JP2017165421A - Easy-open container lid - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an easy-open container lid with simple structure capable of suppressing force of a content liquid blasting out together with a gas in a container without unexpectedly unfastening from the container when opening.SOLUTION: An easy-open container lid 100 has a shell 110 in which a cap top surface 111, a skirt wall 113 and a tab 130 are formed, and has a disc-shaped liner 120 on the inner face of the cap top surface 111. The shell 110 further has a pair of scores 112 extending upward on the skirt wall 113 from both sides of the tab 130, and the vent holes 114 penetrating the skirt wall 113 in a radial direction are provided on the skirt wall 113.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an easily openable container lid that is placed on the mouth of a container such as a bottle and attached to the mouth by crimping the outer surface.

  Conventionally, a metal cap provided with a resin tab having a ring-shaped gripping part that can be put on a finger as an easy-open container lid to be attached to the mouth of a container such as a bottle is known in Patent Document 1 It is. This metal cap has a score from the side to the top, and when opening the cap, pull the tab with your finger on the grip, tearing a portion of the metal cap along the score, and then tab By pulling up, the metal cap comes off from the mouth of the container and the opening is completed. When the content of the container is a carbonated beverage or the like, when the score of the metal cap is torn, the cap can be removed after the metal cap is safely released from the internal pressure without coming off the mouth of the container.

Japanese Patent No. 4656690

However, in the case of a product with a higher pressure inside the container such as a high carbonated beverage, this metal cap has a mouth portion of the container adjacent to the tab in which the gas is pulled up from the container during the tearing of the score when opening the cap. There is a risk that a blow-off phenomenon (so-called cap jumping phenomenon) may occur, in which the metal cap cannot be held and is unexpectedly removed from the mouth of the container before the score is completely torn, because it is pulled out rapidly toward the periphery. It was.
As a result of intensive studies, the present inventors have concentrated the gas to flow only at one point around the mouth of the container adjacent to the raised tab at the stage of tearing the score and opening the easy-open container lid. In this phenomenon, the tightening force (caulking force) of the easily-openable container lid against the container mouth that was attached at the moment when the tab was pulled up was loosened, and as shown in FIG. It was thought that this was caused by the fact that the liner that was in close contact with the container mouth portion was separated from the mouth portion by floating slightly, and the gas was immediately released into the closed space between the container and the shell. In addition, as a result of the gas leaking from the entire circumference of the container mouth portion losing the escape place, it was newly found that the blow-off phenomenon occurred due to the concentrated flow into the portion with the weakest tightening force.

  The present invention solves the above problems based on new knowledge, and prevents the occurrence of a blow-off phenomenon in which the lid is unexpectedly removed from the container in the middle of tearing the score at the time of opening with a simple structure. An object of the present invention is to provide an easily openable container lid that can be used.

The easy-open container lid according to the present invention has a shell formed with a cap top surface, a skirt wall depending from the periphery of the cap top surface, and a tab extending from the lower end of the skirt wall, An easily openable container lid having a disc-shaped liner on the inner surface of the top surface of the cap, wherein the shell further has a pair of scores extending upward from the skirt wall from both sides of the tab, The tab has a base portion connected to a lower end of the skirt wall and a grip portion provided below the base portion, and the skirt wall is provided with a vent hole penetrating the skirt wall in the radial direction. Therefore, the problem is solved.
Further, the container is provided with the above-described easy-open container lid, and the mouth portion of the container has a locking ridge protruding outward from the outer surface, and the skirt wall is formed on the locking ridge. The above-mentioned problem is solved by fitting with an easily openable container lid by caulking and adhering.

  According to the easy-open container lid according to claim 1 and the combination of the easy-open container lid and the container according to claim 5, the skirt wall has at least one vent hole penetrating the skirt wall in the radial direction. Since the gas leaked from the inside of the container at the time of opening is also released from the vent hole together with the mouth of the container adjacent to the raised tab, the mouth of the container adjacent to the raised tab and the vent hole are provided. In addition, the gas leaked to the closer side from the flow path formed in the entire circumference of the container mouth can be dispersed, and the pressure that the easy-open container lid receives locally from the gas is reduced, so that it does not come off the container The internal pressure of the container can be released.

According to the configuration described in claim 2 and the configuration described in claim 6, since the vent hole is provided at a position where the vent hole is not blocked by the liner of the skirt wall, from the container mouth portion close to the vent hole. The leaked gas can be quickly extracted through the shortest distance from the container mouth to the vent hole.
Further, even when the peripheral edge of the liner remains in close contact with the skirt wall for some reason when opened, the outflow of gas from the vent hole is not hindered.
According to the configuration of the third aspect of the present invention, since the vent hole is not provided on the surface to which the base portion of the skirt wall is connected, the shortest distance from each part of the container mouth to the vicinity of the nearest tab or the vent hole The gas becomes shorter and the gas can be extracted more quickly.
According to the configuration of the present invention, the vent hole is provided at least on the surface facing the surface to which the base portion of the skirt wall is connected, and the gas leaked from the container at the time of opening is stored in the container opening. Since the shortest distance is traced from each part of the section and the vicinity of the nearest tub or the opposite vent hole is exited, the gas can be extracted more rapidly. Moreover, since the vent hole is not provided in the surface to which the base part of the skirt wall was connected, the strength of the tab can be maintained.

