JP2000062748A - Packaging container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a lid from being unexpectedly opened, and to allow the outside air to flow in by providing a slit in a hinge part to pivotably attach a container body and a lid body, providing outer flanges to be abutted on the container body and an edge part of the lid body, respectively, and providing a recessed part or a projecting part to be fitted and locked to both outer flanges, respectively. SOLUTION: A packaging container is formed by continuously provided a lid body 3 on one side of a container body 1 through a hinge part 2. A slit 4 is formed in the hinge part 2, and a plurality of joining parts 5 are provided with equal intervals. Outer flanges 6, 7 are formed on a mouth edge part of the container body 1 and the lid body 3, and a projecting part 8 and a recessed part 9 to be fitted and locked to each other are formed on these center parts. A peripheral wall 10 is suspended from a peripheral edge of the outer flange 7 on the lid body 3 side over the whole length to cover an edge part of the outer flange 6 on the container body 1 side when the lid is closed. Exposure of the edges of the outer flanges is eliminated to prevent injuries. Since the slit 4 is formed in the hinge part 2, neither the force in the lid- closing direction or nor the force in the lid-opening direction is exerted in the lid body 3, and thus, both the lid-opened condition and the lid-closed condition can surely be kept.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging container made of a plastic sheet, in which a container body and a lid are integrally formed.

[0002]

2. Description of the Related Art Conventionally, in this type of packaging container, the container body and the lid are joined to each other over the entire length of the hinge portion, and the lid is normally half-opened. Also,
The outer rims provided on the container body and the lid body have their peripheral edges exposed.

[0003]

It is preferable that the packaging container keeps the lid completely opened when the contents are taken in and out. However, in the conventional container, the container body and the lid are joined over the entire length of the hinge portion,
Since the lid is half opened in this state, it is necessary to hold the lid open with one hand when the contents are taken in and out. Then, in the closed state, the force for restoring the lid body to the half-opened state works, and the lid body may be opened accidentally. Particularly, in a container in which a concave portion and a convex portion which are fitted and locked to the outer collar of the container body and the lid body are provided to close the lid, the edge portion of the concave portion is deformed while the lid is repeatedly opened and closed,
The locked state becomes loose and the lid can be easily opened. Moreover, since the edge of the outer collar is exposed, there is a risk of injury at the edge of the outer collar.

[0004]

According to the present invention, in a plastic sheet container in which a container body and a lid are integrally molded via a hinge portion, a slit is provided in the hinge portion,
Outer collars that are in contact with each other are provided at the edges of the container body and the lid, respectively, and a concave portion or a convex portion that engages with and engages with each other is provided on both outer collars. It is preferable that the recess has a pair of long edges and a pair of single edges, and that the length of the long edge is longer than the length of the corresponding edge of the protrusion (claim 2). According to a third aspect of the present invention, the peripheral wall that covers the edge portion of the outer flange of either the container body or the lid is provided.

[0005]

In the present invention, since the hinge is provided with the slit, the lid is not biased in either the closing direction or the opening direction. Therefore, either the open state or the closed state is maintained without supporting it with hands. Therefore, by holding the lid in the open state, the contents can be easily taken in and out, and even when the lid is closed, no force in the lid opening direction is applied to the fitting locking portion, so that accidental opening is prevented. Here, when the length of the long edge of the concave portion is made longer than the length of the corresponding edge of the convex portion as in the invention of claim 2, the long edge of the concave portion is deformed without difficulty when the convex portion is fitted. And retains resilience,
It is possible to prevent the locking force of the fitting locking portion from being lowered, and to prevent the accidental opening of the lid. In the invention of claim 3,
Since the edge of the outer collar is covered with the peripheral wall, injury is prevented.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the drawings, a lid 3 is connected to one side of a container body 1 via a hinge portion 2 to form a packaging container. This packaging container is a molded plastic sheet.

Slits 4 are formed in the hinge portion 2 and a plurality of joint portions 5 are provided at equal intervals. The relationship between the lengths of the slit 4 and the joint portion 5 may be such that the lid body 3 can hold both the opened state and the closed state. The specific length depends on the material and thickness of the material.

At the rims of the container body 1 and the lid body 3,
Outer collars 6 and 7 are formed respectively. These outer collars 6, 7
At the center of the, there are formed a convex portion 8 and a concave portion 9 which are fitted and locked to each other. In the figure, a recess 9 is formed on the outer collar 6 of the container body.
Although the convex portion 8 is provided on the outer collar of the lid, it may be reversed.
The convex portion 8 has a square tip surface, the peripheral wall thereof has a taper with a bulge on the tip surface side, and the concave portion 9 has a rectangular opening portion, and the peripheral wall has a taper of which the opening side is narrowed. None, the convex portion 8 and the concave portion 9 can be locked.

Here, as shown in FIG. 4, the width H of the opening of the concave portion 9 is slightly shorter than the width h of the tip end surface of the convex portion 8 and they are locked to each other. On the other hand, the length L of the opening of the concave portion 9 is longer (about twice) than the length l of the edge of the tip surface of the convex portion 8. With such a configuration, when the protrusion 8 is fitted into the recess 9, the edge 9a of the opening longer than the length of the protrusion 8 can be easily deformed to pass the protrusion 8. . After the protrusion 8 has passed, the edge 9a of the opening returns to its original state by elasticity and engages with the protrusion 8.

