JPH10120004A - Packaging container whose lid can be easily opened - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging container which is capable of preventing leakage of the stored liquid or the liquid exuding from an article containing the liquid outside the container, excellent in strength, and easy to open a lid. SOLUTION: A packaging container comprises a container body 1 and a lid body 11 made of synthetic resin sheet, a horizontal stepped part of the container which is outwardly extended and a downwardly suspended part of the container are successively and continuously formed over the whole circumference of a circumferential wall surface, a projected bar of the container is formed on the horizontal stepped part, a tongue 7 is formed on an appropriate part of a lower end of the suspended part, a horizontal stepped part of the lid body, a suspended part of the lid body, and a projected part are successively and continuously formed on a circumferential edge part of the lid body 11, a lid body bar groove to be engaged with the projected bar of the container is formed on the lid body horizontal stepped part, a tongue 18 is formed on an appropriate part of the lid body suspended part, and an upper side (root) of the projected part is hooked to a lowest part of the suspended part of the container.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging container which can be easily opened. More specifically, a packaging container having a structure in which a container body and a lid made of a synthetic resin sheet are formed, and a lid body fitting portion is fitted from the outside to an upper part of a peripheral wall of the container body and a hanging part connected thereto. Also, the present invention relates to a packaging container which does not leak a liquid component contained in a container body or a liquid component leaking from an article containing a liquid component to the outside of the container, has excellent strength, and can be easily opened.

[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 shape, box shape (including not only rectangular and square planes, but also those with partitions and bottom wall supports), cup shapes, tubular shapes, inverted truncated cone shapes, inverted truncated pyramid shapes, etc. There are various shapes, and various shapes, sizes, designs, etc. are selected according to the purpose of use.

[0003] Regarding the box-shaped container, see JP-B-47-3.
As described in Japanese Patent No. 4794, a structure in which the container body and the lid are not connected,
As described in Japanese Patent Publication No. 56-56, a structure in which a container body and a lid are connected by a hinge portion has been proposed. These containers were closed with a lid after storing the article in the container body, and when fixing both, stabbing with a rubber band or a stapler was common. However, such a fixing method has drawbacks from the viewpoints of workability and safety. Therefore, as described in Japanese Utility Model Publication No. 48-43050, the container body can be covered without using a stapler. There has been proposed a container having a structure that can be closed and sealed. However, this real public 48-430
No. 50 requires sealing with an adhesive tape, and there is still a problem from the viewpoint of workability and hygiene.

[0004] Thereafter, as described in, for example, Japanese Utility Model Publication No. 53-5560 and Japanese Utility Model Publication No. 55-47148, the lid is attached to the container body without the need for staple attachment, sealing with an adhesive tape, or the like. A container having a structure that can be fitted and sealed has been proposed and put into practical use. However, the container having the structure described in Japanese Utility Model Publication No. 53-5560 is not easy to open when the user takes out the contents. In addition, both the container body and the lid are made of thin synthetic resin sheets. Since the molded article is a molded article, the container body and the lid cannot be held with a strong force, and therefore, it is difficult to apply a force for opening the lid, and thus the operation of opening the lid becomes extremely difficult. is there. Further, the container described in Japanese Utility Model Publication No. 55-47148 has a drawback in that, when an article containing a liquid component is stored in the container and the lid is closed and the storage container is rotated, the liquid component leaks out of the container. There has been a demand for a hermetically sealed packaging container which has solved these disadvantages at once.

[0005] A hermetically sealed container having a structure in which a lid is fitted to the container main body may have difficulty in opening the lid because of its excellent sealing performance. For the purpose of solving this problem, it has been proposed to provide tongue pieces on both flange portions of the container body and the lid (for example, Japanese Utility Model Publication No. 53-5560).
Reference). However, when the structure of the fitting portion between the container body and the lid is complicated, particularly, the length of the hanging portion of the flange portion of the container body is shorter than the length of the hanging portion of the flange portion of the lid body. In the case of such a combination, if a tongue piece extending simply outward is provided at the hanging part of the container body flange, there is a disadvantage that the tongue piece on the container body side prevents the fitting of the lid.

