JP4161521B2 - 2 piece cap - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a two-piece cap composed of a cap body and an inner plug that are screwed onto a mouth and neck of a bottle filled with a liquid content such as a beverage.
[0002]
[Prior art]
Conventionally, for example, PET bottles (polyethylene terephthalate bottles stretched and blow-molded) filled with beverages such as fruit juice, tea, tea, coffee, cola, etc., two pieces with an inner plug inserted under the top plate of the cap body A cap was used. As the two-piece cap (10), for example, as shown in FIG. 4A, for example, the bottle (20) is sealed under the inner surface of the top plate (110) of the cap body (100). An inner plug (200) having an inner sealing ring (211) (the outer peripheral surface is in close contact with the inner peripheral surface of the mouth of the bottle) on the lower surface of the inner plug substrate (210) is used. When the bottle is opened, as shown in FIG. 4B, when the cap body (100) is rotated in the opening rotation direction to raise the cap body, the bottle (20) is sealed. The outer peripheral inner edge of the inner plug substrate (210) of the inner plug (200) that has been in contact with the upper end of the threaded portion (121) provided on the inner peripheral surface of the peripheral wall (120) of the cap body, and thereafter The inner stopper rises together with the cap body, the inner sealing ring (211) of the inner stopper is detached from the bottle mouth neck (21), and the bottle is opened. Depending on the purpose of use of the bottle, in order to further improve the sealing performance of the cap with respect to the bottle, an outer sealing ring (inner peripheral surface on the outer peripheral surface of the mouth of the bottle) In order to seal the bottle, the outer sealing ring and the inner sealing ring described above are used.
[0003]
[Problems to be solved by the invention]
However, in the above-described conventional two-piece cap provided with an inner sealing ring in the inner plug, as shown in FIG. 5, the inner plug (200) is connected to the cap main body (100) when capping the bottle neck and neck. In some cases, the capping may become unstable by inclining by the lead angle of the threaded portion (121). In addition, when opening the bottle, the inner sealing ring is detached from the bottle neck of the cap after the inner peripheral edge of the inner periphery of the inner stopper substrate of the inner stopper comes into contact with the upper end of the threaded portion of the cap body. The opening angle for opening the bottle seal increased. In addition, the cap that seals the bottle with the outer sealing ring and the inner sealing ring described above has a large opening to open the bottle due to the fitting force of the sealing ring to the bottle and the internal pressure after high temperature filling is reduced. It requires torque and is difficult to open for people with weak gripping force, and it must be strong against the cap of the inner plug, and the inner plug must be made of a highly rigid material with poor packing properties. It was.
[0004]
The present invention solves the above-described conventional problems, has good capping properties when screwed into the mouth and neck of the bottle, and the bottle of the cap when the cap is unscrewed from the mouth and neck of the bottle. The present invention provides a two-piece cap that has a small sealing opening rotation angle, does not require a large opening torque force, and can use a material having a good packing property for the inner plug.
[0005]
[Means for Solving the Problems]
That is, according to the first aspect of the present invention, there is provided a cap body that is screwed into the bottle neck and neck portion of the bottle, and an inner plug having a sealing ring on the lower surface that is inserted under the inner surface of the top plate of the cap body A plurality of thin blade-shaped support portions extending horizontally at equal intervals on the outer peripheral surface of the inner plug substrate of the inner plug, and when the inner plug is attached to the cap body , folded downward along said blade-like support portion on the inner peripheral surface of the cap body, and at least one of the tip of the blade-like support portion, and abuts against the upper end of the threaded portion of the cap body, said The two-piece cap is characterized in that the sealing ring of the inner plug includes an outer sealing ring and an inner sealing ring provided inside the outer sealing ring .
[000 6 ]
Next, the second invention of the present invention, the planar shape of the blade-like support portion is a two-piece cap according to the first aspect, which is a triangular shape.
[000 7 ]
Next, a third invention of the present invention is the two-piece cap according to the first invention , wherein a planar shape of the blade-shaped support portion is a quadrangular shape.
[000 8 ]
Next, a fourth invention of the present invention is the two-piece cap according to the first invention , wherein a planar shape of the blade-shaped support portion is a trapezoidal shape.
[000 9 ]
According to a fifth aspect of the present invention, there is provided the two-piece cap according to the first aspect, wherein the planar shape of the blade-shaped support portion is a semicircular shape.
