JP6418598B2 - Bottle cap - Google Patents

Description

  The present invention relates to a stopper attached to the mouth of a bottle filled with sake or the like.

In a general sake production line, a bottle is heated to around 65 ° C. for sterilization.
On the other hand, when hot filling similar to the above is performed on high-grade liquor, the aroma components are lost. I have to.

  If the bottle mouth is completely plugged in the cup or pass riser, the internal pressure of the bottle increases due to heating, and the bottle may be damaged. For example, in Patent Document 1, after a liquid such as a beverage is filled in a container, a temporary lid is mounted by a temporary lid mounting means, and heat treatment is performed by sprinkling warm water from a watering nozzle, and then the temporary lid removing means. The contents of mounting the product lid by the product lid mounting means after the temporary lid is removed by the above are disclosed.

As described above, performing the temporary stopper and the main stopper is troublesome in terms of work, which is disadvantageous in terms of cost. Therefore, Patent Document 2 discloses a structure in which the internal pressure can be released with one plug and can be used as the main plug.
This Patent Document 2 discloses a resin stopper composed of an inner cylinder that is inserted inside a container (bottle) mouth and an outer cylinder that covers the outside of the container mouth. Specifically, the outer cylinder has a cutout portion that is cut off and removed from the stopper, and a locking portion that locks into the engaging portion of the container mouth portion, and a plurality of outer cylinders are provided at intervals in the circumferential direction. And a remaining portion that remains without being cut off, an outer annular projection and a lower annular projection are formed on the outer peripheral portion of the inner cylinder, and a lower annular projection is formed with a notch that communicates the inside and outside of the container, A structure is disclosed in which the pressure in the container is released through the notch.

JP 2014-008963 A JP 2009-166896 A

As disclosed in Patent Document 1, when a hot water bottle or a pass riser is used, a temporary stopper that releases pressure is applied, and the mouth of the bottle is soiled with carbon dioxide bubbles or the like by the hot water cup or the pass riser. Since this plug is attached after cleaning it, the work process is cumbersome and disadvantageous in terms of cost.

  On the other hand, Patent Document 2 does not refer to plugging in two stages, and aims to release the internal pressure of the bottle when plugging in one stage and to release the internal pressure after opening. However, it is also possible to apply to the case of plugging in two stages.

  However, in the structure disclosed in Patent Document 2, it is conceivable that the cross-sectional area of the notch portion is insufficient in order to cope with a case where the internal pressure of the bottle rapidly increases due to heat treatment or the like. On the other hand, if the cross-sectional area of the notch is increased to cope with a sudden pressure increase, the notch is always in communication with the inside and outside of the bottle, so that bacteria and the like easily enter from the outside.

  Furthermore, the inner diameter of the bottle mouth has manufacturing errors depending on the individual bottles, and the roundness varies from bottle to bottle. Therefore, no matter how accurate the dimensions of the stopper, for example, the lower annular protrusion of Patent Document 1 and the size of the notch formed in the lower annular protrusion, the inner diameter dimension of the mouth of the bottle with which the lower annular protrusion abuts is not much. Since it is not accurate, it is not suitable as a structure for releasing the internal pressure of the bottle in the case of a hot water bath or a pass riser.

  In order to solve the above problems, a stopper for a bottle mouth according to the present invention comprises an inner stopper inserted into the inside of the mouth of the bottle and an outer crown covering the outer side of the mouth of the bottle, and the outer crown is opened. A cut-out portion that is sometimes cut off is formed, and a flange portion for the first-stage pressure plug is formed on the outer periphery of the inner plug, and an annular protrusion for the second-stage pressure plug is formed at a position axially higher than the flange portion. Is thin and has an outer diameter larger than the inner diameter of the mouth, and when the inner stopper is inserted into the inside of the mouth of the bottle, the outer peripheral end of the flange is positioned higher than the base end on the inner side of the mouth of the bottle. The bottle is pressed to maintain airtightness, and when the internal pressure of the bottle becomes higher than a predetermined pressure, the bottle is deformed to communicate with the inside and outside of the bottle to release the internal pressure of the bottle.

The inner plug and the outer crown are made of resin such as polypropylene, and the outer diameter of the inner plug is preferably 1.5 to 2.5 mm smaller than the inner diameter of the mouth of the bottle, and the outer diameter of the flange portion. Is preferably 0.15 to 0.25 mm larger than the inner diameter of the mouth of the bottle, and the thickness of the flange is preferably 0.3 to 0.4 mm.
The above dimensions are just examples, and the present invention is not limited to the above numerical values.

