JP5255242B2 - Hinge cap - Google Patents

Description

  The present invention relates to a hinge cap, and more particularly to a hinge cap in which an upper lid is prevented from being opened due to an increase in pressure in the cap under high temperature conditions such as high temperature filling.

  A hinge cap comprising a cap body fitted and fixed to the container mouth portion and an upper lid hinged to the cap body so as to cover an opening formed in the cap body (for example, Patent Document 1) is provided on the top plate portion of the cap body. It is possible to take out the contents by removing the planned opening part formed by the weakened part that can be broken and forming the opening for pouring the contents. When the nozzle and the inner ring of the upper lid are in close contact with each other, liquid-tightness after forming the dispensing opening is secured (Patent Document 1).

Such a hinge cap is formed with the upper lid opened and then the upper lid is closed. At this time, the fitting contact between the dispensing nozzle and the inner ring is before the upper lid is completely closed. Therefore, air is confined in a positive pressure state in the cap body top plate portion formed with the dispensing nozzle and the planned opening portion partitioned by the dispensing nozzle and the top lid top surface. It will be.
On the other hand, in the hinge cap used for the contents to be filled at a high temperature, immediately after filling the contents heated to about 90 ° C., the top lid is fixed to the cap body and plugged into the container mouth, Further, a hot water shower at about 60 ° C. is then applied to clean and cool the container.
For this reason, since the compressed air in the cap inner space expands due to a high-temperature content liquid or hot water shower, the pressure in the cap inner space increases, and the upper lid may open.

  As a solution to this problem, the upper inner surface of the engaging portion of the outer cylindrical wall of the upper lid is pressed against the lid engaging surface of the cap engaging portion of the cap body by pressing from above when the hinge cap is plugged. Slide outward on the surface and slightly deform the outer cylinder wall of the upper lid outward to form an air flow path from the inside of the hinge cap to the outside. When the hinge cap is completely plugged in, the upper inner surface of the engaging portion of the outer cylinder wall of the upper lid is made to be in contact with the lid engaging surface of the cap engaging portion of the cap body by the restoring force of the outer cylinder wall of the upper lid. It has been proposed to slide inward on the surface, quickly close the air flow path from the inside of the hinge cap to the outside, and make the inside of the hinge cap slightly negative (Patent Document 2). .

JP 2001-287761 A JP 2007-99319 A

In the above prior art, since the air in the cap space escapes to the outside at the time of plugging, it is possible to prevent the opening of the upper lid due to high temperature filling, but the hinge cap was exposed to high temperature before the plugging. In some cases, it is difficult to prevent the upper lid from being opened, and it is difficult to reliably provide the plugging process with the upper lid closed.
Accordingly, an object of the present invention is to provide a hinge cap in which the upper lid is effectively prevented from being opened due to the high temperature filling of the contents.
Another object of the present invention is to effectively prevent the opening of the upper lid even when exposed to high temperatures in the hinge cap transportation / storage process, etc., and to maintain the closed state of the upper lid for the plugging process. It is to provide a hinge cap that can be used.

According to the present invention, the top plate portion and the skirt portion are formed, and at the center on the outer surface side of the top plate portion, the planned opening portion partitioned by the breakable weakening line is formed, and the weakening line is formed on the planned opening portion. A pull ring comprising a base part and a grip part for forming a pour opening by breaking, and a pour nozzle is formed at the central peripheral edge of the top plate part so as to surround the planned opening part. A cap body fitted and fixed to the container mouth, and a top wall and a peripheral wall hanging from the outer periphery of the top surface. After the opening is formed in close contact with the inner surface of the dispensing nozzle on the inner surface of the top surface. An upper ring formed with an inner ring that ensures liquid-tightness, and the upper lid is hinged to the cap body, and when closing the upper lid, the tip of the outer surface of the inner ring at a position symmetrical to the hinge is First of the inner surface of the dispensing nozzle In the hinge cap having a space from the touching position to the seal portion where the lower portion of the inner ring outer surface and the lower portion of the inner surface of the dispensing nozzle are in close contact with each other when the upper lid is closed. On the inner surface of the nozzle, there is formed a groove or convex portion extending in the vertical direction from the upper end of the seal portion beyond the position where the tip of the outer surface of the inner ring first contacts the inner surface of the dispensing nozzle. A featured hinge cap is provided.

In the hinge cap of the present invention, grooves or protrusions, and this formed at symmetrical positions of at least the hinge portion, it is preferred.

