Cap

Abstract

To provide a cap capable of preventing falling of a detachment part from between the inner and outer holding barrels of a lid even when a container is mistakenly dropped in a closed state by removing the detachment part from an inside plug to form an outlet in the inside plug and rotating the lid in a closing direction to close it.SOLUTION: A cap 1 has an outlet 24 formed in an inside plug 4 by breaking a weakened part 13 to remove a detachment part 14 from the inside plug 4. The detachment 14 includes a first engagement 41b. A lid 5 includes an inner holding barrel 32, an outer holding barrel 33, and a second engagement 42b formed in the inner holding barrel 32. When the lid 5 is rotated in an opening direction, the second engagement 42b is engaged with the first engagement 41b, and the tip of the detachment part 14 and the root part of the inner holding barrel 32 are engaged via an engagement 25. The engagement 25 has an engagement recess 26, and an engagement projection 27 engaged with the engagement recess 26. The engagement projection 27 is formed in the inner holding barrel 32, and the engagement recess 26 is formed in the detachment part 14.SELECTED DRAWING: Figure 8

Description

[Technical field]

[0001] The present invention relates to a cap having an inside plug that is attached to a container and a screw-type lid that is detachable from the inside plug. [Background technology]

[0002] Conventionally, as shown in FIG. 28, for example, this type of cap has an inner stopper 103 attached to a container 102, a screw-type lid 104, and a cylindrical detachable portion 105, and when a weakened portion 119 formed around the periphery of detachable portion 105 breaks, detachable portion 105 becomes detached from inner stopper 103, forming a spout in inner stopper 103.

[0003] The lid 104 has an inner retaining tube 107 and an outer retaining tube 108, and when the lid 104 is closed, the detachable portion 105 is inserted between the inner retaining tube 107 and the outer retaining tube 108 of the lid 104, and the tip portion of the detachable portion 105 and the base portion of the outer retaining tube 108 fit together via the fitting portion 109.

[0004] As shown in Figures 28 and 29, a first outer circumference side engaging protrusion 111 is formed on the outer circumference of the detachment portion 105, a first inner circumference side engaging protrusion 112 is formed on the inner circumference of the detachment portion 105, a second inner circumference side engaging protrusion 113 is formed on the inner circumference of the outer retaining tube 108, and a second outer circumference side engaging protrusion 114 is formed on the outer circumference of the inner retaining tube 107.

[0005] As shown in FIG. 28, the fitting portion 109 has a recess 117 provided on the outer periphery of the tip portion of the detachment portion 105 and a protrusion 118 provided on the inner periphery of the base portion of the outer holding tube .

[0006] According to this, when opening the unopened cap 101 after fitting the lid 104 to the inside plug 103 as shown in Fig. 28, by rotating the lid 104 in the opening direction O as shown in Fig. 29, the second outer circumferential side engaging protrusion 114 comes into contact with the first inner circumferential side engaging protrusion 112 and the second inner circumferential side engaging protrusion 113 comes into contact with the first outer circumferential side engaging protrusion 111 as shown by the solid line in Fig. 30. As a result, the rotational torque generated when the lid 104 is rotated acts on the detachment portion 105 via the second inner circumferential side engaging protrusion 113 and the first outer circumferential side engaging protrusion 111 and the second outer circumferential side engaging protrusion 114 and the first inner circumferential side engaging protrusion 112, the weakened portion 119 breaks, the detachment portion 105 comes off the inside plug 103, and a spout is formed in the inside plug 103.

[0007] At this time, the detachment portion 105 is inserted between the inner retaining tube 107 and the outer retaining tube 108, and the convex portion 118 fits into the concave portion 117, so that the detachment portion 105 detached from the inner stopper 103 is held between the inner retaining tube 107 and the outer retaining tube 108 of the lid 104. The above-mentioned cap 101 is disclosed in the following patent document. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Patent No. 6941351 Summary of the Invention [Problem to be solved by the invention]

[0009] However, in the conventional type described above, when the lid 104 is turned in the opening direction O to detach the detachment portion 105 from the inner plug 103 and a spout is formed in the inner plug 103, and then the lid 104 is turned in the closing direction S to close the cap 101, if the container 102 is accidentally dropped onto a floor or the like in this closed state, the impact of the drop may cause the detachment portion 105 to bend radially inward 115 (see Figures 28 and 30), causing the convex portion 118 of the fitting portion 109 to detach from the concave portion 117, and causing the detachment portion 105 to fall off from between the inner retaining tube 107 and the outer retaining tube 108 of the lid 104.

[0010] To provide a cap which can prevent the detachable part from falling off from between the inner and outer retaining tubes of the lid due to the impact of the drop, even if the container is accidentally dropped in this closed state after the detachable part is detached from the inner plug and a spout is formed in the inner plug and the lid is turned in the closing direction to close the cap. [Means for solving the problem]

[0011] 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, The inner plug has a cylindrical detachment portion surrounded by a breakable weakened portion, A cap in which a spout is formed in the inner plug by breaking the weakened portion and separating the detachable portion from the inner plug, The release portion has a first engagement portion, The lid has an inner retaining tube and an outer retaining tube arranged in a double layer inside and outside, and a second engagement portion formed on at least one of the outer retaining tube and the inner retaining tube, With the lid closed, the detachable portion of the inner plug is inserted between the inner retaining tube and the outer retaining tube of the lid, When the cap is rotated in the opening direction, the second engagement portion engages with the first engagement portion in the opening direction, The tip of the detachment portion and the base of the inner holding tube are fitted together via a fitting portion. The fitting portion has a fitting recess and a fitting protrusion that fits into the fitting recess, One of the fitting convex portion and the fitting concave portion is formed on the outer periphery of the base portion of the inner holding cylinder, and the other is formed on the inner periphery of the tip portion of the separation portion.

[0012] According to this, after the lid is attached to the inner plug, when the unopened cap is opened, the second engagement part engages with the first engagement part by rotating the lid in the opening direction. As a result, the rotational torque generated when the lid is rotated acts on the detachment part via the second engagement part and the first engagement part, breaking the weakened part and causing the detachment part to detach from the inner plug, forming a spout in the inner plug.

[0013] At this time, the detachment portion is inserted between the inner retaining tube and the outer retaining tube, and the mating convex portion fits into the mating concave portion, so that the detachment portion that has detached from the center plug is held between the inner retaining tube and the outer retaining tube of the lid.

