JPH0840444A - Bottle cap for thin bottles - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a bottle cap for a thin bottle capable of completely preventing liquid leakage. [Structure] According to the present invention, the inner wall of the top plate (20) of the bottle cap has a convex inner ring (21) closely contacting the inner wall of the bottle mouth cylinder (30), and the bottle mouth cylinder (30). In a screw-fitting type bottle cap provided with a contact ring (22) in a convex shape closely attached to the top wall of the bottle cap, the inner wall of the top plate (20) of the bottle cap is provided with a bottle mouthpiece (30). A bottle cap for thin-walled bottles, characterized in that a convex-shaped auxiliary ring (23) is provided so as to be in close contact with the outer wall of the bottle.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bottle cap for thin-walled bottles capable of completely preventing liquid leakage.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 2, an inner wall of a top plate (20) of a bottle cap is provided with an inner ring (21) having a convex shape closely contacting with an inner wall of a barrel body (30) of a bottle. , A convex contact ring close to the top wall of the bottle mouthpiece (30)
A screw-fitting type bottle cap provided with (22) and capable of completely preventing liquid leakage is widely used.

[0003]

[Problems to be Solved by the Invention] In connection with recent resource conservation measures related to the global environment and with recent advances in plastic bottle molding technology, polyethylene (PE), polypropylene (PP) and Thin-walled bottles such as polyester (PET) are widely used.

However, when these thin-walled bottles are covered with the conventional screw-fitting type bottle caps shown in FIG. 2, the bottle cylinder (30) is thin and has low rigidity. The problem is that it is pushed by the inner ring (21) of the cap and the mouth tube body (30) of the bottle is expanded, and the bottle mouth tube body (30) is thin and the width of the top wall is narrow. In addition, the bottle mouthpiece (30) is pushed open and the contact ring (22) of the bottle cap comes off, which causes liquid leakage in the conventional screw-fitting bottle caps. It is what

[0005]

In order to solve the above problems, according to the present invention, as shown in FIG. 1, the bottle cap (30) is provided on the inner wall of the top plate (20) of the bottle cap. Inner ring (21) close to the inner wall of () and the contact ring (2) close to the top wall of the bottle mouthpiece (30).
2) In the screw-fitting type bottle cap provided with and,
On the inner wall of the top plate (20) of this bottle cap, a convex ridge-shaped auxiliary ring so as to be in close contact with the outer wall of the bottle barrel (30).
The provision of (23) provides a bottle cap for thin-walled bottles capable of completely preventing liquid leakage.

[0006]

In the bottle cap for thin-walled bottles of the present invention, as in the conventional screw-fitting type bottle cap, as shown in FIG. 1, the top plate (2
The inner wall of (0) is provided with a convex-shaped auxiliary ring (23) so as to be in close contact with the outer wall of the bottle mouthpiece (30). Tube (30)
Fit between the inner ring (21) and the auxiliary ring (23) so that even if the bottle mouthpiece (30) is thin and has low rigidity, it will be attached to the inner ring (21) of the bottle cap. Even if the mouthpiece (30) of the bottle is not pushed and spread, and even if the mouthpiece (30) of the bottle is thin and the top wall is narrow, The mouth tube body (30) is not expanded and the contact ring (22) of the bottle cap is not removed, and the mouth of the bottle is provided on the inner wall of the top plate (20) of the bottle cap. The convex inner ring (21) closely contacting the inner wall of the cylinder (30) and the convex contact ring (22) closely contacting the top wall of the bottle mouth cylinder (30) are the same as before. And effectively prevents the liquid leakage of the bottle cap for thin-walled bottles of the present invention.

[0007]

1 is a partial sectional view of a bottle cap for a thin bottle according to an embodiment of the present invention. That is,
On the inner wall of the top plate (20) of the bottle cap,
Close to the inner wall of (30), a convex inner ring (21) having a slanted wall (a) at the lower end of the outer wall, and a close end to the top wall of the bottle mouth barrel (30), the lower end having an acute convex Ridge-shaped contact ring
In a screw cap type bottle cap having (22) and (22), the inner wall of the top plate (20) of the bottle cap is closely attached to the outer wall of the bottle mouthpiece (30) as shown in FIG. , (B),
It shows a state in which a bottle cap for thin-walled bottles of the embodiment, which is provided with the convex-shaped auxiliary ring (23) shown in (C), is manufactured.

