JP2014091540A - Packaging container - Google Patents

Abstract

A range-up packaging container having increased strength against deformation during use in a container using a paper container body.
SOLUTION: In a packaging container 2 in which a synthetic resin lid 20 is fitted to a paper container body 10A, between a side wall protruding portion 22A and a skirt portion 24 formed at a lower end portion of the side wall of the lid 20. A range-up packaging container in which the curled portion 13 formed on the peripheral edge of the container body 10 is positioned and the locking concave portion 25 formed in the skirt portion 24 is locked to the lower side of the curled portion 13.
[Selection] Figure 4

Description

  The present invention relates to a packaging container. More specifically, the present invention relates to a strength technique at the time of use of a range-up packaging container in which food or the like is stored.

  2. Description of the Related Art Conventionally, packaging containers that use a paper container body have been used as containers that are used for foods that are eaten after being ranged. Various foods such as gratin, doria, soup and the like are accommodated in the packaging container.

  Since the paper container body has heat resistance compared to the synthetic resin container body, the container will not be deformed by the temperature rise of the contents even if the food stored in the container is ranged, Since the rigidity is small, there is a problem that it is easily deformed by the weight of the content itself or an external force when the container is held.

Under such circumstances, there has been proposed a technique for improving the strength by improving the shape of the paper container main body.
4 to 7 of Patent Document 1 disclose a packaging container in which the width of a flange is wider than a straight portion and a recess is formed in the corner flange in a rectangular paper container body. As a conventional container, a combined structure of a paper container main body and a simple lid having no fitting structure is disclosed in FIG. (See Figure 9)
Also in Patent Document 2, FIGS. 1 to 3, 10, and 11 disclose a packaging container in which the width of the flange is changed and a recess is formed in the flange. (See Figure 10)
1 to 3 of Patent Document 3 disclose a packaging container in which a concave line is provided around the outer peripheral winding of a paper container body. (See Figure 11)

Japanese Patent No. 3411951 Japanese Patent No. 3788595 Japanese Patent No. 4086333

  As shown in the above-mentioned patent document, there is a technique for improving the shape in order to increase the strength of the paper container main body, but the flange width is widened, the dent is formed in the flange, As a result, the problem is that the size of the entire container is increased and the mold structure and the manufacturing process are complicated.

  The main object of the present invention is to provide a container whose overall strength is increased by combining with a fitting lid without enlarging the container even if it is a paper container body.

In the present invention, a side wall protruding portion that protrudes downward is formed at the lower end portion of the side wall of the lid, a locking recess that bulges inward is formed in the skirt portion of the lid, and the side wall The protruding portion is positioned inside the curled portion formed at the upper end of the side wall of the container body, the skirt portion is positioned outside the curled portion formed in the container body, and the locking recess is locked to the lower side of the curled portion. It relates to a packaging container.
It is preferable that the container body has a configuration in which the side wall and the curl portion are continuously formed via a horizontal flange portion.
Even if the side wall protrusion part is formed in the intermittent state, the side wall protrusion part may be continuously formed over the perimeter.
In the case where the side wall protruding portion is formed in an intermittent state, it is preferable to have a configuration in which a ventilation groove continuous from the horizontal flange portion to the skirt portion is formed, and the side wall protruding portion extends over the entire circumference. In the case of continuous formation, it is preferable to have a structure in which a vent hole or a vent cut is formed in the top wall.

  ADVANTAGE OF THE INVENTION According to this invention, the packaging container for range up which increased the intensity | strength with respect to a deformation | transformation of a container is provided.

(A) is the whole sectional view of the container main part concerning a 1st embodiment of the present invention, and (B) is an important section enlarged view of (A). (A) is the whole sectional view of the lid concerning a 1st embodiment of the present invention, and (B) is an important section enlarged view of (A). (A) is the whole sectional view showing the state where the lid was fitted to the container main part concerning the 1st embodiment of the present invention, and (B) is the principal part enlarged view of (A). (A) is the whole sectional view showing the state where the lid was fitted to the container main part concerning the 2nd embodiment of the present invention, and (B) is the principal part enlarged view of (A). It is a top view of the lid concerning a 1st embodiment and a 2nd embodiment of the present invention. It is a top view of the lid concerning a 3rd embodiment of the present invention. (A) is a top view of a lid concerning a 4th embodiment of the present invention, and (B) is an important section expanded central sectional view of (A). (A) is a top view of the lid concerning a 5th embodiment of the present invention, and (B) is a top view of the lid concerning a modification of a 5th embodiment of the present invention. It is sectional drawing which showed the state which covered the cover to the conventional paper container. It is the top view which expanded the flange width in the conventional paper container. It is sectional drawing which provided the depression line | wire in the curl part in the conventional paper container.

