Cap and capped container

Abstract

To provide a cap which can sufficiently seal cooling water, even when a lid is plugged to a middle plug in a state that the lid is shifted in an opening direction from a regular plugging position with respect to the middle plug.SOLUTION: A cap 10 is attached to a middle plug 11 by plugging a lid 13. The lid 13 includes an outer peripheral wall 22, an inner cylinder 23 and a first screw 24. The middle plug 11 includes a spout part 41, a first sealing surface 44 opposing to a leading end of the inner cylinder 23 in a plugging direction, an outer peripheral surface 45 opposing to an inner peripheral surface 32 of the lid 13, and a second screw 46. The leading end of the inner cylinder 23 is freely contactable and separable with / from the first sealing surface 44 in a shaft center direction 52. A seal part 66 is provided on the inner peripheral surface 32 of the lid 13. The seal part 66 comes in contact with the outer peripheral surface 45 of the middle plug 11 during a first plugging state in which a gap is generated between the leading end of the inner cylinder 23 and the first sealing surface 44 and a regular plugging state in which the leading end of the inner cylinder 23 comes in contact with the first sealing surface 44.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a cap having a screw-on lid and a container equipped with the cap. [Background technology]

[0002] Conventionally, as shown in Patent Document 1 below, for example, this type of cap has an inner stopper that is attached to the mouth of a container and a screw-type lid that can be attached and detached from the inner stopper by rotating it, and the lid is attached to the inner stopper by screwing it on.

[0003] The inside plug has a cylindrical spout, a fitting outer cylinder, a fitting inner cylinder, and a fitting top wall. The fitting top wall is formed between the upper end of the fitting outer cylinder and the upper end of the fitting inner cylinder. This forms a groove in the inside plug that is surrounded by the fitting outer cylinder, the fitting inner cylinder, and the fitting top wall and is open at the bottom. The inner plug is attached to the container by fitting the mouth of the container from below into the groove. A male screw is formed on the outer circumferential surface of the spout.

[0004] The lid has an outer cylinder and an inner cylinder. A female thread is formed on the inner peripheral surface of the inner cylinder. The male thread of the spout and the female thread of the inner cylinder are screwed together, so that the spout is inserted into the inner cylinder, and the lid is attached to the inner plug.

[0005] 15, a first tapered surface 103 is formed over the entire circumference of the inner periphery of the lower end of outer tube 102 of lid 101. A second tapered surface 104 opposing first tapered surface 103 is formed over the entire circumference of the outer periphery of fitting top wall 107 of inside plug 106. A sealing ridge 108 in contact with second tapered surface 104 is formed over the entire circumference of first tapered surface 103.

[0006] According to this, when the lid 101 is plugged and attached to the inner plug 106 to assemble the cap, the sealing ridge 108 comes into contact with the second tapered surface 104 as shown by the solid line in FIG. 15, and the lower end of the inner tube 110 of the lid 101 comes into contact with the upper surface of the fitting top wall 107 of the inner plug 106 as shown by the solid line in FIG. 16.

[0007] The container is then filled with the heat-sterilized liquid, and a cap is attached to the opening of the container. When the capped container is cooled from the outside with cooling water, the pressure inside the cap may drop below atmospheric pressure as the cooling proceeds, resulting in a negative pressure state.

[0008] In such a negative pressure state, even if cooling water is sucked in through the gap between lid 101 and inner plug 106 of the closed cap as shown by the solid line in Fig. 15, the cooling water is sealed off by sealing ridge 108 because sealing ridge 108 is in contact with second tapered surface 104. Even if sealing ridge 108 is excessively deformed and its sealing performance is reduced, causing cooling water to intrude beyond sealing ridge 108, the cooling water is sealed off by inner tube 110 because the lower end of inner tube 110 of lid 101 is in contact with the upper surface of fitting top wall 107 of inner plug 106 as shown by the solid line in Fig. 16. After cooling, the lid can be removed from the plug by rotating the lid in an opening direction. Incidentally, the above-mentioned cap is described, for example, in Patent Document 1 below. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] Patent No. 4214435 Summary of the Invention [Problem to be solved by the invention]

[0010] However, in the conventional type described above, if the lid is screwed onto the inner plug when the lid is shifted in the opening direction from the correct screwing position relative to the inner plug, the lower end of inner tube 110 of lid 101 will move upward from the upper surface of mating top wall 107 of inner plug 106, as shown by the phantom line in FIG. 16, and also, as shown by the phantom line in FIG. 15, the sealing ridge 108 will move upward from second tapered surface 104, which may result in an insufficient seal for the cooling water.