According to the stopper for a bottle mouth according to the present invention, when the internal pressure of the bottle becomes high during a cup or pass riser, the internal pressure can be released without pushing up the stopper. In particular, even when the internal pressure suddenly increases, the amount of deformation of the flange portion increases, so that it can be dealt with reliably.

Further, in the case of the bottle mouth stopper according to the present invention, when the external pressure becomes higher than the internal pressure of the bottle, the outer end of the flange portion is pressed against the inner peripheral surface of the bottle mouth, and the internal pressure is high. Unlike the case, the outer end portion of the flange portion is not separated from the inner peripheral surface of the mouth portion, so that there is no possibility that external bacteria enter the bottle.

Furthermore, by setting the outer diameter of the flange portion to be about 0.15 to 0.25 mm larger than the inner diameter size of the mouth of the bottle, the bottle whose roundness of the mouth of the bottle is somewhat insufficient Even so, dimensional errors can be absorbed.

Sectional drawing of the state before mounting | wearing with the stopper which concerns on this invention in the opening part of a bottle. Sectional drawing which shows the state of the 1 step | paragraph pressure stopper of the stopper which concerns on this invention. (A) is the figure explaining the state before releasing the internal pressure of a bottle, (B) is the figure explaining the state which is releasing the internal pressure of a bottle. Sectional drawing which shows the state of the two-stage pressure stopper of the stopper which concerns on this invention. Sectional drawing of the state which removed the cut-out part of the outer cylinder.

  The stopper according to the present invention is formed by integrating an outer crown 2 made of a resin such as polypropylene as well as an inner stopper 1 made of a resin such as polypropylene.

The outer crown 2 is formed with a cutout portion 3 that is cut off when the cap is opened. An annular projection 6 is formed on the inner peripheral surface of the cutout portion 3 to be engaged with an annular recess 5 formed on the outer peripheral surface of the mouth portion of the bottle 4 when the stopper is attached. The annular protrusion 6 is formed with an opening 6a having a width of 2 mm and an upper and lower height of about 0.6 mm communicating with each other in the thickness direction.

The cutout part 3 grips the gripping part 7 on which the fingertip can be applied, and peels it along the circumferential direction, thereby removing the cutout part 3 from the thin part 8 formed at the boundary with the upper part of the outer crown 2. Can be cut out. This state is shown in FIG.

The inner plug 1 has a cylindrical portion 10 that is inserted into the mouth portion of the bottle 4. The outer diameter dimension of the cylindrical portion 10 is set to be 1.5 to 2.5 mm smaller than the inner diameter dimension of the mouth portion of the bottle 4 so that the inner plug 1 can be smoothly inserted into the mouth portion.

A flange portion 11 for a first-stage pressure stopper and an annular protrusion 12 for a second-stage pressure stopper located above the flange portion 11 are formed on the outer periphery of the cylindrical portion 10.

The flange portion 11 is a one-stage pressure stopper in the case of a hot water bath or a pass riser, that is, for releasing the pressure to the outside when the internal pressure of the bottle 4 is increased to some extent by heating.

In the embodiment, the outer diameter of the flange 11 is set to be 0.15 to 0.25 mm larger than the inner diameter of the bottle mouth, and the thickness of the flange 11 is set to 0.3 to 0.4 mm.

As a result, as shown in FIG. 2 and FIG. 3 (A), the outer end of the flange portion 11 is in contact with the mouth portion in order to insert the inner stopper 1 into the mouth portion of the bottle 4 from above at the time of the first stage stopper. With the resistance, the outer end of the flange portion 11 is in close contact with the inner surface of the mouth portion in a state where the outer end is positioned above the base end portion.

In this close state, even if the external pressure becomes higher than the internal pressure of the bottle 4, the outer end of the flange portion 11 is further pressed against the inner periphery of the mouth of the bottle 4.