[0014] Thereafter, when the lid is turned in the closing direction to close the cap, and the container is accidentally dropped onto the floor or the like in this closed state, even if the detachable portion bends radially inward due to the impact of the drop, the fitting convex portion remains fitted into the fitting recess without coming off from the fitting recess because one of the fitting convex portion and the fitting recessed portion is formed on the outer periphery of the base portion of the inner retaining tube, and the other is formed on the inner periphery of the tip portion of the detachable portion. This makes it possible to prevent the detachable portion from falling off from between the inner retaining tube and the outer retaining tube of the lid due to the impact of the drop.

[0015] The cap in the second aspect of the present invention has an annular retaining groove formed between the inner retaining cylinder and the outer retaining cylinder, the removal portion has a tip surface that faces a rear end surface of the holding groove when inserted into the holding groove, An auxiliary fitting protrusion is provided on one of the end surfaces of the leading end surface of the release portion and the rear end surface of the holding groove, and an auxiliary fitting recess is provided on the other end surface, With the release portion inserted into the holding groove, the auxiliary fitting protrusion fits into the auxiliary fitting recess.

[0016] According to this, after opening an unopened cap, the lid is rotated in the closing direction to close the cap, and if the container is accidentally dropped onto the floor or the like in this closed state, the mating convex portion remains engaged with the mating recess, and the auxiliary mating convex portion engages with the auxiliary mating recess, thereby more reliably preventing the detachment portion from falling off from between the inner retaining tube and outer retaining tube of the lid due to the impact of the drop.

[0017] The third invention has 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 it, The inner plug has a cylindrical detachment portion surrounded by a breakable weakened portion, A cap in which a spout is formed in the inner plug by breaking the weakened portion and separating the detachable portion from the inner plug, The release portion has a first engagement portion, The lid has an inner retaining tube and an outer retaining tube arranged in a double layer inside and outside, and a second engagement portion formed on at least one of the outer retaining tube and the inner retaining tube, With the lid closed, the detachable portion of the inner plug is inserted between the inner retaining tube and the outer retaining tube of the lid, When the cap is rotated in the opening direction, the second engagement portion engages with the first engagement portion in the opening direction, The tip of the detachment portion and the base of the outer holding tube are fitted together via a fitting portion. The fitting portion has a fitting recess and a fitting protrusion that fits into the fitting recess, One of the fitting protrusion and the fitting recess is formed on the inner periphery of the base portion of the outer holding tube, and the other is formed on the outer periphery of the tip portion of the detachment portion, A protrusion that fills the gap between the inner periphery of the tip of the detachment portion and the outer periphery of the inner retaining tube is provided on the inner retaining tube or the detachment portion.

[0018] According to this, after the lid is attached to the inner plug, when the unopened cap is opened, the second engagement part engages with the first engagement part by rotating the lid in the opening direction. As a result, the rotational torque generated when the lid is rotated acts on the detachment part via the second engagement part and the first engagement part, breaking the weakened part and causing the detachment part to detach from the inner plug, forming a spout in the inner plug.

[0019] At this time, the detachment portion is inserted between the inner retaining tube and the outer retaining tube, and the mating convex portion fits into the mating concave portion, so that the detachment portion that has detached from the center plug is held between the inner retaining tube and the outer retaining tube of the lid.

[0020] If the lid is then rotated in the closing direction to close the cap, and the container is accidentally dropped onto the floor or the like in this closed state, even if the detachable portion tries to bend radially inward due to the impact of the drop, the protrusion fills the gap between the inner periphery of the tip of the detachable portion and the outer periphery of the inner retaining tube, preventing the detachable portion from bending radially inward. Therefore, the fitting convex portion is kept fitted into the fitting recess without coming off from the fitting recess, and this makes it possible to prevent the detachable portion from falling off from between the inner retaining tube and the outer retaining tube of the lid due to the impact of the drop.

[0021] The fourth invention has 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 it, The inner plug has a cylindrical detachment portion surrounded by a breakable weakened portion, A cap in which a spout is formed in the inner plug by breaking the weakened portion and separating the detachable portion from the inner plug, The release portion has a first engagement portion, The lid has an inner retaining tube and an outer retaining tube arranged in a double layer inside and outside, and a second engagement portion formed on at least one of the outer retaining tube and the inner retaining tube, With the lid closed, the detachable portion of the inner plug is inserted between the inner retaining tube and the outer retaining tube of the lid, When the cap is rotated in the opening direction, the second engagement portion engages with the first engagement portion in the opening direction, The tip of the detachment portion and the base of the outer holding tube are fitted together via a fitting portion. The fitting portion has a fitting recess and a fitting protrusion that fits into the fitting recess, One of the fitting protrusion and the fitting recess is formed on the inner periphery of the base portion of the outer holding tube, and the other is formed on the outer periphery of the tip portion of the detachment portion, An auxiliary fitting portion is provided at a location other than where the fitting portion is provided, The auxiliary fitting portion has a first auxiliary fitting portion provided on an inner periphery of the outer holding tube, The first auxiliary fitting portion fits onto the outer periphery of the release portion.

[0022] According to this, after the lid is attached to the inner plug, when the unopened cap is opened, the second engagement part engages with the first engagement part by rotating the lid in the opening direction. As a result, the rotational torque generated when the lid is rotated acts on the detachment part via the second engagement part and the first engagement part, breaking the weakened part and causing the detachment part to detach from the inner plug, forming a spout in the inner plug.

[0023] At this time, the detachable portion is inserted between the inner retaining tube and the outer retaining tube, the mating convex portion fits into the mating concave portion and the first auxiliary mating portion fits around the outer periphery of the detachable portion, so that the detachable portion detached from the middle plug is held between the inner retaining tube and the outer retaining tube of the lid.

[0024] The lid is then rotated in the closing direction to close the cap, and if the container is accidentally dropped onto a floor or the like in this closed state, even if the detachment portion bends radially inward due to the impact of the drop, as long as the detachment portion is maintained in at least one of the fitted states in which the engaging convex portion engages with the engaging recess and the fitted state in which the first auxiliary engaging portion engages with the outer periphery of the detachment portion, the detachment portion can be prevented from falling off from between the inner retaining tube and outer retaining tube of the lid due to the impact of the drop.