[0006]

SUMMARY OF THE INVENTION Under such circumstances, the present invention makes it easy to close the container body with a lid, and when closing and sealing, stabs with a stapler and seals with an adhesive tape. It is not necessary to store the article containing the liquid component in the container storage part and close the lid. Even if this storage container is rotated, the liquid does not leak out of the container, and the lid opening operation is extremely easy. It is intended to provide a simple packaging container.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a packaging container which is made of a synthetic resin sheet and has a lid, which can be easily opened. And an inverted frustum-shaped article storage portion is formed with the peripheral wall, and over the peripheral wall, over the entire circumference of the peripheral wall,
An outwardly extending container horizontal step portion and a downwardly hanging container hanging portion are successively formed, and the container horizontal step portion is formed at a position slightly away from the top of the peripheral wall surface at the top of the peripheral wall surface. A container ridge or a container groove is formed along the tongue, and a tongue piece having a concave portion along the wall surface of the container hanging part is provided at an appropriate lowermost position of the container hanging part. And a lid fitting portion connected to the lid, the lid fitting portion includes a lid horizontal step portion that contacts the container horizontal step portion, a lid hanging portion that contacts the container hanging portion, and a lid hanging portion. At the lower end of the hanging part, a protruding portion projecting inward is formed successively connected, and the upper lid horizontal step portion is a lid that fits into a container ridge or a container groove provided in the container horizontal step portion. A groove or lid ridge is formed, and when the lid is closed, the upper side of the protrusion is to be hooked on the lowermost part of the container hanging part, Thus provided at least one is parallel tongue against the upper wall surface in place the bottom of the body hanging portion, provide easy packaging container lid opening operation, characterized in that.

[0008]

DETAILED 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 a longitudinal sectional view of an example of a lid constituting a packaging container according to the present invention, which is easy to open, FIG. 2 is a longitudinal sectional view of an example of a container body, and FIG. It is a longitudinal section in the state where a lid was fitted in an opening of a container main part.

The container body 1 of the packaging container according to the present invention, which is easy to open, has an inverted truncated frustum shape, and has a basic structure in which an article storage portion is formed by the low wall surface 2 and the peripheral wall surface 3.
The shape of the inverted frustum constituting the article storage unit may be a polygon such as a triangle or a square, a circle, an ellipse, an oval, or the like. The polygon may have a shape in which each apex angle is rounded. 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.

A container horizontal step portion 4 extending outward and a container hanging portion 5 hanging downward are sequentially connected to the upper portion of the peripheral wall surface 3 over the entire periphery of the peripheral wall surface. The portion 4 is formed with a container ridge or a container groove (hereinafter simply referred to as a container ridge) along the uppermost portion of the peripheral wall surface at a position slightly away from the uppermost portion of the peripheral wall surface 3. FIG. 1 shows an example in which the container ridge 5 is formed. The container horizontal step portion 4, the container ridge 5, and the container hanging portion 6 are collectively referred to as a container body fitting portion. The container main body fitting portion simultaneously constitutes a flange portion (flange portion) of the container main body, functions to reinforce the opening of the container main body, and exerts a repulsive force even when a torsional stress is applied to the packaging container. And it functions so that peripheral wall 3 may not be damaged. In the present invention, “outward” means a direction away from the central axis of the inverted frustum-shaped container main body. “Inward” means the direction of the central axis.

The container horizontal step portion 4 extends outward from the uppermost portion of the peripheral wall surface of the container body and has a substantially constant width over the entire periphery of the opening of the container. The container horizontal step 4 is provided at a position slightly away from the uppermost part of the peripheral wall surface 3, preferably substantially at the center in the width direction of the container horizontal step 4, over the entire periphery of the container horizontal step 4. A container ridge 5 is formed. The container ridge 5 is fitted with a lid groove 15 described later, and functions to prevent the liquid component of the article stored in the article storage section from leaking out of the container. The cross-sectional shape cut at a right angle to the extending direction of the container ridge 5 may be any of a chevron, a trapezoid, and a semicircle.

