JPH09226769A - Externally fitting-sealing type packaging container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging container which is an externally fitting-sealing type when a lid is fitted on a container main body, and wherein for both the container main body and the lid, the volume does not become bulky when a plurality of them are stacked. SOLUTION: This packaging container comprises of a container main body 1 and a lid 11 made of a synthetic resin sheet, and for the container main body, at an upper part of the peripheral wall surface 3, a container upper edge part 4, and a container hanging part which expands to the outside as becoming lower, are continuously formed in order, extending to total periphery of the paripheral wall surface 3. Also, at an intermediate location in the width direction of the container hanging part, a container recess-form ring 6 is formed, and for the lid 11, on the peripheral edge part of the lid 11, a lid upper edge part 14, a lid hanging part, and a lid hanging part which expands to the outside as becoming lower, are continuously formed in order. Then, at an intermediate location in the width direction of the lid hanging part, a lid recess-form ring 16 which is fitted on the container recess-form ring 6, is formed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outer fitting and sealing type packaging container. More specifically, it is a packaging container comprising a container body made of a synthetic resin sheet and a lid, and the outer fitting and sealing can reduce the volume when a large number of container bodies and lids are stacked (stacked). Mold packaging container.

[0002]

2. Description of the Related Art Conventionally, a synthetic resin sheet is formed by a pressure forming method,
It is widely used in various fields because it can be easily formed into a shape suitable for the purpose by a differential pressure forming method such as a vacuum forming method and a vacuum / pressure forming method. For example, dish-shaped, box-shaped (including not only rectangular and square planes, but also those with partitions and supports on the bottom wall, etc.), cups, tubes, inverted truncated cones, inverted truncated pyramids, etc. There are various shapes, and the shape, size, design, etc. are selected according to the purpose of use.

With respect to the box-shaped container, Jikkou 55-5
As described in JP-A-6135, a structure in which the container body and the lid are not connected,
As described in Japanese Unexamined Patent Publication No. 20, a container having a structure in which a container main body and a lid are connected by a hinge has been proposed. When storing and transporting these containers after molding (manufacturing), many containers are stacked (stacked) and stored in cardboard or other containers, but there is a problem that the volume at this time is bulky.

That is, the container described in Japanese Utility Model Publication No. 55-56135 is a container having a structure in which a lid is externally fitted to a container main body, and is preferably used when the lid is externally fitted to the container main body. Although sealed, when storing and transporting after molding (manufacturing), it is undeniable that both the container body and the lid become bulky when a large number of them are stacked. As a container capable of accurately stacking a large number of containers, a container described in Japanese Utility Model Publication No. 56-9629 has been proposed, but the structure is not a sealed type when a lid is fitted to the container body. In addition, Shokai 5
Although the container body and the lid body described in JP-A 4-46620 have a structure in which they are connected by a hinge portion, it is a container in which a large number can be accurately stacked, but the lid body is fitted to the container body. It is not a sealed structure.

[0005]

SUMMARY OF THE INVENTION In such a situation, the present invention provides a container body and a lid which are not bulky even if a large number of them are stacked and when the container body and the lid are fitted together. The present invention has been completed as a result of extensive studies for the purpose of providing a packaging container of an outer fitting and sealing type.

[0006]

In order to solve the above-mentioned problems, the present invention provides an outer fitting and sealing type packaging container comprising a container body made of a synthetic resin sheet and a lid.
The container main body is provided with an inverted frustum-shaped article storage portion formed by the lower wall surface and the peripheral wall surface, and the container upper edge portion extends over the entire circumference of the opening, and extends outward as it goes downward, and in the width direction. On the way, a container hanging part in which a container concave ring is formed is sequentially connected to form a frustum-shaped flange portion, and the lid body is
The upper wall surface and the upper edge of the lid that is connected to the upper wall, and the lid that protrudes outward as it goes downward, and that has the lid hanging part that has a lid concave ring formed in the middle in the width direction, is sequentially attached. Provided is a packaging container of an outer fitting hermetic type, characterized in that a joint portion is formed.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings, but the present invention is not limited to the following description unless it exceeds the gist. FIG. 1 is an example of an outer fitting and sealing type packaging container according to the present invention, and is a vertical cross-sectional view of a state in which a lid is fitted in an opening of a container body. FIG. 2 is a partially enlarged vertical sectional view showing a state in which a plurality of container bodies shown in FIG. 1 are stacked. FIG. 3 is a partially enlarged vertical sectional view showing a state in which a plurality of lids shown in FIG. 1 are stacked.

