JPH0858827A - Sealing structure for container - Google Patents

Abstract

PURPOSE: To obtain a container-sealing structure that can be produced by a simple mold and can be unsealed without a need of a large force. CONSTITUTION: When a cap body 11 is screwed onto a content pour spout part 2, an unsealing wall part 12 engages with the content pour spout part 2 to limit a screwing dimension in the axial direction of the cap body 11 to be within a fixed dimension L. When the unsealing wall part 12 is removed and the cap body 11 is rotated to have a screwing dimension above the dimension L, a thin wall part 10 of a sealing film 9 is broken by a cutting edge part 13 to be opened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container sealing structure in which a content inlet / outlet portion of a container main body filled with a liquid is sealed with a cap.

[0002]

2. Description of the Related Art As is well known, a structure in which a container for liquid such as soy sauce is sealed with a cap for pouring the contents in and out of the container is widely used. This sealing structure has a structure in which a bottomed cylindrical cap having a female screw formed on the inner surface is screwed onto a cylindrical content pouring / inlet portion having a male screw formed on the outer surface. Then, in order to maintain the quality of the contents before opening, put a sealing film with a ring-shaped finger hook inside the contents pouring port and pull the sealing film by pulling this finger hook when using. The detachable structure is very popular.

[0003]

However, in the above-mentioned conventional container sealing structure, it is necessary to integrally form the sealing film and the finger hook for detaching the sealing film, and therefore, the manufacturing method is required. There is a problem that the mold becomes complicated and the cost is high. In addition, there is also a drawback that a large force is required to pull out the sealing film by pulling a finger on the opening for opening.

The present invention has been made in view of the above circumstances, and can be manufactured by a simple mold.
Moreover, it is an object of the present invention to provide a container sealing structure that does not require a large force when opening.

[0005]

According to a first aspect of the present invention, there is provided a container sealing structure for sealing a content pouring inlet / outlet portion of a container body filled with a liquid with a cap. A cylindrical portion having an external thread formed on the outer surface thereof, the inside of which serves as a passage for the contents between the inside of the container body and the outside, and the inside of the cylindrical portion. A thin sealing film that closes the inside of the portion along a plane orthogonal to its axis, the cap has a tubular portion and a bottom portion, and the male screw is screwed to the inner surface of the tubular portion. A bottomed cylindrical cap body having a free female screw formed therein, and an open end of the tubular part of the cap body, which is detachably connected to the tubular part via a rupturable connecting part. When the cap body is screwed onto the contents pouring port, the contents pouring port is engaged. And an opening wall portion that limits the screwing dimension of the cap body in the axial direction within a fixed dimension L, and the cap body is provided in the cap body so as to project toward the opening portion of the cap body. And a blade portion for breaking and opening the sealing film when the main body is detached from the unsealing wall portion and rotated in a direction in which the screwing dimension exceeds the dimension L. Is.

Further, the container sealing structure according to claim 2 is
2. The container sealing structure according to claim 1, wherein the sealing film is formed integrally with the contents pouring-in / inlet portion, and a portion of the sealing film that abuts the blade portion is a thin-walled portion. It is characterized by.

Further, the container sealing structure according to claim 3 is
The container sealing structure according to claim 1, wherein the sealing film is made of a metal film or a laminated film of a metal and a synthetic resin.

[0008]

According to the container sealing structure of the present invention, the unsealing wall portion engages with the contents pouring port when the cap main body is screwed onto the contents pouring port, and is in the axial direction of the cap main body. Limit the screwing dimension to within a certain dimension L. Then, when the unsealing wall portion is detached and the cap main body is rotated in the direction in which the screwing dimension exceeds the dimension L, the blade portion breaks the sealing film to open it.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with reference to FIGS. In FIG. 1, 1 is a container main body, 2 is a content pouring inlet / outlet portion, and 3 is a cap. As shown in an enlarged scale in FIG. 2, a male screw 6 is formed on the outer surface of the cylindrical portion 5 of the content pouring port 2, and the inside of the male thread 6 is provided with a passage 7 for the content between the inside and outside of the container body 1. It is said that. Further, in the cylindrical portion 5, a thin-walled sealing film 9 that closes the inside of the cylindrical portion 5 along a plane orthogonal to its axis is provided. A thin portion 10 is formed in the sealing film 9 as shown in FIGS.

As shown in FIG. 1, the cap 3 is formed by integrally molding a cap body 11, an opening wall portion 12, and a blade portion 13. The cap body 11 has a bottomed cylindrical shape including a tubular portion 21 and a bottom portion 22.
A female screw 23 is formed on the inner surface of 1 so that it can be screwed onto the male screw 6. The unsealing wall portion 12 is the tubular portion 2 of the cap body 11.
At the open end of 1, a connecting portion 2 that is rupturable with respect to the tubular portion 21.
It is detachably connected via 5. The blade portion 13 is provided in the cap body 11 so as to project toward the opening of the cap body 11.