  Hereinafter, preferred embodiments for carrying out the present invention will be described. In addition, embodiment described below shows an example of typical embodiment of this invention, and, thereby, the range of this invention is not interpreted narrowly.

1. 1st Embodiment The packaging container 10 which concerns on 1st Embodiment of this invention is demonstrated with reference to FIGS. 1-3. Drawing 1 is a sectional view of container main part 10 concerning a 1st embodiment, (A) is a full sectional view and (B) is an important section enlarged view of (A). 2A and 2B are cross-sectional views of the lid 20 according to the first embodiment, in which FIG. 2A is a full cross-sectional view and FIG. 2B is an enlarged view of a main part of FIG. FIG. 3 is a cross-sectional view showing a state in which the lid 20 is fitted to the container main body 10 according to the first embodiment, (A) is a full cross-sectional view, and (B) is an enlarged view of the main part of (A). .

  As shown in FIG. 1, the container body 10 includes a bottom wall 11, a side wall 12 erected around the bottom wall 11, and a curl portion 13 formed over the entire periphery of the upper end periphery of the side wall 12. As shown in FIG. 2, the lid 20 includes a top surface wall 21, a side wall 22 provided around the top surface wall 21, a horizontal flange portion 23 formed around the side wall 22, and a horizontal flange portion. 23, the packaging container 1 is covered with a container main body 10 having an open top surface and a container body 10 from above, as shown in FIG. It is comprised from the lid | cover 20 which obstruct | occludes opening of the main body 10 upper surface.

The container body 10 has a synthetic resin layer laminated on the inner surface or inner and outer surfaces of a paper base layer in order to absorb the contents and moisture in the air and prevent the opening diameter from changing ( Not shown). For the base material layer, for example, cup paper or card paper is used, and for the synthetic resin layer, for example, polyethylene resin, polystyrene resin, polypropylene resin or the like is used. Paper material of the container body 10 is appropriately set according to the type and storage amount or the like of the contents, it is preferable that particularly but not limited to the use of paper material of ^{300g / m 2 ~400g / m 2} .

  The lid 20 is made of a synthetic resin. As the synthetic resin, for example, various thermoplastic resins such as a polyethylene resin, a polystyrene resin, and a polypropylene resin can be used. The thickness (wall thickness) of the lid 20 is not particularly limited, but can be, for example, about 0.1 to 1.0 mm.

The forming method of the container body 10 is not particularly limited. For example, a single paper member may be press-molded to form a container body in which the bottom wall 11 and the side wall 12 are continuous, or the bottom wall 11 of another member. It is good also as a container main body which combined the side wall 12.
The method for forming the lid 20 is not particularly limited, and for example, the lid 20 can be formed by a known forming method such as vacuum forming or pressure forming.

The planar view shape of the packaging container 1 shown in FIG. 3 can be, for example, a circle, a rectangle, a polygon, or the like, and is not particularly limited.
The shape seen from the viewpoint of the height (depth) direction of the packaging container 1 is not particularly limited, and can be, for example, a dish shape, a bowl shape, a bowl shape, a cup shape, or the like.

As shown in FIG. 3, the lower end portion of the side wall 22 of the lid 20 is located inside the curled portion 13 formed on the container body 10 in a state where the lid 20 is fitted to the container body 10, and the curled portion 13. A side wall protruding portion 22A protruding downward from the upper end is formed, and the skirt portion 24 of the lid 20 is positioned outside the curled portion 13 formed on the container body 10 and is engaged with the curled portion 13 below. A recess 25 is formed.
That is, in a state where the lid 20 is fitted to the container body 10, the lid 20 sandwiches the curled portion 13 formed on the container body 10 between the side wall protruding portion 22 A and the skirt portion 24, and engages the lower side of the curled portion 13. By locking the retaining recess 25, the fitting state between the container body 10 and the lid 20 is maintained and the opening of the container body 10 is closed.

