JP2003020053A - Plug for liquid container made of paper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plug for a liquid container made of paper which can completely seal the container when a spout is re-sealed with a cap even in a liquid container made of paper with a large capacity so that there is no fear of liquid dripping from the plug. SOLUTION: The plug comprises a spout 200 and a cap 100 to be screwed with the spout. The spout comprises a pour-out cylinder 220 standing on an inner periphery of an upper surface of a base ring 210. The cap has an inner seal ring 112 hanging from a lower surface of a top plate 110. A contact seal ring 111 having a vertical cross section of an approximately inverted right- angled triangle with a vertical surface outside and with an acute vertex angle is made to hang in tight contact with the outside of the inner seal ring. When the cap is screwed with and mounted on the cap, a tip of the contact seal ring of the cap comes into tight contact with an upper surface of the pour-out cylinder of the spout.

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 spigot in which a cap is screwed onto a spout projecting at a pouring position of a liquid paper container for filling contents at a high temperature. The present invention relates to a liquid paper container spout that has no risk of liquid leakage when the cap is opened and then resealed with a cap.

[0002]

2. Description of the Related Art Conventionally, liquid paper containers used for liquid contents of foods and non-foods have been designed in consideration of ease of use.
For example, as shown in FIG. 3, the body part (21) has a square tubular shape, and a gable roof-shaped top sloping plate (22) is provided with a cap (100) and a spout (200).
The liquid paper container (20) provided with the projection 0) was used over a wide range of applications. This spigot is a spout spout that protrudes from the spout mounting hole of the container, and a cap is screwed on the spout.However, normally, the complete sealing and virginity during distribution are ensured or In order to combine the easy opening property of the spout (20), as shown in FIG.
No. 0) inside of the spout cylinder (220) on the lower inner surface of the sealing plate (2
30) is provided for sealing and opening at the time of use. Therefore, an annular cut (231) 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 fragile wire is provided on the upper surface at a predetermined opening position. (232) is formed, and a pull ring (234) is attached to the tip on a predetermined side of the upper surface near the inner side of the annular thin line of weakness.
A stanchion (233) having a ridge is provided upright, and when the spout is opened to open the container, the cap (10
0) and remove the spout (200) spout (22)
The pull ring (234) housed inside 0) was hooked with a fingertip and pulled upward to tear and open the annular thin fragile line (232) of the sealing plate (230). In addition, after the spout opened, the cap was screwed onto the spout tube and attached to the spout to reseal it.

[0003]

By the way, in the conventional liquid paper container mouthpiece, when the mouthpiece is opened and then resealed with a cap, the sealing method is as follows: When the ring is hung vertically and the cap is attached to the spout, the tip of the contact sealing ring is brought into contact with the top surface of the spout mouth to seal it, or the inner sealing ring is attached to the bottom surface of the top plate of the cap. When the cap is attached vertically to the spout, the outer peripheral surface of the inner sealing ring is brought into contact with the inner peripheral surface of the spout mouth portion to seal, or, as shown in FIG. 5, a top plate (110 ), The contact sealing ring (111) and the inner sealing ring (112) are hung vertically inside the contact sealing ring (111), and when the cap (100) is attached to the spout (200), the tip of the contact sealing ring and the inner ring. It was to seal the mouth of the spout in the outer peripheral surface of the sealing ring. However, the shape of the tip of the conventional contact sealing ring (111) is generally a semicircular vertical cross-sectional shape as shown in FIG. For example, 1.8
(2 liters, 3 liters, etc.), the internal pressure of the container may increase during use, and it may be difficult to completely prevent liquid leakage from the mouth plug of the container when resealing.

The present invention solves the above-described problem of the conventional liquid paper container spout, and even in a large-capacity liquid paper container, when the spout is resealed with the cap, the container is completely sealed. (EN) A mouthpiece for a liquid paper container that can be hermetically sealed and has no risk of liquid leakage from the mouthpiece.

[0005]

The first invention of the present invention is as follows:
It consists of a spout and a cap screwed onto this spout.The spout has a spout tube standing on the inner peripheral edge of the upper surface of the pedestal ring, and the cap has an inner sealing ring hung vertically on the lower surface of the top plate. , The inner sealing ring is closely contacted, and a contact sealing ring having a vertical cross-section of an almost inverted right triangle with a vertical surface on the outside and a sharp tip angle is vertically installed, and the cap is screwed onto the spout. The cap of the liquid paper container is characterized in that the tip of the contact sealing ring of the cap comes into close contact with the upper surface of the spout barrel of the spout when mounted.

