JP2018193088A - cap - Google Patents

Abstract

To provide a cap which can make a turning force necessary for opening relatively small, and which can hold an upper lid favorably in an over-cap.SOLUTION: A cap includes: an inside plug 4; an upper lid 5; and an over-cap 6 engaged with the upper lid 5 and capable of integrally rotating. The inside plug 4 has: an inside plug body 10; and a separation part 12 provided separable from the inside plug body 10 via a weakened part 11. At the upper lid 5, an upper lid side projection rib 32 is provided which is engaged with the separation part 12 of the inside plug 4 when the upper lid 5 is rotated. At a side surface part lower end of the upper lid 5, a flange part 42 is formed spreading to the radially outside. The over-cap 6 includes: a cover part 51 on the upper lid 5 to cover; and a foot part 53 for holding extending downward from the cover part 51, and elastically deformable radially. At a lower end part of the foot part 53 for holding, an inside projection part 56 locked to a flange part 42 of the upper lid from below is formed.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a cap attached to a mouth of a container.

  Conventionally, this type of cap has an inner stopper attached to the mouth of the container and an upper lid that can be attached to and detached from the inner stopper by rotating, and the inner stopper is surrounded by a thin line that can be broken. Some have a region, and by attaching and rotating the upper lid to the inner plug, the thin line is broken, the removal region is fitted into the upper lid, and a spout is formed in the inner plug. According to this cap, when not in use, the inner plug attached to the mouth of the container can maintain a hermetically sealed state, which is hygienic.

  However, the size of the upper lid and the inner plug when viewed in plan does not change much (for example, both are substantially circular (the upper lid is substantially cylindrical), and its diameter does not change much), and the cutting that cuts the removal region If the dimensions are relatively large, a relatively large force (a large torque) must be applied to the top lid when the top lid is rotated to disengage the inner plug removal region.

  As a method of reducing the force at the time of cutting, for example, as disclosed in Patent Document 1, it is conceivable to cover an overcap having a diameter larger than that of the upper lid. In other words, with an overcap on the top cover, a locking part is provided that can be rotated together in the radial direction. When opening, the overcap is rotated, and the inner top cover is also rotated and removed. Try to cut the area. Thereby, the force (torque) which rotates the overcap at the time of opening can be made small, and workability | operativity becomes favorable.

JP2012-126402A

  However, in the configuration in which the overcap as disclosed in Patent Document 1 is placed on the upper lid, although the upper lid is held in the overcap by the frictional force that locks the overcap and the upper lid in the radial direction, In some cases, the upper lid may fall off from the overcap.

  SUMMARY OF THE INVENTION The present invention solves the above-described problems, and an object thereof is to provide a cap that can relatively reduce the rotational force necessary for opening, and at the same time, can favorably hold the upper lid in the overcap. Is.

  In order to solve the above-mentioned problems, the present invention provides an inner stopper attached to the mouth of a container, an upper lid that rotates and is attached to the inner stopper, and covers the upper lid when it is covered with the upper lid and rotated in the circumferential direction. An overcap that can rotate integrally with the inner cap, and the inner plug has an inner plug main body and a detachable portion that is detachable from the inner plug main body via the weakened portion. The cap is provided with a rotation engagement portion that engages with the detachment portion of the inner plug when the upper lid is rotated, and a flange portion that extends radially outward is formed at the lower end of the side surface portion of the upper lid. Are provided with a cover portion covering the upper lid and a holding foot portion extending downward from the cover portion and elastically deformable in the radial direction, and projecting radially inward at a lower end portion of the holding foot portion, On the other hand, when it is moved downward, it can be deformed radially outward to get over the flange. In, wherein the inner protrusion rides over the flange portion to engage from below the flange portion of the upper cover is formed.

