Uncork cap and inner plug of said uncork cap

Abstract

To provide an unplugging cap and an inside plug of the unplugging cap capable of adjusting a discharge amount from a pouring cylinder without limiting a hole diameter of the pouring cylinder to be small.SOLUTION: An unplugging cap 1 comprises: an inside plug 2 which has a pouring cylinder 21 and a plug body 22, and can be mounted on a mouth part 51a of a container body 50; and an over-cap 3 which is attachable to and detachable from the inside plug 2. The plug body 22 seals the inside of the pouring cylinder 21 through a thin weakened part 23. When the cap 3 is opened, the thin weakened part 23 is broken so that the plug body 22 moves from the inside plug 2 to the cap 3. The inside plug 2 comprises a plurality of projections 24 at a lower end 21e of the pouring cylinder 21 circumferentially at intervals.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to an uncork cap and an inner plug of the uncork cap. [Background technology]

[0002] A conventional uncork cap, for example, includes a stopper body that seals the dispensing tube of an inner plug together with a thin-walled weakened portion, and the stopper body is transferred from the dispensing tube to the overcap by breaking the thin-walled weakened portion when the overcap is opened (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-105130 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the conventional uncork cap, if the hole diameter of the dispensing tube is reduced to suppress the amount of discharge from the dispensing tube, the strength of the plug body is reduced, making the thin-walled weakened portion more likely to break. In contrast, if the hole diameter of the dispensing tube is increased, the strength of the plug body is increased, but the amount of discharge from the dispensing tube increases. In other words, the conventional uncork cap has room for improvement in terms of adjusting the amount of discharge from the dispensing tube without reducing the hole diameter of the dispensing tube.

[0005] An object of the present invention is to provide an extractor cap and an inner plug of the extractor cap that are capable of adjusting the amount of liquid discharged from a dispensing cylinder without reducing the hole diameter of the dispensing cylinder. [Means for solving the problem]

[0006] The uncork cap according to the present invention has a dispensing tube and a stopper body, the stopper body sealing the inside of the dispensing tube via a thin-walled weakened portion, an inner stopper that can be attached to the mouth of the container body, and an overcap that can be attached and detached to the inner stopper, and when the overcap is opened, the thin-walled weakened portion is broken, so that the stopper body moves from the inner stopper to the overcap, and the inner stopper has a plurality of protrusions at the lower end of the dispensing tube, spaced apart circumferentially around the dispensing tube.

[0007] In the extractor cap according to the present invention, the protrusion may have, in an axial cross-sectional view, a base portion extending in the axial direction and a tip portion inclined inward in a direction perpendicular to the axis.

[0008] In the unscrew cap according to the present invention, the protrusion may be inclined inward in a direction perpendicular to the axis when viewed in axial cross section.

[0009] 4. The uncork cap according to claim 3, wherein the protrusion has a stepped shape.

[0010] In the unscrew cap according to the present invention, the protrusion may extend in the axial direction when viewed in axial cross section.

[0011] In the extractor cap according to the present invention, the inner plug can have a gap filling portion that fills the dispensing tube side gap formed together with the lower end of the dispensing tube, among the gaps formed between adjacent protrusions in the circumferential direction.

[0012] In the uncorking cap according to the present invention, the hole diameter of the dispensing barrel may be φ7 mm to φ20 mm.

[0013] The inner plug of the uncork cap according to the present invention is the inner plug of any of the uncork caps described above. [Effects of the Invention]

[0014] According to the present invention, it is possible to provide an uncork cap and an inner plug of the uncork cap that are capable of adjusting the amount of liquid discharged from a dispensing cylinder without reducing the hole diameter of the dispensing cylinder. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is a side view showing an unscrew cap according to a first embodiment of the present invention. [Figure 2] 2 is a cross-sectional view taken along the line AA in FIG. 1. [Figure 3] 1 is a side view showing an inside plug according to a first embodiment of the present invention. FIG. [Figure 4] 4 is a cross-sectional view taken along the line AA in FIG. 3. [Figure 5] 5 is a cross-sectional view showing an inside plug according to a second embodiment of the present invention, taken along the line XX in FIG. 3. FIG. [Figure 6] 2 is a cross-sectional view showing an inside plug according to a third embodiment of the present invention, taken along the line XX in FIG. 3. FIG. [Figure 7] FIG. 7 is an enlarged view showing an area Z1 in FIG. [Figure 8] FIG. 8 is a cross-sectional view of FIG. 7 taken along the line Y-Y. [Figure 9] 2 is a cross-sectional view showing an inside plug according to a fourth embodiment of the present invention, taken along the line XX in FIG. 3. FIG. [Figure 10] 2 is a cross-sectional view showing an inside plug according to a fifth embodiment of the present invention, taken along the line XX in FIG. 3. FIG. [Figure 11] FIG. 11 is an enlarged view showing an area Z2 in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0016] Hereinafter, various embodiments of the uncork cap according to the present invention will be described in detail with reference to the drawings. In the following description, substantially identical components (items) will be designated by the same reference numerals, and the description thereof will be omitted.

