JPH07285531A - Corner part structure of container for packaging - Google Patents

Abstract

PURPOSE:To provide by a simple construction a container for packaging which sufficiently ensures the rigidity at respective corner parts, and for which a die requires no great change to be imparted. CONSTITUTION:At the top of each corner part of at least a container main body 10a or lid body 10b, an approx. linear form recessed part 14 for reinforcement, which tilts extending from a bottom surface part 13 or flat surface part 13b to side walls 12a, 12b, is formed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging container, and more particularly to a packaging container comprising a container body molded from a synthetic resin sheet and a lid fitted therein.

[0002]

2. Description of the Related Art In recent years, sweets, prepared foods, drinks and the like have been transported or sold by putting them in a specific packaging container, and packaging containers therefor are manufactured in a wide variety. This packaging container can be roughly divided into a tray that protects the contents by wrapping it, and a pack that uses a specific lid, but in any case, it is hygienic and disposable. It is formed using a synthetic resin as possible.

By the way, a container body or a lid constituting a packaging container which is a pack is manufactured by vacuum forming or pressure forming using a synthetic resin sheet (for example, polyester terephthalate) as a material, and is so-called drawn. The thickened portion has a smaller sheet thickness. In particular, in order to reduce the dead space when the lid and the entire container body to which the lid is fitted are stored in a transport box or displayed on a display rack, a polygonal shape such as a triangle or a square is used. When formed as, the corner portions tend to be weak in strength.
In that case, the wall thickness of the corner portion of the container body or the lid is inevitably thinner than the other portions, and the rigidity of each corner portion is extremely lowered.

In particular, the lid used for the packaging container may be made of the same material as the container body, but only the lid is made of a transparent material as in the case of storing prepared foods, for example. Therefore, it is performed to make it easy to see what is stored in the packaging container from the outside (especially when it is displayed). For prepared foods, such as salads, where the serving state is also an important selling point, the portion protruding upwards is provided on the lid as shown in FIG. In addition to protecting the building, it is being made visible from the outside.

Therefore, in the conventional lid body shown in FIG. 4 or the container body into which the lid body is fitted, the rigidity is ensured by forming the vicinity of the corner portion into a complicated shape. is there. However, in the conventional lid body shown in FIG. 4 or the container body to which the lid body is fitted, the wall thickness at the corner portion remains thin due to vacuum or pressure forming, so that the entire periphery of the corner portion is covered. The applied force is sufficiently protected by the complicated shape in the vicinity thereof, but when the force is applied to the corner partly and directly, the corner part is crushed. In particular, the lid whose overall shape is a substantially quadrangle can be used for storage, transportation, or display work.
In many cases, each corner portion comes into contact with another object, and in that case, a force for crushing the corner portion is likely to be applied, and concentration is facilitated.

[0006] When the corner portion is crushed, not only the portion becomes cloudy and the appearance becomes bad, but also when force is applied next, the lid portion is further crushed by the crushed portion,
In some cases, it will cause damage,
The function of the transparent lid body required for the packaging container or the function of the container body itself of storage cannot be fulfilled.

[0007] Therefore, the present inventor has made various studies on how to make full use of the merits of the packaging container formed of the synthetic resin sheet and to make the corner portion have sufficient strength. As a result of the repeated accumulation, the present invention has been completed.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and the problem to be solved is to provide a corner or a corner of a container body or a lid formed by a synthetic resin sheet into a substantially rectangular shape. It is to secure the rigidity in the section.

The object of the present invention is to provide a packaging container having a simple structure, which can sufficiently secure the rigidity of each corner portion thereof and does not require a great change in a mold for molding. Is to be provided by.

[0010]

Means for Solving the Problems In order to solve the above problems, the means adopted by the present invention will be described with reference to the reference numerals used in the examples. A packaging container 10 having a container body 10a whose portion is formed into a substantially rectangular shape and a lid 10b fitted with a fitting edge formed at the upper end edge of the container body 10a.
In at least the container body 10a or the lid 10
The corner portion structure of the packaging container 10 is characterized in that a substantially linear reinforcing recess 14 that is inclined from the bottom surface portion 13a or the flat surface portion 13b to the side walls 12a and 12b is formed at the top of each corner portion of b ". is there.

That is, this substantially rectangular packaging container 10
Is a container body 10a and a lid body 10b which compose this.
Is vacuum-formed or pressure-formed with a synthetic resin sheet, but a substantially linear reinforcing recess 14 inclined from the bottom surface portion 13a to the side wall 12a is formed at the top of each corner portion of the container body 10a, Or the lid 10
At the top of each corner of b, from the flat surface portion 13b to the side wall 12
The reinforcing recess 14 is formed in a substantially linear shape that is inclined over b.