[0011] The present invention aims to provide a cap and a container with a cap that can adequately seal in cooling water even when the lid is attached to the inner plug with the lid displaced in the opening direction from the normal plugging position relative to the inner plug. [Means for solving the problem]

[0012] In order to achieve the above object, the first invention provides a container having an inner plug that is attached to a container and a screw-type lid that can be attached and detached to the inner plug by rotating the lid about an axis, A cap that is attached to an inner plug by fitting a lid, The lid is a cylindrical member that opens in the plugging direction and has an outer peripheral wall, an inner tube provided inside the outer peripheral wall, and a first screw. The inner plug has a pouring portion, a first sealing surface facing the tip of the inner cylinder in the plugging direction, an outer peripheral surface facing the inner peripheral surface of the outer peripheral wall of the lid, and a second screw; The first screw and the second screw are screwed together, The spout is inserted into the inner cylinder. A tip of the inner cylinder is movable in contact with and away from the first seal surface in the axial direction, A seal portion is provided on either the inner peripheral surface of the outer peripheral wall of the lid or the outer peripheral surface of the inside plug, In both the first plugging state in which a gap occurs between the tip of the inner tube and the first sealing surface, and the normal plugging state in which the tip of the inner tube contacts the first sealing surface, the sealing portion contacts the other of the inner surface of the outer wall of the lid and the outer surface of the inner plug.

[0013] According to this, when the lid is set in the correct plugging position relative to the inner plug and the lid is then attached to the inner plug, the correct plugging state is achieved, with the tip of the inner tube contacting the first sealing surface and the sealing portion contacting the other of the inner surface of the outer wall of the lid and the outer surface of the inner plug.

[0014] As a result, the cooling water is sealed at two locations: the sealed location between the seal portion and the other surface and the sealed location between the tip of the inner tube and the first seal surface, making it possible to prevent the cooling water from entering the inside of the lid.

[0015] Furthermore, if the lid is attached to the inner plug when the lid is displaced in the opening direction from the correct plugging position relative to the inner plug, the first plugging state is reached, and a gap is generated between the tip of the inner tube and the first sealing surface. However, even in this case, the sealing portion contacts the other of the inner circumferential surface of the lid's outer wall and the outer circumferential surface of the inner plug, so the cooling water is sealed at the sealing point between the sealing portion and the other surface. This makes it possible to prevent the cooling water from entering the inside of the lid.

[0016] The cap in the second aspect of the present invention has an inner tube having a first thread formed on an inner circumference thereof, A second screw is formed on the outer periphery of the spout portion.

[0017] In the cap according to the third invention, the seal portion is provided on the inner peripheral surface of the outer peripheral wall of the lid, protrudes radially inward from the inner peripheral surface of the outer peripheral wall, and contacts the outer peripheral surface of the inside plug.

[0018] According to this, when the plug is properly installed, the tip of the inner tube contacts the first seal surface and the seal portion contacts the outer circumferential surface of the inside plug, so that the cooling water is sealed at two points: the seal portion between the seal portion and the outer circumferential surface of the inside plug, and the seal portion between the tip of the inner tube and the first seal surface.

[0019] In addition, in the first plugging state, a gap occurs between the tip of the inner tube and the first sealing surface, but since the sealing portion contacts the outer peripheral surface of the inner plug, the cooling water is sealed at the sealing point between the sealing portion and the outer peripheral surface of the inner plug.

[0020] In the cap of the fourth invention, the outer peripheral surface of the inside plug has a second sealing surface parallel to the axis of the cap, The seal portion contacts the second seal surface.

[0021] According to this, when the plug is properly installed, the tip of the inner cylinder contacts the first seal surface and the seal portion contacts the second seal surface, so the cooling water is sealed at two points: the seal portion between the seal portion and the second seal surface, and the seal portion between the tip of the inner cylinder and the first seal surface.

[0022] In addition, in the first plugging state, a gap occurs between the tip of the inner tube and the first sealing surface, but since the sealing portion contacts the second sealing surface, the cooling water is sealed at the sealing point between the sealing portion and the second sealing surface.

