JP2001240105A - 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 supersonic waves. SOLUTION: The mouth plug 10 consists of a spout 100 and a cap 200. In the spout 100, a pour cylinder 120 is erected on the inner 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 at its forward end is erected on one side of the top surface near the inside of the line 132, and a plurality of vibration transmission preventing recesses 135 each extending from the outer periphery of the incision 131 to the inner surface of the pour cylinder 120 are disposed on the outer circumferential annular edge of the closing plate 130 outside the annular incision 131 at regular intervals to partially make thinner the plate 130.

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 during distribution and storage with the easy opening during use, For example, FIG.
Alternatively, as shown in FIG. 6, a sealing plate (130) is provided on the lower inner surface of the inside of the spout (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 plurality of vibration transmission preventing recesses extending from the outer periphery of the annular cut to the inner surface of the pouring cylinder are arranged at equal intervals on the outer peripheral edge of the outer closing plate to be partially thinned. It is a plug of a liquid paper container to be filled.

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 at the lower end, a pouring cylinder having a threaded portion with a cap on the outer peripheral surface is erected, and a closing plate is provided on the inner surface below 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 plurality of columns extending from the outer periphery of the annular cut to the inner surface of the spout cylinder are provided on the lower surface of the outer peripheral edge of the closing plate outside the annular cut. It is noted that the vibration transmission preventing recesses of A spout for liquid packaging cartons to.

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 plurality of vibration transmissions of a predetermined width continuous from the outer periphery of the annular cut are formed on the lower surface of the outer peripheral annular edge of the closing plate outside the annular cut. Prevention concave parts are arranged at equal intervals to make it partially thin A spout for liquid cartons.

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 the tip is erected, and on the upper surface of the outer peripheral annular edge of the closing plate outside the annular cut, a plurality of pillars extending from the outer periphery of the annular cut to the inner surface of the discharge tube are provided. Vibration transmission prevention recesses are arranged at equal intervals to partially reduce the thickness. A spout for liquid packaging cartons for.

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 plurality of vibration transmission preventing recesses having a predetermined width continuous from the outer periphery of the annular notch, on the upper surface of an outer peripheral annular edge of a closing plate outside the annular notch. Are arranged at equal intervals to make it partially thin. A spout for liquid cartons.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
0), 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. An upright (133) is erected, and a closing plate (130) outside the annular cut (131) as shown in FIG. 2 or FIG.
Around the outer peripheral edge of the annular notch from the outer periphery of the annular cut.
A plurality of vibration transmission preventing recesses (135) reaching the inner surface of (0)
Are arranged at equal intervals to partially reduce the thickness. Note that the portion of the closing plate provided with the vibration transmission preventing concave portion is generally about half as thin as the other portions.
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. The structure of the cap (200) may be a general one, and a contact sealing ring (211) and an inner sealing ring (212) are vertically provided on the lower surface of the top plate (210), and the peripheral wall (220) is provided.
Is provided with a threaded portion (221) with the spout on the inner peripheral surface of the spout. Further, the spout can be attached to the container by attaching the spout discharge cylinder and the pedestal ring to the spigot mounting hole (21) of the container, and a sticking ring (111) provided around the lower end outer peripheral surface of the pedestal ring. And the inner surface of the container (20) are bonded by heat sealing by an ultrasonic sealing method. And
The spout and the cap are produced by injection molding using a thermoplastic resin such as polyethylene or polypropylene. In addition, the spout has an adhesive ring lower surface, a pedestal ring lower surface, and a sealing plate lower surface on the same horizontal plane, and has a polyethylene / meta-xylenediamine nylon / polyethylene configuration from the outside of the annular thin weak line on the lower surface of the spout.
A barrier film such as a polyethylene / silicon oxide vapor-deposited film / polyethylene structure and a polyethylene / aluminum foil / polyethylene structure may be bonded by an insert injection molding method.