[00 10 ]
DETAILED DESCRIPTION OF THE INVENTION
The two-piece cap of the present invention is to be screwed into a mouth-and-neck portion such as a PET bottle filled with a liquid content such as a beverage, and the cap body having a screwed portion on the inner peripheral surface and the cap It is comprised from the inner stopper which has a sealing ring in the lower surface inserted under the inner surface of the top plate of a main body. A plurality of thin blade-shaped support portions are extended horizontally at equal intervals on the outer peripheral surface of the inner plug substrate of the inner plug. When the inner plug is attached to the cap body, the blade-shaped support portion is Bending downward along the inner peripheral surface of the cap body, at least one tip of the blade-like support portion comes into contact with the upper end of the screwing portion of the cap body. Further, the inner ring sealing ring is provided with an inner sealing ring or an inner sealing ring on the lower surface of the inner plug substrate and an outer sealing ring on the outer side thereof. Further, the shape of the blade-like support portion is such that the planar shape is a triangle shape, a square shape, a trapezoidal shape, a semicircular shape, or the like. The cap body is manufactured by an injection molding method using a thermoplastic resin such as polypropylene or polyethylene, and the inner plug is manufactured by an injection molding method using a thermoplastic resin suitable for the intended use of the bottle. Is.
[00 11 ]
Next, an embodiment of the two-piece cap of the present invention will be described in detail with reference to the drawings.
Fig.1 (a) is sectional drawing which shows the principal part of 2 piece cap of this embodiment, FIG.1 (b) is a cross section which shows a fitting state when a cap is screwed by the bottle mouth neck part. FIG. Fig.2 (a) is sectional drawing of the inner stopper before insertion in the cap main body of the cap of this embodiment, FIG.2 (b) is a bottom view. FIG. 3A shows the cap body of the cap according to the present embodiment, which is screwed to the bottle neck of the bottle, when the cap body is rotated in the opening rotation direction in order to open the bottle. FIG. 3B is a cross-sectional view showing a state immediately before the inner sealing ring is detached from the bottle neck of the bottle.
[00 12 ]
As shown in FIG. 1 (a), the two-piece cap (10) of the present embodiment has a threaded portion (male thread) of the mouth and neck of the bottle on the inner peripheral surface of the peripheral wall (120) of the cap body (100). A screwing portion (121) (female screw) to be screwed is provided, and a contact ring (111) is provided on the inner surface of the top plate (110). As shown in FIGS. 2 (a) and 2 (b), the inner plug (200) has a thin blade-shaped support portion (four flat shapes on the outer peripheral surface of the inner plug substrate (210) that is semicircular. 213) is extended in the horizontal direction at equal intervals. As shown in FIG. 1 (a), the blade-shaped support portion (213) is a cap when the inner plug (200) is inserted under the inner surface of the top plate (110) of the cap body (100). It is bent downward along the inner peripheral surface of the main body, and is provided so that the tip of at least one blade-like support portion is in contact with the upper end of the screwing portion (121) of the cap main body. As shown in FIGS. 2 (a) and 2 (b), the inner stopper (200) of the present embodiment has an outer peripheral surface of the mouth of the bottle neck at the outer peripheral inner edge of the inner plug substrate (210). An inner sealing ring (211) is provided on the inner surface of the inner plug substrate, and an inner sealing ring (211) is placed on the inner peripheral surface of the mouth neck of the bottle. is there.
[00 13 ]
When the two-piece cap (10) of the present embodiment described above is capped and attached to the mouth and neck (21) of the bottle (20) as shown in FIG. 1 (b), the mouth of the mouth and neck of the bottle Is firmly sealed from the inside and outside by the outer sealing ring (212) and the inner sealing ring (211), and thus the cap of the present embodiment has a good sealing property against the bottle. Further, as shown in FIG. 1A, the inner plug (200) inserted under the inner surface of the top plate (110) of the cap body (100) has a plurality of blade-like support portions (213). Further, since the tip of at least one blade-like support portion is in contact with the upper end of the screwed portion (121) of the cap body, The cap is set in a stable position and the cap is suitable for capping. Further, since the inner plug is positioned with respect to the cap body by the plurality of blade-shaped support portions, a soft material having good packing property can be used for the inner plug.