ADVANTAGE OF THE INVENTION According to this invention, even if the internal pressure of cap internal space rises by high temperature filling, a hot water shower, etc., the hinge cap by which the upper cover was effectively prevented from opening can be provided.
Further, in the hinge cap of the present invention, when the lid is closed (when the upper lid is first fixed to the cap body), it is possible to effectively release the air in the space inside the cap. Even when the container is exposed to a high temperature in a transport / storage process before plugging, the upper cover is not opened, and the closed state of the upper cover can be maintained in all processes from manufacturing to plugging.
Furthermore, the hinge cap of the present invention can effectively prevent the opening of the upper lid by simple processing and is excellent in moldability.

The hinge cap according to the present invention includes a top plate portion and a skirt portion, a pouring nozzle is formed at the center of the top plate portion, and the planned opening portion is defined by a weakening line that can be broken inside the pouring nozzle. A cap body fitted and fixed to the container mouth, and a peripheral wall hanging from the top surface and the outer peripheral edge of the top surface, and in close contact with the inner surface of the dispensing nozzle The upper lid is formed with an inner ring that secures liquid-tightness after the opening is formed, and has a basic structure in which the upper lid is hinged to the cap body.
In the present invention, in the hinge cap having such a basic structure, when the upper lid is closed, the inner ring, the inner surface of the dispensing nozzle and the outer surface of the inner ring are in close contact with each other in the closed state of the upper lid to form a seal portion. In addition, the liquid-tightness after the opening is formed is secured, and at least when the upper lid is closed, the inner ring outer surface tip is more than the portion that forms the seal portion from the position where it first contacts the dispensing nozzle inner surface. It is an important feature that a groove or a convex portion is formed on the upper inner surface of the dispensing nozzle, so that the outer ring tip of the inner ring moves in contact with the inner surface of the dispensing nozzle when the lid is closed. In this case, the space formed by the cap main body top plate portion in which the extraction nozzle and the planned opening portion defined by the extraction nozzle are formed and the top surface of the upper lid (hereinafter simply referred to as “capture”). The air flow path from the inner space of the cap is formed, and the air in the cap inner space becomes positive before the outer ring tip of the inner ring and the inner surface of the dispensing nozzle are in close contact with each other to form a seal portion. It is possible to efficiently release the air in the cap space to the outside so as not to be in a pressure state, and it is possible to effectively suppress the expansion of the air in the cap space due to high temperature filling or heat of the hot water shower, etc. As a result, it is possible to prevent the upper lid from opening.

The hinge cap of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a side sectional view showing an example of a hinge cap according to the present invention in a state in which an upper lid is opened (a state immediately after molding), and FIG. 2 is a process of closing the upper lid of the hinge cap shown in FIG. FIG. 3 is a side sectional view showing a state when the inner ring first contacts the dispensing nozzle, and FIG. 3 is a side sectional view showing a state in which the upper lid of the hinge cap shown in FIG. 1 is completely closed. 4 is a partially enlarged plan view of the top plate portion of the cap body.
5 to 7 are enlarged views of the dispensing nozzle and the inner ring when (A) the inner ring first contacts the dispensing nozzle and (B) the upper lid is completely closed. FIG. 5 shows a conventional hinge cap, and FIGS. 6 and 7 show an example of the hinge cap of the present invention.

  1 to 3, a cap body 1 fitted and fixed to a container mouth portion (not shown) includes a top plate portion 2 and a skirt portion 3 depending from the periphery of the top plate portion 2. The inner ring 4 is formed to be in close contact with the inner surface of the container mouth. In the center on the outer surface side of the top plate portion 2, an opening planned portion 6 partitioned by a score 5 is formed. A base portion 7 a for breaking the score 5 to form a dispensing opening in the planned opening portion 6 and A pull ring 7 including a gripping portion 7b is formed. Further, a pouring nozzle 8 is formed on the outer surface of the top plate portion 2 so as to surround the planned opening portion 6, and an annular engagement protrusion 9 for fitting and fixing the upper lid 20 on the outer peripheral side of the pouring nozzle 8. Is formed.

