JP5073405B2 - Hinge cap - Google Patents

Description

  The present invention relates to a hinge cap, and more particularly to a hinge cap that prevents the upper lid from being opened due to an increase in air pressure in the upper lid caused by heat-sterilized content liquid filled in a container.

In a hinge cap filled with heated content liquid for sterilization, after filling the content liquid and plugging the hinge cap, sterilizing the inside of the container, then washing and cooling with a hot water shower from the outside of the container, It has been implemented conventionally.
Further, in order to prevent the upper lid from opening due to an increase in air pressure in the cap due to the heat treatment for sterilization, the main protrusion is formed on the protrusion of the upper lid that engages with the protrusion for engagement of the cap body. It is also conventionally known to provide an auxiliary protrusion and to double the locking mechanism to prevent the upper lid from being opened (see, for example, Patent Document 1).

In order to prevent the upper lid from opening, when the internal pressure in the cap rises, an air flow path is formed between the upper lid and the cap body, allowing the air in the cap to escape outside the container, and A cap that prevents an increase in internal pressure has also been known (see, for example, Patent Document 1).
JP-A-11-35061 JP 2000-272648 A

  However, the conventional hinge cap described in Patent Document 1 is designed to prevent the upper lid from being further lifted by the engagement of the auxiliary projections and prevent the upper lid from being opened. In this case, the auxiliary protrusion must be moved over the protrusion for engaging the cap body, and the lid is opened stepwise by the user, but eventually the auxiliary protrusion is raised from the engagement protrusion. There was a problem that force was required and the opening force could not be reduced.

  Further, in the hinge cap described in Patent Document 2, since the air flow passage is formed or closed by the air pressure in the cap, when the air pressure in the cap is high and the air flow passage is formed, When cooling with a hot water shower from the outside of the container, the air pressure in the cap decreases, and there is a problem that the hot water is sucked into the cap together with the air before the air passage is closed.

  The present invention solves the above problems and prevents the opening of the upper lid due to the pressure increase in the upper lid caused by heating and filling, so that the air in the upper lid is discharged when the pressure rises, and the air is circulated according to the pressure drop. It is an object of the present invention to provide a hinge cap that stops and immediately seals the inside of the upper lid.

  In order to solve the above-described problems, the present invention provides a hinge cap that is attached to a mouth tube portion of a container as a hinge cap, and in which the cap body is fitted to the container mouth tube portion. An engagement cylinder part and an extraction cylinder are provided, a flat engagement surface is provided on the upper surface of the upper part of the engagement cylinder part, and a lid engagement part provided with a bulging part is provided on the outer periphery. The upper lid includes a top wall, an outer peripheral wall, and a sealing ring. An engagement surface that abuts an upper surface of the engagement surface of the cap engagement portion of the cap body and an expansion of the lid engagement portion are provided on the inner periphery of the lower end of the outer peripheral wall. An arrangement is employed in which an engaging protrusion is provided to engage with the lower surface of the protruding portion, and a convex rib is provided on the top surface of the engaging protrusion.

As an example of the dispensing cylinder, a configuration is adopted in which a concave groove extending to the vicinity of the lower end of the sealing ring when the lid is closed is formed on the inner peripheral surface of the dispensing cylinder.
The concave grooves and convex ribs are provided on the opposite side of the hinge, with the concave grooves provided on the dispensing cylinder and the convex ribs provided on the top surface of the engaging projection on the outer peripheral wall of the upper lid. The configuration is adopted.

Since the concave groove is engraved on the inner periphery of the extraction cylinder of the cap body, and the convex rib is projected on the engagement protrusion top surface that engages the bulging part of the lid engaging part of the cap body of the lid, When the pressure in the upper lid rises, the upper lid is lifted slightly, and air is discharged through the concave grooves and the convex ribs.
When the pressure drops, the engaging protrusion is brought into contact with the lower side surface of the bulging portion, and the upper lid is quickly closed.
Further, when the concave groove and the convex rib are arranged on the opposite side of the hinge from the extraction cylinder and the engaging projection, the upper lid can be opened and closed according to the pressure quickly and efficiently.

  Next, the hinge cap of this invention is demonstrated with reference to drawings.

1 and 2, A is a cap main body to be plugged into the container, and B is an upper lid integrally formed with the cap main body A via a hinge C.
The container includes a mouth tube portion 1, a body portion 2, and a bottom portion, and an engagement protrusion 3 is provided on the outer periphery of the mouth tube portion 1.

