Cap unit and container with cap

Abstract

To provide a cap unit capable of easily and safely opening while preventing a pressure in a container body from rising.SOLUTION: A cap unit 1A attached to a container body 2A having an opened top comprises: an outside cap 8 covering an upper opening part 2d of the container body 2A; an inside cap 9 fitted to the inside of the container body 2A from the upper opening part 2d of the container body 2A; and a water stop packing 10 which is positioned at an outer peripheral part of the inside cap 9 to seal a space between the inside of the container body 2A and the inside cap 9. The water stop packing 10 is composed of a ring-shaped elastic seal member abutting on an overhanging part 7 protruded from the inside of the container body 2A over the whole circumference, and is attached to the inside cap 9 in a state of being fitted to a ring-shaped groove part 15 provided at the outer peripheral part of the inside cap 9. A pressure release part 20, for releasing a pressure in the container body 2A when the pressure in the container body 2A rises up to a prescribed pressure, is provided at the outer peripheral part of the inside cap 9.SELECTED DRAWING: Figure 1

Description

[Technical field]

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

[0002] Conventionally, there have been capped containers equipped with a cap unit (plug) that is attached to the mouth and neck of a container body with an open top to close the top opening of the container body. There are also capped containers that have a heat retention or cold retention function due to the container body having a vacuum insulation structure. For example, such capped containers employ a structure in which an upper opening of the container body is sealed using an inner lid and an outer lid (for example, see Patent Documents 1 and 2).

[0003] Specifically, the capped containers described in Patent Documents 1 and 2 below include an inner lid that is fitted inside the container body from the upper opening of the container body to close the opening, a waterproof gasket that is attached to the inner lid to seal the gap between the container body and the inner lid, and an outer lid that is detachably attached to the container body by screwing it in a state where it covers the upper opening of the container body from the outside. The outer lid abuts against the inner lid when attached to the container body, thereby restricting the inner lid from moving upward. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 5494717 [Patent Document 2] Patent No. 5841220 Summary of the Invention [Problem to be solved by the invention]

[0005] In the conventional capped container described above, for example, when high-temperature contents are placed inside the container body or when the contents inside the container body spoil and gas is generated, the pressure inside the container body sealed by the inner and outer lids rises (becomes positive pressure), and the inner lid is pressed against the outer lid.

[0006] At this time, the tightening force between the container body and the outer lid increases, making it difficult to turn the outer lid in the direction to remove it (opening the cap).In addition, when removing (opening) the outer lid, the pressure inside the container body is released forcefully, which can cause a loud noise or the inner lid to fly upward.

[0007] The present invention has been proposed in consideration of the above-mentioned conventional circumstances, and aims to provide a cap unit that allows for easy and safe opening while preventing an increase in pressure inside the container body, and a capped container that, by being equipped with such a cap unit, allows for further improved 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 is attached to a container body having an open top, an outer lid for covering an upper opening of the container body; an inner lid that is fitted into the inside of the container body from an upper opening of the container body; a waterproof packing located on the outer periphery of the inner lid to seal the gap between the inside of the container body and the inner lid; The watertight gasket is made of a ring-shaped elastic seal member that is in contact with a protruding portion that protrudes from the inside of the container body over the entire circumference, The inner lid is attached to the inner lid in a state where the inner lid is fitted into a ring-shaped groove provided on an outer periphery of the inner lid, A pressure release portion is provided on the outer periphery of the inner lid to release the pressure inside the container body when the pressure inside the container body rises to a predetermined pressure.、 the pressure release portion has a recess or a notch that communicates with the inside of the container body via the groove, The recess or cutout portion is provided by recessing or cutting out at least a part of an upper side surface forming the groove portion, When the elastic seal member is fitted into the groove, the elastic seal member separates the groove from the recess or the notch, When the pressure inside the container body rises to a predetermined level, the elastic seal member elastically deforms, and the groove and the recess or notch are brought into communication with each other, so that the pressure inside the container body is released to the outside through the recess or notch. A cap unit characterized by: [2] A cap unit that is attached to a container body having an open top, An outer lid for covering the outside of the container body; an inner plug located at a central portion of the inner side of the outer lid and fitted into the inner side of the container body from an upper opening of the container body; a watertight gasket located on the outer periphery of the inside plug to seal the gap between the inside of the container body and the inside plug; The watertight gasket is made of a ring-shaped elastic seal member that is in contact with a protruding portion that protrudes from the inside of the container body over the entire circumference, The inner plug is attached to the inner plug in a state where the inner plug is fitted into a ring-shaped groove provided on an outer periphery of the inner plug, A pressure release portion is provided on the outer periphery of the inside plug, which releases the pressure inside the container body when the pressure inside the container body rises to a predetermined pressure. 、 the pressure release portion has a recess or a notch that communicates with the inside of the container body via the groove, The recess or cutout portion is provided by recessing or cutting out at least a part of an upper side surface forming the groove portion, When the elastic seal member is fitted into the groove, the elastic seal member separates the groove from the recess or the notch, When the pressure inside the container body rises to a predetermined level, the elastic seal member elastically deforms, and the groove and the recess or notch are brought into communication with each other, so that the pressure inside the container body is released to the outside through the recess or notch. A cap unit characterized by: [3] A cap unit that is attached to a container body having an open top, a cap body attached to the mouth and neck portion of the container body and having a liquid passage hole communicating with the inside of the container body; a cover body that is detachably attached to the cap body by screwing and that opens and closes the liquid passage hole, The cap body has an inner tube portion that is fitted into the inside of the container body from an upper opening of the container body; a waterproof packing located on the outer periphery of the inner cylindrical portion to seal the gap between the inside of the container body and the inner cylindrical portion, The watertight gasket is made of a ring-shaped elastic seal member that is in contact with a protruding portion that protrudes from the inside of the container body over the entire circumference, The inner cylindrical portion is attached to the inner cylindrical portion in a state where the inner cylindrical portion is fitted into a ring-shaped groove provided on an outer periphery of the inner cylindrical portion, The lid body includes an outer lid that covers the outside of the cap body, and an inner plug located at a center portion of the inner side of the outer lid and fitted inside the cap body to close the liquid passage hole; a lid packing located on an outer periphery of the inside plug to seal the gap between the inside of the cap body and the inside plug, The lid packing is made of a ring-shaped elastic seal member that is in contact with the inner circumferential surface of the cap body over the entire circumference, The inner plug is attached to the inner plug in a state where the inner plug is fitted into a ring-shaped groove provided on an outer periphery of the inner plug, At least one of the inner cylinder and the inside plug is provided on an outer periphery thereof with a pressure release portion that releases pressure within the container body when the pressure within the container body rises to a predetermined pressure. 、 the pressure release portion has a recess or a notch that communicates with the inside of the container body via the groove, The recess or cutout portion is provided by recessing or cutting out at least a part of an upper side surface forming the groove portion, When the elastic seal member is fitted into the groove, the elastic seal member separates the groove from the recess or the notch, When the pressure inside the container body rises to a predetermined level, the elastic seal member elastically deforms, and the groove and the recess or notch are brought into communication with each other, so that the pressure inside the container body is released to the outside through the recess or notch. A cap unit characterized by 。 [ 4 The recesses or notches are arranged at equal intervals in the circumferential direction of the groove. Any one of [1] to [3] The cap unit according to claim 1. [ 5 The above [1] to [ 4 and a cap unit according to any one of the above items (1) to (4). A capped container comprising: a container body to which the cap unit is attached. [ 6 The container body has a vacuum insulation structure. 5 A container with a cap as described in (1). Effect of the Invention