  In this configuration, when the upper cap is attached to the inner cap and the overcap is put on the upper lid (the overcap is moved downward relative to the upper lid), the inner protrusion formed on the holding cap of the overcap is the upper lid. It can be locked from below by getting over the flange. Thereby, it can hold | maintain in the state which does not drop an upper cover with an overcap. In this state, the overcap is rotated and the upper lid is also rotated integrally, whereby the weakened portion of the inner plug can be cut and the detached portion can be detached, and a spout can be formed in the inner plug. At this time, since the overcap is rotated, the rotational force required for cutting the weakened portion can be made relatively small.

  Here, it is preferable that a plurality of holding feet are formed so as to extend downward from the cover portion of the overcap and to be provided with notches at appropriate intervals in the circumferential direction so as to expand radially outward. According to this configuration, the upper lid can be satisfactorily held without being dropped off by the overcap.

  Further, a plurality of outer ridges projecting radially outward are formed on the outer peripheral surface portion of the upper lid in the circumferential direction, and the upper cap is projected to the inner side in the radial direction and rotated in the circumferential direction relative to the upper lid. It is preferable that a plurality of inner ridges engaging with the outer ridges are formed in the circumferential direction.

  Further, the holding foot portion is provided so as to extend downward from the middle cylinder portion extending downward from the cover portion of the overcap, and the inner convex strip portion is provided on the inner surface of the upper portion of the notch portion in the middle cylinder portion. Is preferred.

  According to the cap of the present invention, a flange portion extending radially outward is formed at the lower end portion of the upper lid, the cover portion covering the upper lid on the overcap, and extending downward from the cover portion and elastically deformable in the radial direction. A holding foot is provided, and an inner protrusion that locks the flange of the upper lid from below is formed at the lower end of the holding foot so that the rotational force required when cutting the weakened portion can be made relatively small. At the same time, the upper lid can be held without being dropped by the overcap, and as a result, the reliability of the cap can be improved.

It is a partial notch front view of the cap which concerns on embodiment of this invention. It is a partial notch front view of the inner cap of the cap. It is a top view of the inner cap of the cap. It is a front view of the detached part of the inside plug in the cap. It is a partial notch front view of the upper cover of the cap. It is a top view of the upper cover of the cap. It is a bottom view of the upper lid of the cap. It is a partial notch front view of the overcap in the cap. It is a bottom view of the overcap of the cap. FIG. 10 is an enlarged sectional view taken along line AA in FIG. 9. It is a partial notch front view which shows the state which covers an upper cover on the inner stopper in the cap. It is a partial notch front view which shows the state which covers an overcap on the upper lid in the cap. It is the partially notched front view which shows the state which rotated after attaching the overcap in the cap once, and made the removal part detach | leave from an inside plug, and formed the spout. It is a partial notch front view of the cap which concerns on other embodiment of this invention. It is the perspective view seen from the slanting lower part of the overcap of the cap. It is a partial notch front view of the cap which concerns on other embodiment of this invention. It is the perspective view seen from the slanting lower part of the overcap of the cap. It is a partial notch front view of the cap which concerns on other embodiment of this invention.

DESCRIPTION OF EMBODIMENTS Hereinafter, caps according to embodiments of the present invention will be described with reference to the drawings.
In FIG. 1 etc., 1 is a cap attached to the container 2 in which the content (content liquid) is accommodated. The cap 1 is attached to the mouth 3 of the container 2, an upper lid 5 that is rotated and attached to the inner stopper, and is put on the upper lid 5 and engages with the upper lid 5 when rotated in the circumferential direction. And an overcap 6 that can rotate integrally. Each of the inner plug 4, the upper lid 5, and the overcap 6 is manufactured, for example, by injection molding with a synthetic resin, and has an elastically deformable property.