The upper lid 20 includes a top surface 21 and a peripheral wall 22 depending from the outer peripheral edge of the top surface 21, and an inner ring 23 that is in close contact with the dispensing nozzle 8 of the cap body 2 is formed on the inner surface of the top surface 21. ing. That is, in a state where the inner surface 8a of the dispensing nozzle 8 and the outer surface 23a of the inner ring 23 are completely closed (FIG. 3), the seal portion S is formed by closely contacting with each other at the lower portion. The liquid tightness of the hinge cap 1 after the opening is formed is ensured, and the cap inner space R is formed.
An annular engagement portion 24 that engages with the annular engagement protrusion 9 of the cap body described above is formed at the inner lower end of the circumferential wall 22. Further, the upper lid 20 is formed integrally with the cap body 1 by a hinge 30 at a position symmetrical to the dispensing direction of the cap body 1 (the arrow in FIG. 5), and the outer lower end of the circumferential wall 22 of the upper lid 20 is poured out. In the direction, a protrusion 25 for opening the upper lid is formed.

As apparent from FIG. 2, in the hinge cap of the present invention, when the upper lid 20 is closed, the tip of the outer surface 23a of the inner ring 23 is in contact with the inner surface 8a of the dispensing nozzle 8 so that the upper lid 20 is closed. As a result, the annular engagement portion 24 of the upper lid 20 and the annular engagement protrusion 9 of the cap body 1 are finally engaged to complete the closing, and the inner ring outer surface 23a and the dispensing nozzle inner surface 8a are completed. In close contact with each other to form a seal portion S (see FIGS. 5 to 7).
In the conventional hinge cap, as shown in FIG. 5, when the lid is closed, the outer surface tip 23 a of the inner ring 23 first comes into contact with the inner surface 8 a of the dispensing nozzle 8, and then a gap is formed while they are in close contact with each other. Since the inner ring 23 moves downward, the air in the cap inner space R may flow out to the outside when the inner ring outer surface tip 23a first contacts the inner surface 8a of the dispensing nozzle 8. Since the volume of the cap inner space decreases as the upper lid 20 moves downward, the air present in the cap inner space R is in a compressed state (positive pressure state).
As a result, as described above, the compressed air in the cap inner space R is expanded by the heat of the contents due to the high temperature filling or the heat by the hot water shower, and the annular engagement portion 24 and the annular engagement protrusion of the upper lid 20 and the cap body 1 are expanded. 9 is released and the upper lid 20 is opened.

  In the present invention, as shown in FIGS. 6 and 7, the position P1 of the inner surface 8a of the pouring nozzle 8 where the outer surface tip 23a of the inner ring 23 first contacts from the upper end of the seal portion S upward. A groove 10 (FIG. 6) extending in the vertical direction beyond or a convex portion 11 (FIG. 7) extending in the vertical direction is formed. Thus, in the process of closing the top cover 20, it is possible to form a flow path for air from the cap inner space R on the contact surface of the inner ring outer surface tip 23a and the dispensing nozzle inner surface 8a. It is possible to escape the air in the cap internal space before it is completely fixed to the cap body 1, and the air existing in the cap internal space is not compressed like the conventional hinge cap and is slightly in a negative pressure state. Even if the contents are subjected to high temperature filling and hot water shower, the air in the cap space does not expand excessively, and the upper lid 20 is effectively prevented from opening.

In the hinge cap of the present invention, the groove or convex portion formed on the inner surface of the dispensing nozzle is not limited to the embodiment formed in FIGS. 6 and 7, and the space inside the cap is in the middle of closing the upper lid. Various modifications are possible as long as a flow path for escaping air is formed.
For example, the longitudinally extending grooves or protrusions shown in FIGS. 6 and 7 are formed from the upper side of the position where the inner ring outer surface tip first contacts the dispensing nozzle inner surface, but first contact. If it is formed between the upper end of the seal portion in the closed state from the position, the object of the present invention can be achieved. Further, a plurality of these grooves or protrusions may be formed.
As shown in FIG. 4, the groove or projection is formed at a position symmetrical to the hinge (on the opposite side of the hinge). Since the upper lid closes with the hinge as an axis, the air in the cap is most efficiently used. However, the position is not limited to this position as long as the air in the cap space can be released while the upper lid is closed.
Further, in addition to the convex portion extending in the vertical direction as shown in FIG. 7, the convex portion may be formed with a plurality of hemispherical small projections, or formed on a rough surface on which a large number of minute projections are formed. Even so, the object of the present invention can be achieved.