The plug of the liquid paper container of the present invention is
As described above, a plurality of vibration transmission preventing recesses extending from the outer periphery of the annular cut to the inner surface of the dispensing cylinder are arranged at equal intervals on the outer peripheral annular edge of the closing plate outside the annular cut, and partially thinned. Therefore, when the plug is attached to the container by the ultrasonic sealing method, the vibration generated by the ultrasonic wave can be prevented from being greatly transmitted to the annular thin-walled weak line of the spout, and ultrasonic resonance by the annular thin-walled weak line The phenomenon can be prevented from occurring, and as a result, cracking of the annular thin weak line caused by the ultrasonic wave 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 is a cross-sectional view showing an essential part when a plug according to an embodiment of the present invention is protruded from a plug mounting hole of a liquid paper container, and FIG. 2 is a cross-sectional view taken along line AA ′ of the spout. It is. FIG. 3 is a cross-sectional view showing a main part when a plug according to another embodiment of the present invention is protruded from a plug mounting hole of a liquid paper container, and FIG. It is B 'sectional drawing.

The spout (1) of the spout (10) of the embodiment
As shown in FIG. 1, the structure of (00) is formed by screwing a cap (200) on the outer peripheral surface to the inner peripheral edge of the upper surface of the pedestal ring (110) around which the attaching ring (111) is provided. A pouring cylinder (120) having a joining portion (121) is erected, a closing plate (130) is provided on the lower inner surface of the pouring tube to seal the inside, and at a predetermined position on the lower surface of the closing plate, An annular notch (131) having an inverted V-shaped cross section is provided and an annular thin weak line (1) is formed on the upper surface.
32), and a column (1) having a pull ring (134) at the end on one side of the upper surface near the inside of the annular thin weak line.
33), and as shown in FIGS. 1 and 2,
On the lower surface of the outer peripheral edge of the closing plate (130) outside the annular notch (131), the injection cylinder (1) is inserted from the outer periphery of the annular notch.
Usually, six vibration transmission preventing recesses (135) reaching the inner surface of (20) are arranged at regular intervals, and the thickness (d) of the closing plate at that portion is changed to the thickness (D) of the other closing plate. More usually, the thickness is reduced to about half.

In another embodiment, the spout structure of the plug is provided with a screwing portion with a cap on the inner peripheral edge of the upper surface of a pedestal ring around which a sticking ring is provided on the outer peripheral surface of the lower end. 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 fragile line is formed on one side of the upper surface near the inside of the annular thin fragile line, a support having a pull ring at the tip is erected, and the outer peripheral edge of the outer peripheral edge of the closing plate outside the annular cut is formed. On the lower surface, usually a plurality of six vibration transmission preventing recesses having a predetermined width continuous from the outer periphery of the annular cut are arranged at equal intervals, and the thickness of the closing plate at that portion is usually larger than the thickness of the other closing plates. Then, the thickness is reduced to about half.

In another embodiment, as shown in FIG. 3, the structure of the spout of the plug is such that the inner peripheral edge of the upper surface of the pedestal ring (110) around which the attaching ring (111) is 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 as shown in FIGS. 3 and 4, on the upper surface of the outer peripheral annular edge of the closing plate (130) outside the annular notch (131), a discharge tube (120) is inserted from the outer periphery of the annular notch.
Usually, a plurality of vibration transmission preventing recesses (135) are provided at equal intervals to reach the inner surface of the slab, and the thickness (d) of the closing plate at that portion is usually larger than the thickness (D) of the other closing plates. Then, the thickness is reduced to about half.

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 support having a pull ring at its tip is erected on one side of the upper surface near the inside of the annular thin-walled weakened line, and the upper surface of the outer peripheral annular edge of the closing plate outside the annular cut Normally, six vibration transmission preventing recesses having a predetermined width continuous from the outer periphery of the annular cut are arranged at regular intervals, and the thickness of the closing plate at that portion is usually smaller than the thickness of the other closing plates. The thickness is reduced to about half.

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 an ultrasonic wave having a small frequency of 8 kHz, there was no crack in the annular thin brittle line 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.

