JP2013043691A - Cap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cap which is constituted so that an opening scheduled part can be removed by the opening operation of an upper cap and the removed opening scheduled part is not removed from the upper cap and even when a container is shaken in resealing, the liquid content does not intrude into the space between the upper cap and a spout nozzle and the inside of the cap is not soiled with the liquid content.SOLUTION: An upper cap-side annular wall 15 is formed on the inner top surface of the upper cap more on the inner side of an inner ring and an inner plug-side annular wall extending upward is formed on the upper surface of the opening scheduled part. In the cap, an engaging projection to be vertically engaged and a first engaging member and a second engaging member to be engaged in a peripheral direction when the upper cap is turned in plug opening direction, are formed on the inside or outside surface of the upper cap-side annular wall and the outside or inside surface of the inner plug-side annular wall, respectively. A flexible annular projection 32 extending outward and downward is formed in the outer peripheral part of the undersurface of the opening scheduled part 24 of an inner plug and the outside diameter of the tip of the annular projection is made larger than the diameter of a breakable weakened line.

Description

  The present invention relates to a cap that allows removal of a planned opening portion by an opening operation of the upper lid and prevents the removed planned opening portion from being detached from the upper lid, and more specifically, as in dressing. The present invention also relates to a cap in which the content liquid is effectively prevented from leaking into the space between the upper lid and the inner plug even when the content liquid is used after being shaken.

Conventionally, a cap consisting of an inner stopper that is fitted and fixed to the container mouth and has a planned opening at the top plate and an upper lid that covers the inner stopper is superior in liquid-tightness and pouring properties. It is used for the purpose of storing the contents.
In this type of cap, when opening the cap for the first time, the top lid is first removed from the container mouth, and then the pull tab formed on the planned opening portion defined by the weakening portion that can be broken is pulled up to be broken. By breaking the weakened portion and removing the planned opening portion, an opening for pouring is formed, and the content liquid can be taken out. Therefore, two steps are required until the contents liquid is taken out, and the removed opening needs to be discarded. Therefore, a cap that can be formed in one step and does not need to discard unnecessary parts is required. It has been.

  In order to solve such a problem, the present applicant, in a cap comprising an upper lid and an inner plug fitted and fixed to a container mouth portion formed with a planned opening portion, the inner surface of the top plate portion and the inner plug of the upper lid An annular wall is formed in each of the planned opening portions of the opening, and each annular wall has an engaging protrusion with which the upper lid and the inner plug can be engaged in the vertical direction, and the upper lid and the middle when the upper lid is turned in the opening direction. A cap in which a plurality of engaging members capable of engaging the stopper in the circumferential direction has been proposed (Patent Document 1). In this cap, when the upper lid is swung in the opening direction, the engaging members formed on the inner surface of the top plate portion of the upper lid and the annular wall of the planned opening portion of the inner plug are engaged, and as the upper lid is raised. Since the engaging projection engages in the vertical direction, the annular wall of the opening portion of the inner plug is pulled up. As a result, the shearing force in the circumferential direction and the pulling force in the vertical direction can be broken to partition the opening portion. The weakening line can be easily broken by acting on the weakening line, so that the dispensing opening can be reliably formed. Further, after the broken opening planned portion is removed from the inner plug, it does not come off with the upper lid, so that it is not necessary to discard the removed planned opening portion.

JP 2008-308218 A

In the cap described above, when the resealing is performed after removing the planned opening and forming the dispensing opening, the inner ring and the dispensing nozzle are pressure-bonded to ensure the liquid tightness of the container. After being removed from, the planned opening that is integrated with the upper lid does not block the dispensing opening again, but the content liquid enters the space formed by the upper lid and the dispensing nozzle, and the upper lid is removed. There was a problem that when the liquid was opened, the content liquid accumulated or adhered to the part, and the appearance was poor.
Therefore, an object of the present invention is to remove the planned opening by the opening operation of the upper lid, and in the cap in which the removed planned opening is not detached from the upper lid, the content liquid is removed from the upper lid and the lid at the time of resealing. It does not penetrate into the space formed by the dispensing nozzle and is shaken when resealing, especially when it is applied to contents that require shaking to mix the contents before use. Even so, it is to provide a cap in which the space formed by the upper lid and the dispensing nozzle is not contaminated with the content liquid.