Outer-fitting and sealing-type container body 1 according to the present invention
Is basically in the shape of an inverted frustum, and is basically a structure in which an article storage portion is formed by the bottom wall surface 2 and the peripheral wall surface 3. The shape of the inverted frustum that forms the article storage unit may be a polygon such as a triangle or a square, or a circle, an ellipse, an oval, or the like. In the case of a polygon, each apex may have a rounded shape.
The container main body preferably has a substantially rectangular shape among these shapes. The height of the peripheral wall surface 3 of the container body can be selected depending on the use of the packaging container.

At the upper part of the peripheral wall surface 3, the container upper edge portion 4 extends over the entire circumference of the peripheral wall surface, and the container protrudes outward as it goes downward, and a container concave ring 6 is formed in the middle in the width direction. The container hanging parts 5 (5a, 5b) are successively connected to form a frustum-shaped flange portion in cross section. The container upper edge portion 4 is a step portion which extends outward so that the uppermost portion thereof forms a plane, is formed to have a substantially constant width, and is formed in a shape similar to the shape of the inverted frustum, It is arranged in a positional relationship of mutual contact with the lid upper edge portion 14 described later. The flange portion having a frustum-shaped cross section cut at right angles to the extending direction (hereinafter, may be simply referred to as a frustum-shaped flange portion) exerts a repulsive force even when torsional stress is applied to the packaging container. , Functions so that the peripheral wall surface 3 is not damaged.

Here, "the uppermost portion forms a flat surface" of the container upper edge portion 4 means that there is no gap when the uppermost portion is placed on a flat plate, and this flat surface has a bottom wall surface 2. It is preferable that they are parallel to each other, but they may not be parallel to each other. The uppermost portion of the container upper edge portion 4 is preferably a flat surface having a constant width, but the cross section cut at a right angle to the extending direction may have an arc shape. In the present invention, “outward” means an outward direction away from the central axis of the inverted frustum-shaped container body.

The container upper edge 4 projects outward as it goes downward, and has a container concave ring 6 in the middle in the width direction.
The container hanging parts 5 (5a, 5b) in which are formed are sequentially connected to form. A frustum-shaped flange portion is formed by the container upper edge portion 4 and the container hanging portion 5 (5a, 5b) which are formed by being connected to each other.

The container hanging part 5 has a constant width and is formed all around the container body. This width can be variously changed depending on the size of the packaging container and the use, but it is 2 times the height of the peripheral wall surface 3.
It is preferable to select within one-half. Container hanging part 5 (5a,
5b) in the width direction (direction from the container upper edge 4 to the lower end), preferably above the center in the width direction, the container concave ring 6
To form The height when stacking the containers (stacking height) depends on the heights of the container upper edge 4 and the lower surface of the container concave ring 6, so that the container concave ring 6 can be
It is preferably provided close to the side.

The container concave ring 6 holds the container upper edge 4 of the lower container when stacking the container bodies, and when the container body is closed with a lid, the container concave ring 6 will be described later. Performs the function of fitting 16. The container concave ring 6 is formed as a concave groove or a concave portion. The concave groove is preferably formed over the entire circumference of the container main body, but it is also possible to arrange the concave portions at regular intervals in a dotted manner over the entire circumference of the container main body. The concave groove or the concave portion has a structure recessed toward the peripheral wall 3 when viewed from the outside of the container hanging portion 5 (5a, 5b), and a structure protruding toward the peripheral wall 3 when viewed from the inside.