The auxiliary ring (23) shown in FIG. 1 (A), which is provided in close contact with the outer wall of the bottle mouthpiece (30) of this embodiment, is slanted to the lower end of the inner wall. A convex ring having a wall (b), an auxiliary ring (23) similar to the inner ring (21)
Is provided on the inner wall of the top plate (20) of the bottle cap, and the mouthpiece body (30) of the bottle is firmly pushed between the inner ring (21) and the auxiliary ring (23). It can be fitted, and prevents the mouth tube body (30) of the bottle from being expanded and completely prevents liquid leakage.

Further, in this embodiment, the convex-shaped auxiliary ring (23) shown in FIG. 1 (B), which is provided so as to be in close contact with the outer wall of the bottle mouthpiece (30), has a vertical direction on the inner wall. A large number of convex
A convex-shaped auxiliary ring (23) having (c, c, c, ...) Is provided on the inner wall of the top plate (20) of the bottle cap, and the bottle barrel (30) is inner. Ring (21) and auxiliary ring (2
It can be easily fitted even if there is uneven thickness during molding, and prevents the bottle mouthpiece (30) from being expanded and completely prevents liquid leakage. It was done.

Further, in this embodiment, the convex-shaped auxiliary ring (23) shown in FIG. 1 (C), which is provided so as to be in close contact with the outer wall of the bottle mouth barrel (30), has a horizontal direction on the inner wall. The same as the contact ring (22), the auxiliary ridge-like ring (23) having two rows of ridges (d, d) is provided on the inner wall of the top plate (20) of the bottle cap. , Fit the bottle mouthpiece (30) between the inner ring (21) and the auxiliary ring (23),
Liquid leakage can be prevented even by these two rows of convex ridges (d, d), and the mouth cylinder (30) of the bottle is prevented from being expanded and the liquid leakage is completely prevented. .

In the bottle cap for the thin-walled bottle of the present embodiment, the same screw-fitting type bottle cap as the conventional one is used, and the inner wall of the top plate (20) of this bottle cap is
1 so that it closely contacts the outer wall of the bottle mouthpiece (30).
By providing the convex-shaped auxiliary ring (23) shown in (A), (B), and (C), the bottle mouth cylinder (30) is fitted with the inner ring (2).
It is fitted between the 1) and the auxiliary ring (23) to prevent the mouthpiece body (30) of the bottle from being spread, and it is provided on the inner wall of the top plate (20) of the bottle cap. Also, a convex inner ring (21) closely contacting the inner wall of the bottle mouth barrel (30), and a convex contact ring (22) closely contacting the top wall of the bottle mouth barrel (30). However, it effectively works as in the conventional case, and the liquid leakage of the bottle cap for the thin-walled bottle of this embodiment can be completely prevented.

[0012]

As described above, in the operation and the embodiment, in the bottle cap for the thin-walled bottle of the present invention, the same screw-fitting type bottle cap as the conventional one is used, and the inner wall of the top plate (20) of this bottle cap is The bottle mouthpiece (3
By providing the convex-shaped auxiliary ring (23) so as to be in close contact with the outer wall of (0), the mouthpiece body (30) of the bottle is fitted between the inner ring (21) and the auxiliary ring (23). Even if the mouthpiece (30) of the bottle is thin and has low rigidity, the mouthpiece (30) of the bottle is not spread and the mouthpiece of the bottle is Even if the (30) is thin and has a narrow top wall, the bottle cap contact ring (22)
The inner ring of the bottle cap (20), which is provided on the inner wall of the top plate (20) of the bottle cap, which is in close contact with the inner wall of the bottle mouth barrel (30), and the bottle Convex contact ring (22) closely attached to the top wall of the mouth cylinder (30)
That is, it is possible to provide a bottle cap for a thin-walled bottle that can effectively prevent liquid leakage as in the conventional case.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view of a bottle cap for a thin bottle according to an embodiment of the present invention.

FIG. 2 is a partial cross-sectional view of a conventional screw-fitting type bottle cap.

[Explanation of symbols]

 20 ... Top plate of bottle cap 21 ... Inner ring 22 ... Contact ring 23 ... Auxiliary ring 30 ... Bottle mouth a, b ... Slanted wall c, d ... Convex

Claims (1)

[Claims] Claims: 1. The inner wall of the top plate (20) of the bottle cap, the inner ring (21) having a convex shape closely contacting the inner wall of the mouth cylinder (30) of the bottle, and the mouth cylinder of the bottle (30). In a screw-fitting type bottle cap having a convex-shaped contact ring (22) closely attached to the top wall, the top face plate (2
A bottle cap for a thin-walled bottle, characterized in that an inner ring of (0) is provided with an auxiliary ring (23) in a convex shape so as to be in close contact with the outer wall of the bottle mouthpiece (30).