JP2000355316A - Packaging container made of thermoplastic resin sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging container in which a lid closing operation and a lid opening operation can be easily carried out, a piercing attachment with a stapler and a seal with an adhesive tape are not needed when the lid is not removed from a container main body upon closing the lid, a high safety characteristic and a superior sanitary state can be attained and a volume of a plurality of containers can be reduced when they are stacked. SOLUTION: There is provided a packaging container comprised of a packaging container A and a lid member B which is made of thermoplastic resin sheet of which top plan view shape is rectangular, wherein an opening part of a storing section (a) of the packaging container A is formed with a container flange a2, and there is formed a lid flange b2 of which width is made wider than the container flange a2. Four corners of the lid flange b2 are formed with recesses b3 which are made to be slightly smaller than an outer shape of the container flange a2. A hook b4 is positioned at a rear side over an outer circumferential end of a corner a3 of the container flange a2. The corner a3 of the container flange a2 is inserted into a clearance b5 and can be engaged with it.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a packaging container made of a thermoplastic resin sheet. More particularly, the present invention relates to a packaging container made of a thermoplastic resin sheet mainly used for storing foods and the like.

[Prior art]

2. Description of the Related Art Conventionally, thermoplastic resin sheets have been widely used in various fields because a product having a shape suitable for the purpose can be easily produced by a differential pressure molding method such as a pressure forming method, a vacuum forming method, a vacuum / pressure forming method. Have been. For example, dish shape, box shape (planar shape is not limited to square, but also includes partition, bottom wall with lid support, etc.), cup shape, cylindrical shape, inverted truncated cone shape, and other various shapes The shape, size, design and the like are variously 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 a container body and a container lid are separated from each other.
As described in Japanese Patent No. 1056, a structure in which a container body and a container lid are connected at a hinge portion has been proposed. In these containers, the lid was closed after storing the article in the container body, and when fixing both, the sticking with a rubber band or a stapler was common. But,
Since such a fixing method has drawbacks from the viewpoint of workability and safety, a container having a structure as described in Japanese Utility Model Publication No. 48-43050 has been proposed. However,
The container described in Japanese Utility Model Publication No. 48-43050 needs to be sealed with an adhesive tape, and still has a drawback from the viewpoint of hygiene.

[0004] Thereafter, as described in Japanese Utility Model Publication No. 55-5560, for example, puncturing with a stepler,
2. Description of the Related Art A container having a structure in which a lid is fitted to a container body and can be hermetically sealed without requiring a seal or the like with an adhesive tape has been proposed and put into practical use. However, 55-5
In the container having the structure described in Japanese Patent Application Publication No. 560, it is not easy to open the lid when the user takes out the contents, and in addition, the container main body and the lid are formed from thin resin sheets. And cannot hold the lid with strong force,
Therefore, it is difficult to apply force to open the lid, which has a drawback that the opening operation becomes extremely difficult.

Further, the container having the structure described in Japanese Utility Model Publication No. 55-5560 cannot be nested to reduce the volume when a plurality of containers are stacked. A large number of cardboards are required for storage at the destination, transportation from the manufacturer to sales, and the like, and there is a drawback in that packaging costs, storage costs, and transport costs increase.

[0006]

SUMMARY OF THE INVENTION In this situation, the present invention does not require stapling with a stapler or sealing with an adhesive tape, and is excellent in safety and hygiene.
Covering operation, opening operation, etc. are easy.
In order to provide a packaging container made of a thermoplastic resin sheet in which storage costs and transportation costs are not increased, as a result of intensive studies, the structure of the flange portion of the container body and the lid is slightly changed, so that the conventional packaging container can be provided. The inventors have found that the above-mentioned drawbacks can be eliminated at once, and have completed the present invention.

