JP2002308312A - Mouth plug having pull-ring - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mouth plug having a pull-ring which does not generate cracks in an annular thinner weakened line of a sealing plate of a spout when the mouth plug is heat-welded to a container by an ultrasonic sealing method, for which the restriction for a horn to be used is less, and also, the spout of which is easy to open by the pull-ring. SOLUTION: This mouth plug having the pull-ring comprises the spout 100 and a cap 200 which is fitted on the spout. Then, on the lower end outer periphery of the pedestal ring 110 of the spout, a flange 140 for heat-welding having a flat upper surface is provided. Then, the annular thinner weakened line 132 is formed on the upper surface of a sealing plate 130 by providing an annular cut 131 from the lower surface of the sealing plate 130. The location of the annular thinner weakened line is set at a higher location by 2 mm or more from the lower surface of the pedestal ring. Then, the internal diameter of a lower section than the approximate center in the vertical direction of the pedestal ring is made larger than the internal diameter of the upper section and is formed to be thinner. Also, the thickness h2 of the sealing plate on the outside of the annular thinner weakened line is formed to be thinner than the thickness h1 of the sealing plate on the inside of the annular thinner weakened line.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid paper container comprising a spout internally provided by an ultrasonic sealing method and a cap attached to the spout, and a pull ring for opening the spout with a pull ring. It is about the mouth plug.

[0002]

2. Description of the Related Art Conventionally, liquid paper containers used for liquid contents of foods and non-foods are provided with a trunk (21) as shown in FIG. Is a square tube, and a spout (100) and a cap (200) are provided on a sloped plate (22) at the top of a gable roof.
The liquid paper container (20) protruding from (0) has been used over a wide range of applications. This spout has a cap screwed onto a spout spout that protrudes from the spout mounting hole of the container, but ensures perfect sealing and virginity during distribution, or is easily opened during use. In order to combine the properties, for example, as shown in FIGS. 2A and 2B, a sealing plate (130) is provided on the lower inner surface inside the spout cylinder (120) of the spout (100), and sealing is performed. In order to open at the time of use, an annular cut (131) having an inverted V-shaped vertical cross section is provided at a predetermined position on the lower surface of the sealing plate, and an annular thin-walled weak line (132) is formed at the expected opening position on the upper surface. A pillar (133) having a pull ring (134) at its tip is erected on a predetermined side of the upper surface near the inner side of the thin weak line, and when opening a plug for opening a container, a cap ( 200) and remove the spout (100) Is accommodated inside the output tube (120) pull ring (1
34), put a fingertip on it and pull it upward to close the sealing plate (13).
The annular thin weak line (132) of 0) was torn open. After the spout was opened, the cap was screwed into the spout cylinder and attached and resealed after use.

[0003]

However, the above-mentioned conventional plug with a pull ring (10) is not shown in FIG.
As shown in (b), the plug mounting hole (2) of the container (20)
An upper surface of a base (110) having a heat sealing ring (141) of a flange (140) provided around a lower end outer peripheral surface of a pedestal ring (110) by projecting a spout cylinder (120) of a spout (100) into a container (1); When the inner surface of the sealing plate is thermally fused by an ultrasonic sealing method, a crack is generated in the annular thin-wall weakened line (132) of the sealing plate (130) provided inside the pouring cylinder due to the vibration energy of the generated ultrasonic wave. In some cases, the sealability was impaired. In addition, the diameter of the horn provided on the upper surface of the flange and used by the heat sealing ring was regulated.

The present invention solves the above-mentioned problem of the conventional plug with a pull ring. When the plug is heat-sealed to a container by an ultrasonic sealing method, an annular thin brittle line of a sealing plate of a spout is used. The present invention provides a plug with a pull ring, which does not generate cracks, restricts a horn to be used, and easily opens a spout with a pull ring.

[0005]

That is, the first aspect of the present invention is as follows.
The invention comprises a spout and a cap to be attached to the spout. The spout is provided with a spouting tube erected on the inner peripheral edge of the upper surface of the pedestal ring, and a sealing plate is provided below the spouting tube to provide a sealing plate. An annular thin-walled weak line is formed at the expected opening position of the sealing plate, and a column for connecting a pull ring to the tip is erected on one side of the upper surface near the inside of the annular thin-walled weakened line, and the ultrasonic sealing method is used. In the spout with a pull ring attached to the container, a heat sealing flange having a flat upper surface is provided on the outer periphery of the lower end of the pedestal ring of the spout, and the annular thin weak line is provided with an annular cut from the lower surface of the sealing plate. Formed on the upper surface, the position of the annular thin line of weakness is provided at a position 2 mm or more above the lower surface of the pedestal ring, and the inner diameter below the middle of the pedestal ring in the vertical direction is larger than the upper inner diameter. I A plug with a pull ring, characterized in that it is formed to be thin and the outer thickness of the sealing plate outside the annular thin weak line is smaller than the thickness of the sealing plate inside the annular thin weak line. It is.