Each reinforcing recess 14 has a straight portion 14
a is from the bottom surface portion 13a or the flat surface portion 13b to the side wall 12a
• It must be a literal straight line that slopes over 12b because the straight line portion 14a
This is because the rigidity can be easily secured by making the linear shape.

[0013]

In the packaging container 10 according to the present invention configured as described above, the rigidity of each corner portion is improved by the reinforcing recesses 14 formed at each corner portion of the container body 10a or the lid 10b. It is enough.

That is, in each of these reinforcing recesses 14, the straight line portion 14a is depressed inward from the surface forming the side wall 12a or 12b of the container body 10a or the lid 10b. Since the protrusions having a substantially triangular pyramid shape are formed on both sides of the portion 14a, as a result, one that protrudes inward by the linear portion 14a and one that protrudes outward by both sides are formed. , A total of three protrusions are formed. Moreover, since the linear portion 14a of each reinforcing recess 14 is linear, it can withstand the force applied to each corner portion of the protruding portion 15 sufficiently.

Therefore, in this packaging container 10,
Due to the reinforcing recesses 14 formed at the corners of the container body 10a or the lid 10b, the corners have sufficient rigidity so as not to be crushed by an external force.

Further, the container body 10 of this packaging container 10
Considering the mold for manufacturing a or the lid 10b, the mold for forming the reinforcing recess 14 at each corner has a straight part 14a of the reinforcing recess 14, a bottom part 13a or a flat part. 13b to sidewalls 12a and 12b
Since it has a linear shape that is inclined over, it is easy to form. Of course, since each reinforcing recess 14 has the above-described shape, the container body 1
It goes without saying that the die 0a or the lid 10b can be easily removed.

Further, when a large number of container bodies 10a or lids 10b as described above are stacked, the reinforcing recess 1
No. 4 does not cause any trouble because it has a shape that allows easy die-cutting as described above, and each of the reinforcing recesses 14
Since the container is formed at each corner, the container body 1
0a or the lid 10b is not hindered from overlapping, and a large dead space is not formed. Therefore, a large number of container bodies 10a or lids 1
It is possible to efficiently superimpose 0b.

The lid 10b according to the present embodiment has a protruding portion 15 formed by the side wall 12b protruding upward from the fitting edge 11, and the protruding portion 15 also has an auxiliary portion. Since the protrusion is formed in stages,
The complex shape based on these ensures the rigidity of the whole. If such an auxiliary protrusion is formed on the bottom surface 13a side, a complicated shape based on the auxiliary protrusion causes
Even on the container body 10a side, the rigidity of the entire body is secured. The lid 10b is formed of a transparent synthetic resin sheet and has the protrusion 15 formed by the side wall 12b.
What is housed in the container body 10a into which b is fitted can be seen from the outside, and the contents formed in the packaging container 10 can be freely arranged by utilizing the space formed by the protrusions 15. It is natural that it has become.

[0019]

The present invention will now be described with reference to the embodiments shown in the drawings. The present invention is not limited to the container body 10a or the lid 10b constituting the packaging container 10, or the container body 10a and Since it can be applied to both of the lids 10b, in the following embodiments, the case of applying the lid 10b will be mainly described.

The lid 10b is, as shown in FIG. 1, a flange portion 11a of a container body 10a formed in a substantially rectangular shape.
To be fitted, that is, fitted outside, and formed by vacuum forming or pressure forming using a transparent synthetic resin sheet made of polyester terephthalate, for example. Of course, the fitting edge 11 of the lid 10b is formed with an engagement recess 11b which is externally fitted to the flange portion 11a on the container body 10a side.
By engaging the flange portion 11a, the container body 1
This prevents the lid body 10b fitted in 0a from coming off.

Further, as shown in FIG. 1, the lid 10b in the present embodiment is formed such that the flat surface portion 13b which is the upper surface thereof is continuous with the fitting edge 11, and is upward from the flat surface portion 13b. The protruding portion 15 protruding (bulging) is formed by bulging the side wall 12b. Further, an auxiliary projecting portion is formed on the projecting portion 15 so as to project upward in a state where the flat surface portion is partially left and which constitutes the flat surface portion 13b on the upper surface thereof. In this way, the protruding portion 15 and the auxiliary protruding portion protruding therefrom are formed via the flat surface portion or the like, and the lid body 10b also forms a protective space for the contents stored in the container body 10a also above the lid body 10b. This is for ensuring the rigidity of the entire lid 10b by the above-described shape.

