JP2003212251A - Pouring outlet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pouring outlet by which a concern of a burst of the contents is eliminated for the opening of the pull-ring pouring outlet of a liquid paper container in which the contents is heated and filled. <P>SOLUTION: There is provided an opening closing member which removably arranges a cut-out by an almost annular thin brittle part, and a gripping means formed on the part of the cut-out that is near the thin brittle part. A resistance changing part is formed on the thin brittle part so that the resistance changing part partially changes the resistance to a cut-out operation during the cut-out operation using the gripping means. <P>COPYRIGHT: (C)2003,JPO

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 container that heats and fills a liquid that forms an opening by breaking a thin fragile portion as a content, and more particularly to a spout installed on a paper container.

[0002]

2. Description of the Related Art Conventionally, what is generally used as a spout of a container for storing a liquid is a spout of a spout consisting of a combination of a spout main body and a cap. It consists of an opening closing member that includes a cutout in the tubular part, and a thin fragile part such as an annular or drop shape, a rhombus, etc. that is the planned opening part in the closing member, and the inside of the planned opening part near the thin fragile part A gripping means is provided, and a screw for screwing with the cap is provided on the outer wall of the cylindrical portion. A ring is connected to the tip of the picking means for easy picking. A screw is provided on the outer peripheral wall of the cylindrical portion, and a cap provided with a screw to be screwed with the screw on the inner wall is set to form a spout combination (hereinafter referred to as spout). The opening of the spout is a type of spout that breaks the thin fragile portion to form the opening, and as described above, is provided in the thin fragile portion when the thin fragile portion for opening is broken. Since a ring is often formed at the tip of the picking means, it is called a pull ring type spout. The opening of the pull-ring type spout is formed by removing the cap, pinching the knob (pull ring) in the cylinder of the spout main body, and pulling it upward to destroy the thin-walled fragile portion, and finally, the thin-walled fragile portion. The area encased by the section is removed and an opening is formed therein. The pull-ring type spout is used by being attached to a container such as a glass bottle, a plastic bottle or a paper container as a container for storing a liquid.

[0003]

Among them, a Gobel-top type paper container of the type which is filled with heat and hermetically sealed to enable circulation at room temperature, and is a paper container provided with the pull-ring type spout formed by plastic molding. Many containers are in circulation. A liquid paper container that has been heat-filled with the contents and immediately hermetically sealed is cooled as the contents elapse, and the gas in the headspace inside the container is depressurized, causing the side wall of the paper container to bend inward. The surface is pushed up and the liquid level in the container reaches near the attachment part of the spout. When pulling the pull ring upward and opening it all at once, the liquid may jump out of the opening or spill, but this is because the pull ring of the pull ring type spout is picked up and pulled up all at once. When the planned part is removed, when the rising liquid surface is finally torn off, the packaging body may shake greatly and the impact may cause the liquid content, which is the content of the package, to jump out of the opening. There were cases where the peripheral portion was contaminated. The present invention has been made in view of the above problems, and is to provide a spout that does not cause the contents to pop out at the opening of the pull-ring spout of a heated and filled liquid paper container. .

[0004]

The above-mentioned problems can be solved by the present invention described below. That is, claim 1
The invention described in (1) is an opening closing member in which the cutout portion is removably partitioned by the substantially annular thin fragile portion, and the gripping means is provided at a position close to the thin fragile portion of the cutout portion. Thus, the paper container spout is characterized in that a changing portion whose cutting resistance value is partially changed is formed during the cutting operation. By temporarily stopping the cutting operation in the middle of cutting, air flows into the depressurized container and the depressurization of the container is released.At that moment, the outer wall of the container that was curved inward due to the depressurization returns to the vertical state. Or, it bulges slightly outward. As a result, the liquid surface sinks and separates from the spout, which prevents liquid spillage during opening.

The invention described in claim 2 is characterized in that the modified portion according to claim 1 is formed by a constricted portion provided in the shape of a cutout portion. A concrete shape of the thin fragile portion in plan view is a cutout portion having a constricted portion. In the operation of cutting out the cut portion while destroying the thin fragile portion for forming the opening, the decompression of the container is released by the destruction of the thin fragile portion up to the constricted portion, and the air momentarily flows into the container, The curvature of the side wall of the container returns to the original state and the liquid surface sinks. Before opening the liquid level of the contents, even if the liquid level in the container is near the pouring outlet, the opening operation is started by picking the picking means and pulling it upward, and once the opening operation is performed at the constricted portion. Stop. At least, while the unsealing operation is stopped, the pressure inside the container returns to atmospheric pressure, so the depressurized state inside the container is released, and the inward bending of the side wall of the container returns and rather goes outward due to the weight of the contents. To bend. As a result, the liquid surface sinks, and even if there is a detachment impact that is seen when the cutout portion is finally cut off, it is possible to open the liquid without splashing.