A peripheral wall 10 hangs over the entire circumference of the outer collar 7 of the lid body 3, and when the lid is closed, the outer collar 6 of the container body 1 is closed.
The edges are covered. With this structure, the outer brim edge is not exposed and injury is prevented. A peripheral wall may be formed on the outer collar 6 of the container body 1 so as to cover the peripheral edge of the outer collar 7 of the lid.

In the above embodiment, since the slit 4 is formed in the hinge portion 2, neither force in the closing direction nor force in the opening direction acts on the lid. Therefore, the opened state and the closed state can be held. Therefore, when the contents are taken in and out, the opened state can be maintained without supporting it by hand, so that the work of taking in and out is easy and the workability is improved. Further, since the force in the lid opening direction does not work when the lid is closed, the force for releasing the locking due to the concave and convex fitting between the lid body and the container body does not work. Therefore, the closed state can be maintained with a relatively small locking force, and accidental opening can be prevented.

The slit also functions as an inflow path for outside air. That is, the presence of the slit allows the inflow of outside air even when the container is closed. Therefore, it is suitable for packaging fruits, vegetables, and fresh flowers. From this viewpoint, it is preferable that the slit 4 has an appropriate width so that the inflow of outside air is promoted.

As described above, although the closed state is maintained by providing the slit in the hinge portion, the length of the opening of the concave portion is made longer than the length of the tip end surface of the convex portion. With the addition of the invention described above, the closed state can be maintained more reliably. That is, in the above embodiment,
Since the edge 9a of the opening of the recess 9 is longer than the length of the edge of the tip surface of the corresponding projection 6, when the projection 8 passes through the narrowed opening of the recess 9, the opening is Deforms easily. Therefore, the restoring force is maintained, and the opening of the concave portion 9 returns to the original state after passing through the convex portion. The recess 9 is unlikely to be plastically deformed even if the protrusion is repeatedly attached and detached a plurality of times. Therefore, the engagement locking force between the convex portion 8 and the concave portion 9 is not reduced.
This and the fact that no force acts on the lid body 3 in the lid opening direction ensures that the closed state is maintained.

In the above embodiment, the tip end surface of the convex portion has a square shape and the opening portion of the concave portion has a rectangular shape, but the shapes are not limited. The point is that the edge of the opening of the recess that engages with the protrusion is longer than the length of the tip surface of the corresponding protrusion. For example, the vertical and horizontal relationship is reversed from the above embodiment,
As shown in FIG. 5, the tip surface of the convex portion 8 has an elliptical shape, and the length l of the opening of the concave portion 9 is made longer than the length L of the major axis of the tip surface of the convex portion 8, as shown in FIG. The embodiment of claim 2 includes a case where the tip surface of the convex portion is circular and the length l of the opening of the concave portion 9 is longer than the diameter of the tip surface of the convex portion 8.

[0015]

According to the present invention, since the hinge portion receives the slit, neither force in the opening direction nor force in the closing direction acts on the lid. Therefore, it is possible to hold both the opened state and the closed state. Therefore, when the lid is closed by the fitting and locking due to the unevenness, the force in the opened state does not work, so that the accidental opening can be prevented. Also,
The presence of slits allows the outside air to flow in, making it suitable for packaging fruits, vegetables, and fresh flowers. Further, according to the second aspect of the present invention, since the concave portion returns to the original state without being plastically deformed even when the attachment and detachment of the concave-convex fitting portion is repeated a plurality of times, the initial locked state can be obtained, and the lid is accidentally opened. Is reliably prevented. Further, according to the invention of claim 3, the peripheral edge of the outer collar is not exposed, so that the injury is prevented.

[Brief description of drawings]

FIG. 1 is a perspective view of an open state of an embodiment of the present invention.

FIG. 2 is a perspective view of the same closed state.

FIG. 3 is a cross-sectional view of a fitting state of a concave-convex fitting part.

FIG. 4 is a plan view of a recess.

FIG. 5 is a plan view of a concave portion when the tip surface of the convex portion is elliptical.

FIG. 6 is a plan view of a concave portion where the tip end surface of the convex portion is circular.

[Explanation of symbols]

1 container body 2 Hinge part 3 lid 4 slits 5 joints 6 outer tsuba 7 outer tsuba 8 convex 9 recess

Claims (3)

[Claims] 1. A plastic sheet container in which a container body and a lid body are integrally molded via a hinge portion, wherein a slit is provided in the hinge portion, and the container body and the lid body are in contact with each other at their edges. A packaging container in which a collar is provided, and a concave portion or a convex portion which is fitted and locked to each other is provided on both outer collars. 2. The recess has a pair of long edges and a pair of single edges,
The packaging container according to claim 1, wherein the length of the long edge is longer than the length of the corresponding edge of the convex portion. 3. The packaging container according to claim 1 or 2, wherein a peripheral wall that covers the edge of the other outer flange is provided on the edge of the outer flange of either the container body or the lid.