JP2001072099A - Cap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To exhaust air interposed between a fitting section and a mouth section, strengthen further the shutting-off of atmosphere and prevent the lowering of the fitting force to the minimum when a synthetic resin cap is capped and fitted on the mouth section of a glass liquid container. SOLUTION: At least one through-hole 9 is formed on a top wall 4 of a fitting section 7 connecting an outer cylinder 5 with an inner cylinder 6 of a cap 8, and a flexible tongue piece 10 for setting the through-hole 9 in the state of being sealed from inside when the fitting of the fitting section 7 is completed is formed integrally with the fitting section 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cap made of a synthetic resin such as an inner plug fitted to the mouth of a liquid container made of glass or the like.

[0002]

2. Description of the Related Art FIG.
The present invention relates to a lid made of a synthetic resin disclosed in Japanese Patent Application Laid-Open Publication No. H11-209,878. In the figure, reference numeral 3 denotes a shielding portion for shielding the mouth portion 2 protruding from the container 1 and has a plug shape. Reference numeral 7 denotes an outer tube 5 and an inner tube 6 which are connected by a top wall 4 at a fitting portion.
11 is a cover, 9 is a through hole formed in the top wall.

[0003] The lid made of such a synthetic resin is filled with the contents of the container at a high temperature, and the fitting portion 7 is formed in the opening 2 protruding from the container 1.
When the cap is attached, the air remaining between the fitting portion 7 and the mouth portion 2 flows upward through the through hole 9, so that the cap 8 is attached deeply in the mouth portion 2 and there is no danger of falling off. .

In the above example, the through hole 9 is provided in the top wall 4, but instead of this, an air vent groove may be formed in the inner periphery of the outer cylinder 5 as shown in FIG. That is, the mouth 2
A ring-shaped ridge 5a that fits into the constricted recess 2a is formed on the inner periphery of the outer cylinder 5, and the ridge 5a is provided with a large number of air extraction grooves 13 having a U-shaped cross section.

When the lid made of such a synthetic resin is filled with the contents of the container at a high temperature and the fitting part 7 is plugged into the mouth part 2 protruding from the container 1, the fitting part 7 and the mouth part 2 are attached. The air remaining between the two flows out downward through the air vent groove 13, so that the mounting failure due to the remaining air is prevented.

[0006]

However, a cap made of a synthetic resin such as an inner plug is provided with a liquid container 1 made of glass or the like.
In the former example, since the contents of the container are filled at a high temperature, the inside of the container is depressurized when cooled to room temperature after filling. It becomes easy to enter into the container, and when the contents of the container are food, there is a possibility of causing spoilage and the like. In the latter example, the air extraction groove 13 having a U-shaped cross section is difficult to spread at the time of fitting, and the restoring force is not sufficient. Therefore, there is a problem that the fitting force is reduced and the fitting force is easily released.

SUMMARY OF THE INVENTION The present invention has been made to solve these problems. When a synthetic resin cap such as an inner stopper is attached to a mouth of a liquid container made of glass or the like, the stopper is attached.
It is an object of the present invention to obtain a cap that discharges air interposed between the fitting portion 7 and the mouth portion 2, further enhances the cutoff with the outside air, and can minimize a decrease in fitting force.

[0008]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above object, and the cap according to the first aspect of the present invention has an openable shielding portion 3 for shielding an opening 2 projecting from a container 1. And a synthetic resin cap 8 having a fitting portion 7 composed of an outer cylinder 5 and an inner cylinder 6 connected by a top wall 4.
In the above, at least one through hole 9 is provided in the top wall 4, and a flexible tongue piece 10 that seals the through hole 9 from the inside at the end of the fitting of the fitting portion 7 with the fitting portion 7. It is formed integrally.