[0023] The fifth invention is a capped container having the cap according to the first invention attached to a container, A plurality of protrusions are provided at the mouth of the container, protruding radially outward from the outer circumferential surface, A mounting groove is formed in the inner plug of the cap, The mouth of the container is fitted into the mounting groove together with the protrusion, The sealing portion comes into contact with the other surface at a position away from the protruding piece in the mounting groove in the opposite direction to the plugging direction.

[0024] According to this, after the lid is screwed on and attached to the inside plug, the mouth of the container is fitted into the mounting groove together with the protruding piece, thereby mounting the inside plug to the mouth of the container. At this time, the protruding piece of the mouth bites into the mounting groove, preventing the inside plug from rotating in the circumferential direction relative to the mouth of the container. This reliably prevents the inside plug from rotating together with the lid (rotating together) when the lid is rotated in the opening / closing direction.

[0025] In addition, because the protrusion of the mouth bites into the mounting groove, the outer peripheral surface of the inside plug may be slightly deformed in the radial direction at the position of the protrusion in the mounting groove. In contrast, the radial deformation of the outer peripheral surface of the inside plug decreases the further away from the protrusion in the mounting groove in the opposite direction to the plugging direction. Therefore, the seal portion contacts the other surface at a position away from the protrusion in the mounting groove in the opposite direction to the plugging direction, and is therefore less susceptible to deformation of the outer peripheral surface of the inside plug. As a result, the seal portion reliably contacts the other surface over the entire circumference, improving sealing performance. Effect of the Invention

[0026] As described above, according to the present invention, when the lid is attached to the inner plug in a state where the lid is displaced in the opening direction from the normal plugging position relative to the inner plug, a first plugging state is reached, and a gap is generated between the tip of the inner tube and the first sealing surface. However, in this case, the sealing portion contacts the other of the inner circumferential surface of the outer circumferential wall of the lid and the outer circumferential surface of the inner plug, so that the cooling water is sealed at the sealing point between the sealing portion and the other surface. As a result, even when the lid is attached to the inner plug in a state where the lid is displaced in the opening direction from the normal plugging position relative to the inner plug, the cooling water can be sufficiently sealed by preventing the cooling water from entering the inside of the lid. [Brief description of the drawings]

[0027] [Figure 1] 1 is a partially enlarged view of a capped container according to a first embodiment of the present invention. [Diagram 2] FIG. 4 is a cross-sectional view of the cap and the mouth of the container according to the first embodiment. [Diagram 3] FIG. 2 is a cross-sectional view of the inner plug and the lid of the cap according to the first embodiment. [Figure 4] FIG. [Diagram 5] FIG. [Figure 6] FIG. 11 is a plan view of the cap lid when it is set in the correct plugging position relative to the inner plug when the cap lid is plugged onto the inner plug. [Figure 7]FIG. 11 is an enlarged cross-sectional view of a portion of the cap when the lid of the cap is set in the correct plugging position relative to the inner plug and plugged. [Figure 8] FIG. 11 is a plan view of the cap when the lid is set at a position shifted in the opening direction from the normal plugging position relative to the inner plug when the lid is plugged onto the inner plug. [Figure 9] FIG. 11 is an enlarged cross-sectional view of a portion of the cap when the lid of the cap is set at a position shifted in the opening direction from the normal plugging position relative to the inner plug and then plugged. [Figure 10] FIG. 11 is a plan view of the cap when the lid is set in a position shifted in the closing direction from the normal plugging position relative to the inner plug when the lid is plugged onto the inner plug. [Figure 11] FIG. 11 is an enlarged cross-sectional view of a portion of the cap when the lid of the cap is set at a position shifted in the closing direction from the normal plugging position relative to the inner plug and then plugged. [Figure 12] 11 is a partially enlarged cross-sectional view of a cap according to a second embodiment of the present invention, showing a state in which the lid is set in a regular plugging position relative to the inner plug and plugged. FIG. [Figure 13] FIG. 2 is an enlarged cross-sectional view of a portion of the cap in the same manner as above, showing the state when the lid is set at a position shifted in the opening direction from the normal stoppering position relative to the inner plug. [Figure 14] FIG. 2 is an enlarged cross-sectional view of a portion of the cap in the same manner as above, showing the state when the lid is set at a position shifted in the closing direction from the normal stoppering position relative to the inner plug. [Figure 15] FIG. 1 is an enlarged cross-sectional view showing a conventional sealing structure between the lower end of the outer cylinder of a lid of a cap and the fitting top wall of an inner plug. [Figure 16] FIG. 4 is an enlarged cross-sectional view showing the sealing structure between the lower end of the inner tube of the cap lid and the upper surface of the fitting top wall of the inside plug. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0028] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. (First embodiment)