[0017] In the following description, the direction in which the central axis O of the unscrew cap (hereinafter simply referred to as the "central axis O") extends is referred to as the axial direction. One axial side and the other axial side are also referred to as the lower side and the upper side, respectively. Furthermore, in the following description, a direction perpendicular to the axial direction is referred to as the axial direction. The axial direction is also referred to as the radial direction. Additionally, in the following description, a direction around the central axis O is also referred to as the circumferential direction.

[0018] The pull-out cap 1 according to the present invention comprises an inside plug 2 having a dispensing tube 21 and a plug body 22 and attachable to the opening 50a of a container body 50, and an overcap 3 that is detachable from the inside plug 2. The plug body 22 seals the inside of the dispensing tube 21 via a thin-walled weakened portion 23. When the overcap 3 is opened, the pull-out cap 1 breaks the thin-walled weakened portion 23, allowing the plug body 22 to move from the inside plug 2 to the overcap 3. The inside plug 2 has a plurality of protrusions 24 spaced apart in the circumferential direction at the lower end 21e of the dispensing tube 21.

[0019] Reference numeral 1 in Fig. 1 denotes an uncork cap according to a first embodiment of the present invention. Fig. 1 shows the uncork cap 1 from a side. Fig. 2 is a cross-sectional view taken along line XX in Fig. 1. Fig. 2 shows the uncork cap 1 in a cross-section taken along line XX (axial cross-section) including the central axis O of the uncork cap 1.

[0020] As shown in Fig. 2, in this embodiment, the unscrew cap 1 is the unscrew cap 1 according to the first embodiment of the present invention. In this embodiment, the overcap 3 is a screw cap that is removably screwed onto the inside plug 2. In this embodiment, the overcap 3 has a peripheral wall 31 that circumferentially surrounds the inside plug 2 when attached to the inside plug 2, and a top wall 32 that closes the upper end of the peripheral wall 31. In addition, in this embodiment, the overcap 3 has a first cylindrical portion 33 that extends downward from the top wall 32. The first cylindrical portion 33 has a threaded portion 33a that is screwed onto the inside plug 2.

[0021] In this embodiment, the overcap 3 has a locking portion 34a that is locked to the plug body 22 in the axial direction when attached to the inside plug 2. In this embodiment, the overcap 3 has a fitting portion 35b that is fitted to the plug body 22 in the circumferential direction when removed from the inside plug 2.

[0022] In this embodiment, the locking portion 34a is provided on the shaft portion 34 extending downward from the top wall 32. In this embodiment, the locking portion 34a is a convex portion that protrudes radially outward from the outer circumferential surface of the shaft portion 34. The fitting portion 35b is provided on the second cylindrical portion 35 extending downward from the top wall 32. In this embodiment, the fitting portion 35b is an internal tooth that protrudes radially inward from the inner circumferential surface of the second cylindrical portion 35.

[0023] In this embodiment, the overcap 3 has a third cylindrical portion 36 extending downward from the top wall 32. The lower end of the third cylindrical portion 36 has a sound-emitting protrusion, and when the overcap 3 is opened or closed, the third cylindrical portion 36 passes over a protrusion provided on the upper end of the top wall 27 of the inside plug 2, which will be described later, to produce a sound (click). In this embodiment, the overcap 3 is a screw cap that is removably screwed onto the inside plug 2. However, the overcap 3 may also be a hinge cap that is connected to the inside plug 2 in an openable and closable manner.