According to a second aspect of the present invention, there is provided a cap which can be opened and shields an opening which projects from a container, and an outer cylinder and an inner cylinder connected by a top wall. A synthetic resin cap having a ring-shaped ridge 5a formed on the inner periphery of the outer cylinder 5 and having a fitting portion 7 made of A plurality of slit grooves 13 for ventilation are formed at symmetrical positions with respect to the central axis of the ridge.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention; 1 and 2 are partially cut front views. In the figure, 1 is a container, 2
Is a mouth portion, and 3 is a shielding portion, which has a thin score 3a and a pull tab 14, and can be cut and pulled out along the score. 5 is an outer cylinder fitted to the mouth 2, 4 is a top wall fitted on the upper curved surface of the mouth 2, 6 is an inner cylinder, and 16 is an annular spout. An inner plug 20 made of soft polyethylene is formed by the outer cylinder 5, the top wall 4, the inner cylinder 6, the spout 16, and the shielding portion 3.

Reference numeral 30 denotes a fitting ring made of polypropylene, which is fitted to the inner plug 20. A horizontal ring 31 protrudes from the inside of the upper part of the fitting ring 30, and comes into contact with the shoulder of the inner plug 20. Mating ring 30
, An outer lid 33 is integrated via a hinge 32, and the opening of the fitting ring 30 can be sealed by the outer lid 33. An inner ring 34 and an outer ring 35 protrude from the outer lid 33, and when the outer lid is closed, the spout 16 comes into contact between the inner ring 34 and the outer ring 35. I will not.

The top wall 4 is provided with at least one through-hole 9, and an inverted bowl-shaped recess 9 a is formed on the mouth 2 side of the through-hole 9, and a flexible tongue 9 is formed in the bowl-shaped recess 9 a. The piece 10 is integrally formed at the time of injection molding via the connecting portion 10a, whereby the through hole 9 can be sealed from the inside when the fitting of the fitting portion 7 is completed. FIG. 1 is an embodiment diagram in which the connecting portion 10a is set inside, and FIG. 2 is an embodiment diagram in which the connecting portion 10a is set outside.

Next, the operation of the present invention according to claim 1 will be described. When the fitting portion 7 is fitted to the inner plug 20 in advance and the tapping is performed, air remaining inside the fitting portion 7 flows out of the bowl-shaped recess 9a through the through hole 9 and then passes through the through hole 9. Is sealed by the flexible tongue piece 10 from the inside, so that the fitting ring 30 and the mouth 2 are in close contact with each other, and the cap is prevented from coming off. When the contents of the container are filled at a high temperature, when the container is cooled to room temperature after the filling, the inside of the container is decompressed, so that the outside air tends to enter. There is no danger of bacteria invading inside.

Next, an embodiment of the invention according to claim 2 will be described with reference to FIGS. The same parts as those in FIG. 1 are denoted by the same reference numerals, and detailed description is omitted. Reference numeral 8 denotes a cap made of a synthetic resin made of soft polyethylene.
An openable shielding portion 3 for shielding the more protruding mouth portion 2;
And a fitting portion 7 comprising an outer cylinder 5 and an inner cylinder 6 connected by a top wall 4. A ring-shaped ridge 5 a which press-fits into the constricted concave portion 2 a of the mouth 2 has an inner periphery of the outer cylinder 5. And a plurality of slit grooves 13 for ventilation having an acute V-shaped cross section are formed at symmetrical positions with respect to the center axis of the ridge 5a.

Next, the operation of the present invention according to claim 2 will be described. When the fitting portion 7 composed of the outer cylinder 5 and the inner cylinder 6 connected by the top wall 4 is fitted to the mouth 2 projecting from the container 1 filled with the high-temperature liquid by tapping, a ring-shaped ridge 5a is provided. Since the ventilation slit groove 13 once expands when it crosses the large diameter portion of the mouth 2, the air between the top wall and the mouth 2 is reliably discharged through the ventilation slit groove 13. On the other hand, a ring-shaped ridge 5 over the large diameter portion of the mouth 2
Since a is fitted into the constricted recess 2a of the mouth 2, after the mounting is completed, the ventilation slit groove 13 having a sharp V-shaped cross section having a large elastic restoring ability is restored to the original shape, so that the fitting force is reduced. It does not decline. Further, as shown in FIG. 4, since the slit groove 13 is formed at a symmetrical position with respect to the center axis,
The fitting and holding operation is performed in a well-balanced manner. Note that the ventilation slit groove 13 is usually formed at the time of molding the cap, but it can also be formed by cutting the tip of the ring-shaped ridge in the vertical direction after molding the cap.