[00 14 ]
In order to open a bottle equipped with the two-piece cap of this embodiment, as shown in FIG. 3A, when the cap body (100) is rotated in the opening rotation direction and the cap body is raised, the inner plug (200 ) Is firmly fitted with the outer sealing ring (212) and the inner sealing ring (211) to the mouth and neck (21) of the bottle (20). The blade-like support portions (213) that are parallel to each other are refracted by the ascending of the screwing portions (121) of the cap body that abuts. The refracted blade-shaped support portion has a spring effect of extending, and the reaction force pushes the inner plug (200) upward as shown in FIG. 3 (b), thereby opening the mouth of the bottle (20). The inner plug comes off from the neck (21). Since the spring reaction force of the blade-shaped support part is added to the cap opening torque force, the cap bottle sealing opening rotation angle becomes small, and when the inner cap sealing ring is removed from the bottle, a large opening torque force Is not required, so it is easy to open the cap even for people with weak grip.
[00 15 ]
【The invention's effect】
In the two-piece cap of the present invention, a blade-like support portion is provided on the outer periphery of the inner stopper, and the inner stopper does not tilt in the cap body by the blade-like support portion, and is screwed to the mouth and neck of the bottle. The capping property is good.
[00 16 ]
Also, when unscrewing the cap from the neck and neck of the bottle, the spring reaction force of the blade-like support portion described above can reduce the bottle sealing opening rotation angle and does not require a large opening torque force. Easy cap.
[00 17 ]
Furthermore, since the inner stopper is firmly inserted into the cap body at a predetermined position by the blade-shaped support portion, a relatively soft material having good packing property can be used for the inner stopper according to the purpose of use of the bottle. .
[Brief description of the drawings]
1A is a cross-sectional view showing a main part of a two-piece cap according to an embodiment of the present invention, and FIG. 1B is a fitting state when the cap is screwed to a bottle mouth neck. FIG.
2A is a cross-sectional view of the inner plug before being inserted into the cap body of the two-piece cap of FIG. 1, and FIG. 2B is a bottom view.
3A is a view immediately after the start of rotation when the cap body of the two-piece cap of FIG. 1 that is screwed into the neck of the bottle mouth is rotated in the opening rotation direction in order to open the bottle. It is sectional drawing which shows the state of an inner stopper, (b) is sectional drawing which shows the state just before an inner sealing ring detaches | leaves from the mouth neck part of a bottle.
FIG. 4A is a cross-sectional view of a conventional two-piece cap screwed onto the mouth and neck of a bottle, and FIG. It is sectional drawing which shows the state just before detachment | leave.
FIG. 5 is an explanatory view showing a state when the inner plug is inclined at the time of capping the conventional two-piece cap shown in FIG. 4;
[Explanation of symbols]
10 …… Two piece cap 20 …… Bottle 21 …… Mouth and neck portion 22,121 …… Screw portion 100 …… Cap body 110 …… Top plate 111 …… Contact ring 120 …… Surrounding wall 200 …… Inner plug 210… ... Inner plug substrate 211 ... Inner sealing ring 212 ... Outer sealing ring 213 ... Blade-shaped support

Claims (5)

A two-piece cap comprising: a cap body that is screwed into a mouth-neck portion of a bottle; and an inner plug having a sealing ring on a lower surface that is inserted under the inner surface of the top plate of the cap body. A plurality of thin blade-like support portions are horizontally extended at equal intervals on the outer peripheral surface of the inner plug substrate, and when the inner plug is attached to the cap body, the blade-like support portion is attached to the cap body. bent downward along the inner peripheral surface, and at least one of the tip of the blade-like support portion, and abuts against the upper end of the threaded portion of the cap body, a sealing ring in said plug, the outer sealing A two-piece cap comprising a ring and an inner sealing ring provided inside the outer sealing ring . The two-piece cap according to claim 1, wherein a planar shape of the blade-shaped support portion is a triangular shape. The two-piece cap according to claim 1, wherein a planar shape of the blade-shaped support portion is a quadrangular shape. The two-piece cap according to claim 1, wherein a planar shape of the blade-shaped support portion is a trapezoidal shape. The two-piece cap according to claim 1, wherein a planar shape of the blade-shaped support portion is a semicircular shape.

Images