JP2589341Y2 - Synthetic resin cap - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a synthetic resin cap, particularly a synthetic resin cap having a container opening fitting inner tube for improving the sealing property, in which the container opening fitting inner tube is prevented from falling down due to heat history. It relates to a resin cap.

[0002]

2. Description of the Related Art Conventionally, a synthetic resin cap is provided with a liner on an inner surface of a ceiling wall which is in contact with the top of a bottle or as a means for improving sealing property, as shown in FIG. The container mouth fitting inner cylinder 32 is formed to hang down from the wall 31. The latter means is employed in many caps because the cap can be manufactured in one step and no liner needs to be provided in a separate step. However, the cap of the seal structure using the container opening fitting inner cylinder as shown in FIG. 3 has a phenomenon in which the container opening fitting inner cylinder 32 falls down due to heat history when the filling of the contents of the bottle is performed at a high temperature. It could not be used because it would cause liquid leakage. When the synthetic resin cap is a cap to be attached to the bottle by tapping, the impact of the tapping is directly transmitted to the score 35 that defines the tearing portion 34 with a pull ring provided in the spout 33, and breakage or damage to the score portion occurs. There is a problem that pinholes are generated and sealability is impaired.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems of the conventional synthetic resin cap having a sealing structure with a container opening fitting inner cylinder. Even when the container mouth fitting inner cylinder does not fall inside, and the shock at the time of tapping is transmitted to the score part,
An object of the present invention is to provide a synthetic resin cap having a sealed structure with a container opening fitting inner cylinder that can prevent breakage of a pinhole or the like in a score portion, can enhance sealing performance, and can be applied even at high temperature filling. I do.

[0004]

According to the present invention, there is provided a synthetic resin cap having an opening formed by breaking a container opening fitting outer tube, a container opening fitting inner tube, a top wall, and a tearing portion. In the synthetic resin cap having a spout, the container mouth fitting inner tube hangs down from the inner end of the top wall so as to form a gap between the container mouth fitting outer cylinder and the container mouth portion that closely fits. The lower end is bent so as to form a U-shaped groove inward and rises above the top wall to form a pouring cylinder wall.
In the middle part of the pouring cylinder wall by the score
The problem can be solved by a configuration characterized by providing a partition wall in which a portion is formed . By forming a reinforcing rib at the bottom of the U-shaped groove, the strength of the inner opening of the container opening is more improved, which is desirable.

[0005]

By forming a pouring cylinder wall from the lower end of the container fitting inner cylinder through a U-shaped groove, a double ring structure is formed in the radial direction by the container fitting inner cylinder and the pouring cylinder wall, The cushion effect of the container fitting inner cylinder is improved, and the container is tightly attached to the inner periphery of the container opening, so that the sealing performance is improved. In addition, the strength is also improved, and even if the container is filled with a high-temperature content, there is no inward collapse phenomenon due to the heat history, and the container can be tightly sealed to the inner periphery of the container opening. Therefore, it can be applied to both low-temperature filling and high-temperature filling even though it has a sealing structure using the inner opening of the container opening. Further, since the spout provided with the score is connected to the inner opening of the container via the U-shaped groove, the impact at the time of tapping does not directly apply to the score, as in the prior art. There is no danger of score breaks or pinholes occurring due to the impact at the time of tapping. Further, the U
By providing the reinforcing ribs in the U-shaped groove, the strength of the container fitting inner cylinder can be further improved.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a synthetic resin cap according to an embodiment of the present invention. The synthetic resin cap of the present embodiment is integrally formed of, for example, a medium-density polyethylene resin or the like, and includes a cap main body 1 fitted and attached to a container mouth, and an upper lid 2 integrally formed on the cap main body via a hinge 3. Consists of The cap body 1 has a container mouth fitting outer cylinder 5, a top wall 6, a container mouth fitting inner cylinder 7, and an upper lid fitting wall 8, and is engaged with the inner peripheral lower end of the container mouth fitting outer cylinder 5. A ridge 9 is formed so that the cap can be plugged and fitted to the container mouth.