The size of the concave groove or concave portion satisfies m <n, where m is the gap from the top of the concave groove or concave portion to the peripheral wall surface 3 and n is the maximum width of the upper edge 4 of the container. (See FIG. 2). When the relationship of m <n is satisfied, the container upper edge 4 of the container body disposed below is
It can be held between the top of the groove or the recess of the container body arranged above and the peripheral wall surface 3 (see FIG. 2). The relationship between the maximum width n of the container upper edge 4, the minimum gap m, and the thickness t of the synthetic resin sheet is m + 3 × t ≦ n ≦ m + 10 × t.
It is preferable to select so as to satisfy. When the relationship between n and m is such that the above equation is satisfied, the container upper edge 4 does not fit between the top of the groove or the recess and the peripheral wall surface 3 and the container at the bottom of the container This is preferable because it is not necessary to increase the outward projection angle of the lower portion 5b of the concave ring 6 and it can be made moderate.

The container hanging part 5 (5a, 5b) may be formed to have a structure that (i) projects outward from the container upper edge part 4 downward, or (ii) the width of the container hanging part 5 Part 5 up to the upper side of the container concave ring 6 formed in the middle of the direction
a is formed substantially vertically, and the lower part 5b of the container concave ring 6 is formed.
May be formed so as to protrude outward as it goes down. In the latter case (ii), it is preferable that the width of the portion 5a and the width of the portion 5b be in a relationship of 5a <5b.
When the width of the portion 5b is increased, even if several other container bodies are stacked and mounted, the container body is hardly collapsed and has stability, which is preferable.

The container hanging part 5 (5a, 5b) has a structure in which it projects outward as it goes downward. The angle of the outward projection depends on the size of the container upper edge 4 of the container body. Although it depends, 10 to the hanging surface from the container upper edge 4
It is preferable to select within a range of 45 °. If the outward projection angle is selected within the above range, when stacking (stacking) containers, the maximum width of the container upper edge 4 does not reach the container concave ring 6 and the container hanging portions 5 (5a, 5b) And peripheral wall 3
In the middle of the package, the bulk of the volume can be reduced, and a fitting and sealing type packaging container can be obtained.

The lid body has a function of sealing the container body by fitting the lid body outside the frustum-shaped flange portion provided in the opening of the container body from the upper side of the container body. Therefore, the shape of the outer fitting portion of the lid is selected according to the shape of the flange portion of the container body. The outer fitting portion of the lid body 11 has an upper wall surface 12 and an upper edge portion 14 of the lid body which is connected to the upper wall surface 12 and projects outward as it goes down, and in the middle of the width direction, a lid body concave ring 16 is formed.
It is constituted by the lid hanging part 15 (15a, 15b) in which is formed.

As shown in FIG. 1, the lid 11 may have a frustum shape in which a lid peripheral wall surface 13 is formed corresponding to the article storage portion of the container body and an upper wall surface 12 is connected to the lid peripheral wall surface 13. The combination can be changed depending on the use of the packaging container, such as a dome shape and a flat shape. The lid upper edge 14 connected to the peripheral wall surface 13 contacts the container upper edge 14, and the lid hanging part 15 (15a, 15b) is connected to the container hanging part 5 (5a, 5a, 5b).
In contact with b), the lid concave ring 16 fits into the container concave ring 6, and these together strengthen the fitting of the container body to the lid, improving the sealing property of the packaging container, and at the same time, Even if a torsional stress is applied to the packaging container, it exerts a repulsive force and functions so as not to damage the peripheral wall surface 3.

The inside surface of the hanging portion 15 (15a, 15b) of the lid is brought into surface contact with the outside surface of the hanging portion 5 (5a, 5b) of the container over the entire circumference of the container. Therefore, when the container hanging part 5 is formed so as to (i) extend outward from the container upper edge part 4 downward, the lid hanging part 15 is also formed in such a structure. Further, the container hanging part 5 is referred to as (ii) the container hanging part 5.
(5a, 5b) Container concave ring 6 formed in the middle of the width direction
When the portion 5a extending to the upper side of the container is formed substantially vertically, and the lower portion 5b of the container concave ring 6 is formed so as to protrude outward as it goes down, the lid hanging portions 15a, 1a
5b is also formed in such a structure. The outwardly projecting angle is preferably matched with the container hanging part 5 (5a, 5b) or slightly larger.