[0024] Fig. 3 shows a side view of the inside plug 2A according to the first embodiment of the present invention. Fig. 4 is a cross-sectional view taken along line XX in Fig. 3. Fig. 4 shows the inside plug 2A in a cross-section taken along line XX (axial cross-section) including the central axis O. In this embodiment, the central axis of the dispensing cylinder 21 is coaxial with the central axis O.

[0025] 4, the inside plug 2A has an attachment portion 25 that is attached to the opening 50a (see FIG. 2) of the container body 50, a peripheral wall 26 to which the overcap 3 is screwed, and a top wall 27 that covers the peripheral wall 26. The peripheral wall 26 is formed with a threaded portion 26a that is screwed with the threaded portion 33a of the overcap 3.

[0026] In this embodiment, the attachment portion 25 is formed by an inner cylindrical portion 251, an outer cylindrical portion 252, and a connecting portion 253. This is an annular connecting portion that connects the upper end of the inner cylindrical portion 251 to the upper end of the outer cylindrical portion 252 over the entire circumferential direction. In this embodiment, the connecting portion 253 connects the inner cylindrical portion 251 to the outer cylindrical portion 252 with a radial gap therebetween. As a result, an annular groove 25g extending in the circumferential direction is formed at the lower end of the attachment portion 25. The inside plug 2 can be attached to the mouth 50a of the container body 50 by inserting the mouth 50a of the container body 50 into the annular groove 25g and fitting the mouth 50a of the container body 50 into the annular groove 25g. In this embodiment, a cylindrical body 254 is connected to the outer cylindrical portion 252. The cylindrical body 254 has a circumferentially extending notched recess 25c and a knob portion below the notched recess 25c via a weakened portion. This allows the inside plug 2A to be easily separated from the opening 50a of the container body 50 by breaking the outer cylinder portion 252 along the notched recess 25c.

[0027] In this embodiment, the dispensing tube 21 is provided on the top wall 27. The inner circumferential surface f21 of the dispensing tube 21 forms a dispensing path R inside the dispensing tube 21 for dispensing the content filled in the container body 50. The dispensing path R is formed so as to penetrate the top wall 27.

[0028] The stopper body 22 is disposed within the dispensing passage R of the dispensing tube 21. The stopper body 22 seals the dispensing passage R via the thin-walled weakened portion 23. The thin-walled weakened portion 23 connects the stopper body 22 and the dispensing tube 21. The thin-walled weakened portion 23 extends circumferentially over the entire circumference. When the stopper body 22 is separated from the dispensing tube 21 along the thin-walled weakened portion 23, a discharge port A is formed inside the dispensing tube 21, which connects the dispensing passage R between the inside of the container body 50 and the outside world.

[0029] In this embodiment, the plug 22 has a locking portion 22a that is locked to the overcap 3 in the axial direction when the overcap 3 is attached. Also, in this embodiment, the plug 22 has a fitting portion 22b that is fitted to the overcap 3 in the circumferential direction when the overcap 3 is removed.

[0030] In this embodiment, the plug 22 has a recess 28 into which the shaft portion 34 of the overcap 3 can be inserted. The locking portion 22a is provided on an inner circumferential surface 22f1 of the plug 22 formed by the recess 28. In this embodiment, the locking portion 22a is a protrusion that protrudes radially inward from the inner circumferential surface 22f1 of the plug 22. The fitting portion 22b is provided on an outer circumferential surface 22f2 of the plug 22. In this embodiment, the fitting portion 22b is an external tooth that protrudes radially outward from the outer circumferential surface 22f2 of the plug 22.

[0031] 2, in this embodiment, the fitting portion 35b of the overcap 3 and the fitting portion 22b of the locking portion 22a rotate freely relative to each other when the overcap 3 is screwed onto the inside plug 2. Furthermore, in this embodiment, the fitting portion 35b of the overcap 3 and the fitting portion 22b of the locking portion 22a engage with each other when the overcap 3 is removed from the inside plug 2. That is, in this embodiment, the fitting portion 35b of the overcap 3 and the fitting portion 22b of the locking portion 22a constitute a ratchet mechanism that engages with each other only when the overcap 3 is removed from the inside plug 2. Note that, when the overcap 3 is set onto the inside plug 2 by tapping rather than by screwing, the mechanism is not limited to a ratchet mechanism, and a structure in which concave and convex protrusions engage with each other may also be used.