[0029] In the first embodiment, as shown in Figs. 1 and 2, reference numeral 1 denotes a capped container having a cap 10 attached to a container 2. The container 2 has a cylindrical opening 3 at the top. The tip of the mouth 3 is provided with a plurality of protrusions 4 that protrude radially outward from the outer circumferential surface. These protrusions 4 are arranged at predetermined angular intervals in the circumferential direction of the mouth 3.

[0030] The cap 10 has an inner plug 11 that is attached to the mouth 3 of the container 2, and a screw-type lid 13 that can be attached and detached to the inner plug 11 by rotating it about an axis 12 in the vertical direction. The cap 10 is assembled by screwing on the lid 13 and attaching it to the inner plug 11.

[0031] As shown in Figures 3 and 4, the lid 13 is a cylindrical member that opens in the plugging direction 15 (downward), and has a circular top plate portion 21, a cylindrical outer peripheral wall 22 hanging down from the outer peripheral edge of the top plate portion 21, a cylindrical inner tube 23 provided on the inside of the outer peripheral wall 22, a female thread 24 (an example of a first thread) formed on the inner circumference of the inner tube 23, a cylindrical sealing tube 26 provided on the inside of the inner tube 23, a cylindrical first retaining tube 27 provided on the inside of the sealing tube 26, and a cylindrical second retaining tube 28 provided on the inside of the first retaining tube 27.

[0032] A plurality of first engaging protrusions 30 protruding radially inward are formed on the inner periphery of the first retaining tube 27. A plurality of second engaging protrusions 31 protruding radially outward are formed on the outer periphery of the second retaining tube 28. As shown in FIG. 6, the top plate portion 21 of the lid 13 is provided with a first positioning mark 34 that is used when the lid 13 is plugged and attached to the inner plug 11.

[0033] As shown in Figures 3 and 5, the stopper 11 has an attachment portion 40, an outlet portion 41 provided on the attachment portion 40, a detachment portion 42 that blocks the outlet portion 41 and is detachable from the outlet portion 41, a first sealing surface 44 that faces the tip of the inner tube 23 of the lid 13 in the plugging direction 15, an outer peripheral surface 45 that faces the inner peripheral surface 32 of the outer peripheral wall 22 of the lid 13, and a male thread 46 (an example of a second thread).

[0034] The mounting portion 40 has an outer cylinder portion 48, an inner cylinder portion 49, a top wall portion 50 formed to connect the upper end of the outer cylinder portion 48 with the upper end of the inner cylinder portion 49, and a mounting groove 51 surrounded by the outer cylinder portion 48, the inner cylinder portion 49, and the top wall portion 50. The mounting groove 51 is open downward and is formed around the entire circumference of the mounting portion 40. As shown in FIG. 2, the mouth 3 of the container 2 is fitted into the mounting groove 51 together with the protruding piece 4, whereby the inside plug 11 is attached to the container 2.

[0035] As shown in Figures 2, 3 and 5, the pouring part 41 has a cylindrical support tube 53 standing from the top wall part 50 and a cylindrical pouring tube 54 supported by the support tube 53, and is inserted into the inside of the inner tube 23 of the lid 13 from below. A male thread 46 is formed on the outer periphery of the support tube 53. The male thread 46 and the female thread 24 screw together. A first seal surface 44 is formed on the upper surface of the top wall part 50. The tip of the inner tube 23 of the lid 13 can freely come into contact with and separate from the first seal surface 44 in the axial direction 52 (up and down direction).

[0036] The detachable portion 42 has a cylindrical member 57 that is open at the top, and a bottom lid 58 that is provided on the bottom of the cylindrical member 57. The detachable portion 42 is surrounded by a breakable thin-walled weakened portion 59, and is provided inside the pouring tube 54 so as to be detachable via the weakened portion 59. When the weakened portion 59 breaks and the detachable portion 42 detaches from the inner plug 11, the inner bottom of the pouring tube 54 opens, and a pouring outlet (not shown) is formed in the inner bottom of the pouring tube 54.

