JPS629245Y2 - - Google Patents

Description

[Detailed description of the invention] This invention uses a crown-like bottle cap made of plastic, and more specifically, it can be opened easily by pulling a pull piece, and when the bottle is in a tightly closed state, the seal is complete and the contents are not contained. To provide a simple bottle cap that does not cause liquid leakage and is reusable after opening.

A plastic bottle cap having an inner stopper part and a skirt part, the inner stopper part having an outer diameter such that it fits tightly into the mouth of the bottle in a sealed state, and
Bottle caps are known in which the skirt part is provided with an inner thick protruding strip around a part of the inner peripheral side wall so as to fit with the protruding ring strip edge on the outer circumferential side of the bottle neck part.
Publication No. 13109). Furthermore, in addition to the above-mentioned airtight structure, the bottle cap described in this publication is provided with a tensioning tab piece on a part of the skirt part, and by pulling this tensioning knob part, a part of the skirt part can be torn off. In particular, it is constructed so that it can be opened easily. In such a bottle cap, a thin groove is formed in the skirt portion so that a portion of the skirt can be easily torn when the pull tab is pulled to open the bottle.
Therefore, the sealing performance of such bottle caps is not perfect, especially when high temperature liquid is sealed inside the bottle.
If the bottle is exposed to high temperatures or subjected to impact during transportation, the part of the skirt connected to the tension knob and the thin parts on both sides of the skirt may soften or warp to some extent, causing liquid leakage. occurs.

This invention can be easily opened by pulling the tension piece, and a completely sealed state can be obtained, and there is no leakage during capping, storage, and transportation, and furthermore, it can be reused after opening. The purpose is to provide a possible bottle cap.

The bottle cap according to the present invention has an inner plug part 2 formed to tightly fit inside the bottle mouth, and a skirt part 4 that fits on the outer circumferential side of the bottle neck part.
In a plastic bottle cap in which at least a part of the inner circumferential side wall of the plastic bottle cap is provided with an inner thick protruding strip 8 which fits with the protruding ring strip edge 7 on the outer circumferential side of the bottle neck; one of the circumferential edges of the skirt portion 4 Part A is connected to the tension piece 6 via the hinge connecting piece 5; cuts are carved or thin grooves are provided adjacent to both sides of part A of the peripheral edge of the skirt part; part A of the peripheral edge An outer thick protruding strip 9 is provided extending over at least a certain length of the outer peripheral side wall edge of the skirt portion 4, including the outer circumferential wall edge of the skirt portion 4; Straddling the notch or thin groove, both leg portions of a rigid shaped hook 10 are driven into the outer thick convex strip 9, and the surfaces of both leg portions of the hook 10 are is provided with small protrusions or has an uneven surface, and the tension piece 6 is composed of an annular member having a diameter larger than the outer circumference of the skirt portion 4, and the annular member has at least one It is characterized in that it is connected to the skirt portion 4 by a web 12 for indicating that the bottle is unopened.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. The drawings show a preferred specific example of the bottle cap according to the present invention, and FIG. 1 is a perspective view showing the bottle cap 1 and the bottle 16 before capping, and FIG. 2 is a perspective view showing the state when the bottle is opened. It is. However, the shaped hooks are omitted from illustration in both figures. 3 is an enlarged sectional view (taken along the line B--B in FIG. 4) of the main part of the bottle cap 1, and FIG. 4 is an enlarged front view of the main part.

The bottle cap 1 has an inner stopper part 2 and a skirt part 4. The inner stopper part 2 is cylindrically arranged vertically at the lower center of the bottle cap 1, and one or more annular thin-walled fins 13 are arranged on the outer peripheral surface of this cylindrical inner stopper part. Preferably, two or more fins 13 are provided, and the diameter of the fins 13 gradually increases from below the cylindrical inner plug toward the cap body. The mounting intervals of the fins 13 are such that when the fins are bent in one direction, the distance is such that the fins do not overlap with adjacent fins. At the time of sealing, the cylindrical inner plug part 2 is inserted into the mouth of the bottle and comes into close contact with the inner wall of the mouth.

The skirt portion 4 has an inner thick protruding strip 8 protruding from a part of its inner circumferential side wall, which engages with a protruding annular strip edge 7 on the outer circumferential side of the neck portion. When the bottle cap 1 is plugged, the inner thick convex line 8 fits over the convex annular line edge 7 on the outer circumferential side of the bottle neck. Furthermore, when the bottle cap 1 is opened, the inner thick convex line 8 passes over the convex annular line edge 7 on the outer circumferential side of the bottle neck and is released from the fitting. If the inner thick convex strip 8 is provided over substantially most of the inner periphery of the cap/skirt portion 4, it becomes difficult to open the cap. Therefore, the inner thick convex strip 8 faces a portion A of the circumferential edge of the cap/skirt portion that is connected to the hinge connecting piece 5 and the tension piece 6, which will be described later, as well as the portion A (that is, the portion A (diametrically opposite side) protrudes from a part of the inner periphery of the cap/skirt. FIG. 3 shows only the thick protruding strip 8 protruding from the inner peripheral side wall of the above part A, and the thick protruding strip 8 protruding from a part of the inner periphery of the cap/skirt portion facing the above part A. 8 is not shown. If the circumferential length of the thick protruding strip 8 provided on a portion of the inner periphery of the cap skirt section facing the above-mentioned portion A becomes larger than the semicircumference of the cap skirt section 4, it becomes difficult to open the cap. Therefore, it is desirable that its length be approximately equal to or less than the semicircular length of the cap/skirt portion 4.
In particular, it is best that the length be approximately equal to the semicircular circumference.