  According to the present invention, it is composed of a top surface and a peripheral side wall depending from the outer peripheral portion of the top surface, the inner surface of the peripheral side wall is formed with a screw, and the inner surface is formed with an inner ring. And a top plate portion and a skirt portion depending from the outer peripheral edge of the top plate portion, and a dispensing nozzle is formed in the central portion of the top plate portion, and is defined by a weakening line that can be broken inside the dispensing nozzle. An inner stopper that is fitted and fixed to a container mouth portion formed with a planned opening portion, and an inner surface of the upper lid top surface includes an upper lid-side annular wall on the inner side of the inner ring, and the planned opening portion. Inner plug-side annular walls extending upward are formed on the upper surface, respectively, and the inner surface or outer surface of the upper lid-side annular wall and the outer surface or inner surface of the inner plug-side annular wall can be engaged vertically. Engageable in the circumferential direction when the upper lid is swung in the direction of protrusion and plug opening In the cap in which each of the first engaging member and the second engaging member is formed, a flexible annular protrusion extending outward and downward is formed on the outer peripheral portion of the lower surface of the opening portion of the inner plug. A cap is provided that is formed and has an outer diameter at the tip of the annular protrusion larger than the diameter of the breakable weakening line.

In the cap of the present invention,
1. In the state before opening, a gap is formed between the lower end of the upper lid side annular wall and the inner plug,
2. When the upper lid is resealed, the inner surface of the flexible annular projection comes into contact with the upper surface of the end of the opening formed in the inner plug and presses the planned opening at the lower end of the upper lid-side annular wall. Crimping the annular protrusion on the upper surface of the end of the dispensing opening;
3. An annular side wall having a screw portion that engages with a screw formed on the inner surface of the peripheral side wall of the upper lid is formed on the outer peripheral side of the nozzle for pouring the inner plug,
4). A screw formed on the inner surface of the peripheral side wall of the upper lid engages with a screw of the container mouth portion, and a tamper that engages with the container mouth portion via a breakable weakening portion at the lower end of the peripheral side wall of the upper lid. The evidence band is molded in one piece,
Is preferred.

  In the cap of the present invention, when forming the opening for taking out the content liquid, a flexible annular protrusion extending outward and downward on the lower surface outer peripheral portion of the planned opening portion to be removed from the inner plug, A flexible annular projection whose outer diameter at its tip is larger than the diameter of the weakening wire that can be broken, that is, the diameter of the opening edge, is formed. In this state, the planned opening portion covers the opening, and the flexible annular projection is pressed against the upper surface of the opening end edge of the inner plug, so that the opening can be completely closed without forming a gap. In addition, since the lower end of the upper lid side annular wall presses the portion where the flexible annular projection and the upper surface of the opening end edge of the inner plug come into contact, the pressure bonding between the flexible annular projection and the upper surface of the opening end edge of the inner plug is maintained. Even if the container is shaken up and down or left and right, the content liquid does not enter the space formed by the top lid and the dispensing nozzle, and the cap is effectively prevented from being contaminated with the content liquid. Yes.

Also, since the dispensing opening can be automatically formed in the inner plug when the top lid is opened for the first time, it is not necessary to form the dispensing opening after removing the top lid. The opening operation can be performed, and the planned opening portion removed from the inner plug is integrated with the upper lid and does not separate from the upper lid, so that it is not necessary to discard the removed planned opening portion again.
Furthermore, the circumferential engagement by the engagement member and the vertical engagement by the engagement protrusions allow a circumferential shearing force and an upward pulling force to be applied to the weakening line, thereby dividing the planned opening portion. It is possible to easily and reliably break the weakening line.

