JPH0326127Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention relates to improvement of packaging containers.

(Prior Art) Containers used for packaging fresh foods such as meat, fish, vegetables, etc. are, for example, made of a resin foam sheet and have a bottom wall and a side wall surrounding the bottom wall. These packaging containers have been widely used in the past, and in many cases, after storing perishable foods and other items inside, such packaging containers
By covering the exposed surface of the food product or other food item to the side wall of the container with a thin stretchable synthetic resin film made of polyvinyl chloride, polyethylene, etc., the product can be displayed in a show case or the like.

(Problem to be solved by the invention) By the way, when packaging using such a packaging container, in order to ensure sufficient adhesion of the synthetic resin thin film to the side wall of the container, it is generally necessary to Before storing, for example, when 50 to 100 containers are stacked, adhesive can be sprayed onto the margin provided on the outer circumferential surface of the upper end of each container, or the adhesive can be applied at once using a brush, roll, etc. By using a coating process, conventional packaging containers are
Because the container did not have a means to effectively prevent misalignment of a large number of stacked containers, due to the misalignment, no or almost no adhesive was applied to the adhesive margin on one or more sides of the container, or On the contrary, adhesive is often applied to excess areas, resulting in accidental peeling of the synthetic resin thin film,
There were problems such as adhesion of containers to each other after packaging, stickiness of the containers, and sometimes sticking of hands touching the containers. In addition, in this conventional packaging container, when stacked, the vertical margins are very close to each other all around the container, or
The upper margin will fit somewhat inside the lower margin, so the adhesive applied to the upper margin will remain in the contact area of both containers, or the adhesive applied to the upper margin will be stuck inside the lower margin. It flowed down into the narrow gap between the outer circumferential surface and the inner circumferential surface of the adhesive portion of the lower container and solidified there, which often caused the two containers to be adhered to each other.
Once a container is glued in this way, special man-hours are required to peel it off, and if the glue is particularly strong on the edges of the container where the rigidity is low, However, there was a problem that the container would be damaged during the separation.

This invention advantageously solves the above-mentioned problems, and provides a packaging container in which adhesive can be applied adequately and in which mutual adhesion of the containers can be advantageously prevented. The purpose is to

(Means for Solving the Problem) The packaging container of this invention has an outer periphery at the upper end of the container main body, which is formed integrally with a bottom wall and side walls that are inclined in a direction that gradually expands upward. The surface is provided with a circumferentially continuous adhesive portion that is approximately perpendicular to the bottom wall, and the lower surface of this adhesive portion can be brought into contact with the upper edge of the container located below, and the adhesive portion is The width is reduced from the lower side of the container body at a portion of the container body excluding each corner, and the width is decreased downwardly from the lower side of the container body at a position below the adhesive portion and on the outer surface of at least each corner of the container body. A positioning protrusion is provided that fits into the container in which it is located and makes surface contact with the inner circumferential surface of the upper end thereof.

(Function) In this packaging container, when the packaging containers are stacked, the positioning protrusion of the upper container comes into surface contact with the inner peripheral surface of the upper end of the container located below it with a sufficiently wide area, and this surface contact Since the molding is carried out reliably at each corner of the containers, which has particularly high molding accuracy, it is possible to sufficiently prevent containers from shifting when stacking them. Can be applied properly.

Moreover, according to this container, when the containers are positioned relative to each other as described above, especially at each corner of the container, the upper edge of the lower container, or in other words, the upper edge of the margin of the lower container, touches the lower surface of the margin of the upper container. By contacting each other, in conjunction with the positioning contact between the upper and lower containers, the adhesive applied to the respective adhesive areas is effectively prevented from infiltrating between the upper and lower containers. This will sufficiently prevent adhesion between the upper and lower containers.

Furthermore, by reducing the width of the adhesive part of the container by shifting it toward the upper edge of the container except for each corner position, when stacking the containers, the width of the adhesive part of the upper and lower containers is reduced. By separating the side portions by a predetermined distance in the vertical direction, even if the adhesive applied to the upper margin portion flows down, the adhesive will not come into contact with the upper edge of the lower margin portion. Of course, under the action of the above-mentioned positioning protrusion, the upper container is positioned at a considerable distance from the inner circumferential surface of the lower container into which it is fitted toward the inside of the container. Since the adhesive flowing down can be solidified without contacting the inner circumferential surface of the lower container, there is no risk that the upper and lower containers will be bonded to each other at their side portions. Therefore, here:
It is possible to sufficiently eliminate the risk of damage to the container due to the upper and lower containers being adhered to each other.

(Example) This invention will be explained below based on the drawings.

FIG. 1 is a perspective view showing one embodiment of this invention, and FIGS. 2 and 3 are respectively a corner sectional view and a side portion of two packaging containers of this embodiment stacked together. FIG.

