JP2000118549A - Fitting package container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve reliability and sealability held in a closed state by providing a protrusion on a hinge for connecting a lid and a container body which are made of a thin synthetic resin and forming, on an upper part of a peripheral wall of the container body, a shelf with which a summit of the protrusion formed outside an opening periphery of the lid comes into contact when the container is closed. SOLUTION: The fitting package container comprising lid 1 and a container body 2 which are connected via a hinge 3 has a protrusion 12 provided along a periphery of an opening 11 of the lid 1 and an outer peripheral wall 121 extended along an outer periphery of the protrusion 12. A flange 13 is provided at an end rim of the outer peripheral wall 121, while a flange 23 is provided along a periphery 21 the container body 2. An upper part of a peripheral wall 24 of the container body 2 is made to protrude outward from the body 1, while a lower part of the peripheral wall 24 of the body 2 is recessed inside the body 2 to provide a swell inside the body 2. An upper face of the swell is formed to be approximately in parallel to a bottom face of the container body 2, thereby providing its upper face as a shelf 242. The hinge 3 makes a protrusion 35 protrude at a tip which is a center line in a long axial line direction of a center strip.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fitted packaging container, and more particularly to a fitted packaging container made of thin synthetic resin which is suitably used for packaging foods and the like.

[0002]

2. Description of the Related Art Conventionally, as a packaging container for packaging, for example, foods, a packaging container comprising a container body and a lid made of a thin synthetic resin has been widely used. However, in this packaging container, when storing an object to be packaged and closing and packaging the container,
It is necessary to bind the container body and the lid with a rubber band or a string so as not to open the lid, and this binding requires a great deal of labor and is disadvantageous in that it is complicated.

In order to solve such a drawback, a fitting packaging container has been newly developed in which the container body and the lid are connected to each other by a hinge, and the container body and the lid are fitted to each other. This fitted packaging container has an advantage that the binding work on the packaging container is not required, and is widely used. However, in order to close and package this fitted packaging container, the container body and the lid are connected by a hinge, and the vicinity of both ends of at least two pairs of opposing sides-for example, the container body and the lid. In the case where the shape of each opening and bottom surface is a square or a substantially square such as a square or a rectangle (the above-described square having rounded corners), these squares or substantially squares The four corners of the quadrilateral are held together at the same time by the fingers of both hands and fitted together. For example, to suppress the four corners,
Even if both hands are used, it must be performed in two actions.

Further, it has not been easy to close the container in one operation by superposing the lid on the container body and holding the bottom of the lid with one hand. Accordingly, automation of such closing of the fitted packaging container is complicated and difficult, which is a drawback of the fitted packaging container. If the fitting and closing of the fitted packaging container can be performed by one operation, automation becomes simple and easy, and the labor for packaging the fitted packaging container is greatly reduced, and the required time is greatly reduced. Will be.

[0005] In addition, as the fitting packaging container in which the container closing can be easily automated, so-called inner fitting type packaging container and outer fitting type packaging container (hereinafter referred to as inner fitting packaging container and outer fitting packaging, respectively). Packaging container). The inner fitting packaging container is a fitting packaging container of a type in which a projection is provided outside the periphery of the opening of the lid, and the projection is fitted into the opening of the container body. In addition, the outer fitting packaging container,
A fitting packaging container of a system in which a projection is provided outside the periphery of the opening of the container body and the projection is fitted into the opening of the lid. However, the conventional packaging container of such a fitting system is
Once closed, the lid either opened by itself while standing or the sealability was not high enough to be practically satisfactory.

The present inventor can close and package in one operation, and the automation of container closing is simple and easy.
Moreover, once the closure has been completed, the object of the present invention is to develop a fitted packaging container in which the lid does not open by itself while standing, and the tightness of the fitted packaging container is improved. In the hinge connecting the lid and the container body, the effective width of the hinge on the container body side or the effective length of the container body side and the lid side on the hinge connecting the lid body and the container body were repeatedly studied. By making the effective width or the effective length on the lid side different from each other, a new finding that the above-mentioned object can be achieved was obtained. A patent application was filed (Japanese Patent No. 2777222 and Japanese Utility Model Application Laid-Open No. 6-7285).
No. 5).

Further, the inventor of the present invention has further studied the above-mentioned novel fitted packaging containers. As a result, these fitted packaging containers can be closed and packaged in one operation, and automation of the closing of the containers is achieved. It is simple and easy to use, and once closed, most fitting packaging containers do not open by themselves when left unattended, and have a tighter seal than conventional fitting packaging containers. Although it has been dramatically improved, the inside of the lid is open by itself and / or a gap is formed near the hinge at the side where the hinge connects to the hinge at the overlapping surface of the lid and the container body. It was acknowledged that there were some that opened and the certainty of maintaining the closed state and the one that was insufficient in the sealing property.

The inventor of the present invention has made repeated studies on the novel fitting packaging container by the inventor for the purpose of further improving the reliability of maintaining the closed state and the hermeticity. The present inventors have obtained a new finding that the above-mentioned object can be achieved by providing a ridge along the tip, and have arrived at the present invention based on this new finding.

[0009]

That is, the first aspect of the present invention relates to an inner-fitting packaging container, in which a lid and a container body made of a thin-walled synthetic resin, and the lid and the container body are provided. A projection is provided on the outer periphery of the opening of the lid, an outer peripheral wall of the projection extends toward the bottom of the lid, and an outer peripheral end of the projection is provided. A flange is provided to extend outward from the edge, and a flange is provided to extend outward at a periphery of the opening of the container body, and a flange of the lid and a flange of the container body are provided. When the container is closed, the upper portion of the peripheral wall including the opening peripheral edge of the container main body is brought into contact with the outer peripheral wall of the projection of the lid fitted into the opening of the container main body when the container is closed. The effective width of the hinge on the container body side The effective width of the lid is larger than the effective width on the lid side, and a ridge is provided along the protruding end of the hinge, and the upper part of the peripheral wall of the container body is brought into contact with the top of the projection of the lid when the container is closed. A fitting packaging container characterized in that a shelf is provided by projecting a peripheral wall of a container body outward.