[0009] As described above, according to the present invention, it is possible to provide a cap unit that allows for easy and safe opening while preventing an increase in pressure inside the container body, and a capped container that, by being equipped with such a cap unit, allows for further improved usability. [Brief description of the drawings]

[0010] [Figure 1] 1 is a cross-sectional view showing a configuration of a capped container equipped with a cap unit according to a first embodiment of the present invention. [Diagram 2] 2 is an exploded perspective view of the cap unit and the container body shown in FIG. 1, viewed from below. [Diagram 3] 2 is a side view showing the configuration of an inner lid provided in the cap unit shown in FIG. 1. [Figure 4] 6 is a cross-sectional view showing the configuration of a capped container equipped with a cap unit according to a second embodiment of the present invention. FIG. [Diagram 5] 5 is an exploded perspective view of the cap unit and the container body shown in FIG. 4, viewed from below. [Figure 6] 5 is a side view showing the configuration of the cap unit shown in FIG. 4. [Figure 7] 11 is a cross-sectional view showing the configuration of a capped container equipped with a cap unit according to a third embodiment of the present invention. FIG. [Figure 8] 8 is an exploded perspective view of the cap unit and the container body shown in FIG. 7, viewed from below. [Figure 9] 8 is an exploded perspective view of a cap body and a waterproof gasket included in the cap unit shown in FIG. 7, viewed from below. [Figure 10] 10 is a side view showing the configuration of the cap body shown in FIG. 9. [Figure 11] 8 is an exploded perspective view of a lid body and a lid gasket included in the cap unit shown in FIG. 7, viewed from below. [Figure 12] 12 is a side view showing the configuration of the lid shown in FIG. 11. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, an embodiment 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 including a cap unit 1A shown in, for example, FIGS. 1 to 3 will be described.

[0012] Fig. 1 is a cross-sectional view showing the configuration of a capped container 100A equipped with a cap unit 1A. Fig. 2 is an exploded perspective view of the cap unit 1A and a container body 2A viewed from below. Fig. 3 is a side view showing the configuration of an inner lid equipped in the cap unit 1A.

[0013] As shown in FIGS. 1 and 2, a capped container 100A of this embodiment includes a cap unit 1A of this embodiment and a container body 2A to which the cap unit 1A is detachably attached.

[0014] The capped container 100A is a soup jar (beverage container) capable of keeping a beverage (contents) contained in the container body 2A warm by the container body 2A having a vacuum insulation structure.

[0015] Specifically, the container body 2A has a bottomed cylindrical outer container 3 and an inner container 4 made of, for example, stainless steel, and is configured as a double-structure container in which the mouths of the two containers are joined together with the inner container 4 housed inside the outer container 3.

[0016] In addition, a vacuum insulation layer 5 is provided between the outer container 3 and the inner container 4. The vacuum insulation layer 5 can be formed, for example, by blocking a vent hole provided in the center of the bottom surface of the outer container 3 in a chamber that has been depressurized (evacuated) to a high vacuum.

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

[0018] Also, the inner peripheral surface of the mouth / neck portion 2c (inner container 4) is provided with a female screw portion 6. Furthermore, below the female screw portion 6, a ring-shaped protruding portion 7 is provided protruding from the inner peripheral surface of the inner container 4 (container body 2A) over the entire circumference.

[0019] Although the container body 2A has a generally cylindrical external shape as a whole, the external shape of the container body 2A is not particularly limited and can be appropriately changed according to the size, design, etc. In addition, the outer peripheral surface of the container body 2A may be painted, printed, etc.

[0020] As shown in Figures 1 to 3, the cap unit 1A of this embodiment has an outer lid 8 covering the upper opening 2d of the container body 2A, an inner lid 9 fitted into the inside of the container body 2A from the upper opening 2d, a water-stop gasket 10 located on the outer periphery of the inner lid 9 and sealing the space between the inside of the container body 2A and the inner lid 9, an inner stopper 11 located in the center of the inside of the outer lid 8 and fitted into the inside of the inner lid 9, and a stopper body 13 located in the center of the bottom surface of the inner stopper 11 and blocking an air vent 12 provided in the center of the bottom surface of the inner lid 9.