In FIG. 1, 1 is a deep-bottomed packaging container made of expanded polystyrene sheet having a thickness of 2 to 3 mm, 2 is a bottom wall of the container 1 having a substantially rectangular planar shape, and 3 is:
This example shows side walls that are integral with the bottom wall 2 and diverge upwardly at an inclination angle of 20 to 70° relative to the bottom wall 2. In this case, in the container main body portion consisting of the bottom wall 2 and the side wall 3, a margin portion 4 is provided on the outer circumferential surface of the upper end of the side wall 3, which is substantially perpendicular to the bottom wall 2.
are provided continuously in the circumferential direction. This adhesive margin 4 allows adhesive to be applied to the packaging container 1 when a large number of packaging containers 1 are stacked, for example, in order to improve the adhesion when adhering the elastic synthetic resin thin film to the packaging container 1. It works as expected.

A positioning protrusion 5 is provided at a position below this margin portion 4, at least at each corner of the container body portion, and protrudes outward from the side wall 3 by a smaller amount than the margin portion 4. Here, this positioning part 5
is the amount of protrusion that allows the outer circumferential surface of the positioning protrusion 5a of the upper container 1a to just come into surface contact with the inner circumferential surface of the margin portion 4b of the lower container 1b when the containers are stacked as shown in FIG. It is molded so as to protrude to the outside of the side wall 3. In the illustrated example of FIG. 1, the positioning protrusion 5 is provided not only at the corner B but also on the short side of the rectangular contour to increase the rigidity of the container 1 and improve the strength of the container. ing.

Furthermore, here, the width of the margin portion 4 is narrowed by having a lower part 6 at a portion other than the corner B, and is shifted toward the upper edge side of the container body, and this lowered surface is used as the lower part of the side wall 3. Extend in the same plane as the surface or to a position inside the container. As shown in FIG. 3, this abutting portion 6 forms a considerable gap in the vertical direction between the outer peripheral surface of the margin portion of the upper container 1a and the inner peripheral surface of the margin portion of the lower container 1b. Alternatively, or in addition, the positioning protrusion 5
As a result of this action, the upper and lower container body portions are positioned with a sufficient distance in the inner and outer directions, thereby effectively adhering the two containers caused by the adhesive applied to the adhesive portion 4a flowing down. To prevent. This makes it possible to advantageously avoid deformation or breakage of the side portion A, which has particularly low rigidity, when separating the stacked packaging containers.

In addition, at the four corners of the packaging container 1, the upper edge of the adhesive part of the lower container 1b is in contact with the lower surface of the adhesive part of the upper container 1a, and the positioning protrusion 5 of the upper container is in contact with the lower surface of the adhesive part of the upper container 1a. By making surface contact with the inner circumferential surface of the upper container, it is possible to effectively prevent the adhesive applied to the adhesive portion of the upper container from penetrating between the upper and lower containers, and to sufficiently prevent adhesion between the two. .

By the way, even if both containers are glued together at the margins due to the retention of adhesive between the respective margins of the upper and lower containers, each corner of the container has relatively high rigidity, so the containers will not interact with each other. Separation is relatively easy and there is no risk of damage to the container.

Although this invention has been described above based on the illustrated example, the dimensions and shapes of the positioning protrusion and the lower part can be changed depending on the inclination angle of the side wall, the planar contour shape of the packaging container, etc.

(Effect of the invention) Therefore, according to this invention, a positioning protrusion protruding from the outer circumferential surface of the upper end of the packaging container is provided at least at the corner, and the positioning protrusion is provided on the inner circumferential surface of the lower container. In a state of surface contact, the upper edge of the lower container is brought into contact with the lower surface of the adhesive part of the upper container, and the width of the adhesive part is adjusted at the position of the side part.
By reducing the container body from the bottom side,
Not only can the containers be positioned well when stacked to ensure proper adhesive application, but also can effectively prevent stacked packaging containers from adhering to each other, and therefore prevent their separation from each other. This can be easily done without causing damage to the container or the like.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the packaging container of this invention;
FIGS. 2 and 3 are a corner sectional view and a side partial sectional view, respectively, showing a stacked state of the packaging containers. 1...Packaging container, 2...Bottom wall, 3...Side wall,
4...Gluing margin, 5...Positioning protrusion, 6...
...The lower part, A...The side part, B...The corner part.

Claims (1)

[Scope of utility model registration request] A margin portion that is approximately perpendicular to the bottom wall is provided on the outer peripheral surface of the upper end of the container main body, which is formed by integrally forming the bottom wall and each side wall that is inclined in a direction that gradually expands upward. The lower surface of this margin can be brought into contact with the upper edge of the container located below, and the width of the margin is determined by the width of the container excluding each corner of the container body. Decrease from the lower side of the main body part,
Further, at a position below the adhesive portion, a positioning protrusion is provided on the outer surface of at least each corner of the container body portion to fit into the container located below and come into surface contact with the inner circumferential surface of the upper end thereof. A packaging container.