On the outside of the container horizontal step 4, a container hanging part 6 hanging downward is formed. It is preferable that the container hanging part 6 hangs almost vertically from the container horizontal step part 4.
The structure may be slightly inclined inward toward the bottom, with the lowermost end facing outward. This is because the latter structure is preferable when the container body is formed from a synthetic resin sheet and the product is punched with a cutting blade. The container hanging part 6 comes into contact with an inner wall of a lid hanging part 16 described later, and the end of the container hanging part 6 has a protruding ring 1 provided below the lid hanging part 16.
7 is supported on the upper side. As the width of the container hanging portion 5 hanging down from the container horizontal step portion 4 becomes wider, the container hanging portion 5 is easily deformed, and the upper side (root) of the projecting ring 17 cannot be supported. Therefore, it is preferable that the hanging width of the container hanging portion 6 is small enough not to deform when supporting the upper side of the projecting ring 17.

A tongue piece 7 is provided at an appropriate lowermost position of the container hanging part 6. The tongue piece 7 can be held by a finger when the container body and the lid in the fitted state are opened. The tongue piece 7 is provided so as to extend outward at an appropriate position at the lowermost part of the container hanging part 6,
In addition, a concave portion 8 is formed in the tongue piece 7 substantially parallel to the wall surface of the container hanging part 6. By forming the concave portion 8 in the tongue piece 7, when the container main body and the lid are fitted to each other and the projecting ring 17 of the lid hits the tongue piece 7, the tongue piece 7 starts at the inner starting point of the concave portion 8. Since it is easily deformed downward, it does not hinder the fitting of the lid.

The width of the tongue piece 7 depends on the size of the sealed container, but if it is too small, it may be broken when the lid is opened. On the other hand, if it is too wide, the width of the sealed container fitted with the container body or the lid may be reduced. It is preferable to select a size in the range of 5 to 15 mm because it may hinder handling. When the container body is polygonal, the tongue piece 7 is preferably provided at the vertex of the polygon. When the container body and the lid are connected by a hinge, the tongue 7 is preferably provided at a position farthest from the hinge.

The lid is provided outside the container body fitting portion connected to the upper part of the peripheral wall of the opening of the container body, and inside the lid fitting portion provided to be connected to the upper wall surface of the lid. And
It functions to seal the container body. Therefore, the shape of the lid fitting portion is selected according to the shape of the container body fitting portion. The lid 11 includes an upper wall surface 12, a lid peripheral wall surface 13, and a lid fitting portion provided in connection therewith. The lid fitting portion includes a lid horizontal step portion 14, a lid groove or a ridge (hereinafter simply referred to as a lid groove) 15, a lid hanging portion 16, and a projection 1.
7 and a tongue piece 18.

The upper wall surface 12 of the lid may have a frustum shape corresponding to the article storage portion of the container body, and a combination such as a dome shape and a flat shape can be changed according to the use of the container.
FIG. 1 shows an example in which an upper wall surface 12 and a lid peripheral wall surface 13 form a two-stage frustum-shaped lid 11.

The lid horizontal step 14 is provided on the outer periphery of the lid 11 so as to be connected to the peripheral wall surface 13 of the lid, and has a structure in which it is in close contact with the surface of the container horizontal step 4. The cover horizontal step 14 is formed with a cover groove 15 that fits almost exactly with the container ridge 5 provided on the container horizontal step 4 over the entire circumference of the cover. The lid groove 15 is fitted almost exactly with the container ridge 5, and the two are in line contact or surface contact over the entire circumference to prevent the liquid component of the article stored in the article storage section from leaking out of the container. Performs the function of preventing. The cross section cut at right angles to the extending direction of the lid groove 15 has a shape conforming to the container ridge 5.

The lid hanging part 16 is in line or surface contact with the outside of the container hanging part 6 over its entire circumference, and serves to assist in sealing. It is preferable that the inner wall side hanging width of the lid hanging part 16 is substantially the same as the outer wall hanging width of the container hanging part 6.

An inwardly protruding portion 17 formed at the lower end of the lid hanging portion 16 extends further downward from the lowermost portion of the container hanging portion 6 and is fitted to the container body fitting portion from the outside. It functions to lock and fix the body fitting part. The upper side (root) of the protruding portion 17 protruding inward is hooked on the lowermost portion of the container hanging portion 6 to improve the sealing effect by fitting. That is, the upper surface of the container horizontal step portion 4 and the lower surface of the lid horizontal step portion 14 are adhered to each other, so that the fitting between the ridge 5 and the lid groove 15 is completed, and the container hanging portion 6 and the lid hanging The upper side (root) of the projecting portion 17 protruding inward to assist in contact with the portion 16 reaches the lowermost portion of the container hanging portion 6, and the sealing effect by fitting is improved. Further, the protruding portion 17 also has a function of reinforcing the end portion of the lid hanging portion 16 and preventing its breakage.

