WO2008063037A1

WO2008063037A1 - The opening of beverage vessel with stopper

Info

Publication number: WO2008063037A1
Application number: PCT/KR2007/006000
Authority: WO
Inventors: Soung An Yang
Original assignee: Soung An Yang
Priority date: 2006-11-24
Filing date: 2007-11-26
Publication date: 2008-05-29
Also published as: KR100789491B1

Abstract

The invention relates to an opening structure of a beverage vessel which is capable of solving the problems encountered in known beverage vessels made of flexible polyethylene, for example, problems in that it is inconvenient to remove a stopper from a beverage vessel and in that the contents of the beverage vessel are likely to spill when the beverage vessel is opened. The invention provides an improved opening structure for a beverage vessel, which allows the beverage vessel to be opened in a safe and easy manner.

Description

Description THE OPENING OF BEVERAGE VESSEL WITH STOPPER

Technical Field

[1] The present invention relates to an opening structure of a beverage vessel, and more particular to an opening structure of a beverage vessel having a stopper, which is capable of solving the problems that users usually encounter when opening typical beverage vessels made of polyethylene, which is a flexible material, for example the problems in which it is difficult to remove the stopper and in which the contents in the beverage vessel are likely to spill when the beverage vessel is opened, and thus is capable of allowing the beverage vessel to be opened in a safe and stable manner. Background Art

[2] General beverage vessels have a sealed structure in the form of a bottle, a can, or a paper pack.

[3] Recently developed beverage vessels are made of flexible synthetic resin, in which polyethylene is the main substance, and the use thereof is gradually increasing.

[4] Such a beverage vessel is formed by laminating an inner layer of polyethylene with a plurality of specific material layers including paper, and the outermost layer thereof is generally made of polyethylene.

[5] There are several ways of forming an opening structure of a polyethylene vessel. In the case of relatively small beverage vessels, a cover- and- stopper structure may not be used from the viewpoints of cost and usefulness. That is, the contents of the small beverage vessel are generally drunk in one gulp and thus it is not necessary to close the opening of the small beverage vessel again once the beverage vessel has been opened.

[6] Fig. 16 shows a known opening structure of a beverage vessel 1. The beverage vessel 1 is provided with a cutting portion 4, which is very thin so that it can be easily torn, and a holding portion 5 which is connected with the cutting portion 4 and which extends in one direction from the cutting portion 4.

[7] When a user holds the holding portion 5 and pulls it upward, the cutting portion 4 is torn and the beverage vessel is opened.

[8] This opening structure has the advantage of a simple structure but also has a disadvantage in that the contents of the beverage vessel are likely to spill and stain the skin or clothing of a user because they are generally shaken when the user applies force to the beverage vessel in order to open the beverage vessel.

[9] Further, since even the small beverage vessel generally has a volume of 200 milliliters or more, there is the likelihood that some people will want to drink the beverage contained in the small beverage vessel in several stages, depending on the individual, rather than drinking the entire beverage in one gulp. In such a case, the beverage in the open beverage vessel may be exposed to the air for some period. Accordingly, some customers who want to drink the beverage slowly and do not want their beverage to be exposed to the air while some of the beverage remains do not choose the beverage due to the vessel form. Disclosure of Invention Technical Problem

[10] The invention is provided in order to solve the above-described problems, and one object of the invention is to provide an improved opening structure of a beverage vessel that allows the beverage vessel to be opened easily and safely.

[11] Another object of the invention is to provide an opening structure of a beverage vessel that enables an opening of a beverage vessel to be closed after the beverage has been opened once, and that can enhance the convenience of use and the competitiveness of products. Technical Solution