[0010] The second invention relates to an outer fitting packaging container, which comprises a lid and a container body made of a thin synthetic resin, and a hinge for connecting the lid and the container body. A projection is provided outside the periphery of the opening of the container body, and an outer peripheral wall of the projection extends toward the bottom of the container body, and extends outward from an edge of the outer peripheral wall of the projection. A flange is provided, and a flange is provided on the periphery of the opening of the lid so as to extend outward.
The flange of the container body and the flange of the lid are overlapped with each other when the container is closed, and the upper part of the peripheral wall including the opening peripheral edge of the lid is fitted into the opening of the lid when the container is closed. The container body side effective width of the hinge is made smaller than the effective width of the hinge lid side, and a ridge is provided along the projection of the hinge, A fitting packaging container, characterized in that a shelf part is provided at the upper part of the peripheral wall of the lid so as to be in contact with the top of the projection of the container body when the container is closed, with the peripheral wall of the lid protruding outward. It is. ADVANTAGE OF THE INVENTION In the fitting packaging container of this invention, closure of a container is easy, automation of closure is simplified, and the reliability and sealing property which hold the closed state of the fitting packaging container once closed are improved. .

Furthermore, in the fitted packaging container of the present invention, preferably, (1) each of the outer peripheral wall of the projection of the lid and the upper part of the peripheral wall of the container main body, and the outer peripheral wall of the projection of the container main body and the lid (2) One or both of the flange of the lid and the flange of the container body are provided on the upper portion of the peripheral wall of A step is formed near the hinge, and / or (3) the lid and the container main body are fitted to each other at least along the side opposite to the hinge side (the opposite side of the hinge, and so on) when the container is closed. The fitting protrusion and the fitting depression may be provided. With these, the fitted packaging container of the present invention makes it easier to close the container, simplifies automation of closure, can more reliably maintain the closed state of the fitted packaging container once closed, and has a tight sealing property. Has been further improved.

BEST MODE FOR CARRYING OUT THE INVENTION

The container body and lid of the fitted packaging container in the present invention are both made of a thin thermoplastic synthetic resin,
Usually, for example, it is obtained by vacuum forming, pressure forming, vacuum pressure forming or press forming. Further, the thermoplastic synthetic resin used is not particularly limited, but practically, for example, olefinic plastics such as polyethylene and polypropylene, acrylic plastics such as polymethyl methacrylate and acrylonitrile resin,
Vinyl plastics such as polyvinyl chloride, polyvinyl acetate, polyvinyl alcohol and polyvinylidene chloride, styrene plastics such as polystyrene and acrylonitrile / styrene resin, and aromatic polyesters such as polyethylene terephthalate are preferably used.

The shapes of the container body and the lid are not particularly limited. However, in practice, both the cylindrical shape and the inverted truncated cone shape in the open state of the container are used. In addition, the shapes of the bottom surface (the same applies to the following when the container is open) and the shape of the opening of the container body and the lid are, for example, circular, elliptical, and elliptical, and substantially straight or curved with a small degree of curvature. They are notched circles such as circles, ellipses and ellipses, and polygons such as triangles, squares, pentagons and hexagons. The polygon may have a rounded apex angle and / or a curved side with a small degree of outward curvature (hereinafter referred to as a substantial polygon). Among them, practically, those having a substantially square shape are preferable, and those having substantially trapezoidal, square, and rectangular shapes are particularly preferable.

In the present invention, "upper" means a portion closer to the opening in each of the lid and the container body. When the shape of each opening of the lid body and the container body is a shape including a straight line or a curve having a small degree of curvature, the hinge is provided directly or through the flange without passing through the flange at the periphery of the opening. . In addition, when the shape of each opening of the lid and the container main body does not include a straight line or a curve with a small degree of curvature, the hinge is provided via a flange. The hinge connects the lid and the container body to each other. The direction in which the hinge is provided is not particularly limited, but is generally provided along the longitudinal direction of the lid and the container body. For example, when the shape of each opening of the lid and the container body is a rectangle such as a rectangle or a substantially rectangle, the hinge is usually provided on each long side of the lid and the container body. Is preferred, but may be provided on the short side.

There is no particular limitation on the shape of the transverse end face of the hinge (the end face cut perpendicular to the long axis direction of the hinge, the same applies hereinafter), but in practice, it is usually, for example, V-shaped, semicircular or U-shape or a shape that lacks one side of a square (hereinafter also referred to as a U-shape) or a shape in which the apex angle is rounded and / or the side is a curve with a small degree of outward curvature (hereinafter, abbreviated as For example, it is referred to as a substantial shape such as a substantial U-shape). Among these, a semicircular arc or a U-shape is preferable, and a U-shape or a substantially U-shape is most preferable.

In the hinge of the inner fitting packaging container according to the present invention, the effective width on the container body side is wider than the effective width on the lid body side. Further, in the hinge of the outer fitting packaging container of the present invention, the effective width on the container body side is smaller than the effective width on the lid body side. Here, the effective width of each hinge is defined as a distance from a protruding end of the hinge to each joint end of the hinge. In addition, the projecting end of the hinge is a portion where the opening of the lid and the container main body are projected to the outermost of the hinge in a state where both are substantially horizontal planes when the container is opened, The joint end of the hinge is a joint between the hinge and the opening or flange of the lid and a joint between the hinge and the opening or flange of the container body. For example, when the shape of the end face of the transverse portion of the hinge is a semicircular arc and a U-shape, the most protruding portion, and when the shape is a V-shape, the vertex is the tip of the hinge.