Next, a second invention of the present invention comprises a spout and a cap screwed onto the spout, wherein the spout has a spout tube standing on the inner peripheral edge of the upper surface of the pedestal ring.
The cap has an inner sealing ring vertically provided on the lower surface of the top plate, and is provided around the outer side of the inner sealing ring with a space therebetween. The vertical cross section is substantially an inverted right triangle, and the vertical surface is the outer side with a tip angle. Hung a sharp contact sealing ring,
A stopper for a liquid paper container, wherein a tip of a contact sealing ring of the cap comes into close contact with an upper surface of a spout barrel of the spout when the cap is screwed and attached to the spout.

Next, a third invention of the present invention comprises a spout and a cap screwed to the spout, wherein the spout has a spout tube standing on the inner peripheral edge of the upper surface of the pedestal ring.
The cap has an inner sealing ring vertically provided on the lower surface of the top plate, and is provided around the outer side of the inner sealing ring with a space therebetween. Hung a sharp contact sealing ring,
A stopper for a liquid paper container, wherein a tip of a contact sealing ring of the cap comes into close contact with an upper surface of a spout barrel of the spout when the cap is screwed and attached to the spout.

A fourth invention of the present invention is characterized in that the height of the contact sealing ring vertically provided on the lower surface of the top plate of the cap is 0.2 mm or more. The liquid paper container spout according to the invention.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of the liquid paper container spout of the present invention will be described in detail with reference to the drawings. FIG. 1 is a cross-sectional view of a liquid paper container spout according to an embodiment of the present invention, and FIGS. 2A to 2C are each a contact of the liquid paper container spout according to an embodiment of the present invention. It is explanatory drawing which shows the shape of a sealing ring and the state which seals the opening part of a spout, and FIG. 3 is a perspective view of the liquid paper container with a stopper as an example.

A liquid paper container spout (1) according to an embodiment of the present invention
For example, as shown in FIG. 3, the body 0 (21) is protruded by heat-sealing the top inclined plate (22) of the liquid paper container (20) having a rectangular tubular shape by ultrasonic sealing or the like. Let spout (2
00) and a cap (100) to be screwed onto the spout and attached thereto. As shown in FIG. 1, the cap (100) has a portion (121) to be screwed with the spout on the inner peripheral surface of the peripheral wall (120). ), And a contact sealing ring (111) (the tip is in close contact with the top surface of the spout mouth) for sealing the spout on the lower surface of the top plate (110) and an inner sealing ring (112) (the outer peripheral surface is Close contact with the inner surface of the spout mouth)
As shown in FIG. 1, the spout (200) has a flange (2) which is heat-sealed to the container at the outer periphery of the lower end.
40) and a pedestal ring (220) having a screwing part (221) with a cap on the outer peripheral surface is formed on the inner peripheral edge of the upper surface of a pedestal ring (210) having a temporary fixing protrusion (211) on the outer periphery. It stands upright, and a sealing plate (230) is provided below the inside of the pouring tube to seal it, and an annular cut (231) having a V-shaped vertical cross section from the upper surface is provided at a predetermined opening position of the sealing plate. Then, an annular thin line of weakness (232) is formed on the lower surface, and a column (233) connecting the pull ring (234) to the tip is erected on one side of the upper surface near the inside of the annular thin line of weakness. . 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 having a hardness higher than that of the spout by an injection molding method.

The contact sealing ring (1) of one embodiment provided on the lower surface of the top plate of the cap of the liquid paper container spout
As shown in FIG. 2 (a), the contact 11) is in contact with the outer side of the inner sealing ring 112 and has a vertical cross-section of a substantially inverted right triangle, the vertical surface is the outer side, and the contact angle is acute. When the cap (100) is screwed onto the spout (200), the wedge-shaped tip of the contact sealing ring of the cap causes the spout (200) to be attached to the spout (220). It is closely attached to the upper surface.

Further, as shown in FIG. 2B, the contact sealing ring (111) of another embodiment provided on the lower surface of the top plate of the cap of the liquid paper container spout has an inner sealing ring (112). ) Is provided around the outside of the spout (200) with a space provided, and the vertical cross-section is an inverted right-angled triangle, the vertical surface is the outside, and the contact sealing ring with a sharp tip angle is hung vertically. When the cap (100) is screwed and mounted, the wedge-shaped tip of the contact sealing ring of the cap comes into close contact with the upper surface of the spout barrel (220).

Further, as shown in FIG. 2C, the contact sealing ring (111) of another embodiment provided on the lower surface of the top plate of the cap of the liquid paper container spout has an outer side of the inner sealing ring. A contact sealing ring having a vertical cross section of an inverted right triangle with a vertical surface on the inside and an acute tip angle is hung vertically around the spout (200). ) Is screwed and mounted, the wedge-shaped tip of the contact sealing ring of the cap comes into close contact with the upper surface of the spout barrel (220).

