KR102355269B1 - Eco-friendly plastic bottle caps - Google Patents

Abstract

According to one aspect of the present invention, an eco-friendly plastic bottle cap fastened to a bottleneck, where male screw threads and an annular locking protrusion spaced from a lower portion of the male screw threads at a predetermined distance are formed, is disclosed. The eco-friendly plastic bottle cap comprises: a cap body having female screw threads which correspond to the male screw threads and are provided on an inner circumferential surface to be screw-fastened to an upper portion of the bottleneck based on the annular locking protrusion in a fastened state; a fixing ring inserted into a lower portion of the bottleneck based on the annular locking protrusion in the fastened state and having a plurality of locking protrusion units which are formed on an inner circumferential surface of the fixing ring and locked by the annular locking protrusion; and a bending line having a plurality of connection units formed to connect a lower end of the cap body and an upper end of the fixing ring and having a slit formed between the adjacent connection units. A plurality of cutting grooves extended from the slit to a direct previous portion of a lower end of the fixing ring are formed in the fixing ring. When the cap body is rotated and lifted in a direction where screw fastening of the male screw threads and the female screw threads is released, the cutting grooves are widened by assistance of the bending line to allow the locking protrusion units to cross the locking protrusions.

Description

Eco-friendly plastic bottle caps

The present invention relates to a plastic bottle cap, and more particularly, comprising a cap body screwed to an upper portion of the bottle neck and a fixing ring secured to the lower portion of the bottle neck by being caught on a sill at the lower portion of the bottle neck, wherein the cap body is screwed It relates to an eco-friendly plastic bottle cap that can easily separate not only the cap body but also the fixing ring from the bottle neck just by unscrewing it in the opposite direction.

In general, plastic bottles composed of a bottle neck and a bottle body are produced, distributed, and sold in a state where the entrance is blocked by a bottle cap fastened to the bottle neck. The bottle cap is screwed to the bottle neck by the female thread formed on the inner peripheral surface of the bottle cap and the male thread formed on the outer peripheral surface of the bottle neck. And, by rotating the bottle cap in the opposite direction to the original fastening direction and raising it, the bottle cap can be separated from the container. Recently, in order to confirm that a consumer opens the bottle cap of a final product for the first time, a bottle cap composed of a fixing ring still remaining on the bottle neck after separation of the bottle cap and a cap body separated from the bottle neck are used as one body. These bottle caps exist in a state in which the fixing ring and the cap body are integrally connected in the process of production, distribution, and sales.

On the other hand, since the plastic bottle cap is made of a material different from that of the bottle, it is necessary to separate the bottle cap and the bottle for recycling. However, even if the bottle cap is removed, since the fixing ring remains on the bottle neck of the bottle, for recycling, an operation of separating the fixing ring, which is a part of the bottle cap, from the bottle neck is required. However, there was a problem that this work was very cumbersome and uneconomical. On the other hand, after removing the cap body, which is a part of the bottle cap, various techniques have been proposed for allowing the fixing ring to be easily separated from the bottle neck. However, in the prior art, the inconvenience and inconvenience that the fixing ring separation operation must be additionally performed was still there.

Utility model publication 20-2015-0001931 (disclosure date May 20, 2015)

The problem to be solved by the present invention is to integrally include a cap body screwed to the upper part of the bottleneck and a fixing ring fixed to the lower part of the bottleneck by being caught on the sill at the lower part of the bottleneck, and loosening the cap body in the opposite direction to the screw fastening direction. The goal is to provide an eco-friendly plastic bottle cap that can be easily separated from the bottle neck as well as the cap body by just manipulation.

An eco-friendly plastic bottle cap according to an aspect of the present invention is fastened to a bottle neck having a male screw thread and an annular locking jaw that is spaced apart by a predetermined distance on the lower part of the male screw thread. a cap body screw-fastened to the upper portion of the bottle neck based on the annular locking jaw; a fixing ring fitted in the lower part of the bottle neck with respect to the annular locking jaw in the fastening state, and having a plurality of locking protrusions on an inner circumferential surface of the annular locking jaw caught on the annular locking jaw; and a bending line including a plurality of connecting portions formed to connect the lower end of the cap body and the upper end of the fixing ring, and having a slit formed between adjacent connecting portions, wherein the fixing ring starts from the slit and the fixing ring A plurality of incision grooves extending until reaching the lower end of flared, allowing the locking projections to cross the locking jaw.