  As shown in FIGS. 1 to 4 and the like, the inner plug 4 includes an inner plug body 10 and a detachment portion 12 that is detachable from the inner plug body 10 via a weakening portion 11. The inner plug body 10 includes a nozzle portion 16 projecting upward from the center (the outer periphery of the weakening portion 11), a cylindrical outer cylinder portion 13 whose lower portion fits into the mouth portion 3 of the container 2, and an outer cylinder portion. A cylindrical inner cylinder portion 14 provided with a gap in the inner circumference of the container 13 and having a lower portion fitted into the mouth portion 3 of the container 2 from the inside, and upper end portions of the outer cylinder portion 13 and the inner cylinder portion 14, respectively. The upper surface portion 15 that extends radially inward and connects the outer cylinder portion 13 and the inner cylinder portion 14 and the like, protrudes in a stepped shape (cylindrical shape) above the inner peripheral end of the upper surface portion 15 and at the inner peripheral side portion. A stepped portion 17 or the like connected to the entire circumference of the nozzle portion 16 at a substantially central position in the height direction is formed.

  Further, below the outer cylindrical portion 13, a hook-like portion 18 that extends downward through the thin wall portion 19A and protrudes to the radially outer side and the inner peripheral side is formed on the entire circumference. By cutting the hook-like portion 18 from the vertical thin-walled groove portion 19B and the thin-walled portion 19A formed at one place of the hook-like portion 18, the inner plug 4 and the like are easily removed from the container 2. Further, a screw portion 20 is formed on the outer periphery of the step portion 17 of the inner plug main body 10 to be screwed into a screw portion 31 (see FIG. 1, FIG. 5, etc.) described later formed on the upper lid 5. A plurality of stopper portions 21 are formed on the upper surface portion 15 of the upper portion 15 so as to be gradually raised and come into contact with a regulation rib 43 (see FIGS. 5 and 7) formed on the upper lid 5 to recognize the rotational closed position of the upper lid. It is provided at a location (two locations in this embodiment).

  As shown in FIGS. 2 to 4 and the like, the detaching portion 12 of the inner plug 4 has a cylindrical central side surface portion 22 extending upward from the outer periphery of the weakened portion 11 and a portion slightly below the upper end portion of the central side surface portion 22. The top side sealing part 23 which closes the inner peripheral side of the center side part 22 is provided. Further, on the central side surface portion 22 of the detachment portion 12, a detachment portion side ridge rib 24 extending vertically in a state of protruding radially outward is provided at every predetermined angle in the circumferential direction (in this embodiment, every 60 degrees in the circumferential direction). A plurality of detachment-side protrusion ribs 24 are formed on the inner periphery of the central cylindrical portion 33 of the upper lid 5 at a predetermined angle in the circumferential direction (in this embodiment, every 60 degrees in the circumferential direction). The protrusion rib 32 (see FIGS. 5 and 7) can be engaged when the upper lid 5 is rotated in the circumferential direction with respect to the inner plug 4. Further, a concave portion 25 that is recessed toward the inner peripheral side is formed at an outer peripheral portion of a portion slightly below the upper end portion of the central side surface portion 22.

  As shown in FIGS. 1 and 5 to 7, the upper lid 5 includes a substantially circular top plate portion 36, a cylindrical side surface portion 37 depending from the outer peripheral edge of the top plate portion 36, and a top plate portion. A lid cylindrical portion 38 that hangs down from the inner peripheral side of the outer peripheral edge in 36, an inner cylindrical portion 39 that is further formed on the inner peripheral side of the lid cylindrical portion 38 and hangs down from the top plate portion 36, and an inner cylindrical portion 39 Furthermore, it has the central cylindrical part 33 etc. which are formed in the inner peripheral side and hang down from the top-plate part 36.

  The lower end of the lid cylindrical portion 38 can be brought into contact with the upper surface portion 15 of the inner plug 4 from above when the upper lid 5 is put on the inner plug 4. A threaded portion 31 that is screwed into the portion 20 is formed. The inner cylinder portion 39 comes into close contact with the nozzle portion 16 of the inner plug 4 from the inner peripheral side when the upper lid 5 is put on the inner plug 4.