The lid concave ring 16 provided in the middle of the lid hanging part 15 (15a, 15b) in the width direction, when the lids are stacked, the lid upper edge 14 of the lower lid. When the container body is held (see FIG. 3) and the container body is closed by the lid, the container concave ring 6 is fitted (see FIG. 1).
When the container concave ring 6 is formed in a concave groove over the entire circumference of the container body, a convex ring protruding inward so as to fit in this groove or a convex portion having a point-like interval is used. May be arranged over the entire circumference of the lid. When the container concave ring 6 is arranged at regular intervals in the form of dot-like recesses over the entire circumference of the container body, the projections are arranged in a dot-like manner at intervals that fit into the recesses. .

FIG. 1 shows an example of a typical combination of the present invention, but the structure of the container body, the structure of the lid, the relationship between the container body and the lid, etc. can be variously changed. As for the container body, FIG. 1 shows an example in which the container upper edge 4 is provided above the peripheral wall 3, but the peripheral wall step is provided above the peripheral wall 3 and below the container upper edge 4. It may be provided. The bottom wall surface 2 and the peripheral wall surface 3 are provided with uneven reinforcing ribs, uneven patterns, characters, and the like as long as no inconvenience occurs when the container is molded (manufactured).
Signs can be engraved. Also for the lid, the shape of the upper wall surface 12 can be variously changed, and a concave-convex pattern, characters, symbols, and the like can be engraved within a range that does not cause inconvenience when the lid is molded (manufactured).

In FIG. 1, the container main body and the lid body are separated from each other, but the container main body and the lid body may be connected by a hinge portion. When the rectangular container body and the lid are connected by the hinge portion, it is preferable that the hinge portion is provided on the long side portion. Further, when the container body and the lid are connected by the hinge, it is necessary to slightly change the structure of the hinge so that the volume does not become large when the container body and the lid are stacked.

The outer fitting sealed type packaging container according to the present invention is
Molded (manufactured) from a synthetic resin sheet. Synthetic resin
There is no limitation on the type as long as it can be formed into a sheet and the obtained sheet can be formed by a differential pressure forming method such as a pressure forming method, a vacuum forming method, or a vacuum / pressure forming method. Specific examples of the synthetic resin include polyolefin resins such as polyethylene and polypropylene, polystyrene, styrene-acrylonitrile copolymer, high acrylonitrile copolymer, rubber-reinforced polystyrene, styrene resins such as ABS resin, polyvinyl chloride, vinyl chloride. -Vinyl chloride resin such as vinyl acetate copolymer, acrylic resin such as polymethylmethacrylate, polyester resin such as polyethylene terephthalate and polybutylene terephthalate, and other polyvinyl acetate, polyvinylidene chloride, polyvinyl alcohol, polyvinyl alcohol partial saponification Thing, polycarbonate, etc. are mentioned. Synthetic resin
It is not limited to these exemplified ones.

These synthetic resin sheets may be colored or non-colored, and may be transparent or opaque.
Further, both the container body and the lid may be transparent, one may be opaque, and one may be colorless and the other may be colored.

To use the outer-fitting and hermetically-sealed packaging container according to the present invention, articles are stored in the article storage portion of the container body, and the lid body is inserted from the upper side to the outside of the frustum-shaped flange portion of the container body. By covering and fitting, the container body can be sealed.
When the lid body is fitted over the outer side of the frustum-shaped flange portion and fitted, as shown in FIG. 1, the container upper edge portion 4, the lid body upper edge portion 14, and the container hanging portion 5 (5a, 5b). And the lid hanging part 15 (15a, 15b) contact with each other over the entire circumference of the container, and the concave ring 6 of the lid is fitted to the concave ring 6 of the container over the entire circumference of the container. By these interactions, the outer fitting sealing is achieved, and even when a torsional stress is applied to the packaging container, the packaging container exerts a repulsive force, thereby preventing the packaging container from being damaged.

To remove (open) the lid body fitted to the frustum-shaped flange portion of the container body, hold the container body with one hand, and hold the lid body with the other hand to transform the inside. Let's go out. In addition, when the tongue pieces are provided so as to face the container hanging portion 5b and the lid hanging portion 15b so as to face each other, the tongue pieces can be easily opened by grasping these tongue pieces with the fingertips and pulling the tongue pieces away from each other. it can. In addition, it is preferable that the tongue is provided with an uneven pattern so that the tongue does not slip when the finger is gripped and pulled. When the container main body and the lid are connected by the hinge portion, the tongue piece is provided at a position apart from the hinge portion.

