JP2001240104A - Mouth plug of paper container for liquid - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mouth plug of a paper container for liquid wherein cracks are not easily generated on an annular thin-walled fragile line of a spout by ultrasonic waves. SOLUTION: The mouth a plug 10 consists of a spout 100 and a cap 200. In the spout 100, a pour cylinder 120 is erected on the outer edge of the top surface of a base seat ring 110 and a closing plate 130 is sealed within the inner side of the pour cylinder 120. An annular incision 131 is provided on the plate 130 to form an annular thin-walled fragile line 132. A support 133 having a pull ring 134 at its forward end is erected on the upper side of the plate 130 near the inside of the line 132, and the thickness d of a closing plate 130B outward of the incision 131 is made smaller than the thickness D of a closing plate 130A inward of the incision 131.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spout for a liquid paper container, which comprises a spout projecting from the top of the container by heat sealing by an ultrasonic sealing method and a cap screwed to the spout. .

[0002]

2. Description of the Related Art Conventionally, liquid paper containers used for liquid contents of foods and non-foods are provided with, for example, as shown in FIG. A liquid paper container (20) having a square pillar shape and a spout and a cap (10) projecting from a sloped plate (22) at the top of a gable roof is widely used. This spigot is a spout with a cap screwed onto the spout spout protruding from the spigot mounting hole of the container.However, in order to combine the perfect sealing property during distribution and storage with the easy opening property during use, For example, FIG.
Alternatively, as shown in FIG. 4, a sealing plate (130) is provided on the lower inner surface inside the spout cylinder (120) of the spout (100) for sealing and opening at the time of use. An annular notch (131) having an inverted V-shaped cross section is provided at a predetermined position to form an annular thin weak line (132), or an annular notch (131) having a V-shaped cross section is provided at a predetermined position on the upper surface of the sealing plate. The annular thin-walled weak line (132) is formed, and a column (133) having a pull ring (134) at the tip is erected on one side of the upper surface near the inside of the annular thin-wall weakened line. When opening the spout for opening, remove the cap (200) and remove the spout cylinder (1).
The pull ring (134) housed inside 20) was hung on a fingertip and pulled to tear open the thin annular weak line (132) of the sealing plate (130). In addition, the spout that has been opened is for screwing a cap and resealing.

[0003]

However, the above-mentioned spout of the conventional liquid paper container is provided around the outer peripheral surface of the lower end of the pedestal ring by projecting the spout discharge tube into the spout mounting hole of the container. When the upper surface of the sticking ring and the inner surface of the container are heat-sealed by the ultrasonic sealing method, the vibration of the generated ultrasonic wave causes cracks in the annular thin-walled weak line of the sealing plate provided inside the pouring cylinder. In some cases, the sealability was impaired.
For this reason, although the energy is reduced by increasing the frequency of the ultrasonic wave and the heat fusion is performed slowly, the production efficiency is poor and there is a problem in terms of cost.

The present invention has been made to solve the above-mentioned conventional problems. When a plug is thermally fused to a container by an ultrasonic sealing method, the energy is increased by using ultrasonic waves of a small frequency to increase the production efficiency. The present invention provides a spout for a liquid paper container that does not cause cracks in the annular thin weak line of the sealing plate of the spout even when the spout is improved.

[0005]

That is, the first aspect of the present invention is as follows.
According to the invention, in a spout comprising a spout protruding from a spout mounting hole of a liquid paper container and a cap screwed into the spout, the spout has a sticking ring provided around the lower end outer peripheral surface. At the inner peripheral edge of the upper surface of the pedestal ring, a pouring cylinder having a threaded portion with the cap on the outer peripheral surface is erected, and a closing plate is provided on the lower inner surface of the pouring cylinder to seal the inner side. At a predetermined position of the plate, an annular cut is formed to form an annular thin weak line, a support having a pull ring at the tip is erected on one side of the upper surface near the inside of the annular thin weak line, and A stopper for a liquid paper container, wherein the thickness of an outer closing plate is formed smaller than the thickness of an inner closing plate from an annular cut.

