JP2001247122A - Paper tray - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a paper tray whose strength can be kept even if moisture is absorbed. SOLUTION: The paper tray comprises a base wall 1 and rising walls 2, 3 connected with respective peripheral sides thereof with the adjacent rising walls 2, 3 joined with each other, wherein rules R forming borders between facing walls 2 and the base wall 1 are arcuated. The arcuated rule R makes the base wall 1 and the rising wall 2 into an arch, thereby keeping necessary strength even if moisture is absorbed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper tray used for selling sashimi and the like.

[0002]

2. Description of the Related Art Generally, when selling sashimi or fish fillets, trays made of styrofoam or plastic are used. Such trays pollute the environment if discarded as they are, so they are collected separately. .
However, the work requires a great deal of labor and cost.

[0003]

For this reason, a paper tray that can be discarded together with garbage is desired. However, there is a problem that the strength of a box-shaped paper tray decreases when it gets wet.

Accordingly, an object of the present invention is to provide a paper tray which maintains its strength even if it absorbs moisture.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a paper tray in which rising walls are continuously provided on each side of a peripheral edge of a bottom wall, and adjacent rising walls are connected to each other.
The ruled line that bounds the opposing rising wall and bottom wall was curved in an arc shape.

[0006] In this tray, the bottom wall and the rising wall have an arch shape due to the curved ruled line, so that the necessary strength is secured even if moisture is absorbed.

[0007] A corrugated cardboard having a thickness of 1.5 mm or less is used as a material, and the radius of curvature of the curved ruled line is 100 m.
When the length is not less than m and not more than 300 mm, the material can be reliably bent along the ruled line.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS.

In the blank shown in FIG. 1, a pair of rising walls 2 and 3 are connected to each other on four sides of the bottom wall 1, and a ruled line R forming a boundary between the facing rising wall 2 and the bottom wall 1. Is curved outward in an arc shape. On each side edge of each rising wall 2, a passage piece 4 is provided continuously.

In order to assemble this blank, as shown in FIGS. 2 and 3, the rising walls 2 and 3 are erected with respect to the bottom wall 1 and the passage piece 4 is attached to the rising wall 3 and is adjacent thereto. The rising walls 2 and 3 are joined together.

In the tray assembled in this manner, the bottom wall 1 and the rising wall 2 are formed in an arch shape by the curved ruled line R, so that the necessary strength is secured even if moisture is absorbed.

In addition, since the water that has come out of the contents such as sashimi collects in the dents on both sides of the bottom wall 1, it is possible to prevent the contents from being damaged by the water remaining on the lower surface thereof.

When a corrugated cardboard having a thickness of 1.5 mm or less is used as the material, if the radius of curvature of the ruled line R is 100 mm or more and 300 mm or less, the material can be reliably bent along the ruled line R.

Next, a second embodiment of the present invention will be described with reference to FIGS.

In this embodiment, as shown in the blank of FIG. 4, the bottom wall 1 is tapered toward the front, and the rising wall 2,
3 is connected via a passage piece 4 having a fold at the center.

Then, as shown in FIGS. 5 and 6, when the rising walls 2 and 3 are erected with respect to the bottom wall 1 and the passage piece 4 is folded into two and adhered to the rising wall 3, a boat shape is obtained. Appearance and suitable for selling sashimi.

Next, a third embodiment of the present invention will be described with reference to FIGS.

In this embodiment, as shown in the blank of FIG. 7, the ruled lines R that border the rising walls 2 and 3 and the bottom wall 1 are both curved inward, and the rising walls 2 and 3 each have a central portion. Approaching 2
An arc-shaped ruled line S is formed.

Then, as shown in FIG. 8 to FIG. 10, the rising walls 2 and 3 are erected with respect to the bottom wall 1, the passage pieces 4 are attached to the rising wall 3, and the adjacent rising wall 2 is formed. , Join 3
When each of the rising walls 2 and 3 is bent inward along the ruled line S, the rising walls 2 and 3 also have excellent strength that is hardly bent.

[0020]

As described above, in the paper tray according to the present invention, since the ruled line forming the boundary between the opposed rising wall and the bottom wall is curved in an arc shape, the bottom wall and the rising wall are arched. The required strength is secured even if moisture is absorbed.

[Brief description of the drawings]

FIG. 1 is a diagram showing a blank according to a first embodiment.

FIG. 2 is a perspective view showing an assembled state of the same.

FIG. 3 is a vertical sectional front view of the above.

FIG. 4 is a diagram showing a blank according to a second embodiment.

FIG. 5 is a perspective view showing an assembled state of the above.

FIG. 6 is a longitudinal sectional front view of the above.

FIG. 7 is a view showing a blank according to a third embodiment;

FIG. 8 is a perspective view showing an assembled state of the above.

FIG. 9 is a longitudinal sectional front view of the above.

FIG. 10 is a longitudinal sectional side view of the above.

[Explanation of symbols]

 1 Bottom wall 2, 3 Rising wall 4 Passage piece R, S Ruled line

Claims (2)

[Claims] 1. A paper tray in which rising walls are continuously provided on each side of a peripheral edge of a bottom wall, and adjacent rising walls are connected to each other. A paper tray characterized by being curved in an arc shape. 2. The paper tray according to claim 1, wherein a corrugated cardboard having a thickness of 1.5 mm or less is used as a material, and a radius of curvature of the curved ruled line is 100 mm or more and 300 mm or less.