2. Second Embodiment A packaging container 2 according to a second embodiment of the present invention will be described with reference to FIG. (A) is the whole sectional view showing the state where lid 20 was fitted to container main part 10A concerning a 2nd embodiment of the present invention, and (B) is an important section enlarged view of (A).

10 A of container main bodies are formed as a structure with which the side wall 12 and the curl part 13 continued via the horizontal flange part 15. FIG. Since the curled portion 13 formed on the container body 10A needs to be sandwiched between the side wall protruding portion 22A and the skirt portion 24 formed on the lid 20, a horizontal flange is provided so that the inside of the curled portion can contact the side wall protruding portion 22A. It needs to protrude above the portion 15.
Since the configuration of the container body 10A other than the curled portion 13 and the horizontal flange portion 15 is the same as that of the container body 10 described in the first embodiment, the overlapping description thereof is omitted.

  FIG. 5 is a plan view of the lid 20 according to the first and second embodiments of the present invention.

  In the lid 20, the side wall protrusion 22 </ b> A protrudes downward from the side wall 22 in an intermittent state. In a state where the lid 20 is fitted to the container main body, the side wall protruding portion 22A is positioned in an intermittent state inside the curled portion 13 formed on the container main body, and the curled portion 13 formed on the container main body is connected to the side wall protruding portion 22A. The container body is sandwiched between the skirt portion 24 and the engagement recess 25 is engaged with the lower side of the curl portion 13 to maintain the fitting state between the container body and the lid 20 and close the opening of the container body. In FIG. 5, the side wall protrusions 22A are shown at 16 locations, but the number of side wall protrusions is not particularly limited.

3. Third Embodiment A lid 20B according to a third embodiment of the present invention will be described with reference to FIG. FIG. 6 is a plan view of a lid 20B according to the third embodiment of the present invention.

The lid 20 </ b> B has a side wall protruding portion 22 </ b> B formed at the lower end of the side wall 22 protruding downward continuously over the entire circumference. In a state where the lid 20B is fitted to the container main body, the side wall protruding portion 22B is located over the entire circumference of the curled portion 13 formed on the container main body, and the curled portion 13 formed on the container main body is connected to the side wall protruding portion. 22B and the skirt portion 24 are sandwiched, and the locking recess 25 is locked to the lower side of the curled portion 13, whereby the fitting state between the container body and the lid 20B is maintained and the opening of the container body is closed.
Since the configuration of the lid 20B other than the side wall protruding portion 22B is the same as that of the lid 20 described in the first embodiment, the overlapping description is omitted.

4). Fourth Embodiment A lid 20C according to a fourth embodiment of the present invention will be described with reference to FIG. (A) is a top view of lid 20C concerning a 4th embodiment of the present invention, and (B) is an important section expanded central sectional view of lid 20C.

The lid 20 </ b> C has a ventilation groove 26 continuous from the horizontal flange portion 23 to the skirt portion 24. The ventilation groove 26 is provided at a portion where the side wall protruding portion 22 </ b> A formed in an intermittent state is not provided at the lower end portion of the side wall 22. In FIG. 7, although the ventilation groove | channel 26 is represented by four places, the number of ventilation grooves is not specifically limited.
Since the configuration of the lid 20C other than the ventilation groove 26 is the same as that of the lid 20 described in the first embodiment, a duplicate description thereof is omitted.

5. Fifth Embodiment A lid according to a fifth embodiment of the present invention will be described with reference to FIG. FIG. 8A is a plan view of a lid 20D according to the fifth embodiment of the present invention, and FIG. 8B is a plan view of a lid 20E according to a modification of the fifth embodiment of the present invention.

The lid 20 </ b> D has one or more ventilation holes 27 formed in the top wall 21. Although the magnitude | size of the vent hole 27 is not specifically limited, The vapor | steam generate | occur | produced from the content should just be discharged | emitted, and when it considers that an insect and dust do not enter easily, 1 to 5 mm in diameter is preferable. Instead of the vent hole 27, one or more vent cuts 28 as shown in FIG. 8B may be formed. In the lid 27E, the cut shape is U-shaped, but the shape is not particularly limited.
Since the configuration other than the ventilation hole 27 in the lid 20D and the ventilation notch 28 in the lid 20E is the same as that of the lid 20 described in the first embodiment, the overlapping description is omitted.

