JPS6242916Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention is a metal cap for sealing the mouth of a glass container, more specifically a cut-off metal cap generally called a maxi cap, as shown in FIG. As shown in the figure, a disc-shaped top part with a cut-off line,
A cylindrical skirt provided around the top, a part of the skirt connected to the cutoff line of the top and surrounded on both sides by the cutoff line provided on the skirt, and a part extending downward from there. A tab consisting of,
And, a tear-off type metal product consisting of a knob extending outward diagonally downward or laterally from the bottom end of the tab, which can be opened by pulling up the knob and cutting off the portion surrounded by the tab and the tear line at the top. This invention relates to improvements to caps (hereinafter referred to as ``maxi caps'').

[Conventional technology]

Generally, to seal the mouth of a glass container,
Various caps have been used. For narrow-mouthed bottles, crown or screw-on caps are used, and for wide-mouthed bottles, tear-off caps or the aforementioned maxi caps are used.

Further, improved techniques regarding such maxi caps are disclosed in Japanese Patent Laid-Open Nos. 51-66081, 1982-125084, and the like.

JP-A-51-66081 discloses that one or more depressions (hollow protrusions) are provided from the tab to the knob in order to reinforce the tab and the knob. Publication No. 125084 discloses that in order to reduce the force during cutting, a round connecting part is provided between the top and the skirt part, the gap between the cutting lines on both sides of the tab is smoothly widened by the round connecting part, and further, Expanding the perforation line of the top connected to it along the circumference of the top, and when pulling the knob sideways to cut the perforation line on both sides of the tab, especially in the round connection.
It is disclosed that the tabs are provided with ribs to provide leverage.

[Problem that the invention attempts to solve]

Tear-off caps attached to wide-mouth bottles need to be opened carefully along the long circumferential tear line of the bottle mouth to avoid cutting the metal piece, whereas maxi caps Since the cutting direction is parallel to the axis of the bottle and the cutting line is short, it is easy to open and is expected to be used in many wide-mouthed bottles.

However, when opening a maxi cap, it is necessary to hold the cap knob attached to the bottle opening as shown in the partial side view of Figure 3.
As shown in the figure, pull horizontally outwards from the container to tear the bottom edge of the tear lines provided on both sides of the tab, then gradually pull the knob upwards as shown in Figure 5. The cap is then opened by cutting further along the tear line, cutting off the tab and the part surrounded by the tear line at the top, but even each cap has instructions to ``pull it toward you''. However, general consumers
As shown in FIG. 6, it is common to grasp the knob and immediately pull it upward. As a result, the base of the knob or tab often broke off, making it impossible to open the package without using tools such as pliers. When we investigated this kind of cutting phenomenon, we found that it frequently occurs at the connection between the tab and the knob, and that once the tear lines on both sides of the tab are torn, it is cut off relatively smoothly after that, and the occurrence is decreasing. I understood.

Therefore, the above-mentioned problems can be solved by the
As disclosed in Japanese Patent No. 52-125084, changing the shape of the perforation line does not solve the problem, and if the tab is provided with ribs to provide rigidity, the tab becomes difficult to bend and becomes easy to break. In addition, the above-mentioned Unexamined Patent Publication No. 51
- As disclosed in Publication No. 66081, when one or more hollow protrusions are provided from the tab to the knob,
Although it is effective to some extent, the tab is cut from the end, so the effect is not sufficient, and the hollow protrusion is crushed when the cap is rolled up, so the effect is diminished in that area.

[Means for solving problems]

In order to solve these problems, the inventor of the present invention has developed a maxi cap in which the base of the knob is made into a convex shape with the center line of the knob as the axis, as shown in Figure 1. The present invention provides a cut-off metal cap that can be cut off.

The base of the knob refers to the part of the knob excluding the finger ring, and a convex shape centered on the center line of the knob means that the protruding part of the convex surface is parallel to the center line of the knob.
In addition, the shape of the cross section in the vertical plane is an arc, an inverted U.
A shape such as a letter or an inverted V-shape, where the center part is a curved line that protrudes upward.

