JPH08696U - Gas barrier sheet for cap with tearing member - Google Patents

Abstract

(57) [Summary] [Purpose] A downward protrusion 2 is provided on a synthetic resin base 1.
In addition, in a cap with a tearing member, which is provided with a mounting portion 3 to a container and a cylindrical spout 5, and a tear groove 6 is formed in a base 1 in the spout 5 to have a tearing member 8. A gas barrier sheet 9 is embedded inside the protrusion 2 and inside the substrate 1. Further, there is provided a gas barrier sheet for a cap with a tearing member, in which the gas barrier sheet 9 does not partly come out of the projection 2 when the tearing member 8 is pulled to break the tear groove 6. . [Structure] A downward protrusion 2 is provided on a synthetic resin base 1,
In addition, a cap with tearing member, which is provided with a mounting portion 3 to a container and a cylindrical spout 5, forms a tear groove 6 in a base 1 in the spout 5, and constitutes a tearing portion 7 having a tearing member 8, In a gas barrier sheet 9 having a gas barrier property higher than that of polyethylene for embedding in the projecting portion 2, an outer peripheral portion thereof is bent obliquely downward to form an umbrella-shaped portion 10, and the umbrella-shaped portion 10 is obliquely downwardly directed. A large number of irregularities 11 were formed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a gas barrier sheet for a cap with a tear member used for a cap of a container.

[0002]

[Prior art]

 Although it is not shown in the drawing because it is well known in the past, a synthetic resin cap has a fissure formed in its mouth wall, a pull ring is provided on the upper inside of the fissure, and the pull ring is pulled to pull out the spout. In the cap of the type that forms a gas barrier sheet, the cap is in contact with the lower surface of the mouth wall, and the outer peripheral portion is a protrusion on the outer peripheral portion of the mouth wall.

[0003]

[Problems to be solved by the device]

 However, since the gas barrier sheet is usually formed in a flat plate shape, when it is cast on the protrusion on the outer peripheral portion of the mouth wall as described above, when the pull ring is pulled to form the spout, the gas barrier sheet is partially formed. In some cases, the gas barrier sheet remains uncut along the fissures without being cut properly, and thus the openings do not open in the fissures.

The present invention has been made to solve such a problem, and an object thereof is to obtain a gas barrier sheet that can fix the outer peripheral portion of a gas barrier sheet to a cap so as not to come off easily.

[0005]

[Means for Solving the Problems]

 This invention for achieving the above-mentioned object is described as follows: a base 1 made of synthetic resin is formed with a downward protruding portion 2 and a mounting portion 3 for a container is formed, and a cylindrical spout 5 is formed on the base 1. The base of the tear member cap in which the endless tear groove 6 is formed inside the spout 5 of the base 1, and the tear member 8 is provided on the tear portion 7 inside the tear groove 6. 1. A gas barrier sheet 9 having a gas barrier property higher than that of polyethylene, which is to be provided on the inner side of 1 and has the end portion embedded in the protrusion 2, is formed by bending the outer peripheral portion of the gas barrier sheet 9 obliquely downward. A gas barrier sheet for a cap with a tear-off member, characterized in that the umbrella-shaped portion (10) is formed, and at the same time, a large number of obliquely downwardly facing ridges (11) are formed in the umbrella-shaped portion (10) in a substantially wavy shape. .

[0006]

[Action]

 This invention is constructed as described above, and in the gas barrier sheet 9 to be provided inside the base 1, the outer peripheral portion of the gas barrier sheet 9 is bent obliquely downward to form the umbrella-shaped portion 10, and at that time, By forming a large number of diagonally downward convex-concave stripes 11 in the umbrella-shaped portion 10 in a substantially wavy shape, this is provided inside the cap, and the umbrella-shaped portion 10 is embedded in the downward-projecting portion 2 of the cap, When the tearing member 8 is pulled to cut the fissure 6 to form the spout, the corrugated portion at the end portion of the gas barrier sheet 9 is naturally compared to the inside of the umbrella-shaped portion 10. In addition, since the wave peaks of the corrugated portion are high, the wave troughs are deep, and the widths of the wave peaks and valleys are long, this sheet 9 is used as the corrugated portion of the umbrella-shaped portion 10. If a force is applied in the direction to pull out the strip 11, The end portion of the umbrella-shaped portion 10 of the gut 9 has a lower, shallower, and smaller passage formed in the protrusion 2 in terms of the wave height, the valley depth, and the width of the wavy portion, respectively. Must pass through, thus creating a large resistance and making it difficult to pull out. As a result, it is possible to prevent the substrate 1 from being pulled out from the protruding portion 2 of the base 1 as in the conventional case.

