JPH0212220Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a stretch packaging body, and more particularly to a packaging body that is easy to wrap and has a good appearance.

[Prior Art] Conventionally, a stretch package in which the contents are placed in a saucer and covered with a stretch film uses a saucer in which the opening edges of the four circumferential side walls are formed into a flat surface with a constant height. Ta. Stretch packaging has no wrinkles on the film surface and looks better when the film is stretched to every corner, so when wrapping, it was necessary to pull the stretch film strongly and quickly wrap it to avoid wrinkles as much as possible.

[Problems to be solved by the invention] However, in order to simplify packaging, the stretch film is made of a material with good adhesion so that it can be packaged without using adhesives or adhesive tapes.
Therefore, the films easily come into close contact with each other or the film and the saucer, which tends to cause wrinkles and sag. Once the film is in close contact with the package, it is almost impossible to slide the film in a direction parallel to the contact surface, so the film must be removed from the tray and repackaged. Therefore, there were problems in that it was difficult to package the film in a good-looking manner, and it took time and effort to prepare the film surface.

[Means for Solving the Problems] The present invention has been made in order to solve the above problems. Therefore, the present invention consists of a bottom wall and four circumferential side walls that are integrally connected to the bottom wall, and the upper edge of the side wall is sloped downward from the corner of the opening edge, and the center of the upper edge is the same as the corner. A plastic saucer is made by raising the upper edge to a height, folding the end of the upper edge outward, and forming a step below the upper edge at a certain height from the bottom wall to protrude inward from the saucer. This is a stretch packaging body which houses contents and is characterized in that the opening edge is closed and wrapped with a stretch film.

As the plastic forming the tray of the package of the present invention, it is preferable to use a sheet or foam of polystyrene, polyethylene, polypropylene, polyester, or the like. The size and depth of the saucer can be adjusted according to the contents.

The inclined portion of the upper edge of the side wall of the tray of the package of the present invention may be curved or straight.

[Function] The upper edge of the side wall of the package of the present invention is high at the corner and the center between the corners, and low between the corner and the center, so when stretch-wrapping, each corner The center portion and the film make point contact. As described above, when a saucer having a flat upper edge is used, the flat upper edge and the film come into line contact and are in close contact with each other, so that the film does not slip and easily wrinkles or sag. Since the present invention uses point contact, the degree of adhesion between the film and the saucer is as weak as an elbow, and the film can easily slide.
Therefore, wrapping can be done while adjusting the film surface, and wrinkles and sagging can be easily removed by sliding the film, making the packaging process as easy as possible.

In addition, in stretch packaging, the entire tray is usually wrapped in a strongly tensioned stretch film, so the opening edge of the tray is pulled inward by the film. The upper edge of the package of the present invention is high at the corners and the center, and has a concave part just at the upper edge, so these corner and center areas have good elasticity, and the film can be stretched after stretch wrapping. Pull the top edge outward to prevent the film from sagging.

On the other hand, the end portion of the upper edge portion is folded back to the outside, and this folded portion acts as a reinforcing rib to increase the strength of the saucer. Similarly, to reinforce the saucer, a step is provided below the upper edge of the four circumferential side walls and protrudes inward from the bottom wall at a constant height. In addition to reinforcing the tray, this step serves as a guide for the amount of stored items, and also serves as a stopper for the lid when placing the lid into the tray after storing the contents.

[Example] Hereinafter, specific examples of the present invention will be shown using drawings.

FIG. 1 is a perspective view showing an example of a saucer used in the package of the present invention. The downward slope of the upper edge 3 from the corner portion 4 and the central portion 5 is a curve. 6 is a step protruding inward from the saucer. FIG. 2 is a sectional view taken along a vertical plane passing through the center of the opposing side walls after this saucer has been stretch-wrapped. The folded portion 9 of the upper edge 3 and the step 6 prevent the saucer from being deformed by the film 8.

FIG. 3 is a side view of the saucer in the case of a straight line with a downward slope. The cross section of this saucer is almost the same as that in FIG.

[Effects of the invention] The packaging body of the present invention has a point contact between the stretch film and the upper edge of the saucer during stretch packaging, so the film is easy to slip, and the packaging body is good-looking and durable without wrinkles or sagging. Moreover, the packaging process is very easy.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an example of a plastic tray used in a package according to the present invention, and Fig. 2 is a perspective view showing an example of a plastic tray used in a package according to the present invention. FIG. 3 is a cross-sectional view taken along a vertical plane passing through the center of the facing side wall, and FIG. 3 is a side view showing an example of a plastic saucer different from that shown in FIG.

Claims (1)

[Scope of utility model registration request] Consisting of a bottom wall and four peripheral side walls integrally connected to the bottom wall, the upper edge of the side wall is sloped downward from the corner of the opening edge, and the center of the upper edge rises to the same height as the corner. furthermore, the contents are stored in a plastic saucer formed by folding back the end of the upper edge outward and forming a step below the upper edge at a certain height from the bottom wall projecting inward of the saucer, A stretch packaging body characterized in that the opening edge is closed and wrapped with a stretch film.