JPH062916Y2 - Metal one-piece cap - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of use) The present invention relates to a metal one-piece cap, and more particularly to a non-sealable one-piece metal cap that is opened by using a tab provided on the cap.

(Prior art and its problems) Conventionally, a metal cap of a type in which a tab is provided in a cap body and the tab body is broken by pulling the tab with a finger or the like to open the cap is generally used as a non-resealable cap. There is.

A so-called one-piece cap in which a cap body and a tab are integrally formed is also known as a metal cap of this type.

Such a metal one-piece cap is generally formed of a soft metal such as aluminum in order to prevent troubles such as hand-cutting, but when the tab is pulled when opening, the tab may bend or the tab itself. It has a serious drawback that it is torn off, making opening difficult or impossible.

The problem that the tab is bent or torn off also occurs when the cap is attached to the neck of the container.

Therefore, it is a technical object of the present invention to provide a metal one-piece cap in which bending and tearing of a tab can be effectively prevented and opening can be easily performed.

(Structure of the Invention) The metal one-piece cap of the present invention comprises a metal cap body formed of a top surface and a skirt portion hanging downward from the periphery of the picture top surface, and a part of the skirt portion. A tab that extends downward and is divided by a weakening line formed in the cap body and is formed integrally with the cap body, the tab being a ring support part and a lower part of the support part. And a ring provided at an end thereof, the ring supporting portion having at least one reinforcing rib extending in a trial direction of the tab, and a curl portion being formed on inner and outer peripheral edges of the ring. In addition, the outer curl portion of the peripheral edge extends to the lower end portion of the ring support portion, and the tip end portions of both ends of the outer curl portion of the circumference are on a straight line between them. the above The lower part of the strong ribs formed on the overlap such positional relationship, characterized in that is.

That is, according to the present invention, the curl portion formed on the inner and outer peripheral edges of the ring forming the tab is a straight line connecting the front end portion (the front end portion extending to the ring support portion) of the curl portion on the outer peripheral edge. Is characterized in that it is extended so as to overlap with the reinforcing ribs, and the reinforcing effect of the reinforcing ribs is remarkably enhanced by such a simple means, and when the tab is pulled up at the time of opening or the cap is put on the container. The present invention succeeds in effectively preventing the occurrence of troubles such as bending and tearing between the ring and the ring support portion when fastening to the mouth portion or during the manufacturing process of the cap.

Of course, also in the conventionally known metal cap, a reinforcing rib is formed on the ring supporting portion and a curl portion is formed on the outer peripheral edge of the ring. However, in the conventional cap,
The reinforcing rib and the tip of the outer peripheral curl portion are separated from each other (the straight line connecting the tip of the curl portion and the lower portion of the rib do not overlap with each other), and no synergistic action between them is observed. It was not possible to effectively prevent the occurrence of trouble between the ring support and the ring support. That is, in the positional relationship between the rib and the curl portion as described above, the rib only prevents the ring support portion itself from bending and being torn off, and the curl portion prevents tearing when pulling the tab. In other words, it merely suppressed the bending of the ring itself. On the other hand, according to the present invention, since the lower portion of the rib and the tip of the curl portion have the above-mentioned positional relationship, the curl portion remarkably enhances the reinforcing effect of the rib at the connecting portion between the ring and the ring support portion. Since the two act synergistically, bending and tearing at the connecting portion can be effectively avoided when the cap is opened.

(Examples) The present invention will be described below based on specific examples shown in the accompanying drawings.

In FIG. 1 showing the whole of the metal one-piece cap of the present invention, the cap includes a cap body 3 composed of a top surface 1 and a skirt portion 2 hanging downward from the periphery of the top surface 1, and a skirt portion. 2 and a tab 4 extending further downward from a part of 2.

A packing (not shown) known per se is provided on the back side of the top surface 1 forming the cap body 3 so as to engage with a mouth portion of a container (not shown) to provide a sealing property.

The skirt portion 2 engages with the neck of a container such as a bottle so that the cap is held on the neck of the container.