  As shown in FIGS. 1 to 3, the cap main body A includes an engagement tube portion 5, an extraction tube 6 connected to the inside of the engagement tube portion 5, and a constant interval on the outer periphery of the engagement tube portion 5. And an outer peripheral cylindrical portion 7 in which a hinge C is continuously provided at a predetermined position on the outer periphery of the upper end.

The engagement cylinder portion 5 includes a ring-shaped upper wall 8, an inner cylinder 9 suspended from the inner periphery of the upper wall 8, an outer cylinder 10 suspended from the outer periphery of the upper wall 8, and the upper wall 8. And a lid engaging portion 11 that engages with the upper lid B.
On the inner periphery of the outer cylinder 10 is provided an engagement protrusion 12 that engages with the engagement protrusion 3 of the mouth tube portion 1 of the container. The cap body A is attached to the mouth tube portion 1 of the container so that the mouth tube portion 1 of the container is sandwiched between the outer periphery and the inner periphery of the outer tube 10.

An annular bottom wall 13 is continuously provided inward from the lower end of the inner cylinder 9, and an extraction cylinder 6 is erected on the inner edge of the annular bottom wall 13.
The pouring tube 6 is provided with a bottom wall 14, and the bottom wall 14 is provided with a removal portion 16 that is partitioned by a thin weakened portion 15 for opening the spout, and the removal portion 16, a pull ring 17 is erected.
On the opposite side of the inner peripheral surface of the dispensing cylinder 6 from the hinge C, a concave groove 18 is engraved extending from the upper end to a position slightly above the lower end of the sealing ring when closing, which will be described later.

  The outer periphery of the lower end of the outer cylinder 10 and the inner periphery of the lower end of the outer cylinder part 7 are connected pieces 19 provided on the opposite side of the hinge C of the outer cylinder part 7 and a plurality of breakable weakening pieces arranged at intervals. 20 are connected to each other.

  As shown in FIGS. 1 and 3, a flat engagement surface 21 is formed on the upper surface of the lid engaging portion 11, a reduced diameter portion 22 having a diameter reduced from the outer periphery of the outer cylinder 10, and an upper end thereof. A bulging portion 23 having a diameter larger than that of the reduced diameter portion 22 is formed in the portion, and a lower side surface of the bulging portion 23 is an engagement surface 23a.

The upper lid B includes a top wall 30 and an outer peripheral wall 31 suspended from the periphery of the top wall 30, and is inserted into the inner periphery of the pouring cylinder 6 of the cap body A on the lower surface of the top wall 30. A sealing ring 32 is suspended.
The inner peripheral lower end of the outer peripheral wall 31 is enlarged in diameter, and an engaging portion 33 that engages with the lid engaging portion 11 of the engaging cylinder portion 5 of the cap main body A is provided. Are provided, and a knob 34 projects from the opposite side of the hinge.

As shown in FIG. 3, the engaging portion 33 abuts and engages with the engaging surface 21 of the lid engaging portion 11 of the cap main body A when the cap is closed, and the outer periphery of the lid engaging portion 11. And a side inner surface 33b that engages with.
At the lower end of the side inner surface 33b, an engagement protrusion 35 that engages with the bulging portion 23 of the lid engagement portion 11 of the cap body A is provided.
As for the engagement protrusion 35, the upper peripheral surface becomes the engagement surface 35a engaged with the engagement surface 23a of the bulging part 23 of the lid | cover engagement part 11 of the cap main body A. As shown in FIG.
Convex ribs 36 project from the top surface of the engaging projection 35 opposite to the hinge.

Next, the effect of the hinge cap of a present Example is demonstrated.
By engaging the engaging portion 33 of the upper lid B with the lid engaging portion 11 of the cap body A and closing the upper lid B with respect to the cap body A, as shown in FIG. The air chamber a is formed outside the sealing tube 32 of the engaged cap body A and the upper lid B, and the air chamber b is formed inside.

The heated content liquid is filled in the container, and a closed hinge cap is plugged into the container mouth tube portion 1 from above.
As shown in FIGS. 1 and 3, the hinge cap before the stopper is engaged with the engagement protrusion 35 of the engagement portion 33 of the outer peripheral wall 31 of the upper lid B and the lid engagement of the engagement cylinder portion 5 of the cap body A. The air flow between the air chamber a and the outside of the hinge cap is blocked by the engagement of the bulging portion 23 of the portion 11 with the engagement surface 23a.

  At the time of tapping, a strong pressing force is applied from the upper part of the upper cover B of the hinge cap, and the upper cover B is pressed against the cap body A and descends.

