JPH0643012Y2 - Easy-to-open sealed container - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an easily openable sealed container which is a cup-shaped or deep-dish-shaped sheet molding container for packaging curry and other foods.

[Prior Art] As a container for packaging curry and other cooked or semi-cooked foods, etc., an annular sheet rib 103 surrounding the upper end opening of the container as shown in FIG. The portion 110 has a substantially smooth conical surface or curved surface. A lid (not shown) is sealed to the container body 101 with a sealing rib 103, and when the lid is opened, the lid is peeled in the peeling direction 108 from the outside toward the center of the container, and the lid is opened. The configured easy-opening sealed container is used.

On the other hand, an easily-openable sealed container made of such a molding container is a sheet molding container in which a sheet-shaped plastic material is pressed in a mold in a softened state by vacuum or compressed air, and a wall thickness of which is substantially uniform, It is convenient for stacking a large number of empty containers.

These molded containers are filled with cooked or semi-cooked food etc. by an automated machine, and consumers are
The whole container can be heated, or the container can also be used as tableware.

[Problems to be Solved by the Invention] However, in the easily openable hermetically sealed container including the sheet molding container, the outer wall is easily distorted because the wall of the body portion is relatively thin, has flexibility, and has low rigidity. . There is a problem that it is easily deformed when it is sterilized by a retort or a microwave oven, and it is dented by being shocked during transportation. In addition, since the easily openable hermetically-sealed container including the sheet-formed container has a low strength, it may rupture due to an increase in the internal pressure of the container when the contents are put in a microwave oven for heating.

In addition, such containers are difficult to handle due to their low rigidity, for example, it is considerably difficult to pick them up one by one without stacking them in the correct position in the filling machine or deforming them from the stacked state. .

In addition, as the conventional technology of the easily openable sealed container, 1987 utility model application publication No. 1105, 1985 patent application publication No. 172638 publication, 1985 utility model application publication No. 13691, There are those described in Japanese Patent Application Publication No. 95827 in 1981 and Utility Model Application Publication No. 97230 in 1981, but the technology of this technology is applied to the outside of the container body between the upper and lower parts. Since no boundary is formed, the rigidity of the container body is insufficient. In the technique of (1), the flange has a circular shape, and in order to form the corrugated portion on the sealing ridge, it is necessary to make a part of the flange project to the outside, and the flange becomes irregular. In the technique of (1), since the container body has a rectangular tube shape, the rigidity of the container body tends to be insufficient. Has not been fully considered for the formation of the crow mouth. The technique of can not be stacked in a state that the containers are partially inserted in the top and bottom.

From this, it is possible to compensate for the low rigidity and strength without using a special material and to have high rigidity against external pressure and internal pressure, little deformation, easy handling, and avoiding burst etc. It is desired to develop a sheet molding container that can be used.

The present invention has been made in view of the above circumstances, and is a sheet molding container having a small amount of a plastic material and a high rigidity against external pressure and internal pressure, which can be easily peeled off and can be easily opened in a microwave oven or the like. When heating the container, it is possible to prevent the container from bursting, and in the filling process of the contents, the positioning of the container with respect to the filling machine is reliable, and when saving the container before filling the contents, save space. It is an object of the present invention to provide an easily openable sealed container which can be picked up and can be picked up reliably.

[Means for Solving the Problems] In response to this purpose, the easily openable sealed container of the present invention is
An annular sealing rib is formed on the flange of a square or rectangular shape that surrounds the upper end opening that has a contour of a closed circle or an ellipse around the center line of the container body, and faces the corner of the flange of the sealing rib. The outer diameter of the lower end of the container body is smaller than the inner diameter of the upper opening, and when multiple molded containers are arranged vertically side by side, Is a molded container having an open upper end that can be stacked with the lower end of the molded container of (1) entering the upper opening of the lower molded container, and the container body has a boundary between an upper part located above and a lower part located below. Are vertically adjacent to each other at the boundary, and when the acute angle θa formed by the upper part with the center line and the acute angle θb formed by the lower part with the center line are measured in the same direction, θa <θb and the boundary is outside the container. Overhang and upper part A stacking step is formed between the flange and the container body, and the stacking step is formed in an annular shape projecting at a right angle to the center line, or has a diameter that increases rapidly in the direction of the center line. It is composed of a locking surface portion that extends outward in an additional annular shape and a rising surface portion that is connected to the outer edge of the locking surface portion and rises by the height of the stacking height.
In addition, the wall portion is formed so as to project outwardly across the container body and the stacking step portion, the inner surface communicates with the internal space of the container body, and the upper end is open. It is characterized by being formed as follows.

[Operation] In the easily openable sealed container of the present invention, after filling the contents,
Seal the lid with the sealing rib to seal it, then
Retort processed if necessary. A boundary protrudes outward from the container body, and the protruding boundary functions as a reinforcing rib to give rigidity to the container body.

[Embodiment] Hereinafter, the details of the present invention will be described with reference to the drawings illustrating an embodiment.

In FIG. 1, FIG. 2, FIG. 3, and FIG. 4, reference numeral 1 is a container body of an easily openable sealed container before sealing a lid (not shown). The container body 1 has an annular sealing rib 3 surrounding an upper end opening 2 having a substantially circular or elliptical contour. The sealing rib 3 is formed so as to protrude upward from an upper surface of a flange portion 7 having a substantially square or rectangular contour along an imaginary circle 5 having a radius R coaxial with the arc 6. The sealing rib 3 faces the apex angle of the corner of the flange 7 4
The crow mouth 4 is formed in one of the two parts, and the crow mouth 4 projects toward the outside of the imaginary circle 5 and is located on the normal line of the circle 5 with the outer edge of the contour point.
A ₁ , A ₂ , A ₃ , and A ₄ are located.

