JP2001171714A - Liquid spout tap - Google Patents

Abstract

(57) [Summary] [Problem] To insert a barrier sheet into a disc-shaped spout plug with a flange shape to give directionality, and align the spout plug direction to an ultrasonic welding machine. Be able to supply properly. A flange 3 is provided in a disk shape.
The barrier sheet 9 is provided in a disk shape smaller in diameter than the flange shape to form a barrier material non-existing area 10 around the flange 3. At the position, a cut-shaped concave portion 11 was provided along the flange circumferential direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid spout plug.

[0002]

Conventionally, a spout plug molded from a synthetic resin is often used as a spout for a liquid paper container. The spout plug for a liquid made of synthetic resin has a cap attached thereto. A cylindrical spout having a screw on the outer periphery and a disc-shaped flange protruding from the lower part of the spout over the periphery are integrated, for example, a mounting hole of a container. The spout plug is attached from the inside of the container, and the flange is ultrasonically welded to the container to fix and attach the spout. In addition, the spout stopper is sealed before the start of use such as when distributing the liquid container or at the time of display at a store, and is easily opened when the use of the liquid container is started. There is a structure in which a closing plate is defined by a thin portion therein, and a pull ring is integrally formed on the closing plate via a column, so that the spout can be opened and closed by the closing plate. The pull ring is pulled to start cutting from the thin portion near the column, all the thin portions are cut, and the sealing plate is opened by removing the closing plate. Further, in a liquid spout stopper used for a liquid paper container for storing beverages and the like, in order to prevent external light or oxygen in the air from passing through the spout stopper, a flange is formed from the bottom plate including the above-mentioned closing plate. For example, there is a barrier sheet in which a metal thin film is arranged as a barrier sheet. In this case, the metal thin film is integrally attached by insert molding.

By the way, in the spout plug configured to be opened by pulling the pull ring to remove the closing plate, since the pulling direction of the pull ring is determined, the spout plug itself becomes directional. Also, the operation of pulling the pull ring while holding the liquid paper container is desirably the same from the viewpoint of easy opening operation and prevention of falling of the container, and the operation of pulling the pull ring upward. In this liquid paper container, the pulling direction of the pull ring at the time of opening is determined. Therefore, when manufacturing the liquid paper container, it is necessary to supply the spout plugs to the spout plug mounting device side such as an ultrasonic welding machine with the spout plugs aligned in the same direction. For this reason, at present, the part corresponding to the outer periphery of the flange, which is almost half the circumference, is greatly extended in one direction to make it a different shape that is significantly different from the disk shape, and from the hopper to the parts feeder, use the vibration and bias of the center of gravity position etc. While the direction of the spout plug is automatically aligned, for example, as shown in Japanese Utility Model Application Publication No. Sho 60-112415, the tip of the overhang is straightened. .

[0004] However, the spout is formed by extending a part of the periphery of the flange to the side so that the orientation at the time of mounting is a predetermined direction, and integrating the above-mentioned barrier sheet by insert molding. The following problems occur with plugs. That is, the shape of the flange is not a disk but an irregular shape having a large overhang, and the area of the flange forming portion of the mold becomes considerably larger than the shape of the disk-shaped sheet. When molding, the sheet cannot be positioned with respect to the mold, and there is a problem that the sheet cannot be insert-molded in an appropriate state corresponding to the region including the bottom plate and its periphery. As a spout plug integrally provided with the barrier sheet by insert molding, there is a spout plug shown in Utility Model Registration No. 2506279. In this spout plug, the flange has a disc shape,
Since the barrier sheet to be inserted is also disc-shaped, alignment is possible and a plug having barrier properties can be stably manufactured. However, in this plug, the flange has a disk shape, and the plug cannot be oriented during the supply process to the ultrasonic welding machine. Therefore, the present invention has been made in view of the above circumstances, and an object of the present invention is to insert a barrier sheet so that a spout plug having a disc shape with a flange shape has a directivity. It is an object of the present invention to be able to appropriately supply to an ultrasonic welding machine while keeping the same.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and a closing plate integrally having a pull ring via a column is provided with a thin portion in a bottom plate inside a cylindrical spout. The spout is formed so as to be open and closed by the closing plate so that the spout can be opened, and a flange is provided integrally over the lower periphery of the spout, and extends from the lower surface of the bottom plate including the lower surface of the closing plate to the lower surface of the flange. In the liquid spout plug in which the barrier sheet is integrally provided, the flange is provided in a disk shape, and the barrier sheet is provided in a disk shape smaller in diameter than the flange shape, and the periphery of the flange is provided. The barrier material non-existing area is formed over
A liquid spout plug is provided, wherein a cut-out recessed portion is provided along the flange circumferential direction in the barrier material non-existing area at a position opposite to the column in the metal foil non-existing area. This is to solve the above-mentioned problem. In the present invention, the outer edge of the cut-shaped concave portion can be straight.