[0021] The outer lid 8 is made of a heat-resistant resin such as polypropylene, and has a peripheral wall portion 8a formed in an approximately cylindrical shape to match the outer diameter of the trunk portion 2b of the container body 2A, and an upper wall portion 8b that closes the upper portion of the peripheral wall portion 8a.

[0022] The inner lid 9 is made of a heat-resistant resin such as polypropylene, and has a substantially circular bottom wall 9a and a substantially cylindrical peripheral wall 9b standing from the outer periphery of the bottom wall 9a. A ring-shaped upper flange 9c is provided on the upper end side of the outer periphery of the peripheral wall 9b so as to protrude around the entire periphery.

[0023] The outer peripheral surface of the peripheral wall portion 9b (inner lid 9) is provided with a male screw portion 14 that screws into the female screw portion 6 on the container body 2A side. In the cap unit 1A, the inner lid 9 is detachably attached to the container body 2A by screwing the female screw portion 6 into the male screw portion 14.

[0024] 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 inner lid 9 can be attached to and detached from the container body 2A with a small rotation operation (about 180° in this embodiment).

[0025] The watertight packing 10 is made of a ring-shaped elastic seal member such as heat-resistant rubber or elastomer, for example, silicone rubber. The watertight packing 10 is detachably attached to the inner lid 9 in a state where it is fitted into a ring-shaped groove 15 provided on the outer periphery of the inner lid 9.

[0026] On the other hand, the watertight gasket 10 can be removed from the inner lid 9 by elastically deforming (pulling and stretching) itself. This allows the inner lid 9 and the watertight gasket 10 to be washed separately, and the space between the inner lid 9 and the watertight gasket 10 can be kept hygienic.

[0027] In addition, an elastic flange portion 10a is provided on the outer periphery of the watertight gasket 10. The elastic flange portion 10a has a shape that protrudes around the entire circumference while curving downward from the upper end of the outer periphery of the watertight gasket 10.

[0028] When the inner lid 9 is fitted inside the container body 2A, the elastic flange portion 10a of the watertight gasket 10 elastically deforms and comes into contact with the protruding portion 7 of the container body 2A, so that the watertight gasket 10 is in close contact with the protruding portion 7 all around. This allows the watertight gasket 10 to seal (watertightly seal) the gap between the inside of the container body 2A and the inner lid 9.

[0029] The inner plug 11 is made of a heat-resistant resin such as polypropylene, has a generally cylindrical shape with a bottom, and is attached to the center of the lower surface of the upper wall portion 8b (outer lid 8) by welding or the like. A heat insulating material 16 made of, for example, urethane foam resin or the like is disposed inside the inner plug 11 as a heat insulating layer. Instead of the heat insulating material 16 described above, air (void) may be used as the heat insulating layer.

[0030] An elastic click portion 17 is provided on the upper portion of the peripheral wall portion 9b (inner lid 9) by cutting out a portion of the peripheral wall portion 9b in the vertical direction. Meanwhile, a fitting groove 18 for fitting the inner lid 9 is provided on the outer peripheral surface of the inside plug 11. In the cap unit 1A, when the inner lid 9 is fitted into the outer lid 8, the elastic click portion 17 is elastically deformed to fit into the fitting groove 18, so that the inner lid 9 is detachably attached to the inside plug 11.

[0031] The inner lid 9 is provided with a circular vent hole 12 penetrating the center of the bottom wall 9a. Meanwhile, the inside plug 11 is provided with a plug body 13 at the center of the bottom surface thereof for closing the vent hole 12.

[0032] The plug 13 is made of an elastic material such as heat-resistant rubber or elastomer, for example silicone rubber. The plug 13 has a protrusion 13a that bulges out in a dome shape from its center, a flange 13b that extends in a radially expanding direction from the periphery of the protrusion 13a, a cylindrical portion 13c that protrudes cylindrically from the opposite side to the protrusion 13a, and a ring-shaped groove 13d that cuts out the outer circumferential surface of the cylindrical portion 13c.

[0033] Meanwhile, the inside plug 11 has a fitting recess 11a in the center of its bottom surface into which the cylindrical portion 13c fits, and a fitting protrusion 11b that protrudes from the inner circumferential surface of the fitting recess 11a and fits into the groove portion 13d. As a result, the plug 13 is detachably attached to the center of the bottom surface of the inside plug 11.

[0034] In the cap unit 1A, when the inner lid 9 is attached to the inside plug 11 by screwing, the protrusion 13a of the plug body 13 elastically deforms and comes into contact with the periphery of the air hole 12, thereby blocking the air hole 12. In addition, in the cap unit 1A, the plug body 13 can be removed from the inside plug 11 and the inside plug 11 and the plug body 13 can be washed separately, so that the space between the inside plug 11 and the plug body 13 can be kept hygienic.

[0035] Incidentally, in the cap unit 1A of this embodiment, a pressure release portion 20 is provided on the outer periphery of the inner lid 9, which releases the pressure inside the container body 2A when the pressure inside the container body 2A rises to a predetermined level.

[0036] Examples of cases in which the pressure inside the container body 2A increases (becomes positive pressure) include when high-temperature contents are placed inside the container body 2A, or when the contents inside the container body 2A decompose and gas is generated.

[0037] The pressure release section 20 has a recess or cutout section (cutout section in this embodiment) 20a that communicates with the inside of the container body 2A via the groove section 15. Specifically, this cutout section 20a is provided so as to cut out at least a part of the upper side surface that forms the groove section 15 of the outer periphery of the inner lid 9.

[0038] The number of cutouts 20a may be one or more. When a plurality of cutouts 20a are provided, they are preferably arranged at equal intervals in the circumferential direction of groove portion 15. Moreover, the width of cutouts 20a in the circumferential direction is preferably set within an angle range of 60° or less, since if the width is too wide, it may cause leakage.

[0039] In the cap unit 1A of this embodiment, when the waterproof gasket 10 is fitted into the groove 15, the waterproof gasket 10 blocks the gap between the groove 15 and the notch 20a. Also, the gap between the inside of the container body 2A and the inner lid 9 is sealed (watertight) by the waterproof gasket 10.