The projecting portion 17 is optimally formed in an annular shape so that the upper side (root) thereof is in contact with the entire periphery of the lid hanging portion 16. The shape is not limited to an annular shape as long as the fitting portion can be hooked, and may be a combination of a plurality of convex portions formed at regular intervals. The plurality of protrusions may be a combination of different shapes.

At least one tongue 18 parallel to the upper wall surface is provided at an appropriate position at the lowermost portion of the lid hanging portion 16 (tip of the protruding portion 17). The tongue piece 18 is opposed to the tongue piece 7 of the container main body when the lid is fitted to the container main body, and each tongue piece is separately picked with both fingers and pulled to the opposite side to easily open the lid. can do. The number of tongue pieces 18 may be one or two. When the container body and the lid are connected by a hinge, it is preferable to provide one at a position farthest from the hinge.

The packaging container according to the present invention, which can be easily opened, is formed of a synthetic resin sheet. The synthetic resin can be formed into a sheet, and the obtained sheet is formed by a pressure forming method,
The type is not limited as long as it can be formed by a differential pressure forming method such as a vacuum forming method or a vacuum / pressure forming method. Specific examples of the synthetic resin include polyethylene, olefin resins such as polypropylene, polystyrene, styrene-acrylonitrile copolymer, high acrylonitrile copolymer,
Styrene resins such as rubber reinforced polystyrene and ABS resin, polyvinyl chloride resins such as polyvinyl chloride and vinyl chloride-vinyl acetate copolymer, acrylic resins such as polymethyl methacrylate, polyester resins such as polyethylene terephthalate and polybutylene terephthalate resin,
Other examples include polyvinyl acetate, polyvinylidene chloride, polyvinyl alcohol, partially saponified polyvinyl alcohol, and polycarbonate.

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 or one may be opaque, and one may be colorless and the other may be colored.

In the above description, the container body and the lid are separated from each other. However, the container body and the lid may be connected by a hinge. When the rectangular container body and the lid are connected by a hinge, the hinge is preferably provided on the long side. The low wall surface 2 and the peripheral wall surface 3 of the container body can be provided with a step portion, various uneven patterns, and the like, and the upper wall surface 12 and the peripheral wall surface 13 of the lid body also have various uneven patterns. be able to.

When using the packaging container according to the present invention, which is easy to open, the article is stored in the article storage section of the container body, and the lid fitting section is provided on the outer wall surface of the container body fitting section from outside. Cover and fit. By fitting in this manner, the container horizontal step 4 and the lid horizontal step 14 come into contact with each other, and the container ridge 5 and the lid groove 15 are fitted to each other, and the wire is formed over the entire circumference. Contact or surface contact. Both the container hanging part 6 and the lid hanging part 16 are in line contact or surface contact over the entire circumference, the upper side (root) of the protrusion 17 reaches the lowermost part of the container hanging part 6, and the lid fitting part is the container fitting part. The structure is as if the fitting portion was grasped. Therefore,
The fitting between the container ridge 5 and the lid groove 15 and the contact between the container hanging part 6 and the lid hanging part 16 are ensured, and the sealing effect can be further improved. Thereby, it is possible to effectively prevent the liquid component of the article stored in the article storage section from leaking out of the container.

Further, both ends (corners) forming the container horizontal step portion 4 and portions forming the container ridges 5 act to reinforce the container body opening. Further, the lid groove 15,
The end (corner) of the lid horizontal step portion 14 and the projection 17 act to reinforce the lid. By these interactions,
Demonstrates repulsion even when torsional stress is applied to the packaging container,
The packaging container can be hardly damaged.

In order to take (open) the lid fitted externally to the opening of the container body, place the container body on the table and grasp the tongue piece 7 of the container body with one finger. What is necessary is just to pinch the tongue piece 18 of the lid with the finger of the other hand and pull it in the direction away from each other.