According to an embodiment, the cut-out grooves are expanded, and the lower remainder of each of the cut-out grooves is cut.

According to an embodiment, two or more connecting portions exist between two adjacent cutout grooves.

The bottle cap according to the present invention includes a cap body screwed to the upper portion of the bottle neck and a fixing ring fixed to the lower portion of the bottle neck by being caught on a clasp. It has the advantage that both the cap body and the retaining ring can be easily separated from the bottleneck. Therefore, the present invention can solve the environmental problem caused by the container and the fixing ring having different materials are thrown away together. In addition, it is very economical because it is possible to dramatically reduce the cost of recycling due to the additional removal of the fixing ring for recycling of the bottle.

1 is a cross-sectional view showing a state in which a bottle and a bottle cap are combined;
2 is an exploded cross-sectional view showing the bottle and the bottle cap in a disassembled state;
3 and 4 are perspective views showing the bottle cap from different directions,
5 is a front view showing the bottle cap, and when the bottle cap is detached, the force of opening the incision groove is indicated by arrows;
6 is a cutaway perspective view showing the bottle cap;
7 is a cross-sectional view taken along AA of FIG. 6 ;
8 is a front view showing a bottle cap according to another embodiment of the present invention;
9 is a view for explaining another embodiment of the present invention,
10 is a photograph showing a state in which the bottle cap is fastened to the bottle neck;
11 is a photograph showing a state in which the coupling between the bottle cap and the bottle neck is released.

Hereinafter, with reference to the accompanying drawings, embodiments of the present invention will be described in detail so that those of ordinary skill in the art can easily carry out the present invention. The present invention may be embodied in several different forms and is not limited to the embodiments described herein.

In addition, terms specifically defined in consideration of the configuration and operation of the present invention may vary depending on the intention or custom of the user or operator. These terms should be interpreted as meanings and concepts consistent with the technical spirit of the present invention based on the contents throughout this specification.

In order to clearly explain the present invention, the description of parts not related to the technical idea of the present invention is omitted, and the same reference numerals are given to the same or similar elements throughout the specification.

1 is a cross-sectional view showing a state in which the bottle and the bottle cap are combined, FIG. 2 is an exploded cross-sectional view showing the bottle and the bottle cap in an exploded state, and FIGS. 3 and 4 are perspective views showing the bottle cap from different directions 5 is a front view showing the bottle cap, and when the bottle cap is removed, the force to open the incision groove is indicated by arrows, FIG. 6 is a cutaway perspective view showing the bottle cap, and FIG. 7 is FIG. 6 It is a cross-sectional view taken along AA of

1 to 7 , the bottle includes a bottle neck 2 , and the bottle cap 1 is screwed and detachably fastened to the bottle neck 2 . The bottle may be made of, for example, a PET material, and the bottle cap 1 may be made of, for example, a PE material.

The bottleneck (2) includes a bottleneck ring (21). It can be distinguished from the body part of the bottle by the bottle neck ring 21 . A male screw thread 22 is formed on the outer peripheral surface of the bottle neck 2 , and an annular locking jaw 23 is formed between the lower end of the male screw thread 22 and the bottle neck ring 21 .

The annular locking jaw 23 is formed on the outer peripheral surface of the bottle neck 2 , and has an outer diameter slightly smaller than that of the bottle neck ring 21 . It is preferable that the annular stopping protrusion 23 includes an inclined surface on the upper part, which is an inner circumferential surface of the fixing ring when the bottle cap 1 in which the cap body and the fixing ring are integrated is coupled to the bottle neck 2 in the product packaging step. The locking projections formed on the can easily cross the annular locking jaw 23 and be caught under the annular locking jaw 23 .