Further, in a hinge having a U-shaped or substantially U-shaped cross-section end surface, a surface including the center side of the three sides is defined as a central band, and the center of the width of the central band is determined. Corresponds to the tip of the hinge. The length from each edge of the central band to each joint end of the hinge is the effective width on the container body side and the effective width on the lid body side, respectively.

The difference between the two effective widths of the hinge depends on the type and thickness of the thin synthetic resin, the size of the container body and the lid, and cannot be specified unconditionally.
Practically, it is preferably about 1/3 to 2/3 of the width of the hinge. Here, the width of the hinge is defined as an interval between both joint ends. In such a U-shaped or substantially U-shaped hinge, the width of the central band corresponds to the width of the hinge.

A ridge is provided which protrudes outward along the tip of the hinge. There is no particular limitation on the shape of the cross-section end face of this ridge, but in practice, it is usually, for example, V-shaped, semicircular to U-shaped, U-shaped or substantially U-shaped. Among these, a semicircular arc or a U-shape is preferable, and a U-shape or a substantially U-shape is most preferable.

The width and height of the ridge provided along the protrusion of the hinge differ depending on the thickness and type of the thin synthetic resin, the size of the container itself, and the like, and cannot be specified unconditionally. The width of the ridge is 1 / the width of the hinge
The height of the ridge is about ３ to の of the height of the hinge (the distance from the joint end of the hinge on the container body side to the hinge tip). Preferably.

The fitted packaging container of the present invention includes both the inner fitted packaging container and the outer fitted packaging container. In the inner fitting packaging container of the present invention, the opening peripheral edge of the lid is surrounded from the outside, and the projection is provided with an intermittent or continuous projection. An outer peripheral wall is provided on the outer peripheral edge of the projection toward the bottom of the lid. When the container is closed, the surface of the outer peripheral wall of the projection is brought into contact with the inner peripheral surface of the upper part of the peripheral wall including the peripheral edge of the opening of the container body, and the projection of the lid is fitted into the interior of the container.
Preferably, a fitting projection and a fitting depression which are fitted to each other are provided on the outer peripheral wall of the projection of the lid and the upper part of the peripheral wall of the container body brought into contact therewith. By fitting these fitting projections and fitting depressions to each other, the reliability of maintaining the fitting state between the lid and the container body is further improved.

For example, if a fitting projection is provided on the outer peripheral wall of the projection of the lid, a fitting depression is provided on the upper portion of the peripheral wall of the container body, and a fitting depression is provided on the outer peripheral wall of the projection of the lid. If provided, a fitting projection is provided on the upper part of the peripheral wall of the container body. The shape and size of the fitting projection and the fitting depression are not particularly limited. However, as the fitting projection and the fitting depression, a ridge and a groove are usually provided, respectively.
Preferably, one or a plurality of these ridges and grooves are provided substantially in parallel or intermittently or continuously with the bottom surface of the lid and the bottom surface of the container body, respectively.

The upper part of the peripheral wall of the container main body is made to protrude outward from the container main body, and a projection is provided inside the container main body.
The upper surface of the projecting portion is stretched as a shelf inside the container body. When the container is closed, the shelf is brought into contact with a part or all of the top of the projection of the lid, whereby the lid is received by the shelf. For this purpose, the height of a part or the whole of the projection of the lid is at least equal to the distance from the peripheral edge of the opening of the container body to the shelf. It is preferable that the height of the projection of the lid is slightly larger than the distance from the peripheral edge of the opening of the container body to the shelf on the hinge side. The difference between the height of the lid projection on the hinge side and the distance from the opening periphery of the container body to the shelf depends on the type and thickness of the thin synthetic resin and the size of the container, and cannot be specified unconditionally. In practical use, it is usually about 1 to 5 mm, preferably 2 to 5 mm.
It is about 4 mm.

A flange is provided so as to extend outward from the edge of the outer peripheral wall of the projection of the lid. Further, a flange is provided on the periphery of the opening of the container body so as to extend outward. When the container is closed, the flange of the lid and the flange of the container body are overlapped with each other.

To facilitate opening the closed container, tongues projecting outward from the periphery of the flange of the lid and / or from the periphery of the flange of the container body are provided or the flanges which are overlapped with each other are provided. One part is cut off, for example, a corner of the flange of the container body on the anti-hinge side, or a corresponding portion of the flanges overlapped with each other, for example, at least one of the corners on the anti-hinge side. In-, it is preferable that at least one of the two flanges is curved in a direction opposite to the overlapping surface of the flanges so that a gap is provided at the outer peripheral edge of the two flanges.

In addition, many small irregularities are provided as a non-slip at a portion of the other flange corresponding to the cut portion of the one flange, or at least a portion curved in the opposite direction to the overlapping surface of the flanges. It is further preferable to provide small unevenness on one flange as a non-slip.

It is preferable that at least one of the flange of the lid and the flange of the container body is provided with a step near the hinge on the side connected to the hinge. as a result,
In the container in the closed state, a gap is formed near the hinge on the side connected to the hinge on the overlapping surface of both flanges. For example, if the shape of the lid and the opening of the container body are both rectangular, the hinge is
Normally, since the opening is provided on the long side of the opening, the step is formed on the flange on the short side connected to the hinge.

The step is formed by connecting a connecting portion, which is a plane orthogonal to or oblique to the surface of the flange or a curved surface having a small degree of curvature and curved outward, between the hinge side and the opposite hinge side of each flange. It is formed by interposing between them. However, this does not prevent the connecting portion from being directly connected to the joining end. In addition, the length of the connecting part is the thickness of the thin synthetic resin,
It depends on the type, the size of the fitting packaging container, the fitting method, and the like, and cannot be specified unconditionally. However, usually, in the inner fitting packaging container, the length of the side where the connection portion is provided is 1/1.
It is preferable to be about 0 to 1/8. Further, the length of the connection portion is preferably longer in the outer fitting packaging container than in the inner fitting packaging container, and is usually 1/4 to 1/1 of the length of the side where the connection portion is provided. It is preferable to be about 3. When a step is provided on both the flange of the lid and the flange of the container body, the connecting portion for providing these steps is usually provided at substantially the same position, but may be provided at positions different from each other. Good.