[0040] When the pressure inside the container body 2A rises from this state to a predetermined value (for example, 200 kPa or more and 800 kPa or less), the watertight gasket 10 elastically deforms, and the groove 15 and the notch 20a communicate with each other. This allows the pressure inside the container body 2A to be released to the outside through the notch 20a.

[0041] When a plurality of cutouts 20a are provided, the set value of the pressure at which the waterstop gasket 10 elastically deforms can be adjusted by varying the circumferential width of each cutout.

[0042] On the other hand, after the pressure inside the container body 2A is released, the waterproof packing 10 elastically returns to its original position, blocking the gap between the groove 15 and the notch 20a. As a result, the gap between the inside of the container body 2A and the inner lid 9 is again sealed (watertight).

[0043] Therefore, in a capped container 100A equipped with the cap unit 1A of this embodiment, as the pressure inside the container body 2A increases, the fastening force between the female thread portion 6 on the container body 2A side and the male thread portion 14 on the inner lid 9 side increases, and the outer lid 8 does not become difficult to turn in the opening direction, and the cap unit 1A can be easily removed from the container body 2A.

[0044] Furthermore, in the capped container 100A of this embodiment, when removing the cap unit 1A from the container body 2A, it is possible to prevent the cap unit 1A from jumping out upward due to increased pressure within the container body 2A.

[0045] As described above, in the capped container 100A of this embodiment, the cap unit 1A can be easily and safely opened while preventing an increase in pressure inside the container body 2A. In addition, it is possible to improve the operability when opening the cap unit 1A while maintaining good sealing performance provided by the watertight gasket 10. Therefore, the capped container 100A including such a cap unit 1A can be further improved in usability.

[0046] In addition, in the cap unit 1A of this embodiment, the inner lid 9 is configured to be freely attached and detached to the above-mentioned container body 2A by screwing, but it is also possible to configure the outer lid 8 to be freely attached and detached to the container body 2A by screwing.

[0047] 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. 4 to 6 will be described.

[0048] Fig. 4 is a cross-sectional view showing the configuration of a capped container 100B equipped with a cap unit 1B. Fig. 5 is an exploded perspective view of the cap unit 1B and container body 2B viewed from below. Fig. 6 is a side view showing the configuration of the cap unit 1B. In the following explanation, the same parts as those of the cap unit 1A and container body 2A will not be described and will be given the same reference numerals in the drawings.

[0049] As shown in FIGS. 4 and 5, a capped container 100B of this embodiment includes a cap unit 1B of this embodiment and a container body 2B to which the cap unit 1B is detachably attached.

[0050] The capped container 100B is a tumbler (beverage container) capable of keeping a hot beverage (contents) contained in the container body 2B warm by the container body 2B having a vacuum insulation structure.

[0051] Specifically, this container body 2B has basically the same structure as the container body 2A, except that it has a longer body than the container body 2A and has a shape that gradually expands in diameter toward the top.

[0052] The cap unit 1B of this embodiment constitutes a plug for closing the upper opening 2d of the container body 2B, as shown in Figures 4 to 6. Specifically, this cap unit 1B includes a cap body 30 that is attached to the container body 2B by screwing in a state in which the cap unit 1B covers the upper opening 2d of the container body 2B.

[0053] The cap body 30 has an outer lid 31 that covers the upper opening 2d of the container body 2B, an inner stopper 32 that is located in the center of the inside of the outer lid 31 and fitted into the inside of the container body 2B from the upper opening 2d, and a watertight gasket 33 that is located on the outer periphery of the inner stopper 32 and seals the space between the inside of the container body 2B and the inner stopper 32.

[0054] The outer lid 31 is made of a heat-resistant resin such as polypropylene or Tritan (registered trademark), and has a peripheral wall portion 31a formed in an approximately cylindrical shape so that the appearance is continuous with the trunk portion 2b of the container body 2B, and an upper wall portion 31b that closes the upper portion of the peripheral wall portion 30a.

[0055] The inside plug 32 is made of a heat-resistant resin such as polypropylene or Tritan (registered trademark), and has a substantially circular bottom wall portion 32a and a substantially cylindrical peripheral wall portion 32b that rises from the periphery of the bottom wall portion 32a.

[0056] The inner plug 32 is located at the center of the inside of the outer lid 31, and the peripheral wall portion 32b is attached integrally to the center of the lower surface of the upper wall portion 31b by welding or the like. Note that the inside of the inner plug 32 is not limited to the configuration in which the above-mentioned heat insulating material 16 is arranged, and may be configured to have air (a gap) that serves as a heat insulating layer.

[0057] Further, an external thread portion 34 that screws into the internal thread portion 6 on the container body 2B side is provided on the outer peripheral surface of the peripheral wall portion 32b (inner plug 32). In the cap unit 1B, the internal thread portion 32 (cap body 30) is detachably attached to the container body 2B by screwing the internal thread portion 6 into the external thread portion 34.

[0058] The female screw portion 6 and the male screw portion 34 are double-threaded threads that are complementary to each other. When a double-threaded thread is used, the cap body 30 can be attached to and detached from the container body 2B with a small rotation operation (about 180° in this embodiment).

[0059] The watertight packing 33 is made of a ring-shaped elastic seal member such as heat-resistant rubber or elastomer, for example, silicone rubber. The watertight packing 33 is detachably attached to the inner plug 32 in a state where it is fitted into a ring-shaped groove 35 provided on the outer periphery of the inner plug 32.

[0060] On the other hand, the water stop gasket 33 can be removed from the inner plug 32 by elastically deforming (pulling and stretching) itself. This allows the inner plug 32 and the water stop gasket 33 to be washed separately, and the space between the inner plug 32 and the water stop gasket 33 can be kept hygienic.