[0006]

FIG. 1 shows an embodiment of the present invention.
5 will be described in detail based on the embodiment shown in FIG.
In the drawing, reference numeral 1 denotes a spout made of synthetic resin. The spout 1 has a cylindrical spout 2 and a disc-shaped flange 3 extending over the outer periphery of a lower portion of the spout 2. . In the spout 2, a closing plate 6 integrally having a pull ring 4 via a column 5 is defined by a thin portion 8 in a bottom plate 7 inside the spout 2, and the closing plate 6 Outlet 2
Is openably closed. The closing plate 6 surrounded by the thin portion 8 has a semicircular shape at least half of the outer periphery of the closing plate 6 and the remaining outer peripheral portion has a mountain shape formed by two straight lines, and a closing plate serving as a vertex of the mountain shape portion. A column 5 is raised at the end of the column 6, and the pull ring 4 is continuous with the column 5. The spout 1 has a disc-shaped metal thin film 9 as a barrier sheet on the lower surface of the spout 1, and the lower surface of the bottom plate 7 including the lower surface of the closing plate 6 and the lower surface of the flange 3. The metal thin film 9 is united by insert molding, pulled up with the pull ring 4, and provided so that the thin metal portion 9 is torn at the same position as the thin portion 8 is torn.

The outer dimension of the metal thin film 9 is smaller by about 1 to 2 mm than the outer dimension of the flange 3, thereby forming a barrier material non-existing region 10 around the periphery of the flange 3. The barrier material non-existent area 10
At a position opposite to the column 5 in the inside, a notch-shaped recess 11 extending along the circumferential direction of the flange is provided, and as shown in FIG.
The shape of No. 2 is a hook-like shape including a straight portion in the flange radial direction and a straight portion along the flange circumferential direction. The outer edge 12 of the notch-shaped concave portion 11 is at most about 1 ° from a flange outer edge virtual position 13 shown as an extension of the outer edge of the flange 3.
mm so as to be closer to the center position of the spout plug, and the outer edge 12 and the outer edge 14 of the metal thin film 9 are set so as not to intersect.

When inserting the metal thin film 9,
As shown in FIG. 4, a recess forming portion 16 for forming the cut-shaped recess 11 is provided in a flange forming portion 15 which is a disk shape of a molding die. The metal thin film 9 is arranged so as not to overlap the concave portion forming portion 16. Thereafter, by closing the mold and injecting the synthetic resin, the spout plug 1 made of the synthetic resin into which the metal thin film 9 is inserted is molded. In FIG. 4, the mold of the spout forming portion is not shown for easy understanding of the mold shape of the flange forming portion. The metal thin film 9 whose outer diameter is smaller by about 1 to 2 mm than the outer diameter of the flange corresponding to the lower surface of the bottom plate from the lower surface of the bottom plate does not overlap the concave portion 16 inside the flange forming portion having the disk shape. It is only necessary to perform a simple operation of arranging
Even if the metal thin film is displaced during injection molding, the movement of the metal thin film is regulated by the inner edge of the flange forming portion or the inner edge of the concave portion, which is slightly larger, so that the amount of displacement is extremely small, and The metal thin film is positioned at an appropriate position from the lower surface of the bottom plate to the lower surface of the flange, so that a spout plug having the metal thin film disposed at an appropriate position is obtained.

