JP2012101831A - Packaging container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a container that prevents a lid from being separated from a body even when a twisting force acts in a packaging container having a fitting part of a rectangular circular shape in plan view.SOLUTION: In an inner fitting container composed of a body 2 and a lid body 1, an engaging linear protrusion 27 protruding inward is formed on a fitting wall 22 of a body 2, an engaging concave groove 17 dented inward and engaging with the engaging linear protrusion 27 of the body fitting wall 22 is formed in a fitting wall 12 of the lid body 1, and the engaging linear protrusion 27 provided on the body fitting wall 22 is engaged with the engaging concave groove 17 provided in the fitting wall 12 of the lid body. Thus, the lid body 1 is prevented from being separated from the body 2 even when a twisting force acts on the container with the lid body 1 fitted to the body 2.

Description

Hereinafter, the inner fitting described in the present specification refers to a lid formed with a lid fitting wall having a reverse taper structure extending outward while hanging downward from a horizontal flange, and hanging downward from the upper end of the opening. The lid and main body are fixed in a state where the main body fitting wall and the lid fitting wall are in contact with each other when the main body is formed with an inverted taper main body fitting wall that extends outward. This is a joint method.

The present invention relates to an internal fitting type packaging container composed of a container body having an upward opening and a lid that closes the opening of the body, and the force in the twisting direction is applied when the lid is fitted to the body. It relates to a container whose lid does not easily come off even if it works.

In the inner fitting container, the main body fitting wall and the lid fitting wall are formed in an inverted taper structure, and therefore the lower end portion of the lid fitting wall is wider than the main body opening. Therefore, in order to fit the lid to the main body, it is necessary to push the lid fitting portion into the main body fitting portion while bending the lid and the main body, and the lower end portion of the lid fitting wall is the main body opening. Since the cover is pushed wider, the fitted state is maintained. To remove the lid from the main body, the lid is pulled upward while bending the lid and the main body.

The reverse taper structure formed in the fitting part of the main body and the lid in the inner fitting container having the separate main body and the lid is an inclined state in which the fitting wall extends outward while hanging down. That is, the structure is conventionally known in the field of synthetic resin packaging containers (see Patent Document 1).

JP 2010-52787 A

However, as described in Patent Document 1, in the conventional inner-fitting packaging container, the fitting part 116 of the lid 100 as shown in FIG. Since the fitting portion 226 of the main body 200 is fitted only by the contact between the lid fitting wall 112 having a reverse taper structure and the main body fitting wall 222, the container having a rectangular annular fitting portion is not shown in the figure. When force in the twisting direction as shown in FIG. 10 is applied, there is a problem that the fitting is released and the lid body is easily detached from the main body.

The present invention is a packaging container having a rectangular annular fitting portion having rounded corners in plan view, and an engagement protrusion protruding inward is formed on the body fitting wall, and the lid fitting The wall is a packaging container in which an engagement concave groove recessed inward to engage with the engagement protrusion of the main body fitting wall is formed.

In the packaging container, the engagement protrusion provided on the body fitting wall and the engagement groove provided on the lid fitting wall are formed at least at rounded corners of the fitting portion.

In the packaging container, four sides of the fitting portion or two opposite sides may be formed in a curved shape.

According to the present invention, with the above configuration, the engagement protrusion provided on the body fitting wall is engaged with the engagement groove provided on the cover fitting wall, so that the cover is fitted to the body. Even when a twisting force is applied to the container, the lid body is less likely to come off the main body.

It is the perspective view which showed Embodiment 1 of the packaging container which concerns on this invention, and is a figure before a main body and a cover body fit The figure which showed the central section of Drawing 1 The figure which expanded the principal part Y of FIG. The figure which showed the state which fitted the main body of the cover body of FIG. The figure which expanded the principal part Z of FIG. The top view of the lid of Embodiment 2 The top view of the main body of Embodiment 2 The perspective view which showed Embodiment 3. Cross-sectional view of the main parts of the lid and main body in a conventional packaging container The figure which shows the state which the twisting force worked on the conventional packaging container

A Packaging container 1 Lid 11 Horizontal flange 12 Lid fitting wall 13 Narrow horizontal wall 16 Lid fitting part 17 Engaging groove 2 Main body 21 Horizontal flange 21A Annular ridge 22 Main body fitting wall 23 Narrow horizontal horizontal Wall 26 Body fitting part 27 Engagement ridge

Hereinafter, embodiments for carrying out the present invention will be described in detail.
The container which concerns on this invention is comprised by the main body which has an opening upwards, and the cover body which block | closes the opening of a main body, and is a container which a main body and a cover body fit by an internal fitting structure.