The structure of the bottleneck 2 as described above is adopted in an almost standardized form. Accordingly, the bottle cap 1 provided according to the present embodiment can be applied to most currently produced bottles, in particular, PET bottles, without any design change.

On the other hand, the bottle cap 1 includes a cap body 100 and a fixing ring 200, and the cap body 100 and the fixing ring 200 are integrally formed from the time of molding.

The cap body 100 has a structure with a closed upper end and an open lower end, and a female thread 120 corresponding to the male thread 22 of the bottle neck 2 is formed on the inner circumferential surface. As mentioned above, since the external thread 22 is formed on the upper outer peripheral surface of the bottleneck 2 with respect to the annular locking jaw 23 , the cap body 100 is the bottleneck with respect to the annular locking jaw 23 . (2) is screwed into the upper part.

As used herein, the term “fastened state” is shown in FIG. 1 as meaning a fastening state before the initial bottle cap is separated by a consumer.

In addition, the fixing ring 200, in the fastening state, is configured to be fitted in the lower portion of the bottle neck 2 with respect to the annular locking jaw 23, and a plurality of hooks caught on the annular locking jaw 23 on the inner circumferential surface. The locking protrusions 230 are formed.

The plurality of engaging protrusions 230 are located below the female thread 120, and when the bottle cap 1 is coupled in the production stage, with the help of elastic deformation of the fixing ring 200, the annular engaging In order to easily cross the inclined surface provided on the upper part of the jaw 23, an inclined surface is formed in the lower part.

In addition, the plurality of locking protrusions 230 are formed at regular intervals over the entire inner periphery of the fixing ring 200 . In addition, each of the locking protrusions 230 may extend while forming a line (circular arc) shape.

In addition, the bottle cap 1 according to the present embodiment includes a plurality of connecting portions 320 formed to connect the lower end of the cap body 100 and the upper end of the fixing ring 200 and adjacent connecting portions 320 . A bending line 300 with an elongated slit 340 formed therebetween is included.

Conventionally, a perforated line including a connection part provided between the slits and the neighboring slits is provided between the cap body and the fixing ring. As the perforation line between the fixing ring and the cap body, which maintains a fixed state under the chin, was torn, that is, as the connecting parts were cut, the fixing ring and the cap body were separated, and the fixing ring had to be fixed to the bottleneck as it was.

However, according to the present embodiment, cutting at the bending line 300 does not have to occur, and when the locking protrusion 230 starts to cross the annular locking jaw 23 , the fixing ring with respect to the bending line 300 is a reference. 200 is bent outward as indicated by the imaginary line and arrow in FIG. 2 , and as the incision grooves 250 are spread left and right as indicated by the arrows in FIG. 5 , the lower remainder of the incision groove 250 is finally By cutting 252 , the bottle cap 1 may be separated from the bottle neck 2 in a state in which the cap body 100 and the fixing ring 200 are not separated.

Each of the cutout grooves 250 starts from the slit 340 provided in the bending line 300 and extends until reaching the lower end of the fixing ring 200 . The lower residual portion 252 is a portion remaining below the lower end of the cutout groove 250, and remains uncut when the bottle cap 1 is fastened to the bottle neck 2, but is disconnected while the bottle cap 1 is fastened to the bottle neck 2 , a part configured to be cut by the expansion of the incision groove 250 . At this time, the lower residual portion 252 has a smaller thickness than other portions of the fixing ring 250 including, for example, a notch structure so that it can be easily cut.

In other words, when the cap body 100 rotates and rises in a direction in which the screw fastening of the male thread 22 and the female thread 120 is released, the cutout grooves 250 and the bending line 300 are formed. ), the locking protrusions 230 start to easily pass over the annular locking jaw 23, and in this process, the lower remainder 252 of the cutout groove 250 is Since it is cut by slitting, the cap body 100 and the fixing ring 200 connected by the bending line 300 including the plurality of slits 340 and the connection parts 320 are not separated without the cap body 100. and the fixing ring 200 may be well separated together.