Further, as described above, since the notch-shaped recess 11 is provided in a part of the disk-shaped flange 3 and is located at a position opposite to the column 5, the spout plug is inserted from the notch-shaped recess 11. The weight balance is shifted from the center position of the spout in the cross-sectional direction passing through the column body 5 through the center side of 1, so that the direction of the spout plug is aligned by vibrations applied at the time of transportation using this shift. Will be able to In the above-described embodiment, the shape of the notch-shaped recess 11 is hook-shaped. However, the present invention is not limited to this, and as shown in FIG.
The shape of the outer edge 12 may be linear.
Further, although a metal thin film is shown as a barrier sheet in the above embodiment, the present invention is not limited to this.

[0010]

According to the liquid spout plug of the present invention described above, a closing plate integrally having a pull ring via a column is formed in the bottom plate inside the cylindrical spout by a thin portion. The spout is closed openably by the closing plate,
A flange is provided integrally over a lower periphery of the spout, and a barrier sheet is provided integrally from a lower surface of a bottom plate including a lower surface of the closing plate to a lower surface of the flange. Is provided in a disk shape, the barrier sheet is provided in a disk shape with a smaller diameter than the flange shape, a barrier material non-existing area is formed around the periphery of the flange, and in the metal foil non-existing area, A notch-shaped concave portion is provided at a position opposite to the column so as to extend along the flange circumferential direction in the barrier material non-existing region. As a result, the spout plug can be arranged at an appropriate position from the bottom surface of the spout to the lower surface of the flange without significant displacement of the barrier metal thin film during molding of the spout plug, and ultrasonic welding of the spout plug is obtained. The present invention has excellent practicability, such as being able to regulate the direction of the spout plug without changing the mechanism for aligning the direction of the spout plug during the transportation to the machine.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing an example of a liquid spout plug according to the present invention in a partially cut-away state.

FIG. 2 is an explanatory diagram showing an example in a cross section passing through a pillar of a pull ring.

FIG. 3 is an explanatory diagram showing an example as viewed from a barrier sheet side.

FIG. 4 is an explanatory view showing a state in which a barrier sheet is arranged on a flange forming portion.

FIG. 5 is an explanatory view showing another embodiment in a state viewed from a barrier sheet side.

[Explanation of Signs] 1 ·············································································································································· Flange forming part 16 ... concave part forming part

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Eiji Miura Inventor F-term (reference) 3-5-1, Taito, Taito-ku, Tokyo 3E060 CF06 DA30 3E084 AA34 AB01 BA03 CA01 CB01 CB02 CB04 CC01 CC03 CC08 DA01 DB12 DC03 FA09 FB01 FD13 GA04 GB04 GB08 GB17 KB01 LA03 LA17 LB02 LB07

Claims (2)

[Claims] 1. A closing plate integrally having a pull ring via a pillar is defined by a thin portion in a bottom plate inside a cylindrical spout, and the spout is closed openably by the closing plate. In a liquid spout plug, a flange is integrally provided over a lower outer periphery of the spout, and a barrier sheet is integrally provided from a lower surface of the bottom plate including a lower surface of the closing plate to a lower surface of the flange. The flange is provided in a disk shape, and the barrier sheet is provided in a disk shape having a smaller diameter than the flange shape, and a barrier material non-existing region is formed around the periphery of the flange. A spout-shaped stopper for liquid, characterized in that a cut-out recessed portion is formed in the inside of the inside of the barrier material at a position opposite to the column, along the flange circumferential direction. 2. The liquid spout plug according to claim 1, wherein an outer edge of the cut-shaped recess is straight.