The main body is formed with a main body fitting wall having a reverse taper structure that hangs downward from the upper end of the opening and spreads outward, and the main body side wall and the bottom through a narrow horizontal wall from the lower end of the main body fitting wall to the entire circumference. It is formed in a concave shape that can store articles continuously on the wall.

The main body fitting wall is formed in a rectangular ring shape with rounded corners in plan view, and is provided with an engaging protrusion that bulges inward.

The lid is formed with a lid-fitting wall having a reverse taper structure that extends outward while hanging downward from the horizontal flange, and the lid is covered through a narrow horizontal wall from the lower end of the lid-fitting wall to the entire circumference. It is continuous with the body side wall and the upper wall.

The lid fitting wall is formed in a rectangular ring shape with rounded corners in plan view, and is provided with an engaging groove recessed inward.

When the lid body is pushed into the main body, the lid body fitting wall descends over the engagement protrusion provided on the main body fitting wall, and the lid body fitting portion and the main body fitting portion are in the inner fitting state. At the same time, the engaging protrusion provided on the main body fitting wall enters and engages in the engaging groove provided on the lid fitting wall.

As for the fitting part of the said main body and a cover body, four sides or two opposite sides may be formed in curve shape.

The body and the lid need to be flexible enough to be fitted to each other. Specifically, synthetic resin is used. More specifically, polyethylene, polyethylene terephthalate, amorphous polyethylene terephthalate, There are polypropylene, polyvinyl chloride, polystyrene, biaxially stretched polystyrene, high impact polystyrene, ethylene vinyl alcohol, and additives such as fillers, pigments, plasticizers, anti-aging agents, and lubricants are added to these synthetic resins. The synthetic resin sheet of these materials may be heat-molded.

Embodiment 1 which concerns on this invention is demonstrated in detail, referring drawings.
FIG. 1 shows a perspective view of the packaging container A according to the first embodiment of the present invention in a state before the lid 1 is fitted to the main body 2.

The lid 1 is formed with a reverse-tapered lid fitting wall 12 that extends downward while hanging downward from the inside of the horizontal flange 11, and a narrow horizontal wall 13 is interposed at the lower end of the lid fitting wall 12. Thus, the lid side wall 14 and the upper wall 15 are continuous.

The main body 2 is formed as a reverse-tapered main body fitting wall 22 in which an annular ridge 21A is erected on a horizontal flange 21 and the inner wall of the annular ridge 21A hangs downward and expands outward. A main body side wall 24 and a bottom wall 25 are continuous below the wall 22 through a narrow horizontal wall 23.

In the inner fitting type packaging container, the lid fitting wall 12 and the main body fitting wall 22 have a reverse taper structure, and the lid 1 and the main body 2 have the lid fitting wall 12 and the main body fitting wall 22. Are fitted in contact with each other, the outer diameter of the lower end of the lid fitting wall 12 is larger than the outer diameter of the upward opening X formed by being surrounded by the body fitting wall 22, so that the fitting is naturally released. There is nothing.

2 is a central cross-sectional view of FIG. 1, and FIG. 3 is an enlarged view of the main part Y of FIG. 2, and the structure of the packaging container A will be described in more detail. The lid body 1 is continuous from the lower end of the lid body fitting wall 12 to the inner side over the entire circumference from the lower end of the lid body mating wall 12 that extends outward while hanging downward from the inner peripheral edge of the horizontal flange 11. A lid body fitting portion 16 having a step structure is formed with the narrow horizontal wall 13, and the lid side wall 14 and the upper wall 15 are continuous from the fitting portion 16. 12 is provided with an engaging concave groove 17 recessed inward.

The main body 2 has an annular protrusion 21A standing on the horizontal flange 21, and the inner wall of the annular protrusion 21A becomes a reverse-tapered main body fitting wall 22 that hangs downward and expands outward. And a narrow horizontal wall 23 continuous from the lower end of the main body fitting wall 22 to the entire circumference forms a main body fitting portion 26 having a stepped structure, and the main body side wall 24 and the bottom wall 25 are formed from the main body fitting portion 26. The main body fitting wall 22 is provided with an engaging protrusion 27 that bulges inward. An upward opening X is formed inside the annular protrusion 21A.

As shown in FIG. 1, the lid fitting part 16 formed on the lid 1 in the first embodiment and the body fitting part 26 formed on the main body 2 are rectangular annular shapes having rounded corners in plan view. It has become.

