JP5532548B2 - Hinge cap - Google Patents

Description

  The present invention relates to a cap used by being attached to an opening of a container, and particularly relates to an improvement of a hinge cap having a hinge integrally formed with a thermoplastic resin and having a function of preventing unauthorized opening.

As an application example of the hinge cap, there is a container for a wet sheet described in Patent Document 1. This container is a wet sheet container composed of a cap body that fits into an opening of a container body that stores a roll-shaped wet sheet, and a large lid that is connected to the cap body via a hinge.
The hinge cap can be easily opened and closed many times. Therefore, the hinge cap is highly convenient in such an application that the contents are not used up at one time and are used continuously. However, in the case of this container, no special tampering prevention measures are taken because the contents are not food.

  In the case where the contents are food, in recent years, it has become common to take measures to prevent unauthorized opening for the purpose of preventing tampering. Conventionally, many hinge caps made of thermoplastic resin that are attached to the opening of containers such as bottles are used, but as a general structure of these, a cap structure that can be opened by a pull ring is used as the cap body. In general, a structure in which an upper lid connected to the cap body by a hinge is provided is employed.

In these hinge caps, the lid has a double structure of an inner plug and an upper lid, and since there is a space between them, it cannot be molded as a single piece with the upper lid closed. For this reason, it manufactures by the method of shape | molding in the state which opened the upper cover, and closing an upper cover after shaping | molding. (Patent Document 2)
However, the hinge cap manufactured by the method of molding with the top lid opened and closing the top lid after molding has an essentially strong tamper-evident prevention structure even if various measures are taken to prevent tampering. It is something that cannot be done.

  On the other hand, as an example of a cap molded in a closed shape and having an unauthorized opening prevention function, a cap of a beverage PET bottle can be mentioned. The cap of the PET bottle is integrally formed with a cap and a ring continuously provided through a breaking line under the cap, and the cap moves upward by twisting the cap, and the cap and the ring are broken. As a result, opening is performed, so that the structure has a very simple structure, but has a certain effect of preventing unauthorized opening.

  In this way, if the cap body and the cap upper lid can be integrally formed in a closed shape, it is possible to expect a strong unauthorized opening prevention effect while having a simple structure. It is essentially impossible to apply the bottle cap structure to the hinge cap.

Various investigations have been made on the structure of a hinge cap that can be integrally molded with the shape of the top lid closed. However, when molding with the top lid open like a normal hinge cap, the length of the hinge can be freely set. The strength of the hinge part did not pose a problem because it can be designed to be long, but when the upper lid is molded in a closed shape, the length of the hinge part is naturally limited, resulting in frequent top lids. When the opening and closing of the hinge, especially when the upper lid is rotated and torsional stress is applied to the hinge, there is a problem that the hinge base is cracked and the hinge is easily damaged.
JP 2000-355340 A JP 2004-83078

  An object of the present invention is to provide a hinge cap that has a simple structure, has a high function of preventing unauthorized opening, and can withstand frequent opening and closing.

As means for solving the above-mentioned problems, the invention according to claim 1 is a hinge cap comprising a cap body, an upper lid, and a hinge for connecting them, which are used by being attached to an opening of a container. The cap body has an outer peripheral side wall, an opening band provided so as to be cut off by an opening groove carved on the outer peripheral side wall, and a fitting that is provided on the inner surface of the outer peripheral side wall and fits into the opening of the container. The upper lid has a top wall and a side wall of the upper lid, and the side wall of the upper lid is connected to the outer peripheral side wall of the cap body through the opening groove, and the hinge is It is formed on the back of the hinge cap, and when the hinge is viewed from the back, the base located on the side of the hinge that connects to the cap body and the top lid forms a circular arc in the width direction with the center point located outside the hinge. Forming When the hinge is viewed from the side, the base located on the back and front of the hinge connected to each of the cap body and the upper lid forms a circular arc in the thickness direction with the center point located outside the hinge, The hinge cap is characterized in that the radius of the arc in the width direction of the hinge base and the radius of the arc in the thickness direction of the hinge base are both 0.3 mm or more and different from each other .

According to a second aspect of the present invention, in the hinge cap according to the first aspect, the upper lid includes a finger hook protruding outward from a side wall of the upper lid.

The invention according to claim 3, wherein the opening band, formed integrally with the opening band, according to claim 1 or 2, characterized in that it comprises the opening knob with a display indicating the unsealing direction This is a hinge cap.