The position of the step differs depending on the type and thickness of the thin synthetic resin, the respective shapes and sizes of the lid and the container main body, and cannot be specified unconditionally. The length of the side intersecting the hinge of the flange is usually about half or less, preferably 1/4 to
The range is about 1/3. In addition, the height of the step formed by the connection portion differs depending on the type and thickness of the thin synthetic resin, the size of the container, the width of the flange, and the like, and cannot be specified unconditionally, but is not practical at the largest portion. Usually, it is about 1 to 5 mm, preferably about 2 to 4 mm.

The shape of the gap formed on the overlapped surface of both flanges is such that when the connecting portion is provided at substantially the same position on the overlapping surface of both flanges, and when the gradient and height of the connecting portion are substantially equal, the lid is closed. The shape of the gap on the body side and the shape of the gap on the container body are substantially equal to each other, become symmetrical with the overlapping surface of both flanges as the axis of symmetry, and the connection portion is provided at a different position on the overlapping surface of both flanges. In this case, the shape of the gap on the lid side and the shape of the gap on the container body are different from each other.

The typical shape of the gap is, for example, (1) when the two flanges are brought close to each other at the two joining ends, when the two flanges have a symmetrical shape with the symmetrical axis being the overlapping surface of the two flanges. The distance between the overlapping surfaces gradually increases as the distance between the joint ends increases, reaches a maximum at the hinge-side end of the joint, and then increases as the distance between the joint ends further increases. Is reduced according to the slope of the connection, the spacing is substantially zero at the end of the connection opposite the hinge, the surfaces of the two flanges are substantially brought into contact with each other, and the two (2) The distance between the surfaces of the two flanges at the joint ends is the maximum, and the maximum distance between the joint and the end of the joint is on the hinge side. And then further away from both ends The distance is reduced according to the slope of the connection, the distance is made substantially zero at the non-hinge end of the connection, the surfaces of the two flanges are brought into substantial contact with each other, and A shape that reaches the edge on the opposite hinge side of both flanges as it is
May be written).

When the step is provided on one of the flange of the lid and the flange of the container body, the shape of the gap is determined by the gap formed when the step is provided on both flanges. Is a shape divided by a line passing through both flanges.

In order to further improve the reliability of holding the container in the closed state, the flange of the lid and the flange of the container main body are provided with a fitting projection and a fitting depression which are fitted to each other when the container is closed. Is preferred. These fitting protrusions and fitting depressions are provided on any side other than the side on which the hinge is provided, but are preferably provided at least along the side on the side opposite to the hinge. If any one of the flange of the lid and the flange of the container body is provided with a fitting projection, the other is provided with a fitting depression.

It is preferable that these fitting projections and fitting depressions are provided slightly apart from each other so as not to come into contact with the outer peripheral wall edge of the lid projection and the opening peripheral edge of the container body. . As these fitting protrusions and fitting depressions, intermittent or continuous ridges and grooves are usually provided, respectively.

Further, in the present invention, the outer fitting packaging container corresponds to a fitting packaging container in which the lid and the container main body are reversed in the inner fitting packaging container to form the container main body and the lid. A projection is provided which surrounds the outer periphery of the opening of the container body, is intermittent or continuous. When the container is closed, the surface of the outer peripheral wall of the projection is brought into contact with the inner peripheral surface of the upper portion of the peripheral wall of the lid, and the projection of the container main body is fitted into the inside of the container.

In the fitted packaging container of the present invention, in a state in which the lid is overlapped with the container body, two places of the flange which are overlapped with each other on the opposite hinge side are simultaneously held down by the fingers of both hands, or the lid is closed. The container can be closed in one operation only by holding down the bottom surface with one hand. For example, the opposite hinge sides of both flanges are overlapped with each other, and the flanges overlapped with each other are rotated in opposite directions. Easy to close,
It is packaged, and the certainty of maintaining the closed state and the sealing performance are further improved.

[0037]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described more specifically with reference to the representative examples shown in the drawings, but the present invention is not limited to these embodiments. The drawings are schematically described to explain the present invention, and the dimensions and the like are not accurately represented. Have been.

FIGS. 1 to 5 show an embodiment of the fitted packaging container of the first invention, that is, one embodiment of the inner fitted packaging container.
FIGS. 1, 2 and 3 are respectively a perspective view, a side view and a cross-sectional view of the inner fitting packaging container of the first invention in an open state (the first invention shown in FIG. 1). 4 is a sectional view taken along line AA of the inner fitting packaging container of FIG.
FIG. 2 is a side view and a cross-sectional view of the inner fitting packaging container of the first invention in a closed state, respectively. FIG. 6 is an enlarged cross-sectional view of a hinge section in a state where the container is opened (a cross section cut perpendicular to the long axis direction of the hinge, the same applies hereinafter) for showing details of various hinges.

The fitting packaging container shown in FIGS.
It is made of thin polyethylene terephthalate having a wall thickness of about 0.3 mm and comprises a lid 1, a container body 2, and a hinge 3 for connecting both the lid 1 and the container body 2. Each of the lid 1 and the container body 2 has an inverted quadrangular pyramid shape (open state) in which the shape of each bottom surface and each opening is a substantially rectangular shape with a rounded apex angle, The size of the opening is about 95 mm × about 135 mm.