[12] In order to achieve the objects of the invention, according to one aspect of the invention, there is provided an opening structure of a beverage vessel with a stopper, which has a main body made of flexible polyethylene and is opened by cutting an openable portion of an upper portion of the beverage vessel, comprising: the protruding openable portion having an upper portion that protrudes from the upper surface of the beverage vessel, both sides of which are parallel to each other and are perpendicular to the upper surface of the beverage vessel, a pair of guide rails 21 provided on lower end portions of respectively sides, in a manner of being depressed inward a predetermined depth and extending in an anteroposterior direction, a first cutting portion which consists of strips extending in the anteroposterior direction parallel to each other with a predetermined distance therebetween and which is relatively thin, a second cutting portion connected between both front ends of the first cutting portion, and a protruding portion which is disposed slightly behind the second cutting portion, protrudes upward from the upper surface, and is provided with a penetration hole serving as a hook eye oriented in the anteroposterior direction; and a guide cap formed to correspond to the upper surface of the protruding openable portion, the guide cap having back and side surfaces which vertically extend downward from the upper surface of the protruding openable portion and which are disposed to be adjacent to and correspond to the back and side surfaces of the protruding openable portion, guide protrusions corresponding to the guide rails formed on the side surfaces of the extended portion, an extending portion which vertically extends from a front portion by a height which is equal to the height of the protruding portion, and a hook to be inserted into the hook eye, which extends backward.

[13] According to another aspect of the invention, there is provided an opening structure of a beverage vessel with a stopper which has a main body made of flexible polyethylene and is opened by cutting an openable portion provided to an upper portion of the main body, comprising: the protruding openable portion, having an upper portion that protrudes from the upper surface of the beverage vessel, two sides that are parallel to each other and perpendicular to the upper surface of the beverage vessel, a pair of guide rails 21 provided to lower end portions of respective sides in a manner of being depressed inward a predetermined depth and extending in an anteroposterior direction, an insertion groove which is depressed down from the upper surface of the openable portion so as to form a step while providing a peelable portion which is to be selectively peeled off along cut lines, and a protruding portion which is disposed at the front portion of the peelable portion so as to protrude from the upper surface of the peelable portion, and which is provided with a penetration hole serving as a hook eye oriented in the anteroposterior direction; and a guide cap formed to correspond to the upper surface of the protruding openable portion, the guide cap having back and side surfaces which vertically extend downward from the upper surface of the protruding openable portion and which are disposed to be adjacent to and correspond to the back and side surfaces of the protruding openable portion, guide protrusions corresponding to the guide rails formed on the side surfaces of the extended portion, an extending portion which vertically extends from a front portion by a height which is equal to a height of the protruding portion, a hook to be inserted into the hook eye, which extends backward, and an insertion portion (r) which is to be inserted into the insertion groove and which is integrally formed with the lower end portion the guide cap.

[14] According to a further aspect of the invention, there is provided an opening structure of a beverage vessel with a stopper which has a vessel with a cover coupling portion in a tube form, which is provided at an upper portion of the vessel, and a cover which is coupled to the cover coupling portion and which opens the vessel by cutting an openable portion provided to an upper portion of the cover coupling portion, comprising: a protruding openable portion which is provided to an inclined upper surface of the cover so as to protrude a predetermined height from the inclined upper surface and which includes guide rails on respective sides thereof, a peelable portion provided on and depressed from the upper surface thereof in a stepwise manner while providing an insertion groove thereon, and a protruding portion disposed at a front portion of the peelable portion so as to protrude upward, and provided with a hook eye which is a penetration hole oriented in the anteroposterior direction; and a guide cap having an upper surface corresponding to the upper surface of the protruding openable portion, back and side surfaces which perpendicularly extend downward from the upper surface thereof and which correspond to back and side surfaces of the openable portion, guide protrusions provided to respective side surfaces so as to correspond to the guide rails, a front portion which perpendicularly extends downward from the upper surface thereof a predetermined height, which is equal to that of the protruding portion, and a hook which is to be inserted into the hook eye which extends backward, in which an insertion portion (r) to be inserted into the insertion groove is integrally formed with the lower end of the guide cap.

