JPH0343159Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a cap that is assembled to the mouthpiece of a container to open, close, and seal the mouthpiece of a container.

[Conventional technology]

The cap, which can be detachably attached to the mouth of the container, is popular due to its good formability and economical advantages.
Most of them are molded from synthetic resin materials, and the means for assembling them with the mouth tube is screwed or undercut means.

In this way, the means for assembling the cap to the mouth tube utilizes engagement means such as screws or undercuts, so if the cap is molded from synthetic resin material, the material will be damaged due to long-term engagement. There is a risk that the assembly strength of the cap to the mouthpiece may deteriorate due to fatigue and permanent deformation, etc.
When the cap is molded as an integral molding made of synthetic resin, the appearance deteriorates due to the phenomenon of "shrinkage", making it impossible to mold a thick molded product, and as a result, there have been complaints that the cap has a poor texture.

As conventional techniques for solving the above-mentioned inconveniences and dissatisfaction, there are disclosed
There is a technique for configuring a cap using a combination disclosed in Japanese Patent No. 20275.

The conventional technology shown in Utility Model Application Publication No. 49-38647 is
A cylindrical body made of synthetic resin with a thread carved on its inner circumferential surface is fitted and fixed in a lid body formed into a crested cylindrical shape of synthetic resin, glass, or metal so that it cannot rotate freely. It is constructed by sandwiching and fixing packing between the upper end surface of the cylindrical body and the top wall portion of the lid body. In the technique disclosed in this Japanese Utility Model Publication No. 49-38647, the cylinder body that is threadedly connected to the opening of the container and the lid body that forms the appearance of the cap are separately molded. The lid body can be made of a synthetic resin material suitable for screwing, and the lid body can be molded from a material that provides an excellent appearance, and the lid body is free from the risk of "shrinkage" due to the threaded shape. Since there are no cracks, it has the advantage of being able to be molded with sufficient thickness.

In addition, the prior art disclosed in Japanese Utility Model Publication No. 53-20275 discloses that a part of the mold surface of an inner cap is pre-formed into a crested cylindrical shape made of synthetic resin with a thread carved into the inner circumferential surface of the peripheral wall. An outer cap having a desired wall thickness and a crested cylindrical shape is insert-molded to cover the outer surface of the inner cap. Regarding the technology shown in this Utility Model Publication No. 53-20275,
The inner cap can be molded from a synthetic resin material that is advantageous for threaded connection without considering the appearance.
In addition, the outer cap that forms the external appearance of the cap has no irregularities such as threads that can cause "shrinkage", so even if the outer cap is molded thickly, the cap will have a smooth outer surface. The advantage is that it can be done.

[The problem that the idea aims to solve]

However, in the above-mentioned conventional technology,
Since the threaded connection part of the cap to the mouthpiece of the container is made of synthetic resin, there is a problem in that the sealing ability of the mouthpiece deteriorates due to material fatigue and permanent deformation when the mouthpiece is kept sealed for a long period of time. There is a problem that has not been completely resolved.

In addition, the structure of the outer cap can give the cap a sufficient texture, but since the outer cap is in contact with the outer surface of the inner cap, if the outer cap is formed to be thick, the thickness will increase. However, there is a problem in that a large amount of expensive synthetic resin material is consumed.

Incidentally, as a conventional technique in which the threaded part for the mouthpiece of the container is made of metal, there is a technique disclosed in Publication of Utility Model Publication No. 11-1861.
The prior art disclosed in the publication involves folding the cylindrical wall of a metal helical tube, which is a cylindrical inner cap, into a metal canopy, which is an outer cap formed into a cylindrical shape. The cap is constructed by caulking and fixing the lower edge of the cap, but since the entire cap is made of expensive metal material, the unit cost of raw materials is high, and the work of assembling and fixing the inner cap and outer cap is extremely troublesome. There is a problem in that, due to the means for assembling and fixing the inner cap to the outer cap, it is not possible to construct the entire cap with a sufficient texture.

Therefore, the present invention was devised to solve the above-mentioned problems in the conventional technology. It solves the problem of assembling the cap to the container mouthpiece, and also provides the cap with a sufficient texture with less material consumption. The purpose of this invention is to provide a cap that achieves and maintains a strong and stable attachment to the mouthpiece and has a good appearance.

[Means to solve the problem]

The means of the present invention for solving the above-mentioned technical problems relates to the structure of a cap that is assembled into the mouthpiece of a container and seals the mouthpiece; It has a metal ring body which is integrally connected to the cylindrical outer wall at the lower end and has an engaging part on the inner circumferential surface of the inner wall that engages with the outer circumferential surface of the mouth tube, and a flat plate with a diameter equal to the outer diameter of the outer wall. It has a top wall made of synthetic resin, which has a cylindrical wall that has an outer diameter equal to the inner diameter of the outer wall and is tightly fitted into the outer wall, hanging from the lower surface of the top plate that seals the mouth pipe. , It is in.

[Effect]

The engaging part that achieves and maintains the attachment of the cap to the mouthpiece of the container is molded on the inner peripheral surface of the inner wall of the metal ring body, so even if the cap is assembled to the mouthpiece of the container for a long period of time, In addition, even if the cap is repeatedly attached and detached, the toughness, high shape retention force, and stable elastic deformation of the metal material allow the cap to be stably and firmly attached to the mouthpiece. Due to the assembly holding force generated between the cap and the mouth tube, material fatigue does not occur in the engaging portion of the cap, nor does permanent deformation occur in the engaging portion.