Then, as shown in FIG. 2, all the corner portions of the above-mentioned protruding portion 15 have a linear straight portion 14a.
A reinforcing recess 14 is formed which has Each reinforcement recess 14
Is a linear shape whose linear portion 14a is inclined at an angle of 30 ° to 60 ° with respect to the side wall 12b or the fitting edge 11 forming the protrusion 15, and the depth of the protrusion 15 is 15 °.
The height is 1/10 to 1/2 of the height of the above, but in the present embodiment, it has the following specific numerical values.

That is, the outer shape of the lid 10b: 155 mm × 230 mm, the width of the flat surface portion below the side wall 12b; 10 mm, the outer shape of the protruding portion 15, 30 mm × 210 mm, the height of the protruding portion 15, and the linear portion 14a. Length: about 7 mm Angle of the straight portion 14a with respect to the fitting edge 11: About 45 ° Angle of the straight portion 14a with respect to the lateral side of the protruding portion 15: About 45
The maximum depth of the straight portion 14a is about 3 mm.

In this embodiment, the corners of the auxiliary protrusion formed on the protrusion 15 are eliminated so that the upper rectangular surface of the protrusion 15 is a substantially triangular flat surface. As a result, each reinforcing recess 14 is largely exposed, and each reinforcing recess 14 positively receives the force applied thereto, so that each reinforcing recess 1
The protection of the corner portion of the lid body 10b by means of No. 4 can be positively performed.

Further, in the lid body 10b according to this embodiment, as shown in FIG. 1, the side wall 12b forming the projection 15 and the lower flat surface portion thereof are bordered with each other. By swelling outwardly, a plurality of polymerization prevention protrusions 1
6 is formed. In the present embodiment, on the long side of the protruding portion 15, two polymerization preventing protrusions 16 are respectively located near the left side of the drawing, and on the short side of the protruding portion 15, the polymerization preventing protrusion 16 formed on the long side. On one short side on the opposite side, a total of four polymerization preventing projections 16 including two polymerization preventing projections 16 which are respectively brought close to the ends are formed. That is, each of the polymerization preventing protrusions 16 is formed at a position that is not point-symmetric with respect to the center point of the lid 10b, and the presence of these polymerization preventing protrusions 16 causes each of the lids 10b to rotate by 180 °. When the lids 10b are overlapped with each other in the opened state, a predetermined space is formed between the lids 10b so that the lids 10b can be easily removed.

Reinforcement recess 14 having the above straight line portion 14a
1 and 3, as shown in FIGS. 1 and 3, may be formed at each corner of the container body 10a, which is the other member of the packaging container 10, and in that case The linear portion 14a may be inclined with respect to the side wall 12a on the container body 10a side.

As described above in detail, the lid 1 according to the present invention
0b, as illustrated in the above embodiment, at least the top of each corner of the container body 10a or the lid 10b has a substantially linear reinforcing recess inclined from the bottom surface 13a or the flat surface 13b to the side walls 12a and 12b. Since the location 14 is formed, there is a characteristic feature of the configuration, and by this, the rigidity of each corner portion can be sufficiently secured, and a lid body that does not require a great change in the die for molding is provided. It can be provided with a simple configuration.

In particular, since each of the reinforcing recesses 14 has the above-mentioned structure, not only the mold can be easily formed, but also the structure of the mold can be simplified. . Moreover, each of the reinforcement recesses 14 has a lid 10b.
Even if it is formed at each corner portion of the side protruding portion 15, since these are partial, the packaging container 10
As a matter of course, it does not hinder the visual confirmation of the stored items, and does not impair the outer appearance of the entire lid 10b.

[Brief description of drawings]

FIG. 1 is a perspective view showing an entire lid according to the present invention.

FIG. 2 is a magnified perspective view of a reinforcing recess seen from the direction of arrow 1 in FIG. 1, showing a case where the main part of the present invention is implemented on the lid side.

FIG. 3 is a magnified perspective view of a reinforcing recess seen from the direction of arrow 2 in FIG. 1, showing a case where the main part of the present invention is implemented on the container body side.

FIG. 4 is a perspective view showing a conventional lid body.

[Explanation of symbols]

 10 Packaging Container 10a Container Main Body 10b Lid 11 Fitting Edge 11a Flange Part 11b Engagement Recess 12a Side Wall 12b Side Wall 13a Bottom Surface 13b Flat Surface 14 Reinforcement Recess 14a Straight Part 15 Projection

Claims (1)

[Claims] 1. A container body formed of a synthetic resin sheet, each corner portion of which is formed into a substantially square shape, and a lid body fitted with a fitting edge formed at an upper end edge of the container body. In a packaging container having, a packaging container characterized by forming a substantially linear reinforcing recess inclined from a bottom surface portion or a flat surface portion to a side wall at least at a top portion of each corner portion of the container body or the lid body. Corner structure.