JP2578040Y2 - Container stopper - Google Patents

Description

[Detailed description of the invention]

[0001] The present invention relates to a stopper for a container, such as a bottle, a carton, and a can, which is used by being attached to the mouth of the container.

[Prior art]

The inventor of the present invention devised and applied for and disclosed a new bottle opening / closing device to be used by being attached to a bottle mouth. (Jitsuhei 1-442525). Since this invention is an improvement of the above-described invention, the disclosed switching device will be described first. In FIG. 6, a is a lid,
It is formed of polyethylene resin, and is brought into pressure contact with the mouth e of the bottle d from outside and inside by the outer cylinder b and the middle cylinder c, respectively. f denotes a blocking wall for blocking the passage of liquid, g denotes an endless fissure, h denotes a tearing member such as a pull ring, i denotes a injection cylinder, and j denotes an outer lid. K is a polypropylene cover provided on the outer circumference of the outer cylinder b.

[0003] The disclosed opening and closing device configured as described above, when filling the bottle d with, for example, sake, juice, etc.,
Such a liquid is filled by heating to stop the yeast activity or to sterilize. In such a case, the heat of the heated liquid reaches the lid a through the mouth e of the bottle d and reduces the sealing force of the lid a. This phenomenon is because the polyethylene resin softens at a relatively low temperature (for example, about 80 ° C.), and the softening reduces the elasticity of the pressure contact and lowers the sealing force.

However, in this case, a cover k made of a polypropylene resin is provided on the outer periphery of the outer cylinder b, and the softening point of the polypropylene resin is high.
(120 ° C.) Therefore, the above-mentioned decrease in elasticity is supplemented by the above-mentioned cover k which is not affected by the heat, and the decrease in sealing force is small as a whole and can be made to a level that causes almost no problem in practical use. is there. To describe the above effect in more detail, the following sealing test was performed using the bottle closing device shown in FIG. This test is first 3
Use a 60 ml bottle and fill it with 95 ° C hot water. In this case, there should be some space between the upper surface of the hot water and the upper end of the bottle mouth. Then, the conventional bottle lid was first stoppered, left at room temperature of 20 ° C. for one week, and the degree of vacuum in the space was measured. Since the space has a negative pressure due to a volume decrease accompanying cooling of the hot water, the degree of the negative pressure was measured by a vacuum measuring device (manufactured by Okano Seisakusho Co., Ltd.). Next, a similar test was performed using the bottle opening and closing device of the present invention under the same conditions. The results of these tests are shown in the following table.

[Table 1]

The units cm and Hg in Table 1 indicate units of the degree of vacuum. As is clear from the experiments by Toricelli, the maximum value is 76 cm and Hg, and the closer the value, the higher the degree of vacuum. Therefore, the value indicates the degree of sealing, and if the value becomes 0, it indicates that there is no sealing effect. As described above, the switchgear of the disclosed invention has shown excellent effects.

[Problems to be solved by the invention]

However, it has been found that the disclosed switchgear has the following disadvantages. That is, the cover k is made of polypropylene as described above, and has much higher hardness than polyethylene resin or the like. In general, bottle covers and the like are particularly used in homes, etc., and most of the bottle covers and the like attached to the bottle mouth are formed of polyethylene resin, and the polyethylene resin is generally soft. It feels like a soft bottle lid. For this reason, the cover k made of the polypropylene resin is used.
Is different from the usual soft feeling and gives the consumer a hard feeling different from the usual soft feeling. The present invention has been made to solve such a problem, and its purpose is to avoid a hard feel when handling the disclosed switchgear by a consumer or the like, and to similarly contain a heated liquid. It is an object of the present invention to provide a container plug which can suppress a reduction in sealing force to a degree that does not hinder practical use even when used in a container. It is another object of the present invention to provide a stopper for a container having a higher sealing force than a conventional one even when used for a container containing a liquid at room temperature.

[Means for Solving the Problems]

The invention which achieves the above object is described as follows. The synthetic resin plug body 5 having the cylindrical portion 4 pressed against the inner peripheral surface 3 of the mouth portion 2 of the container 1 has water on the inner surface 6 of the cylindrical portion 4. A concentrically provided inner cylinder 7 made of polypropylene resin and having a softening point higher than the boiling point of the container. The stopper 2 is a stopper for the container formed of polyethylene resin. Further, the hardness of the synthetic resin forming the plug 5 on the inner surface 6 of the cylindrical portion 4 of the synthetic resin plug 5 having the cylindrical portion 4 pressed against the inner peripheral surface 3 of the mouth 2 of the container 1 is determined. A container stopper provided with an inner cylinder 7 made of a synthetic resin having a high hardness.

[Action]

[0008] A user such as a consumer holds the stopper to open the mouth of the container. In this case, unlike the disclosed device, the polypropylene inner tube 6 is provided inside the tube portion 4 and does not touch the hand, so that it has a hard and different feel different from conventional caps. In addition, the decrease in the sealing force of the stopper when the heated liquid is stored in the container can be replenished by the inner cylinder, and can be suppressed to a level that does not hinder practical use. Moreover, since polypropylene is generally harder than polyethylene or the like, it has high rigidity and can resist deformation at the inside of the cylindrical portion 4 or the inside of the cylindrical portion 4 made of polyethylene. Even if it is used for the container 1 accommodated, the sealing force can be increased.