Next, a second aspect of the present invention is a spout comprising a spout protruding from a spout mounting hole of a liquid paper container and a cap screwed and mounted on the spout, wherein the spout comprises: At the inner peripheral edge of the upper surface of the pedestal ring on which the adhesive ring is provided on the outer peripheral surface of the lower end, a pouring cylinder having a threaded portion with the cap on the outer peripheral surface is erected, and a closing plate is provided on the lower inner surface of the pouring cylinder. Is provided, and the inside is sealed. At a predetermined position on the lower surface of the closing plate, an annular notch having an inverted V-shaped cross section is provided to form an annular thin weak line on the upper surface, and an upper surface near the inner side of the annular thin weak line. On one side, a column having a pull ring at its tip is erected, and the lower surface outside from the outer periphery of the annular notch of the closing plate to the pouring cylinder is the lower surface inside the inner periphery of the annular notch of the closing plate. Formed at a higher position to adjust the thickness of the closing plate outside the annular cut. A spout for liquid packaging cartons, characterized in that formed thinner than the thickness of the inner closure plate from the cut.

A third aspect of the present invention is a spout comprising a spout protruding from a spout mounting hole of a liquid paper container and a cap screwed into the spout. At the inner peripheral edge of the upper surface of the pedestal ring on which the adhesive ring is provided on the outer peripheral surface of the lower end, a pouring cylinder having a threaded portion with the cap on the outer peripheral surface is erected, and a closing plate is provided on the lower inner surface of the pouring cylinder. Is provided, and the inside is sealed. At a predetermined position on the lower surface of the closing plate, an annular notch having an inverted V-shaped cross section is provided to form an annular thin weak line on the upper surface, and an upper surface near the inner side of the annular thin weak line. On one side, a column having a pull ring at its tip is erected, and a lower surface of an outer predetermined width continuous with the outer periphery of the annular notch of the closing plate is set to be lower than the inner surface of the inner periphery of the annular notch of the closing plate. The thickness of a closing plate formed at an upper position and having a predetermined width outside the annular notch. Which is the spout of a liquid packaging cartons, characterized in that the thinner thickness than the closure plate inside the annular notch.

Next, a fourth aspect of the present invention is a spout comprising a spout protruding from a spout mounting hole of a liquid paper container and a cap screwed onto the spout. At the inner peripheral edge of the upper surface of the pedestal ring on which the adhesive ring is provided on the outer peripheral surface of the lower end, a pouring cylinder having a threaded portion with the cap on the outer peripheral surface is erected, and a closing plate is provided on the lower inner surface of the pouring cylinder. Is provided, and the inside is sealed. At a predetermined position on the upper surface of the closing plate, an annular cut having a V-shaped cross section is provided to form an annular thin weak line on the lower surface. On one side, a column having a pull ring at its tip is erected, and the outer upper surface extending from the outer periphery of the annular notch of the closing plate to the pouring cylinder is higher than the upper surface inside the inner periphery of the annular notch of the closing plate. Formed in the lower position to reduce the thickness of the closure plate outside the annular cut A spout for liquid packaging cartons, characterized in that a more thinner than the thickness of the inner closure panel.

In a fifth aspect of the present invention, there is provided a spout comprising a spout protruding from a spout mounting hole of a liquid paper container and a cap screwed onto the spout, wherein the spout has a lower end. At the inner peripheral edge of the upper surface of the pedestal ring around which the sticking ring is provided on the outer peripheral surface, a pouring cylinder having a threaded portion with the cap on the outer peripheral surface is erected, and a closing plate is provided on the inner surface below this pouring cylinder. Is provided to seal the inside, and an annular cut having a V-shaped cross section is provided at a predetermined position on the upper surface of the closing plate to form an annular thin weak line on the lower surface. A pillar having a pull ring at the tip thereof is erected, and the upper surface of a predetermined width outside the outer periphery of the annular notch of the closing plate is positioned lower than the upper surface inside the inner periphery of the annular notch of the closing plate. And a thickness of a closing plate having a predetermined width outside the annular notch. Which is the spout of a liquid packaging cartons, characterized in that formed thinner than the thickness of the closure plate inside the annular notch.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
0) is a liquid paper container (2) as shown in FIG. 1 or FIG.
The spout (100) is a spout (100) comprising a spout (100) projecting internally from the spout mounting hole (21) of (0) and a cap (200) screwed into the spout.
Is a pouring cylinder (120) having a screwing portion (121) with a cap on the outer peripheral surface on the inner peripheral edge of the upper surface of the pedestal ring (110) on which the attaching ring (111) is provided on the outer peripheral surface at the lower end. )
And a sealing plate (130) is provided on the lower inner surface of the pouring cylinder to seal the inside thereof. At a predetermined position of the sealing plate, an annular cut (131) having an inverted V-shaped cross section or a V-shaped cross section is provided. ) To form an annular thin line of weakness (132) on the opposing surface side, and on one side of the upper surface near the inside of the annular thin line of weakness, a tip is provided with a pull ring (134) that is usually circular or elliptical at the tip. A column (133) is erected, and the thickness of the closing plate (130B) outside the outer periphery of the annular cut is formed smaller than the thickness of the closing plate (130A) inside the inner periphery of the annular cut. In addition, the thickness of the closing plate outside the outer periphery of the annular cut is usually about half the thickness of the closing plate inside the inner periphery of the annular cut. Further, the shape of the annular thin fragile line may be a circle, an ellipse, or an arbitrary shape according to the purpose of use of the container. And cap (20
The structure of 0) may be a general structure, in which a contact sealing ring (211) and an inner sealing ring (212) are provided vertically on the lower surface of the top plate (210), and a spout is provided on the inner peripheral surface of the peripheral wall (220). And a threaded portion (221). In addition, the plug is attached to the container by using the plug mounting hole (2) of the container.
In 1), make the spout pouring cylinder and pedestal ring protrude,
A sticking ring (11) provided on the outer peripheral surface of the lower end of the base ring
The upper surface of 1) and the inner surface of the container (20) are bonded by heat sealing by an ultrasonic sealing method. The spout and the cap are produced by injection molding using a thermoplastic resin such as polyethylene or polypropylene. In addition, the spout has the lower surface of the attachment ring, the lower surface of the pedestal ring and the lower surface of the sealing plate on the same horizontal plane. A structure in which barrier films such as a film / polyethylene structure and a polyethylene / aluminum foil / polyethylene structure are bonded by an insert injection molding method may be used.