[0007]

【Example】

 In FIG. 1, reference numeral 1 is a synthetic resin base, and 2 is a downwardly projecting portion of the base 1. Reference numeral 3 is a mounting portion for the container. 5 is a cylindrical spout provided in the base 3, and an endless fissure 6 is formed in the base 1 inside the spout 5, whereby a tear portion 7 is formed inside the fissure 6. Has been formed. Reference numeral 8 is a pull ring-shaped tearing member provided on the tearing portion 7. A gas barrier sheet 9 is provided on the lower surface of the substrate 1 or inside the substrate 1.

The gas barrier sheet 9 is formed as shown in FIG. 6 as an example. In the figure, 9a is a gas barrier sheet, 9b is an aluminum foil, and 9c and 9d are synthetic resin layers, respectively. And it is provided on the cap as shown in FIGS. In the operation of this embodiment, first, the tear member 8 is pulled to form a through hole in the tear groove 6. In this case, the end portion of the umbrella-shaped portion 10 of the gas barrier sheet 9 is formed in a wavy shape, and the height, valley depth, width, etc. of the wavy wave are formed higher toward the end, deeper and longer. As a result, they are pulled in the direction of gradually lower, shallower, shorter corrugated passages, increasing resistance and obstructing passage. Therefore, it is possible to prevent the gas barrier sheet 9 from partially coming off the protrusion 2 when the tearing member 8 is pulled.

[0009]

[Effect of device]

 This invention is constructed as described above, and in the gas barrier sheet 9 to be provided inside the base 1, the outer peripheral portion of the gas barrier sheet 9 is bent obliquely downward to form the umbrella-shaped portion 10, and at that time, By forming a large number of diagonally downward convex-concave stripes 11 in the umbrella-shaped portion 10 in a substantially wavy shape, this is provided inside the cap, and the umbrella-shaped portion 10 is embedded in the downward-projecting portion 2 of the cap, When the tearing member 8 is pulled to cut the fissure 6 to form the spout, the corrugated portion at the end portion of the gas barrier sheet 9 is naturally compared to the inside of the umbrella-shaped portion 10. In addition, since the wave peaks of the wavy portion are high, the wave troughs are deep, and the widths of the wave crests and valleys are long, the gas barrier sheet 9 is used as the umbrella-shaped portion. A force is applied in the direction to pull out the uneven strip 11 of 10 If Tsu, end piece of the wave of the corrugated portion of its height of the umbrella-shaped portion 10 of the gas barrier sheet 9, valley depth, both width, less than, respectively. It has to be shallower, smaller, and has to enclose the passages formed in the projection 2, thus creating a large resistance and making it difficult to extract. As a result, it is possible to prevent the substrate 1 from being pulled out from the projecting portion 2 as in the conventional case.

[Brief description of drawings]

FIG. 1 is a half sectional view of a cap provided with a gas barrier sheet for a cap with a tear member according to the present invention.

FIG. 2 is an enlarged view of a main part of FIG.

FIG. 3 is a view taken along line III-III in FIG. 2;

FIG. 4 is a view corresponding to FIG. 2 showing another embodiment of the present invention.

FIG. 5 is a view corresponding to FIG. 3 showing still another embodiment of the present invention.

FIG. 6 is a sectional view of a portion of the gas barrier sheet of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base 2 Projection part 3 Attachment part 5 Filling port 6 Fissure groove 7 Breaking part 8 Breaking member 9 Gas barrier sheet 10 Umbrella part 11 Uneven part

Claims (1)

[Scope of utility model registration request] 1. A downward protrusion 2 on a base 1 made of synthetic resin.
To form a mounting portion 3 for a container, and to form the base 1
A tearing member in which a cylindrical spout 5 is provided, an endless fissure 6 is formed inside the spout 5 of the base 1, and a tearing member 8 is provided on a tearing portion 7 inside the fissure 6. A gas barrier sheet 9 having a gas barrier property higher than that of polyethylene, which is provided on the inside of the base 1 of the attached cap and has the end portion embedded in the protrusion 2, and the outer periphery of the gas barrier sheet 9. A cap with a tearing member, characterized in that the umbrella-shaped portion 10 is formed by bending the portion obliquely downward, and at the time, a large number of diagonally downwardly convex-concave ridges 11 are formed in the umbrella-shaped portion 10 in a substantially wavy shape. Gas barrier sheet.