JP2569270B2 - Synthetic resin container with lid - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention
The present invention relates to a synthetic resin container in which a lid is integrally connected via a bendable hinge portion.

[0002]

2. Description of the Related Art A container having a lid integrally connected to a container body via a flexible hinge portion as described above is mainly manufactured by vacuum forming a thin synthetic resin thin sheet. Fig. 1 shows a container for packaging eggs.
As shown in FIG. 2 (A), it is manufactured with the lid 3 'opened 180 degrees (reference numeral 2' denotes a container body, reference numeral 6 'denotes a hinge, reference numerals 4' and 5 'denote flanges). Each shown).

[0003] The automatic packaging of the egg E is performed as shown in FIG.
As shown in (B), while the container 1 ′ is opened and transported by the conveyor C, the eggs E are stored in the container body 2 ′, and then the lid 3 ′ is closed by the arm A. In this state, the flange 4 'of the container body 2' and the flange 5 'of the lid 3 are fixed by a stapler or the like at a position opposite to the hinge 6 in this state. There is an advantage that the packaging process can be simplified as compared with a case where the lid 3 ′ is manufactured separately from the container body 2 ′ (the fixing portion is indicated by reference numeral 15 ′).

[0004]

However, since this type of container 1 'is manufactured in an open state, and the hinge 6' is bent against its elasticity in the packaging process, If the weight of the contents to be stored is light, the hinge 6 'does not bend when the lid is closed with the arm A, and the entire container 1' is often turned over.

[0005] In particular, in the case of a container 1 'for packing eggs, both sides of the hinge 6' are sandwiched between the container body 2 'and the lid 3' because the storage portions 7 'and 8' for the eggs E need to be formed. In addition, since the inward shoulders 9 and 10 of the triangular shape in a plan view are formed at regular intervals, the rib effect of the inward shoulders 9 'and 10' spreads to the hinge 6 'and the hinge 6' The rigidity is increased, in other words, the stress with respect to the bending of the hinge portion 6 'is increased, so that the hinge portion 6' is hardly bent, and the container 1 'is turned over in the step of closing the lid 3'. There were many accidents (when the container 1 'was turned upside down in the packaging process of the egg E, the egg E was scattered and cracked, which took a lot of trouble to clean up).

In this case, in order to improve the ventilation inside the container 1 'when the lid is closed, the inward shoulders 9' and 10 'on both sides of the hinge 6' are sandwiched by the flanges 4 'and 4'. 5 '
In this case, since the rib effect of the inward shoulders 9 ′ and 10 ′ becomes large (the rigidity of the hinge 6 ′ becomes high), the container 1 in the closing process is closed. 'Turned upside down accident was more pronounced. Also, as the size of the egg E became smaller, the container 1 'was more likely to be turned over.

[0007] In the conventional egg packaging container 1 ', when the lid 3' is closed, the hinge 6 'is hardly bent at the portions located at the inward shoulders 9' and 10 ', and is not bent at other portions. When the lid 3 'is closed, as shown in FIG. 13B, the outer edge of the hinge portion 6' is flat at the location of the inward shoulder portions 9, 10 'in plan view, as shown in FIG. It is convex and concave so that it protrudes outward and retracts inward at other parts. From this point, the rib effect of the inward shoulders 9 'and 10' acts strongly on the hinge 6 '. You can see that.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a container in which a lid is integrally connected to a container body so that the lid can be closed with a light force.

[0009]

In order to achieve this object, the present invention provides a synthetic resin having a lid integrally connected to one side of an opening in a container body via a flexible hinge. In a container made of plastic, the portions on both sides of the hinge
At least at the point connected to the hinge, or the hinge
The fold line of the hinge part in addition to the part connected to the
The area including both sides is smaller than the width of the hinge.
Numerous protrusions or depressions or irregularities with a large diameter (or length)
Is formed as an embossed portion formed in a scattered dot shape . "

[0010]

With the configuration [Operation and Effect of the Invention] Thus, even when the rib effect to a portion of the opposite sides of the hinge, even without least Butterfly
A number of protrusions etc. are formed in a dotted shape at the part connected to the
By that form the embossed portions made Te, can be bent butterflies number portion with a light force. Reason why it is possible to bend the hinge portion with a light force, it is therefore blocked by the embossed portion an external force when bending the hinge portion acts on the outside of the hinge portion, centrally to the external force hinge of when lid In other words, the effect of the ribs on both sides of the hinge part spread to the hinge part .
Since therefore be blocked by the embossed portions made of projections or the like,
Further in other words, stress generated on both sides of the hinge portion is thus absorbed into the embossed portion when the bending of the hinge portion, the hinge portion
It is considered that a large stress is prevented from being generated at the fold line .