Further, when the internal pressure of the bottle 4 is raised by a hot water bottle or the like, as shown in FIG. 3B, a part of the circumferential direction of the flange portion 11 rises upward to form a passage. The internal pressure (air) of the bottle 4 is released. The released internal pressure is determined by the gap formed between the annular protrusion 12 and the upper end of the mouth of the bottle 4, the upper end surface of the mouth of the bottle 4, the outer peripheral surface of the inner stopper 1, and the inner surface of the outer crown 2. Released into the space surrounded by

The gas released into the space is discharged to the outside through an opening 6 a formed in the annular protrusion 6. Further, when bubbles of contents containing carbon dioxide gas rarely leak into the space, they are also discharged to the outside through the opening 6a and do not flow down the bottle mouth, so that they are not easily contaminated. .
If the contents leak from the opening 6a, the portion of the opening 6a is washed with a shower or the like after the heat sterilization and before the stopper (two-stage pressure stopper), and then dried by blowing air.

The annular protrusion 12 is a protrusion for preventing the contents from leaking even when the bottle 4 falls down. In a two-stage pressure stopper, a strong pressure of about 150 kg is applied to press the stopper into the mouth of the bottle 4. In the cup or the pass riser, the annular protrusion 12 is soft and deforms and strongly presses against the inner surface of the mouth of the bottle 4 to maintain an airtight and liquid tight state. As shown in FIG. 4, the upper end R portion on the inner side of the annular protrusion 6 is strongly locked to the upper end R portion on the outer side of the annular recess 5 by the two-stage pressure stopper, and does not come off.

Here, it is preferable that the outer diameter of the annular protrusion 12 is about 0.5 mm larger than the inner diameter of the mouth of the bottle 4. Unlike the flange portion 11, the annular protrusion 12 is not intended to relieve internal pressure, and therefore has a shape that is not easily deformed compared to the flange portion 11, that is, a cross-sectional shape close to a semicircle.

Further, a ridge 13 directed downward is formed on the lower surface of the outer peripheral portion of the inner plug 1. The protrusion 13 has an inclined lower end, and is deformed so as to abut against the mouth of the bottle 4 when the two-stage pressure stopper shown in FIG. By deforming in this way, even if the contents leak from the mouth part, the protrusions are in pressure contact with the mouth part of the bottle, so that leakage of the contents can be effectively prevented.

The stopper for a bottle mouth according to the present invention is not limited to a bottle filled with sake, but can also be applied to a bottle filled with soy sauce or juice.

DESCRIPTION OF SYMBOLS 1 ... Inner plug, 2 ... Outer crown, 3 ... Cut-out part, 4 ... Bottle, 5 ... Annular recessed part, 6 ... Annular protrusion, 6a ... Opening, 7 ... Holding part, 8 ... Thin part, 10 ... Tube part, 11 ... Flange part, 12 ... annular projection, 13 ... projection.

Claims (3)

A stopper for a bottle mouth comprising an inner stopper inserted into the inside of the mouth of the bottle and an outer crown covering the outer side of the mouth of the bottle, wherein the outer crown is formed with a cut-out portion to be cut off when opened. A flange portion for the first-stage pressure plug is formed on the outer periphery of the stopper, and an annular protrusion for the second-stage pressure plug is formed at a position axially higher than the flange portion. The flange portion is thin and has an outer diameter of the mouth portion. When the inner stopper is inserted into the inside of the mouth of the bottle, the outer peripheral end of the flange is pressed against the inner side of the mouth of the bottle at a position higher than the base end to maintain airtightness. When the internal pressure becomes higher than a predetermined pressure, it deforms and communicates inside and outside the bottle to release the internal pressure of the bottle, and a protrusion is formed on the lower surface of the outer peripheral portion of the inner plug. the lower end face at the lower end in contact with the mouth of the bottle during the two-stage圧栓are inclined surfaces so as to spread outwardly, this projection 2-stage stopper for bottle mouth the contents leaking from the mouth portion, characterized in that to prevent the leaking out during圧栓Ri.   The stopper for a bottle mouth according to claim 1, wherein the inner stopper and the outer crown are made of resin such as polypropylene, and the outer diameter of the inner stopper is 1.5 to 2 than the inner diameter of the mouth of the bottle. 0.5 mm smaller, the outer diameter of the flange is 0.15 to 0.25 mm larger than the inner diameter of the bottle mouth, and the thickness of the flange is 0.3 to 0.4 mm. A stopper for the bottle mouth. The stopper for a bottle mouth according to claim 1 or 2, wherein the inner surface of the cutout portion of the outer crown is annularly engaged with an annular recess formed on the outer peripheral surface of the mouth portion of the bottle at the time of one-stage compression stoppering. A stopper for a bottle mouth, characterized in that a protrusion is provided and an opening that communicates the inside and the outside is formed in the thickness direction of the annular protrusion.