JPH10230954A - Packaging container of outside fitting and hermetically sealing and easily closable cover type - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a packaging container provided with an outside fitting and hermetically sealing and easily closable cover in which the container body and the cover body are connected to each other by a hinge and whose volume does not become bulky even when the many containers are stacked and in which the cover body can be easily put on the container body. SOLUTION: In a square container in plan view, in which the container body 1 made of a synthetic resin sheet and the cover body are connected by a hinge 17. The upper side edge 4 of the container, the extended-down part of the container, sticking outward as it goes down, and the horizontal collar 5c of the container are connected in sequence, at the whole peripheral wall face in the upper part of the wall face, in the container body 1. And a recessed ring of the container is formed in the breadthwise middle way of the extended-down part of the container. And the upper side edge 14 of the cover body, the extended-down part of the cover body, sticking outward as it goes down, and the horizontal collar of the cover body are connected in sequence at the peripheral part of the cover body, in the cover body. And a protruded ring of the cover body to fit to the recessed ring of the container is formed in the breadthwise middle way of the extended-down part of the cover body.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging container of an externally fitted sealing type and an easy closing type. More specifically, it is a packaging container made of a synthetic resin sheet and having a rectangular planar shape in which a container body and a lid are connected at a hinge portion, and a large number of container bodies and lids are stacked (stacked). The present invention relates to an outer-fitting sealed type that can reduce the volume at the time of packaging, and to a packaging container that can be easily closed.

[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.

[0003] In the case of a box-shaped container, Japanese Utility Model Publication No. 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 Patent Publication No. 20, a container having a structure in which a container 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
JP-A-4-46620 discloses a container having a structure in which the container body and the lid are connected to each other at a hinge portion, although it is possible to accurately stack a large number of them, but when the lid is fitted to the container body. The structure is not sealed. When closing a container having a structure in which the container body and the lid are connected by a hinge, the other corner is fitted with one corner as a fulcrum, and then the third corner is fitted. And finally, the remaining corners must be fitted, which has a disadvantage that the lid closing operation is complicated.

[0005]

SUMMARY OF THE INVENTION In such a situation, the present invention does not increase the volume of the container body and the lid even when a large number of them are stacked. The present invention has been completed as a result of intensive studies for the purpose of providing a packaging container which is an outer fitting and sealing type and which can easily be closed.

[0006]

In order to solve the above-mentioned problems, the present invention provides an externally fitted closed type and easy-closed type in which a container body made of a synthetic resin sheet and a lid are connected at a hinge portion. In a packaging container having a square planar shape, the container body is formed with an inverted frustum-shaped article storage portion with a lower wall surface and a peripheral wall surface,
The container upper edge portion extends over the entire periphery of the opening, and extends outward as it goes downward, and a container hanging portion having a container concave ring formed in the middle in the width direction, and a container flange horizontal extending outward. The parts are sequentially connected, and when the container is cut vertically, the cross section of the flange part forms a frustum shape as a whole, and the lid is an upper wall surface and a lid upper edge connected to the upper wall, a lower part. Outer fitting formed by sequentially connecting a lid hanging portion having a lid convex ring formed in the middle in the width direction and a lid flange horizontal portion extending outward in the width direction. The hinge portion is formed between the container flange horizontal portion and the lid flange horizontal portion, and when the container body and the lid are opened and placed horizontally, the lid flange horizontal portion is formed. Part is located above the container flange horizontal part, so that when the lid is closed, the lid flange horizontal part contacts each other when the container flange horizontal part overlaps Contact, and the two corners of the hinge portion side, one corner portion is fitted away from the hinge portion, the remaining 1
There is provided an outer fitting sealing type easy-closing type packaging container characterized in that the lid can be closed by pressing only at two corners.

[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 a packaging container of an outer fitting sealing type and an easy closing type according to the present invention, and is a longitudinal sectional view in a state where a lid is fitted into an opening of a container body. FIG. 2 is a partially enlarged longitudinal sectional view of a hinge portion when the container shown in FIG. 1 is opened and placed horizontally. FIG.
FIG. 4 is an enlarged vertical cross-sectional view of a container main body in a state where a plurality of containers shown in FIG. 1 are stacked, and FIG. 4 shows a plurality of container lids in a state where a plurality of containers shown in FIG. 1 are stacked. FIG. 4 is a partially enlarged longitudinal sectional view of a state in which pieces are stacked.