  As described above, the central cylindrical portion 33 of the upper lid 5 has an upper lid side as a rotation engaging portion at every predetermined angle in the circumferential direction (as described above, every 60 degrees in the circumferential direction in this embodiment). A plurality of ridge ribs 32 are formed, and a central cylindrical base 34 is formed above the central cylindrical portion 33 of the upper lid 5 (the base of the central cylindrical portion 33). A convex portion 35 protruding to the peripheral side is formed. Then, when the upper lid 5 is put on the inner plug 4, the central cylindrical portion 33 of the upper lid 5 is fitted from the radially outer side to the central side surface portion 22 of the removing portion 12 of the inner plug 4, and the detached portion 12 of the inner plug 4. The convex portion 35 formed on the central cylindrical base portion 34 of the upper lid 5 is fitted into the concave portion 25 formed in the above.

  In addition, on the inner periphery of the side surface portion 37 of the upper lid 5, there are a plurality of restriction ribs 43 that can come into contact with the stopper portion 21 of the inner plug 4 when the upper lid 5 is closed with respect to the inner plug 4. (Two places in this embodiment).

  On the side surface portion 37 of the upper lid 5, an outer convex portion 41 that protrudes radially outward (in this embodiment, protrudes radially outward so as to have a saw blade shape in plan view) is provided in the circumferential direction. In addition, a plurality of continuous flange portions 42 are formed at the lower end of the side surface portion 37 so as to spread outwardly in a bowl shape. Further, in this embodiment, an inclined surface 42 a is formed on the upper portion of the flange portion 42 so as to gradually spread outward in the radial direction (radially outward) from the side surface portion 37.

  As shown in FIGS. 1, 8, 9, and the like, the overcap 6 includes a cover portion 51 that covers the upper lid 5, a middle cylinder portion 52 that extends in a cylindrical shape downward from the upper inside of the cover portion 51, A plurality of holding legs 53 that extend further downward from the middle cylinder part 52 (that is, extend downward from the cover part 51 via the middle cylinder part 52) and are elastically deformable, and radially inward from the middle cylinder part 52 And a plurality of inner ridges 54 that are engaged with the outer ridges 41 of the upper lid 5 are formed. In this embodiment, the cover portion 51 is composed of a flat disk-shaped top surface portion 51A and an outer peripheral surface portion 51B that gently spreads downward from the outer periphery of the top surface portion 51 and extends downward in a cylindrical shape. The diameter of the outer peripheral surface portion 51B is larger than the diameters of the upper lid 5 and the inner plug 4.

  Further, in this embodiment, the middle cylinder part 52 is provided so as to extend downward in a cylindrical shape from the connection part of the top surface part 51A and the outer peripheral surface part 51B in the cover part 51 or the vicinity thereof. Then, in the region below the middle tube portion 52, the long groove notches 55A and the short groove notches 55B are alternately provided for each appropriate angle in the circumferential direction, and the long groove notches 55A and the short groove notches 55B The portion between is a holding foot 53. That is, the positions of the lower end portions of all the holding foot portions 53 are substantially the same in the vertical direction, but the long groove cut portion 55A is cut to the upper side than the short groove cut portion 55B. The long groove notch portion 55A or the short groove notch portion 55B is provided between the adjacent holding foot portions 53 so that the holding foot portion 53 is elastic in the radial direction in a plan view. It can be deformed. Further, in this embodiment, the inner convex strip portion 54 is provided on the inner surface of the upper portion of the short groove cutout portion 55 </ b> B in the middle cylinder portion 52. That is, the short groove notch portion 55B and the inner ridge portion 54 are provided at positions overlapping in the radial direction in a plan view.

  As shown in an enlarged view in FIG. 10, the lower end of the holding foot 53 protrudes radially inward, and deforms outward when the overcap 6 is moved downward with respect to the upper lid 5, thereby deforming the upper lid 5. The inner projecting portion 56 is formed to be engaged with the flange portion 42 of the upper lid 5 from below when the flange portion 42 is overcome. In this embodiment, a lower inclined surface 56a is formed in the lower portion of the inner protrusion 56 so as to extend downward in the radial direction, and an upper inclined surface 56b that is extended outward in the radial direction is formed in the upper portion of the inner protrusion 56. Has been. In addition, a lower inclined surface 54a is formed at the lower end portion of the inner ridge portion 54 so as to expand downward in the radial direction (in this embodiment, expand in a shape that swells inward).