[15] According to a still further embodiment of the invention, there is provided an opening structure of a beverage vessel with a stopper which includes a vessel with a tube- shaped cover coupling portion at an upper portion thereof and a cover coupled to the cover coupling portion of the vessel structured to be opened by being cut, comprising: a protruding openable portion which is provided to an upper surface, which is a curved surface, of the cover so as to protrude from the upper surface, and which includes guide rails provided on respective sides thereof, a peelable portion which is to be selectively peeled off along a cutting line and which is provided so as to be depressed from the upper surface of the protruding openable portion in a stepwise manner while providing an insertion groove thereon, and a protruding portion which protrudes from the upper surface of the peelable portion at the front portion of the peelable portion and has a hook eye, which is a penetration hole oriented in the anteroposterior direction; and a guide cap having an upper surface corresponding to the upper surface of the protruding openable portion, back and side surfaces which perpendicularly extend downward from the upper surface thereof and which correspond to back and side surfaces of the openable portion, guide protrusions provided to respective side surfaces so as to correspond to the guide rails, a front portion which perpendicularly extends downward from the upper surface thereof a predetermined height, which is equal to that of the protruding portion, and a hook which is to be inserted into the hook eye which extends backward, in which an insertion portion to be inserted into the insertion groove is integrally formed with a lower end of the guide cap.

[16] The features and advantages of the invention will be apparent from the following description with reference to the accompanying drawings. The terms used in the specification and claims of the invention may not refer exclusively to dictionary definitions, but may refer to meanings and concepts in accordance with the technical spirit of the invention on the ground that an inventor can act as his or her own lexicographer in order to explain his or her invention in the best way.

Advantageous Effects [17] According to the beverage vessel of the invention, the beverage vessel is opened when the guide cap, provided to an upper portion of the beverage vessel, is pushed. Accordingly, the opening structure of the beverage vessel has an advantage in that the risk of the beverage vessel being shaken, and thus the contents of the beverage spill when the beverage vessel is opened, is decreased because the beverage vessel is opened by a stable operation.

[18] Further, the opening of the beverage can be closed by the guide cap when some of the beverage remains in the beverage vessel after drinking some of the beverage, so that it is possible to prevent the beverage in the beverage vessel from being contamin ated with dust by decreasing the time during which the beverage contacts the air, and thus it is possible to enhance the convenience of use of the beverage vessel and market competitiveness. Brief Description of the Drawings

[19] FIG. 1 is an exploded perspective view according to one embodiment;

[20] FIG. 2 is a partial sectional view illustrating a guide cap according to the embodiment of the invention;

[21] FIG. 3 is a conceptual diagram according to the invention;

[22] FIGs. 4 to 7 are perspective views illustrating a protruding openable portion according to another embodiment;

[23] FIG. 8 is a perspective view illustrating a protruding openable portion according to a further embodiment;

[24] FIG. 9 is an exploded perspective view illustrating a protruding openable portion according to a still further embodiment;

[25] FIG. 10 is a sectional view taken along line "A-A" shown in FIG. 9;

[26] FIG. 11 is an exploded perspective view illustrating a beverage vessel according to another embodiment;

[27] FIG. 12 is a sectional view taken along line "B-B" shown in FIG. 11;

[28] FIG. 13 is an exploded perspective view illustrating a beverage vessel according to a further embodiment;

[29] FIGs. 14 and 15 are sectional view taken along line "C-C" shown in FIG. 13; and

[30] FIG. 16 is a conceptual diagram illustrating an opening structure of a known beverage vessel.

[31] <Brief Description of the Key Elements of the Drawings>

[32] 1: Beverage vessel

[33] 2: Protruding openable portion

[34] 3: Guide cap

[35] 21: Guide rail [36] 22: First cutting portion

[37] 23: Second cutting portion

[38] 24: Hook eye

[39] 25: Protruding portion

[40] 26: First foldable grooves

[41] 31: Guide protruding portion

[42] 32: Hook

Best Mode for Carrying Out the Invention

[43] The present invention will be described in detail in a manner such that people ordinarily skilled in the art can easily understand and reproduce the invention with reference to the accompanying drawings.

[44] It is to be noted that like elements or components in the drawings are referenced by like reference symbols as far as possible. A detailed explanation of known functions or structures included in the invention is omitted in order to prevent the subject of the invention from being obscured.

[45] FIG. 1 is an exploded perspective view according to one embodiment of the invention, FIG. 2 is a partial sectional view illustrating a guide cap according to the embodiment of the invention, and FIG. 3 is a conceptual diagram according to the embodiment of the invention. A beverage vessel according to the embodiment of the invention shown in these figures has a body made of a flexible material such as polyethylene, and the beverage vessel is opened by cutting an openable portion provided to the upper portion of the main body.

