JPS6244936Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to an opening/closing device for containers such as cans, boxes, and bottles.

Conventionally, the above container opening/closing device has the following problems. Although illustration is omitted, for example, if a food such as ketchup is filled into a container such as a bottle, a synthetic resin lid is fitted to the container, and the container is left in a store for a long period of time, the synthetic resin The lid generally has gas permeability, allowing air to pass through, and as a result, the ketchup etc. are oxidized and discolored by the action of oxygen in the air, resulting in a significant decrease in commercial value.

Furthermore, even if an organic solvent such as thinner is stored in a container using a similar lid, the thinner or the like will pass through the lid and leak into the air due to the gas permeability of the lid.

In such a case, the above problem can be solved by storing the above-mentioned ketchup or thinner in a metal can, etc., but if you do so, you will have to make a hole with a canker or the like before using it. This is troublesome, and it is difficult to cover the hole and to use the cover continuously.

This invention was made to solve the above problems, and its purpose is to prevent the passage of gas even better than before by installing it on containers such as cans, boxes, bottles, etc. can be released,
Another object of the present invention is to provide a container opening/closing device that allows the lid to be opened and closed continuously and easily thereafter.

To describe this invention with reference to figures showing embodiments, in FIGS. 1 to 5, a lid 4 is screwed onto a mounting portion 3 of a mouth portion 2 having a through hole 1 provided separately or integrally with the container. A metal plate having a synthetic resin layer on its surface is formed with a protrusion 5 extending downward from the inside of the lid body 4 into the through hole 1, and is attached to both the lower end of the protrusion 5 and the mouth 2. This is a container opening/closing device characterized by being provided with a tear-off sheet 6 made of a sheet.

In addition, 8 in the figure is a cylindrical seal, and a weakened part 9 such as a perforation or a thin wall shape that is easy to tear is formed in a part of the seal in the axial direction, and is provided in the mouth part 2 via a tear part 10. It is being The entire structure was made of synthetic resin, for example.

Next, the mouth portion 2 is provided with a mounting portion 3 having a thread 11. The lid body 4 is attached to the mounting part 3
It is screwed into the thread 11 by the thread 12 of the thread. Further, a protrusion 5 is formed downward from the inner surface of the top wall 13 of the lid body 4 so as to face in the direction of the passage 1. The protrusion 5 may be formed into a cylindrical shape with a bottom wall 5a as shown in FIG. It may be formed into a cylindrical shape, or it may be simply formed into a cylindrical shape without a bottom as shown in FIG.

As shown in FIG. 10, the lower end of this protrusion 5 forms a first tapered part 14 which becomes smaller in diameter toward the lower end, and the through hole 1 corresponding thereto also has a second tapered part 15 which becomes larger in diameter toward the upper end. It is preferable to form. Next, the attachment part 3 of the lid body 4 is attached to the first
As shown in the figure, it may also be formed as a spout,
Further, as shown in FIG. 6, it may also be formed to serve as a taper-shaped spout.

Next, the lid body 4 is shown in FIGS. 6, 7, and 10.
As shown in FIGS. 11 and 11, a radially outward protrusion 16 may be provided on the outer periphery and engaged with a small protrusion 17 having an undercut provided on the mouth 2. This will prevent the lid 4 from being illegally opened before the product reaches the consumer.

Regarding the tear-off sheet 6, it is a metal sheet such as an aluminum sheet, and is easily tearable and thin.In addition, it must be thin enough to be easily tearable and not permeable to gas. For example, other suitable metal sheets may be used.
A synthetic resin layer is formed on the surface of the metal sheet. As an example, the one shown in FIG. 9 uses an aluminum sheet 6a laminated with polyethylene 6b.

This opening/closing device may be provided at the mouth of the bottle as the container 18 by means of its fixing part 19 as shown in FIG. 7, or as shown in FIG. It may be provided on a resin can, etc.), or it may be provided on the inside of the can by adhesive or the like as shown in the figure, or it may be provided on the outside of the container 18 as shown in FIG.

20 indicates a synthetic resin sheet.

In addition, in all the illustrated examples, the mouth portion 2 is connected to the container 18.
Although it is formed separately from the container 18 and later attached to the container 18, the present invention is not limited to this, and the container 18 itself may have the opening 1 and the mounting portion 3 formed therein. To open this device,
For example, in the apparatus shown in FIG. 1, the seal 8 is first torn off as shown in FIG. 2, and then the lid 4 is held and rotated to release the screwing.

Then, the tear-off sheet 6 is torn between the mouth portion 2 and the projection 5, and the through hole 1 is opened as shown in FIG. As a result, the contents liquid etc. are taken out. Thereafter, the lid body 4 is used as a lid as usual.
In the figure, 21 is a cover, 22 and 24 are holes, 23 is a protrusion, and 25 is a groove.

As described above, according to the device of this invention, the metal sheet can prevent gas from passing through the lid, and it is extremely easy to open the lid for the first time, and it can be opened and closed normally thereafter. can do. In addition, as another effect, a metal sheet having a synthetic resin layer on its surface is difficult to tear as it is, but the lid body 4 to which this is attached is screwed onto the attachment part 3, and is generally screwed. Its characteristic is that it can do a large amount of work with a small amount of force, and it has a force gain in the axial direction.

Therefore, by rotating the lid body 4 and unscrewing it from the mounting part 3, it is possible to extremely easily tear off a metal sheet having a synthetic resin layer, which is difficult to tear with a small force.

Another effect is that when a container containing a liquid is held and a lid attached to the container is pulled upward, the liquid may be thrown out from the mouth due to the force of the lid. In particular, tearing a metal sheet having a synthetic resin layer on its surface requires force, so there is a strong possibility that this will occur.

However, in this invention, the metal sheet having a synthetic resin layer on its surface is torn by rotating in a near-horizontal direction, so that no sudden vertical force is applied to the liquid in the container. By this,
It is possible to eliminate the fear of liquid splashing out as described above.

[Brief explanation of the drawing]

Figures 1 to 5 show examples of this invention; Figure 1 is a sectional view of a container opening/closing device, Figure 2 is a perspective view of the device shown in Figure 1 with the seal section removed, and Figure 3 is a cross-sectional view of the container opening/closing device.
Figure 4 is a cross-sectional view of the device when it is opened, Figure 4 is a cross-sectional view of the lid when the device is opened, Figure 5 is a cross-sectional view of the opening, and Figure 6 is a container showing another embodiment of this invention. FIG. 7 is a cross-sectional view of the same device showing another embodiment, FIG. 8 is a cross-sectional view of the same device attached to a can,
Fig. 9 is a sectional view of the same device installed in a different state from Fig. 8, Fig. 10 is a view showing an example of the vicinity of the mouth of the device, and Fig. 11 is a diagram showing still another embodiment of this device. FIG. 12 is a half-sectional view of the mouth of the same device showing an example; FIG. 12 is a half-sectional view when a lid is attached to the mouth; FIG.
The figure is a view taken along the line A--A of the bottom of the protrusion in FIG. 12. 1... Through hole, 2... Mouth part, 3... Mounting part, 4...
...Lid body, 5...Protrusion, 6...Tear-off sheet.

Claims (1)

[Scope of utility model registration request] A lid body 4 is screwed onto a fitting part 3 of a mouth part 2 having a through hole 1 provided separately or integrally with the container, and a projection 5 extends downward from inside the lid body 4 into the through hole 1. , and the lower end of the protrusion 5 and the mouth 2
A container opening/closing device characterized in that a tear-off sheet 6 made of a metal sheet having a synthetic resin layer on its surface is attached to both of the containers.