Next, the operation including the procedure for assembling the inner plug 4, the upper lid 5, and the overcap 6 in the cap 1 in the above configuration will be described.
First, the procedure for assembling the inner plug 4 and the upper lid 5 in the cap 1 will be described. After the inner plug 4 and the upper lid 5 are separately manufactured, the upper lid 5 is moved downward with respect to the inner plug 4 as shown in FIG. The upper lid 5 is attached to the inner plug 4 by moving (that is, moving in the direction of combining with each other along the axial direction X of the cap 1). At this time, a jig (not shown) is fitted into the inner plug 4, and the upper lid 5 is driven downward (driven) from the upper side of the inner plug 4.

  Thereby, in the lower region of FIG. 12, the inner cylinder portion 39 is shown so that the inner plug 4 and the upper lid 5 are assembled (however, FIG. 12 shows the assembled state of the overcap 6 after this). Is inserted inside the upper portion of the nozzle portion 16 of the inner plug 4, and the top plate portion 36 of the upper lid 5 comes into contact with the upper end surface of the detachable portion 12. In addition, the screw portion 31 of the upper lid 5 gets over the screw portion 20 of the inner plug 4, and the detachment portion 12 enters and is held in the central cylindrical portion 33, and the concave portion 25 provided at the distal end portion of the detachment portion 12. A convex portion 35 provided on the central cylindrical base portion 34 of the upper lid 5 is fitted. Further, the upper lid side ridge rib 32 is inserted between the detachable portion side ridge ribs 24, and the upper lid 5 is attached to the inner plug 4 in such a state.

  At this time, as shown in the lower region of FIG. 1 and FIG. 12, the top plate portion 36 of the upper lid 5 abuts on the upper end surface of the detachable portion 12 as described above. It is not inserted excessively between the detachable portion side rib ribs 24, and the tip of the upper lid side rib rib 32 abuts against the weakened portion 11 and is not broken.

  Next, as shown in FIG. 12, the overcap 6 is moved downward with respect to the upper lid 5 to which the inner plug 4 is assembled (that is, the upper lid 5 and the overcap along the axial direction X of the cap 1). 6 are moved in the direction of combining them with each other), and the overcap 6 is attached to the upper lid 5. At this time, the overcap 6 is plugged in (down) from above the upper lid 5 while maintaining a state where a jig (not shown) is inserted into the inner plug 4.

  Thereby, as shown in FIG. 1, the side surface portion 37 of the upper cap 5 is in contact with the side surface portion 37 and the outer convex portion 41 of the upper lid 5 while the inner convex portion 54 of the overcap 6 is in contact with the side surface portion 37 of the overcap 6. The inner ridge 54 of the overcap 6 is inserted between the outer ridge 41 formed on the side surface 37 of the upper lid 5 while being fitted into the holding foot 53 and the middle cylinder 52. When the overcap 6 is further plugged in (down) from above the upper lid 5, the inner projecting portion 56 formed on the holding foot 53 of the overcap 6 gets over the flange portion 42 of the upper lid 5, and the flange portion 42 is locked from below. As a result, the upper cap 5 can be held in a good state without falling off by the overcap 6. In this embodiment, the inclined surface 42a is formed on the flange portion 42 of the upper lid 5, and the lower inclined surface 56a (see FIG. 10) is formed on the inner projecting portion 56 of the overcap 6. The inner projecting portion 56 of the overcap 6 can easily get over the flange portion 42 of the upper lid 5.