[0025] In the cap according to the fifth aspect of the present invention, the auxiliary fitting portion has a second auxiliary fitting portion provided on the outer periphery of the detachable portion, The first auxiliary fitting portion and the second auxiliary fitting portion are fitted together.

[0026] According to this, after opening an unopened cap, the lid is rotated in the closing direction to close the cap, and if the container is accidentally dropped onto a floor or the like in this closed state, even if the detachment portion bends radially inward due to the impact of the drop, as long as the detachment portion is maintained in at least one of the fitted states in which the engaging convex portion is engaged with the engaging recess and the fitted state in which the first auxiliary engaging portion and the second auxiliary engaging portion are engaged, the detachment portion can be prevented from falling off from between the inner retaining tube and outer retaining tube of the lid due to the impact of the drop. Effect of the Invention

[0027] As described above, according to the present invention, the detachable portion is detached from the inner plug and a spout is formed in the inner plug, and then the lid is rotated in the closing direction to close the plug. Even if the container is accidentally dropped in this closed state, the impact of the drop can be prevented from causing the detachable portion to fall off from between the inner and outer retaining tubes of the lid. [Brief description of the drawings]

[0028] [Figure 1] 1 is a cross-sectional view of a cap according to a first embodiment of the present invention. [Diagram 2] FIG. 4 is a cross-sectional view of the inner plug of the cap. [Diagram 3] FIG. [Figure 4] FIG. 4 is a cross-sectional view of the lid of the cap. [Diagram 5] FIG. [Figure 6] 2 is a cross-sectional view taken along the line AA in FIG. [Figure 7] 1 is an enlarged cross-sectional view showing the positional relationship between the first outer circumferential engaging portion, the first inner circumferential engaging portion, the second inner circumferential engaging portion, and the second outer circumferential engaging portion when the lid of the cap is rotated in the opening direction. FIG. [Figure 8] 4 is a cross-sectional view of the cap, showing the state in which the cap is opened and the detachable portion is detached from the inner plug. [Figure 9] FIG. 4 is an enlarged cross-sectional view of a fitting portion of the cap. [Figure 10] 4 is an enlarged cross-sectional view of a fitting protrusion provided on the lid of the cap. FIG. [Figure 11] 4 is an enlarged cross-sectional view of a fitting recess provided in a detachable portion of the cap. FIG. [Figure 12] 13 is an enlarged cross-sectional view of a fitting portion of a cap according to a second embodiment of the present invention. FIG. [Figure 13] 4 is an enlarged cross-sectional view of a fitting protrusion provided on the lid of the cap. FIG. [Figure 14] 4 is an enlarged cross-sectional view of a fitting recess provided in a detachable portion of the cap. FIG. [Figure 15] FIG. 11 is an enlarged cross-sectional view of a fitting portion of a cap according to a third embodiment of the present invention. [Figure 16] 4 is an enlarged cross-sectional view of a fitting protrusion provided on the lid of the cap. FIG. [Figure 17] 4 is an enlarged cross-sectional view of a fitting recess provided in a detachable portion of the cap. FIG. [Figure 18] FIG. 13 is an enlarged cross-sectional view of a fitting portion of a cap in a fourth embodiment of the present invention. [Figure 19] FIG. 13 is a partially enlarged cross-sectional view of a cap according to a fifth embodiment of the present invention. [Figure 20] FIG. 4 is an enlarged cross-sectional view of a portion of the lid of the cap. [Figure 21] FIG. 13 is a partially enlarged cross-sectional view of a cap according to a sixth embodiment of the present invention. [Figure 22] FIG. 4 is an enlarged cross-sectional view of a portion of the lid of the cap. [Diagram 23] FIG. 4 is a partially enlarged cross-sectional view of the inner plug of the cap. [Figure 24] FIG. 13 is a partially enlarged cross-sectional view of a cap according to a seventh embodiment of the present invention. [Diagram 25] FIG. 23 is a partially enlarged cross-sectional view of a cap according to an eighth embodiment of the present invention. [Figure 26] FIG. 4 is an enlarged cross-sectional view of a portion of the lid of the cap. [Figure 27] FIG. 4 is a partially enlarged cross-sectional view of the inner plug of the cap. [Figure 28] FIG. 1 is a cross-sectional view of a conventional cap. [Figure 29] 29 is a cross-sectional view taken along the line XX in FIG. 28. [Diagram 30] 1 is an enlarged cross-sectional view showing the positional relationship between the first outer circumferential engaging portion, the first inner circumferential engaging portion, the second inner circumferential engaging portion, and the second outer circumferential engaging portion when the lid of the cap is rotated in the opening direction. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0029] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. (First embodiment)

[0030] In the first embodiment, as shown in Fig. 1, reference numeral 1 denotes a cap, which has an inside plug 4 attached to an opening 3 of a container 2, and a screw-type lid 5 that can be attached and detached to the inside plug 4 by rotating it. The axial direction 6 of the cap 1 is defined as the up-down direction, the direction perpendicular to the axial center 7 of the cap 1 as the radial direction 8, and the circumferential direction about the axial center 7 as the circumferential direction 9.

[0031] As shown in Figures 1 to 3, the stopper 4 has a base portion 10 that is fitted into the mouth portion 3, a peripheral wall portion 11 provided on the base portion 10, a cylindrical pouring tube 12 provided on the peripheral wall portion 11, and a detachment portion 14 surrounded by a thin-walled breakable weakened portion 13. A mounting groove 16 is formed around the entire periphery of the base portion 10, and the mouth portion 3 is fitted into the mounting groove 16. A male thread 15 is formed on the outer circumferential surface of the peripheral wall portion 11.

[0032] The detachment portion 14 is located inside the pouring tube 12 and has a cylindrical portion 19 which is open at the top, a circular bottom wall portion 20 which closes the bottom of the cylindrical portion 19, and a first engagement portion 41 formed on the cylindrical portion 19. As shown in FIG. 8, when the cap 1 is opened, the weakened portion 13 breaks and the detachable portion 14 detaches from the inside plug 4, whereby a pouring outlet 24 is formed in the pouring cylinder 12.