In order to solve the above problems, the present invention provides:
In a packaging container made of a thermoplastic resin sheet composed of a container body (A) and a lid body (B) and having a rectangular outer shape in a rectangular shape, an opening (a1) of a storage section (a) of the container body (A) is provided. A container flange (a2) that is parallel to the bottom wall and extends outward is formed, and the lid (B) faces the container flange (a2) and is wider than the container flange (a2). A lid flange (b2) is formed, and container flanges (a) are provided at the four corners of the lid flange (b2).
A notch (b3) slightly smaller than the outer shape of (2) is formed, and the hook (b4) outside the notch (b3) is on the back side beyond the outer edge of the corner (a3) of the container flange (a2). At the gap (b5) created when the notch (b3) is widened
A packaging container made of a thermoplastic resin sheet, characterized in that a corner (a3) of (a2) can be inserted and hooked.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.
The packaging container made of the thermoplastic resin sheet (hereinafter, may be simply referred to as “resin sheet”) according to the present invention includes a container body.
(A) and a lid (B), the storage part (a) has an inverted truncated frustum shape (a shape diverging upwards), and a plurality of container bodies (A).
It is preferable to set the divergent angle so that the minimum volume can be obtained when the is stacked. Opening (a1) of this storage section (a)
Can be selected from various shapes such as a substantially square, semicircular, and circular shapes. The substantially square shape includes a rectangular shape (rectangular shape, square shape, and the like) and a shape in which the corners are cut out and rounded. The planar shape of the storage section (a) is preferably a square.

An opening (a1) at the upper part of the peripheral wall of the storage part (a) of the container body (A) has a container flange extending parallel to the bottom wall and extending outward over the entire periphery of the peripheral wall. (a2) is formed, and the planar shape of the outer shape of the container flange (a2) is quadrangular. "The outer shape is square" means the container body
The opening of the container body (A) regardless of the shape of the storage section (a) in (A)
It means that the outer shapes of the container flange (a2) formed on (a1) and the lid flange (b2) formed opposite to the container flange (a2) are both rectangular, but geometrically. It is meant to include not only an accurate square but also a rounded shape with some corners cut out.

If the size of the storage portion (a) of the container body (A) is too large, the strength of the packaging container and the convenience in use are deteriorated, so the planar shape of the opening (a1) is circular. In the case, the diameter is about 3 to 15 cm, when the plane shape is rectangular, the length of one side is about 3 to 20 cm, and the height (depth) of the storage part (a) is in the range of 1 to 5 cm. Is preferred. Storage unit (a)
On the wall surface of (1), irregular ribs, irregular patterns, and the like for reinforcing the peripheral wall surface and the bottom wall can be appropriately formed in accordance with the overall design of the packaging container.

The container flange (a2) formed at the opening (a1) of the storage section (a) of the container body (A) is connected to the opening (a) of the container body (A).
In addition to fulfilling the function of reinforcing 1), the function of hooking a narrow hook (b4) formed when the notch (b3) formed in the lid flange (b2) described later in the corner (a3) is expanded. Fulfill. The structure of the container flange (a2) is not particularly limited, and may be a flange having a structure generally formed at the opening of the storage portion of this type of container.
The structure of the container flange (a2) has a flat shape, a structure in which a drooping portion hanging downwards is continuously formed outside the flat portion, and a shorter flat portion is formed outside the drooping portion. And the like. Container body (A) with lid (B)
When the lid is covered, the container flange (a2) and the lid flange (b2)
It is particularly preferable to employ a structure in which a gap leading to the storage portion (a) does not occur between the first portion and the second portion.

[0012] The width of the container flange (a2) can be changed according to the type and thickness of the resin sheet, the use and size of the packaging container, the overall design, and the like. Usually 3 to 1
You can choose from a range of 0mm. The container flange (a2) has a lid flange (b2) that can be picked with a finger when opening the lid.
Of the container flange (a2)
2) One or two tongue pieces (a5) extending more outward can also be formed. The tongue piece (a5) is preferably provided on the hinge-free side of the container flange (a2) in the case of a hinged container, and the long piece of the container flange (a2) in the case of a hinged container.

The lid (B) of the packaging container according to the present invention covers the opening (a1) of the container body (A) from above and covers the opening (a1). The lid (B) may be separated from the container body (A), or may be integrally connected to the container body (A) at the hinge part (C). Like the case of the container body (A), the lid (B) is preferably formed in a shape that can minimize the volume when a plurality of lids (B) are stacked. The lid (B) has a lid flange (b2) that faces the container flange (a2) when the lid (B) is put on the container body (A). The width of the lid flange (b2) is wider than the container flange (a2). Preferably, the width is 3 to 10 mm wider than the entire width of the container flange (a2). The structure of the lid flange (b2) is such that the part (b21) overlapping and facing the container flange (a2) matches the structure of the container flange (a2), and the part (b21) facing and not overlapping the container flange (a2). b22) is preferably extended outward in a plane.