  Further, the depth or size of the groove or convex portion can be appropriately determined depending on the cap diameter, the shape of the groove or convex portion to be formed, etc. For example, in the case of a hinge cap for a bottle diameter of 32 mm, FIG. In the case of the longitudinally extending groove shown, it is preferable that the width is 0.5 to 3 mm, the depth is 0.5 to 2 mm, and the corners are rounded and extend in the longitudinal direction shown in FIG. In the case of the protrusion, it is preferable that the width is 0.5 to 3 mm, the height is 0.5 to 2 mm, and the cross section in the lateral direction is substantially semicircular and substantially trapezoidal.

The hinge cap of the present invention is formed with the upper lid opened, and then subjected to processes such as storage, transport, and plugging with the upper lid closed. Therefore, in the hinge cap of the present invention, the air in the cap internal space has already been effectively released before being plugged into the container filled with the contents. The opening of the upper lid is effectively prevented not only when heating but also when stored and transported under high temperature conditions. Therefore, there is no entanglement or catching between the caps during storage and transportation, and the efficiency at the time of plugging is improved.
Furthermore, since it can be formed on the inner surface of the dispensing nozzle simultaneously with the molding of the cap or by simple post-processing, it is excellent in moldability and productivity.

  The hinge cap of the present invention can be formed by a conventionally known method such as injection molding or compression molding of a resin used for molding a conventional hinge cap such as polyethylene or polypropylene. As long as the hinge cap has the above-described basic configuration, various forms can be adopted. For example, as in the hinge cap shown in FIGS. 1 to 3, the cap is detached from the container mouth after use of the contents. In order to facilitate the above, it is possible to adopt a conventionally known hinge cap configuration such as forming a weakened portion in the cap main body skirt portion of the hinge portion.

An example of the hinge cap of this invention is a sectional side view which shows the state (state immediately after shaping | molding) that the upper cover opened. It is a figure which shows the side sectional view which shows a state when an inner ring first contacts the extraction nozzle in the process of closing the upper cover of the hinge cap shown in FIG. FIG. 2 is a side sectional view showing a state in which an upper lid of the hinge cap shown in FIG. 1 is completely closed. It is a partially expanded plan view of the top plate portion of the cap body. (A) of a conventional hinge cap shows a state in which the inner ring first contacts the dispensing nozzle, and (B) shows an enlarged view of the portion of the dispensing nozzle and inner ring in a state where the upper lid is completely closed. A partial expanded sectional view. (A) of an example of the hinge cap of the present invention is a state in which the inner ring first contacts the pouring nozzle, and (B) is an enlargement of the portion of the pouring nozzle and the inner ring in a state where the upper lid is completely closed. FIG. (A) of an example of the hinge cap of the present invention is a state in which the inner ring first contacts the pouring nozzle, and (B) is an enlargement of the portion of the pouring nozzle and the inner ring in a state where the upper lid is completely closed. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cap body, 2 Top plate part, 3 Skirt part, 4 Inner ring, 5 Score, 6 Planned opening part, 7 Pull ring, 8 Pouring nozzle, 9 Annular engagement protrusion, 10 groove,
11 convex portion, 20 top lid, 21 top surface, 22 circumferential wall, 23 inner ring,
24 annular engaging part, 25 protrusion part.

Claims (2)

It consists of a top plate part and a skirt part, and a planned opening part partitioned by a breakable weakening line is formed in the center on the outer surface side of the top plate part, and the weakening line is broken and poured out into the planned opening part A pull ring consisting of a base and a gripping part for forming an opening for forming is formed, and a fitting nozzle is formed on the peripheral edge of the center of the top plate so as to surround the planned opening. It consists of a fixed cap body, a top surface, and a peripheral wall that hangs from the outer periphery of the top surface. The inner surface of the top surface is in close contact with the inner surface of the dispensing nozzle to ensure liquid-tightness after the opening is formed. An upper lid formed with an inner ring that is hinged to the cap body,
When the upper lid is closed, the inner ring outer surface is closed when the upper lid is closed from the position where the tip of the outer surface of the inner ring at a position symmetrical to the hinge first contacts the inner surface of the dispensing nozzle. In the hinge cap having a space between the lower part and the sealing part where the lower part of the inner surface of the dispensing nozzle is in close contact,
On the inner surface of the dispensing nozzle, there is formed a groove or convex portion extending in the vertical direction from the upper end of the seal portion beyond the position where the tip of the outer surface of the inner ring first contacts the inner surface of the dispensing nozzle. A hinge cap characterized by that.   The hinge cap according to claim 1, wherein the groove or the convex portion is formed at least at a symmetrical position of the hinge portion.

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