[0037] A plurality of third engagement protrusions 60 protruding radially outward are formed on the outer periphery of the cylindrical member 57. A plurality of fourth engagement protrusions 61 protruding radially inward are formed on the inner periphery of the cylindrical member 57. As shown in FIG. 2, in a state in which the lid 13 is plugged and attached to the inner plug 11, the cylindrical member 57 is inserted between the first holding tube 27 and the second holding tube 28 of the lid 13 from below.

[0038] The first engaging protrusion 30 of the first retaining cylinder 27 is engageable with the third engaging protrusion 60 of the cylindrical member 57 in the rotation direction of the lid 13. The second engaging protrusion 31 of the second retaining cylinder 28 is engageable with the fourth engaging protrusion 61 of the cylindrical member 57 in the rotation direction of the lid 13.

[0039] 2, 3 and 7, the outer peripheral surface 45 of the mounting portion 40 of the inside plug 11 has a second seal surface 65 over the entire periphery, the second seal surface 65 being parallel to the axis 12 of the cap 10. The second seal surface 65 has a predetermined height H in the axial direction 52.

[0040] A seal portion 66 is formed around the entire circumference of the lower part of the inner circumferential surface of the outer circumferential wall 22 of the lid 13. The seal portion 66 protrudes inward in the radial direction from the inner circumferential surface 32 of the outer circumferential wall 22 in an arc shape, and contacts the second seal surface 65 around the entire circumference. Furthermore, as shown in Figures 7, 9 and 11, the seal portion 66 contacts the second seal surface 65 at a position away from the protruding piece 4 of the mouth portion 3 fitted into the mounting groove 51 in the opposite direction 16 (upward) to the plugging direction 15.

[0041] When the lid 13 is fitted to the inside plug 11, the position of the seal portion 66 moves in the axial direction 52 together with the lid 13 relative to the inside plug 11 depending on the deviation of the lid 13 in the rotational direction. The predetermined height H of the second seal surface 65 is set to be larger than the allowable deviation of the position of the seal portion 66 in the axial direction 52. The allowable deviation of the seal portion 66 is the deviation corresponding to the maximum allowable deviation (for example, 15° in the opening direction O or 15° in the closing direction S from the correct fitting position P) when the lid 13 deviates from the correct fitting position P (see FIG. 6) relative to the inside plug 11 in the rotational direction (the opening direction O shown in FIG. 8 or the closing direction S shown in FIG. 10).

[0042] 1 to 3 and 5, a flange 67 is provided on the outer periphery of the mounting portion 40 of the inside plug 11, protruding radially outward beyond the second seal surface 65. The flange 67 is formed below the second seal surface 65 and is connected to the lower end of the outer tubular portion 48 via a thin-walled portion 68. The flange 67 has a thin-walled knob portion 69.

[0043] When the capped container 1 is to be discarded after the liquid content of the capped container 1 has been consumed and the container 1 is emptied, the gripping portion 69 is pinched with the fingertips and pulled outward while being pulled in the circumferential direction, as shown by the imaginary lines in Figure 5, whereby the thin-walled portion 68 is torn in the circumferential direction and the flange portion 67 is severed from the outer tube portion 48. This allows the inside plug 11 to be easily removed from the mouth portion 3 of the container 2. As shown in FIG. 5, the inside plug 11 is provided with a second positioning mark 71 that is used when the lid 13 is attached to the inside plug 11 by plugging. A method for assembling the capped container 1 will be described below.

[0044] First, the inside stopper 11 and the lid 13 are produced separately, and then the inside stopper 11 is held using a jig (not shown) or the like with the pouring tube 54 facing upward as shown in Fig. 3, and the lid 13 is screwed downward from above the inside stopper 11. As a result, as shown in Fig. 2, the cylindrical member 57 of the inside stopper 11 is inserted and held between the first holding tube 27 and the second holding tube 28 of the lid 13 from below, the sealing tube 26 contacts the inner circumference of the tip of the pouring tube 54 over its entire circumference, the female thread 24 overcomes the male thread 46, the lid 13 is attached to the inside stopper 11, and the cap 10 is assembled.

[0045] At this time, as shown in Fig. 6, the position of the first mark 34 of the lid 13 is aligned with the position of the second mark 71 of the inner plug 11, so that the lid 13 is set in the correct plugging position P relative to the inner plug 11. When the lid 13 is plugged and attached to the inner plug 11 in this state, the plug is properly plugged, and the entire circumference of the tip of the inner tube 23 contacts the first seal surface 44 and the entire circumference of the seal portion 66 contacts the second seal surface 65, as shown in Fig. 7. In the correct plugging state, the tip of the inner tube 23 is pressed against the first seal surface 44 with a predetermined force.