  Then, in this state, when the overcap 6 is rotated around the axis (in this embodiment, the overcap 6 is rotated counterclockwise with respect to the upper lid 5 in plan view), the inside of the overcap 6 The protrusion 54 abuts on the outer protrusion 41 of the upper cover 5, the upper cover 5 is rotated together with the overcap 6, and the upper cover-side protrusion rib 32 is connected to the detachment-side protrusion rib 24 of the inner plug 4. In contact with the upper lid 5, the detaching portion 12 of the inner plug 4 is also integrally rotated. Thereby, the weakening part 11 of the inner plug 4 can be cut, and the detachment part 12 can be detached from the inner plug body 10, and the spout 26 (see FIG. 13) can be formed in the inner plug 4. At this time, since the overcap 6 having a large diameter is rotated, the rotational force required for opening can be reduced. That is, even when the cutting distance of the weakened portion 11 and the opening area of the spout 26 (see FIG. 13) are relatively large, the cutting can be performed without applying a large force.

  Here, as shown in FIGS. 8 to 10 and the like, the holding foot portion 53 extends from the cover portion 51 of the overcap 6 (in this embodiment, the connecting portion between the top surface portion 51A and the outer peripheral surface portion 51B). A plurality of cutout portions (long groove cutout portions 55A and short groove cutout portions 55B) are provided at appropriate intervals in the circumferential direction and extend in the radial direction through the cylindrical portion 52 so as to extend radially outward. (In particular, in this embodiment, a large number of holding foot portions 53 are provided via the long groove cut portions 55A and the short groove cut portions 55B), so that the upper cap 5 is satisfactorily removed by the overcap 6. Can hold.

  A plurality of outer ridges 41 projecting radially outward are formed on the side surface 37 of the upper lid 5 in the circumferential direction, and the overcap 6 projects radially inward and circumferentially with respect to the upper lid 5. Since a plurality of inner ridges 54 that engage with the outer ridges 41 of the upper lid 5 are formed in the circumferential direction when the upper cap 5 is rotated, the upper lid 5 is integrally rotated well when the overcap 6 is rotated. This is preferable.

  Further, in the present embodiment, since the inner ridge 54 is provided on the inner surface of the upper portion of the notch (short groove notch 55B) in the middle cylinder 52, the inner ridge 54 is relatively It can be made long and can be satisfactorily engaged with the outer ridge 41 of the upper lid 5, and at the same time, the holding foot 53 can be prevented from becoming difficult to deform in the radial direction, and the holding foot 53 makes it possible to get over the flange portion 42 satisfactorily.

  In this embodiment, since the overcap 6 is provided with the bottom surface portion 51A having a flat upper surface portion, the overcap is removed when the cap 1 is opened and the upper lid 5 and the overcap 6 are removed from the container 2. There is also an advantage that 6 can be stably placed on a table or the like.

  In the above embodiment, the groove-shaped notch 55A and the short groove notch 55B are provided between the holding legs 53 in the circumferential direction of the overcap 6, and these long groove notches 55A. In addition, although the case where a large number of holding foot portions 53 are provided via the short groove notches 55B has been described, the present invention is not limited to this. That is, as shown in FIGS. 14 and 15, a plurality of holding feet 53 are provided between the holding feet 53 in the circumferential direction via notches that are wide in the circumferential direction (wide notches 55C). May be.

  Further, it is not always necessary to provide the inclined surface 42a on the upper portion of the flange portion 42 provided on the upper lid 5, and as shown in FIGS. 14 and 15, the flange portion 42 is merely radially outward from the lower end of the side surface portion of the upper lid 5. You may form so that it may spread.

