JPS5816825Y2 - Bent structure in hard synthetic resin thin plate - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to the structure of a bent portion in a thin plate made of hard synthetic resin.

Thin plates made of hard synthetic resin are widely used as simple packaging packs for confectionery, eggs, etc. after being molded into a desired shape using forming means such as vacuum forming. There are many configurations in which the bent part is assembled by folding it, and in such cases, the bent part will form a clear corner in the bent state because the peripheries on both sides of the bent part will bulge outward due to the restoring force of the material. I couldn't do it, and it looked bad.

The present invention has been devised in view of the above-mentioned points, and is intended to provide a structure of a bent portion that can form a clearly defined corner.

To explain an embodiment illustrating the present invention, in FIG. 1, a hard synthetic resin thin plate 1 has a bent portion 4 set between surfaces 2 and 3 so as to be continuous in the unfolded state. Bending part 4
Both side portions of the bending portion 5 each have a circular arc-shaped cross section extending toward the bending side, and the bent portion 4 is formed into a square cross-section.

The bent portion 5 formed into the above-mentioned arc shape may be formed into a rectangular bent portion 6 as shown in FIG.

The bending portion 4 having a rectangular cross section is set at a required angle for bending or an angle slightly smaller than the required angle.

In the above structure, when the necks 2 and 3 are bent at a required angle, for example, at a right angle, at the bending portion 4, the bending portions 5 and 6 are bent due to the restoring force of the material, as shown in FIGS. 2 and 4. As a result, it is deformed and maintained in a form that is nearly coplanar with each of surfaces 2 and 3.

Therefore, the bent portion 4 bent at the required angle becomes a ridge line that does not protrude outward on both sides, and a clear corner at the required angle can be formed.

As explained above, the present invention has a simple structure in which bending parts 5 and 6 are formed on both sides of the bending part 4, respectively, and projecting toward the bending side, and the bending part 4 is formed into a rectangular cross section. Therefore, when folded and assembled, it is possible to form a corner with a clear required angle, and this has the effect of making it possible to finish the external shape in the folded state with a good appearance.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is an enlarged vertical sectional view of the main part, FIG. 2 is a vertical sectional view of the bent state, and FIG. 3 is an enlarged longitudinal sectional view of the main part showing another embodiment. The top view and FIG. 4 are longitudinal cross-sectional views of the folded state. 4...Bending portion, 5,6...Bending portion.

Claims (1)

[Scope of utility model registration request] 1. A hard synthetic resin thin plate characterized in that bending parts 5 and 6 are formed on both sides of the bending part 4 to be set, respectively, and the bending parts 4 are formed to have a rectangular cross section. Bent structure. 2. A bent portion structure in a thin sheet made of hard synthetic resin according to claim 1, wherein the bent portion 5 has an arcuate cross section. 3. The bent portion structure in a thin sheet made of hard synthetic resin according to claim 1, wherein the bent portion 6 has an angular cross section.