JPH09290845A - Cap structural body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make improvements on sealability and prevention of turning- together on making heat filling to a bottle for a cap structural body to be put on a plastic bottle to be filled with foodstuffs such as seasoning, edible oil, vinegar, refined sake and etc., and to make the external appearance beautiful for such cap structural body. SOLUTION: In this cap structural body to be fitted onto a mouth 21 of a plastic bottle for plugging the mouth 21, the cap structural body is made of a plastic material being softer more than that for the bottle 2. A sharp tapered protuberance 24 is provided at least at one point on the surface of a support ring 23 of the bottle 2 while a rib 15 is provided at the lower cover 1 of the cap structural body in a way of dangling from and running round the lower end of an external cylindrical skirt 14 of the lower cover, and the lower cover 1 is stuck and held to the mouth 21 of the bottle with the protuberance 24 thrust onto the rib 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cap component, which is a cap component to be used by being fitted on a plastic bottle filled with seasonings such as mirin, sauce, soy sauce, dressing and the like, edible oil, vinegar, sake and the like. In particular, the present invention relates to a cap structure having a beautiful appearance that prevents co-rotation and improves sealing performance when hot filling a bottle.

[0002]

[Prior art and its problems] Conventionally, seasonings, edible oil, vinegar,
A plastic cap used by stoppering a plastic bottle filled with sake or the like is, for example, a lower lid a interposed between a bottle mouth portion b and an upper lid c as shown in FIG. Inner cylinder skirt a by plugging
The bulging portion b2 of the bottle mouth portion b is fitted into the fitting groove a3 formed in 1 and the outer cylinder skirt a2 so as to be closely held, but the bottle is filled with the contents by heat (65 ~ 75
)), The lower lid a is deformed along with the heat history of the lower lid a and loosens above the support ring b1 with the bottle mouth b. When the upper lid c is rotated, the lower lid a is said to rotate together. It is easy to cause a phenomenon.

Therefore, one or a plurality of triangular pyramidal ribs b3 are formed on the lower side of the bulging portion b2 of the bottle mouth portion b fitted in the fitting groove a3 of the lower lid a to cause the co-rotation phenomenon. However, this method has a problem that the sealing property between the lower lid a and the bottle mouth b is inferior.

Further, in the conventional example shown in a sectional view on the half side in FIG. 5, in order to prevent a co-rotation phenomenon, an outer cylinder skirt a2 for sandwiching the bulging portion b2 of the bottle mouth b between the fitting grooves a3. A ring collar a-1 made of polypropylene or the like is fitted on the outer side of the support to prevent the lower lid a from being deformed due to heat history, and to suppress the phenomenon of co-rotation above the support ring b1. ing. However, this method is not preferable because it increases the number of steps involved in attaching the ring collar a-1 which is a separate member, resulting in an increase in cost.

[0005]

DISCLOSURE OF THE INVENTION The present invention is to solve the above-mentioned problems, and the gist thereof is a cap structure which is plugged into the mouth of a plastic bottle and fitted into the mouth of the bottle. In the above, the cap structure is made of a softer plastic than the bottle, and at least one sharp conical protrusion is provided on the upper surface of the support ring of the bottle. A rib is hung around the lower end of the outer cylinder skirt of the lid, and the projection is bited into the rib to hold the lower lid in close contact with the bottle mouth portion. The outer peripheral surface of the rib provided around the lower end of the cap is formed inside the outer peripheral surface of the outer cylinder skirt.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below with reference to the drawings. 1 shows an embodiment of the present invention in a side sectional view, FIG. 2 shows an essential part of the embodiment of the present invention in an enlarged sectional view and a side view of a circle in FIG. 1, and FIG. Another embodiment is shown in a side sectional view.

As shown in the side sectional views of FIGS. 1 to 3, the present invention relates to a cap structure which is plugged into the mouth portion 21 of a plastic bottle 2 and fitted into the bottle mouth portion 21.
The cap structure is made of a softer plastic than the bottle 2, and at least one sharp tapered projection 24 is provided on the upper surface of the support ring 23 of the bottle 2 and the cap structure is formed. Lower lid 1
A rib 15 is provided around the lower end of the outer cylinder skirt 14 so that the protrusion 24 is bited into the rib 15 to hold the lower lid 1 in close contact with the bottle mouth 21. Further, the outer peripheral surface of the rib 15 provided around the lower end portion of the outer cylinder skirt 14 of the lower lid 1 is formed inside the outer peripheral surface of the outer cylinder skirt 14.

