JP2000128199A - Plastic pilfer-proof cap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide, for a plastic cap having an engagement assurance ring with a diameter larger than that of a cap main body connected to the bottom edges of the cap main body by half-cut bridges, a plastic pilfer-proof cap whose engagement assurance ring firmly engages and half-cut bridges are easy to cut at the time of uncapping. SOLUTION: In the plastic pilfer-proof (fraudulent-uncapping preventable) cap in which, on the bottom edges 10a of a cap main body 10, an engagement assurance ring 30, having a diameter larger than that of the cap main body 10, which is connected to the bottom edges 10a by means of half-cut bridges 20 is provided, a series of vertical grooves (knurls) 10b and 40b are formed on the peripheral faces of the cap main body 10 and the engagement assurance ring 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cap as a sealing material for a liquid container or the like, and more particularly to a cap for a liquid container such as a gable-top type having a function of preventing unauthorized opening. .

[0002]

2. Description of the Related Art Conventionally, in a cap for closing an extraction port of a liquid container or the like, when the cap is opened, a bridge or a score attached to a cap hem is cut off.
Known as a pill fur proof cap that has a function of preventing the opening of the container with a guarantee ring and evidence of opening, that is, a function to prevent unauthorized opening (hereinafter referred to as pill fur proof property). It is used in a wide range of fields, mainly for beverages such as soft drinks, in order to prevent such problems.

The above-mentioned plastic pill fur proof cap is made of aluminum or plastic whose bridge or score is easy to be cut. The former aluminum is used to prevent the customer from being injured by the guarantee ring or the like when opening the plug. There is a problem, and in recent years, plastic caps having the same kind of function and having a lock function added to the security ring have been used.

In recent years, as liquid containers for soft drinks and alcoholic beverages, gable-top paper containers with extraction ports, back-in-boxes, back-in-cartons, and the like have been widely adopted in terms of container transportation costs and environmental friendliness. As a result, the cap for sealing the extraction port is required to have a function of preventing unauthorized opening.

[0005] As an example of a cap for the above demand, as shown in Fig. 4, a fitting assurance ring (30) connected to a skirt (10a) of a cap body (10) by a half-cut bridge (20) is provided. There is a plastic cap that has a diameter larger than that of the cap body. further,
Vertically striped grooves (hereinafter referred to as knurls (10b)) are provided on the outer peripheral surface of the cap body (10).

In sealing the plastic cap of the above case (hereinafter referred to as capping), a knurl (10
The cap body (10) provided with b) is clamped and driven to fit into the bottle extraction port (40). In particular, the projection-like fitting provided at the lower part of the bottle extraction port (40) It has a so-called hell fastening structure that is strongly fitted to the portion (40a), and the fitting assurance ring (30) has a bottle extraction opening (4).
0).

Further, when opening the plastic cap in the above case, the half-cut bridge (20) breaks,
The fitting assurance ring (30) is left in the bottle outlet (40). For example, when the cap is opened improperly and then reclosed, the half cut bridge (20) is seen from the top surface of the cap body (10). It is easier to see the presence or absence of the pill fur proof than the one that is provided with a security ring via a score or a half cut bridge (20) on the extension of the hem of the commonly used cap body (10) This is a cap with excellent properties.

[0008]

However, in the plastic cap of the above case, the bottle extraction port (4
In the case of capping to 0), as described above, only the cap body (10) provided with the knurl (10b) is clamped and driven, and the cap body (10) and the fitting assurance ring (30) are strongly tightened. Therefore, it was necessary to make the half-cut bridge (20) strong enough not to break during capping. As a result, there is a problem that the half-cut bridge (20) is hard to be broken at the time of opening.

Further, if the half-cut bridge (20) is made easy to cut in consideration of the above-mentioned problem of being hard to cut, there is a problem that the fitting assurance ring (30) cannot be strongly tightened conversely. Was. Therefore, the half-cut bridge (2
However, there is a quality problem that some of the materials are difficult to cut.

The present invention has been made to solve the above-mentioned problems of the prior art. It is an object of the present invention to provide a fitting assurance ring (30) having a diameter larger than that of a cap body (10).
In the plastic cap connected to the skirt (10a) of the cap body (10) by the half-cut bridge (20), the fitting assurance ring (30) is strongly fitted, and when opened, the half-cut bridge (20). Is to provide a plastic pill fur proof cap that is easily cut.

[0011]

According to the present invention, in order to achieve the above object, according to the present invention, the cap body is connected to the skirt of the cap body by a plurality of half-cut bridges. In a plastic pill fur proof cap (having a property of preventing unauthorized opening) provided with a fitting assurance ring having a larger diameter, vertical stripe-shaped grooves (knurls) are formed on the outer peripheral surfaces of the cap body and the fitting assurance ring. This is a plastic pill fur proof cap characterized by being applied.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings. As shown in FIG. 1, the plastic pill fur proof cap of the present invention has a fitting assurance ring (30) having a larger diameter than the cap body (10).
Is a plastic cap connected to a skirt (10a) of the cap body (10) by a plurality of half-cut bridges (20), the outer peripheral surface of the cap body (10) and the outer peripheral surface of the fitting assurance ring (30). Is a plastic pill fur proof cap (1) characterized in that a plurality of vertical striped knurls (10b, 30a) are provided on each of the pill fur proof caps (1).