The sealing of the mouthpiece is achieved by the top plate of the top wall body making close contact with the entire upper end surface of the mouthpiece, but since the top wall body is made of synthetic resin, the lower surface of the top plate does not tightly contact the upper end surface of the mouthpiece. Good contact can be achieved, and the action of the ring body allows the top plate to strongly press against the upper end surface of the mouthpiece, thereby stably and reliably achieving and maintaining the container's airtightness.

The engaging portion of the cap for the mouth tube is formed on the inner circumferential surface of the inner wall of the ring body, while the outer circumferential surface of the cap is formed on the outer circumferential surface of the outer wall of the ring body. Thickness and external shape are
It can be freely set and formed without being restricted by the shape and dimensions of the inner wall forming the engaging portion and without increasing the consumption of molding material.

The ring body and the top wall body are assembled by simply fitting the cylindrical wall of the top wall body into the outer wall of the ring body, so the assembly work is extremely simple, and the top wall body is made of synthetic resin. By utilizing the elasticity of this synthetic resin material, the cylindrical wall can be firmly and smoothly fitted into the outer wall.

The outer circumferential surface of the cap is formed by the outer wall of a highly decorative metal ring, making it possible to obtain a cap with excellent exterior decoration, and the operating force for attaching and detaching the cap is controlled by the engaging portion. Since it mainly acts on the provided inner wall and the integrated outer wall, the operation of attaching and detaching the cap to and from the spout can be achieved smoothly and satisfactorily.

〔Example〕

Embodiments of the cap according to the present invention will be described below with reference to the drawings.

In the illustrated embodiment, the lower ends of the inner wall 6 and the outer wall 7, which are coaxially arranged, are integrally connected at a flange 8 to form a metal ring body 5, and the inner peripheral surface of the inner wall 6 In the case of the embodiment shown in FIG.
In the case of the embodiment shown in FIG.
It is an engaging bullet piece 10 that engages from below,
This engaging elastic piece 10 is formed by half punching the inner wall 6.

The top wall body 11 made of synthetic resin is constructed by suspending a cylindrical wall 13 from the lower surface of the top plate 12, and the cylindrical wall 13 is fitted into the outer wall 7 with a gap formed between it and the inner wall 6. ing.

Therefore, a gap is formed between the inner wall 6 and the cylindrical wall 13, and the upper end of the inner wall 6 is more likely to be elastically deformed than the lower end.
In the embodiment shown in FIG. 1, by utilizing the elasticity of the inner wall 6, the screwing of the cap to the mouth tube 2 can be achieved and maintained smoothly and stably.
In the illustrated embodiment, it is possible to obtain smooth and good elastic deformation of the engaging elastic piece 10, which allows the engaging elastic piece 10 to get over the circumferential line 4 and the engaging elastic piece 10 to 4 can be achieved and maintained smoothly and firmly.

Note that the inner wall 6 that provides the engagement and assembly portion for the mouthpiece 2 is limited in its overall shape to a short cylindrical shape, but the outer wall 7, which is not related to the action of assembly to the mouthpiece 2, has a shape that is There is no limitation, and for example, it may be shaped like a square cylinder to match the external shape of the container 1.

[Effect of idea]

Since the present invention has the above-described configuration, it has the following effects.

Since the engaging part of the cap to the mouthpiece of the container is made of metal, there is no deterioration in the assembly of the cap to the mouthpiece due to material fatigue or permanent deformation, and this makes it easy to assemble the cap to the container. It can be stably and firmly maintained over a long period of time, and the container can be reliably and tightly sealed over a long period of time, and even after repeated use, it can be assembled and maintained tightly. Power never decreases.

It is constructed by a combination of a metal ring body and a synthetic resin top wall body, and can be assembled by simply fitting the top wall body into the ring body, so it is extremely easy to manufacture.

As the attachment action to the container is achieved by the metal ring body, and the sealing of the container is achieved by the synthetic resin top wall, it is possible to obtain stable attachment of the cap to the container, and also to secure the container. A good seal can be achieved and maintained.

Since it has a ring body and a double cylinder shape, it is possible to obtain a large thick cylinder part with a small amount of material, thereby making it possible to obtain a cap with excellent texture.

Since the outer wall, which is the main part on which the operating force acts on the cap, is integral with the inner wall, which is the main part when the cap is assembled to the container, the operating force applied to the cap is effectively applied to the assembly and removal of the cap to the container. will be done.

Since the outer wall of the metal ring body forms the outer peripheral surface of the cap, the excellent decorative properties of metal can be effectively utilized.

[Brief explanation of the drawing]

FIG. 1 is an overall vertical sectional view showing an embodiment of the present invention. FIG. 2 is an overall vertical sectional view showing another embodiment of the present invention. Explanation of symbols, 1... Container, 2... Mouthpiece, 3...
Thread, 4... Circumferential thread, 5... Ring body, 6... Inner wall, 7... Outer wall, 8... Flange, 9... Thread, 10
...Engaging bullet piece, 11...Top wall body, 12...Top plate,
13... Cylinder wall.

Claims (1)

[Claims for Utility Model Registration] A cap that is attached to the mouthpiece of a container and seals the mouthpiece, which connects a short cylindrical inner wall and a short cylindrical outer wall arranged coaxially at the lower end. a metal ring body provided with an engaging portion on the inner circumferential surface of the inner wall that engages with the outer circumferential surface of the spout; A cap comprising: a synthetic resin top wall body having a cylindrical wall hanging from the bottom surface of a top plate having an outer diameter equal to the inner diameter of the outer wall and firmly fitting into the outer wall;