Therefore, according to the present invention, since the lid can be closed with a light force even though the lid is integrally connected to the container, the container may be turned over during the packaging process. It has the effect of preventing or significantly reducing. In particular, as described in claim 2, when applied to an egg packaging container formed by vacuum-forming a synthetic resin thin sheet, even if both sides of the hinge portion are formed in a complicated shape and the rib effect is large, the because that rib effect is spread to hinge portion can be offset to result effectively embossed portion,
It is suitable as an application example of the present invention.

Further, when the entire flange of the container body and the lid is formed as an embossed portion as described in claim 3, the embossed portion extends over the entire circumference of the container when the lid is closed and packaged. By forming the embossed portion , the embossed portion produces an aesthetic effect of a fringe pattern.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
Description will be made based on 1). 1 to 7 show a first embodiment applied to a container for packaging eggs, and a container denoted by reference numeral 1 is:
A container body 2 having a rectangular shape in a plan view and a lid 3 corresponding to the container body 2 are provided. Flanges 4, 5 are formed on the container body 2 and the lid 3, respectively, over the entire circumference, and one side of both flanges 4, 5 are integrated via a bendable hinge 6 formed in an arc-shaped cross section. It is connected in a way.

The container body 2 and the lid 3 are each formed with two rows of ten housing portions 7 and 8 in which the eggs E (see FIG. 6) are fitted approximately half each. On the inner peripheral edge of the lid 3, inward shoulders 9 and 10 each having a triangular shape in plan view are formed. In this case, as shown in FIG. 2, in order to secure a gap between the container body 12 and the lid 3 in the closed state to secure air permeability, the hinge 6
Inward shoulders 9 and 10 located on both sides of the
A little higher than.

It is not always necessary to provide the flanges 4 and 5 at the hinge 6, and the opening edge of the container body 2 and the opening edge of the lid 3 may be directly connected at the hinge 6. .
The flanges 4 and 5 of the container body 2 and the lid 3
And the inward shoulders 9 and 10 and the hinge 6
Ri and longitudinal side edges of both sides of the eyes, embossed portion 1
It is one. As shown in FIGS. 4 and 5 , the embossed portion 11 is much smaller than the width of the hinge 6.
A large number of circular recesses 11a having a small diameter are formed in the form of dots.
In FIGS. 1 and 7, the embossed portion 11 (the concave portion) is shown.
11a ) is indicated by a number of points,
2 and 3 and other embodiments, the embossed portion 11 is shown by a mesh.

A hinge-shaped opening thread 12 is attached to the hinge portion 6, and the thread portion 12 is pulled outward to tear open the hinge portion 6 so as to be opened. In the container 1, a flat synthetic resin thin sheet is placed on a mold formed into a shape into which the container 1 fits, and the synthetic resin thin sheet is vacuum-sucked from a number of suction holes formed in the mold. depending on the roughness of the mold intended to be manufactured by a vacuum molding method in which plastic deformation, during the molding, as shown by a chain line in FIG. 5, a plurality of suction holes 14 for forming depressions in the mold 13 puncture To form a recess 11a.

In the above configuration, in order to automatically wrap the eggs E in the container 1, as shown in FIG.
While transferring the container 1 in a state of being opened by the conveyor C,
First, the eggs E are stored in each storage room 7 of the container body 2,
Closing the lid 3 with the arm A, and fixing the flanges 4 and 5 of the container body 2 and the lid 3 at the part opposite to the hinge part 6 by stapling or heat fusion in that state. It is performed sequentially (fixed portions are indicated by reference numeral 15).

[0018] Thus, by having forms the longitudinal side edges of the part and the hinge part 6 of the both sides of the hinge portion 6 and d Nbosu shaped portion 11, because it is possible to deform the hinge 6 with a light force In addition, it is possible to prevent or significantly reduce the case where the container 1 is turned over in the step of closing the lid 3. Reason why it is possible to bend the hinge portion 6 a small force by forming the embossed portion 1 1, configured the embossed portion 11
The rib effect of the large number of recesses 11a formed makes it difficult for the portion on which the embossed portion 11 is formed to be deformed, and as a result, the rib effect of the inward shoulders 9, 10 and the like spreads to the hinge portion 6. because it is blocked by the embossed portion 1 1, in other words, by embossed portion 11 is hardly deformed, since the external force bent portion which is not the embossed portion 11 of the hinge portion 6 acts intensively, In other words, it is considered that the stress is absorbed by the embossed portion 11 at the time of bending, and the stress of the hinge portion 6 is reduced.
(Although the rib effect also occurs in the embossed portion 11 , each recess 1
Since 1a is small, its rib effect does not propagate to the hinge 6. 13) Since the rib effect of the inward shoulders 9 and 10 does not spread to the hinge 6, when the lid 3 is closed, the hinge 6 becomes uneven in plan view as shown in FIG. There is no deformation, and the outer edge of the hinge 6 extends linearly in plan view as shown in FIG.