The plug of the liquid paper container of the present invention is
As described above, since the thickness of the closing plate outside the outer periphery of the annular cut is formed to be smaller than the thickness of the closing plate inside the inner periphery of the annular cut, when attaching the plug to the container by the ultrasonic sealing method. The vibration generated by the ultrasonic wave can be prevented from being largely transmitted to the annular thin weak line of the spout, and the resonance phenomenon by the ultrasonic wave can be prevented at the annular thin weak line. As a result, the annular thin wall caused by the ultrasonic wave can be prevented. Cracks of weak lines can be prevented.

Next, an embodiment of a spout for a plug of a liquid paper container according to the present invention will be described in detail with reference to the drawings. FIG. 1 and FIG. 2 are cross-sectional views showing a main part of the plug according to the embodiment of the present invention when the plug is protruded from the plug mounting hole of the liquid paper container.

The spout (1) of the spout (10) of the embodiment
As shown in FIG. 1, the structure (00) has a threaded portion (see FIG. 1) inside the upper surface of a pedestal ring (110) around which a sticking ring (111) is provided. 1
21), a closing plate (130) is provided on the lower inner surface of the discharging tube to seal the inside thereof, and a reverse V cross section is provided at a predetermined position on the lower surface of the closing plate. An annular thin cut line (132) is provided on the upper surface with a U-shaped annular cut (131).
And a support (133) having a pull ring (134) at the tip on one side of the upper surface near the inside of the annular thin weak line.
And the outer lower surface extending from the outer periphery of the annular notch of the closing plate to the inner surface of the pouring cylinder is formed at a position higher than the lower surface inside the inner periphery of the annular notch of the closing plate. The thickness (d) of the outer closing plate (130B) is formed to be approximately half the thickness (D) of the closing plate (130A) inside the annular cut.

Further, in another embodiment, the spout structure of the spout comprises an inner peripheral edge of an upper surface of a pedestal ring around which a sticking ring is provided on an outer peripheral surface of a lower end, and a threaded portion with a cap on an outer peripheral surface. An outlet cylinder having an upright is provided, a closing plate is provided on the lower inner surface of the outlet tube to seal the inside, and an annular cut having an inverted V-shaped cross section is provided at a predetermined position on the lower surface of the closing plate. An annular thin-walled weak line is formed on one side of the upper surface near the inner side of the annular thin-walled weakened line, and a column having a pull ring at its tip is erected. The lower surface of the width is formed at a position higher than the lower surface inside the inner periphery of the annular notch of the closing plate, and the thickness of the closing plate having a predetermined width outside the annular notch is approximately half of the thickness of the closing plate inside the annular notch. It is formed as thin as about one.