A projection 12 having a substantially trapezoidal cross section is provided continuously around the periphery of the opening 11 of the cover 1 so as to surround the outside. An outer peripheral wall 121 extends from the outer peripheral edge of the projection 12 toward the bottom of the lid 1. The portion corresponding to the bottom of the projection 12 is the top 122 of the projection 12. A flange 13 is provided to extend outward from the edge of the outer peripheral wall 121. A flange 23 is provided on the periphery of the opening 21 of the container body 2 so as to extend outward.

The upper part of the peripheral wall 24 of the container main body 2 is made to protrude outward from the container main body 2, and the lower part of the peripheral wall 24 of the container main body 2 is made to fall into the inside of the container main body 2, and A protrusion is provided. The upper surface of this protrusion is substantially parallel to the bottom surface of the container body 2, and this upper surface is
It is two. In addition, the height of the projection 12 of the lid on the hinge side is set to be about 2 mm larger than the distance from the periphery of the opening 21 of the container body 2 to the shelf 242 at the corresponding location. When the container is closed, the shelf 242 holds the protrusion 12 of the lid 1.
Abuts the top 122 of the container body
The projections 12 of the lid 1 fitted in 2 are received and supported, and thus the lid 1 is received.

Thus, the lid 1 and the container body 2 are connected to each other by the hinges 3 via the respective flanges 13 and 23 on the respective long sides. Hinge 3
As shown in FIG. 6 (C), has a substantially U-shaped cross section, and has three surfaces. Among these three surfaces, the left side in the drawing is the lid side hinge portion 31, the right side in the drawing is the container body side hinge portion 32, and the center of the drawing is the center band 34. The center line of the width of the center band 34 is the hinge. It corresponds to the tip 33. The free ends (sides opposite to the central band) of the hinge part 31 on the lid body side and the hinge part 32 on the container body side of the hinge 3 are joined ends 311 and 321, respectively, and the flange 13 of the lid body and the container body It is joined to the flange 23.

In this hinge 3, the effective width m on the lid side (the width of the hinge part 31 on the lid side) is smaller than the effective width n on the container body side (the width of the hinge part 32 on the container body side). The width w of the central band 34 corresponds to the width of the hinge. further,
The width w of the central band 34 of the hinge 3 is slightly larger than the sum of the effective width m of the hinge on the lid side and the effective width n on the container body side. Further, a ridge 35 having a semicircular cross-section end face is provided so as to protrude outward from a protruding end which is a center line of the central band 34 of the hinge 3 in the long axis direction.

The fitted packaging container is bent from the hinge 3, and the lid 1 and the container body 2 are connected to the respective openings 11, 21.
Are pressed against each other and the container is closed. At this time, the surface of the outer peripheral wall 121 of the projection 12 of the lid 1 is
The projection 12 of the lid 1 is fitted into the interior of the container body 2 by being brought into contact with the inner peripheral surface of the upper part of the peripheral wall 24 including the peripheral edge of the eleventh.

The surface of the outer peripheral wall 121 of the projection 12 of the lid 1
A continuous groove 1211 of the book is provided as a fitting depression. On the other hand, at a portion of the upper part of the peripheral wall 24 of the container body 2 that overlaps with the outer peripheral surface of the outer peripheral wall 121 of the projection 12 of the lid 1 when the container is closed, one continuous ridge 241 is formed.
Are provided as fitting projections. This groove 1211 and ridge
241 are substantially parallel to the bottom surface of the lid 1 and the bottom surface of the container body 2, respectively. This groove 1211 and ridge
241 is fitted to each other when the container is closed, and reliably keeps the container closed.

The two short sides of the flange 13 contacting the hinge 3 of the lid 1 are each connected to the joint end 311 by 辺 of this short side.
Steps are provided at a distance from each other. That is, on the short side of the flange 13 of the lid 1, both the hinge side 131 and the anti-hinge side 132 are substantially flat surfaces, and
They are connected to each other via a connection unit 133. The connection portion 133 is a flat surface oblique to the flange 13. Thus, on each short side of the flange 13, the hinge side 131 is closer to the bottom surface of the lid 1 than the opposite hinge side 132, and a step is formed between the hinge side 131 and the opposite hinge side 132. ing. As a result, the height of the protrusion 12 of the lid 1 is bulged toward the bottom of the lid 1 by an amount corresponding to the step corresponding to the step on the hinge side 131.

In the fitted packaging container in the closed state, a gap having a maximum height of about 3 mm is formed as a step on the hinge side on the overlapping surface of the two flanges, while the gap is formed on the anti-hinge side. It is not substantially formed and the surfaces of the flanges are in contact with each other. In the open-fitting packaging container, the hinge side 131 of the flange 13 is substantially flat as described above, but the container is made of a thin synthetic resin and has high elasticity and flexibility. From that,
When the container is closed, the non-hinge side 132 of the flange 13 is slightly curved outward. As a result, the shape of the gap may be as shown in FIG. 8C described later.

The flange 23 of the container body 2 is located on the opposite side of the hinge 23.
One of the two corners 234, 234 is cut off, and when the container is closed, only the flange 13 of the lid 1 is provided at this portion, where many small irregularities are provided as a non-slip. However, the slip stopper is not shown.

Each of the flange 13 of the lid 1 and the flange 23 of the container body 2 is provided with a groove 135 and a protrusion 235 which are fitted to each other when the container is closed. Thus, the groove 135 is slightly spaced from the edge of the outer peripheral wall 121 of the projection 12 of the lid, and is provided on the long side and both short sides on the side opposite to the hinge. Ridge 235 is the container body
The second opening 21 is provided slightly apart from the peripheral edge of the opening 21 at a position corresponding to the above-mentioned groove 135. This groove 135
The closed state of the fitted packaging container is more reliably maintained by fitting the ridge 235 with the ridge 235.