According to a third aspect of the present invention, the modified portion according to the first aspect is formed by forming the thin fragile portion so that the thickness of the thin fragile portion is thicker in the annular portion than in other portions. It is a feature.

That is, in the wall thickness of the thin fragile portion provided in the annular shape, a portion which is capable of being cut and broken but is made thicker than the other portion is formed in the annular portion to increase the cutting resistance. It is a thing. That is,
In this thick portion, the cutting resistance value in the cutting operation is partially increased, and the cutting operation is suspended. As a result, as in the previous embodiment, air flows into the container during this stop state, the decompression of the container is released, the curvature of the container side wall returns to the original state or higher, and the liquid surface sinks. And, there is no fear of the liquid spilling out even by the impact of separation that is seen when the cutout is finally cut out.

According to a fourth aspect of the present invention, the modified portion according to the first aspect is characterized in that the changed portion is formed in the cutout portion by a slit portion formed of a thin portion at a right angle to the opening direction. Is. In this case, the opening is formed while destroying the thin fragile part, and in the slit part that is at a right angle to the opening part consisting of the thin part, the cutout part bends along the slit, and the instantaneous breaking resistance value becomes zero. It decreases to a similar degree and stops breaking when opened at normal speed. At the moment of this stop, as in the above method, air flows into the container and the pressure is released, so that the liquid surface sinks. And, there is no fear of the liquid spilling out even by the impact of separation that is seen when the cutout is finally cut out.

It is desirable that the slit is provided within 1/2 of the circular thin fragile portion as viewed from the opening start portion side. Further, the slit is preferably provided in an inverted V shape that bites from the inner surface side. However, when a barrier spout is formed by inserting and forming a barrier film or the like on the inner surface of the opening closing portion, the reverse V biting from the inner surface side is formed. When the slit is formed in a letter shape, wrinkles may occur in the barrier film or the like in the slit portion, and therefore it is preferable to use the slit from the outer surface side.

The resin forming the spout body of the spout of the present invention can be injection-molded, and the thin fragile portion to be formed is easily broken (cut) by pulling up the pinching means (ring). When the material of the container is a paper container, the resin is selected from resins that can be heat-sealed to the inner surface or the outer surface of the paper container. Specifically, it may be a resin such as low density polyethylene, linear low density polyethylene, medium density polyethylene, high density polyethylene, ionomer or polypropylene, or a blend resin of two or more of these resins. The resin forming the cap of the spout of the present invention includes a thread portion that can be screwed into the spout body, as long as it has injection moldability, and specifically, low density polyethylene, medium density polyethylene, A single resin such as high-density polyethylene, ionomer, polypropylene, polyamide, polyacrylonitrile, polycarbonate, polystyrene, etc., or two or more resins of these resins may be blended.

The spout of the present invention is expected to have the effect of preventing the liquid from splashing out at the opening, and exhibits a remarkable effect in the liquid paper container to be filled with heat.

The material constituting the liquid paper container for heating and filling the liquid contents is, for example, in the case of a Gobeltop type paper container, for example, a low-density polyethylene layer, liquid container paper, aluminum foil, stretched polyester film, Often formed from a stack of 5-8 layers such as a low density polyethylene layer. Such a laminate has a certain degree of rigidity as a container. However, for example, when sake is heat-filled at 65 to 70 ° C. and the sealed package is cooled to room temperature, the inside of the container is depressurized, and the atmospheric pressure causes the side panel of the container to bend toward the inside of the container. do it,
As described above, the liquid level as the content rises.
Also, in the case of plastic bottles, the liquid level may rise due to depressurization due to heating and filling.The liquid level rises depending on the type of molding resin, the wall thickness of the container, the shape of the bottle, etc. Due to the atmospheric pressure from the outside of the container due to the reduced pressure, the rise in liquid level tends to increase in a bottle having a flat panel. As described above, when the pull-ring type spout is installed as the spout in the heating-filling and sealing type packaging container, the spout of the present invention is used to safely remove the contents from the packaging container. be able to.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a spout according to the present invention will be specifically described below with reference to the drawings. The common conditions for both Examples and Comparative Examples are as follows. Container type: Goebel top type paper container Container body material: LDPE30 / Paper container dedicated paper 220 /
ALM9 / AD / PET12 / AD / LDPE60 [Abbreviation LDPE: Low-density polyethylene, ALM: Aluminum foil, AD: Adhesive, PET: Polyethylene terephthalate film, the number after each abbreviation is the layer thickness μ
m, but the unit of paper is g / m2 ■] Contents: Water content: 1800 ml Contents filling temperature: 70 ° C Liquid temperature at opening: 20 ° C Material of outlet: Low density polyethylene (density 0.92
2) Cap material: Polypropylene picking means are all pull-ring type. [Example 1] As shown in Fig. 1 (a), in a spout S including a spout body 1 and a cap 20, a thin fragile portion 5 has a shape as shown in Fig. 1 (c). A half-moon shape 9 having a diameter of 5 mm including a connecting portion of the picking means 6 and a main circle 10 having a diameter of 15 mm which is connected to the half-moon shape to overlap and form a dharma shape. The joint portion is the constricted portion 11. [Embodiment 2] As shown in FIGS. 1D, 1E and 1F, the thin fragile portion 5 has a circular shape with a diameter of 16 mm.
The thickness T ₀ of the opening closing portion is 1.1 mm, and the thin fragile portion 5
The thickness T of the thin fragile portion extends from the position of 8 mm from the center of the portion near the knob to 2 mm from the center
₁ was 300 μm, and the thickness T ₂ of the thin fragile portion in the other part was 250 μm. [Embodiment 3] As shown in FIGS. 2 (a) and 2 (b),
Circular thin-walled fragile portion 5 having a diameter of 16 mm and a thickness of 250 μm
A slit 12 was formed at a position perpendicular to the opening direction and 5 mm in the opening direction from the opening start portion. The slit 12 has a V-shaped cross section from the outer surface, and the thickness T ₃ at the thinnest portion is 500 μm.