【Example】

1 to 3, reference numeral 1 denotes a container, a bottle is shown as an example, and reference numeral 2 denotes a mouth. 3 is the same mouth 2
Reference numeral 4 denotes a cylindrical portion of the plug 5 which is pressed against the inner peripheral surface 3 of the mouth portion 2. Reference numeral 7 denotes an inner cylinder provided on the inner surface 6 of the cylindrical portion 4 and having a softening point higher than the boiling point of water and formed of a polypropylene resin. The inner cylinder 7 is formed of a resin having a higher hardness than the plug 5. The plug 5
In the embodiment shown in FIGS. 1 to 3, is formed as an inner plug shape as an example, and has an outer cylinder 9. Reference numeral 10 denotes a blocking wall that blocks the flow of the liquid, and has an endless fissure 11 and a tearing member 12.

Reference numeral 13 denotes a injection cylinder, and 14 denotes an outer lid. The outer lid 14 may be screwed 15 to the stopper 5 as shown in FIG. 1, or may be screwed to the container 1 as shown in FIG. It may be worn 16. In FIG. 3, the inner cylinder 7 extends over most of the plug body 5 in the vertical direction. As shown in FIGS. 4 and 5, the inner cylinder 7 may be formed so as to bite into the inner surface 6 of the cylinder portion 4. Such a form is formed by insert molding. When the plug 5 shown in FIGS. 1 to 5 is grasped from the outside, a soft feel of, for example, polyethylene (the plug is generally made of polyethylene) can be obtained. When the plug 5 is pressed into the inside of the mouth portion 2 of the container 1, the inner cylinder 7 receives a compressive force, but has a high pressure resistance because it is a cylindrical body.

When the fissure 11 is cut using the tearing member 12, the inner cylinder 7 is hard and provided in a core shape, so that there is little deformation as a whole. Therefore, the fissure 11 can be easily torn. it can. The inner cylinder 7 may be provided inside the cylinder portion 4 by insert molding, or may be provided by other means such as adhesion or separation. Alternatively, the diameter may be slightly larger than the inner diameter of the cylindrical portion 4 in advance, and this may be press fitted. It is needless to say that the outer diameter of the cylindrical portion 4 is slightly larger than the inner peripheral surface 3 of the mouth portion 2 of the container 1. Although not shown in the drawings, the stopper of the container of the present invention is not limited to the inner stopper as shown in the figure, but may be a simple stopper, that is, a stopper consisting of a cylindrical body and a substantially circular top on the top. Of course, it does not matter.

[Effect of the invention]

The present invention is constructed as described above, and the inner cylinder 7 made of polypropylene is provided on the inner surface of the cylindrical portion 4 which is pressed against the inner peripheral surface 3 of the mouth portion 2 of the container 1 so that consumers and the like are provided. Although the conventional caps have a soft feel when handled by the user, the conventional caps do not give a hard feel of a different kind of hardness as in the disclosed device. Moreover, alcoholic beverages, upon receiving the heated liquid, such as juice containers 1, decreased elasticity of the tubular portion 4 of the plug body 5 by the heat, that the sealing force is reduced, the boiling point of water to the inside than
Provision of a polypropylene resin inner cylinder 7 with a high softening point
As a result, it can be suppressed to a very small level that does not hinder practical use. Further, the cover K provided on the outer periphery of the outer cylinder b of the lid a shown in the conventional example is required to have a tensile strength since it is expanded in the circumferential direction when the lid a is attached to the mouth e of the bottle d. On the other hand, the inner cylinder 7 of the present invention is
Since the inner cylinder 7 is provided on the inner surface 6, when the stopper is attached to the container 1, the inner cylinder 7 is compressed in the circumferential direction, so that a compressive strength is required. In this case, the synthetic resin generally has a compressive strength much larger than a tensile strength. Therefore, the closure of the present invention can greatly enhance the sealing force as compared with the conventional switchgear . And it's also
However, the inner cylinder 7 is provided on the inner surface of the cylinder 4.
Therefore, provided on the outer periphery of the outer cylinder b as in the conventional example
Unlike, because the diameter is formed to be very small,
The material used can be reduced to a minimum. Tearing member 12
In order to tear the fissure 11 by pulling, the stopper is not distorted because the rigid polypropylene inner cylinder 7 is provided inside the cylindrical part 4, and hence the fissure 11 is easily torn because the dispersion of the force is small. Can be.

[Brief description of the drawings]

FIG. 1 is a half sectional view showing an embodiment of the present invention, in which a stopper of a container is attached to the container.

FIG. 2 is a view showing a second embodiment of the present invention and corresponding to FIG. 1;

FIG. 3 is a view showing a third embodiment of the present invention and corresponding to FIG. 1;

FIG. 4 is a partial cross-sectional view of a container stopper according to a fourth embodiment of the present invention.

FIG. 5 is a view showing a fifth embodiment of the present invention and corresponding to FIG. 4;

FIG. 6 is a half sectional view of a container opening / closing device disclosed by the inventor of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Container 2 Mouth part 3 Inner peripheral surface 4 Tube part 5 Plug body 6 Inner surface 7 Inner cylinder

Claims (3)

(57) [Scope of request for utility model registration] 1. A synthetic resin plug body 5 having a cylindrical portion 4 pressed against an inner peripheral surface 3 of a mouth portion 2 of a container 1, wherein the inner surface 6 of the cylindrical portion 4 has a softening point higher than a boiling point of water. A container stopper comprising an inner cylinder 7 formed concentrically and formed in a concentric manner. 2. The stopper according to claim 1, wherein the stopper 2 is formed of a polyethylene resin. 3. The inner surface 6 of the cylindrical portion 4 of the synthetic resin plug 5 having the cylindrical portion 4 pressed against the inner peripheral surface 3 of the mouth portion 2 of the container 1.
A container plug provided with an inner cylinder 7 made of a synthetic resin having a hardness higher than the hardness of the synthetic resin forming the plug 5.