The perspective view of the easily openable container lid 100 which concerns on one Embodiment of this invention. The side view of the easy-open container lid 100 which concerns on one Embodiment of this invention. The side view of the state which made the easy-open container lid 100 which concerns on one Embodiment of this invention fitted to the container mouth part B, sectional drawing, and P section enlarged view. The top view which showed the example of arrangement | positioning of the vent hole 114 which concerns on one Embodiment of this invention provided in the shell 110 of a sheet | seat state. The fragmentary sectional view of the easily openable container lid 100 fitted to the container mouth part B when the tab 130 is lifted until just before the notch 115 is torn. The fragmentary sectional view and Q section enlarged view of the easy-open container lid 100 fitted to the container mouth B when the notch 115 is torn and the gas G starts to escape. The side view of the easy-open container lid 100 just before lifting the tab 130 and removing from the container mouth part B after the gas G was extracted. The side view just before the easily openable container lid of a prior art example remove | deviates from the container opening part B with gas G, sectional drawing, and the R section enlarged view.

Below, the easy-open container lid 100 which concerns on one Embodiment of this invention is demonstrated based on drawing. In addition, the container which the easy-open container lid 100 fits shows only the container opening B.
The easy-open container lid 100 is mounted on the container mouth B by placing it on the container mouth B of a bottle or the like and caulking the outer surface. As shown in FIGS. A shell 110, a resin liner 120 that is in close contact with the top of the container mouth B, and a resin tab 130 that is operated by the user when opened are provided.
As shown in FIG. 1, the shell 110 has a cap top surface 111 and a skirt wall 113 depending from the periphery of the cap top surface 111.
The tab 130 has a base portion 131 connected to an extending portion 116 in which a part of the lower end of the skirt wall 113 extends downward, and a grip portion 132 provided below the base portion 131.
The shell 110 is provided with a pair of scores 112 extending upward from both sides of the extending portion 116 to which the tab 130 is connected, extending upward through the skirt wall 113 and extending in a circular arc shape at the periphery of the cap top surface 111.
A plurality of vent holes 114, which are circular holes, are provided on the surface of the skirt wall 113 that is not sandwiched between the pair of scores 112, and the lower end of the skirt wall 113 is formed at a location where the pair of scores 112 are formed. Is provided with a notch 115.
As shown in FIG. 4A, 15 vent holes 114 are provided at equal intervals in the circumferential direction on the surface of the lower end of the skirt wall 113 that is not sandwiched between the pair of scores 112. As shown in FIGS. 4B to 4D, the vent holes 114 may be provided concentrating on a part of the skirt wall 113, or the number of the vent holes 114 may be changed.
However, if the score 112 tears outward when the score 112 is torn, the vent hole 114 may cause a cap opening failure. Therefore, it is not preferable to place the vent hole 114 near the score 112. It is arranged at a position spaced apart.

The liner 120 is formed in a disk shape having a diameter that is larger than the arc-shaped portion of the pair of scores 112 and does not block the vent hole 114, and is bonded to the inner surface of the cap top surface 111.
The liner 120 includes a ring-shaped inner ring 121 that is in close contact with the inner surface of the container mouth B, and a ring-shaped outer ring 122 that hangs down from the periphery of the liner 120.
The base portion 131 of the tab 130 is connected to an extending portion 116 sandwiched between a pair of scores 112 at the lower end of the skirt wall 113, and a ring-shaped gripping portion 132 is provided at the lower end of the base portion 131.
The easy-open container lid 100 is placed on the container mouth B, and is secured by crimping the lower part of the skirt wall 113 and bringing it into close contact with the lower part of the locking protrusion T.
At this time, the inner ring 121 of the liner 120 is brought into close contact with the inner side surface of the container mouth B, and the outer ring 122 of the liner 120 is pushed and spreads by contacting the locking protrusion T when fitting into the container mouth B. Then, it is deformed so as to be in close contact from the cap top surface 111 to the skirt wall 113, and the space between the container mouth B and the skirt wall 113 is filled. As a result, the container is closed with the sealing property secured.
Note that it is preferable that the outer ring 122 does not block the vent hole 114 even after crimping.

Next, the procedure for opening the container mouth B by the easy-open container lid 100 according to this embodiment will be described.
First, as shown in FIG. 5, the skirt wall 113 connected to the base portion 131 is lifted up by lifting the grip portion 132 upward, and when the grip portion 132 is further lifted upward, the base portion 131 is lifted up. The skirt wall 113 connected to is started to tear along the pair of scores 112 starting from the notch 115.
As the score 112 gradually tears, the adhesion force of the skirt wall 113 to the locking protrusion T is weakened, and the easy-open container lid 100 is caused by the pressure of the gas G in the container as shown in FIG. Move upward away from the container mouth B slightly.

