JPH10338254A - Container made of synthetic resin sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a container whose cover is easily fitted to the container body and also easily removed therefrom and in which the fitted state can be stably retained. SOLUTION: This container is provided with flanges mutually connected and an external fitting edge 14 and an internal folding-back edge 4. The filing part is formed to retain the fitted state of the container body 1 and the cover 8 by fixing respective parts of the fitting edge 14 and the folding-back edge 4 mutually. A curved face 16 recessed to the connecting direction is formed within the flange face of at least one corner at least in one flange. Fixing recesses 15 are formed at the edge within a nearly triangular range in plan view including the curved face 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container formed by molding a synthetic resin sheet (including a synthetic resin film), for example, a container for storing food by thermoforming such as pressurized vacuum.

[0002]

2. Description of the Related Art In general, a container formed by pressurized vacuum molding has an upper peripheral edge of a container body turned outward, and a lower peripheral edge of a lid as a fitting edge fitted outside the folded edge. In order to prevent the lid from coming off when inserted into the container body, an inward projection is formed at the lower end of the fitting edge, and in the fitted state, this projection climbs over the lower edge of the folded edge, The lower end is pressed and locked from the outside.

[0003]

According to the above construction, however, the lid can be fitted only by applying an external pressure so as to align the lid with the container body. Thus, the fitted state can be maintained. However, in order to remove the lid, it is necessary to separate the lid from the container body against the press-contact locking state of the protrusion and the folded edge. The lid is removed by hooking the fingertip on the lower edge of the fitting edge of the container.If the depth of the container body is small or the frictional resistance between the container and the gripping hand is small, the locked state It is difficult to release, and there is a risk that the container may be damaged if the user tries to forcibly remove the container, or the stored items may be scattered by the reaction of the release. The present invention provides a container having a configuration in which the lid can be easily fitted to the container body and the fitted state can be stably maintained, and the lid can be easily removed easily in order to solve the above problems. Things.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is directed to a container body having at least one of a flange and a flange which is fitted to each other and which has a fitting edge. Among them, a container made of a synthetic resin sheet has a configuration in which a curved surface depressed in the joining direction is formed in at least one corner of a flange surface. Further, the present invention has a flange joined to each other, an edge fitted to the outside and an edge fitted to the inside, and the lid and the container are locked by a part of the edges being locked to each other. A container body and a lid having a configuration in which a locking portion is formed so as to maintain a fitted state of the main body, wherein at least one of the flange portions has a joining direction in at least a flange surface at one corner. It is also possible to provide a container made of a synthetic resin sheet having a configuration in which a concave surface is formed in the concave portion, and the locking portion is formed at an edge within a substantially triangular range in a top view including the curved surface. It is a feature.

The degree of depression of the curved surface may be small. Further, the curved surface is preferably formed large within the flange surface at the corner, and is preferably formed as a curved surface having a circular contour including a perfect circle or an ellipse in a top view state, but having a shape other than a circle. Can also. It is preferable that the oval or the like is formed so as to be longer in the direction of both adjacent sides as viewed from the corner. A contour such as a circle may be formed so that the boundary between the curved surface and the surrounding flat surface is represented by an approximately square line, or may be formed to be continuous from the curved surface to the surrounding flat surface with a curved surface. . Further, it is preferable that the locking portion is formed as an extension formed by extending the edge of the edge fitted to the outside to be longer than the edge fitted to the inside. It is preferable to form the locking portion at an edge in a substantially triangular range when viewed from above.

[0006]

In the corner where the curved surface is formed, for example, the belly of the index finger is hooked on the edge of the edge fitted outside, and the belly of the same hand is put on the curved surface, and the thumb is lightly pressed. When the index finger is pulled in such a manner, the curved surface easily bends, and at the same time, the corners of the edges fitted to the outside easily open outward due to the bending of the curved surface and the pulling action of the index finger,
Since the locked state is easily released, if the index finger is pulled as it is, the engagement between the container body and the lid is easily released, and the lid can be easily opened.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention. Although the figure shows a container having a configuration in which the lid 8 is fitted to the outside of the container body 1, the reverse configuration is also possible. The container body 1 has a bottom surface 2 and a peripheral wall 3, and an upper portion of the peripheral wall 3 is turned outward to form a folded edge 4 having a substantially flat flange surface 5 and a hanging outer bent portion 6. . The bottom four corners are formed as slightly protruding downward projections 7,
This configuration is optional, and a reinforcing rib may be formed on the bottom surface or the peripheral surface, or a partition wall may be formed in the container.