There is no limitation on the articles to be housed in the outer fitting and hermetically sealed packaging container according to the present invention, and any articles may be used. Specific examples of items that can be stored include sandwiches, hot dogs, cakes, side dishes, pickles, fruits and vegetables,
Examples include foods such as various kinds of sushi and cooked rice, but the foods are not limited to these exemplified foods, and stationery, toys, and other articles may be used.

The outer fitting sealed type packaging container according to the present invention is
It has the following special advantageous effects and its industrial value is extremely high. 1. The outer fitting hermetically-sealed packaging container according to the present invention has a structure in which the container hanging parts (5a, 5b) forming the frustum-shaped flange portions are projected outward as the container downwards (5a, 5b). Manufacturing) and then storage,
During transportation, the volume does not become bulky even if a large number of container bodies and lids are stacked (stacked). Therefore, storage and transportation costs can be significantly reduced. 2. The outer fitting sealed type packaging container according to the present invention is a container hanging part 5
A container concave ring 6 is provided midway in the width direction of (5a, 5b),
Since the lid concave ring 16 is fitted to this, the lid can be fixed to the frustum-shaped flange portion of the packaging container to ensure the hermetic sealing. 3. The outer fitting hermetically sealed packaging container according to the present invention has a structure in which the container body and the lid body are connected to each other by the hinge portion, and even when the container body and the lid body are stacked (stacked) in large numbers. The volume is not bulky.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of an example of an outer fitting and sealing type packaging container according to the present invention in which a lid is fitted in an opening of a container body.

FIG. 2 is a partially enlarged vertical sectional view showing a state in which a plurality of container bodies shown in FIG. 1 are stacked.

FIG. 3 is a partially enlarged vertical sectional view showing a state in which a plurality of lids shown in FIG. 1 are stacked.

[Explanation of symbols]

 1: Container main body 2: Low wall surface 3: Circumferential wall surface 4: Upper edge part of container 5a: Upper part of container concave ring and container concave ring 5b: Lower part of container concave ring and container concave ring 6: Container Concave ring 11: Lid body 12: Upper wall surface 13: Lid peripheral wall surface 14: Lid upper edge 15a: Lid lower part and lid upper part of concave ring 15b: Lid lower part, lid Lower part of concave ring 16: concave ring of lid m: gap from top of container concave ring to peripheral wall surface n: maximum width of upper edge of container

Claims (4)

[Claims] 1. An outer-fitting and sealing-type packaging container comprising a synthetic resin sheet container body and a lid body, wherein the container body comprises:
An inverted frustum-shaped article storage portion is formed by the lower wall surface and the peripheral wall surface, and the container is surrounded by the upper edge of the container over the entire circumference of the opening, and protrudes outward toward the lower side, and in the middle of the width direction, the container is formed. The container hanging part in which the concave ring is formed is sequentially connected to form a flange portion having a frustum-shaped cross section, and the lid body has an upper wall surface and an upper edge portion of the lid body that is connected to the upper wall surface. An outer fitting sealing type characterized in that an outer fitting portion formed by sequentially connecting the hanging parts of the lid with a concave ring formed on the lid is formed in the middle in the width direction. Packaging container. 2. The container body has a structure in which the container hanging part hangs substantially vertically until reaching the container concave ring, and the part beyond the container concave ring projects outward as it goes downward. , The lid has a structure in which the hanging portion of the lid hangs substantially vertically until reaching the concave ring of the lid, and the portion beyond the concave ring of the lid bulges outward as it goes downward. The outer fitting hermetically sealed packaging container according to claim 1. 3. The angle at which the portion of the container body that extends beyond the container concave ring and the portion that extends beyond the lid concave ring is outward is
The outer fitting sealed type packaging container according to claim 2, wherein the packaging container is selected within a range of 10 to 30 ° with respect to a vertical line. 4. The outer fitting hermetically sealed packaging container according to claim 1, wherein the container body and the lid are connected by a hinge portion.