The container body 1 is a sheet forming container, and a synthetic resin sheet is pressed against a mold by vacuum or air in a softened state, and a flange portion 7 that is horizontally connected to the container body 8 and the upper end of the container body 8. It is a container with the upper end opened, which is integrally formed with and. The container body 8 is provided with a conical surface portion 11, a protruding portion 12, and a stacking step portion 13 on its side surface.

The conical surface portion 11 is composed of an upper portion 11a and a lower portion 11b each of which is composed of two substantially conical surfaces whose diameter increases upward in the direction of the axis 14. When the plurality of container main bodies 1 are stacked, the upper container main body is placed below. The upper and lower container bodies can be stacked in a state where a part of the container body is inserted.

A circular bottom 15 is connected to the lower end of the conical surface portion 11 to close the lower end.

As shown in FIG. 1 and FIG. 4, rotation preventing protrusions 12 are formed at a plurality of positions along the circumference of the upper end portion of the conical surface portion 11 at equal positions to form a part of the container body 8. Is formed.

That is, the projecting portions 12 are formed at a plurality of locations along the circumference of the upper end opening 2 on the same radius R as the corral 4 and projecting from the conical surface portion 11 and the stacking step portion 13 inside the corral 4.

The stacking step portion 13 has a horizontal annular shape, or a locking surface portion 16 that is formed by projecting outward in an annular shape with a diameter that increases abruptly upward in the axial direction 14 and a stacking height that is connected to the outer edge of the locking surface portion 16. and a rising surface portion 17 that rises by a height d.

Particularly importantly, the conical surface portion 11 has an upper portion 11a located above and a lower portion 11b located below, which are vertically adjacent to each other with a boundary 21 as a boundary. An acute angle θa formed by the upper portion 11a and the vertical line 22 and an acute angle θ formed by the lower portion 11b and the vertical line 22.
b is θa <θb when measured in the same direction.
Moreover, the boundary 21 projects outward from the conical surface portion 11.

[Effects of the Invention] In the easily openable sealed container configured as described above, since the boundary protruding outward from the container body functions as a reinforcing rib to give rigidity to the container body, external pressure or internal pressure is applied. In contrast, the ability to prevent deformation of the container body is improved.

Moreover, in the body of the present invention, the boundary is simply formed on the body wall in order to increase the rigidity, so that the material used is not increased and the structure of the container body is not complicated. Since the container body is cylindrical with a conical surface,
High rigidity.

Also, by making the upper end opening of the container body a circle or an ellipse, the flange a square or a rectangle, and the corral mouth of the sealing rib located at the corner of a square or a rectangle, it is not necessary to make the container flange a special shape. Also, it is possible to secure a space for providing a sealing crow mouth, and to secure a portion which is a tab for a person to pick up the lid with his / her finger at the time of the peeling opening in the vicinity of the crow mouth.

In addition, the upper and lower container bodies partly enter the mating side, and by adopting a structure in which the stacking step can reliably pick up one by one, the setting of the container in the filling machine can be made space-saving and Easy and reliable picking up of the container.

[Brief description of drawings]

FIG. 1 is a plan view showing a container body of an easily openable sealed container according to an embodiment of the present invention, FIG. 2 is a side view of a half section of the container body shown in FIG. 1, and FIG. FIG. 4 is an enlarged vertical cross-sectional view of the sealing rib portion of the container shown in FIG.
IV-IV part longitudinal cross-sectional view, FIG. 5 is an enlarged cross-sectional explanatory view near the boundary, and FIG. 6 is a vertical cross-sectional explanatory view showing the body of a conventional easy-open sealed container. 1 ... Container stopper, 2 ... Top opening, 3 ... Sealing rib, 4 ... Karasuguchi 5 ... Virtual circle, 6 ... Arc, 7 ... Flange, 8 ...
… Container body 11 …… Conical surface, 11a …… Upper part, 11b …… Lower part, 12 ……
Projection 13 …… Stack step, 14 …… Shaft, 15 …… Bottom, 16 …… Locking surface 17 …… Rising surface, 21 …… Boundary, 22 …… Vertical line

Claims (1)

[Scope of utility model registration request] 1. A ring-shaped sealing rib is formed on a substantially square or rectangular flange portion surrounding an upper end opening having a contour of a substantially circular or elliptic closed curve around the center line of the container body, and the sealing rib of the sealing rib is formed. A container body having a corrugated mouth is formed in a portion facing the corner of the flange, the outer diameter of the lower end of the container body is smaller than the inner diameter of the upper end opening,
In the case where a plurality of molding containers are arranged vertically adjacent to each other, the molding container having an open upper end that can be stacked with the lower end of the upper molding container entering the upper opening of the lower molding container, The upper part of the container body and the lower part of the lower part are vertically adjacent to each other with a boundary as a boundary, and the upper part forms an acute angle θa with the central straight line and the lower part forms the center line. When measured in the same direction as the formed acute angle θb, θa <θb, the boundary is projected to the outside of the container, and the stacking stepped portion forms the container body between the upper portion and the flange. The stack step portion is formed so as to make one round, and the stack step portion has an annular shape that projects at a right angle to the center line, or has a locking surface portion that increases in diameter upwardly in the center line direction and projects outward in an annular shape. Connected to the outer edge of the locking surface And a rising surface portion that rises by the height of the stacking height, and a wall portion is formed so as to project outwardly across the container body portion and the stack step portion, and an inner surface is formed in the inner space of the container body portion. An easily openable hermetically sealed container, characterized in that a protruding portion communicating with the upper end is formed so that the upper end is located inside the cap.