[0032] In this embodiment, when the overcap 3 is screwed onto the inside plug 2, the fitting portion 35b of the overcap 3 and the fitting portion 22b of the locking portion 22a rotate freely relative to each other. This allows the overcap 3 to be screwed onto the inside plug 2 using the unscrew cap 1. Therefore, using the unscrew cap 1, the overcap 3 can be attached to the inside plug 2 by screwing the overcap 3. At this time, the locking portion 34a of the overcap 3 climbs over the locking portion 22a of the plug body 22 and is locked by the locking portion 22a, but circumferential rotation of the overcap 3 is permitted.

[0033] On the other hand, in this embodiment, when the overcap 3 is removed, if the overcap 3 is loosened, the locking portion 34a of the overcap 3 is locked with the locking portion 22a of the stopper body 22, causing the overcap 3 to pull up the stopper body 22. Furthermore, in this embodiment, when the overcap 3 is removed, the fitting portion 35b of the overcap 3 and the fitting portion 22b of the inner plug 2 fit together. As a result, with the extractor cap 1, the thin-walled weakened portion 23 can be broken by screwing up the stopper body 22 of the inner plug 2 while removing the overcap 3. Therefore, with the extractor cap 1, the stopper body 22 can be moved to the overcap 3 at the same time as removing the overcap 3, thereby forming a pouring outlet A inside the pouring tube 21.

[0034] Next, in this embodiment, there are cases where it is desirable to keep the amount of discharge from the dispensing tube 21 small when dispensing the contents from the dispensing tube 21. For example, when dispensing a seasoning liquid such as a dressing, it is desirable to keep the amount of discharge small to prevent excessive dispensing.

[0035] In contrast, if the hole diameter D of the dispensing tube 21 is reduced, the amount of liquid discharged from the dispensing tube 21 can be reduced. Referring to FIG. 4, in this embodiment, the hole diameter D of the dispensing tube 21 is the diameter of the dispensing outlet A. The shape of the dispensing outlet A is formed by the thin-walled weakened portion 23. However, in a conventional uncorking cap, if the hole diameter D of the dispensing tube 21 is reduced, the thin-walled weakened portion 23 becomes more likely to break when the inner plug 2 is set (e.g., plugged) into the opening 50a of the container body 50. Furthermore, when removing the overcap 3, the thin-walled weakened portion 23 is likely to become fuzzy, which can cause problems when opening the container.

[0036] On the other hand, increasing the hole diameter D of the dispensing tube 21 can increase the strength of the stopper 22. However, increasing the hole diameter D of the dispensing tube 21 results in an increase in the amount of liquid discharged from the dispensing tube 21.

[0037] That is, the conventional uncorking cap described above has room for improvement in terms of adjusting the amount of discharge from the dispensing cylinder 21 without restricting the hole diameter D of the dispensing cylinder 21 to a small size.

[0038] In contrast, referring to FIG. 4, the inside stopper 2 has a plurality of protrusions 24. The inside stopper 2 is provided with a plurality of protrusions 24 spaced apart in the circumferential direction at the lower end 21e of the dispensing tube 21. The protrusions 24 function as barriers that prevent water from flowing into the spout A from the container body 50. In addition, a gap C extending in the axial direction is formed between two circumferentially adjacent protrusions 24. The gap C functions as a flow path for the contents through the dispensing tube 21 and as an air exchange flow path for performing air exchange between the container body 50 and the outside world. The gap C extends axially downward from the lower end 21e of the dispensing tube 21. Therefore, by forming the gap C between the two protrusions 24, it becomes possible to efficiently adjust the amount of content dispensed and to efficiently perform air exchange between the container body 50 and the outside world through the dispensing tube 21.

[0039] With the inside stopper 2, when the container body 50 is tilted so that the dispensing tube 21 faces downward, the multiple protrusions 24 function as a barrier to the contents. Therefore, by providing multiple protrusions 24 at intervals in the circumferential direction on the lower end 21e of the dispensing tube 21, the amount of discharge from the dispensing tube 21 can be kept low. Furthermore, the gaps C formed between two of the protrusions 24 each ensure efficient air replacement through the dispensing tube 21. Therefore, with the inside stopper 2, even if the hole diameter D of the dispensing tube 21 is increased, the amount of discharge from the dispensing tube 21 can be kept low, and the contents can be smoothly dispensed.