[0046] Thereafter, the heat-sterilized liquid content is filled into container 2, and cap 10 is fitted onto mouth 3 of container 2 as shown in Fig. 2. As a result, mouth 3 is fitted into attachment groove 51 from below as shown in Fig. 7, and cap 10 is attached to container 2, and capped container 1 is assembled as shown in Fig. 1.

[0047] Then, the capped container 1 is cooled from the outside with cooling water. At this time, as shown in Fig. 7, the cooling water is sealed at two locations: a sealed location A between the seal portion 66 and the second sealing surface 65, and a sealed location B between the tip of the inner tube 23 and the first sealing surface 44. This makes it possible to reliably prevent the cooling water from entering the inside of the lid 13.

[0048] 8, if the position of the first mark 34 of the lid 13 deviates within the allowable range in the opening direction O from the position of the second mark 71 of the inner plug 11, the lid 13 will be set in a state shifted in the opening direction O from the normal plugging position P relative to the inner plug 11. If the lid 13 is plugged and attached to the inner plug 11 in this state, the position of the lid 13 will be shifted upward relative to the inner plug 11, resulting in a first plugging state, and the tip of the inner tube 23 will move away above the first sealing surface 44 as shown in FIG.

[0049] In this case, however, the seal portion 66 moves upward by an amount equal to the size of the gap 75, but as long as the movement is within the range of the allowable amount of movement, the seal portion 66 maintains contact with the second seal surface 65. As a result, the cooling water is sealed at the seal portion A between the seal portion 66 and the second seal surface 65, and the cooling water can be prevented from entering the inside of the lid 13.

[0050] Also, as shown in FIG. 10, when the position of the first mark 34 of the lid 13 deviates from the position of the second mark 71 of the inner plug 11 in the closing direction S within the allowable range, the lid 13 is set in a state where it is displaced from the normal plugging position P in the closing direction S relative to the inner plug 11. When the lid 13 is plugged and attached to the inner plug 11 in this state, the position of the lid 13 is shifted downward relative to the inner plug 11 in a second plugging state, and the tip of the inner tube 23 is pressed against the first seal surface 44 with an excessive force greater than the above-mentioned predetermined force, as shown in FIG. 11. In this case, the seal portion 66 moves downward together with the lid 13, but if it is within the range of the allowable amount of movement, it maintains a state of contact with the second seal surface 65. As a result, the cooling water is sealed at two places, namely, the seal portion 66 and the second seal surface 65 at the seal portion A and the seal portion B between the inner tube 23 and the first seal surface 44. This makes it possible to reliably prevent the cooling water from entering the inside of the lid 13.

[0051] 1, when the cap 10 is attached to the container 2, the mouth 3 of the container 2 is fitted into the attachment groove 51 of the inside plug 11 and the protruding piece 4 bites into the attachment groove 51, as shown in Fig. 7, so that the inside plug 11 is prevented from rotating in the circumferential direction relative to the mouth 3. This makes it possible to reliably prevent the inside plug 11 from rotating integrally with the lid 13 (rotating together) when the lid 13 is rotated in the opening direction O or the closing direction S.

[0052] In addition, since the protruding piece 4 of the mouth portion 3 bites into the mounting groove 51 as described above, the second seal surface 65 of the inside plug 11 may be slightly deformed in the radial direction at the position of the protruding piece 4 in the mounting groove 51. In contrast, the radial deformation of the second seal surface 65 decreases as the position moves away from the protruding piece 4 in the mounting groove 51 in the opposite direction 16 to the plugging direction 15 (upward). Therefore, as shown in Figures 7, 9, and 11, the seal portion 66 contacts the second seal surface 65 at a position away from the protruding piece 4 in the mounting groove 51 in the opposite direction 16 to the plugging direction 15, and is therefore less susceptible to the deformation of the second seal surface 65. As a result, the seal portion 66 reliably contacts the second seal surface 65 over the entire circumference, improving the sealing performance at the sealing point A.