After the stoppering, the inside of the container is sterilized by the heat-sterilized content liquid, and then a hot water shower is applied from the outside of the container and cooled.
At that time, due to the heat treatment, the air in the air chambers a and b expands and the internal pressure increases.

  As shown in FIGS. 4 and 5, the upper lid B is lifted by the increase in internal pressure, and the lower end 32 a of the sealing ring 32 rises from the lower end 18 a of the concave groove 18, so that air in the air chamber b flows in the concave groove 18. Enters the air chamber a.

  The air in the air chamber a is raised by the engaging portion 33 of the upper lid B, the top surface of the engaging projection 35 is engaged with the top surface of the bulging portion 23 of the lid engaging portion 11, and the upper lid B is engaged. Between the portion 33 and the engaging surface 21 on the upper surface of the lid engaging portion 11, the space between the convex rib 36 and the bulging portion 23 is discharged to the outside.

Next, when the air is discharged, the internal pressure in the upper lid is reduced, the upper surface of the engaging projection 35 is guided along the bulging portion 23, and the upper lid B is quickly restored to the original state and closed. The inside of the upper lid B is kept airtight.
Therefore, in the hinge cap of the present invention, the upper lid B is opened and closed by reacting promptly according to the internal pressure in the upper lid B, so that the upper lid B can be prevented from opening.

  Even if hot water shower or cooling water is applied after the upper lid B is closed, the inside of the upper lid B is kept in a tight state, so that the shower is not sucked into the cap together with air.

In the embodiment described above, the concave groove 18 on the inner periphery of the dispensing cylinder 6 and the convex rib 36 of the engaging projection 35 are provided on the peripheral surface on the opposite side of the hinge C, and the flow path is quickly opened according to the opening and closing of the hinge cap. Although the groove 18 can be opened and closed, it is sufficient that the groove 18 is covered by the lower end of the sealing ring 32 when the lid is closed.
About the convex rib 36, it may be located in the other side of the hinge C, a some convex rib may be juxtaposed, and a concave groove may be sufficient.

  In the present invention, in the hinge cap, the air in the upper lid is heated by the heated and filled content liquid, hot water shower, etc., and the internal air is discharged when the internal pressure rises. It is possible to prevent the lid from being opened, and it can be widely used as a hinge cap for containers of various liquids to be heated and filled.

It is a section elevation view of the present invention hinge cap. It is a bottom view of a hinge cap. It is an enlarged view of the principal part of a hinge cap. It is explanatory drawing of the hinge cap at the time of an upper cover floating. It is expansion explanatory drawing of the principal part of a hinge cap.

Explanation of symbols

A Cap body B Upper lid C Hinge a, b Air chamber 1 Mouth tube portion 2 Body portion 3 Engagement ridge 5 Engagement tube portion 6 Extraction tube 7 Outer tube portion 8 Upper wall 9 Inner tube 10 Outer tube 11 Cover engagement Part 12 Engagement ridge 13 Annular bottom wall 14 Bottom wall 15, 20 Weakening part 16 Removal part 17 Pull ring 18 Concave groove 18a Lower end 19 Connecting piece 21 Engagement surface 22 Reduced diameter part 23 Swelling part 23a Engagement surface 30 Top wall 31 outer peripheral wall 32 sealing ring 32a lower end 33 engaging portion 33a upper inner surface 33b side inner surface 34 knob 35 engaging protrusion 35a engaging surface 36 convex rib

Claims (3)

In the hinge cap that is attached to the mouth tube portion of the container and consists of a cap body and an upper lid,
The cap body includes an engaging tube portion and a dispensing tube that are fitted to the container mouth tube portion,
On the upper part of the engagement cylinder part, a flat engagement surface is provided on the upper surface, and on the outer periphery, a lid engagement part provided with a bulging part protrudes.
The upper lid includes a top wall, an outer peripheral wall, and a sealing ring,
An engagement surface that contacts the upper surface of the engagement surface of the lid engagement portion of the cap body and an engagement protrusion that engages the lower surface of the bulging portion of the lid engagement portion are provided on the inner periphery of the lower end of the outer peripheral wall. ,
A hinge cap characterized in that a convex rib is provided on the top surface of the engaging protrusion.   2. The hinge cap according to claim 1, wherein a concave groove extending to the vicinity of the lower end of the sealing ring when the lid is closed is formed on the inner peripheral surface of the dispensing cylinder.   The hinge cap according to claim 2, wherein a concave groove provided in the dispensing cylinder and a convex rib provided on the top surface of the engagement protrusion on the outer peripheral wall of the upper lid are provided on the opposite side of the hinge.

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