[46] The opening structure of the beverage vessel includes the protruding openable portion 2, the upper surface of which perpendicularly protrudes from the upper surface of the beverage vessel 1 to a predetermined height, and both sides of which are parallel to each other and perpendicular to the upper surface of the protruding openable portion 2. A pair of guide rails 21 is provided to lower portions of both sides of the protruding openable portion 2 in a manner of being depressed inward a predetermined depth, and extends in the anteroposterior direction of the beverage vessel 1. The upper surface of the protruding openable portion 2 is provided with a first cutting portion 22, which consists of two strips which extend parallel to each other in the anteroposterior direction and which are relatively thin compared with other portions, and a second cutting portion 23, formed to be connected with both front ends of the two strips of the first cutting portion 22. The protruding openable portion 2 is further provided with a protruding portion 25 protruding from the upper surface thereof, which is slightly behind the second cutting portion 23. The protruding portion 25 has a hook eye 24 which is a penetration hole oriented in an anteroposterior direction. [47] The opening structure of the beverage vessel 1 further includes a guide cap 3 having an upper surface corresponding to the upper surface of the protruding openable portion 2. In the guide cap 3, a back surface and both side surfaces perpendicularly extend downward from the upper surface thereof. The back and side surfaces are adjacent to the back and side surfaces of the protruding openable portion 2, respectively. The side surfaces are provided with guide protrusions 31 corresponding to respective guide rails 21. The front portion of the guide cap 3 extends downward from the edge of the upper surface by a height corresponding to the height of the protruding portion 25. A hook member 32 to be inserted into the hook eye 24 is provided to the inside surface of the front portion of the guide cap 2 in a manner of extending in a backward direction.

[48] In the above-mentioned structure, a user can open the beverage vessel by holding and pushing the upper portion of the guide cap 3 backward. That is, the upper portion of the guide cap 3 is pushed, the hook 32 is inserted into the hook eye 24 so that the guide cap 3 is not separated from the beverage vessel without the application of external force, and the first cutting portion 22 and the second cutting portion 23 are cut by the force which steadily pushes the protruding portion 25. Thus, the beverage vessel is finally opened.

[49] Thanks to the above-mentioned structure, the holding and pushing operation is easy.

Accordingly, the shaking of the beverage vessel 1 is suppressed to the minimum when the beverage vessel is opened, and thus it is possible to prevent the beverage contained in the beverage vessel from spilling due to the sudden jolt.

[50] After some of the beverage is drunk, the opening of the beverage vessel can be closed by pushing the guide cap 3 forward. Accordingly, it is possible to decrease the time during which the beverage contacts the air and thus to prevent the beverage from being contaminated. Accordingly, it is possible to overcome the problems with known beverage vessels made of the same material.

[51] Further, if the guide cap 3 is manufactured with high precision, it is possible to perfectly seal the beverage vessel again.

[52] The guide protrusion 31 is tapered overall toward a trailing end thereof, and has a leading end in the form of a short pair of jaws.

[53] In the above embodiment, the guide cap 30 is assembled at the final stage after manufacturing the beverage vessel 1 including the protruding openable portion 2. Upon assembling, the guide cap 30 slips along the tapered plane and then the guide protrusions 31 thereof are inserted into the guide rails 21, so that the guide cap 30 is not separated from the beverage vessel 1.