As shown in FIG. 3, it is preferable that an annular protruding strip 14 is provided on the inner surface of the upper wall of the bottle cap to project downwardly. This annular protrusion 14 comes into close contact with the top edge of the bottle opening when the bottle is sealed, but as shown in FIG.
Since the cross section of the bottle is narrow, the pressure per unit area pressed against the top edge of the bottle mouth is extremely large.

The inner thickness protrusion 8 of the skirt portion 4 explained above,
A bottle cap having both a cylindrical inner stopper portion 2 and an annular protrusion 14 provides a particularly excellent sealing condition. In other words, the internal pressure of the bottle increases when high-temperature liquid is injected into the bottle and the bottle is capped, or when the bottle is exposed to high temperatures during storage and transportation after the bottle is sealed, but the bottle does not fit around the outer periphery of the bottle neck. The thick protrusions 8 of the cap completely prevent the cap from floating. Therefore, the cylindrical inner stopper part 2, especially the cylindrical inner stopper part 2 having the fins 13 arranged on the outer circumferential surface, is held in close engagement with the inner wall surface of the bottle neck, thereby reliably preventing leakage of high-temperature liquid. do. In addition, after injecting and capping a high-temperature liquid, the inside of the bottle becomes depressurized as the liquid contents cool over time, but as the internal pressure decreases, the cap is sucked into the bottle, so the circle on the bottom of the cap The annular protrusion 14 is strongly pressed against the top surface of the upper edge of the bottle. Therefore, outside air is reliably prevented from entering the bottle in a state where the internal pressure is reduced.

A portion A of the peripheral edge of the cap skirt portion 4 is connected to a tension piece 6 via a hinge connection piece 5. When the tension piece 6 is pulled upward when opening the cap, a part A of the circumference of the skirt portion 4 is torn off, and at the same time, the thick protruding strip 8 of the cap skirt portion is detached from the protruding ring strip edge 7 on the outer peripheral side of the bottle neck. The cap is easily opened. In order to facilitate opening, notches 15 are cut adjacent to both sides of part A of the circumference of the skirt portion, or thin grooves (not shown) are formed. In this case, it is preferable to make the notch 15 or the upper adjacent portion of the thin groove thicker in order to prevent the cap skirt portion from expanding upward more than necessary.

The tension piece 6 is attached to the skirt portion 4 as shown in each figure.
It consists of an annular member with a diameter larger than the outer circumference of the ring.
This annular member is connected to the cap skirt portion 4 by one or more webs 12 in addition to the hinge connection piece 5. The web 12 has a narrow cross section so as to be easily broken at at least one of the contact portion with the skirt portion, the contact portion with the annular tension member 6, and the intermediate portion of the web itself. When opening the bottle, pull the annular member 6 to release the web 1.
The cap 1 can be easily removed from the bottle 16 by cutting the connection with the skirt portion 4 via the cap 2, inserting a finger into the annular member and pulling it upward (see FIG. 2). The web 12 has an unopened display function,
To prevent a cap from being opened by illegal means before being delivered from a manufacturer to a consumer.

The main feature of the bottle cap according to the present invention is that it extends over at least a certain length of the outer circumferential wall edge of the skirt portion 4, including the part A of the circumferential edge of the skirt portion, preferably over the entire length of the outer circumferential edge of the skirt portion. , outer thick protrusion 9
is provided in a protruding manner, and both leg portions of the shaped hook 10 are driven into this outer thick convex strip 9. That is,
As shown in FIG. 4, in the sealed state, both legs of the shaped hook 10 are placed at a position close to the notch (or thin groove), straddling part A of the circumference of the skirt part and the above-mentioned notch 15 (or thin groove). is driven into the outer thick protrusion 9. The shaped hook 10 is made of a rigid body having good thermal dimensional stability and high mechanical strength, such as metal or hard heat-resistant plastic.

A thin wall body 11 is provided extending upward from the thick convex strip 9 on a portion A of the circumference of the skirt portion, and a shape hook 10 can be held in the gap between the thin wall body 11 and the outer circumferential wall surface of the skirt portion before plugging. It is preferable to configure it as follows. That is, as shown in FIGS. 3 and 4 with reference numeral 10, a hook is temporarily held in the gap between the thin wall body 11 and the outer circumferential wall surface of the skirt portion, and is pressed against the top surface of the cap during the plugging process. When applying pressure to fit the cap into the bottle opening, if pressing force is also applied to the hook from above, both legs of the hook are driven into the thick ridges 9. With this configuration, the hooks can be inserted simultaneously in the plugging process. Pores for receiving both legs of the hook may be formed in the outer thick protruding strip 9 of the skirt portion. Further, although it is essential that the outer thick convex strip 9 exists at least at the hook driving position, it is desirable to provide it over the entire length of the outer circumferential edge of the skirt portion from the viewpoint of opening workability.