The height of the contact sealing ring provided on the lower surface of the top plate of the cap for the liquid paper container spout may be 0.2 mm or more in view of the degree of close contact with the spout, but normally it is 0. .2 to 0.6 mm is preferable from a practical viewpoint.

In the liquid paper container spout of the present invention, when the cap is attached to the spout, the tip of the contact sealing ring which is vertically provided on the lower surface of the top plate of the cap is made of the spout material and the cap material. Depending on the difference in hardness, it deforms by about 0.15 mm on the upper surface of the spout's spout barrel or bites into the upper surface of the spout's spout barrel by about 0.15 mm so that the tip of the contact sealing ring of the cap is spouted. It is completely in close contact with the upper surface of the pouring tube.

The liquid paper container (capacity: 1.8 liters) with the liquid paper container spout of the present embodiment is opened, the contents are poured out, and then the cap is screwed on. When resealed, the tightening torque of the cap is 3 kg.
In the above cases, the container was completely sealed, and no liquid leakage related to the spout occurred.

[0017]

The liquid paper container spout of the present invention is provided with the top surface of the cap and the contact sealing ring of a special shape. Due to this effect, even in a large-capacity liquid paper container, the spout with the cap is used. When resealed, the container can be completely sealed and there is no liquid leakage from the spigot.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a liquid paper container spout according to an embodiment of the present invention.

2 (a) to 2 (c) are explanatory views showing a shape of a contact sealing ring and a state of sealing a mouth portion of a spout of an embodiment of a liquid paper container spout of the present invention, respectively. .

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

FIG. 4 is a cross-sectional view of a conventional liquid paper container spout.

FIG. 5 is an explanatory view showing a shape of a contact sealing ring and a state in which a mouth portion of a spout is sealed, as an example of a conventional liquid paper container spout.

[Explanation of symbols]

10 ... Mouth plug 20 ... container 21 ... Port mounting hole 22 ... Inclined plate 23 ... torso 100 ... Cap 110 ... Top plate 111 ... Contact sealing ring 112 ... Inner sealing ring 120 ... Surrounding wall 121,221 ... Screwing part 200 ... spout 210 ... Pedestal ring 211 ... Temporary fixing protrusion 220 ... Pour out cylinder 230 ... Closure plate 231 ...... annular cut 232 ... Circular thin-walled weak line 233 ... Support post 234 ... Pull ring 240 ...... flange

Continued front page    F-term (reference) 3E060 AA05 AB02 BA02 CF06 DA18                       EA03                 3E084 AA05 AA12 AA34 AB01 BA03                       CA01 CB01 CB02 CB04 CC04                       CC05 DA01 DB12 DC05 FA09                       FB01 GA01 GB01 GB12 GB17                       HB02 HD01 HD04 KB01 LA03                       LB02 LB07 LD01

Claims (4)

[Claims] 1. A spout and a cap screwed onto the spout, wherein the spout has a spout tube standing on an inner peripheral edge of an upper surface of a pedestal ring, and the cap has an inner seal on a lower surface of a top plate. A ring is hung vertically and brought into close contact with the outer side of the inner sealing ring, and a contact sealing ring having a vertical cross-section of a substantially inverted right-angled triangle, a vertical surface on the outer side, and a sharp tip angle is erected on the spout. A stopper for a liquid paper container, wherein a tip of a contact sealing ring of the cap comes into close contact with an upper surface of a spout barrel of the spout when the cap is screwed and mounted. 2. A spout and a cap screwed onto the spout, wherein the spout has a spout tube standing on an inner peripheral edge of an upper surface of a pedestal ring, and the cap has an inner seal on a lower surface of a top plate. A ring is hung vertically, and is provided around the inner sealing ring with a space provided therebetween, and a contact sealing ring having a vertical cross-section of an almost inverted right triangle, a vertical surface being outside, and a tip angle being acute is provided vertically. A stopper for a liquid paper container, wherein a tip of a contact sealing ring of the cap comes into close contact with an upper surface of a spout barrel of the spout when the cap is screwed onto the spout. 3. A spout and a cap screwed onto the spout, wherein the spout has a spout tube standing on an inner peripheral edge of an upper surface of a pedestal ring, and the cap has an inner seal on a lower surface of a top plate. A ring is vertically provided, and the inner sealing ring is provided with a space around the outer periphery thereof, and a contact sealing ring having a vertical cross section of an almost inverted right triangle, a vertical surface of which is an inner side, and a tip angle of which is acute is vertically provided. A stopper for a liquid paper container, wherein a tip of a contact sealing ring of the cap comes into close contact with an upper surface of a spout barrel of the spout when the cap is screwed onto the spout. 4. The stopper for a liquid paper container according to claim 1, wherein a height of a contact sealing ring vertically provided on the lower surface of the top plate of the cap is 0.2 mm or more.