As shown in FIG. 2, when the plastic pill fur proof cap (1) of the present invention is capped at the bottle extraction port (40), a cap having a vertical striped knurl (10b) on the outer peripheral surface. Body (1
The half-cut bridge (20) is easily cut, for example, by simultaneously clamping the fitting assurance ring (30) provided with the vertical striped knurl (30a) and driving and fitting both at the same time as in (0). Even in this case, the so-called hell fastening that the fitting assurance ring (30) is fitted to the protruding fitted portion (40a) provided at the lower part of the bottle extraction opening (40) can be strongly provided. Therefore, a half-cut bridge (20) having a moderate ease of cutting can be obtained, and a pill fur proof cap made of plastic, which is superior in quality control in manufacturing, can be obtained.

Further, when opening the plastic pill fur proof cap (1) of the present invention, a plurality of half-cut bridges (20) can be cut easily.
The fitting assurance ring (30) remains in the fitted portion (40a) of the bottle extraction opening (40).

Further, as shown in FIG. 3, the plastic pill fur proof cap (1) of the present invention comprises a fitting assurance ring (30) having a larger diameter than the cap body (10), and these are provided with a plurality of half cuts. Bridge (2
0), it is easy to determine whether the half-cut bridge (20) has been cut due to unauthorized opening or the like from the upper side of the cap, and the cap has excellent pill fur proof properties. be able to.

The plastic pill fur proof cap (1) of the present invention is manufactured by injection molding or compression molding, which can be selected as appropriate. In addition, low density polyethylene, high density polyethylene, linear polyethylene, polypropylene, etc., blended with additives such as lubricants, antistatic agents, coloring agents, etc. as necessary, can be used for this material. Bridge (20)
Can be appropriately selected in consideration of the cutting properties of the material.

Further, as a use of the plastic pill fur proof cap (1) of the present invention, in particular, a fitting assurance ring (3) having a diameter larger than the cap body (10).
The plastic cap having the structure of (0) is a gable-top type paper container having a sealing flange (40b) below the bottle outlet (40) as shown in FIG. 2, a back-in-box, and a back-in-box. It can be applied to a carton or the like, and can be suitably used particularly for a liquid container for storing alcoholic beverages, soft drinks, and the like that require pill fur proof properties.

[0018]

As described above, the present invention has the following effects. That is, in a plastic cap in which a fitting assurance ring having a diameter larger than that of the cap body is connected to a skirt portion of the cap body by a plurality of half-cut bridges, vertical stripes are formed on the outer peripheral surface of the cap body and the outer peripheral surface of the fitting assurance ring. By providing a knurl, in this capping, the cap body and the fitting assurance ring can be simultaneously clamped, and both can be driven and fitted simultaneously, so that even if the half-cut bridge is easily cut, The fitting assurance ring can be so-called hell-tightly fitted strongly to the fitted portion of the bottle extraction opening. Therefore, it is possible to provide a half-cut bridge having an appropriate degree of ease of cutting, and to provide a plastic pill fur proof cap which is superior in quality control in manufacturing.

Further, since the fitting assurance ring having a diameter larger than that of the cap body is connected by a plurality of half-cut bridges, whether or not the half-cut bridge has been cut due to unauthorized opening or the like can be checked from above the cap. Thus, the cap can be easily determined, and a cap having excellent pill fur proof property can be obtained.

Therefore, the present invention exerts an excellent practical effect particularly in applications such as a gable-top type paper container for storing beverages and the like and a cap for closing an extraction port such as a back-in-carton.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing an embodiment of a plastic pill fur proof cap according to the present invention in a side sectional view and a front view.

FIG. 2 is an explanatory view showing a cross section and a front view of an embodiment in which the plastic pill fur proof cap of the present invention is fitted to a bottle extraction opening.

FIG. 3 is an explanatory view showing an embodiment of the plastic pill fur proof cap according to the present invention from above.

FIG. 4 is an explanatory view showing one embodiment of a conventional plastic pill fur proof cap in a side sectional view and a front view.

[Explanation of symbols]

 1 plastic pill fur proof cap 10 cap main body 10a cap bottom hem 10b vertical striped knurl on cap main body outer peripheral surface 20 half-cut bridge 30 fitting assurance ring 30a fitting Vertically striped knurl on the outer surface of the matching assurance ring 40 {bottle extraction port 40a} protruding fitting part 40b} sealing flange

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Akitaka Iwasaki 1-5-1, Taito, Taito-ku, Tokyo Toppan Printing Co., Ltd. F-term (reference) 3E084 AB01 BA01 CA01 CC03 DA01 DB05 DB12 DB20 DC03 FA09 FB01 GA04 GB04 GB08 KA13 KB01 LA01 LA17 LB02 LB07

Claims (1)

[Claims] 1. A plastic pill fur proof (improper opening) in which a fitting assurance ring having a larger diameter than the cap body is connected to the skirt of the cap body and connected to the skirt by a half-cut bridge. A pill fur proof cap made of plastic, wherein a vertical striped groove (knurl) is provided on the outer peripheral surface of the cap body and the fitting assurance ring.