[0040] Furthermore, according to the present invention, the circumferential width W24 of the protrusion 24 and the circumferential gap width Wc of the gap C can each be adjusted as appropriate. With the inside plug 2, the discharge rate from the dispensing tube 21 can be adjusted to a desired discharge rate by appropriately adjusting the size of the circumferential width W24 of the protrusion 24. Furthermore, with the inside plug 2, the discharge rate from the dispensing tube 21 can be adjusted to a desired discharge rate even by appropriately adjusting the size of the circumferential gap width Wc of the gap C.

[0041] As is clear from the above, according to this embodiment, the uncork cap 1 and the inner plug 2 of the uncork cap 1 are capable of adjusting the discharge amount from the dispensing tube 21 without keeping the hole diameter D of the dispensing tube 21 small.

[0042] According to the present invention, the circumferential widths W24 of the plurality of protrusions 24 can be made equal to each other. Also, according to the present invention, the circumferential gap widths Wc of the plurality of gaps C can be made equal to each other. Furthermore, in this embodiment, the circumferential arrangement pitches of the plurality of protrusions 24 (plurality of gaps C) are set equal. As a result, in this embodiment, the protrusions 24 and the gaps C are provided at equal intervals in the circumferential direction.

[0043] 4, in this embodiment, the protrusions 24 are fins 24A that, in an axial cross-sectional view, have a base 24a extending in the axial direction and a tip 24b inclined inward in a direction perpendicular to the axis. Here, the "fins" are barrier plates that prevent the contents from flowing from the container body 50 into the spout A. In this embodiment, nine protrusions 24 are arranged at intervals in the circumferential direction.

[0044] In this embodiment, base 24a of blade 24A extends axially and parallel to central axis O. Furthermore, in this embodiment, tip 24b is inclined inward in the direction perpendicular to the axis as it extends downward. Referring to FIG. 2, base 24a and tip 24b of blade 24A are connected at angle α inward in the direction perpendicular to the axis. Angle α is preferably 30 to 60 degrees and can be set as appropriate.

[0045] Also, referring to Figure 2, in the blade 24A, the extension direction length Lb of the tip 24b (hereinafter also referred to as the "tip length Lb") is shorter than the extension direction length La of the base 24a (hereinafter also referred to as the "base length La").

[0046] 5 is a cross-sectional view of a second embodiment of the inside plug 2B of the present invention, taken along line XX in FIG. 3. Inside plug 2B is a modified version of inside plug 2A. In this embodiment, in wing 24A, tip length Lb is longer than base length La. In this way, in wing 24A, tip length Lb and base length La can be different. However, according to the present invention, in wing 24A, tip length Lb and base length La can be the same.

[0047] Furthermore, according to the present invention, the inside plug 2 can have a gap filling portion 29 that fills in a dispensing-tube-side gap Ca, which is formed together with the lower end 21e of the dispensing tube 21, among gaps C formed between two circumferentially adjacent protrusions 24. In this case, of one gap C, a protrusion-tip-side gap Cb other than the dispensing-tube-side gap Ca remains as part of the gap C. In this case, by providing the gap filling portion 29, the discharge rate from the dispensing tube 21 can be further reduced, and the amount of reduction can be further adjusted.

[0048] Fig. 6 is a cross-sectional view showing an inside plug 2C according to a third embodiment of the present invention, taken along the line XX in Fig. 3. Fig. 7 is an enlarged view showing region Z1 in Fig. 6. Fig. 8 is a cross-sectional view taken along the line YY in Fig. 7. The YY cross-section is a cross-section perpendicular to the central axis O (a cross-section perpendicular to the axis).

[0049] 6, in inside plug 2C, protrusion 24 is a wing piece 24A having a base portion 24a and a tip portion 24b. In this embodiment, gap C is formed by a dispensing tube side gap Ca and a protrusion tip side gap Cb. Dispensing tube side gap Ca is a part of gap C. Dispensing tube side gap Ca extends from lower end 21e of dispensing tube 21 toward the tip of protrusion 24. Protrusion tip side gap Cb is the remainder of gap C. Protrusion tip side gap Cb is connected to dispensing tube side gap Ca and extends all the way to the tip of protrusion 24.