In the test conducted by the inventors, the six vibration transmission preventing recesses were formed such that the circumferential width of the vibration transmission preventing recesses (the closing plate of this portion was thin) and the distance between the vibration transmission preventing recesses (this portion). The results are best when the circumferential gaps are arranged at the same interval in the circumferential direction (the thickness of the closing plate becomes thicker). Even if it was effective. Further, the circumferential interval between the vibration transmission preventing recesses is smaller than the circumferential width of the vibration transmission preventing recess.
There was an effect even when it was set to two-half. Further, the same effect can be obtained even if the vibration transmission preventing concave portion is provided in front of the column with the pull ring, or the vibration transmitting preventing concave portion is not provided in front of the column with the pull ring. In addition, the same effect is obtained regardless of whether the annular cut has a circular shape in the planar direction or is not circular.

[0019]

The stopper of the liquid paper container according to the present invention is provided with a plurality of vibration transmission preventing recesses extending from the outer periphery of the annular cut to the inner surface of the discharge tube on the outer peripheral annular edge of the closing plate outside the annular cut. Are arranged at equal intervals to make the wall partly thin, and when the plug is heat-sealed to the container by the ultrasonic sealing method, the ultrasonic vibration is hardly transmitted to the annular thin-walled weak line, and Does not crack.

For this reason, 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 showing a main part when a plug according to an embodiment of the present invention is protruded from a plug mounting hole of a liquid paper container.

FIG. 2 is a sectional view taken along line A-A 'of the spout of FIG.

FIG. 3 is a cross-sectional view showing a main part when a plug according to another embodiment of the present invention is protruded from a plug mounting hole of a liquid paper container.

FIG. 4 is a sectional view of the spout of FIG. 3 taken along line B-B '.

FIG. 5 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. 6 is a cross-sectional view illustrating a main part of another example of a conventional plug when protruding from a plug mounting hole of a liquid paper container.

FIG. 7 is a perspective view of an example of a liquid paper container in which a plug is protruded from a top inclined plate.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Plug 20 ... Container 21 ... Plug attachment hole 22 ... Incline plate 23 ... Body 100 ... Spout 110 ... Pedestal ring 111 ... Paste ring 120 ... Pour-out cylinder 121,221 ...... Threaded portion 130 ...... Closure plate 131 ...... Annular cut 132 ...... Annular thin weakened line 133 ...... Column 134 ...... Pull ring 135 ...... Vibration transmission prevention concave portion 200 ...... Cap 210 ...... Top plate 211 ...... Contact Sealing 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 HA03 HC03 HD03 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 plurality of vibration transmission preventing recesses extending from the outer periphery of the annular cut to the inner surface of the pouring cylinder are arranged at equal intervals on the outer peripheral edge of the outer closing plate, and are partially thinned. Stopper for liquid paper container. 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. A plurality of vibration transmission preventing recesses extending from the outer periphery of the annular notch to the inner surface of the pouring cylinder are arranged at equal intervals on the lower surface of the outer peripheral edge of the closing plate outside the annular notch. A spout for a liquid paper container, wherein the spout is partially thin. 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. A plurality of vibration transmission preventing recesses having a predetermined width continuous from the outer periphery of the annular notch are arranged at equal intervals on the lower surface of the outer peripheral annular edge of the closing plate outside the annular notch. A spout for a liquid paper container characterized by being partially thin. 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 a plurality of vibration transmission preventing recesses from the outer periphery of the annular cut to the inner surface of the pouring cylinder are arranged at equal intervals on the upper surface of the outer peripheral edge of the closing plate outside the annular cut. A plug for a liquid paper container characterized in that it is partially thinned. 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 a plurality of vibration transmission preventing recesses having a predetermined width continuous from the outer periphery of the annular cut are arranged at equal intervals on the upper surface of the outer peripheral annular edge of the closing plate outside the annular cut. A plug for a liquid paper container, characterized in that the plug is thin.