[0033] 1, 4 and 5, the lid 5 has a circular top plate portion 30, a cylindrical skirt portion 31 hanging down from the outer periphery of the top plate portion 30, inner and outer cylindrical retaining tubes 32, 33 arranged doubly inside and outside, a cylindrical peripheral tube portion 34 with an open lower portion, a cylindrical closing tube portion 35 with an open lower portion, and a second engagement portion 42 formed on at least one of the inner retaining tube 32 and the outer retaining tube 33. The inner and outer retaining tubes 32, 33, the peripheral tube portion 34 and the closing tube portion 35 are inside the skirt portion 31 and are arranged concentrically about the axis 7.

[0034] An internal thread 38 that screws into the external thread 15 of the inner plug 4 is provided on the inner peripheral surface of the peripheral tube portion 34. As shown in Fig. 1, when the lid 5 is closed, the closing tube portion 35 is inserted into the tip of the pouring tube 12, and the gap between the lid 5 and the pouring tube 12 is sealed over the entire circumference via the closing tube portion 35, and the cylindrical portion 19 of the detachment portion 14 is inserted between the inner retaining tube 32 and the outer retaining tube 33 of the lid 5.

[0035] 1 to 3, the first engagement portion 41 has a plurality of first outer circumferential engagement portions 41a and a plurality of first inner circumferential engagement portions 41b. The first outer circumferential engagement portions 41a are formed on the outer periphery of the cylindrical portion 19 and protrude radially outward, with a plurality of (e.g., six) first outer circumferential engagement portions 41a being formed at predetermined angular intervals (e.g., 60°) in the circumferential direction 9.

[0036] The first inner peripheral engaging portions 41b are formed on the inner circumference of the cylindrical portion 19, protrude radially inward, and are formed in a plurality (for example, six) at predetermined angular intervals (for example, 60°) in the circumferential direction 9.

[0037] The first outer circumference side engaging portions 41a and the first inner circumference side engaging portions 41b are alternately arranged in the circumferential direction 9. That is, the first inner circumference side engaging portions 41b are located in the middle between the adjacent first outer circumference side engaging portions 41a in the circumferential direction 9, and the first outer circumference side engaging portions 41a are located in the middle between the adjacent first inner circumference side engaging portions 41b in the circumferential direction 9. As shown in FIGS. 1, 4 and 5, the second engagement portion 42 has a plurality of second inner circumference side engagement portions 42a and a plurality of second outer circumference side engagement portions 42b.

[0038] The second inner circumference side engaging portions 42a are formed on the inner circumference of the outer holding cylinder 33, protrude radially inward, and are formed in a plurality (for example, six) at predetermined angular intervals (for example, 60°) in the circumferential direction 9.

[0039] The second outer periphery side engaging portions 42b are formed on the outer periphery of the inner retaining cylinder 32, protrude radially outward, and are formed in a plurality (eg, six) at predetermined angular intervals (eg, 60°) in the circumferential direction 9.

[0040] The second inner circumference side engaging portions 42a and the second outer circumference side engaging portions 42b are alternately disposed in the circumferential direction 9. That is, the second inner circumference side engaging portions 42a are located in the middle between the adjacent second outer circumference side engaging portions 42b in the circumferential direction 9, and the second outer circumference side engaging portions 42b are located in the middle between the adjacent second inner circumference side engaging portions 42a in the circumferential direction 9.

[0041] As shown in Figures 1, 2, 4 and 9, the tip (upper end) portion of the cylindrical portion 19 of the detachment portion 14 and the base portion of the inner retaining tube 32 are fitted together via a fitting portion 25. As shown in Figures 9 to 11, the fitting portion 25 has a fitting recess 26 and a fitting protrusion 27 that fits into the fitting recess 26. The fitting recess 26 is formed over the entire inner circumference of the tip portion of the cylindrical portion 19 and is recessed outward in the radial direction 8. The fitting protrusion 27 is formed over the entire outer circumference of the base portion of the inner retaining tube 32 and protrudes outward in the radial direction 8.

[0042] As shown in Fig. 1, the lid 5 is attached to the inner plug 4 by being screwed from above down onto the inner plug 4. When the lid 5 is screwed onto the inner plug 4, as shown in Fig. 6, the second inner circumference side engaging portion 42a is inserted between adjacent first outer circumference side engaging portions 41a in the circumferential direction 9, and the second outer circumference side engaging portion 42b is inserted between adjacent first inner circumference side engaging portions 41b in the circumferential direction 9.

[0043] After the lid 5 is attached to the inner plug 4 as shown in Figure 1, when the lid 5 of the unopened cap 1 is rotated in the opening direction O, as shown in Figure 7, the second outer circumference side engagement portion 42b (second engagement portion 42) abuts against the first inner circumference side engagement portion 41b (first engagement portion 41) in the opening direction O, and the second inner circumference side engagement portion 42a (second engagement portion 42) abuts against the first outer circumference side engagement portion 41a (first engagement portion 41) in the opening direction O. The inside plug 4 and the lid 5 are made of resin. The resin used for the inside plug 4 and the resin used for the lid 5 have different hardness, and the lid 5 has a harder hardness than the inside plug 4. The operation of the above configuration will now be described.

[0044] The inner plug 4 and the lid 5 are manufactured, and the lid 5 is attached to the inner plug 4 in the correct position as shown in FIG. 1. As shown in FIG. 6, the second inner side engagement portion 42a is inserted between adjacent first outer side engagement portions 41a in the circumferential direction 9, and the second outer side engagement portion 42b is inserted between adjacent first inner side engagement portions 41b in the circumferential direction 9, thereby attaching the lid 5 to the inner plug 4.

[0045] After the cap 1 is sealed, when the unopened cap 1 is opened, the lid 5 is rotated in the opening direction O, so that the second outer peripheral side engagement portion 42b abuts against the first inner peripheral side engagement portion 41b and the second inner peripheral side engagement portion 42a abuts against the first outer peripheral side engagement portion 41a, as shown in Figure 7.

[0046] As a result, the rotational torque generated when the lid 5 is rotated in the opening direction O acts on the detachment portion 14 via the second inner side engagement portion 42a and the first outer side engagement portion 41a, and the second outer side engagement portion 42b and the first inner side engagement portion 41b, causing the weakened portion 13 to break and the detachment portion 14 to detach from the inner plug 4, forming a spout 24 in the inner plug 4 as shown in Figure 8.