When both the longitudinal edges of the hinge 6 are formed as the embossed portions 11 as in the first embodiment, the portions of the hinge 6 along the fold line not formed with the embossed portions 11 are formed. Mainly bend. In the above embodiment, the inward shoulders 9 and 10 located on both sides of the hinge 6 are protruded from the flanges 4 and 5, however, as shown in FIG. It goes without saying that the inward shoulders 9 and 10 may be at the same height as the flanges 4 and 5.

When the horizontal width of the hinge portion 6 is large, the embossed portions 11 may be formed on both longitudinal side edges of the hinge portion 6 as in the first embodiment, but FIG. as shown by way of example, without forming the embossed portion 1 1 in the hinge portion 6, and both sides of the site of flange 4, 5 of the hinge portion 6 in Hirohaba, the flange 4, 5 et Nbosu shaped portion 11 and this <br/> forming that it is desirable.

Further, the form of the embossed portion 11 is as follows.
Not limited to the formation of a large number of indentations 11a, or form a number of projections are than be or form the fine irregularities, further, the planar shape of the uneven portion such as the indentations or protrusions,
Various shapes can be set such as a rectangular shape as shown by reference numeral 11b in the fourth embodiment of FIG.
When the protrusions and dents 11b are formed in a non-circular shape in this manner,
The length is hinged so that it is clearer
6 is smaller than the width dimension.

Although each of the above embodiments is applied to a container for packaging eggs, the present invention relates to a container made of a synthetic resin having a hinge, such as a box-shaped container as shown in FIG. It goes without saying that it is generally applicable. Needless to say, the egg packaging container includes not only a chicken egg packaging container but also a quail egg packaging container. Further, the present invention is particularly suitable for containers manufactured by vacuum forming,
Needless to say, the present invention can be applied to a container manufactured by injection molding.

[Brief description of the drawings]

FIG. 1 is a perspective view of a container (a container for packing eggs) according to a first embodiment.

FIG. 2 is a partially enlarged view of FIG.

FIG. 3 is an enlarged plan view of a main part of FIG. 1;

FIG. 4 is a partially enlarged view of a hinge part.

FIG. 5 is a sectional view taken along line VV of FIG. 4;

6A is a view showing a step of closing a lid, FIG. 6B is an enlarged view of a hinge part in the middle of closing, and FIG. 6C is a view of a hinge part in a state where the lid is completely closed. .

FIG. 7 is a plan view of the container with the lid closed.

FIG. 8 is a partial perspective view of the second embodiment.

FIG. 9 is a partial perspective view of the third embodiment.

FIG. 10 is a partial plan view of the fourth embodiment.

FIG. 11 is a perspective view of a fifth embodiment.

FIG. 12 is a view showing a conventional example, where (A) is a perspective view of a container,
(B) is a diagram showing a closed state in the packaging process.

13A is a partially enlarged perspective view of a conventional example, and FIG. 13B is a plan view in a closed state.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Container 2 Container main body 3 Lid 4,5 Flange 6 Hinge part 7,8 Housing part 9,10 Inward shoulder part 11 Embossed part 11a Depression

Claims (3)

(57) [Claims] 1. A synthetic resin container in which a lid is integrally connected to one side of an opening in a container main body via a flexible hinge portion, of a portion on both sides of the hinge portion. Hinges at least
Or connected to the hinge
In addition, the part of the hinge that includes both sides of the fold line
With a diameter (or length) smaller than the width of the hinge
A large number of protrusions or dents or irregularities
A synthetic resin container with a lid, characterized in that the container has an embossed portion . 2. The container according to claim 1, wherein the container is an egg packaging container manufactured by vacuum-forming a synthetic resin thin sheet, wherein the container body and the lid have approximately half an egg. A container made of a synthetic resin with a lid, wherein a plurality of storage portions fitted one by one are formed so as to overlap each other in a closed state. 3. The container body and the lid according to claim 1 or 2, wherein a flange is formed at an opening edge of the container body and the lid so as to overlap each other in a closed state. the whole of the flange said embossed body and formed in
Lid with a synthetic resin container, characterized in that the.