[54] In the embodiment, the second cutting portion 23 and the protruding portion 25 have an arc shape overall, which protrudes toward the front side of the beverage vessel 1. In the embodiment, an opening is formed as a point when the guide cap 3 starts to be pushed, and gradually expands to a plane. Accordingly, force required to form the opening is decreased. [55] Accordingly, the beverage vessel 1 is opened by cutting the cutting portions from the foremost position of the arc of the second cutting portion 23. [56] FIGs. 4 to 7 are perspective views illustrating a protruding openable portion of an opening structure of a beverage vessel according to another embodiment of the invention. FIG. 4 shows an embodiment in which a second cutting portion 23 and a protruding portion 25 have an arc shape depressed to face away from the front side of the beverage vessel. [57] According to this embodiment, the beverage vessel starts to be opened from the position where the second cutting portion 23 and the first cutting portion 22 meet. [58] FIG. 5 shows an embodiment in which the second cutting portion 23 and the protruding portion 25 have a triangle shape formed by two inclined lines extending from one point, the foremost portion of the protruding point 25, to the other two points, the front ends of the strips of the first cutting portion 22. [59] According to this embodiment, the starting point of the opening is relatively sharp compared with other embodiments, and thus the cutting portions are easily cut. [60] FIG. 6 shows an embodiment in which an area of the upper portion of the beverage vessel, which is demarcated by a first cutting portion 22 and a second cutting portion

23, has a plurality of first foldable grooves 26 each extending in a horizontal direction. [61] The first foldable grooves 26 cause the area demarcated by the first cutting portion

22 and the second cutting portion 23 to be folded at regular intervals so that the area of the upper portion of the beverage vessel is brought into close contact with the guide cap 3, and thus the formation of the opening is not inhibited. [62] FIG. 7 shows an embodiment in which an inner area, demarcated by a first cutting portion 22 and a second cutting portion 23, has a hemispherical shape protruding upward. [63] According to this embodiment, thanks to the hemispherical area protruding upward, foldable grooves may not be formed in the area demarcated by the first cutting portion

22 and the second cutting portion 23. [64] FIG. 8 is a perspective view illustrating a protruding openable portion according to a further embodiment of the invention. The upper surface of the protruding openable portion 2 is inclined in a manner such that the height thereof is decreased from the front portion to the back portion of the beverage vessel. [65] The back portion of the upper surface of the protruding openable portion 2 and the front portion of the upper surface of the protruding openable portion 2 may have different heights, so that they form a step. [66] This allows the folded portions to be easily received therein so that the guide cap 2 is easily operated. This structure can be also applied to all the embodiments described above.

[67] FIGs. 9 and 10 show a beverage vessel according to another embodiment of the invention. According to this embodiment, a peelable portion 20 is formed in a protruding openable portion 2 in a stepwise form and an insertion groove g is provided therein. Further, a guide cap 3 has an insertion portion r at a lower end portion thereof, so that the insertion portion r of the guide cap 3 is inserted into the insertion groove g of the protruding openable portion 2.

[68] That is, like the above-mentioned embodiments, the beverage vessel of this embodiment has a main body made of flexible polyethylene and is manufactured so as to be opened by cutting the protruding openable portion on the upper portion of the main body. The beverage vessel includes the protruding openable portion 2 and the guide cap 3.

[69] The protruding openable portion 2 protrudes from the upper surface of the main body of the beverage vessel 1 by a predetermined height. The two sides of the protruding openable portion 2 are parallel to each other and perpendicular to the upper surface of the beverage vessel 1. A pair of guide rails 21 is provided to lower end portions of the two sides of the protruding openable portion 2 in a manner such that the guide rails 21 are depressed inward by a predetermined depth and are oriented in an anteroposterior direction. A peelable portion 20 is formed on the protruding openable portion 2 in a stepwise form, and an insertion groove g is provided therein. Further, a protruding portion 25 provided with a penetration hole which is oriented in an anteroposterior direction and which serves as a hook eye 24 is disposed at a front end portion of the peelable portion 20 in a manner such that it protrudes from the upper surface of the protruding openable portion.

[70] As shown in the figures, it is preferable that the insertion groove g be open at the back portion thereof so that the back portion of the insertion groove g interferes with the movement of the guide cap 3 when the guide cap 3 is moved in order to peel the peelable portion 20. The insertion groove g may have a cutting line extending along the border thereof so that the peelable portion 20 can be easily peeled off. The cutting line may be formed through a known method, and thus a detailed description of the method will be omitted.