[0061] Furthermore, a plurality of elastic flange portions 33a (two in this embodiment) arranged in the vertical direction are provided on the outer periphery of the watertight packing 33. The elastic flange portions 33a have a shape that protrudes from the outer periphery of the watertight packing 33 in the radially expanding direction over the entire circumference.

[0062] When the inner plug 32 is fitted inside the container body 2B, the elastic flange portion 33a of the watertight gasket 33 elastically deforms and comes into contact with the protruding portion 7 of the container body 2B, so that the watertight gasket 33 is in close contact with the protruding portion 7 all around. This makes it possible for the watertight gasket 33 to seal (stop water) the gap between the inside of the container body 2B and the inner plug 32.

[0063] Incidentally, in the cap unit 1B of this embodiment, a pressure release portion 40 is provided on the outer periphery of the inside plug 32, which releases the pressure inside the container body 2B when the pressure inside the container body 2B rises to a predetermined level.

[0064] The pressure release section 40 has a recess or cutout section (recess in this embodiment) 40a that communicates with the inside of the container body 2B via the groove section 35. Specifically, this recess 40a is provided so as to recess at least a part of the upper side surface that forms the groove section 35 among the outer periphery of the inside plug 32.

[0065] The number of recesses 40a may be one or more. When multiple recesses 40a are provided, they are preferably arranged at equal intervals in the circumferential direction of the groove portion 35. In addition, the width of the recesses 40a in the circumferential direction is preferably set within an angle range of 60° or less, since if the width is too wide, it may cause leakage.

[0066] In the cap unit 1B of this embodiment, when the waterproof gasket 33 is fitted into the groove 35, the waterproof gasket 33 blocks the gap between the groove 35 and the recess 40a. In addition, the gap between the inside of the container body 2B and the inside plug 32 is sealed (watertight) by the waterproof gasket 33.

[0067] When the pressure inside the container body 2B rises from this state to a predetermined value (for example, 200 kPa or more and 800 kPa or less), the waterproof gasket 33 elastically deforms, and the groove 35 and the recess 40a communicate with each other. This allows the pressure inside the container body 2B to be released from the recess 40a to the outside.

[0068] When a plurality of recesses 40a are provided, the set value of the pressure at which the watertight gasket 33 elastically deforms can be adjusted by varying the circumferential width of each recess.

[0069] On the other hand, after the pressure inside the container body 2B is released, the waterproof packing 33 elastically returns to its original position, blocking the gap between the groove 35 and the recess 40a. As a result, the gap between the inside of the container body 2B and the inside plug 32 is again sealed (watertight).

[0070] Therefore, in a capped container 100B equipped with the cap unit 1B of this embodiment, as the pressure inside the container body 2B increases, the fastening force due to the screwing between the female thread portion 6 on the container body 2B side and the male thread portion 34 on the inner stopper 32 side increases, so that the outer lid 31 does not become difficult to turn in the opening direction, and the cap body 30 (cap unit 1B) can be easily removed from the container body 2B.

[0071] Furthermore, in the capped container 100B of this embodiment, when removing the cap body 30 (cap unit 1B) from the container body 2B, it is possible to prevent the cap body 30 (cap unit 1B) from flying upward due to increased pressure within the container body 2B.

[0072] As described above, in the capped container 100B of this embodiment, the cap body 30 (cap unit 1B) can be easily and safely opened while preventing an increase in pressure inside the container body 2B. In addition, it is possible to improve the operability when opening the cap body 30 (cap unit 1B) while maintaining good sealing performance provided by the watertight packing 33. Therefore, the capped container 100B including such a cap unit 1B can be further improved in usability.

[0073] In addition, in the cap unit 1B of this embodiment, the inner stopper 32 is configured to be freely attached and detached to the above-mentioned container body 2B by screwing, but it is also possible to configure the outer lid 31 to be freely attached and detached to the container body 2B by screwing.

[0074] (Third embodiment) Next, as a third embodiment of the present invention, a capped container 100C including a cap unit 1C shown in, for example, FIGS. 7 to 12 will be described.

[0075] FIG. 7 is a cross-sectional view showing the configuration of a capped container 100C equipped with a cap unit 1C. FIG. 8 is an exploded perspective view of the cap unit 1C and container body 2C viewed from below. FIG. 9 is an exploded perspective view of the cap body 51 and watertight gasket 55 provided in the cap unit 1C viewed from below. FIG. 10 is a side view showing the configuration of the cap body 51. FIG. 11 is an exploded perspective view showing the configuration of the lid body 52 provided in the cap unit 1C and the lid gasket 60 viewed from below. FIG. 12 is a side view showing the configuration of the lid body 52. In the following description, the same parts as those in the cap unit 1A and the container body 2A will not be described and will be denoted by the same reference numerals in the drawings.

[0076] As shown in FIGS. 7 and 8, a capped container 100C of this embodiment includes a cap unit 1C of this embodiment and a container body 2C to which the cap unit 1C is detachably attached.

[0077] The capped container 100C is a mug bottle (beverage container) capable of keeping a hot beverage (contents) contained in the container body 2C warm by the container body 2C having a vacuum insulation structure.

[0078] Specifically, this container body 2C has basically the same configuration as the container body 2A, except that it has a longer body shape than the container body 2A.

[0079] The cap unit 1C of this embodiment is attached to the mouth neck portion 2c of the container body 2C and comprises a cap body 51 having a liquid passage hole 50 that communicates with the inside of the container body 2C, and a lid body 52 that is attached to the cap body 51 by screwing so as to be freely attached and detached, and opens and closes the liquid passage hole 50.

[0080] As shown in Figures 7 to 10, the cap body 51 has an outer tube portion 53 that is fitted into the mouth neck portion 2c of the container body 2C, an inner tube portion 54 that is fitted into the inside of the container body 2C from the upper opening 2d, and a waterproof gasket 55 that is located on the outer periphery of the inner tube portion 54 and seals the space between the inside of the container body 2C and the inner tube portion.