In another embodiment, as shown in FIG. 2, the structure of the spout for a plug is such that the inner peripheral edge of the upper surface of a pedestal ring (110) having a sticking ring (111) provided on the outer peripheral surface of the lower end. A pouring cylinder (120) having a threaded portion (121) with the cap (200) on the outer peripheral surface is provided upright, and a closing plate (130) is provided on the lower inner surface of the pouring cylinder to seal the inside. An annular cut (131) having a V-shaped cross section is provided at a predetermined position on the upper surface of the closing plate to form an annular thin weak line (132) on the lower surface, and an upper surface near the inner side of the annular thin weak line is formed. A support (133) with a pull ring (134) at one end on one side
And, the outer upper surface from the outer periphery of the annular notch of the closing plate to the pouring cylinder is formed at a position lower than the upper surface inside the inner periphery of the annular notch of the closing plate, and the outer side of the annular notch is formed. The thickness (d) of the closing plate (130B) is formed to be approximately half the thickness (D) of the closing plate (130A) inside the annular cut.

In another embodiment, the structure of the spout for a plug is such that a threaded portion with a cap is formed on an outer peripheral surface of an inner peripheral edge of an upper surface of a pedestal ring on which a sticking ring is provided on an outer peripheral surface of a lower end. An erecting spout cylinder is provided, a closing plate is provided on the lower inner surface of the spouting tube to seal the inside, and an annular cut having a V-shaped cross section is provided at a predetermined position on the upper surface of the closing plate, and a lower surface is provided on the lower surface. An annular thin-walled weak line is formed, a column having a pull ring at its tip is erected on one side of the upper surface near the inner side of the annular thin-wall weakened line, and a predetermined width outside the annular cutout of the closing plate is connected to the outer periphery. Is formed at a position lower than the upper surface inside the inner periphery of the annular notch of the closing plate, so that the thickness of the closing plate having a predetermined width outside the annular notch is approximately half the thickness of the closing plate inside the annular notch. It is formed to be as thin as about one.

The four types of plugs of the above-described embodiments were loaded into a filling line, and were heat-sealed to the plug mounting holes of the container with an ultrasonic sealing machine.
Even with the use of ultrasonic waves having a small frequency of 8 kHz, cracks did not occur in the annular thin-walled brittle wire of the spout, the speed of the filling line could be increased, and the production efficiency was good. The weld time is 0.33
Seconds.

[0018]

According to the spout of the liquid paper container of the present invention, the sealing plate provided below the inside of the spout discharging cylinder is such that the thickness of the closing plate outside the annular thin-wall weakened line is smaller than that of the annular thin-wall weakened line. It is formed thinner than the closing plate, and when the plug is heat-sealed to the container by the ultrasonic sealing method, the vibration of the ultrasonic wave is not easily transmitted to the annular thin weak line, and the annular thin weak line does not crack.

Therefore, even if an ultrasonic wave having a high energy and a small frequency is used, there is very little risk of cracks in the annular thin brittle line, so that the speed of the filling line can be increased, and the production efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a main part of a plug according to an embodiment of the present invention when protruding from a plug mounting hole of a liquid paper container.

FIG. 2 is a cross-sectional view showing a main part of a plug according to another embodiment of the present invention when the plug is projected from a plug mounting hole of a liquid paper container.

FIG. 3 is a cross-sectional view showing a main part of a conventional example of a plug when protruding from a plug mounting hole of a liquid paper container.

FIG. 4 is a cross-sectional view showing a main part of another example of a conventional plug when protruding from a plug mounting hole of a liquid paper container.

FIG. 5 is a perspective view of an example of a liquid paper container in which a plug is projected from a top inclined plate.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Plug 20 ... Liquid paper container 21 ... Plug mounting hole 22 ... Slope plate 23 ... Body 100 ... Spout 110 ... Pedestal ring 111 ... Paste ring 120 ... Pour-out cylinder 121 , 221 Threaded portions 130, 130 A, 130 B… Closing plate 131… Annular cut 132… Annular thin-wall weakened line 133… Post 134… Pull ring 200… Cap 210… Top plate 211… Contact seal Stop ring 212: Inner sealing ring 220: Peripheral wall

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3E060 AA04 BC04 CE08 CE22 CF05 CF06 DA30 EA03 EA13 3E084 AA05 AA12 AA34 AB01 BA03 CA01 CB01 CB02 CB04 CC04 CC05 DA01 DB12 DC04 DC05 FA09 FB01 FD13 GA04 GB04 GB08 GB17 HD03 H02 KB02 LA03 LA17

Claims (5)