[71] The guide cap 3 has an upper surface corresponding to the upper surface of the protruding openable portion 2. The back and side surfaces of the guide cap 3 extend downward perpendicular to the upper surface of the protruding openable portion 2. Guide protrusions 31 corresponding to the pair of guide rails 21 are provided to the inside surface of an extended portion of the guide cap 3. A front portion of the guide cap 3 perpendicularly extends downward from the upper surface thereof by a pre- determined height corresponding to the height of the protruding portion 25. The guide cap 130 has a hook 32 that is inserted into the hook eye 24. The hook 32 is formed to extend from the inside surface of the extending portion in a backward direction. The guide cap 130 has an insertion portion r to be inserted into the insertion groove g at the lower end portion thereof. This is similar to the above-mentioned embodiment, and thus a detailed description thereof will be omitted.

[72] FIGs. 11 and 12 show a beverage vessel according to a further embodiment of the invention. The beverage vessel 1 has a tube-shaped cover coupling portion 1' on the upper portion thereof to discharge the contents of the beverage portion therethrough, and a cover 2' which is coupled to the cover coupling portion 1' and is structured in a manner such that an openable portion thereof is cut to form an opening.

[73] The cover 2' has an upper surface which is an inclined surface 2'. The cover 2' has a protruding openable portion 2 which protrudes from the upper surface of the cover 2' and includes guide rails 21 provided to both sides thereof. The upper surface is formed to be stepwise, and has a peelable portion 20 to be selectively peeled along a cutting line. An insertion groove g is provided on the peelable portion 20. A protruding portion 25 protrudes from the upper surface of the peelable portion 20 at the front side of the peelable portion 20, and has a hook eye 24 which is a penetration hole oriented in the anteroposterior direction.

[74] A guide cap 3 coupled to the cover 2' in a screwing manner has an upper surface corresponding to the upper surface of the protruding openable portion 2. The back and side surfaces of the guide cap 3 vertically extend downward so as to correspond to and be adjacent to the back and side surfaces of the protruding openable portion 2. Guide protrusions 31 corresponding to the guide rails 21 are formed on the surfaces of an extended portion. A front portion vertically extends downward by a height which is equal to the height of the protruding portion 25, and a hook 32 for insertion into the hook eye 24, is provided to the inside surface of the front extended portion so as to extend backward. An insertion portion r to be inserted into the insertion groove g is integrally formed with a lower portion of the guide cap 3. This structure is similar to the above mentioned embodiments, so a detailed description is omitted.

[75] FIGs. 13 to 15 show a beverage vessel according to a still further embodiment of the invention. The beverage vessel 1 has a tube-shaped cover coupling portion 1', which protrudes from the upper end portion of the beverage vessel to discharge the contents of the beverage vessel 1 therethrough, and a cover 2', which is coupled to the cover coupling portion 1 ' of the beverage vessel 1 and which is structured to open the beverage vessel 1 by cutting the openable portion.

[76] That is, as shown in the figures, this embodiment includes the beverage vessel 1 and the cover 2'. The cover 2' has a protruding openable portion 2 which protrudes upward so as to have a curved upper surface 2'. The upper surface of the protruding openable portion 2 is provided with guide rails 21 on both sides thereof. The upper surface of the protruding openable portion 2 is further provided with a peelable portion 20, which is depressed downward in a stepwise form and is selectively peeled off along a cutting line. Furthermore, an insertion groove g is provided in the peelable portion 20. Still further, a protruding portion 25 is disposed at a front portion of the peelable portion 20 so as to protrude from the upper surface of the peelable portion 20, and has a hook eye 24 which is a penetration hole oriented in the anteroposterior direction.

[77] A guide cap 3 is mounted on the protruding openable portion 2 so as to be slidable.

The guide cap 3 has an upper surface corresponds to the upper surface of the protruding openable portion 2, and the back and side surfaces vertically extend downward so as to correspond to the back and side surfaces of the protruding openable portion 2, and are disposed to be adjacent to the back and side surfaces of the protruding openable portion 2. Guide protrusions 31 corresponding to the guide rails 21 are formed on the side surfaces of the extended portion. A front portion of the extended portion vertically extends downward by a height which is equal to the height of the protruding portion 25. A hook 32, to be inserted into the hook eye 24, is formed on the inside surface of the front extended portion so as to extend backward. An insertion portion r to be inserted into the insertion groove g is integrally formed with a lower end portion of the guide cap 3.