[0081] The cap body 51 is formed by integrating a cylindrical outer cylinder portion 53 and an inner cylinder portion 54 made of a heat-resistant resin such as polypropylene (PP). The cap body 51 may be formed by integrally forming the outer cylinder portion 53 and the inner cylinder portion 54. For the outer cylinder portion 53, in addition to the above-mentioned PP, a thermoplastic resin such as acrylonitrile butadiene styrene (ABS) can also be used.

[0082] The fluid passage hole 50 is provided in a state penetrating the inside of the inner cylindrical portion 54. The fluid passage hole 50 has a tapered hole portion 50a whose diameter gradually decreases downward from the upper end of the inner cylindrical portion 54, a first straight hole portion 50b whose diameter is constant downward from the lower end of the tapered hole portion 50a, a step portion 50c at the lower end of the first straight hole portion 50b whose diameter is smaller than that of the first straight hole portion 50b, and a second straight hole portion 50d whose diameter is constant downward from the step portion 50c.

[0083] An external thread portion 56 that screws into the internal thread portion 6 of the container body 2C is provided on the outer circumferential surface of the inner cylinder portion 54. In the cap unit 1C, the internal thread portion 6 and the external thread portion 56 are screwed into each other, so that the inner cylinder portion 54 (cap body 51) is detachably attached to the container body 2C.

[0084] The waterproof packing 55 is made of a ring-shaped elastic seal member such as heat-resistant rubber or elastomer, for example, silicone rubber. The waterproof packing 55 is detachably attached to the inner cylindrical portion 54 in a state where it is fitted into a ring-shaped groove portion 57 provided on the outer periphery of the inner cylindrical portion 54.

[0085] On the other hand, the watertight gasket 55 can be removed from the inner tubular portion 54 by elastically deforming (pulling and stretching) itself. This allows the inner tubular portion 54 and the watertight gasket 55 to be washed separately, and the space between the inner tubular portion 54 and the watertight gasket 55 can be kept hygienic.

[0086] Moreover, at least one elastic flange portion 55a (two in this embodiment) is provided on the outer periphery of the watertight packing 55. The elastic flange portion 55a has a shape that protrudes from the outer periphery of the watertight packing 55 in the radially expanding direction over the entire circumference.

[0087] When the inner cylinder portion 54 is fitted inside the container body 2C, the elastic flange portion 55a of the watertight packing 55 elastically deforms and comes into contact with the protruding portion 7 of the container body 2C, so that the watertight packing 55 is in close contact with the protruding portion 7 all around. This makes it possible for the watertight packing 55 to seal (watertightly seal) the gap between the inside of the container body 2C and the inner cylinder portion 54.

[0088] As shown in Figures 7, 8, 11 and 12, the lid body 52 has an outer lid 58 that covers the outside of the cap body 51, an inner stopper 59 that is located in the center of the inner side of the outer lid 58 and blocks the liquid passage hole 50 when fitted inside the cap body 51, and a lid gasket 60 that is located on the outer periphery of the inner stopper 59 and seals the space between the inner side of the cap body 51 and the inner stopper 59.

[0089] The outer lid 58 is made of a heat-resistant resin such as polypropylene or Tritan (registered trademark), and has a peripheral wall portion 58a formed in an approximately cylindrical shape to match the outer diameter of the outer tube portion 53, and an upper wall portion 58b that closes the upper portion of the peripheral wall portion 58a.

[0090] The inner plug 59 is made of a heat-resistant resin such as polypropylene or Tritan (registered trademark), and has a substantially circular bottom wall portion 59a and a substantially cylindrical peripheral wall portion 59b that rises from the periphery of the bottom wall portion 59a.

[0091] The inner plug 59 is located at the center of the inside of the outer lid 58, and the peripheral wall portion 59b is attached integrally to the center of the lower surface of the upper wall portion 58b by welding or the like. A heat insulating material 61 made of, for example, urethane foam resin or the like is arranged as a heat insulating layer inside the inner plug 59. Also, the heat insulating layer may be air (space) instead of the above-mentioned heat insulating material 61.

[0092] A female thread portion 62 is provided on the inner peripheral surface of the inner cylinder portion 54. The female thread portion 62 is provided at a position where the second straight hole portion 50d of the inner cylinder portion 54 is formed. Meanwhile, a male thread portion 63 that screws into the female thread portion 62 is provided on the outer peripheral surface of the inside plug 59. In the cap unit 1C, the inside plug 59 (lid body 52) is detachably attached to the inner cylinder portion 54 (cap body 51) by screwing the female thread portion 62 into the male thread portion 63.

[0093] The female screw portion 62 and the male screw portion 63 are double-threaded screws that are complementary to each other. When a double-threaded screw is used, the lid body 52 can be attached to and detached from the cap body 51 with a small rotation operation (about 180° in this embodiment).

[0094] Lid gasket 60 is made of a ring-shaped elastic seal member made of heat-resistant rubber, elastomer, etc., such as silicone rubber. Lid gasket 60 is detachably attached to inner plug 59 in a state where it is fitted into a ring-shaped groove 64 provided on the outer periphery of inner plug 59.

[0095] On the other hand, the lid gasket 60 can be removed from the inner plug 59 by elastically deforming (pulling and stretching) itself. This allows the inner plug 59 and the lid gasket 60 to be washed separately, and the space between the inner plug 59 and the lid gasket 60 can be kept hygienic.

[0096] In addition, a plurality of elastic flange portions 60a arranged in the vertical direction are provided on the outer periphery of the lid packing 60. The elastic flange portions 60a have a shape that protrudes from the outer periphery of the lid packing 60 in the radially expanding direction over the entire circumference.

[0097] When the inside plug 59 is fitted inside the inner tube portion 54 (cap body 51), the elastic flange portion 60a of the lid gasket 60 elastically deforms and comes into contact with the inner peripheral surface of the cap body 51, so that the lid gasket 60 is in close contact with the inner peripheral surface of the cap body 51 all around. It is also preferable that the elastic flange portion 60a comes into contact with the first straight hole portion 50b near the boundary between the tapered hole portion 50a and the first straight hole portion 50b. This allows the lid gasket 60 to seal (watertightly seal) the space between the inside of the cap body 51 and the inside plug 59.