In the lid flange (b2), cuts (b3) slightly smaller than the outer shape (dimensions) of the container flange (a2) are formed at the four corners. The outer dimensions (dimensions) of the cut (b3)
Should be slightly smaller than the outer shape of the container flange (a2), and the four corners (a3) of the container flange (a2) should have the apparent planar shape of the cut (b3) of the lid flange (b2). It may be slightly larger. Here, "slightly" means within several millimeters, preferably within 1 millimeter, and "apparent plane shape of cut (b3)" means extending cut (b3) at the corner of lid flange (b2). Refers to a flat part formed by

The notch (b3) is formed by grasping the thin hook portion (b3) on the outside of the notch (b3) with a finger and spreading it downward, and extending the hook portion (b4) beyond the outer edge of the corner (a3) of the container flange (a2). To the back side, and open the notch (b3) with the container flange
The corner (a3) of (a2) is inserted and can be hooked. By making the notch (b3) slightly smaller than the outer shape of the container flange (a2), the hooked portion (b4) located behind the corner (a3) and hooked does not easily come off the corner (a3). Notch (b3)
Can be changed depending on the type of the resin sheet, its thickness, the use and size of the packaging container, the width of the lid flange (b2), and the like. Usually, the length can be selected within a range of 5 to 50 mm along the outer shape of the container flange (a2).

The packaging container according to the present invention is manufactured using a thermoplastic resin sheet as a raw material. The thermoplastic resin is not particularly limited as long as it can be formed into a sheet and a container can be manufactured from the sheet by a differential pressure molding method. Specifically, styrene resins such as general-purpose polystyrene and rubber-modified polystyrene, polyolefin resins such as polypropylene and polyethylene, polyester resins such as polyethylene terephthalate and polybutylene terephthalate, polyvinyl chloride, and vinyl chloride-vinyl acetate copolymer Examples include vinyl chloride resins such as coalesced resins, acrylic resins such as polymethyl methacrylate, and other materials such as polyvinylidene chloride, polycarbonate, and polyvinyl alcohol.

The resin sheet may be unstretched or biaxially stretched, and is preferably biaxially stretched. The resin sheet may be colored or uncolored, may be transparent or opaque, and may be printed with various patterns and characters. Both the container body (A) and the lid (B) may be transparent, one may be opaque, and only one may be colored. The container body (A) and the lid (B)
They may be made of the same kind of resin sheet or different resin sheets. The thickness of the resin sheet varies depending on the type of the thermoplastic resin, the use of the packaging container, and the like.
It can be selected in the range of 1.0 mm.

At least a corner (a3) of the container body (A)
And at least the periphery of the notch (b3) of the lid (B), and if these colors are different from each other, the storage portion (a) of the container body (A) is closed by the lid (B). This is preferable because it is possible to easily visually check whether or not the corner (a3) of the container body (A) has been inserted and locked into the gap (b5) of the lid (B) when the lid is covered.

The above-mentioned "container body (A) has at least a corner (a
`` 3) '' means that only the corner (a3) of the container body (A), a wide portion including the corner (a3), and the entire container body (A) are colored. `` At least around the notch (b3) of (B) '' means `` only around the notch (b3) of the lid (B), a wide portion including the notch (b3), and the entire lid (B) is colored. Means to do. Further, the “different color” means a color that is different in any one of hue, lightness, and saturation. Examples of the combination of “different colors” include red and blue, red and white, black and white, bright yellowish green and blackish dark green, and the like.

The packaging container according to the present invention can be easily manufactured by using a thermoplastic resin sheet as a raw material by a differential pressure molding method such as a pressure forming method, a vacuum forming method, and a vacuum / pressure forming method. Normally, wide and long resin sheets are used as raw materials,
A large number of container bodies (A) and / or lids (B) are semi-continuously formed by a differential pressure molding method, and a molded product is punched from a raw resin sheet with a punching blade. Lid flange
The cut (b3) of (b2) can be formed at the same time as the cover (B) is punched with a punching blade from the raw resin sheet,
After punching the lid (B) from the raw resin sheet, it can be formed in another step.