The tab is separated from the cap body 3 by a weakening line 10 for opening formed on the top surface 1 and the skirt portion 2. By pulling up the tab 4, the tab 4 and the cap body are separated from each other by the weakening line 10. Peeling occurs, which causes the opening.

In the present invention, the cap body 3 and the tab 4 are integrally formed, and these are generally manufactured from a known cap metal material such as aluminum, tin plate and tin-free steel. In particular, aluminum is most preferably used from the viewpoints of preventing hand tearing and opening property.

Further, in the present invention, the tab 4 is composed of a ring supporting portion 20 and a ring 21 provided at a lower end portion of the supporting portion 20.

When the tab 4 is pulled up when the cap is opened, the portion that tears off is the ring support portion 20 described above, so this ring support portion 20 is provided with reinforcing ribs 22 extending in the direction in which the tab 4 is oriented. . Although only one reinforcing rib 22 is provided in the accompanying drawings, a plurality of reinforcing ribs 22 may of course be provided. The reinforcing ribs 22 are formed by means such as embossing.

As is clear from FIG. 2 showing the back surface of the tab 4, a curl portion 25 is formed on the periphery of the ring 21 to prevent hand-cutting. The straight line 30 connecting 25 ′ and 25 ′ has a positional relationship such that it overlaps with the lower portion of the reinforcing rib 22.
The curl portion 25 extends to the ring support portion 20.

By extending the curl portion 25 in this manner,
The reinforcing effect of the ring support portion 20 is synergistically increased, and tearing of the ring support portion 20 when the cap is opened is effectively prevented.

In the present invention, the tab 4 which constitutes the cap described above.
May be formed so as to face outward, or may be formed so as to hang down substantially parallel to the skirt portion 2, and that state can be arbitrarily determined.

In particular, it is preferable that the cap of the present invention engages and holds the container in a state where the neck portion of the container to be sealed and the tab 4 are closely attached.

Further, in this case, when the tab 4 is pressed so that the ring supporting portion 20 is curved along the shape of the neck portion of the container, the effect that the reinforcing effect of the ring supporting portion 20 is further increased is achieved. When the conventional metal cap is used as described above, since the reinforcing effect of the ring supporting portion is not sufficient, even when the cap is clamped so that its tab closely contacts the neck of the container, This often causes troubles in which the support part is cut off.

Thus, in the cap of the present invention, the ring support portion 20
Is sufficiently reinforced and has sufficient strength to withstand such clamping, so that the above trouble does not occur at all.

Thus, the metal cap of the present invention effectively prevents problems such as tearing of the tab when opening the cap and cutting of the tab when the cap is attached, and is extremely advantageous as compared with the conventional cap.

[Brief description of drawings]

FIG. 1 is a perspective view showing the entire metal one-piece cap of the present invention, and FIG. 2 is a view showing the back side of the tab in the cap of FIG. 1 ... Top surface, 2 ... Skirt part, 3 ... Cap body, 4 ... Tab, 10 ... Weakened line, 20 ... Ring support part, 21 ... Ring, 22 ... Reinforcing rib, 25 ... Curl section.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor, Kinji Fuchie, No. 2-12 Mayoro, Hiratsuka, Kanagawa Prefecture, inside the Hiratsuka Plant, Japan Crown Cork Co., Ltd. (56) Reference JP-A-59-93659 (JP, A) Showa 59-26754 (JP, U) Showa 52-11633 (JP, Y2)

Claims (1)

[Scope of utility model registration request] 1. A metal cap body formed of a top surface and a skirt portion hanging downward from the periphery of the top surface, and a cap extending further downward from a part of the skirt portion. A metal one-piece cap defined by a weakening line formed on a body and integrally formed with the cap body, wherein the tab is provided on a ring support and a lower end of the support. A ring, the ring supporting portion includes at least one reinforcing rib extending in the direction of the tab, and a curl portion is formed on inner and outer peripheral edges of the ring. The outer curl portion of the peripheral edge extends to the lower end portion of the ring support portion, and the tip end portions of both ends of the outer curl portion of the peripheral edge are located on a straight line connecting the two under the reinforcing ribs. Metal piece cap, characterized in that it is formed in a portion overlapping such positional relationship.