FIGS. 6A, 6B and 6C show the fitting package according to the first aspect of the present invention in which the lid and the container main body are both placed on a substantially horizontal surface and are open. 2 shows a cross section of the hinge 3 of the container. (A), (B) and (C) of FIG.
In the cross-sectional shape of the hinge 3, the semi-circular arc, the apex angle are rounded, and the sides are substantially V-shaped and the apex angle is a curve with a small degree of outward curvature, and the apex angle is rounded. It has a substantially U-shape. Hinge 3
And a hinge 33 on the lid side and a hinge 32 on the container body side. However, in (C), the central belt
The center line of the long axis direction of the 34 is the tip 33. Then
When the container is opened, the hinge 33 has a hinge 3 when the lid 1 and the container body 2 are substantially horizontal.
Of these, it is the portion that protrudes most outward. However, in (C), the central band 34 itself is the portion of the hinge 3 that protrudes most outward. Hinge 3 tongue 33
Is provided with a ridge 35 protruding outward along the nose 33.

Thus, in the hinge 3, the free end of the hinge portion 31 on the lid side (the end opposite to the protruding end or the center band, and so on) and the free end of the hinge portion 32 on the container body side are respectively connected to the lid. Joint ends 311 and 321 joined to the flange 13 and the flange of the container body 23, respectively.
It has been. The width w of hinge 3 is
And the distance between the joint end 321 and the horizontal distance between the two joint ends. For example, in (A), the joint end 311 and the joint end in a line segment parallel to the tangent s of the hinge tip 33 are shown. 321, the joint end 311 and the joint end 321 in a line segment parallel to the perpendicular t of the bisector of the apex angle in FIG.
And (C) the width of the central band 34.

Note that the effective width m of the hinge 3 on the lid side and the effective width n of the container body side are from the protruding end 33 of the hinge 3 to the joint end.
The vertical distances to 311 and 321 respectively. That is, in the fitted packaging container in the open state, the effective widths m and n are respectively different from the tangent s from the tangent s at the protruding end 33 of the hinge 3 to the joining ends 311 and 321 of the hinges in FIG. The length of the vertical line of
The length of each perpendicular to the tangent t from the perpendicular t of the bisector of the apex angle at the tip 33 to the joint ends 311 and 321 of the hinges. Also, the hinge shown in (C)
In 3, the width m of the hinge portion 31 on the lid side and the width n of the hinge portion 32 of the container body are set.

The effective width n of the hinge 3 on the container body side is wider than the effective width m on the lid side, and the difference (nm) is about 約 of the width w of the hinge 3. In the hinge 3 shown in (C), the width of the central band 34 corresponds to the width w of the hinge 3, and the sum of the effective width m of the hinge 3 on the lid side and the effective width n on the container body side. Is slightly larger than Also, the shape of the cross-section end face of the ridge 35 provided on the protruding end 33 of the hinge 3 is substantially a U-shape with a rounded apex angle in (A) and a substantially U-shape with a rounded apex angle in (B). V-shaped,
In (C), it is a semicircular arc.

FIGS. 7 to 9 show the gaps formed on the overlapping surfaces of the flanges 13 and 23 due to the provision of steps on the flange 13 of the lid 1 and / or the flange 23 of the container body 2. FIG. 2 is a partially enlarged view of an overlapping portion between both flanges on a side surface of the inner fitting packaging container according to the first invention for schematically showing a shape of the inner fitting packaging container. That is, FIGS. 7, 8 and 9 show the shape of the gap when both the flange 13 of the lid 1 and the flange 23 of the container main body 2 are provided with a step, respectively, and show only the flange 13 of the lid 1. Shape of gap when step is provided and flange 23 of container body 2
The shape of the gap when only a step is provided is shown.

7 to 9, the connection portion 13
3,233 is flange 1 in each of (A) and (B)
It is a plane oblique to the surface of 3, 23,
In (C), the surface is inclined with respect to the surfaces of the flanges 13 and 23, and the curved surface is curved outward with a small degree of curvature. Further, in (A) and (C), the two flanges are made closer to each other at the respective joint ends 311 and 321, and in (B), the two flanges are separated from each other at the joint ends 311 and 321, and the interval between them is maximized. I have. 7A, 7B and 7C, both flanges
The position of the connection and the height of the formed gap in each of 13 and 23 are substantially equal to each other.

In each of FIGS. 7A and 7C, the shape of the gap between the overlapping surfaces of both flanges 13 and 23 is substantially symmetric with the overlapping surface of both flanges 13 and 23 as the axis of symmetry. The overlapping surfaces of the flanges 13 and 23 approached to each other at the joint ends 311 and 321,
This distance is gradually increased as the distance goes to the right (as viewed in the drawing), reaches a maximum at the hinge-side ends of the connecting portions 133 and 233, and then further moves away from both the joint ends 311 and 321. This distance is reduced according to the gradient of the connecting parts 133, 233, and at the end of the connecting parts 133, 233 on the side opposite to the hinge, this distance is made substantially zero, and the surfaces of the flanges 13, 23 are brought into substantially contact with each other. Further, the shape of the flanges 13 and 23 as they reach the edges on the side opposite to the hinges-an arrowhead shape-.

In FIG. 7B, both flanges 13, 23
Although the shape of the gap at the overlapping surface of the two is almost symmetric with the overlapping surface of both flanges 13 and 23 as the axis of symmetry,
At 311,321, the distance between the overlapping surfaces of the flanges 13, 23 is maximized, and the maximum distance is maintained up to the hinge-side end of the connection portion 133, 233. After that, as the hinge portion further moves away, this distance becomes longer. The distance between the flanges 13 and 23 is substantially reduced to zero at the end on the opposite hinge side of the connection portions 133 and 233, and the surfaces of the flanges 13 and 23 are substantially brought into contact with each other. The shape reaching the edge of the flange on the side opposite to the hinge side-chisel shape-. Also, in FIG. 7 (D), the connecting portions at both flanges 13 and 23 are shown.
Except that the positions of 133 and 233 are different from each other, there is essentially no difference from FIG. 7C.