[0047] At this time, as shown in Figures 8 and 9, the cylindrical portion 19 of the detachment portion 14 is inserted between the inner retaining tube 32 and the outer retaining tube 33, and the fitting convex portion 27 fits into the fitting recess 26, so that the detachment portion 14 detached from the inside plug 4 is held between the inner retaining tube 32 and the outer retaining tube 33 of the lid 5.

[0048] As described above, when the lid 5 of the unopened cap 1 is turned in the opening direction O to open the cap 1, and then the lid 5 is turned in the closing direction S to close the cap 1, if the container 2 is accidentally dropped onto the floor or the like in this closed state, even if the cylindrical portion 19 of the detachment portion 14 is bent inward 47 in the radial direction 8 (see Figures 1 and 9) due to the impact of the drop, as shown in Figure 10, the mating protrusion 27 is formed on the outer periphery of the base portion of the inner retaining tube 32, and as shown in Figure 11, the mating recess 26 is formed on the inner periphery of the tip portion of the cylindrical portion 19, the mating protrusion 27 will not come off from the mating recess 26, but will remain mated with the mating recess 26 as shown in Figure 9. This makes it possible to prevent the detachable portion 14 from falling off from between the inner retaining tube 32 and the outer retaining tube 33 of the lid 5 due to the impact of being dropped. (Second embodiment)

[0049] The second embodiment is a modification of the first embodiment, and similarly to the first embodiment, a fitting recess 26 and a fitting protrusion 27 are provided on the cap 1. As shown in Figs. 12 to 14, an annular retaining groove 51 is formed between the inner retaining tube 32 and the outer retaining tube 33. The cylindrical portion 19 of the detachment portion 14 has a tip surface 53 that faces (opposes) a rear end surface 52 of the retaining groove 51 when inserted into the retaining groove 51.

[0050] An auxiliary fitting protrusion 55 protruding upward is formed around the entire circumference on the tip end surface 53 of the cylindrical portion 19. An auxiliary fitting recess 56 recessed upward is formed around the entire circumference on the inner end surface 52 of the holding groove 51. As shown in Figure 12, when the cylindrical portion 19 of the release portion 14 is inserted into the holding groove 51, the auxiliary fitting protrusion 55 fits into the auxiliary fitting recess 56. The operation of the above configuration will now be described.

[0051] After opening an unopened cap 1, the lid 5 is rotated in the closing direction S to close the cap 1, and if the container 2 is accidentally dropped onto the floor or the like in this closed state, as shown in Figure 12, the mating convex portion 27 is kept engaged with the mating recess 26, and the auxiliary mating convex portion 55 is engaged with the auxiliary mating recess 56. Therefore, even if the cylindrical portion 19 is bent inward 47 in the radial direction 8 due to the impact of the drop, it is possible to more reliably prevent the detachment portion 14 from falling off from the retaining groove 51 (i.e., between the inner retaining tube 32 and the outer retaining tube 33).

[0052] In the above-described second embodiment, the auxiliary fitting recess 56 is formed on the rear end surface 52 of the retaining groove 51 as shown in FIG. 13, and the auxiliary fitting protrusion 55 is formed on the tip surface 53 of the cylindrical portion 19 as shown in FIG. 14. However, the auxiliary fitting recess 56 may be formed on the tip surface 53 of the cylindrical portion 19, and the auxiliary fitting protrusion 55 may be formed on the rear end surface 52 of the retaining groove 51.

[0053] In the above-described first and second embodiments, the fitting recess 26 is formed on the inner circumference of the tip portion of the cylindrical portion 19 as shown in FIGS. 2 and 14, and the fitting protrusion 27 is formed on the outer circumference of the base portion of the inner retaining tube 32 as shown in FIGS. 4 and 13, however, the fitting recess 26 may be formed on the outer circumference of the base portion of the inner retaining tube 32, and the fitting protrusion 27 may be formed on the inner circumference of the tip portion of the cylindrical portion 19.

[0054] In the above-mentioned first and second embodiments, the first outer circumferential engaging portion 41a is formed on the outer circumferential side of the cylindrical portion 19, the first inner circumferential engaging portion 41b is formed on the inner circumferential side of the cylindrical portion 19, the second inner circumferential engaging portion 42a is formed on the inner circumferential side of the outer holding tube 33, and the second outer circumferential engaging portion 42b is formed on the outer circumferential side of the inner holding tube 32. However, the cap may be formed with the first outer circumferential engaging portion 41a and the second inner circumferential engaging portion 42a, but not with the first inner circumferential engaging portion 41b and the second outer circumferential engaging portion 42b. Also, the cap may be formed with the first inner circumferential engaging portion 41b and the second outer circumferential engaging portion 42b, but not with the first outer circumferential engaging portion 41a and the second inner circumferential engaging portion 42a. (Third embodiment)

[0055] In the third embodiment, as shown in Figs. 15 to 17, the tip (upper end) portion of the cylindrical portion 19 of the detachment portion 14 and the root portion of the outer holding tube 33 are fitted together via a fitting portion 71. The fitting portion 71 has a fitting recess 72 and a fitting protrusion 73 that fits into the fitting recess 72. The fitting recess 72 is formed over the entire outer periphery of the tip portion of the cylindrical portion 19 and is recessed inward in the radial direction 8. The fitting protrusion 73 is formed over the entire inner periphery of the root portion of the outer holding tube 33 and protrudes inward in the radial direction 8.

[0056] A protrusion 76 that fills a gap 75 between the inner periphery of the tip of the cylindrical portion 19 of the detachment portion 14 and the outer periphery 32a of the root portion of the inner retaining tube 32 is provided around the entire outer periphery 32a of the root portion of the inner retaining tube 32. The protrusion 76 protrudes outward in the radial direction 8 from the outer periphery 32a of the root portion of the inner retaining tube 32. The operation of the above configuration will now be described.

[0057] After the lid 5 is fitted to the inner plug 4, when the unopened cap 1 is opened, the lid 5 is turned in the opening direction O, whereby the weakened portion 13 breaks and the detachment portion 14 detaches from the inner plug 4, forming a spout 24 in the inner plug 4 as shown in FIG. 8.