[0008] The container body 1 of the present invention, which is an externally fitted and sealed and easy-to-close type, has a truncated inverted pyramid shape, and has a structure in which an article storage portion is formed by a bottom wall surface 2 and a peripheral wall surface 3. I do. The shape of the inverted frustum forming the article storage portion is a quadrangular planar shape. 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 3, over the entire periphery of the peripheral wall, an upper edge portion 4 of the container extends outwardly as it goes downward, and a concave ring 6 of the container is formed in the middle in the width direction. The container hanging portion 5 (5a, 5b) and the container flange horizontal portion 5c are sequentially 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 cross section cut at right angles to the extending direction has a frustum-shaped flange
The flange portion may be simply a frustum-shaped portion), which exerts a repulsive force even when a torsional stress is applied to the packaging container, and functions so that the peripheral wall surface 3 is not damaged.

Here, "the uppermost portion of the container upper edge portion 4 forms a flat surface" means that there is no portion where a gap is formed when the uppermost portion is placed on a flat plate. Are preferably parallel to each other, but they need not be parallel. The uppermost portion of the container upper edge 4 is preferably a flat surface having a constant width, but the cross section cut at a right angle to the extending direction may be an arc. 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 part 5 (5a, 5b) in which the is formed and the container flange horizontal part 5c are sequentially connected and formed. The container upper edge portion 4, the container hanging portion 5 (5a, 5b) and the container flange horizontal portion 5c formed so as to form a frustum-shaped flange portion.

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

The container concave ring 6 holds the container upper edge portion 4 of the lower container when stacking the container main body, and when the lid is closed on the container main body, the lid concave ring 6 described later. 16 is fitted. 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 groove or the recess satisfies the relationship m <n, where m is the gap from the top of the groove or the recess to the peripheral wall 3 and n is the maximum width of the upper edge 4 of the container. (See FIG. 3). 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 recess of the container body arranged above and the peripheral wall surface 3 (see FIG. 3). 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 the following. 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.

A container flange horizontal portion 5c is formed at the lower end of the container hanging portion 5 (5a, 5b). The container flange horizontal portion 5c functions to prevent the container hanging portion 5 from being damaged. The container flange horizontal portion 5c may be formed to be parallel to the bottom wall surface 2 of the container main body, or is not strictly parallel, and is deformed so that a portion near the hinge is slightly lower than a portion away from the hinge. You can also. The width of the container flange horizontal portion 5c is preferably approximately equal to the width of the lid flange horizontal portion 15c described later. The container flange horizontal portion 5c is convenient for providing a tongue used when opening the container in a sealed state. When the tongue is provided, at least one of the corners away from the hinge portion is provided. It is preferred to provide.

The lid has a function of fitting the outer side of the frustum-shaped flange provided at the opening of the container body from above the container body to seal 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 11 has an upper wall surface 12 and an upper edge portion 14 of the lid connected to the upper wall surface 12.
Is formed by the lid hanging portion 15 (15a, 15b) formed with the cover and the lid flange horizontal portion 15c.

As shown in FIG. 1, the lid 11 may have a frustum shape in which a lid peripheral wall 13 is formed so as to correspond to the article storage portion of the container body and an upper wall 12 is formed in connection with the lid peripheral wall 13. The combination can be changed according to the use of the packaging container, such as a dome shape, a flat shape, and the like. The lid upper edge 14 connected to the peripheral wall surface 13 contacts the container upper edge 4, and the lid hanging part 15 (15 a, 15 b) holds the container hanging part 5 (5 a, 5 a).
b) and the container flange horizontal portion 5c, respectively, the lid convex ring 16 is fitted into the container concave ring 6, the container flange horizontal portion 5c approaches the lid flange horizontal portion 15c, and these are combined. To strengthen the fitting of the container body to the lid, enhance the sealing of the packaging container, and at the same time, exert a repulsive force even when a torsional stress is applied to the packaging container so that the peripheral wall surface 3 is not damaged. Function.

The outer surface of the container hanging part 5 (5a, 5b) and the inner surface of the lid hanging part 15 (15a, 15b) are brought into surface contact 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 to the container hanging part 5 (5a, 5b) or slightly larger.

The lid convex ring 16 provided in the height direction of the lid hanging part 15 (15a, 15b) serves as a lid upper edge of the lower lid when the lids are stacked. When the container 14 is held (see FIG. 3) and the container body is closed with the lid, it functions to fit into the container concave ring 6 (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. .