  The hinge cap according to the present invention is a hinge cap comprising a cap body, an upper lid, and a hinge for connecting them, and the hinge has both a width direction and a thickness direction at a base portion connected to the cap body and the upper lid, respectively. Because it has an arc shape, even if a torsional stress is applied to the hinge by rotating the top lid, the stress is not concentrated and dispersed, so the hinge base is hard to crack and the hinge is damaged. There is nothing.

  Further, the hinge cap according to the present invention comprises a cap body, an upper lid, and a hinge connecting them, and the cap body is provided so as to be cut off by an outer peripheral side wall and an opening groove carved on the outer peripheral side wall. An opening band and a fitting projection provided on the inner surface of the outer peripheral side wall and fitted into the opening of the container; the upper lid has a top wall and an upper lid side wall; and the upper lid side wall has an opening groove. Because it is connected to the outer peripheral side wall of the cap body, it cannot be opened easily unless the opening groove is cut and the opening band is removed. It has a preventive effect.

  In addition, when the radius of the arc in the width direction of the hinge base portion and the radius of the arc in the thickness direction are different, the mechanism of action is not clear, but the strength of the hinge portion is further improved, and the upper lid can be It is not easily damaged even by opening and closing.

  In addition, when the radius of the arc in the width direction of the hinge base is set to 0.3 mm or more, it is a case where a lateral force different from a normal opening / closing or a twisting force is applied to the upper lid. However, the hinge portion is not easily damaged.

  In addition, when the radius of the arc in the thickness direction of the hinge base portion is 0.3 mm or more, even if a force that pulls the upper lid diagonally backward or diagonally forward is applied, the hinge portion can be easily There is no damage.

  In addition, when the upper lid includes a finger hook projecting outward from the side wall of the upper lid, the upper lid can be easily opened and closed because the finger is securely hooked when the upper lid is opened and closed.

  In addition, when the opening band is provided with an opening knob formed integrally with the opening band and having an indication of the opening direction, the opening operation is easy and easy to understand, and the convenience for the user is increased. .

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a schematic view showing an unsealed state of an embodiment of a hinge cap according to the present invention.
FIG. 2 is a front view of the hinge cap shown in FIG. 1 in an unopened state.
FIG. 3 is a cross-sectional view of the hinge cap shown in FIG.

The hinge cap according to the present invention is a hinge cap used by being attached to an opening of a container made of various materials such as glass, paper, and plastic.
The hinge cap according to the present invention is characterized in that it is integrally formed of a thermoplastic resin in a shape in which the container is sealed as shown in FIGS.

As shown in FIGS. 1 to 3, the hinge cap 1 according to the present invention includes a cap body 2, an upper lid 3, and a hinge 4 that connects them, and the cap body 2 includes an outer peripheral side wall 21, and an outer peripheral portion. An opening band 22 provided so as to be cut off by an opening groove 24 formed on the side wall 21, and a fitting protrusion 25 provided on the inner surface of the outer peripheral side wall 21 to be fitted to the opening of the container. Has a top wall 31 and a side wall 32 of the upper lid, and the side wall 32 of the upper lid is connected to the outer peripheral portion side wall 21 of the cap body 2 via the opening groove 24.
Since FIG. 1 is a schematic diagram showing an opened state, the opening band 22 is removed, and the opening band removing portion 22a is shown as a notch.

  Since the hinge cap according to the present invention is formed as a single unit in which each part is connected in this way, it can be formed by one injection molding.

  Moreover, the hinge cap according to the present invention is molded in a shape in which the container is sealed, and is plugged with a strong force into the opening of the container body by a plugging device. Since the plugged hinge cap fits firmly into the recess provided in the opening of the container body, the opening band 22 provided on the outer peripheral side wall 21 of the cap body 2 is used for opening. Unless it is removed, it cannot be easily opened, and if it is illegally opened, it can be easily found, so that it has an essentially high unauthorized opening prevention effect.

In this embodiment, a finger hook 33 is provided on the upper lid 3, and an opening knob 23 is provided on the opening band 22. These are formed integrally with the upper lid 3 and the hinge cap main body 2, respectively. Further, since the opening knob 23 is provided with a display 26 indicating the opening direction, the opening operation is facilitated, and the opening direction is surely performed without error.

  Further, in the present embodiment, as shown in FIG. 3, an inner ring 34 is provided on the inner surface side of the upper lid 3, and although not shown, it fits into the opening of the container body. Therefore, the sealing property of the container is ensured.