It is a figure which shows an example of the upper cover which comprises the cap of this invention, (A) Side sectional drawing, (B) is a bottom view. It is a figure which shows an example of the inner stopper which comprises the cap of this invention, (A) is a top view, (B) is a sectional side view, (C) is a bottom view. It is a sectional side view which shows the state which applied the cap formed by combining the upper cover shown in FIG. 1 and the inner stopper shown in FIG. 2 to the container mouth part. It is a sectional side view which shows the state which opens the cap shown in FIG. It is a sectional side view which shows the state which reseals the cap shown in FIG. FIG. 4 is a side sectional view showing a state where the cap shown in FIG. 3 is resealed. It is a partially expanded sectional view for demonstrating the other aspect of the cap of this invention. It is a figure which expands and shows the X section of FIG.

The cap of the present invention will be described with reference to the accompanying drawings.
As shown in FIG. 1, the upper cover denoted as 1 as a whole is located on the outer side of the top wall 10 and the peripheral side wall 11 depending from the outer periphery of the top surface 10, and the peripheral side wall 11, It consists of an outer wall 12 that covers the inner plug 2 from the outside, and an inner ring 13 that is positioned on the inner side of the circumferential side wall 11 and that is pressed against the inner surface of the inner nozzle for pouring of the inner plug to be described later. On the inner surface of the circumferential side wall 11, a screw portion 14 that is screw-engaged with an inner plug 2 described later is formed. Furthermore, four restricted portions 18 extending over an angle range of 90 degrees are formed on the lower end surface of the circumferential side wall 11. The lower surface of each of the restricted portions 18 is gradually inclined downward in the closing rotation direction of the upper lid 1, and a restricted end surface 19 that extends substantially vertically of each of the restricted portions 18 is defined.
In the cap of the present invention, it is an important feature that an upper lid side annular wall 15 is formed on the inner side of the inner ring 13, and this upper lid side annular wall 15 is formed on the upper inner surface of the inner plug 2 described later. And a plurality of first engaging members 17 that are engaged with the inner plug 2 (described later) in the circumferential direction are formed on the inner surface of the lower portion. Yes.

Further, as shown in FIG. 2, the inner plug generally indicated by 2 is composed of a top plate portion 20 and a skirt portion 21 depending from the outer peripheral edge of the top plate portion 20. Is formed, and a planned opening portion 24 defined by a weakening line 23 that can be broken inside the pouring nozzle 22 is formed. In addition, an annular side wall 26 in which a screw portion 25 that is an engaging portion with the upper lid 1 is formed outside the pouring nozzle 22 on the outer surface of the top plate portion 20 is formed. Furthermore, an annular engagement protrusion 27 is formed on the inner surface of the lower part of the skirt portion 21 to engage with an engagement protrusion of a container mouth portion, which will be described later, and to fit and fix the inner stopper 2 to the container mouth portion 4. Further, a seal cylinder portion 28 is formed on the inner surface side of the top plate portion 20 to secure the liquid tightness by pressure bonding to the inner surface of the container mouth portion.
An inner plug-side annular wall 29 is formed on the upper surface side of the planned opening portion 24, and an annular upper lid-side engagement of the upper lid-side annular wall 15 of the upper lid 1 is formed on the outer peripheral side upper portion of the inner plug-side annular wall 29. An annular inner plug-side engagement protrusion 30 that can be engaged with the protrusion 16 in the vertical direction is formed, and a first engagement of the upper lid-side annular wall 15 is formed on the outer peripheral side lower portion of the inner plug-side annular wall 29. A plurality of second engaging members 31 that can engage with the member 17 in the circumferential direction are formed.
Further, a flexible annular protrusion 32 is formed on the lower surface side of the planned opening portion 24 and extends outward and downward from the vicinity of the breakable weakening line 23. Four arc-shaped restricting portions 35 that extend over an angular range of 90 degrees in the circumferential direction are formed on the outer peripheral surface portion of the upper surface of the top plate portion 20 (region radially outside the annular side wall 26). The upper surface of each of the limiting portions 35 is inclined downward in the closing rotation direction of the upper lid 1, and the limiting end surface 36 that extends substantially vertically at the upstream end in the closing rotation direction of the upper lid 1 of each of the limiting portions 35. Is stipulated. The limiting end surface 36 of the limiting portion 35 formed on the outer peripheral edge of the upper surface of the top plate portion 20 of the inner plug 2 is on the limited end surface 19 of the limited portion 18 formed on the lower end surface of the circumferential side wall 11 of the upper lid 1. Located opposite to each other, this prevents the upper lid 1 from rotating with some play in the closing direction with respect to the inner plug 2.