There is no limitation on the articles to be stored in the easily openable packaging container according to the present invention, and any article may be used.
Typical items that can be stored include sandwiches, hot dogs, cakes, side dishes, pickles, fruits, vegetables, various sushi, foods such as rice, but are not limited to these. Stationery, toys, and other articles.

[0030]

The packaging container according to the present invention, which can be easily opened, has the following particularly advantageous effects, and its industrial utility value is extremely large. 1. The easy-opening packaging container according to the present invention can be fixed by covering and fitting the fitting portion of the lid to the fitting portion of the container body opening from the outside, so that the stapling can be performed.
It does not require sealing with an adhesive tape, and is excellent in workability, safety and hygiene. 2. In the easy-opening packaging container according to the present invention, the container horizontal step 4 and the cover horizontal step 14 come into contact with each other, and the container ridge 5 and the cover groove 15 extend over the entire circumference. Mates and makes line or surface contact. The container hanging part 6 and the lid hanging part 16
A line contact or a surface contact over the entire circumference, the upper side (root) of the protruding portion 17 reaches the lowermost portion of the container hanging portion 6, and the lid fitting portion grips the container fitting portion. Become. As a result, the sealing is effectively achieved, and the liquid component of the article stored in the article storage section can be completely prevented from leaking out of the container.

3. In the packaging container according to the present invention, which is easy to open, the container opening of the container body is formed, and the lid is also formed with a fitting portion that fits from the outside of the container opening. The portion exerts a repulsive force against the torsional stress on the packaging container and does not break. 4. The easy-to-open packaging container according to the present invention is provided with a tongue piece at a lowermost suitable place of a container hanging part, and a tongue piece parallel to an upper wall surface at a lowermost suitable place of a lid hanging part. Since the tongue piece of the container body has a concave portion formed along the wall surface of the container hanging part, the container body and the lid are fitted to each other, and the projection 17 of the lid hit the tongue piece 7. At this time, since the tongue piece 7 is easily deformed downward at the inside starting point of the concave portion 8, the fitting of the lid is not hindered.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an example of a lid constituting a packaging container according to the present invention, which can be easily opened.

FIG. 2 is a longitudinal sectional view of an example of a container main body constituting a packaging container according to the present invention, which is easy to open.

FIG. 3 is a longitudinal sectional view showing a state in which a lid is fitted into an opening of the container body.

[Explanation of symbols]

 1: Container main body 2: Low wall surface 3: Peripheral wall surface 4: Container horizontal stepped portion 5: Container ridge 6: Container hanging part 7, 18: Tongue piece 8: Concave portion 11: Lid 12: Upper wall 13: Lid Peripheral wall surface 14: Lid horizontal step 15: Lid groove 16: Lid hanging lower part 17: Projection

Claims (2)

[Claims] An easy-opening packaging container comprising a container body made of a synthetic resin sheet and a lid, wherein the container body has a low frustum and a peripheral wall formed with an inverted frustum-shaped article storage portion. In the upper part of the peripheral wall, over the entire circumference of the peripheral wall,
An outwardly extending container horizontal step portion and a downwardly hanging container hanging portion are successively formed, and the container horizontal step portion is formed at a position slightly away from the top of the peripheral wall surface at the top of the peripheral wall surface. A container ridge or a container groove is formed along the tongue, and a tongue piece having a concave portion along the wall surface of the container hanging part is provided at an appropriate lowermost position of the container hanging part. And a lid fitting portion connected to the lid, the lid fitting portion includes a lid horizontal step portion that contacts the container horizontal step portion, a lid hanging portion that contacts the container hanging portion, and a lid hanging portion. At the lower end of the hanging part, a protruding portion projecting inward is formed successively connected, and the upper lid horizontal step portion is a lid that fits into a container ridge or a container groove provided in the container horizontal step portion. A groove or lid ridge is formed, and when the lid is closed, the upper side of the protrusion is to be hooked on the lowermost part of the container hanging part, Thus provided at least one is parallel tongue against the upper wall surface in place the bottom of the body hanging parts, easy packaging container lid opening operation, characterized in that. 2. The packaging container according to claim 1, wherein the container body and the lid are connected by a hinge.