The shape of the gap in the overlapping surface of the flanges 13 and 23 in FIG. 8 corresponds to the upper half (in the drawing) of each gap in FIG. The shape of the gap in the overlapping surface of both flanges 13 and 23 in FIG. 9 corresponds to the lower half (in the drawing) of the shape of each gap in FIG.

FIGS. 10 to 13 show one embodiment of the fitted packaging container of the second invention, that is, the outer fitted packaging container. FIGS. 10, 11 and 12 are perspective views of the outer fitting packaging container of the second invention in the open state, respectively, of the outer fitting packaging container of the second invention shown in FIG. It is a cross-sectional view (BB cross-sectional view) and a cross-sectional view of the outer fitting packaging container of the second invention in a closed state.

In this outer fitting packaging container, the inner fitting packaging container of the first invention shown in FIGS. 1 to 5 is turned upside down so that the lid and the container main body are respectively connected to the container main body and the lid. It corresponds to the container which was done. It comprises a container body 4 and a lid 5 and a hinge 6 for connecting the container body 4 and the lid 5 to each other. A projection 42 is provided outside the periphery of the opening 41 of the container body 4. An outer peripheral wall 421 is extended from the outer peripheral edge of the projection 42 toward the bottom of the container body 4.
Is provided with a groove 4211, and a portion of the projection 42 connected to the opening 41 of the container body 4 is a top 422. Protrusion 42
The flange 4 is extended outward from the edge of the outer peripheral wall 421 of the
Three are provided.

A flange 53 is provided on the periphery of the opening 51 of the lid 5 so as to extend outward. The flange 43 of the container body 4 and the flange 53 of the lid 5 are overlapped with each other when the container is closed. Further, the upper portion of the peripheral wall 54 including the peripheral edge of the opening 51 of the lid 5 is overlapped with the outer peripheral wall 421 of the projection 42 of the container body 4 fitted into the opening 51 of the lid 5 when the container is closed. Outer peripheral wall 42 of projection 42 of lid 4 when container is closed
At the upper part of the peripheral wall 54 of the container body 5 that is overlapped with 1, a ridge 541 that fits into the groove 4211 of the outer peripheral wall 421 is provided.

The upper part of the peripheral wall 54 of the lid 5 is made to protrude outward from the lid 5, and the lower part of the peripheral wall 54 of the lid 5 is made to fall into the inside of the lid 5 and protrudes into the lid 5. Part is provided. The upper surface of the projecting portion is substantially parallel to the bottom surface of the container body, and the upper surface is a shelf 542. The shelf 542 is brought into contact with the top 422 of the projection 42 of the container body 4 when the container is closed.

FIG. 13 is a partially enlarged view of the overlapped portion between the two flanges on the side surface of the outer fitting packaging container of the second invention, and corresponds to FIG. That is, the connection portion 433 is provided on the flange 43 connected to the hinge 6 of the container
The flange 43 is divided into a hinge side 431 and a non-hinge side 432 by this connection portion. Also, a ridge 66 is provided to protrude outward along the tip of the hinge 6, and the ridge 66 to the joint end 641 and the ridge 66 to the joint end 651 are respectively provided on the hinge and lid sides of the container body. Hinge part.

In the outer fitting packaging container according to the second aspect of the present invention shown in FIG. 13, the length of the connecting portion 433 is equal to that of the connecting portion 233 provided on the flange 23 of the inner fitting packaging container shown in FIG. 9 except that the effective width n of the hinge 6 on the container body side is smaller than the effective width m of the hinge 6 on the lid body side. Is essentially no different. As in each of FIGS. 7 and 8, a step can be formed in both the flange of the lid and the flange of the container body.
A step may be provided only on the flange of the container body.

In the fitting packaging container of the present invention shown in these embodiments, the flange of the lid body and the flange of the container body, which are overlapped with each other, are overlapped with each other, and both ends of the long side opposite to the hinge side. By holding the part between both hands at the same time, or holding down the bottom of the lid with one hand,
It is easily closed and packaged in one operation, and the anti-hinge sides of both flanges are overlapped with each other, and the overlapped flanges are passed through the gap between the rings which are rotated in opposite directions to each other. Closed and packaged.

[0066]

According to the present invention, the fitting and packaging container of the present invention requires only one operation for closing and packaging, and the automation of the container closing is simplified, so that the labor in the packaging operation is greatly reduced and the required time is reduced. Is greatly shortened, packaging is performed efficiently, and the reliability of holding the closed state is further improved, so that once closed, the lid can be left alone while it is left A fitting packaging container which does not open and further improves the tightness of the fitting packaging container.

[Brief description of the drawings]

FIG. 1 is a perspective view of an embodiment of the inner fitting packaging container of the first invention in an open state.

FIG. 2 is a side view of the inner fitting packaging container of the first invention shown in FIG.

FIG. 3 is a cross-sectional view (AA cross-sectional view) of the inner fitting packaging container of the first invention shown in FIG.

FIG. 4 is a side view of the inner fitting packaging container of the first invention shown in FIG. 1 in a closed state.

FIG. 5 is a cross-sectional view of the inner fitting packaging container of the first invention shown in FIG. 1 in a closed state.

FIG. 6 is an enlarged cross-sectional view of the hinge portion in the open state of the container for showing details of the hinge of the internally fitted container according to the first invention.

FIG. 7 is a partially enlarged view of the overlapping portion between the two flanges on the side surface of the inner fitting packaging container of the first invention in which steps are formed in both the flange of the lid and the flange of the container body.

FIG. 8 is a partially enlarged view of the overlapped portion between the two flanges on the side surface of the fitted packaging container of the first invention in which a step is formed only in the flange of the lid.