    Hereinafter, the verification example which manufactured the packaging container of 2nd Embodiment and confirmed the strength-up effect with respect to a deformation | transformation of a container is demonstrated.

For the container body, a paper material in which a PBT (polybutylene terephthalate) resin (thickness 20 μm) was laminated on the inner surface of a cup paper (weight 320 g / m ² ) was used.
In order to absorb the eclectic at the time of molding, the above-mentioned paper material, in which recessed lines at equal intervals are preliminarily placed in the side wall portion of the container body, is press-molded (the side wall upper end diameter is about 157 mm after curling, curl The inner diameter of the container was about 162 mm, the outer diameter of the curled portion was about 174 mm, and the height was about 37 mm.

A biaxially stretched polystyrene sheet (thickness 0.35 mm) was used for the lid.
The sheet is formed into a cross-sectional shape having the same configuration as the packaging container of the second embodiment (see FIG. 4) (side wall protruding portion outer diameter 161.68 mm, skirt inner diameter 174.88 mm, height about 19.7 mm). A lid having a circular shape in plan view was manufactured by hot platen vacuum pressure forming using the mold manufactured as described above.

The curl width of the container body is about 6 mm ((174-162) / 2), and the distance between the inner surface of the skirt portion of the lid and the outer surface of the side wall protruding portion is 6.6 mm ((174.88-161.68) / 2). Therefore, the clearance between the gap between the inner surface of the skirt portion of the lid and the outer surface of the side wall protruding portion and the width of the curled portion of the container body when the lid is fitted to the container body is about 0.6 mm.
This degree of clearance is suitable for maintaining a fitting state with low resistance when the cover is put on the container body.

  While the contents (gratin about 300 g) were put in the container body of the manufactured packaging container to a height of about 2/3, it was lifted while holding the bottom and sides with fingers with both hands. It was recognized that the container body was distorted in an elliptical shape in plan view due to the weight of the contents and the external force received from both hands.

  The container body containing the contents was covered with a lid having no side wall protrusion at the lower end of the side wall, and similarly lifted while holding the bottom and side surfaces with both hands. The container was slightly elliptically deformed by the weight of the contents (expanded about 2 mm in length and narrowed about 2 mm in short axis), and when the container body was lightly pressed, the amount of deformation increased and the lid was easily removed.

  Cover the container body containing the contents with the lid of the second embodiment, and lift it while holding the bottom and sides with your fingers in the same way, but keep the shape before putting the contents without deforming the container Admitted to do. The lid did not come off when the side of the container body was pushed.

1, 2: Packaging container 10, 10A: Container body 12: Side wall 13: Curled portion 15: Horizontal flange portion 20, 20B, 20C, 20D, 20E: Lid 22: Side wall 22A: Side wall protruding portion 23: Horizontal flange portion 24 : Skirt portion 25: Locking recess

Claims (6)

A packaging container composed of a paper container body having an upper surface opened, and a synthetic resin lid that covers the container body from above and closes the opening of the container body upper surface,
The container body includes a bottom wall, a side wall provided upright around the bottom wall, and a curl portion formed over the entire periphery of the side wall upper end periphery.
The lid is composed of a top wall, a side wall provided around the top wall, a horizontal flange part formed around the side wall, and a skirt part hanging down around the horizontal flange part. ,
A side wall protruding portion protruding downward is provided at the lower end portion of the side wall of the lid, and a locking recess bulging inward is provided in the skirt portion of the lid,
In a state where the lid is fitted to the container main body, the side wall protruding portion is located inside the curled portion formed on the container main body and protrudes downward from the upper end of the curled portion, and the skirt portion is formed on the container main body. A packaging container, wherein the container is located outside the curled portion, and the locking recess is locked below the curled portion.   The packaging container according to claim 1, wherein the container body has a configuration in which a side wall and a curled portion are continuously formed via a horizontal flange portion.   The packaging container according to claim 1, wherein the lid has a side wall protrusion formed intermittently.   The packaging container according to claim 1, wherein the lid has a side wall protruding portion formed continuously over the entire circumference.   The packaging container according to claim 3, wherein the lid has a structure in which a ventilation groove that is continuous from the horizontal flange portion to the skirt portion is formed. The packaging container according to claim 4, wherein the lid has a structure in which a vent hole or a vent cut is formed in the top wall.

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