[0058] At this time, as shown in Figure 15, the cylindrical portion 19 of the detachment portion 14 is inserted between the inner retaining tube 32 and the outer retaining tube 33, and the mating convex portion 73 is engaged with the mating recess 72, so that the detachment portion 14 detached from the middle plug 4 is held between the inner retaining tube 32 and the outer retaining tube 33 of the lid 5.

[0059] As described above, when the lid 5 of the unopened cap 1 is turned in the opening direction O to open the cap 1, the lid 5 is turned in the closing direction S to close the cap 1, and the container 2 is accidentally dropped to the floor or the like in this closed state, even if the cylindrical portion 19 of the detachable portion 14 is about to bend toward the inside 47 in the radial direction 8 due to the impact of the drop, the protrusion 76 fills the gap 75 between the inner periphery of the tip of the cylindrical portion 19 of the detachable portion 14 and the outer periphery 32a of the base portion of the inner holding tube 32, so that the inner periphery of the tip of the cylindrical portion 19 comes into contact with the protrusion 76, and the tip of the cylindrical portion 19 is prevented from bending toward the inside 47 in the radial direction 8. Therefore, the fitting protrusion 73 is maintained in a state of being fitted into the fitting recess 72 without coming off from the fitting recess 72, and this makes it possible to prevent the detachable portion 14 from falling off between the inner holding tube 32 and the outer holding tube 33 of the lid 5 due to the impact of the drop.

[0060] In the above-described third embodiment, as shown in FIG. 16 , the protrusion 76 is provided on the outer periphery 32a of the root portion of the inner retaining tube 32, but it may be provided below the root portion of the inner retaining tube 32 and at a position corresponding to the fitting protrusion 73 in the radial direction 8.

[0061] In the above third embodiment, as shown in FIG. 15, the protrusion 76 contacts the inner circumference of the tip of the cylindrical portion 19, but the contact range of the protrusion 76 may be expanded further in the axial direction 6 (up and down direction) than the range 79 shown in FIG. 15. (Fourth embodiment)

[0062] The fourth embodiment is a modified example of the third embodiment, and as shown in FIG. 18 , protrusions 76, 77 that fill a gap 75 between the inner periphery of the tip of the cylindrical portion 19 of the detachment portion 14 and the outer periphery 32a of the inner retaining tube 32 are provided on the outer periphery 32a of the base portion of the inner retaining tube 32 and on the inner periphery of the tip of the cylindrical portion 19.

[0063] That is, one protrusion 76 is provided around the entire outer periphery 32a of the base portion of the inner retaining tube 32, and protrudes outward in the radial direction 8 from the outer periphery 32a of the inner retaining tube 32. The other protrusion 77 is provided around the entire inner periphery of the tip end of the cylindrical portion 19, and protrudes inward in the radial direction 8 from the inner periphery of the tip end of the cylindrical portion 19. One protrusion 76 has an auxiliary fitting portion 76a around its entire periphery, which fits into the other protrusion 77 from below. The operation of the above configuration will now be described.

[0064] When the lid 5 of an unopened cap 1 is turned in the opening direction O to open the cap 1, and then the lid 5 is turned in the closing direction S to close the cap 1, and the container 2 is accidentally dropped onto the floor or the like in this closed state, even if the cylindrical portion 19 of the detachment portion 14 attempts to bend inward 47 in the radial direction 8 due to the impact of the drop, the protrusions 76, 77 fill the gap 75 between the inner circumference of the tip of the cylindrical portion 19 of the detachment portion 14 and the outer circumference 32a of the base portion of the inner retaining tube 32, so that the tip of the cylindrical portion 19 is prevented from bending inward 47 in the radial direction 8. Furthermore, since the other protrusion 77 engages with the auxiliary fitting portion 76a of the one protrusion 76 from above in the axial direction 6, the fitting convex portion 73 is maintained fitted into the fitting recess 72 without coming off from the fitting recess 72, thereby preventing the detachment portion 14 from falling off from between the inner retaining tube 32 and the outer retaining tube 33 of the lid 5 due to the impact of being dropped.

[0065] In the above first to fourth embodiments, the first outer periphery side engaging portion 41a is formed on the outer periphery of the cylindrical portion 19, the first inner periphery side engaging portion 41b is formed on the inner periphery of the cylindrical portion 19, the second inner periphery side engaging portion 42a is formed on the inner periphery of the outer holding tube 33, and the second outer periphery side engaging portion 42b is formed on the outer periphery of the inner holding tube 32, but the cap may be formed with the first outer periphery side engaging portion 41a and the second inner periphery side engaging portion 42a but not with the first inner periphery side engaging portion 41b and the second outer periphery side engaging portion 42b. Also, the cap may be formed with the first inner periphery side engaging portion 41b and the second outer periphery side engaging portion 42b but not with the first outer periphery side engaging portion 41a and the second inner periphery side engaging portion 42a. (Fifth embodiment)

[0066] 19 and 20, in the fifth embodiment, a fitting recess 72 is formed over the entire outer periphery of the tip portion of a cylindrical portion 19. A fitting protrusion 73 is formed over the entire inner periphery of a base portion of an outer holding tube 33.

[0067] An auxiliary fitting portion 85 is provided at a location other than where the fitting portion 71 (i.e., the fitting recess 72 and the fitting protrusion 73) is provided. The auxiliary fitting portion 85 has a first auxiliary fitting portion 86 provided on the inner circumference of the outer holding tube 33. The first auxiliary fitting portion 86 is a protrusion having a mountain-shaped cross section that protrudes inward in the radial direction 8 from the inner circumference of the outer holding tube 33, and is formed at multiple locations in the axial direction 6 (vertical direction) (for example, three locations, one above and one below, in Figs. 19 and 20). The first auxiliary fitting portion 86 extends in the circumferential direction 9 of the outer holding tube 33, except for the location where the second inner circumference side engagement portion 42a is formed.

[0068] As shown in Figure 19, when the lid 5 is attached to the inner plug 4 by tapping it onto it, the first auxiliary fitting portion 86 bites into and fits into the outer edge of the first outer periphery side engagement portion 41a of the cylindrical portion 19 of the detachment portion 14 (corresponding to the outer periphery of the detachment portion 14). The operation of the above configuration will now be described.