[78] Although exemplary embodiments of the present invention have been shown and described, it will be apparent to those having ordinary skill in the art that a number of changes, modifications, or alterations to the invention as described herein may be made, none of which depart from the spirit of the present invention. All such changes, modifications and alterations should therefore be seen as falling within the scope of the present invention.

Claims

[1] An opening structure of a beverage vessel with a stopper, which has a main body made of flexible polyethylene and is opened by cutting an openable portion of an upper portion of the beverage vessel, comprising: the protruding openable portion (2) having an upper portion which protrudes from an upper surface of the beverage vessel (1), both sides which are parallel to each other and perpendicular to the upper surface of the beverage vessel (1), a pair of guide rails 21 provided to lower end portions of respective sides in a manner of being depressed inward by a predetermined depth and extending in an anteroposterior direction, a first cutting portion (22) which consists of strips extending in the anteroposterior direction parallel to each other, with a predetermined distance therebetween, and which is relatively thin, a second cutting portion (23) connected between both front ends of the first cutting portion (22), and a protruding portion (25) which is disposed slightly behind the second cutting portion (23), protrudes upward from the upper surface, and is provided with a penetration hole serving as a hook eye (24) oriented in the anteroposterior direction; and a guide cap (3) formed to correspond to the upper surface of the protruding openable portion (2), the guide cap having back and side surfaces which vertically extend downward from the upper surface of the protruding openable portion (2) and which are disposed to be adjacent to and correspond to back and side surfaces of the protruding openable portion (2), guide protrusions (31) corresponding to the guide rails (21) formed on the side surfaces of the extended portion, an extending portion which vertically extends at a front portion by a height which is equal to a height of the protruding portion (25), and a hook (32) to be inserted into the hook eye (24), which extends backward.

[2] The opening structure of a beverage vessel with a stopper according to claim 1, wherein an upper surface of the protruding openable portion (2) is inclined down in a manner such that a height thereof decreases from a front portion to a back portion thereof.

[3] The opening structure of a beverage vessel with a stopper according to claim 1, wherein a back portion of an upper surface of the protruding openable portion (2) is lower than and has a step down from a front portion of the upper surface of the protruding openable portion in a height direction.

[4] The opening structure of a beverage vessel with a stopper according to claim 1 or

2, wherein the guide protrusion 31 has a leading end in a short jaw form and is tapered in a manner such that a width thereof decreases toward an opposite end thereof.

[5] The opening structure of a beverage vessel with a stopper according to claim 1 or

3, wherein the second cutting portion (23) and the protruding portion (25) have an arc that is convex in a forward direction.

[6] The opening structure of a beverage vessel with a stopper according to claim 1 or

3, wherein the second cutting portion (23) and the protruding portion (25) have an arc form that is concave in a rearward direction.

[7] The opening structure of a beverage vessel with a stopper according to claim 1 or

3, wherein the second cutting portion (23) and the protruding portion (25) have a triangle shape with one point positioned at a front portion and two points positioned at front ends of the first cutting portion (22) and on inclined lines connected with the one point at the front portion.

[8] The opening structure of a beverage vessel with a stopper according to claim 1 or

3, wherein an inner region bordered by the first cutting portion (22) and the second cutting portion (23) has formed therein a plurality of first foldable grooves (26) each extending in a horizontal direction.

[9] The opening structure of a beverage vessel with a stopper according to claim 1 or

3, wherein an inner region bordered by the first cutting portion (22) and the cutting portion (23) has a hemispherical shape protruding upward.

