vertical direction from the rear of the other end, and a pair of one-end side wall portions 22e similarly extending in the vertical direction from one end side of the pair of other-end side wall portions 22d. In this embodiment, unlike the first embodiment, the pair of other-end side wall portions 22d and the pair of one-end side wall portions 22e are provided on the inside plug 11 side, but the effect thereof is similar to that of the first embodiment.

[0098] In temporary fastening mechanism 20C, the lower surfaces of paired engaging claws 41 are inclined inward and upward, and are shaped to guide engaging holes 42 from below upward. Therefore, by moving inner plug 11 upward relative to the inner lower surface of outer lid 10, inner peripheral wall portion 10c moves outward, or inner peripheral lower wall portion 11d moves inward, or both of them elastically deform in the above directions to overcome and then return to their original positions, thereby irreversibly engaging paired engaging claws 41 with paired engaging holes 42 as a so-called snap fit.

[0099] This temporarily fastens the inner plug 11 to the lower surface of the inner side of the outer lid 10 to prevent it from falling off. Furthermore, while the inner plug 11 is in this temporarily fastened state, it is possible to move the inner plug 11 upward relative to the lower surface of the inner side of the outer lid 10, and then join the inner plug 11 to the lower surface of the inner side of the outer lid 10 to form an integrated unit.

[0100] That is, in this temporary fastening mechanism 20C, when the pair of engaging claws 41 are engaged with the pair of engaging holes 42 described above, the engaging holes 42 are cut out in the vertical direction to be larger than the thickness of the engaging claws 41, so that there are gaps on the upper and lower sides of each engaging hole 42 that allow each engaging claw 41 to move until it abuts. Therefore, the positional relationship between the engaging holes 42 and the engaging claws 41 provides a gap that allows the inside plug 11 to move upward (in the joining direction) relative to the inner lower surface of the outer lid 10.

[0101] In addition, the temporarily fastened state in this embodiment does not only refer to a state in which a pair of engaging holes 42, which are engaging portions, are engaged with a pair of engaging claws 41, as in the first embodiment, but also includes a state in which the inside plug 11 has moved upward while a pair of engaging holes 42, which are engaging portions, are engaged with a pair of engaging claws 41, which are engaging portions, as shown in Figures 13 and 14.

[0102] 13 and 14, gravity moves the inside plug 11 downward, and as a result, the inside plug 11 engages with the lower surface (engagement claws 41) of the inside of the outer lid 10. Therefore, the temporarily fastened state in this embodiment means a state in which the inside plug 11 is prevented from falling off due to gravity.

[0103] In the cap unit 1C of this embodiment having the above-described configuration, the inner stopper 11 is attached by bonding to the inner underside of the outer lid 10 while remaining in a temporarily fixed state using the above-described temporary fixing mechanism 20C to prevent the inner stopper 11 from falling off the outer lid 10.

[0104] Therefore, in the cap unit 1C of this embodiment, even if the inner stopper 11 peels off from the inner underside of the outer lid 10 due to a joining defect or the like, the inner stopper 11 and the container body 2 are temporarily fastened to the outer lid 10 by the above-mentioned temporary fastening mechanism 20C, so it is possible to prevent the inner stopper 11 from falling off from the inner underside of the outer lid 10, making it possible to provide a safer product.

[0105] 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, 1B, and 1C are configured such that the male thread portion 14 of the inside plug 11 is attached by screwing to the female thread portion 6 of the container body 2. However, the cap units 1A, 1B, and 1C may be configured such that the male thread portion provided on the outer peripheral surface of the neck portion 2e (of the container body 2) is attached by screwing to the female thread portion provided on the inner peripheral surface of the outer peripheral wall portion 10a (outer lid 10).

[0106] Furthermore, although the cap units 1A, 1B, and 1C are configured to be detachably attached to the neck portion 2e of the container body 2 by screwing, the configuration is not necessarily limited to this. For example, they may be configured to be detachably attached to a shoulder member attached to the neck portion 2e of the container body 2 by screwing.

[0107] Furthermore, the cap units 1A, 1B, and 1C may be configured such that the configurations of the engaging portion of the inner plug 11 and the engaged portion of the outer lid 10 are interchanged. For example, in the cap unit 1A, the protrusion 21a may be provided on the outer lid 10 side, and the slit 22a may be provided on the inner plug 11 side.

[0108] Similarly, in cap unit 1B, the female thread portion 31 may be provided on the outer lid 10 side and the male thread portion 32 on the inner plug 11 side. Similarly, in cap unit 1C, the engagement hole 42 may be provided on the outer lid 10 side and the engagement claw 41 on the inner plug 11 side.

[0109] In the above embodiment, the present invention is exemplified as being applied to a beverage container that has a heat / cold insulation function due to the container body 2 having the above-mentioned vacuum insulation structure, but the present invention can be widely applied to a capped container that has a container body and a cap unit that can be attached and detached to the container body. [Explanation of symbols]

[0110] DESCRIPTION OF SYMBOLS 1A, 1B, 1C... Cap unit 2... Container body 2a... Upper opening 3... Outer container 4... Inner container 5... Vacuum insulation layer 6... Female thread portion 7... Protruding portion 9... Cap body 10... Outer lid 11... Inner plug 12... Handle portion 14... Male thread portion 15... Watertight packing 20A, 20B, 20C... Temporary fastening mechanism 21... Engaging portion 22... Engaged portion 31... Female thread portion (engaging portion) 32... Male thread portion (engaged portion) 41... Engaging claw (engaged portion) 42... Engaging hole (engaging portion) 100... Container with cap

Claims

1. A cap unit that can be detachably attached to a container body having an open top, a cap body that closes an upper opening of the container body, The cap body includes an outer lid that covers an upper opening of the container body; an inside plug fitted into the container body from the upper opening; a temporary fastening mechanism that temporarily fastens the inner plug to the inner lower surface of the outer lid to prevent the inner plug from falling off, A cap unit characterized in that the inner plug is joined integrally to the inner underside of the outer lid while the inner plug is temporarily fastened to the outer lid by the temporary fastening mechanism.

2. The cap unit described in claim 1, characterized in that the temporary fastening mechanism has an engaging portion provided on either the outer lid or the inner plug, and an engaged portion provided on the other, and when the engaging portion engages with the engaged portion, the inner plug is temporarily fastened to the inner underside of the outer lid.

3. The cap unit described in claim 2, characterized in that, in the positional relationship between the engaged portion and the engaging portion when the engaging portion is engaged with the engaged portion, a gap is provided to allow the inner plug to move in the direction of joining to the inner underside of the outer lid.

4. The cap unit according to claim 2, characterized in that the temporary fastening mechanism engages the engaging portion with the engaged portion by rotating the inner plug around an axis relative to the inner underside of the outer lid.

5. The 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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