As shown in FIG. 4, the unsealing wall portion 12 has a connecting portion 2 between each of the perforated small holes 26, 26 ...
5, 25 ... Are connected to the tubular portion 21, and a tongue piece portion 28 is formed on one of the divided end portions which are partially disassembled by the cut 27 in the circumferential direction. The connecting portion 2 by gripping and pulling in the circumferential direction
5, 25 ... Are broken and can be detached from the tubular portion 21.

In the container sealing structure having the above structure, the unsealing wall portion 12 engages with the content pouring port 2 when the cap body 11 is screwed into the content pouring port 2. The screwing dimension of the cap body 11 in the axial direction is limited to within a certain dimension L. Therefore, the sealing film 9 is not broken and the quality of the contents of the container body 1 is not deteriorated. If the cap body 11 is to be turned in the opening direction, it cannot be turned because of the opening wall portion 12, and the quality of the contents is still maintained.

When the cap body 11 is opened, the tongue piece 28 is gripped and pulled in the circumferential direction to break the connecting portions 25, 25, and the opening wall 12 is separated from the cap body 11, and then the cap body 11 is opened. When the screwing dimension is rotated in a direction exceeding the dimension L, the blade portion 13 is rotated and approaches the thin wall portion 10 direction of the sealing film 9, and eventually bites into the thin wall portion 10 and is broken to open. Let Since the sealing film 9 is shattered in this state, the contents can be poured out by removing the cap 3.

According to the sealing structure of the container as described above, it is not necessary to form the finger hook integrally with the sealing film 9, so that it can be formed by a simple mold, and the cost can be reduced. You can Further, since the sealing film 9 can be broken by rotating the cap body 11, a large force is not required for opening.

In FIG. 3, the blade 13 is integrally formed in the circumferential direction, and after the opening wall 12 is detached, the cap body 11 is slightly rotated a little to make the sealing film 9 rupture. Part 1
Although the arrangement of 0 is shown, the blade portion 13 may be arranged at two locations in the circumferential direction, and the cap body 11 may be slightly rotated a half circumference to break the sealing film 9. The arrangement of the thin portions 10 and 10 in that case is shown in FIG.

Further, the sealing film 9 does not necessarily have to be formed integrally with the content pouring port 2 as in the above-mentioned example, and as shown in FIG. 6, the sealing film 9 is synthesized with a metal film or a metal. It may be spread as a laminated film with a resin.

[0017]

According to the container sealing structure of the present invention, since it is not necessary to form the finger hook integrally with the sealing film, the container can be formed by a simple mold, and the cost can be reduced. You can Moreover, since the sealing film can be broken by rotating the cap body, a large force is not required for opening.

[Brief description of drawings]

FIG. 1 is a front sectional view showing a container sealing structure according to an embodiment of the present invention.

FIG. 2 is a front cross-sectional view showing a content pouring port.

FIG. 3 is an example of a thin portion arranged on a sealing film.

FIG. 4 is a side view of the cap.

FIG. 5 is another example of the thin portion similarly arranged on the sealing film.

FIG. 6 is a front cross-sectional view showing a content pouring-out port when the sealing film is a metal film or a laminated film of metal and synthetic resin.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Container body 2 Content pouring / inleting portion 3 Cap 9 Sealing film 10 Thin wall portion 11 Cap body 12 Opening wall portion 13 Blade portion

Claims (3)

[Claims] 1. A container sealing structure for sealing a content pouring port of a container body filled with a liquid with a cap, wherein the content pouring port has an external thread formed on an outer surface thereof. A cylindrical portion whose inside serves as a passage for contents between the inside and the outside of the container body; and a thin walled portion which is provided in the cylindrical portion and closes the inside of the cylindrical portion along a plane orthogonal to its axis. A cap having a sealing film, the cap having a tubular portion and a bottom portion, and a bottomed cylindrical cap body having a female screw formed on the inner surface of the tubular portion, the female screw being threadably attachable to the male screw; When the cap main body is detachably connected to the opening end of the tubular portion of the cap body via a rupturable connecting portion with respect to the tubular portion, and the cap body is screwed to the content pouring port. ,
An unsealing wall portion which engages with the contents pouring port portion and limits a screwing dimension of the cap body in the axial direction within a fixed dimension L, and inside the cap body, in the direction of the opening portion of the cap body. A blade portion that is provided so as to project and that opens and breaks the sealing film when the cap body is detached from the unsealing wall portion and is rotated in a direction in which the screwing dimension exceeds the dimension L. A container sealing structure comprising: 2. The container sealing structure according to claim 1, wherein the sealing film is formed integrally with the content pouring port, and a portion of the sealing film that abuts the blade portion is a thin portion. The container sealing structure is characterized in that 3. The container sealing structure according to claim 1, wherein the sealing film is made of a metal film or a laminated film of a metal and a synthetic resin.