FIG. 3 is a view showing a state in which the cap of the present invention comprising the combination of the upper lid 1 and the inner plug 2 described above is applied to the container mouth portion 4, and this container mouth portion 4 is formed on the outer peripheral surface of the skirt of the inner stopper 2. An engagement protrusion 40 that engages with the engagement protrusion 27 formed at the lower part of the inner surface of the portion 21 is formed.
As shown in FIG. 3, in the unopened state where the weakening line 23 is not broken, the inner plug 2 has the seal cylinder portion 28 crimped to the inner peripheral surface of the container mouth portion 4 and the inner plug skirt. The engagement protrusion 27 formed at the lower part of the inner surface of the portion 21 engages with the engagement protrusion 40 formed on the outer peripheral surface of the container mouth portion 4 so that the container mouth portion is firmly fitted. The liquid tightness is maintained until the outlet opening is formed.
In the upper lid 1, the screw portion 14 of the circumferential side wall 11 is engaged with the screw portion 25 formed on the annular side wall 26 of the inner plug, and the inner ring 13 is pressed against the inner surface of the dispensing nozzle 22 of the inner plug 2. ing.

  As is clear from FIG. 4, when the upper lid 1 is turned in the opening direction, the first engaging member 17 formed on the upper lid-side annular wall 15 and the inner plug-side annular wall are turned along with the turning of the upper lid 1. The second engaging member 31 formed at 29 is engaged in the circumferential direction, and the weakening line 23 defining the planned opening 24 is broken. When the weakening line is completely broken and the upper lid 1 is raised, the engagement protrusion 30 of the inner plug-side annular wall 29 and the engagement protrusion 16 of the upper lid-side annular wall 15 of the upper lid 1 are engaged in the vertical direction. The planned opening portion 24 detached from 2 is removed from the inner plug 2 together with the upper lid 1, and it is possible to reliably perform the dispensing opening 33 only by opening the upper lid.

5 and 6 are views for explaining a state where the cap once opened in this way is resealed. As shown in FIG. 5, when the upper lid 1 is turned in the closing direction, the upper lid-side annular wall 15 comes into contact with the upper surface of the planned opening portion 24, and the planned opening portion 24 is fitted in the dispensing opening 33. Move to. At this time, the flexible annular protrusion 32 is pressed by the lower end 15a of the upper lid-side annular wall 15 and pressed against the upper surface 34 of the opening end portion of the inner plug, and the tip is moved as the planned opening portion 24 moves downward. It is deformed so as to be positioned obliquely upward.
As shown in FIG. 6, in the state where the upper lid has completely swung, the planned opening portion 24 completely covers the outlet 33 for discharging the inner plug, and the upper surface of the planned opening portion 24 and the opening end portion. Since the flexible annular protrusion 32 functions as a packing between 34, no gap is formed, and the dispensing opening 33 can be reliably closed. For this reason, even if the container is shaken up and down or left and right in the resealed state, it is possible to effectively prevent the content liquid from leaking from the dispensing opening.
In this way, the flexible annular protrusion 32 is pressed against both between the upper lid side annular wall 15 and the upper surface 34 of the opening end to prevent the formation of a gap, and the upper lid is reliably turned to the closing position. As will be described later, a gap is formed between the lower end 15a of the upper lid-side annular wall 15 and the upper surface 24a of the planned opening 24 of the inner plug 2 at the closing position before opening shown in FIG. It is desirable to keep it. Here, the closing position before opening means that the limiting end surface 36 of the limiting portion 35 formed on the outer peripheral edge of the upper surface of the top plate portion 20 of the inner plug 2 is formed on the lower end surface of the peripheral side wall 11 of the upper lid 1. This corresponds to the position facing the restricted end surface 19 of the restricting portion 18.