FIG. 4 is an explanatory view showing the width direction of the hinge portion of the hinge cap according to the present invention.
The hinge 4 has a substantially rectangular parallelepiped thin plate shape, and FIG. 4 shows a state in which the hinge 4 connecting the cap body 2 and the upper lid 3 is viewed from the back.
The hinge 4 is connected in a circular arc shape at the base portion connected to each of the cap body 2 and the upper lid 3.

  The arc shape of the hinge of the present invention is not limited to the case where only the junction between the hinge and the cap main body and the hinge and the upper lid is an arc shape, and the interval between them is a straight line shape. Includes the case of a circular arc shape.

If the hinge-cap body or the hinge-lid connecting portion does not have an arc shape, even if it is a normal opening / closing operation, the connecting portion is likely to crack, etc. It was.
In the hinge cap according to the present invention, since the arc shape is applied to the connecting portion, the hinge 4 is hardly damaged in the normal opening and closing of the upper lid, but the upper lid 3 is forcibly tilted or twisted laterally. When such a force is applied, the hinge may be damaged or cut from the corner of the connecting portion between the upper lid 3 and the hinge 4 or the connecting portion between the cap body 2 and the hinge 4. The inventors have found that even in such a case, if the radius 41 of the arc in the width direction of the hinge is 0.3 mm or more, the hinge can be prevented from being damaged.

  The radius of the arc is most preferably about 0.5 mm.

FIG. 5 is an explanatory view showing the thickness direction of the hinge portion of the hinge cap according to the present invention.
Similarly to the width direction, the hinge 4 is connected in a circular arc shape at the base portion connected to each of the cap body 2 and the upper lid 3 in the thickness direction.

  Unlike normal opening and closing operations, when the upper lid 3 is pulled diagonally forward or diagonally rearward, the hinge is damaged from the connecting portion of the upper lid 3 and the hinge 4 or the corner portion of the connecting portion of the cap body 2 and the hinge 4. Disconnection may occur.

  By setting the radius of the arc in the thickness direction to 0.3 mm or more, it is possible to prevent the hinge portion from being easily damaged by such an unexpected operation. As for the radius of the arc in the thickness direction, about 0.5 mm gives the most preferable result.

  As a material of the hinge cap according to the present invention, a normal thermoplastic resin can be used, and a polyolefin resin such as polyethylene resin and polypropylene resin, a polyester resin such as PET resin, a polyamide resin such as nylon, and the like. It can be used. Further, as a method for forming the hinge cap according to the present invention, a normal injection molding method is used.

The schematic diagram in the opened state of one Example of the hinge cap which concerns on this invention. The front view in the unopened state of the hinge cap shown in FIG. Sectional drawing of the hinge cap shown in FIG. Explanatory drawing which showed the width direction of the hinge part of the hinge cap which concerns on this invention. Explanatory drawing which showed the thickness direction of the hinge part of the hinge cap which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Hinge cap 2 ... Cap main body 21 ... Outer peripheral side wall 22 ... Opening band 22a ... Opening band removal part 23 ... Opening knob 24 ... Opening groove 25 ... Fitting protrusion 26 ... Display indicating opening direction 3 ... Upper lid 31 ... Top wall 32 ... Side wall 33 of upper lid ... Finger hook 34 ... Inner ring 4 ... Hinge 41 ... Radius of arc in width direction of hinge base 42 ... Radius of arc in thickness direction of hinge base

Claims (3)

A hinge cap comprising a cap body, an upper lid, and a hinge connecting the cap body, which is attached to an opening of a container, wherein the cap body has an outer peripheral side wall and an opening groove carved on the outer peripheral side wall. An opening band provided so as to be able to be cut off, and a fitting protrusion provided on an inner surface of the outer peripheral side wall and fitted into the opening of the container, and the upper lid includes a top wall and a side wall of the upper lid. The side wall of the upper lid is connected to the outer peripheral side wall of the cap body through the opening groove, and the hinge is formed on the back surface of the hinge cap. base flanking the hinge connecting the respective body and the upper lid is, forms an arc in the width direction located outside the hinge the center point, when viewed hinge from the side, respectively the cap body and the upper cover Base portion, a center point forms an arc in the thickness direction located outside the hinge, the thickness of the radius and the hinge base of the arc in the width direction of the hinge base is located on the back and front of the focal hinges A hinge cap characterized in that the radii of the circular arcs in the direction are 0.3 mm or more and are different from each other . The upper lid, the hinge cap according to claim 1, characterized in that it comprises a finger hook which projects outwardly from the side wall of the upper lid. The hinge cap according to claim 1 or 2 , wherein the opening band includes an opening knob formed integrally with the opening band and having an indication of an opening direction.

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