In order to prevent the hook from falling out during storage and transportation of the cap, small protrusions are provided on the surface of both legs of the hook or the surface is made uneven.

As mentioned above, the shape hook is extended outwardly from the thick convex strip 9 across the part A of the skirt that connects to the hinge connecting piece 5.
By driving the cap into the groove, outward radial distortion of the cap skirt is completely prevented. Therefore, even if the bottle cap is exposed to high temperatures and the cap itself becomes soft, or if the cap is subjected to impact, liquid will not leak.

The bottle cap of the present invention has the advantage that although it is easy to open, it exhibits a relatively good tightening force even after opening, so it can be reused. That is, when opening the cap, (1) insert your finger into a tension piece made of an annular member with a diameter larger than the outer circumference of the skirt part and pull it (Fig. 2);
(2) The cap can be opened easily by tearing the notches or thin grooves provided adjacent to both sides of part A of the circumference of the skirt portion. On the other hand, the tightening force of the bottle cap is obtained by the thick convex portions (8 and 9),
Moreover, since the shaped hook does not come off even when the cap is opened, the tightening force of the cap is maintained as it is. Therefore, relatively good sealing performance can be reproduced when the bottle is reused after opening.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the bottle cap 1 and bottle 16 before capping, and FIG. 2 is a perspective view showing the state after opening. 3 is an enlarged sectional view (taken along the line B--B in FIG. 4) of the main part of the bottle cap 1, and FIG. 4 is an enlarged front view of the main part. Reference numbers are as follows. 1... Cap, 2...
...Inner stopper portion, 4...Skirt portion, 5...Hinge connection piece, 6...Tension piece, 7...Convex ring stripe on outer circumferential side of bottle neck, 8...Inner wall thickness protrusion, 9... Outer wall thickness convex strip, 10... Shaped hook, 11... Thin wall body for temporarily holding the hook, 12... Web for indicating unopened bottle, 13
...Annular thin-walled fin, 14...Annular convex strip, 15...
...notch, 16...bottle.

Claims (1)

[Claims for Utility Model Registration] 1. Inner stopper portion 2 formed to fit tightly into the mouth of the bottle.
and a skirt portion 4 that fits on the outer circumferential side of the bottle neck, and at least a part of the inner circumferential side wall of the skirt portion 4 has an inner wall thickness that fits with the convex ring edge 7 on the outer circumferential side of the bottle neck. In a plastic bottle cap having a protruding strip 8, a portion A of the circumference of the skirt portion 4 is connected to the tension piece 6 via a connecting piece 5; adjacent to both sides of the portion A of the circumference of the skirt portion A notch is carved or a thin groove is provided; an outer thick protruding strip 9 is provided extending over at least a certain length of the outer peripheral side wall edge of the skirt portion 4, including a part A of the peripheral edge. In the sealed state, both leg portions of the rigid shaped hook 10 are formed with outwardly thick convex stripes at a position close to the notch or thin groove, straddling part A of the circumference of the skirt portion and the notch or thin groove. 9, and the surface of both legs of the hook 10 is provided with small protrusions or has an uneven surface, and the tension piece 6 is driven into the outer periphery of the skirt portion 4. A bottle cap comprising an annular member having a larger diameter, the annular member being connected to the skirt portion 4 by at least one unopened indicating web 12. 2 The inner wall thickness protrusion 8 is part A of the circumference of the skirt part
Also, the circumferential length of the thick protruding strip 8, which is provided in a protruding manner on a part of the inner periphery of the skirt part facing the part A, and provided in a part of the inner periphery of the skirt part facing the part A, is The bottle cap according to claim 1, which is approximately equal to or less than the semicircular circumference of the skirt portion. 3. A thin wall body 11 is provided extending upward from a portion A of the peripheral edge of the skirt portion, and is configured to clamp the shape hook 10 in the gap between the thin wall body 11 and the outer circumferential wall surface of the skirt portion 4 before corking. A bottle cap according to claim 1 or 2 of the claimed utility model registration. 4. The bottle cap according to any one of claims 1 to 3, wherein the tensioning piece 6 and the connecting piece 5 integrally constitute a tensioning tab tongue. 5. The bottle cap according to any one of claims 1 to 4, wherein an annular protrusion 14 that hangs down from the inner surface of the upper wall of the bottle cap and is in close contact with the top edge of the bottle mouth. bottle cap. 6. The inner plug part 2 is cylindrical and has one or more annular thin-walled fins 13 disposed on its outer peripheral wall surface. Claims 1 to 5
A bottle cap according to any one of paragraphs.