When the container body (A) and the lid (B) are manufactured separately, the raw material resin sheet for manufacturing the container main body (A) and the raw material resin sheet for manufacturing the lid (B) are different. The raw material resin sheets colored in different colors are formed by the differential pressure molding method and punched out, and the container body (A) and the lid (B) may have different colors from each other. it can. When the container body (A) and the lid (B) are integrally connected to each other by the hinge portion (C) when manufacturing the raw material resin sheet, a plurality of linear colorings are applied to the raw material resin sheet. The part for the container body (A) and the part for the lid (B) of the sheet have different colors from each other, and this raw material resin sheet is formed by the differential pressure molding method and punched out, and on the opposite side of the hinge part (C). The two corners (a3) located and the periphery of the two cuts (b3) located on the opposite side of the hinge (C) can be different colors from each other.

The container body (A) and / or lid (B)
Are formed by the differential pressure molding method and punched out, and then cut (b) in the corner (a3) of the container body (A) and the lid (B).
The periphery of 3) may be colored with a printing ink or a paint, and the periphery of the corner (a3) and the cut (b3) may have different colors.

When using the packaging container made of a thermoplastic resin sheet according to the present invention, articles are stored in the storage section (a) of the container body (A), and the articles are stored from above the opening of the container body (A). Cover the lid (B) to cover the opening (a1) and cut the lid flange (b2) (b3)
A gap (b5) is formed when the thin hook part (b4) outside the is gripped with a finger and spread downward, and the hook part (b4) crosses the outer edge of the corner (a3) of the container flange (a2). To the back side, and this gap (b5)
The first corner (a3) of the container flange (a2) is inserted into and hooked into the container. In the same procedure, insert the second, third and fourth corners (a3) of the container flange (a2) into the corresponding gaps (b5), respectively, and insert the corners of the container flange (a2) ( a3) By being positioned on the back side beyond the outer peripheral edge and hooking, the opening of the container body (A) can be closed with the lid (B), and the lid flange (b2)
Are hooked to the container flange (a2) at the four corners, so that the covered lid (B) can be prevented from coming off the container body (A).

In order to take out the articles stored in the storage section (a) of the container body (A), grasp the hook portion (b4) of the first corner (a3) of the lid flange (b2) with a finger. At the corner (a3) of the container flange (a2)
When the hook (b4) of the adjacent corner (a3) is removed from the corner of the container flange (a2), the remaining two hooks (b4) should be very easily removed and opened. Can take out the goods. In addition, if the tongue piece (a5) is provided at an appropriate position on the long side of the container flange (a2), the container body (A) side can be fixed, so that the opening operation is further facilitated. The packaging container according to the present invention can be repeatedly covered and opened as long as the hook (b4) is not torn. When not reused, the hook (b4) can be cut and opened.

[0025]

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 partial plan view of an example of the packaging container according to the present invention, and FIG. 2 is a sectional view of the packaging container shown in FIG.
It is sectional drawing in II part. FIGS. 1 and 2 illustrate a packaging container in which the container body (A) and the lid (B) are integrally connected by a hinge (C). Container body (A)
Has a storage portion (a) formed therein, and an opening (a
In 1), a container flange (a2) is formed over the entire circumference, and a tongue piece (a5) is provided on a long side where there is no hinge portion (C). The lid (B) has a lid flange (b2) facing the container flange (a2) when the lid is applied to the container body (A). The lid flange (b2) is wider than the width of the container flange (a2), and the portion (b2
1) and the non-overlapping portion (b2
2) is provided.

FIG. 3 is a partial plan view of an example in which a corner (a3) of the container flange (b2) is larger than other portions of the container flange (b2). In this example, the corner (a3) of the container flange (a2)
However, the apparent planar shape of the cut (b3) of the lid flange (b2) is made larger.

FIG. 4 is a perspective view showing a state in which the hook portion (b4) of the lid flange (b2) shown in FIG. 3 is gripped by a finger and spread downward. After the state shown in FIG. 4, the gap (b
5) Insert the corner (a3) of the container flange (a2) into the hook
(b4) is positioned behind the corner (a3) of the container flange (a2). Even if the corner (a3) of the container flange (a2) is slightly larger than the other part of the container flange (a2) as shown in FIG. Insert the corner (a3) of the container flange (a2) into the gap (b5) formed by spreading in the side direction, and hook the hook (b4) on the back side of the corner (a3) of the container flange (a2). The lid (B) can be securely covered with the container body (A).