The present invention according to claim 1 and the present invention according to claim 2 may be performed simultaneously or separately.

[0017]

Since the present invention is configured as described above, it has the following effects.

The cap according to the first aspect of the present invention has at least one through hole 9 in the top wall 4 of the fitting portion 7 and seals this through hole 9 from the inside when the fitting of the fitting portion 7 is completed. The flexible tongue piece 10 to be in a state is formed integrally with the fitting part 7, so that when the stopper is fitted to the fitting part and the mouth part 2 protruding from the container 1, the fitting part 7 and the mouth part are fitted. Since the air remaining between the cap 2 and the outlet 2 flows upward through the through hole 9, the cap 8 is mounted deeply in the mouth 2, and there is no possibility of the cap 8 coming off. In addition, after the contents of the container are filled with the contents at a high temperature, when the container is cooled, the inside of the container is decompressed, so that the outside air tends to enter. However, since the flexible tongue 10 seals the container, bacteria and the like are contained in the container. There is no risk of intrusion.

According to a second aspect of the present invention, there is provided a cap made of a synthetic resin having a ring-shaped ridge 5a formed on the inner periphery of the outer cylinder 5 so as to press-fit into a narrow concave portion of the mouth. By forming a plurality of V-shaped ventilation slit grooves 13 at symmetrical positions with respect to the center axis of the ridge, air remaining between the fitting portion 7 and the mouth portion 2 flows downward through the air vent groove 13. Since the air flows out, the defective mounting due to the remaining air is prevented, and the once expanded ventilation slit groove 13 is easily elastically restored to its original shape, so that the fitting force does not decrease. Further, the fitting and holding operation is performed in a well-balanced manner.

[Brief description of the drawings]

FIG. 1 is a partially cut front view of a cap according to the first embodiment of the present invention.

FIG. 2 is a partially cutaway front view of the cap according to the first aspect of the present invention, in which a mounting position of a flexible tongue is changed.

FIG. 3 is a partially cut front view of a cap according to the invention of claim 2;

FIG. 4 is a plan view of a main part of a cap according to the invention of claim 2;

FIG. 5 is a sectional view of a known cap disclosed in Japanese Utility Model Laid-Open Publication No. 64-29156.

FIG. 6 is a sectional view of a main part of a known cap.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Container 2 Mouth 2a Constriction concave part 3 Shielding part 4 Top wall 5 Outer cylinder 5a Ridge 6 Inner cylinder 7 Fitting part 8 Cap 13 Vent slit groove 14 Pull tab 16 Discharge port 20 Inner plug 30 Fitting ring 31 Horizontal ring 32 Hinge 33 Outer lid 34 Inner ring 35 Outer ring

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3E084 AA12 AA32 AB01 BA03 CA01 CB01 CB02 CB04 CC04 CC05 DA01 DB13 DC04 DC05 FA03 FA09 FC07 GA06 GA08 GB06 GB08 GB12 HA03 HB02 HD03 HD04 KA02 KB01 LA03 LA18 LB02

Claims (2)

[Claims] 1. A synthetic resin cap having an openable shielding portion for shielding an opening protruding from a container, and a fitting portion comprising an outer cylinder and an inner cylinder connected by a top wall. A cap provided with at least one through hole in the wall, and a flexible tongue piece for forming the through hole into a sealed state from the inside when the fitting of the fitting portion is completed is formed integrally with the fitting portion. . 2. A press-fit connection with a constricted concave portion of the mouth portion, comprising a cover portion capable of opening the mouth portion protruding from the container, and a fitting portion comprising an outer cylinder and an inner cylinder connected by a top wall. In a synthetic resin cap having a ring-shaped ridge formed on the inner circumference of the outer cylinder, a plurality of V-shaped ventilation slit grooves having an acute cross section are formed at symmetrical positions with respect to the center axis of the ridge. And cap.