  Further, in the above-described embodiment, the inner protruding strip portion 54 is provided on the inner surface of the middle cylinder portion 52 that extends downward from the cover portion 51 of the overcap 6, and the holding foot portion extends further downward from the middle cylinder portion 52. 53 is provided. However, the present invention is not limited to this configuration, and as shown in FIGS. 16 and 17, the first middle cylinder portion 52 </ b> A extending downward from the cover portion 51 of the overcap 6 and the first middle portion in the cover portion 51 of the overcap 6. A second intermediate cylinder portion 52B extending downward from a location on the outer peripheral side of the location where the cylindrical portion 52A is connected, an inner convex strip portion 54 provided in the first intermediate cylinder portion 52A, and a second intermediate cylinder portion A holding foot 53 may be provided so as to extend downward from 52B. In this embodiment, the upper lid 5 is provided with a large-diameter side surface portion 37A extending further downward in the radial direction from the lower end portion of the side surface portion 37 provided with the outer ridge 41, and this large-diameter side surface portion 37A. The flange part 42 which just spreads radially outward from the lower end of this is provided.

  Moreover, in the said embodiment, although the case where 51 A of top surface parts with a flat upper surface part were provided as the cover part 51 of the overcap 6, it is not restricted to this, As shown in FIG. As the cover portion 51, a cover portion having a spherical surface portion 51C having a simple hemispherical shape and an outer peripheral surface portion 51B that gently follows the spherical surface portion 51C may be used. In addition, the middle cylinder 52 is preferably circular in plan view, but the cover 51 may have a square shape (such as a square or a hexagon) in plan view.

  In the above embodiment, the case where the upper cap 5 is used with the overcap 6 covered has been described. For example, when the spout is formed in the inner plug, the spout can be formed relatively easily. The cap can be configured with the inner plug 4 and the upper lid 5 having the above-described configuration without the overcap 6.

DESCRIPTION OF SYMBOLS 1 Cap 2 Container 3 Mouth part 4 Inner plug 5 Top cover 6 Overcap 10 Inner plug main body 11 Weaker part 12 Detachment part 13 Outer cylinder part 14 Inner cylinder part 16 Nozzle part 24 Separation part side rib 26 Outlet 32 Upper lid side protrusion Strip rib (rotating engagement part)
33 Central cylindrical portion 36 Top plate portion 37 Side surface portion 39 Inner cylindrical portion 41 Outer ridge portion 42 Flange portion 51 Cover portion 51A Top surface portion 51B Outer peripheral surface portion 52 Medium cylindrical portion 52A First intermediate cylindrical portion 52B Second intermediate cylindrical portion 53 Holding feet 54 Inner ridges 55A Long groove notches 55B Short groove notches 55C Wide notches 56 Inner protrusions

Claims (4)

An inner cap that is attached to the mouth of the container, an upper lid that is rotated and attached to the inner cap, and an overcap that is covered with the upper lid and can rotate integrally with the upper lid when rotated in the circumferential direction. The inner plug has an inner plug main body and a detachable portion that is detachable from the inner plug main body via the weakened portion, and the upper plug is detached when the upper lid is rotated. A cap provided with a rotation engaging portion that engages with the portion,
A flange that extends radially outward is formed at the lower end of the side of the upper lid,
The overcap is provided with a cover that covers the upper lid, and a holding foot that extends downward from the cover and is elastically deformable in the radial direction.
At the lower end of the holding foot, it protrudes radially inward, and when it is moved downward with respect to the upper lid, it can be deformed radially outward to get over the flange. A cap characterized in that an inner projecting portion for locking from below is formed.   The plurality of holding feet are formed so as to extend downward from the cover portion of the overcap, and are provided with notches at appropriate intervals in the circumferential direction so as to extend radially outward. The cap according to 1. A plurality of outer ridges projecting radially outward are formed on the side surface of the upper lid with respect to the circumferential direction,
The overcap is formed with a plurality of inner ridges in the circumferential direction that project radially inward and engage with the outer ridges of the upper lid when rotated in the circumferential direction with respect to the upper lid. The cap according to claim 2.   The holding foot portion is provided so as to extend downward from the middle tube portion extending downward from the cover portion of the overcap, and an inner convex portion is provided on the inner surface of the upper portion of the notch portion in the middle tube portion. The cap according to claim 3.

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