[Comparative Example 1] As shown in FIG. 5, the thin fragile portion 5 has a circular shape with a diameter of 16 mm.
The wall thickness of the whole was 250 μm.

<Opening and Results> Opening was carried out by a panel of 10 people, and in each case, while the container was held by hand, pulling out of the pull ring 7 and observing liquid spillage and liquid spillage when the container was opened. In the first embodiment, the pull ring 7
When the thin fragile portion was broken by pulling, the thin fragile portion forming the half-moon portion was destroyed first, and the break was temporarily interrupted at the constricted portion 11 of the connecting portion between the half-moon portion and the large circle. At this time, the half-moon portion 9 of the thin fragile portion 5 is in an open state of a small crevice, air flows into the container, the depressurized state of the container is released all at once, and the liquid level before opening is below the planned opening portion. Although it was 3 mm, immediately after the formation of the rift, it sinked to a depth of 10 mm below the planned opening portion, and even after the impact of breaking the thin-walled fragile portion at the end of the opening, the liquid spilled out and the liquid I could open it safely without spilling. In the second embodiment, in the resistance portion provided in the thin fragile portion, the destruction of the thin fragile portion is stopped, and the air flows into the inside of the container from the ruptured rupture up to the resistance portion. The liquid level of the contents in the container sank, and all 10 people could safely open the container. Further, in Example 3, breakage of the thin fragile portion was stopped at the slit portion, and a half-moon shaped opening portion was formed. Air flowed into the container through the opening, and as in Examples 1 and 2, the liquid level of the contents in the container sank, and all 10 persons could safely open the container. In Comparative Example 1, hold the container in your hand,
When pulling up the pull ring 7 and opening it all at once,
In 0 out of 3 people, the liquid jumped out and polluted the surrounding area.
In order to completely prevent the liquid from jumping out, it was necessary to place the container on a flat surface and gently pull up the pull ring 7.

The effect of preventing the liquid from splashing out in each of the structures of the spouts in Examples 1 to 3 is
The liquid level in the sealed container at the time of opening is related to the liquid level at the time of cutting off the cut portion. FIG. 3 shows the unsealing time (t) and the unsealing resistance value f for measuring the unsealing resistance value according to the structure of the spout body.
It is a graph which shows. Measuring device: Tensilon (manufactured by A & D Co., Ltd.
Tensile tester) This is the resistance value (unit: N) when the flange portion of the spout main body is fixed, the pinching means is clamped, and the pulling means is pulled at a speed of 100 mm / min. The average resistance value f for each shape of the modified portion was as follows. Example 1: FIG. 3 (a) = narrowed portion formation f _s = 10 f ₁ = 7 f ₂ = 30 f ₃ = 10 _fe = 25 Example 2: FIG. 3 (b) = thickness of thin fragile portion Partial modification f _s = 30 f ₁ = 13 f ₂ = 18 f ₃ = 10 f _e = 25 Example 3: FIG. 3C = slit formation f _s = 30 f ₁ = 10 f ₂ = 5 f ₃ = 10 f _e = 25 Comparative example 1: FIG. 3 (d) = conventional method f _s = 30 f ₁ = 10 f _e = 25