The container opening fitting inner cylinder 7 is formed to hang down from the inner end of the top wall 6 so as to form a gap between the container opening fitting outer cylinder 5 and the container opening fitting tightly. , The lower end of which is bent inward into a U-shape and rises, thereby forming the spout 1.
0 is formed. Therefore, the spouting cylinder wall 11 is provided at the back of the container mouth fitting inner cylinder 7 through the U-shaped groove 12 to form a double ring structure, thereby increasing the strength of the container mouth fitting inner cylinder 7 and improving the cushion effect. To prevent inward fall when plugging, and closely adhere to the inner peripheral wall of the container opening to improve sealing performance. In the drawing, reference numeral 13 denotes a plurality of reinforcing ribs provided intermittently in the circumferential direction at the lower end of the U-shaped groove 12. By providing the reinforcing ribs, the strength of the container fitting inner cylinder is further improved. And a strong seal is provided. 16 is the pouring cylinder wall 1
1 is a partition wall formed at a position substantially at the same level as the top wall 6, a tear portion 15 is formed on the partition wall by a score 17 , and a pull ring 18 is pulled to tear the score, whereby a spout can be opened. It has become.

The synthetic resin cap of the present invention is constructed as described above, and the spout fitting tube formed on the inner surface of the upper lid 2 by folding the upper lid 2 from the state of FIG. The wall 20 is the spout 10 of the cap body.
And an engaging projection 22 formed on an inner peripheral portion of the end of the skirt wall 21 of the upper lid 2 rides over and engages with the engaging projection 9 formed on the upper lid fitting wall 8 of the cap body. The closed state is maintained. In such a state, the synthetic resin cap is supplied to the capper by the feeder in the step of capping a container such as a bottle, and is plugged at the container mouth. At this time, even in a container whose contents are filled at a high temperature of 70 ° C. or higher, capping with high sealing performance can be performed without the occurrence of an inward collapse phenomenon due to the heat history of the inner wall of the container opening.

FIG. 2 shows another embodiment of the synthetic resin cap of the present invention. In the above embodiment, the upper lid is hingedly connected to the cap main body to be integral, but in this embodiment, the upper lid is screwed to the cap main body. It is a separate body that fits. In this embodiment, in order to screw the upper lid (not shown),
The configuration is the same as that of the previous embodiment except that a screw 26 with which the upper lid is screwed is formed on the upper lid fitting wall 25 of the cap main body 24. However, detailed description is omitted. Note that both of the above embodiments are examples in which a synthetic resin cap is attached to the container mouth by tapping. However, the synthetic resin cap of the present invention is not necessarily limited to the stopper cap and is screwed into the container mouth. It goes without saying that the present invention can also be applied to a cap that is optionally mounted.

[0010]

[Effect of the Invention] The synthetic resin cap of the present invention is configured as described above and has the following special effects. The container mouth fitting inner cylinder has a double ring structure in the radial direction with the pouring cylinder wall through the U-shaped groove, so the cushioning effect is improved, and the container mouth tightly seals with the inner periphery of the container mouth. Good and improved strength, and even if the contents are plugged into a container filled at a high temperature, there is no inward collapse phenomenon due to heat history, and a strong seal can be obtained. Therefore,
The synthetic resin cap of the present invention can be applied to both low-temperature filling and high-temperature filling while having a sealing structure with a container-mouth-fitting inner cylinder. In addition, since the spout provided with the score is connected to the inner opening of the container via a U-shaped groove, the impact at the time of tapping does not directly apply to the score, and the score may be cut. There is no risk of pinholes.
In addition, the lower end of the inner cylinder fitted with the container opening forms a U-shaped groove inward.
So that it rises above the top wall
The wall is formed during or after pouring.
Hygiene because contents do not enter the U-shaped groove and accumulate
It is a target. Further, by providing a reinforcing rib in the U-shaped groove, the strength of the container fitting inner cylinder can be further improved.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of the synthetic resin cap of the present invention.

FIG. 2 is a partial sectional front view of the synthetic resin cap of the present invention.

FIG. 3 is a sectional view of a main part of a conventional synthetic resin cap.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Cap main body 2 Top lid 3 Hinge 5 Container mouth fitting outer cylinder 6 Top wall 7 Container mouth fitting inner cylinder 10 Spout opening 11 Outlet cylinder wall 12 U-shaped groove 13 Reinforcement rib 16 Partition wall 17 score

Claims (2)

(57) [Scope of request for utility model registration] A container opening fitting outer cylinder, a container opening fitting inner cylinder,Summit
The spout that opens by breaking the wall and the tear
A synthetic resin cap having
Is a gap between the outer cylinder of the container and the container.
Formed annularly from the inner end of the top wall to form
Bent so that its lower end forms a U-shaped groove inward.
CringeStand up above the top wall to form the pouring cylinder wall
In the middle part of the pouring cylinder wall by the score
Provided a partition with formed partSynthetic resin key characterized by the following:
Cap. 2. The synthetic resin cap according to claim 1, wherein a reinforcing rib is formed at a bottom of said U-shaped groove.