[0053] After cooling the capped container 1 from the outside with cooling water, the user or the like turns the lid 13 in the opening direction O, whereby the first engaging protrusion 30 of the lid 13 engages with the third engaging protrusion 60 of the inner plug 11, the second engaging protrusion 31 of the lid 13 engages with the fourth engaging protrusion 61 of the inner plug 11, and the rotational torque of the lid 13 is transmitted to the detachable portion 42 of the inner plug 11 via the first to fourth engaging protrusions 30, 31, 60, 61, so that the weakened portion 59 breaks. As a result, the detachable portion 42 detaches from the inner plug 11 together with the lid 13, and a pouring outlet is formed at the inner bottom of the pouring tube 54. When the user or the like tilts the capped container 1, the liquid content in the container 2 is poured out to the outside through the pouring outlet. (Second embodiment)

[0054] In the first embodiment, as shown in Figures 7, 9 and 11, the sealing portion 66 is provided on the inner surface 32 of the outer wall 22 of the lid 13. However, in the second embodiment described below, as shown in Figures 12 to 14, the sealing portion 66 is provided on the outer surface 45 of the inside plug 11.

[0055] In this case, the sealing portion 66 contacts the inner surface 32 of the outer wall 22 of the lid 13 over the entire circumference in the normal plugging state shown in Figure 12, the first plugging state shown in Figure 13, and the second plugging state shown in Figure 14. This provides the same effects and advantages as those of the first embodiment described above.

[0056] In each of the above-described embodiments, as shown in FIG. 2, the axial direction 52 of the cap 10 is the up-down direction, but is not limited to the up-down direction. In each of the above embodiments, as shown in FIG. 3, a female thread 24 is given as an example of a first thread and a male thread 46 is given as an example of a second thread, but the male thread may be given as an example of a first thread and the female thread may be given as an example of a second thread. [Explanation of symbols]

[0057] 1 container with cap 2 containers 3 Mouth 4 prongs 10 Cap 11 Inner stopper 12 axis 13 Lid 15 Stoppering direction 16 Reverse direction 22 Outer wall 23 Inner cylinder 24 Female thread (first thread) 32 Inner surface 41 Pour section 44 First seal surface 45 Outer surface 46 Male thread (second thread) 51 Mounting groove 52 Axial direction 65 Second seal surface 66 Seal part 75 Gap

Claims

1. The container has an inner plug that is attached to the container, and a screw-type lid that can be attached to and detached from the inner plug by rotating the lid about an axis. A cap that is attached to an inner plug by fitting a lid, The lid is a cylindrical member that opens in the plugging direction, and has an outer peripheral wall, an inner tube provided inside the outer peripheral wall, and a first screw; The inner plug has a pouring portion, a first sealing surface facing a tip of the inner cylinder in a plugging direction, an outer peripheral surface facing an inner peripheral surface of the outer peripheral wall of the lid, and a second screw; The first screw and the second screw are screwed together, The spout is inserted into the inner cylinder. A tip of the inner cylinder is movable in contact with and away from the first seal surface in the axial direction, A seal portion is provided on either the inner peripheral surface of the outer peripheral wall of the lid or the outer peripheral surface of the inside plug, A cap characterized in that a sealing portion contacts the other of either the inner surface of the outer wall of the lid or the outer surface of the inner plug, both in a first plugging state in which a gap occurs between the tip of the inner tube and the first sealing surface, and in a normal plugging state in which the tip of the inner tube contacts the first sealing surface.

2. A first thread is formed on the inner circumference of the inner cylinder, 2. The cap according to claim 1, further comprising a second thread formed on an outer periphery of the spout portion.

3. 2. The cap according to claim 1, wherein the sealing portion is provided on an inner peripheral surface of an outer peripheral wall of the lid, protrudes radially inward from the inner peripheral surface of the outer peripheral wall, and contacts an outer peripheral surface of the inside plug.

4. The outer peripheral surface of the inside plug has a second sealing surface parallel to the axis of the cap, 4. The cap of claim 3, wherein the sealing portion abuts the second sealing surface.

5. A capped container comprising the cap according to claim 1 attached to a container, A plurality of protrusions are provided at the mouth of the container, protruding radially outward from the outer circumferential surface, A mounting groove is formed in the inner plug of the cap, The mouth of the container is fitted into the mounting groove together with the protrusion, A container with a cap, wherein the sealing portion contacts the other surface at a position away from the protruding piece in the mounting groove in the opposite direction to the plugging direction.

Images