FIG. 4 is a sectional view showing the fitting state of the lid 1 and the main body 2 in Embodiment 1, FIG. 5 is an enlarged view of the main part Z of FIG. 4, and the process of fitting the lid 1 to the main body 2 Will be explained. When the lid 1 is pushed into the main body 2, the lid fitting wall 16 gets over the engagement protrusion 27 provided on the main body fitting wall 26 to be in an inner fitting state and at the same time is provided on the lid fitting wall 16. The engaging protrusion 27 provided on the main body fitting wall 26 enters and engages with the engaging concave groove 17. The protruding height of the engaging protrusion 27 from the main body fitting wall 26 may be such that the lid fitting wall 16 can get over while being bent.

In the inner fitting container, as shown in FIG. 9, since it is fitted by the reverse taper structure of the lid fitting wall and the main body fitting wall, the fitted state is maintained even without other fitting means. However, in a container having a rectangular fitting portion, when the contents are stored in the container, when the corner portion of the container is picked up and lifted, the twisting force is increased by the weight of the contents as shown in FIG. The working fitting state is released and the lid body may come off from the main body.

In the present invention, the engagement protrusion projecting inwardly provided in the body fitting wall 22 of the main body 2 is inserted into the engagement groove 17 recessed inwardly provided in the cover body fitting wall 12 of the lid body 1. When the strip 27 enters and engages, the rectangular container is provided with a double disengagement prevention function by the disengagement prevention function by the engagement of the engagement groove 17 and the engagement protrusion 27 and the disengagement prevention function of the inner fitting itself. A more powerful detachment prevention function works against the torsional force acting on the

The engagement protrusion of the main body 2 may be formed over the entire circumference of the main body fitting wall 22 or may be formed on a part of the main body fitting wall 22. Even if it forms over the perimeter of the joint wall 12, you may form in a part of the cover body fitting wall 12 by the length suitable for the engagement protrusion of the main body 2. FIG.

Another embodiment 2 will be described with reference to FIG. 4 showing a plan view of a lid 1 ′ and FIG. 5 showing a plan view of a main body 2 ′.

In the second embodiment, as shown in FIG. 4, the lid body 1 'is provided with engagement grooves 17' only in the rounded corners of the rectangular annular lid fitting portion 16, and the main body 2 'is shown in FIG. As shown, engagement protrusions 27 ′ are provided only at the rounded corners of the rectangular annular body fitting portion 26.

Embodiment 3 is a perspective view of a packaging container A ″ showing a state before the lid 1 ″ is fitted to the main body 2 ″ in another embodiment. The main body fitting portion of the main body 2 ″ in the third embodiment. 26 ″ has a deformed rectangular ring shape with four sides 26 ″ A curved, and the lid body fitting portion 16 ″ of the lid body 1 ″ has a curved side 16 ″ A which is curved to fit the body fitting portion 26 ″. A deformed rectangular ring having

In the third embodiment, engagement protrusions 27 ″ provided on the main body 2 ″ are formed continuously from the rounded portions at the four corners of the main body fitting portion 26 ″ and a part of the curved side 26 ″ A from the rounded portions. A rounded portion at the four corners of the lid fitting portion 16 ″ and a curved side 16 ″ from the rounded portion so that the engagement concave groove 17 ″ provided in the lid 1 ″ fits the engagement protrusion 27 ″ of the main body 2 ″. A part of A is formed continuously.

As described above, in a packaging container having a rectangular shape in a plan view of the fitting portion, if the fitting portion has rounded corners, the fitting portion has a curved line even if the shape of each side is a straight line. May be.

Claims (4)

An inner fitting type synthetic resin packaging container composed of a main body and a lid, each of which is provided with a fitting portion having a reverse tapered fitting wall. The joint portion is formed in a rectangular ring shape with rounded corners in plan view, and an engagement protrusion protruding inward is formed on the body fitting wall, and the body fitting wall is formed on the lid fitting wall. A packaging container characterized in that an engagement concave groove is formed on the inner side to be engaged with the engagement protrusion. The engagement protrusion formed in the main body fitting wall and the engagement concave groove formed in the lid fitting wall are formed at round portions of at least four corners of the fitting portion. Packaging container. The packaging container according to claim 1 or 2, wherein four sides or two opposite sides of the fitting portion are formed in a curved shape. The packaging container according to claim 1, wherein the main body and the lid are packaging containers formed by heating a synthetic resin sheet.

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