Even during the expansion of the incision groove 250 and the cutting (or rupture) of the lower residual part 252, the connection parts 320 provided in the bending line 300 are not broken without the cap body 100 and the fixing ring ( 200), it is advantageous to keep the connection between them. To this end, it may be considered to increase the width of the connection part 320 or reduce the width of the slit 340 compared to the prior art. In addition, in this embodiment, in order to well maintain the above connection state, two or more connection parts 320 are configured to exist between two adjacent cutout grooves 250 and 250 . This allows the connection parts 320 to maintain the fixing ring 200 well without impairing the function as a bending line for bending the fixing ring 200 outward.

7, in this embodiment, five cut-out grooves 250 are formed at regular intervals over a 360 degree section, and between two adjacent cut-out grooves 250 and 250, two connection parts ( 320 and 320) are located. At this time, the interval between the two connection parts 320 and 320 located together in the section between the two cut-out grooves 250 and 250 and the two adjacent connection parts 320, belonging to two different sections defined by the two cut-out grooves, 320) is preferably smaller than the interval between them.

8 is a front view showing a bottle cap according to another embodiment of the present invention.

Referring to FIG. 8 , the size of the lower residual portion 252 existing below the incision groove 250 is increased, and two or more rupture holes 253 are formed in the lower residual portion 252 , and in the fastened state , while preventing the lower remaining part 252 from being cut well, and in the process of opening the bottle cap 1, that is, in the process of separating the bottle cap 1 from the bottle neck by releasing the screw, the cut-out groove 250 The lower remainder 252 of the is configured to be well cut (ruptured) with the aid of the rupture holes 253 .

In addition, the width of the connecting portion 320 provided on the bending line 300 is determined to be larger than that of the previous embodiment, which prevents the connecting portion 320 provided on the bending line 300 from being cut well. At this time, since the bending hole 322 is formed in the connection part 320 , the connection part 320 may be bent well.

9 is for explaining another embodiment of the present invention. Referring to FIG. 9 , a notch 327 is formed on the outer surface of the connection part 320 so that the connection part 320 can be bent outwardly. composed.

10 and 11 are actual photos of the bottle cap container according to the present invention.

Note that the present invention is not limited by the above-described embodiments and can be practiced with various modifications.

2: bottleneck 22: male thread
23: annular snag 100: cap body
120: female thread 200: retaining ring
230: hooking protrusion 300: bending line
320: connection 340: slit
250: incision groove

Claims (3)

In the eco-friendly plastic bottle cap fastened to the bottle neck (2) formed with an annular locking jaw (23) spaced a predetermined distance from the male screw thread (22) and the lower part of the male screw thread (22),
The cap body 100 is provided with a female thread 120 corresponding to the male thread 22 on the inner circumferential surface, and is screwed to the upper portion of the bottle neck 2 based on the annular locking jaw 23 in the fastened state. );
In the fastening state, the fixing ring 200 is fitted to the lower portion of the bottle neck 2 with respect to the annular stopping protrusion 23, and a plurality of stopping protrusions 230 are formed on the inner circumferential surface of the annular stopping protrusion 23. ; and
A bending line 300 including a plurality of connecting portions 320 formed to connect the lower end of the cap body 100 and the upper end of the fixing ring 200 and having a slit 340 formed between the adjacent connecting portions 320 . ), including
A plurality of incision grooves 250 are formed in the fixing ring 200, each extending from the middle portion between both ends of the slit 340 until reaching the lower end of the fixing ring 200,
A lower residual portion 252) is present between each of the cut-out grooves 250 and the lower end of the fixing ring 200,
When the cap body 100 rotates and rises in a direction in which the screw fastening of the male thread 22 and the female thread 120 is released, the cutting groove 250 with the help of the bending line 300 . Eco-friendly plastic bottle cap, characterized in that the locking protrusions 230 are allowed to cross the annular locking jaw 23 by cutting the lower residual part 252 by being widened so that the left and right widths increase as each goes down. . delete The eco-friendly plastic bottle cap according to claim 1, wherein two or more of the connection parts (320) exist between two adjacent cutout grooves (250).

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