The material of the bottle 2 used in the present invention is a thermoplastic resin having a relatively high hardness such as polyethylene terephthalate or polyacrylonitrile. Thermoplastics that are softer than the bottle 2, that is, have relatively low hardness such as polyethylene and polypropylene are preferably used.

According to the present invention, a sharp tapered tip projection 24 formed on the upper surface of the support ring 23 of the bottle 2 is provided.
The lower lid 1 is bited into the lower end of the outer cylinder skirt 14 of the lower lid 1, and the lower lid 1 is held in close contact with the bottle mouth portion 21 so that the contents of the bottle 2 are filled with heat. It is possible to prevent co-rotation, improve the sealing property, and improve the appearance of the fitted portion between the bottle mouth portion 21 and the lower lid 1.

[0010]

(Embodiment 1) As shown in a side sectional view of FIG. 1 and an enlarged side sectional view and a side view of an essential part of FIG. A lower lid 1 made of polyethylene having a low hardness and a male screw portion 12 formed on the upper portion of the lower lid 1.
The bottle 2 has a polypropylene upper lid 3 having an internal thread portion 31 that is screwed onto the lower lid 1. The bottle 2 having a bottle mouth portion 21 that is attached to the lower portion of the lower lid 1 is made of polyethylene terephthalate having a relatively high hardness. It consists of That is,
The lower lid 1 has a male screw portion 12 formed on the upper portion thereof, and a spouting cylinder 11 formed with a partition wall 17 having a tearing portion 18 and a pull ring 19 attached to the inside thereof. An inner cylinder skirt 13 and an outer cylinder skirt 14 are formed on the lower part of 1 continuously from the male screw portion 12,
A fitting groove 16 is provided between the inner cylinder skirt 13 and the outer cylinder skirt 14.
Are formed.

A rib 15 is provided around the lower end of the outer cylinder skirt 14 of the lower lid 1 so as to extend downward from the lower end. It is preferably formed thinner than the tubular skirt 14. That is, the outer peripheral surface of the rib 15 is formed so as to be recessed inward from the outer peripheral surface of the outer cylinder skirt 14, and preferably, the rib 15 is formed so as to gradually incline toward the lower side.
Further, on the upper surface of the support ring 23 provided around the bottle mouth portion 21 to which the lower lid 1 is fitted, sharp projections 24 in a tapered shape are provided at two positions on the left and right in FIG.

On the bottle mouth portion 21 of the bottle 2, the upper lid 3
When the lower lid 1 screwed on is plugged, as shown in the sectional view and the side view in FIG. 2, the inner cylinder skirt 13 of the lower lid 1 is relatively soft.
As shown by the broken line, the rim portion 22 of the relatively hard bottle mouth portion 21 is slightly reduced on the outer wall surface of the outer cylinder skirt 14 and the inner wall surface of the outer cylinder skirt 14, and at the same time, the sharp tip constriction formed on the support ring 23 is formed. -Shaped projections 24 bite into the ribs 15 provided around the outer cylinder skirt 14 and securely engage with the ribs 15 to prevent co-rotation associated with heat filling of the contents into the bottle 2 and seal this portion. be able to. Since the broken end of the rib 15 at the sealed portion is formed at a position retracted inward from the outer peripheral surface of the lower lid 1, it is absorbed by the outer peripheral surface of the lower lid 1 and has a beautiful appearance. Become.

(Embodiment 2) Another embodiment of the present invention will be described with reference to FIG. That is, as shown in the side sectional view of FIG. 3, the cap structure according to the second embodiment of the present invention includes a lower lid 1 made of polyethylene having a relatively low hardness, and fitted over the lower lid 1 via a hinge 32. The upper lid 3 and the bottle lid 21 of the bottle 2 made of polyethylene terephthalate having a relatively high hardness, which is attached below the lower lid 1. That is, the lower lid 1 is provided with a partition wall 17 having a tear-off portion 18 formed inside the pouring tube 11 formed on the upper portion thereof and having a pull ring 19 attached thereto. Inner cylinder skirt 13 and outer cylinder skirt 14 continuous to the cylinder 11.
Are formed to hang down, and the inner cylinder skirt 13 and the outer cylinder skirt 1
A fitting groove 16 is formed between the four.