[0029]

The present invention has the following particularly advantageous effects, and its industrial value is extremely large. 1. The packaging container according to the present invention has cutouts (b3) slightly smaller than the outer shape of the container flange (a2) formed at the four corners of the lid flange (b2), and hooks outside the cutouts (b3). Part (b4) is located on the back side beyond the outer edge of the corner (a3) of the container flange (a2), and the corner of the container flange (a2) is formed in the gap (b5) formed when the notch (b3) is widened. Since (a3) is inserted and latched, the storage portion (a) of the container body (A) can be reliably covered with the lid (B). 2. The packaging container according to the present invention is excellent in rigidity because it is made of a thermoplastic resin sheet, and has a lid flange (b
Even if the notch (b3) provided in 2) is smaller than the outer shape of the container flange (a2), the hook (b4) is hardly torn off, and the lid can be securely covered.

3. The packaging container according to the present invention comprises a container body
When the cover (A) is covered with the cover (B), a stapler or an adhesive tape is not used, so that it is safe and sanitary. 4. Since the packaging containers according to the present invention can be nested when a large number of them are stacked, packaging costs, storage costs, transportation costs, and the like do not increase. 5. In the packaging container according to the present invention, at least the corners (a3) of the container body (A) and at least the periphery of the notch (b3) of the lid body (B) are colored, and these are colored differently from each other. Therefore, when the storage portion (a) of the container body (A) is covered with the lid (B), the container body is inserted into a gap (b5) formed when the cut (b3) of the lid (B) is expanded. Whether or not the corner (a3) of (A) is inserted and latched can be easily visually checked.

[Brief description of the drawings]

FIG. 1 is a partial plan view of an example of a packaging container according to the present invention.

FIG. 2 is a sectional view taken along the line II-II of the packaging container shown in FIG.

FIG. 3 is a partial plan view of an example in which a corner of a container flange is made larger than other portions.

FIG. 4 is a perspective view of a state in which a hook portion of a lid flange is grasped with a finger and spread in a downward direction.

[Explanation of symbols]

 A: Container body B: Lid C: Flange a: Storage part a1: Container opening a2: Container flange a3: Four corners a5: Tongue b2: Lid flange b3: Cut b4: Hook b5: Clearance

 ────────────────────────────────────────────────── ─── Continued on front page F term (reference) 3E033 AA10 BA15 BA16 BA18 BA19 BA22 DA01 DA04 DA08 DD01 FA04 3E084 AA06 BA01 CA03 CB03 CB04 CC03 CC04 CC05 DA03 DB13 DC03 DC04 DC05 FA03 FC03 GB12

Claims (4)

[Claims] 1. A packaging container made of a thermoplastic resin sheet comprising a container body (A) and a lid body (B) and having a rectangular outer shape in a rectangular shape, wherein an opening of a storage portion (a) of the container body (A) is provided. (a1) is formed with a container flange (a2) that is parallel to the bottom wall and extends outward, and the lid (B) faces the container flange (a2), and this container flange (a2 A lid flange (b2) having a larger width is formed, and cuts (b) slightly smaller than the outer shape of the container flange (a2) are formed at the four corners of the lid flange (b2).
3) is formed, and the hook (b) outside the cut (b3) is formed.
4) is located on the back side beyond the outer edge of the corner (a3) of the container flange (a2), and the gap (b5) formed when the cut (b3) is widened into the corner (a3) of the container flange (a2) A packaging container made of a thermoplastic resin sheet, characterized in that it can be inserted and hooked. 2. Thermoplastic according to claim 1, wherein the container flange (a2) is made larger at its four corners (a3) than the apparent planar shape of the cut (b3) of the lid flange (b2). Packaging container made of resin sheet. 3. The container body (A) and the lid (B) are hinged (C).
The packaging container made of a thermoplastic resin sheet according to claim 1 or 2, wherein the packaging container is connected with the packaging container. 4. At least a corner (a3) of the container body (A),
The thermoplastic resin sheet according to any one of claims 1 to 3, wherein at least the periphery of the notch (b3) of the lid (B) is colored, and these are colored differently from each other. Packaging containers.