[0098] In the cap unit 1C of this embodiment, a pressure release portion 70 is provided on the outer periphery of at least one of the inner tube portion 54 and the middle plug 59 (in this embodiment, both), which releases the pressure inside the container body 2C when the pressure inside the container body 2C rises to a predetermined pressure.

[0099] The pressure release section 70 has a recess or cutout section (recess in this embodiment) 70a that communicates with the inside of the container body 2C via the groove section 57. Specifically, this recess 70a is provided so as to recess at least a part of the upper side surface that forms the groove section 57 among the outer periphery of the inner cylinder section 54.

[0100] The number of recesses 70a may be one or more. When a plurality of recesses 70a are provided, they are preferably arranged at equal intervals in the circumferential direction of the groove portion 57. In addition, the width of the recesses 70a in the circumferential direction is preferably set within an angle range of 60° or less, since if the width is too wide, it may cause leakage.

[0101] Furthermore, the pressure release section 70 has a recess 70b that communicates with the inside of the container body 2C via the groove section 64. Specifically, this recess 70b is provided so as to recess at least a part of the upper side surface that forms the groove section 64 of the outer periphery of the inside plug 59.

[0102] The number of recesses 70b may be one or more. When a plurality of recesses 70b are provided, they are preferably arranged at equal intervals in the circumferential direction of the groove portion 64. In addition, the width of the recesses 70b in the circumferential direction is preferably set within an angle range of 60° or less, since if the width is too wide, it may cause leakage.

[0103] In the cap unit 1C of this embodiment, when the waterproof packing 55 is fitted into the groove 57, the waterproof packing 55 blocks the gap between the groove 57 and the recess 70a. In addition, the gap between the inside of the container body 2C and the inner tube 54 is sealed (watertight) by the waterproof packing 55.

[0104] When the pressure inside the container body 2C rises from this state to a predetermined value (for example, 200 kPa or more and 800 kPa or less), the waterproof packing 55 elastically deforms, and the groove 57 and the recess 70a communicate with each other. This allows the pressure inside the container body 2C to be released from the recess 70a to the outside.

[0105] When a plurality of recesses 70a are provided, the set value of the pressure at which the watertight gasket 55 elastically deforms can be adjusted by varying the circumferential width of each recess.

[0106] On the other hand, after the pressure inside the container body 2C is released, the waterproof packing 55 elastically returns to its original state, blocking the gap between the groove 57 and the recess 70a. As a result, the gap between the inside of the container body 2C and the inner tube 54 is again sealed (watertight).

[0107] Therefore, in the capped container 100C equipped with the cap unit 1C of this embodiment, as the pressure inside the container body 2C increases, the fastening force due to the screwing between the female thread portion 6 on the container body 2C side and the male thread portion 56 on the inner tube portion 54 side increases, so that the cap body 51 does not become difficult to turn in the opening direction, and the cap body 51 (cap unit 1C) can be easily removed from the container body 2C.

[0108] Furthermore, in the capped container 100C of this embodiment, when removing the cap body 51 (cap unit 1C) from the container body 2C, it is possible to prevent the cap body 51 (cap unit 1C) from flying upward due to increased pressure within the container body 2C.

[0109] In the cap unit 1C of this embodiment, when the lid gasket 60 is fitted into the groove 64, the lid gasket 60 blocks the gap between the groove 64 and the recess 70b. The gap between the inside of the inner tube 54 and the inside plug 59 is sealed (watertight) by the lid gasket 60.

[0110] When the pressure inside the container body 2C rises from this state to a predetermined value (for example, 200 kPa or more and 800 kPa or less), the lid gasket 60 elastically deforms, and the groove 64 and the recess 70b communicate with each other. This allows the pressure inside the container body 2C to be released from the recess 70b to the outside.

[0111] When a plurality of recesses 70b are provided, the set value of the pressure at which the watertight gasket 60 elastically deforms can be adjusted by varying the circumferential width of each recess.

[0112] On the other hand, after the pressure inside the container body 2C is released, the lid gasket 60 elastically returns to its original position, blocking the gap between the groove 64 and the recess 70b. As a result, the gap between the inside of the inner tube 54 and the inside plug 59 is again sealed (watertight).

[0113] Therefore, in the capped container 100C equipped with the cap unit 1C of this embodiment, as the pressure inside the container body 2C increases, the fastening force due to the screwing between the female threaded portion 62 on the inner tube portion 54 side and the male threaded portion 63 on the inner plug 59 side increases, so that the outer lid 58 does not become difficult to turn in the opening direction, and the lid body 52 can be easily removed from the cap body 51.

[0114] Furthermore, in the capped container 100C of this embodiment, when the lid body 52 is removed from the cap body 51, it is possible to prevent the lid body 52 from flying upward due to the increased pressure inside the container body 2C.

[0115] As described above, in the capped container 100C of this embodiment, the cap body 51 and the lid body 52 can be easily and safely opened while preventing an increase in pressure inside the container body 2C. In addition, it is possible to improve the operability when opening the cap body 51 and the lid body 52 while maintaining good sealing performance provided by the watertight packing 55 and the lid packing 60. Therefore, the capped container 100C including such a cap unit 1C can be further improved in usability.

[0116] In addition, in the cap unit 1C of this embodiment, the inner tube portion 54 is configured to be freely attached and detached to the above-mentioned container body 2C by screwing, but it is also possible to configure the outer tube portion 53 to be freely attached and detached to the container body 2C by screwing.

