JPS6030182Y2 - Sealing mechanism of pressure container - Google Patents

Description

[Detailed description of the invention] The present invention relates to a sealing mechanism for pressure-resistant containers, and is a preferred mechanism for stably and accurately sealing the mouth of aluminum-based containers for storing beer and other sparkling beverages. This is what we are trying to provide.

BACKGROUND ART There have been a number of proposals and implementations of sealing the mouth of a pressure-resistant container made of aluminum metal for storing sparkling beverages such as beer by capping the mouth.

In other words, if aluminum-based metals are used for such containers, there is no risk of breakage, and the containers are lightweight and especially thin, which is convenient for transport and handling, and also has an efficient cooling effect. There are benefits that can be given.

Incidentally, in such a container, it is preferable that the mouth part is also formed in a series from the thin metal layer described above, but it is natural that such a mouth part should be sealed with a cap. The work is not necessarily easy.

In order to seal the opening of the lid, since the material itself is made of a thin aluminum material as mentioned above, the tip of the opening is formed into a curled part that is bent outward, and the tip of the curled part is further bent. By bending it inward and joining it at right angles to the outer surface of the mouth part, a certain degree of strength is given to the curling part, and a cap on which a backing layer is formed is covered and tightened to such a curling part. By abutting the tip of the curling part against the outer surface of the mouth as described above, the curling part is intended to maintain the strength to withstand the clamping pressure of the cap during sealing.

However, in the case of such conventional products, although it is natural that the curling part is processed to make its dimensions constant when mass-producing it using a press machine, etc., the curling part is formed so as to abut against the outer surface of the mouth. It is difficult to do so and some error intervention is inevitable, and as mentioned above, the thickness of the material itself is 0.57rI! Since it is a thin layer as shown below, the tip of the curling part bent inward at right angles does not necessarily join to the outer surface of the mouth part, that is, in order to ensure the above joining relationship, the above error is required to be negative. If the dimensions are insufficient, a gap will remain between the tip of the curling part and the outer surface of the mouth, making it impossible to obtain the desired strength of the curling part, and therefore It has disadvantages and drawbacks such as not being able to properly seal the seal.

The present invention was devised after repeated studies in view of the above-mentioned actual circumstances.

That is, to explain the specific embodiment of the unconventional device shown in the attached drawings, the container body is formed by connecting an upper body 1 and a lower body 2 with an intermediate connecting portion 3, as shown in FIG. The upper end of the opening 4 formed at the top of the upper body 1 may be bent outward to form a curling portion 5, and the end of the curling portion 5 may be joined to the outer surface of the opening 4. In this joining, a joining part 6 is formed on the inner surface of the end part 5a, and the tip 7 is bent downward along the outside of the mouth part 4 to form a bent joining part.

At this time, a ring material 10 can be placed inside the inner cavity of the curling part 5 as shown in FIG. 3 if necessary.

Reference numeral 8 denotes a cap material such as a lip cap, and a backing layer 9 is formed on the inner surface, and the backing layer 9 joins to the upper edge portion of the curling portion 5, and the lower end portion covers the curling portion 5. 8a covers and tightens the outer surface of the tip 7, and extends downward to form a sealed state.

To explain the function of the device according to the present invention as described above, it is well known that the covering and sealing of the cap material 8 as described above is obtained by the lateral pressure on the lower end portion 8a as described above. By forming a joint 6 with the tip 5a and bending the tip 7 downward along the outside of the mouth 4, it is possible to avoid machining defects such as insufficient dimensions or require more precision machining than necessary when forming the curling portion. It is possible to secure a certain amount of curling height and a joint part that has the strength to withstand the unclamping pressure during sealing. Since it is in contact with the outside of the mouth part 4 with a certain surface, it acts as a pressure-resistant part and has a sufficient pressure-resistant effect against the side pressure, and if the side pressure P at the time of capping is the pressure resistance of the tip 7 due to this surface contact. Even if the tip 7, which is already bent downward, is slid a little along the outer surface of the mouth portion 4, a desirable sealing state can be formed accurately. Since the portion 5 is always obtained in a constant size and shape, from this point of view, a stable sealing relationship can be formed by sealing the cap material 8, and when forming the curled portion 5, it is possible to form a stable sealing relationship. Since there is no need to take special efforts to secure the container, it has the effect of making the container itself easier to manufacture, and is a highly effective device in terms of practical manufacturing.

In addition, the product according to the present invention can withstand a large tightening force during sealing by inserting something such as a wire rod as a ring material into the curling part when forming the curling part.

[Brief explanation of drawings]

The drawings show embodiments of the present invention, in which Fig. 1 is a side view of an example of a container that employs the sealing mechanism of the present invention, and Fig. 2 shows the curled portion and its covering with a capping material. It is a partial cross-sectional view showing a sealed state,
FIG. 3 is a partial sectional view showing another embodiment. In these drawings, 1 and 2 are parts forming the container body, 3 is a connecting part, 4 is a mouth part, 5 is a curling part,
Reference numeral 5a indicates the end thereof, 6 indicates the joint, 7 indicates the tip formed as a bent joint, 8 indicates the lip cap, and 9 indicates the backing layer.

Claims (1)

[Scope of utility model registration request] The upper end of the mouth formed in the container body is bent outward to form a curling part, and a cap material having a backing layer is covered on the curling part, and the circumferential side of the cap material is squeezed below the curling part to seal it. In the case where the inner surface of the end of the curling part is joined to the outside of the mouth part, the tip is bent downward from the joint part along the outside of the mouth part. A sealing mechanism for a pressure-resistant container characterized by a joint.