FIG. 9 is a partially enlarged view of the overlapping portion between the two flanges on the side surface of the inner fitting packaging container of the first invention in which a step is formed only in the flange of the container body.

FIG. 10 is a perspective view of an embodiment of the outer fitting packaging container according to the second invention in an open state.

11 is a cross-sectional view (a cross-sectional view taken along the line BB) of the outer fitting packaging container of the second invention shown in FIG.

12 is a cross-sectional view of the outer fitting packaging container of the second invention shown in FIG. 10 in a closed state.

FIG. 13 is a partially enlarged view of an overlapped portion between both flanges on the side surface of the outer fitting packaging container of the second invention in which a step is formed only in the flange of the container body.

[Explanation of symbols]

 1 Lid 11 Opening 12 Projection 121 Outer wall 122 Top 1211 Groove 13 Flange 131 Flange hinge side 132 Flange anti-hinge side 133 Connection part 135 Groove 2 Container body 21 Opening 23 Flange 231 Flange hinge side 232 Flange opposite Hinge side 233 Connection part 234 Corner 235 Protrusion 24 Peripheral wall 241 Protrusion 242 Shelf 3 Hinge 31 Lid part on lid side 311 Joining end 32 Hinge part on container body side 321 Joining end 33 Hinge tip 34 Central band 35 Protrusion Article 4 Container body 41 Opening 42 Projection 421 Outer peripheral wall 4211 Groove 422 Top 43 Flange 431 Flange hinge side 432 Flange non-hinge side 433 Connection part 5 Cover 51 Opening 53 Flange 54 Peripheral wall 541 Protrusion 542 Shelf 6 Hinge 63 Tip 641 Joint end 651 Joint end 66 Ridge m Effective width of lid on lid side n Effective width of hinge on container body side t Perpendicular line of bisector of apex angle s Tangent line w Width of hinge

Claims (10)

[Claims] 1. A lid and a container body each made of a thin synthetic resin, and a hinge for connecting the lid and the container body, and a projection is provided outside a peripheral edge of an opening of the lid. Has an outer peripheral wall extending toward the bottom of the lid, a flange extending outward from the outer peripheral wall edge of the projection, and a flange provided on the outer peripheral edge of the opening of the container body. A flange is provided extending outward, and
The flange of the lid and the flange of the container body are overlapped with each other when the container is closed, and the upper part of the peripheral wall including the opening peripheral edge of the container body is fitted into the opening of the container body when the container is closed. The container main body is provided in contact with the outer peripheral wall of the projection of the lid, the effective width of the hinge on the container body side is made larger than the effective width of the hinge on the lid body side, and a ridge is provided along the protruding end of the hinge. A fitting packaging container, characterized in that a shelf which is brought into contact with the top of the projection of the lid when the container is closed is provided on an upper portion of the peripheral wall so that the peripheral wall of the container body projects outward. 2. An overlapping portion between the outer peripheral wall of the projection of the lid and the outer peripheral wall of the projection of the lid of the peripheral wall of the container body,
2. The fitted packaging container according to claim 1, further comprising a fitting projection or a fitting depression fitted into each other when the container is closed. 3. A fitting projection or fitting depression provided on the outer peripheral wall of the projection of the lid body and a fitting depression or fitting projection provided on the upper part of the peripheral wall of the container body are respectively provided on the lid body and the container body. 3. An intermittent or continuous protruding ridge or groove parallel to the bottom surface of the member.
The fitted packaging container according to the above. 4. A container comprising: a lid made of a thin synthetic resin; a container main body; and a hinge for connecting the lid to the container main body, wherein a projection is provided outside a peripheral edge of an opening of the container main body. An outer peripheral wall is extended toward the bottom of the container body at an outer peripheral edge of the outer peripheral wall, and a flange is provided extending outward from an outer peripheral edge of the outer peripheral wall of the projection, and a flange is provided. A flange is provided so as to extend outward, and the flange of the container body and the flange of the lid are overlapped with each other when the container is closed, and the upper part of the peripheral wall including the opening peripheral edge of the lid is the container. When closed, it is brought into contact with the outer peripheral wall of the projection of the container main body fitted into the opening of the lid, the effective width of the hinge on the container main body side is smaller than the effective width of the hinge on the lid main body side, and A ridge is provided along the tip of the hinge. A fitting part provided on the upper part of the peripheral wall of the lid body, the shelf part being brought into contact with the top of the projection of the container body when the container is closed, with the peripheral wall of the lid body projecting outward. container. 5. A fitting projection or a fitting depression which is fitted to each other when the container is closed at respective overlapping portions of the outer peripheral wall of the projection of the container main body and the outer peripheral wall of the projection of the container main body at the peripheral wall of the lid. The fitted packaging container according to claim 4, which is provided. 6. The fitting projection or the fitting depression provided on the outer peripheral wall of the projection of the container main body and the fitting depression or the fitting projection provided on the upper part of the peripheral wall of the container main body are respectively formed by the container main body and the lid. The fitted packaging container according to claim 4 or 5, which is an intermittent or continuous ridge and groove parallel to a bottom surface of the container. 7. The fitted packaging container according to claim 1, wherein a step is formed on the flange of the lid and / or the flange of the container body near the hinge on the side connected to the hinge. 8. Each of the flange of the lid and the flange of the container main body, at least along the side opposite to the hinge side,
The fitted packaging container according to any one of claims 1 to 7, further comprising a fitting projection or a fitting depression which is fitted to each other when the container is closed. 9. A fitting depression or fitting projection provided on each of the flange of the lid and the flange of the container body,
9. The fitted packaging container according to claim 8, which is an intermittent or continuous ridge and groove. 10. The fitted packaging container according to claim 1, wherein the bottom surface and the opening of each of the container body and the lid are substantially square.