[Claims] 1. A spout comprising a spout protruding from a spout mounting hole of a liquid paper container and a cap screwed into the spout and attached to the spout. At the inner peripheral edge of the upper surface of the pedestal ring, a pouring cylinder having a threaded portion with the cap on the outer peripheral surface is erected, a closing plate is provided on the inner surface below the pouring cylinder to seal the inside, At a predetermined position of the closing plate, an annular cut is formed to form an annular thin weak line, a support having a pull ring at the tip is erected on one side of the upper surface near the inside of the annular thin weak line, and the annular cut is formed. A stopper for a liquid paper container, wherein a thickness of an outer closing plate is formed smaller than a thickness of an inner closing plate from an annular cut. 2. A spout comprising a spout protruding from a spout mounting hole of a liquid paper container and a cap screwed into the spout and attached to the spout. At the inner peripheral edge of the upper surface of the pedestal ring, a pouring cylinder having a threaded portion with the cap on the outer peripheral surface is erected, a closing plate is provided on the inner surface below the pouring cylinder to seal the inside, At a predetermined position on the lower surface of the closing plate, an annular cut having an inverted V-shaped cross section is provided to form an annular thin weak line on the upper surface, and a pull ring is provided at one end on the upper surface near the inside of the annular thin weak line. The support plate is erected, and an outer lower surface extending from the outer periphery of the annular notch of the closing plate to the pouring cylinder is formed at a position higher than a lower surface inside the inner periphery of the annular notch of the closing plate, and The thickness of the closing plate outside the cut is thinner than the thickness of the closing plate inside the annular cut. Formed liquid paper container spout, characterized in that the. 3. A spout comprising a spout projecting from a spout mounting hole of a liquid paper container and a cap screwed into the spout and attached to the spout. At the inner peripheral edge of the upper surface of the pedestal ring, a pouring cylinder having a threaded portion with the cap on the outer peripheral surface is erected, a closing plate is provided on the inner surface below the pouring cylinder to seal the inside, At a predetermined position on the lower surface of the closing plate, an annular cut having an inverted V-shaped cross section is provided to form an annular thin weak line on the upper surface, and a pull ring is provided at one end on the upper surface near the inside of the annular thin weak line. An erect column is provided, and a lower surface having an outer predetermined width that is continuous with the outer periphery of the annular notch of the closing plate is formed at a position higher than a lower surface inside the inner periphery of the annular notch of the closing plate, and the annular notch is formed. The thickness of the outermost closing plate with the specified width is determined by the thickness of the closing plate inside the annular cut. Ri thin and liquid paper container spout, characterized in that the. 4. A spout comprising a spout projecting from a spout mounting hole of a liquid paper container and a cap screwed into the spout and attached to the spout. At the inner peripheral edge of the upper surface of the pedestal ring, a pouring cylinder having a threaded portion with the cap on the outer peripheral surface is erected, a closing plate is provided on the inner surface below the pouring cylinder to seal the inside, An annular notch having a V-shaped cross section is formed at a predetermined position on the upper surface of the closing plate to form an annular thin weak line on the lower surface, and a pillar having a pull ring at one end on one side of the upper surface near the inside of the annular thin weak line. And the outer upper surface from the outer periphery of the annular notch of the closing plate to the pouring cylinder is formed at a position lower than the inner surface of the inner periphery of the annular notch of the closing plate. The thickness of the outer closing plate is made smaller than the thickness of the inner closing plate from the annular cut. Liquid Paper container spout, characterized in that the. 5. A spout comprising a spout protruding from a spout mounting hole of a liquid paper container and a cap screwed into the spout and attached thereto, wherein the spout has a sticking ring provided on an outer peripheral surface of a lower end. At the inner peripheral edge of the upper surface of the pedestal ring, a pouring cylinder having a threaded portion with the cap on the outer peripheral surface is erected, a closing plate is provided on the inner surface below the pouring cylinder to seal the inside, An annular notch having a V-shaped cross section is formed at a predetermined position on the upper surface of the closing plate to form an annular thin weak line on the lower surface, and a pillar having a pull ring at one end on one side of the upper surface near the inside of the annular thin weak line. And an upper surface of a predetermined width outside which is continuous with the outer periphery of the annular cut of the closing plate is formed at a position lower than the upper surface inside the inner periphery of the annular cut of the closing plate, and The thickness of the outer predetermined width of the closing plate is determined by the thickness of the closing plate inside the annular cut. Liquid Paper container spout, characterized in that the thin.