The cap of the present invention is not limited to the embodiment shown in FIGS. 1 to 6, and various modifications can be made.
FIG. 7 is a partial side cross-sectional view for explaining another aspect of the cap of the present invention. In the cap of this aspect, no screw portion is formed on the peripheral side wall of the upper lid, and the outer wall 12 of the upper lid 1 is formed. A screw portion 14 is formed on the inner surface of the cap, and this screw portion 14 is the same as the cap of the present invention described above except that it engages with a screw portion 41 formed in the container mouth portion 4.
In the cap of this aspect, it is preferable to integrally form the tamper evidence band 5 having the third engagement member 52 on the inner surface through the weakened portion 51 that can be broken at the lower end of the outer wall 12. , By turning the upper lid in the direction of opening at the time of opening, the third engaging member 52 is engaged with the fourth engaging member 42 formed in the container mouth, whereby the weakened portion 51 is broken. By leaving the tamper evident band 5 at the container mouth, it is possible to clearly indicate that the tamper evidence band 5 has been opened once.

In FIG. 8 showing the X portion of FIG. 3 in an enlarged manner, in the present invention, as described above, the outer diameter D1 at the tip 32a of the flexible annular protrusion 32 formed on the lower surface of the planned opening portion 24 can be broken. It is important that the diameter of the weakening line 23 is larger than the diameter D2, that is, the diameter of the dispensing opening, whereby the flexible annular protrusion 32 is pressed against the upper surface 34 of the opening end during resealing, and It is possible to close the dispensing opening 33 without generating a gap.
The outer diameter D1 at the tip of the flexible annular protrusion with respect to the breakable weakening line diameter D2 cannot be generally defined by the thickness of the flexible annular protrusion, but is in the range of 0.3 ≦ D1-D2 ≦ 3. This is desirable in terms of both ease of pulling up the planned opening portion, that is, in terms of unsealing performance and securing liquid-tightness due to the planned opening portion at the time of resealing.
Further, in the present invention, as described above, at the closing position before opening, between the lower end 15a of the upper lid side annular wall 15 and the top plate portion 20 of the inner plug 2, in the specific examples shown in FIGS. A gap L is preferably formed between the lower end 15 a of the annular wall 15 and the outer side 24 a of the inner plug-side annular wall 29 on the upper surface of the planned opening portion 24. The distance of the gap L cannot be defined unconditionally depending on the thickness of the planned opening portion, the thickness and length of the flexible annular protrusion, etc., but is within the range of 0.2 ≦ L ≦ 1, so that it is allowed by the upper lid side annular wall. This is desirable in that the flexible annular projection can be reliably pressed and the dispensing opening can be closed without any gap at the planned opening.
Here, the closing position before opening means that the limiting surface 36 of the limiting portion 35 formed on the outer peripheral edge of the upper surface of the top plate portion 20 of the inner plug 2 is formed on the lower end surface of the circumferential side wall 11 of the outer lid 1. This corresponds to the position facing the restricted surface 19 of the restricted portion 18.

Furthermore, in the specific example shown in FIGS. 1 to 6, the first engagement member formed on the upper lid-side annular wall has a flap piece whose upper part is continuous with the annular wall and whose circumferential tip is in the opening direction. It is possible to reduce the resistance at the time of capping, but as having the same effect, a step portion and a thin portion extending downward from the step portion are formed in the lower portion of the upper lid side annular wall, You may provide the flap piece which follows the outer peripheral surface of this level | step-difference part and a thin part, and the front-end | tip of the circumferential direction extends outward toward the opening direction. Of course, a conventionally known engagement mechanism can also be adopted.
Further, in the annular walls formed on the upper lid and the inner plug, respectively, the first engaging member and the second engaging member are formed on the outer surface of the upper lid side annular wall and the inner surface of the inner stopper side annular wall, respectively. However, of course, the first engagement member and the second engagement member may be formed on the inner surface of the upper lid side annular wall and the outer surface of the inner plug side annular wall, respectively.
Furthermore, the shape of the breakable weakening line formed on the inner plug is not limited to a circular shape as in the specific example, and a conventionally known shape can be adopted.