As a result, the adhesion between the container mouth B and the inner ring 121 is weakened, and a slight gap is formed between the liner 120 and the container mouth B over the entire circumference of the container mouth B.
The gas G in the container leaks from the entire circumference of the container mouth B through this gap. At this time, since the vent holes 114 are provided in the skirt wall 113 and the gas G is dispersed and discharged, the tightening force of the entire circumference of the skirt wall 113 with the score 112 in the vicinity of the tab 130 being torn halfway. Even when the pressure becomes weak, the pressure applied to the periphery adjacent to the pulled-up tab 130 does not increase locally, and the easy-open container lid can be prevented from unexpectedly removing (blow-off phenomenon).
As the number of vent holes 114 increases, the gas G is discharged more quickly. However, by providing the vent holes 114 on the skirt wall 113 at a position facing the tab 130, the gas G in the container is in a symmetrical position. Since the pressure is balanced out from each of the skirt walls, the circumferential adhesion of the skirt wall 113 can be kept balanced, which is particularly effective.
As the gas G is dispersed and discharged from the lower part of the skirt wall 113 and the vent hole 114, the pressure inside the container is lowered safely and sufficiently, and the easy-open container lid 100 is raised as shown in FIG. Along the score 112, the cap top surface 111 is torn near the center, and the skirt wall 113 loses the adhesion to the locking protrusion T and comes off from the container mouth B, which can be safely removed, thereby completing the opening. To do.

As mentioned above, although embodiment of this invention was explained in full detail, this invention is not limited to the said embodiment, A various design change can be made without deviating from this invention described in the claim. Is possible.
In the embodiment described above, the score has been described as extending upward from the lower end of the skirt wall and the peripheral edge of the cap top surface extending in an arc shape. For example, it may be formed linearly on the top surface of the cap, or may be formed only on the skirt wall.

In the above-described embodiment, the description has been made assuming that the lower end of the skirt wall is provided with the notch at the position where the pair of scores is formed. However, the shape of the lower end of the skirt wall is limited to this. For example, a thin weakened portion may be formed so as to be connected to the score without providing a notch, or may be formed in a perforated shape.
In the above-described embodiment, the skirt wall has been described as being provided with a plurality of vent holes that are circular holes. However, the number and shape of the vent holes are not limited thereto. It may be a long elliptical hole or a slit opened below the skirt wall.
In the above-described embodiment, the shell is made of metal and the liner and the tab are made of resin. However, the material of each member is not limited to this, and for example, a metal tab may be used. The shell and the tab may be integrally formed.
In the above-described embodiment, the grip portion is described as being formed on the ring. However, the shape of the grip portion is not limited to this, and for example, the grip portion may be formed in a solid fan shape. You may form in a shape.

DESCRIPTION OF SYMBOLS 100 ... Easy-open container lid 110 ... Shell 111 ... Cap top surface 112 ... Score 113 ... Skirt wall 114 ... Vent hole 115 ... Notch 116 ... Extension Protruding part 120 ・ ・ ・ Liner 121 ・ ・ ・ Inner ring 122 ・ ・ ・ Outer ring 130 ・ ・ ・ Tab 131 ・ ・ ・ Base part 132 ・ ・ ・ Gripping part B ・ ・ ・ Container mouth part T ・ ・ ・ Locking ridge G ・ ・ ・ Gas

Claims (6)

The top surface of the cap has a shell formed with a skirt wall depending from the periphery of the top surface of the cap, and a tab extending from the lower end of the top surface of the skirt wall. An easily openable container lid having a liner,
The shell further includes a pair of scores extending upward from the skirt wall from both sides of the tab;
The tab has a base portion connected to a lower end of the skirt wall, and a grip portion provided below the base portion,
The easily openable container lid according to claim 1, wherein the skirt wall is provided with at least one vent hole penetrating the skirt wall in a radial direction.   The easily openable container lid according to claim 1, wherein the vent hole is provided at a position where the liner is not blocked by the liner of the skirt wall.   The easily openable container lid according to claim 1 or 2, wherein the vent hole is not provided on a surface of the skirt wall to which the base portion is connected.   The easily openable container lid according to any one of claims 1 to 3, wherein the vent hole is provided on at least a surface of the skirt wall facing a surface to which the base portion is connected.   A combination of the easily openable container lid and the container according to any one of claims 1 to 4, wherein the mouth of the container has a locking ridge protruding outward from the outer surface, The combination of an easily openable container lid and a container, wherein the easily openable container lid and the container are fitted by crimping and closely contacting the skirt wall with the locking protrusion.   In the state in which the easy-open container lid is crimped and brought into close contact with the locking protrusion of the container, the vent hole of the easy-open container lid is in a position that is not blocked by the liner of the skirt wall. The combination of an easily openable container lid and a container according to claim 5, wherein the combination is provided.

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