[0050] 7, in this embodiment, the pouring tube side gap Ca is a base side gap formed between the bases 24a of two circumferentially adjacent vanes 24A. Also, in this embodiment, the projection tip side gap Cb is a tip side gap formed between the tips 24b of two circumferentially adjacent vanes 24A.

[0051] Referring to Fig. 8, in this embodiment, three vanes 24A are arranged at intervals in the circumferential direction. Furthermore, referring to Fig. 7, in this embodiment, a gap filling portion 29 that fills the pouring-tube-side gap Ca of one gap C of the three gaps C is provided. In this case, the protrusion-tip-side gap Cb of gap C where gap filling portion 29 is provided remains as part of gap C.

[0052] According to this embodiment, by providing gap filling portion 29 in part of gap C, the amount of discharge from dispensing tube 21 is reduced, while the amount of reduction can be adjusted by projection tip side gap Cb remaining as part of gap C. Therefore, in this case, while the amount of discharge from dispensing tube 21 is reduced by gap filling portion 29, the amount of reduction can be further adjusted by gap filling portion 29 (projection tip side gap Cb).

[0053] As described above, in this embodiment, the gap filling portion 29 is provided in one of the three gaps C formed at intervals in the circumferential direction. In this case, when the container body 50 is tilted so that the dispensing tube 21 faces downward, the three protrusions 24 and one gap filling portion 29 function as barriers to the contents. Therefore, by providing the gap filling portion 29, the amount of discharge from the dispensing tube 21 can be further reduced. In this case, each of the two gaps C ensures efficient air replacement through the dispensing tube 21, and air replacement through the dispensing tube 21 is also ensured in the gap Cb on the protrusion tip side. Therefore, with the inside stopper 2C, even if the hole diameter D of the dispensing tube 21 is increased, the amount of discharge from the dispensing tube 21 can be reduced, and the contents can be more smoothly dispensed.

[0054] Furthermore, according to the present invention, the protrusions 24 may be inclined inward in the direction perpendicular to the axis when viewed in axial cross section.

[0055] FIG. 9 is a cross-sectional view of a plug 2D according to a fourth embodiment of the present invention, taken along the line XX in FIG. 3. In this embodiment, the protrusion 24 is a blade 24D that is inclined inward in the direction perpendicular to the axis when viewed in axial cross section. Referring to FIG. 9, the blade 24D is inclined inward in the direction perpendicular to the axis as it extends downward. In this embodiment, the blade 24D is connected to the inner side in the direction perpendicular to the axis at an angle α. The angle α can be set as appropriate. In this embodiment, nine blades 24D are arranged at intervals in the circumferential direction.

[0056] Furthermore, the blades 24D can be formed in a stepped shape. Fig. 10 is a cross-sectional view of a inside plug 2E according to a fifth embodiment of the present invention, taken along the line XX in Fig. 3. In this embodiment, the blades 24E are a modified example of the blades 24D in Fig. 9. In this embodiment, nine blades 24E are arranged at intervals in the circumferential direction. In an axial cross-sectional view, the blades 24E are inclined inward in the direction perpendicular to the axis and are formed in a stepped shape.

[0057] FIG. 11 is an enlarged view of region Z2 in FIG. 10. Referring to FIG. 11, in this embodiment, the axially extending surface Fe of the blade 24E is inclined inward in the axial direction relative to the horizontal plane (the axially extending surface) at an angle β toward the tip of the blade 24E. In this case, since the axially extending surface Fe is inclined downward, it is possible to prevent liquid from pooling on the blade 24E when the container body 50 is stood upright after pouring. Furthermore, in this embodiment, the blade 24E has multiple staircase blocks B24. In this embodiment, the axial length LC of the connecting portion 24c of the multiple staircase blocks B24 is shorter than the axial length LB of the staircase block B24. That is, in this embodiment, the axial thickness of the staircase-shaped joint (connecting portion 24c) of the blade 24E is thin. In this case, when the blade 24E is molded as part of the inside plug 2E, the blade 24E is more likely to deform during removal from the mold. Therefore, in this case, the workability during the die-cutting operation is improved.

[0058] Furthermore, according to the present invention, protrusion 24 may extend in the axial direction in an axial cross-sectional view. In this case, protrusion 24 may be a wing that extends in the axial direction parallel to central axis O, like base 24a of wing 24A described above.