[0069] After the lid 5 is fitted to the inner plug 4, when the unopened cap 1 is opened, the lid 5 is turned in the opening direction O, whereby the weakened portion 13 breaks and the detachment portion 14 detaches from the inner plug 4, forming a spout 24 in the inner plug 4 as shown in FIG. 8.

[0070] At this time, as shown in Figure 19, the cylindrical portion 19 of the detachment portion 14 is inserted between the inner retaining tube 32 and the outer retaining tube 33, and the mating convex portion 73 is engaged with the mating recess 72, so that the detachment portion 14 detached from the inner plug 4 is held between the inner retaining tube 32 and the outer retaining tube 33 of the lid 5.

[0071] As described above, when the lid 5 of the unopened cap 1 is turned in the opening direction O to open the cap 1, and then the lid 5 is turned in the closing direction S to close the cap 1, and the container 2 is accidentally dropped onto a floor or the like in this closed state, even if the cylindrical portion 19 of the detachment portion 14 is bent toward the inside 47 in the radial direction 8 due to the impact of the drop, as long as at least one of the fitted states in which the engaging convex portion 73 is engaged with the engaging concave portion 72 and the fitted state in which the first auxiliary engaging portion 86 is bitten into the first outer peripheral engaging portion 41a of the cylindrical portion 19 of the detachment portion 14 is maintained, it is possible to prevent the detachment portion 14 from falling off from between the inner retaining tube 32 and the outer retaining tube 33 of the lid 5 due to the impact of the drop. (Sixth embodiment)

[0072] In the sixth embodiment, as shown in Figures 21 to 23, the auxiliary fitting portion 85 has a first auxiliary fitting portion 86 provided on the inner circumference of the tip portion of the outer retaining tube 33, and a second auxiliary fitting portion 87 provided on the outer circumference of the cylindrical portion 19 of the detachment portion 14.

[0073] As shown in FIG. 22, the first auxiliary fitting portion 86 is a protrusion having a semicircular cross-section that protrudes inward in the radial direction 8 from the inner circumference of the tip portion (lower end portion) of the outer retaining tube 33, and is formed around the entire circumference.

[0074] As shown in FIG. 23, the second auxiliary fitting portion 87 is formed at the lower end of the first outer periphery side engaging portion 41a, and is a recess recessed inward in the radial direction 8 from the outer edge of the first outer periphery side engaging portion 41a. As shown in FIG. 21, in a state in which the lid 5 is attached to the inside plug 4 by being plugged, the first auxiliary fitting portion 86 fits into the second auxiliary fitting portion 87 . The operation of the above configuration will now be described.

[0075] When the lid 5 of an unopened cap 1 is turned in the opening direction O to open the cap 1, and then the lid 5 is turned in the closing direction S to close the cap 1, and the container 2 is accidentally dropped onto a floor or the like in this closed state, even if the cylindrical portion 19 of the detachment portion 14 is bent toward the inside 47 in the radial direction 8 due to the impact of the drop, as long as at least one of the fitted states in which the engaging convex portion 73 is engaged with the engaging concave portion 72 and the fitted state in which the first auxiliary engaging portion 86 is engaged with the second auxiliary engaging portion 87 is maintained as shown in Figure 21, it is possible to prevent the detachment portion 14 from falling off from between the inner retaining tube 32 and the outer retaining tube 33 of the lid 5 due to the impact of the drop. (Seventh embodiment)

[0076] The seventh embodiment is a modification of the sixth embodiment, and as shown in Fig. 24, the first auxiliary fitting portion 86 is a protrusion having a mountain-shaped cross section that protrudes inward in the radial direction 8 from the inner circumference of the tip end (lower end) of the outer holding tube 33, and is formed over the entire circumference. The second auxiliary fitting portion 87 is formed at the lower end of the first outer periphery side engaging portion 41a.

[0077] According to this, when the lid 5 of an unopened cap 1 is turned in the opening direction O to open the cap 1, and then the lid 5 is turned in the closing direction S to close the cap 1, and the container 2 is accidentally dropped onto a floor or the like in this closed state, even if the cylindrical portion 19 of the detachment portion 14 is bent toward the inside 47 in the radial direction 8 due to the impact of the drop, as long as at least one of the fitted states in which the engaging convex portion 73 is engaged with the engaging concave portion 72 and the fitted state in which the first auxiliary engaging portion 86 is engaged with the second auxiliary engaging portion 87 from below is maintained, as shown in Figure 24, it is possible to prevent the detachment portion 14 from falling off from between the inner retaining tube 32 and the outer retaining tube 33 of the lid 5 due to the impact of the drop. (Eighth embodiment)

[0078] The eighth embodiment is a modified example of the sixth embodiment, and as shown in Figures 25 to 27, the auxiliary fitting portion 85 has a first auxiliary fitting portion 86 provided on the inner circumference of the outer retaining tube 33 and a second auxiliary fitting portion 87 provided on the outer circumference of the cylindrical portion 19 of the detachment portion 14.

[0079] As shown in FIG. 26, the first auxiliary fitting portion 86 is a protrusion that protrudes inward in the radial direction 8 from the inner circumference of the outer retaining tube 33, and extends in the circumferential direction 9 of the outer retaining tube 33 except for the location where the second inner circumference side engagement portion 42a is formed.

[0080] As shown in FIG. 27, the second auxiliary fitting portion 87 is formed on the first outer periphery side engaging portion 41a, and is a protrusion protruding outward in the radial direction 8 from the outer edge of the first outer periphery side engaging portion 41a. As shown in FIG. 25, in a state in which the lid 5 is attached to the inside plug 4 by tapping, the second auxiliary fitting portion 87 fits into the first auxiliary fitting portion 86 from above. The operation of the above configuration will now be described.

[0081] When the lid 5 of an unopened cap 1 is turned in the opening direction O to open the cap 1, and then the lid 5 is turned in the closing direction S to close the cap 1, and the container 2 is accidentally dropped onto a floor or the like in this closed state, even if the cylindrical portion 19 of the detachment portion 14 is bent inward 47 in the radial direction 8 due to the impact of the drop, as long as at least one of the fitted states in which the engaging convex portion 73 is engaged with the engaging concave portion 72 and the fitted state in which the second auxiliary engaging portion 87 is engaged with the first auxiliary engaging portion 86 from above is maintained, as shown in Figure 25, it is possible to prevent the detachment portion 14 from falling off from between the inner retaining tube 32 and the outer retaining tube 33 of the lid 5 due to the impact of the drop.