A lid flange horizontal portion 15c is formed at the lower end of the lid hanging portion 15 (15a, 15b).
c functions to prevent the lid hanging portion 15 from being damaged. The lid flange horizontal portion 15c is preferably formed parallel to the upper wall surface 12 of the lid, and the lid flange horizontal portion 15c
Is preferably approximately equal to the width of the container flange horizontal portion 5c described later. Further, it is convenient to provide a tongue piece used when opening the sealed container. When the tongue piece is provided, it is preferable to provide the tongue piece at at least one of corners away from the hinge portion.

The packaging container according to the present invention has a structure in which the container body 1 and the lid 11 are connected by a hinge portion 17. The hinge portion 17 is formed between the container flange horizontal portion 5c and the lid flange horizontal portion 15c. When the container main body and the lid are opened and placed horizontally, the lid flange horizontal portion 15c It is configured so as to be located above the flange horizontal portion 5c (see FIG. 2). When the lid is closed, first, when the corner Y of the lid flange horizontal portion 15c is brought into contact with the corner X of the container flange horizontal portion 5c, the lid hanging portion 15b becomes the container hanging portion 5b and the lid hanging portion 15a. The lid convex ring 16 is fitted into the container concave ring 6 in contact with the container hanging part 5a, and the two corners on the hinge side are completed. Next, the lid hanging part 15b of one side of the two sides close to the hinge part 17 is in contact with the container hanging part 5b, the lid hanging part 15a is in contact with the container hanging part 5a, respectively, and the lid convex ring 16 is a container concave ring. 6, and one corner away from the hinge is fitted. Finally, when the remaining one corner away from the hinge part 17 is pressed, the lid hanging parts (15a, 15b) and the container hanging part (5
a, 5b) are in contact with the entire circumference, and the lid convex ring 16 is fitted into the container concave ring 6 to complete the lid closing.

FIG. 1 shows an example of a typical combination of the present invention. However, the structure of the container body, the structure of the lid, and the relationship between the container body and the lid 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).

The externally fitted, sealed and easy-to-close type packaging container according to the present invention is molded (manufactured) from a synthetic resin sheet. The type of the synthetic resin is not limited as long as it can be formed into a sheet and the obtained sheet can be formed by a differential pressure molding method such as a pressure forming method, a vacuum forming method, and a vacuum / pressure forming method. Specific examples of the synthetic resin, polyethylene, polyolefin resin such as polypropylene, polystyrene,
Styrene resin such as styrene-acrylonitrile copolymer, high acrylonitrile copolymer, rubber reinforced polystyrene, ABS resin, polyvinyl chloride resin such as polyvinyl chloride, vinyl chloride-vinyl acetate copolymer, and acrylic resin such as polymethyl methacrylate Resins, polyester resins such as polyethylene terephthalate and polybutylene terephthalate, polyvinyl acetate, polyvinylidene chloride, polyvinyl alcohol, partially saponified polyvinyl alcohol, and polycarbonate. The synthetic resin is not limited to those exemplified.

These synthetic resin sheets may be colored or uncolored, 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.

In order to use the externally fitted, sealed, easy-to-close type packaging container according to the present invention, articles are stored in the article storage section of the container body, and are placed outside the frustum-shaped flange portion of the container body. If the cover is fitted from above, the container body can be sealed. When the lid is fitted over the outside of the frustum-shaped flange from above, as shown in FIG. 1, the container upper edge 4 and the lid upper edge 14, and the container hanging part 5 (5a, 5b) The lid hanging part 15 (15a, 15b) contacts the entire circumference of the container, and the lid concave ring 16
Are fitted 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.

In order to remove (open) the lid externally fitted to the frustum-shaped flange portion of the container main body, hold the container main body with one hand and hold the lid with the other hand and deform inward. Let it go outside. When tongue pieces are provided in opposition to the lid body flange horizontal portion 15c and the container flange horizontal portion 5c, preferably, at a corner portion away from the hinge portion, these tongue pieces are grasped with a fingertip and separated from each other. By pulling in the direction, the lid can be easily opened. 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.

There is no limitation on the articles to be housed in the externally fitted, sealed, easy-closing type packaging container according to the present invention, and any article may be used. Specific examples of the articles that can be stored include foods such as sandwiches, hot dogs, cakes, side dishes, pickles, fruits, vegetables, various sushi, cooked rice, and the like. However, the present invention is not limited thereto, and may be stationery, toys, accessories, clothing, cosmetics, and other articles.