Therefore, the connecting portion between the tab and the knob does not form an arc on a horizontal plane having approximately the same curvature as the outer periphery of the bottle neck as shown in FIG. 2, but instead, as shown in FIG. The central part forms a curved line that projects outward and upward.

[Effect]

By adopting such a structure, the maxi cap according to the present invention exhibits the following effects.

Even if a general consumer carelessly pulls the knob upwards, as shown in FIGS. 10 (a straight line perpendicular to the paper surface in Figures 7 and 8) as the axis, from the bottle side (left in Figures 7 and 8) to the outside laterally (right in Figures 7 and 8)
As a result of the rotation, the knob is pulled laterally outward, and the tension force that pulls the knob upward acts as a force that tears the lower ends of the perforation lines 8 on both sides of the tab.

Additionally, if the metal that makes up the tab and knob has strong elasticity, the tab, which has a convex surface protruding outward at the center, will deform into a concave surface due to the elasticity of the metal at both ends. The force also acts to tear the bottom edge of the tear line on each side of the tab.

Furthermore, since the base of the knob is formed in a convex shape with the center line of the knob as its axis, the knob can be endowed with the rigidity required to exert the above-mentioned function.

〔Example〕

FIG. 1 is a perspective view of a maxi cap according to one embodiment of the present invention, and FIGS. 7 and 8 are partial side views illustrating its unsealed state.

In these figures, 1 is the top, 2 is the skirt, and 3
is the tab, 4 is the knob, 5 is the finger ring, 6 is the base of the knob, 7 is the cut line on the top, 8 is the cut line on the skirt part, 9 is the connection between the tab and the knob, 10 is the center part, 11 is the Both ends are shown.

The maxi cap according to this embodiment includes a disc-shaped top portion 1 provided with a perforation line 7, a cylindrical skirt portion 2 provided around the top portion 1, and a cylindrical skirt portion 2 provided on the skirt portion 2 connected to the perforation line 7 on the top portion. Cutting line 8
It consists of a tab 3 consisting of a part of a skirt part surrounded on both sides by a skirt part and a part extending downward from the skirt part, and a knob 4 extending outwardly and obliquely downward from the lower end of the tab 3. It is a tear-off metal cap that can be opened by pulling up on the knob and cutting off the part surrounded by the tab and the tear line on the top. It has a cylindrical convex surface. the result,
The connecting portion 9 between the tab and the knob has a curved shape in which a central portion 10 protrudes outward and obliquely upward from both end portions 11.

〔effect〕

The tear-off metal cap according to the present invention has the structure and function described above, so that even if a general consumer carelessly pulls the knob upward, part of the force is absorbed by the tab and the knob. On both sides of the connection, the force is converted to an outward pull, allowing the lower end of the tear line to be easily torn off and preventing the base or tab of the knob from being torn to pieces.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a maxi cap according to one embodiment of the present invention, FIG. 2 is a perspective view of a conventional maxi cap, and FIGS. 3 to 6 are:
FIG. 7 is a partial side view illustrating a conventional maxicap in an unsealed state, and FIGS. 7 and 8 are partial side views illustrating an unsealed maxicap according to the present invention. In these figures, 1 is the top, 2 is the skirt, and 3
is the tab, 4 is the knob, 5 is the finger ring, 6 is the base of the knob, 7 is the cut line on the top, 8 is the cut line on the skirt part, 9 is the connection between the tab and the knob, 10 is the center part, 11 is the Both ends are shown.

Claims (1)

[Scope of utility model registration request] A disc-shaped top part with a cut-off line, a cylindrical skirt part provided around the top part, and a part of the skirt part surrounded on both sides by the cut-off lines connected to the cut-off line of the top part and provided in the skirt part. A tab consisting of a section and a section extending downward from the tab, and a knob extending outward diagonally downward or to the side from the bottom end of the tab, and when the knob is pulled up, the section surrounded by the tab and the cutting line at the top. In a tear-off metal cap that can be opened by cutting it off,
A cut-off metal cap characterized by the base of the knob having a convex shape centered around the center line of the knob.