Next, a second invention of the present invention is characterized in that a reinforcing rib is provided at the center rear of the inside of the column.
A plug with a pull ring according to the invention.

Next, a third invention of the present invention is directed to the opening with a pull ring according to the first or second invention, wherein the thickness of the annular thin fragile wire is set to 0.24 to 0.30 mm. It is a stopper.

According to a fourth aspect of the present invention, the thickness of the sealing plate outside the thin annular weak line is reduced to 30 to 70% of the thickness of the sealing plate inside the annular thin weak line. The plug with a pull ring according to any one of the first to third aspects of the present invention.

[0009]

Next, an embodiment of a cap with a pull ring according to the present invention will be described in detail with reference to the drawings. FIG. 1A is a sectional view showing a structure of a plug with a pull ring according to one embodiment of the present invention, and FIG. 1B is an enlarged sectional view of the spout. FIG. 3 is a perspective view of an example of a liquid paper container in which a plug with a pull ring is protruded from a top inclined plate.

As shown in FIG. 3, a cap (10) with a pull ring according to an embodiment of the present invention includes a liquid paper container (2).
0) A spout projecting from the top inclined plate by the ultrasonic sealing method and a cap (20) screwed to and attached to the spout.
1), and as shown in FIG. 1 (a), the spout is provided on the inner peripheral edge of the upper surface of the pedestal ring (110), and the spout cylinder (120) having a threaded portion (121) with the cap on the outer peripheral surface. )
And a sealing plate (130) is provided to seal the lower inside of the pouring cylinder, and an annular thin weak line (132) is formed at a position where the sealing plate is to be opened. A column (133) for connecting a pull ring (134) to the tip is provided upright on one side of the upper surface near the inner side, and the cap (200) is screwed with the spout on the inner peripheral surface of the peripheral wall (220). A contact sealing ring (211) having a portion (221) and sealing the spout on the lower surface of the top plate (210) (the tip is in close contact with the spout opening top surface) and an inner sealing ring (2)
12) (the outer peripheral surface is closely attached to the inner peripheral surface of the spout opening). The spout is usually made of a thermoplastic resin such as polyethylene, and the cap is usually made of a thermoplastic resin such as polypropylene by an injection molding method.

Then, as shown in FIG. 1 (a) or (b), a flange (140) having a flat upper surface is provided on the outer periphery of the lower end of the pedestal ring (110) of the spout (100),
An annular thin weak line (132) is formed on the upper surface from the lower surface of the sealing plate (130), usually by providing an inverted V-shaped annular cut (131), and the position of the annular thin weak line is determined by the position of the base ring. It is provided at a position 2 mm or more above the lower surface, and the inner diameter of the pedestal ring, which is lower than approximately the middle in the vertical direction, is made larger and thinner than the upper inner diameter, and the thickness outside the annular thin brittle line of the sealing plate ( h2) is formed to be thinner than the thickness (h1) of the sealing plate inside the annular thin weak line.
In addition, reinforcing ribs (13)
5), and the thickness of the annular thin brittle line is set to 0.24 to 0.3.
The thickness (h2) of the sealing plate outside the annular thin-wall weakened line is usually 30 to 70% of the thickness (h1) of the sealing plate inside the annular thin-wall weakened line. According to the findings of the inventors' trial production, when the thickness of the annular thin-walled brittle line is 0.24 mm or less, cracks may be generated by ultrasonic waves, and when the thickness is 0.30 mm or more, when the pull ring is pulled, the annular thin-walled weak line may be formed. Fragile lines are less likely to tear. Further, the thickness of the sealing plate outside the annular thin weak line is 30% of the thickness of the sealing plate inside the annular thin weak line.
If it is less than the above, the strength is weak, and if it is 70% or more of the thickness of the sealing plate inside the annular thin weak line, cracks may be generated in the annular thin weak line by ultrasonic waves. In addition, the upper surface position of the sealing plate is usually provided at a position 0.5 mm above the upper surface position of the pedestal ring, and FIG.
As shown in (1), a temporary fixing projection (111) necessary for attaching to the container is provided on the outer peripheral surface of the pedestal ring (110) at the outer surface of the container (20).