At the lower end of the outer cylinder skirt 14 of the lower lid 1, a rib 15 formed thinner than the outer cylinder skirt 14 is provided so as to hang down. That is, the outer peripheral surface of the rib 15 is recessed inward from the outer peripheral surface of the outer cylinder skirt 14 and is formed so as to be gradually inclined inward toward the lower side. Further, on the upper surface of the support ring 23 provided around the bottle mouth portion 21 to which the lower lid 1 is fitted, a sharp tapered projection 24 is provided.
It is provided at one location on the right side in the figure.

When the lower lid 1 is plugged into the bottle mouth portion 21 of the bottle 2 made of polyethylene terephthalate, a sharp tapered projection 24 formed on the support ring 23.
However, it bites into the ribs 15 provided around the outer cylinder skirt 14 of the lower lid 1 made of polyethylene and securely engages with the ribs 15 to prevent co-rotation accompanying the heat filling of the contents in the bottle 2 and this portion. Can be sealed. The broken end of the rib 15 at the sealed portion is the same as in the first embodiment.
Since it is formed at a position retracted inward from the outer peripheral surface of the, the outer surface of the lower lid 1 absorbs it and the appearance becomes beautiful.

The present invention is not limited to the above embodiment, but a sharp tapered projection 24 formed on the upper surface of the support ring 23 of the bottle 2 made of a relatively hard material.
Includes a cap component that bites into a rib 15 that is hung around the lower end of the outer cylinder skirt 14 of the lower lid 1 made of a relatively soft material to hold the lower lid 1 in close contact with the bottle mouth portion 21. Therefore, it is possible to prevent co-rotation associated with heat filling the contents of the bottle 2, improve the sealing property, and improve the appearance of the engaging portion between the bottle mouth portion 21 and the lower lid 1. is there.

[0017]

Since the present invention has the above-described structure, the following effects can be obtained. That is, the sharp tapered projection formed on the upper surface of the bottle support ring bites into the rib that is hung around the lower end of the outer cylinder skirt of the lower lid to hold the lower lid in close contact with the mouth of the bottle. As a result, it is possible to prevent the co-rotation accompanying the heat filling of the contents into the bottle and to improve the sealing property, and the appearance of the fitted portion between the bottle mouth portion and the lower lid becomes excellent, etc. It is effective.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention in a side sectional view.

FIG. 2 is a cross-sectional view and a side view showing an enlarged view of the inside of a circle of FIG.

FIG. 3 is a side sectional view showing another embodiment of the present invention.

FIG. 4 shows a conventional example in a half-section side sectional view.

FIG. 5 shows another example of the related art in a half-divided side sectional view.

[Explanation of symbols]

 1 Lower Lid 11 Outlet Cylinder 12 Male Threaded Part 13 Inner Cylinder Skirt 14 Outer Cylinder Skirt 15 Rib 16 Fitting Groove 17 Partition Wall 18 Tear Part 19 Pull Ring 2 Bottle 21 Bottle Mouth 22 Mouth Edge 23 Support Ring 24 Protrusion 3 Upper Lid 31 Female Thread Part 32 hinge

Claims (2)

[Claims] 1. A cap structure which is plugged into the mouth part of a plastic bottle and fitted into the mouth part of the bottle, wherein the cap structure is made of a softer plastic than the bottle, and the support of the bottle is supported. At least one sharp conical protrusion is provided on the upper surface of the ring, and a rib is hung around the lower end of the outer cylinder skirt of the lower lid of the cap structure so that the protrusion is formed on the rib. A cap structure characterized in that the lower lid is held in close contact with the mouth of the bottle by biting. 2. The cap structure according to claim 1, wherein the outer peripheral surface of the rib provided around the lower end of the outer cylinder skirt of the lower lid is formed inside the outer peripheral surface of the outer cylinder skirt.