JPH07291319A - Combination structure of cap and bottle - Google Patents

Abstract

(57) [Summary] [Purpose] Improves the sealing performance of the resin cap that seals the bottle mouth of the bottle filled with drinking water and the pill-proof performance, and also improves the openability and seals even under thermal conditions. Provide a combined cap and bottle structure that does not damage the [Structure] A thin metal upper cap is wrapped around a synthetic resin lower cap and a bottle cap to cap and cap the upper and lower caps. The upper structure has a compound material for sealing the bottle top. A lower cap having a plurality of bridges that are adhered and rupture when opened and one wide bridge that does not rupture and a tamper evidence connected to the lower end by the two types of bridges is closely adhered to the bottle ring portion, and the bottle ring The portion is provided with a plurality of convex portions or concave portions, and a plurality of concave portions or convex portions that can be in close contact with the convex portions or concave portions are provided on the inner wall of the tamper evidence.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cap and a bottle for sealing the bottle mouth of a glass bottle or a plastic bottle, which is filled at a high temperature of 70 ° C. or higher and is then subjected to heat treatment such as sterilization at a high temperature. The present invention relates to a combined structure, and a main object thereof is to provide a combined structure of a cap and a bottle that can greatly improve the opening property without impairing the sealing property even under a high temperature condition.

[0002]

2. Description of the Related Art Recently, a pill fur proof made of synthetic resin for drinking water bottles and whiskey bottles (hereinafter referred to as P
A cap (referred to as P) has been developed and has been widely used. However, the elasticity and ductility of synthetic resin cause elongation during opening, so that the bridge is not easily cut even when the cap is rotated and the cap is opened. Not only does it often cause trouble for consumers that it is difficult to open the package, but the rotation of the cap releases the airtightness and leaves the bridge uncut, leaving the PP performance unopened. There is a risk that it will be mistaken for the one that keeps airtightness even if it is damaged even if it is damaged.

On the other hand, the synthetic resin cap softens as the temperature rises, and the opening of the PP cap not only causes the bridge to extend as described above as the PP cap rotates, but is not cut at all and the entire cap comes out of the bottle mouth. There is also the problem of being lost.

Also, from the viewpoint of maintaining the airtightness, due to its elasticity and softening characteristics, the contact with the top surface of the bottle becomes insufficient, so that the gas pressure in the carbonated beverage bottle is lowered and the vacuum in the hot pack beverage bottle is reduced. There is a risk that important problems such as alteration of the contents will not occur because (decompression) is not maintained.

[0005]

In order to solve the above-mentioned problems, the applicant of the present application has already proposed a combined structure of a synthetic resin cap and a bottle mouth. In order to further improve the sealing performance when applied, the performance of sealing the bottle mouth with the compound material is superior to the case where the packing material is used, but the compound material cannot be bonded with the synthetic resin cap. Since there is a drawback and there is a risk of hand cutting etc. due to the cut portion at the time of opening with the conventional aluminum cap, it is necessary to satisfy heat resistance, airtightness and openability at the same time with a cap made of only one material However, the inventors have reached the present invention.

The present invention solves the above-mentioned problems, allows capping with a conventional PP cap seamer at the filling destination, reliably maintains airtightness even under high temperature conditions, and cuts when opened. (EN) It is intended to provide a combined structure of a cap and a bottle which is capable of easily cutting the bridge without worrying about hand-cutting due to the above, and does not cause the cap to come off.