[0059] In the inside stoppers 2A-2E of the above-described embodiments, the hole diameter D of the dispensing tube 21 is preferably φ7 mm to φ20 mm. For example, if the hole diameter D is φ6 mm or less, even if the contents have a relatively low viscosity, air displacement through the dispensing tube 21 may be difficult, and the container body 50 may need to be gripped and squeezed to dispense the contents. In contrast, if the hole diameter D is φ7 mm or more, air displacement through the dispensing tube 21 is facilitated when dispensing the contents from the dispensing tube 21. Therefore, if the hole diameter D is φ7 mm or more, the contents can be dispensed by simply tilting the container body 50 downward, without gripping and squeezing the container body 50. Furthermore, when dispensing a seasoning liquid such as a dressing, the most appropriate numerical range for the hole diameter D is φ8 mm to φ16 mm. In this embodiment, the hole diameter D is φ10 mm.

[0060] The container body 50 can be filled with, for example, a liquid. Suitable examples of such liquids include liquids with a viscosity of 1 to 10,000 mpa·s, and specific examples include seasoning liquids such as soy sauce, dashi soy sauce, mirin, dressing, and oil. However, the liquid filled in the container body is not limited to seasoning liquids, and this is particularly effective when dispensing contents with low viscosity. In this case, the unscrew cap 1 (inner plug 2) can also be easily set on the container body 50.

[0061] Furthermore, according to the present invention, as explained with respect to the inside plug 2C, the preferred number of protrusions 24 is 2 to 3. However, the number of protrusions 24 may be, for example, 2 to 9, or 4 to 9. In other words, the number of protrusions 24 may be two or more.

[0062] As described above, according to the present invention, it is possible to provide an uncork cap and an inner plug of the uncork cap that are capable of adjusting the amount of discharge from the dispensing tube without reducing the hole diameter of the dispensing tube.

[0063] The above description is of exemplary embodiments of the present invention, and various modifications can be made without departing from the scope of the claims. The various configurations employed in the above-described embodiments and exemplary configurations can be substituted for or combined with each other as appropriate. [Explanation of symbols]

[0064] 1: uncork cap, 2: inner plug, 2A-2E: inner plug, 21: dispensing tube, 22: plug body, 23: thin-walled weakened portion, 24: protrusion, 24A-24E: wing (protrusion), 24a: base of wing (protrusion), 24b: tip of wing (protrusion), 29: gap filling base, 3: overcap, 50: container body, 50a: mouth of container body, C: gap, Ca: gap on dispensing tube side, Cb: gap on protrusion tip side, D: hole diameter of dispensing tube

Claims

1. an inner plug having a pouring tube and a stopper body, the stopper body sealing the inside of the pouring tube via a thin-walled weakened portion, and the inner plug being attachable to the opening of the container body; an overcap that is detachable from the inside plug; It is equipped with The thin-walled weakened portion is broken when the overcap is opened, so that the stopper body moves from the inside plug to the overcap. the inside plug includes an attachment portion that is attached to the mouth of the container body, a peripheral wall into which the overcap is screwed, and a top wall that covers the radially inner side of an upper end of the peripheral wall, The pouring tube is provided radially inside the top wall, and further The inner plug has a plurality of protrusions at the lower end of the dispensing tube, the protrusions extending downward at a radially inward position relative to the peripheral wall and spaced apart radially from the peripheral wall, and are arranged at intervals in the circumferential direction, and the uncork cap has a gap filling portion that fills the dispensing tube-side gap formed together with the lower end of the dispensing tube among the gaps formed between adjacent protrusions in the circumferential direction.

2. The extractor cap according to claim 1 , wherein the projection has, in an axial cross-sectional view, a base portion extending in the axial direction and a tip portion inclined inward in a direction perpendicular to the axis.

3. The extractor cap according to claim 1 , wherein the projection is inclined inward in a direction perpendicular to the axis when viewed in axial cross section.

4. The extractor cap according to claim 3 , wherein the projection is in the form of a step.

5. The extractor cap according to claim 1 , wherein the projection extends in the axial direction in an axial cross-sectional view.

6. The extractor cap according to any one of claims 1 to 5, wherein the hole diameter of the pouring tube is 7 mm to 20 mm.

7. An inner plug for a pull-out cap according to any one of claims 1 to 6.

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