As shown in FIG. 4 (a), in a Gobel-top type paper container, a cross-sectional view taken along line X ₃ -X ₃ when a container body made of a material having perfect rigidity is filled with water at room temperature is
In FIG. 4B, the side panel 32 ₀ is vertical.
In each of the examples and the comparative examples, the state of heating and filling and sealing is as shown in FIG. 4C, the wall surface 32 of the container is curved inward by the pressure reduction in the container and pushes up the liquid surface, The liquid level L ₁ has risen to the installation position of the spout. In the opening operation, in the case of the spout S of Comparative Example 1, since the cutout portion is cut off at once, the content (water) in the vicinity of the opening portion pops out due to the impact when the cutoff portion is lastly shredded. However, in any of the first, second and third embodiments, in the opening operation, the thin fragile portion is partially torn or partially opened, and the opening operation is temporarily stopped. Therefore, the reduced pressure is released, and the curvature of the wall surface toward the inside of the container is restored, and due to the weight of the liquid, it is curved toward the outside. As a result, the liquid level is shown in Fig. 4.
As shown in (d), sink to the position of L ₂ . In any of the examples, the liquid to be sunk is cut off and the portion to be unsealed is torn off after the liquid surface L ₂ is sunk.

[0018]

EFFECTS OF THE INVENTION By using a pull ring type spout provided with a changing portion whose cutting resistance value partially changes during the cutting operation by the picking means, when the ring-shaped planned cutting portion is cut out at the time of unsealing. The cutting operation can be temporarily stopped at the changing portion, and as a result, the liquid surface of the contents sinks, so that the liquid can be safely opened without spilling or spilling of the liquid.

[Brief description of drawings]

FIG. 1 is a diagram illustrating an embodiment of a spout for a paper container of the present invention, (a) a perspective view of a spout body and a cap of the spout, (b) a sectional view of the spout body, and (c). Sectional view of X ₀ -X ₀ showing the form of Example 1, (d) Sectional view of X ₀ -X ₀ showing the form of Example 2, (e) Sectional view of X ₁ -X ₁ , (f) X ₂
It is a cross-sectional view of -X _2.

2A is a cross-sectional view of a spout main body, FIG. 2B is a cross-sectional view taken along the line X ₀ -X ₀ , and FIG. 2F is a cross-sectional view taken along the line X ₃ -X ₃ .

FIG. 3 is a diagram for explaining changes in breaking strength when the spout of the present invention is opened. (A) shows a case where the cut resistance value changing part is a constriction part, and (b) shows a changing part. In the case of partially increasing the thickness of the thin fragile portion, (c) shows a slit provided at right angles to the opening direction, and (d) shows a conventional spout.

FIG. 4 is a diagram for explaining the effect of the embodiment of the spout of the present invention, (a) a perspective view of a liquid paper container equipped with the spout of the present invention, (b) no decompression inside the container, Cross section of X ₃ -X ₃ when is completely rigid, (c) heat filling,
Sectional view of the X ₃ -X ₃ in the case of sealing a cross-sectional view of the X ₃ -X ₃ in the case of releasing (d) is sealed.

FIG. 5 is a diagram illustrating a shape of a thin fragile portion in a closed portion of a spout body of a comparative example.

[Explanation of symbols]

P package S outlet F contents k opening 1 spout body 2 tube 3 opening closure 4 Flange part 5 Thin wall fragile part 6 picking section 7 Ring part 8 screw part 9 half moon 10 main circle 11 constriction section 12 slits 20 cap 31 inclined panel 32 side panel 33 Top seal part

Continued front page    F-term (reference) 3E084 AA05 AA12 AA34 AA37 AB01                       AB02 BA03 CA01 CB01 CB02                       CC03 CC04 CC05 DA01 DB12                       DC03 DC04 DC05 EB01 EB02                       EC03 EC04 EC05 FA09 FB01                       GA01 GB01 KB01 LA03 LA07                       LA17 LB02 LB07

Claims (4)

[Claims] 1. An opening closing member in which a cutout portion is removably partitioned by a substantially annular thin fragile portion, and a gripping means is provided at a position close to the thin fragile portion of the cutout portion. A spout characterized by forming a changing portion in which a cutting resistance value partially changes during a cutting operation. 2. The spout according to claim 1, wherein the changing portion is formed by a constricted portion provided in a cutout shape. 3. The spout according to claim 1, wherein the changed portion is formed by forming a thin fragile portion such that a wall portion of the annular portion is thicker than other portions. 4. The spout according to claim 1, wherein the changed portion is formed in the cutout portion by a slit portion formed of a thin wall portion at a right angle to the opening direction.