As shown in FIG. 1B, the spout of the plug with a pull ring according to the present invention is inserted into a spout mounting hole (21) of a container (20) and a spout cylinder (120) and a pedestal ring (110). When the upper surface of the flange (140) is heat-sealed by ultrasonic sealing to the inner surface of the outer periphery of the spout mounting hole of the container, compared with the conventional spout of the plug with a pull ring, the sealing plate ( 130) annular thin fragile line (13
2) is located at a position 2 mm or more above the lower surface of the pedestal ring, so it is located farther from the ultrasonic vibration source, and the inner diameter below the pedestal ring is made larger than the upper inner diameter to make it thinner. Therefore, the vibration energy of the ultrasonic wave is absorbed and attenuated, and the thickness (h2) of the sealing plate outside the thin annular weak line is usually increased by the thickness (h1) of the sealing plate inside the annular thin weak line. By making the thickness thinner, the vibration energy of the ultrasonic wave is absorbed and attenuated, so that cracks do not occur in the annular thin brittle line. Further, since there is no heat sealing ring on the upper surface of the flange and it is flat, there is little restriction on the ultrasonic sealing horn to be used.

[0013] Further, the annular thin weak line of the spout of the plug with a pull ring of the present invention is formed on the upper surface by providing an annular cut from the lower surface of the sealing plate. Even when the pull ring is pulled with the same strength, it is easier to tear than when the pull ring is pulled, and because the reinforcing rib is provided at the center rear inside the column, the fulcrum when pull ring is pulled backward Yes, the thin annular weak line is easily torn by the principle of leverage. As a result, the thickness of the annular thin weak line can be increased, and cracks due to ultrasonic waves are less likely to occur.

[0014]

In the spout with the pull ring of the present invention, when the spout is heat-sealed to the container by the ultrasonic sealing method, there is little restriction on the ultrasonic sealing horn to be used, and the annular shape of the spout sealing plate is small. Cracks do not occur in the thin-walled fragile line, the production efficiency is extremely good, and when opening the container, pull the pull ring housed inside the spout ejection tube with your finger and pull it upward. Thus, the spout can be easily opened by tearing the annular thin fragile line of the sealing plate.

[Brief description of the drawings]

FIG. 1A is a sectional view showing a structure of a plug with a pull ring according to an embodiment of the present invention, and FIG. 1B is an enlarged sectional view of the spout.

FIG. 2A is a cross-sectional view showing a structure of a conventional plug with a pull ring, and FIG. 2B is an enlarged cross-sectional view of the spout.

FIG. 3 is a perspective view of an example of a liquid paper container.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Plug 20 ... Container 21 ... Plug mounting hole 22 ... Slope plate 23 ... Body 100 ... Spout 110 ... Pedestal ring 111 ... Temporary fixing protrusion 120 ... Pour-out cylinder 121,221 ... Threaded portion 130... Closure plate 131... Annular cut 132... Annular thin-wall weakened line 133. 210: Top plate 211: Contact sealing ring 212: Inner sealing ring 220: Peripheral wall h1, h2: Thickness

 ────────────────────────────────────────────────── ─── Continued on the front page F term (reference) 3E084 AA05 AA12 AB01 BA01 CA01 CC05 DA01 EA03 EB01 EB04 EC04 FA09 FB01 GA04 GB04 KA13 KB01 LA03 LB02 LB07 LD01

Claims (4)

[Claims] The spout comprises a spout and a cap to be attached to the spout. The spout is provided with a spouting tube erected on an inner peripheral edge of an upper surface of a pedestal ring, and a sealing plate is provided below the spouting tube. Sealing, forming an annular thin-walled weak line at the expected opening position of the sealing plate, standing upright on one side of the upper surface near the inside of the annular thin-wall weakened line, connecting a pull ring to the tip, and ultrasonic sealing In a spout with a pull ring attached to a container by a method, a flange having a flat upper surface is provided on the outer periphery of a lower end of the pedestal ring of the spout, and the annular thin weak line is
An annular cut is formed on the upper surface of the sealing plate from the lower surface, and the position of the annular thin line is provided at a position 2 mm or more above the lower surface of the pedestal ring. The lower inner diameter is made larger than the upper inner diameter so as to be thinner, and the thickness of the sealing plate outside the annular thin weak line is smaller than the thickness of the sealing plate inside the annular thin weak line. A plug with a pull ring characterized by being formed thinly. 2. The plug with a pull ring according to claim 1, wherein a reinforcing rib is provided at the center rear of the inside of the support. 3. The thickness of said annular thin fragile wire is 0.24 to 0.24.
The plug with a pull ring according to claim 1 or 2, wherein the diameter is 0.30 mm. 4. The sealing plate according to claim 1, wherein the thickness outside the thin annular weak line is 30 to 70% of the thickness of the sealing plate inside the thin annular weak line. 4. The plug with a pull ring according to any one of claims 1 to 3.