[0007]

DISCLOSURE OF THE INVENTION The present invention, which has been made to solve the above problems, has a structure in which a thin cylindrical portion hanging down from a peripheral edge of a circular top surface and a compound material are bonded to the inner surface of the top surface. The lower structure closely fitted to the male screw portion provided on the side wall of the bottle neck by fitting the upper structure of the bottle to the bottle neck portion and crimping it to the top surface of the bottle neck and the protruding ring portion provided near the male screw portion. The upper and lower structures are integrated and the cap is attached by tightening the ring-shaped groove portion of the upper structure, and the material of the upper structure is made of metal such as aluminum or tin except the compound material, and the lower structure is The lower structure is made of synthetic resin, and the lower structure has a ring-shaped groove portion in which the lower end portion of the upper structure is wound and tightened so that the lower end portion is not exposed to the outer periphery, and the upper convex ring portion of the ring-shaped groove portion is formed. One or more droops on the underside of the The lower convex ring portion has a tamper evidence connected to the lower end by a plurality of narrow bridges that break when opened and one wide bridge that does not break when opened. The tamper evidence has one split that hangs at the end of the wide bridge hanging at the time of opening, and the protruding ring part provided in the bottle mouth prevents the tamper evidence from rotating when the cap is opened. The present invention is characterized in that a plurality of convex portions or concave portions for preventing is provided, and a concave portion or a convex portion capable of closely engaging with the convex portions or concave portions is provided on the inner wall of the tamper evidence.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments of the drawings. As shown in FIG. 1, the combination structure of the cap and bottle of the present invention includes an upper cap 10 made of metal such as aluminum or tin and a male cap of the bottle 30 and a lower cap made of synthetic resin as a lower structure. 20 ring-shaped grooves 29
Wrap it with a well-known means such as a roller, and integrate it 1
Make up one capping.

As shown in FIG. 4, a compound for keeping the airtightness inside the bottle is closely attached to the inner surface of the top surface 11 of the upper cap 10 which is an upper structure so as to be inserted into the mouth top portion 34 of the bottle 30. The material 12 is adhered and the cylindrical portion 12 is provided so as to hang down from the circumferential circle of the top surface 11, and is made of thin metal such as aluminum.

The lower cap 20 made of synthetic resin of the lower structure has a mouth of the molded bottle 30 inserted into a mold for molding the lower cap 20, and the protruding ring portion of the bottle 30 is formed by an injection molding method. 1 or the lower cap 20 is divided into two or three pieces and formed by a known method so that the lower cap 20 is brought into close contact with the protruding ring portion 32 of the bottle. You may assemble like this. Then, after the subsequent filling, the upper cap 10 is fitted into the bottle mouth portion and the top surface 11 is pressed against the screw portion 31 of the bottle 30 and the groove portion 29 of the lower cap 20 with a roller for capping. .

As described above, according to the present invention, in which the upper cap 10 is wound around the lower cap 20 and the bottle 30 and capped, the conventional aluminum PP cap in which the compound is adhered to the inner surface of the conventional top surface is used. When the cap is capped, the bridge 22 is cut by rotating the integrated upper cap 10 and the lower cap 20 at the time of opening, and the bridge 22 is hung at one end of the wide bridge 23 to vertically cut the tamper evidence 21. The split 24 is cut and the cap is bottled 30
Can be removed from.

The lower surface of the upper convex ring portion 25 of the ring-shaped groove portion 29 of the lower cap 20 is shown in FIG. 3 so that the upper cap 10 and the lower cap 20 can be integrally rotated by the rotational force when the cap is opened. By providing one or more protrusions 28 on the lower side, it is possible to prevent only the upper cap 10 from rotating. Ridge 28
The shape is not limited to that shown in FIG. 3, and any shape can be used as long as it can prevent slipping of the upper cap 10 and the lower cap 20 and can be wound and closed by a known roller type capper or the like.

On the other hand, the lower convex ring portion 26 is connected to the lower end by a plurality of narrow bridges 22 provided circumferentially so as to be broken when opened and one wide bridge 23 which is not broken when opened. The tamper evidence 21 is provided, and the tamper evidence has a structure in which one split 24 that breaks at the time of opening is hung from one end of the wide bridge.

Further, the projecting ring portion 3 provided at the bottle mouth portion
Two convex portions 33 are provided on the lower surface of 2, and the convex portions 33 are formed on the inner wall 26 of the tamper evidence 21 connected to the plurality of bridges 22 and the one wide bridge 23 on the lower cap 20. The two recesses 27 are fitted together. Although four convex portions are provided in the embodiment, the number of convex portions is not limited to four.