[0117] 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. In the above embodiment, capped containers 100A, 100B, 100C are exemplified, which have a heat retention function provided by container bodies 2A, 2B, 2C having the above-mentioned vacuum insulation structure, but the present invention can also be applied to capped containers having a container body that does not have a vacuum insulation structure. [Explanation of symbols]

[0118] 1A, 1B, 1C... Cap unit 2A, 2B, 2C... Container body 3... Outer container 4... Inner container 5... Vacuum insulation layer 6... Female thread portion 7... Projection portion 8... Outer lid 9... Inner lid 10... Water stop packing (elastic seal member) 11... Inner plug 12... Air vent 13... Plug body 14... Male thread portion 15... Groove portion 16... Insulation material 17... Elastic click portion 18... Fitting groove 20... Pressure release portion 20a... Notch portion 30... Cap body 31... Outer lid 32... Inner plug 33... Water stop packing (elastic seal member) 34... Male thread portion 35... Groove portion 40... Pressure release portion 40a... Recess 50... Liquid passage hole 51... Cap body 52... Lid body 53... Outer tube portion 54... Inner tube portion 55... Water stop packing (elastic seal member) 56: Male thread portion 57: Groove portion 58: Outer lid 59: Inner plug 60: Lid packing (elastic seal member) 61: Heat insulating material 62: Female thread portion 63: Male thread portion 64: Groove portion 70: Pressure release portion 70a: Recess portion 70b: Recess portion 100A, 100B, 100C: Container with cap

Claims

1. A cap unit that is attached to a container body having an open top, an outer lid for covering an upper opening of the container body; an inner lid that is fitted into the inside of the container body from an upper opening of the container body; a waterproof packing located on the outer periphery of the inner lid to seal the gap between the inside of the container body and the inner lid; The water-stopping packing is made of a ring-shaped elastic seal member that is in contact with a protruding portion that protrudes from the inside of the container body over the entire circumference, The inner lid is attached to the inner lid in a state where the inner lid is fitted into a ring-shaped groove provided on an outer periphery of the inner lid, a pressure release portion that releases pressure in the container body when the pressure in the container body rises to a predetermined pressure is provided on the outer periphery of the inner lid; the pressure release portion has a recess or a notch that communicates with the inside of the container body via the groove, The recess or cutout portion is provided by recessing or cutting out at least a part of an upper side surface forming the groove portion, When the elastic seal member is fitted into the groove, the elastic seal member separates the groove from the recess or the notch, A cap unit characterized in that when the pressure inside the container body rises to a predetermined pressure, the elastic sealing member elastically deforms, establishing a state of communication between the groove portion and the recess or notch, thereby releasing the pressure inside the container body to the outside through the recess or notch.

2. A cap unit that is attached to a container body having an open top, An outer lid for covering the outside of the container body; an inner plug located at a central portion of the inner side of the outer lid and fitted into the inner side of the container body from an upper opening of the container body; a watertight gasket located on the outer periphery of the inside plug to seal the gap between the inside of the container body and the inside plug; The water-stopping packing is made of a ring-shaped elastic seal member that is in contact with a protruding portion that protrudes from the inside of the container body over the entire circumference, The inner plug is attached to the inner plug in a state where the inner plug is fitted into a ring-shaped groove provided on an outer periphery of the inner plug, a pressure release portion is provided on an outer periphery of the inside plug, the pressure release portion releasing the pressure in the container body when the pressure in the container body rises to a predetermined pressure; the pressure release portion has a recess or a notch that communicates with the inside of the container body via the groove, The recess or cutout portion is provided by recessing or cutting out at least a part of an upper side surface forming the groove portion, When the elastic seal member is fitted into the groove, the elastic seal member separates the groove from the recess or the notch, A cap unit characterized in that when the pressure inside the container body rises to a predetermined pressure, the elastic sealing member elastically deforms, establishing a state of communication between the groove portion and the recess or notch, thereby releasing the pressure inside the container body to the outside through the recess or notch.

3. A cap unit that is attached to a container body having an open top, a cap body attached to the mouth and neck portion of the container body and having a liquid passage hole communicating with the inside of the container body; a cover body that is detachably attached to the cap body by screwing and that opens and closes the liquid passage hole, The cap body has an inner tube portion that is fitted into the inside of the container body from an upper opening of the container body; a waterproof packing located on the outer periphery of the inner cylindrical portion to seal the gap between the inside of the container body and the inner cylindrical portion, The water-stopping packing is made of a ring-shaped elastic seal member that is in contact with a protruding portion that protrudes from the inside of the container body over the entire circumference, The inner cylindrical portion is attached to the inner cylindrical portion in a state where the inner cylindrical portion is fitted into a ring-shaped groove provided on an outer periphery of the inner cylindrical portion, The lid body includes an outer lid that covers the outside of the cap body, and an inner plug located at a center portion of the inner side of the outer lid and fitted inside the cap body to close the liquid passage hole; a lid packing that is located on an outer periphery of the inside plug and seals a gap between the inside of the cap body and the inside plug, The lid packing is made of a ring-shaped elastic seal member that is in contact with the inner circumferential surface of the cap body over the entire circumference, The inner plug is attached to the inner plug in a state where the inner plug is fitted into a ring-shaped groove provided on an outer periphery of the inner plug, a pressure release portion that releases pressure in the container body when the pressure in the container body rises to a predetermined pressure is provided on an outer periphery of at least one of the inner tube portion and the inside plug; the pressure release portion has a recess or a notch that communicates with the inside of the container body via the groove, The recess or cutout portion is provided by recessing or cutting out at least a part of an upper side surface forming the groove portion, When the elastic seal member is fitted into the groove, the elastic seal member separates the groove from the recess or the notch, A cap unit characterized in that when the pressure inside the container body rises to a predetermined level, the elastic sealing member elastically deforms, establishing communication between the groove portion and the recess or notch, thereby releasing the pressure inside the container body to the outside through the recess or notch.

4. 4. The cap unit according to claim 1, wherein the recesses or cutouts are arranged at equal intervals in a circumferential direction of the groove.

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

6. 6. The container with a cap according to claim 5, wherein the container body has a vacuum insulation structure.

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