The externally fitted, sealed and easy-closing type packaging container according to the present invention has the following particularly advantageous effects, and its industrial value is extremely large. 1. The outer fitting sealed type easy-closing type packaging container according to the present invention comprises a container hanging part (5a,
5b) has a structure that protrudes outward as it goes down, so that when storing and transporting after molding (manufacturing), a large number of container bodies and lids can be stacked (stacked). The volume is not bulky. Therefore, storage and transportation costs can be significantly reduced. 2. The outer fitting sealed type easy-closing type packaging container according to the present invention is provided with a container concave ring 6 in the width direction of the container hanging part 5 (5a, 5b), and a lid convex ring 16 provided thereon. Since the fitting is performed, the lid can be fixed to the frustum-shaped flange portion of the packaging container, and the sealing can be ensured.

3. The outer fitting sealed type easy-closing type packaging container according to the present invention has a structure in which the container body and the lid are connected by a hinge portion, but a large number of both the container body and the lid are stacked (stacking). ) Is not bulky. 4. When closing the outer fitting sealed easy-to-close type packaging container according to the present invention, first, two corners on the hinge side and one corner away from the hinge are fitted. And then one more
The lid can be easily closed by pressing one corner (with one touch).

[Brief description of the drawings]

FIG. 1 is an example of a packaging container of an externally fitted sealed type and an easily closed lid type according to the present invention, and is a longitudinal sectional view in a state where a lid is fitted into an opening of a container body.

FIG. 2 is a partially enlarged longitudinal sectional view of a hinge portion when the container shown in FIG. 1 is opened and arranged horizontally.

FIG. 3 is a partially enlarged longitudinal sectional view of a state where a plurality of container bodies shown in FIG. 1 are stacked.

4 is a partially enlarged longitudinal sectional view of a state where a plurality of lids shown in FIG. 1 are stacked.

[Explanation of symbols]

 1: Container main body 2: Low wall surface 3: Peripheral wall surface 4: Container upper edge 5a: Container lower part and upper part of container concave ring 5b: Container lower part and lower part of container concave ring 5c: Container Collar horizontal part 6: Container concave ring 11: Lid 12: Upper wall surface 13: Lid peripheral wall surface 14: Lid upper edge 15a: Lid hanging lower part, upper part of lid concave ring 15b: Lid hanging 15c: Lid flange horizontal part 16: Lid convex ring 17: Hinge part m: Gap from top of container concave ring to peripheral wall n: Top of container upper edge Significant X: Corner of container flange horizontal part 5c Y: Corner of lid flange horizontal part 15c

Claims (4)

[Claims] 1. A packaging container having an outer fitting closed type and an easy closing type in which a planar shape is a quadrilateral in which a container body made of a synthetic resin sheet and a lid are connected at a hinge portion, wherein the container body has a low wall surface. And an inverted truncated pyramid-shaped article storage portion is formed, and the container upper edge portion extends over the entire circumference of the opening, and extends outward as it goes down, and the container has a concave shape in the middle of the height direction. The container hanging part in which the ring is formed, the container flange horizontal part extending outward is respectively connected sequentially, and when the container is cut vertically, the cross section of the flange part forms a frustum shape as a whole, The lid body, the upper wall surface and the upper edge of the lid body connected to the upper body part, project outward outward as they go down, and, in the middle of the height direction, a lid hanging part formed with a lid convex ring. An outer fitting portion formed by sequentially connecting the lid flange horizontal portions extending in the direction is formed, and the hinge portion is Is formed between the container flange horizontal portion and the lid flange horizontal portion, and when the container body and the lid are opened and placed horizontally, the lid flange horizontal portion is positioned above the container flange horizontal portion. When the lid is closed, the lid flange horizontal portion is close enough to contact each other when the container flange horizontal portion is overlapped, and two corner portions on the hinge portion side and one corner portion away from the hinge portion are formed. An outside-fitting sealed easy-lid type packaging container characterized in that the lid can be closed by fitting and pressing only one remaining corner. 2. The container body has a structure in which a part hanging down from the container descends substantially vertically until reaching the concave ring of the container, and a part beyond the concave ring of the container protrudes outward as it goes downward. The lid has a structure in which the lower part of the lid hangs almost vertically until it reaches the convex ring of the lid, and the part beyond the convex ring of the lid protrudes outward as it goes downward. The outer-fitting hermetically sealed easy-lid type packaging container according to claim 1. 3. An angle protruding outward from a portion of the container body beyond the concave ring of the container and a portion beyond the convex ring of the lid is selected within a range of 10 to 30 ° with respect to a vertical line. The packaging container according to claim 2, wherein the packaging container is an externally-fitting sealed type and easy-to-close type. 4. The outer fitting sealed type and the easy closing type according to claim 1, wherein the container hanging portion and the lid hanging portion have substantially the same height as each other. Packaging container.