[0015]

The combined structure of the cap and the bottle mouth of the present invention thus constructed has a compound material adhered to the inner surface of the cap top in order to keep the top surface of the bottle mouth airtight. Even if the subsequent cap portion is subjected to high-temperature thermal conditions, airtightness can be surely maintained.

Further, since the capping method is the same as the capping method of the conventional aluminum PP cap, the existing capping step can be applied with almost no modification.

On the other hand, when the cap is opened, the upper and lower structures integrated when the cap is rotated are fixed by the protrusions so that they do not slip, and the rotation of the tamper evidence rotates the protrusions provided on the protruding ring portion of the bottle. It is completely prevented by fitting the part (or concave part) and the concave part (or convex part) provided on the inner wall of the tamper evidence, so the bridge and slit can be cut with a slight rotation of the cap, so opening is easy Therefore, the cap can be completely prevented from coming off. Furthermore, since the aluminum cutting part is not exposed to the outer surface at all, the risk of hand-cutting can be prevented.

[0018]

As described above, according to the present invention, the conventional capping process can be applied, and there is no fear of impairing the airtightness even under thermal conditions such as high temperature filling or high temperature sterilization after filling, and PP Since the performance can be surely maintained and the unsealing property can be improved, troubles associated with unsealing and maintaining hermeticity at the consumer stage are eliminated. Therefore, the present invention greatly contributes to the industry by solving the conventional problems.

[Brief description of drawings]

FIG. 1 is a partially cutaway sectional view showing an embodiment of the present invention.

FIG. 2 is an AA end view of FIG. 1 showing an embodiment of the present invention.

FIG. 3 is a perspective view of a protrusion of the lower cap according to the embodiment of the present invention.

FIG. 4 is a perspective view of a partial cross-section showing the shape of the upper cap of the embodiment of the present invention before tightening.

[Explanation of symbols]

10 Top cap 11 Top surface
12 compound material 20 lower cap 21 tamper evidence 22 bridge 23 wide bridge
24 split 25 upward convex ring portion 26 downward convex ring portion 27 concave 28 projecting
29 ring-shaped groove 30 bottle 32 projecting ring
33 convex

Claims (4)

[Claims] 1. A thin cylindrical portion hanging down from a peripheral edge of a circular top surface and an upper structure having a structure in which a compound material is adhered to the inner surface of the top surface are fitted on the bottle mouth portion to attach to the bottle top surface. The upper and lower structures are integrated and the cap is formed by crimping and winding the male screw portion provided on the side wall of the bottle mouth and the ring-shaped groove portion of the lower structure closely attached to the protruding ring portion provided near the male screw portion. A combination structure of a cap and a bottle mouth that is characterized by being attached. 2. The cap and bottle according to claim 1, wherein the upper structure is made of a metal such as aluminum or tin except the compound material, and the lower structure is made of synthetic resin. Mouth combination structure. 3. The lower structure has a ring-shaped groove portion in which the lower end portion of the upper structure is wound and tightened so that the lower end portion is not exposed to the outer periphery, and 1 is provided on the lower surface of the upward convex ring portion of the ring-shaped groove portion.
One or more hanging ridges are provided, and the downward convex ring part has a tamper evidence connected to the lower end by a plurality of narrow bridges that break when opened and one wide bridge that does not break when opened. The combination structure of the cap and the bottle mouth according to claim 1, wherein the tamper evidence is provided with one split that ruptures at the time of opening, depending on one end of the wide bridge. 4. The protruding ring portion provided at the bottle mouth is provided with a plurality of convex portions or concave portions for preventing rotation of the tamper evidence when the cap is opened, and is closely contacted with the convex portions or concave portions. The engageable recess or protrusion is provided on the inner wall of the tamper evidence.
Combination structure of cap and bottle as described in.