[10] An opening structure of a beverage vessel with a stopper which has a main body made of flexible polyethylene and is opened by cutting an openable portion provided to an upper portion of the main body, comprising: the protruding openable portion (2) having an upper portion which protrudes from an upper surface of the beverage vessel (1), both sides which are parallel to each other and perpendicular to the upper surface of the beverage vessel, a pair of guide rails 21 provided to lower end portions of respective sides in a manner of being depressed inward by a predetermined depth and extending in an anteroposterior direction, an insertion groove (g) which is depressed down from the upper surface of the openable portion (2) so as to form a step while providing a peelable portion (20) which is to be selectively peeled off along cut lines, and a protruding portion (25) which is disposed at a front portion of the peelable portion (20) so as to protrude from the upper surface of the peelable portion (20) and which is provided with a penetration hole (24), serving as a hook eye (24), oriented in the anteroposterior direction; and a guide cap (3) formed to correspond to the upper surface of the protruding openable portion (2), the guide cap having back and side surfaces which vertically extend downward from the upper surface of the protruding openable portion (2) and which are disposed to be adjacent to and correspond to back and side surfaces of the protruding openable portion (2), guide protrusions (31) corresponding to the guide rails (21) formed on the side surfaces of the extended portion, an extending portion which vertically extends at a front portion by a height which is equal to a height of the protruding portion (25), a hook (32) to be inserted into the hook eye (24), which extends backward, and an insertion portion (r) which is to be inserted into the insertion groove (g) and which is integrally formed with a lower end portion of the guide cap (3).

[11] The opening structure of a beverage vessel with a stopper according to claim 10, wherein a back portion of the insertion groove (g) is open so that it does not interfere with movement of the guide cap (3) when the guide cap (3) is moved.

[12] An opening structure of a beverage vessel with a stopper which has a vessel (1) with a cover coupling portion (V) in a tube form, which is provided at an upper portion of the vessel (1), and a cover (2') which is coupled to the cover coupling portion (V) and which opens the vessel (1) by cutting an openable portion provided to an upper portion of the cover coupling portion (V), comprising: a protruding openable portion 2 which is provided to an inclined upper surface (2' a) of the cover (2') so as to protrude from the inclined upper surface (2' a) by a predetermined height and which includes guide rails (21) on both sides thereof, respectively, a peelable portion (20) provided on and depressed from the upper surface thereof in a stepwise manner while providing an insertion groove (g) therein, and a protruding portion (25) disposed at a front portion of the peelable portion (20) so as to protrude upward and provided with a hook eye (24), which is a penetration hole, oriented in the anteroposterior direction; and a guide cap (3) having an upper surface corresponding to the upper surface of the protruding openable portion (2), back and side surfaces which perpendicularly extend downward from the upper surface thereof and which correspond to back and side surfaces of the openable portion (2), guide protrusions (31) provided to respective side surfaces so as to correspond to the guide rails (21), a front portion which perpendicularly extends downward from the upper surface thereof by a predetermined height, which is equal to that of the protruding portion (25), and a hook (32) which is to be inserted into the hook eye (24), which extends backward, in which an insertion portion (r) to be inserted into the insertion groove (g) is integrally formed with a lower end of the guide cap (3).

[13] An opening structure of a beverage vessel with a stopper which includes a vessel

(1) with a tube- shaped cover coupling portion (V) at an upper portion thereof and a cover (2') coupled to the cover coupling portion (V) of the vessel (1) structured to be opened by being cut, comprising: a protruding openable portion (2) which is provided to an upper surface (2'b), which is a curved surface, of the cover (2') so as to protrude from the upper surface (2'b), and which includes guide rails (21) provided on respective sides thereof, a peelable portion (21), which is to be selectively peeled off along a cutting line and which is provided so as to be depressed from the upper surface of the protruding openable portion in a stepwise manner while providing an insertion groove (g) therein, and a protruding portion (25) which protrudes from the upper surface of the peelable portion (20) at a front portion of the peelable portion (20) and has a hook eye (24) which is a penetration hole oriented in the anteroposterior direction; and a guide cap (3) having an upper surface corresponding to the upper surface of the protruding openable portion (2), back and side surfaces which perpendicularly extend downward from the upper surface thereof and which correspond to back and side surfaces of the openable portion (2), guide protrusions (31) provided to respective side surfaces so as to correspond to the guide rails (21), a front portion which perpendicularly extends downward from the upper surface thereof by a predetermined height, which is equal to that of the protruding portion (25), and a hook (32), which is to be inserted into the hook eye (24), which extends backward, in which an insertion portion (r), to be inserted into the insertion groove (g), is integrally formed with a lower end of the guide cap (3).