[0082] In the above third to eighth embodiments, the fitting recess 72 is formed on the outer periphery of the tip portion of the cylindrical portion 19 of the detachment portion 14, and the fitting protrusion 73 is formed on the inner periphery of the base portion of the outer retaining tube 33, but the fitting recess 72 may be formed on the inner periphery of the base portion of the outer retaining tube 33, and the fitting protrusion 73 may be formed on the outer periphery of the tip portion of the cylindrical portion 19.

[0083] In the above fifth to eighth embodiments, the first outer periphery side engagement portion 41a is formed on the outer periphery of the cylindrical portion 19, the first inner periphery side engagement portion 41b is formed on the inner periphery of the cylindrical portion 19, the second inner periphery side engagement portion 42a is formed on the inner periphery of the outer retaining tube 33, and the second outer periphery side engagement portion 42b is formed on the outer periphery of the inner retaining tube 32, but the cap may be formed with the first outer periphery side engagement portion 41a and the second inner periphery side engagement portion 42a, but not with the first inner periphery side engagement portion 41b and the second outer periphery side engagement portion 42b. [Explanation of symbols]

[0084] 1 Cap 2 containers 4 Inner stopper 5 Lid 13 Weakened part 14 Detachment section 24 spout 25 Fitting part 26 Fitting recess 27 Fitting protrusion 32 Inner holding tube 33 Outer holding tube 41 First engagement portion 42 Second engagement portion 51 Retaining groove 52 Back end surface 53 Tip surface 55 Auxiliary fitting protrusion 56 Auxiliary fitting recess 71 Fitting part 72 Fitting recess 73 Fitting protrusion 75 Gap 76,77 Protrusion 85 Auxiliary fitting part 86 First auxiliary fitting part 87 Second auxiliary fitting O Opening direction

Claims

1. The container has an inner plug attached to the container and a screw-type lid that can be attached to and detached from the inner plug by rotating the lid. The inner plug has a cylindrical detachment portion surrounded by a breakable weakened portion, A cap in which a spout is formed in the inner plug by breaking the weakened portion and separating the detachable portion from the inner plug, The release portion has a first engagement portion, The lid has an inner retaining tube and an outer retaining tube arranged in a double layer inside and outside, and a second engagement portion formed on at least one of the outer retaining tube and the inner retaining tube, With the lid closed, the detachable portion of the inner plug is inserted between the inner retaining tube and the outer retaining tube of the lid, When the cap is rotated in the opening direction, the second engagement portion engages with the first engagement portion in the opening direction, The tip of the detachment portion and the base of the inner holding tube are fitted together via the fitting portion. The fitting portion has a fitting recess and a fitting protrusion that fits into the fitting recess, A cap characterized in that one of a mating protrusion and a mating recess is formed on the outer periphery of a base portion of an inner retaining tube, and the other is formed on the inner periphery of a tip portion of a removal portion.

2. An annular retaining groove is formed between the inner retaining cylinder and the outer retaining cylinder, the removal portion has a tip surface that faces a rear end surface of the holding groove when inserted into the holding groove, An auxiliary fitting protrusion is provided on one of the end surfaces of the leading end surface of the release portion and the rear end surface of the holding groove, and an auxiliary fitting recess is provided on the other end surface, 2. The cap according to claim 1, wherein the auxiliary fitting protrusion fits into the auxiliary fitting recess with the release portion inserted into the retaining groove.

3. The container has an inner plug attached to the container and a screw-type lid that can be attached to and detached from the inner plug by rotating the lid. The inner plug has a cylindrical detachment portion surrounded by a breakable weakened portion, A cap in which a spout is formed in the inner plug by breaking the weakened portion and separating the detachable portion from the inner plug, The release portion has a first engagement portion, The lid has an inner retaining tube and an outer retaining tube arranged in a double layer inside and outside, and a second engagement portion formed on at least one of the outer retaining tube and the inner retaining tube, With the lid closed, the detachable portion of the inner plug is inserted between the inner retaining tube and the outer retaining tube of the lid, When the cap is rotated in the opening direction, the second engagement portion engages with the first engagement portion in the opening direction, The tip of the detachment portion and the base of the outer holding tube are fitted together via a fitting portion. The fitting portion has a fitting recess and a fitting protrusion that fits into the fitting recess, One of the fitting protrusion and the fitting recess is formed on the inner periphery of the base portion of the outer holding tube, and the other is formed on the outer periphery of the tip portion of the detachment portion, A cap characterized in that a protrusion for filling a gap between an inner periphery of a tip of the detachable portion and an outer periphery of the inner retaining tube is provided on the inner retaining tube or the detachable portion.

4. The container has an inner plug attached to the container and a screw-type lid that can be attached to and detached from the inner plug by rotating the lid. The inner plug has a cylindrical detachment portion surrounded by a breakable weakened portion, A cap in which a spout is formed in the inner plug by breaking the weakened portion and separating the detachable portion from the inner plug, The release portion has a first engagement portion, The lid has an inner retaining tube and an outer retaining tube arranged in a double layer inside and outside, and a second engagement portion formed on at least one of the outer retaining tube and the inner retaining tube, With the lid closed, the detachable portion of the inner plug is inserted between the inner retaining tube and the outer retaining tube of the lid, When the cap is rotated in the opening direction, the second engagement portion engages with the first engagement portion in the opening direction, The tip of the detachment portion and the base of the outer holding tube are fitted together via a fitting portion. The fitting portion has a fitting recess and a fitting protrusion that fits into the fitting recess, One of the fitting protrusion and the fitting recess is formed on the inner periphery of the base portion of the outer holding tube, and the other is formed on the outer periphery of the tip portion of the detachment portion, An auxiliary fitting portion is provided at a location other than where the fitting portion is provided, The auxiliary fitting portion has a first auxiliary fitting portion provided on an inner periphery of the outer holding tube, A cap, characterized in that the first auxiliary fitting portion fits onto the outer periphery of the detachable portion.

5. The auxiliary fitting portion has a second auxiliary fitting portion provided on an outer periphery of the detachment portion, The cap according to claim 4, wherein the first auxiliary fitting portion and the second auxiliary fitting portion are fitted together.

Images