The lid 8 has a top surface 9 and a peripheral wall 10 inclined downward. The lower part of the peripheral wall 10 is folded outward to form a flange surface 11 which is substantially joined to the flange surface 5, and an outer side of the outer bent portion 6. And a fitting edge 14 formed by connecting an extended portion 13 of a slightly longer length to the outer bent portion 12.
Is formed so as to be substantially the same height as the lower end of the outer bent portion 6 of the container main body in a state fitted to the container main body 1, and the four corners of the extension 13 continuously provided thereunder have A curved locking recess 15 is formed which projects slightly inward from the lower end of the bent portion 6, and furthermore, in the flange surface 11, the flange surface at one corner is almost fully filled in the joining direction (downward). A slightly concave curved surface 16 is formed large. The locking recess 15 is formed in an extended portion 13 within a substantially triangular range when viewed from above, which is virtually divided by an imaginary line A crossing from the inner side of the curved surface 16 to both adjacent sides. . Although not shown, a locking recess different from the locking recess 15 may be formed in the extension 13 outside the virtual line A.

The corner of the peripheral wall 10 of the lid 8 is formed as an appropriate concave wall 17 in FIG. 1, and the flange portion 11 at the corner is widened by this concave portion so that the curved surface 16 can be formed large. However, this configuration is optional. In addition, the four corners of the top surface 9 are formed as slight concave portions 18 on which the lower protruding portion 7 of the container body can be placed, so that the containers can be easily stacked in multiple stages, but this configuration is optional. It is also optional to form a reinforcing rib or a step on the top surface or the peripheral surface.

According to the container having the above structure, when the lid 8 is fitted to the container body 1, the fitting edge 14 of the lid 8 is fitted to the folded edge 4 of the container body 1 as shown in FIG. Since the concave portion 15 is locked to the lower end of the outer bent portion 6, the lid 8 does not come off. In order to remove the lid 8 in this state, the locking state of the locking concave portion 15 must be released, and the locking can be released by forcibly pulling out the container with a strong external force. There is a strong possibility that stored items (for example, foods) are scattered. To remove the lid 8, as shown in FIG.
If the tip of the extension 13 which is a corner edge of the curved surface 16 is lightly pushed up by an abdomen of the index finger (upward arrow), the curved surface 16 is pressed lightly (lower arrow) while touching the curved surface 16 with the abdomen of the thumb. The corner of the lid 8 is easily bent upward by being guided by the curve, and the locking concave portion 15 is released from the outer bent portion 6, so that the lid 8 can be lifted up and the lid 8 can be opened lightly as it is. Can be covered. This configuration is optimally applied to a deformable container, and is preferably applied to a container formed by vacuum and pressure forming.

[Brief description of the drawings]

FIG. 1 is a perspective view of an example container according to the present invention.

FIG. 2 is a cross-sectional view of the lid with an intermediate portion omitted.

FIG. 3 is a sectional view of a fitting portion showing a fitting state of a lid and a container body.

FIG. 4 is a cross-sectional view showing a process of releasing the locked state of the fitting portion of FIG. 3 and opening the lid.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Container main body 2 Bottom surface 3 Peripheral wall 4 Folding edge 5 Flange surface 6 Outer bent portion 7 Lower protruding portion 8 Lid 9 Top surface 10 Peripheral wall 11 Flange surface 12 Outer bent portion 13 Extension portion 14 Fitting edge 15 Locking recess 16 Curved surface 17 Concave wall 18 Concave surface A Virtual line

Claims (2)

[Claims] At least one of a flange of at least one of a container body and a lid having an edge to be fitted and having a flange to be joined to each other, and is recessed in a bonding direction in at least a corner of a flange surface. A container made of a synthetic resin sheet having a configuration having a curved surface. 2. A lid and a container body having a flange portion joined to each other, an edge portion fitted to the outside and an edge portion fitted to the inside, and a part of the edges is locked to each other. A container body and a lid having a configuration in which a locking portion is formed so as to maintain the fitting state of at least one of the flange portions, at least in a flange surface of one corner portion in a joining direction. A container made of a synthetic resin sheet having a configuration in which a concave curved surface is formed, and the locking portion is formed at an edge portion within a substantially triangular range in a top view including the curved surface.