The cap of the present invention is produced by molding the upper lid and the inner plug by a conventionally known molding method such as injection molding using a resin such as polyethylene or polypropylene, which has been used for a conventional plastic cap, and combining them. can do.
When the cap of the present invention is adapted to the container mouth, after checking whether the weakening line 23 of the inner stopper is damaged, the inner stopper and the upper lid are combined in advance, and these can be integrated into the container mouth. ,preferable. Moreover, after attaching an inner stopper to a container previously, an upper cover can also be attached.

  The cap of the present invention effectively prevents the inside of the space formed by the upper lid and the dispensing nozzle from being contaminated with the content liquid even if the container is shaken up and down or left and right during resealing after the dispensing opening is formed. Therefore, it can be effectively used as a cap applied to a container such as dressing which is essential to shake the container and mix the content liquid before use.

1 top lid, 2 middle stopper, 4 container mouth, 10 top surface, 11 circumferential side wall, 12 outer side wall,
13 inner ring, 14 screw part, 15 upper lid side annular wall, 16 upper lid side engaging projection, 17 first engaging member, 20 top plate part, 21 skirt part, 22 pouring nozzle, 23 breakable weakening line, 24 opening portion, 25 screw portion, 26 annular side wall, 27 engaging projection, 28 seal tube portion, 29 inner plug side annular wall, 30 inner plug side engaging projection, 31 second engaging member, 32 possible Flexible annular protrusion, 33 pouring opening, 34 upper surface of opening end.

Claims (5)

A top cover comprising a top surface and a peripheral side wall depending from the outer peripheral portion of the top surface, wherein an inner ring is formed on the inner surface of the top surface, and a screw is formed on the inner surface of the peripheral side wall; And a skirt portion hanging from the outer peripheral edge of the top plate portion, and a pouring nozzle is formed in the center portion of the top plate portion, and a planned opening portion partitioned by a weakening line that can be broken inside the pouring nozzle. It is composed of an inner stopper fitted and fixed to the formed container mouth part, on the inner surface of the upper lid top surface, on the inner side of the inner ring, on the upper lid side annular wall, and on the upper surface of the planned opening portion An extending inner plug-side annular wall is formed, and an inner surface or an outer surface of the upper lid-side annular wall and an outer protrusion or an inner surface of the inner plug-side annular wall can be engaged in an up-down direction and an opening direction. The first engagement that can be engaged in the circumferential direction when the upper lid is turned In cap member and the second engagement member are respectively formed,
A flexible annular projection extending outward and downward is formed on the outer peripheral portion of the lower surface of the planned opening portion of the inner plug, and the outer diameter at the tip of the annular projection is the diameter of the breakable weakening line. Cap characterized by being larger than.   The cap according to claim 1, wherein a gap is formed between a lower end of the upper lid side annular wall and an inner plug.   When the inner surface of the flexible annular projection reseals the upper lid, it contacts the upper surface of the end of the opening formed in the inner plug, and presses the planned opening at the lower end of the upper lid-side annular wall, The cap according to claim 1, wherein the flexible annular protrusion is pressure-bonded to the upper surface of the opening end.   4. An annular side wall having a screw portion that engages with a screw formed on the inner surface of the peripheral side wall of the upper lid is formed on the outer peripheral side of the inner plug pouring nozzle. The described cap.   A screw formed on the inner surface of the peripheral side wall of the upper lid engages with a screw of the container mouth portion, and a lower end of the peripheral side wall of the upper lid engages with the container mouth portion via a breakable weakening portion. The cap according to any one of claims 1 to 3, wherein a tamper evident band is integrally formed.

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