JPH0250861B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a case with a window by providing window holes and folding lines in case paper, polymerizing and bonding a transparent sheet to the window holes and the inner surface of the paper, and folding the paper along the ruled lines. It is.

This type of case with a window is as shown in the perspective view shown in FIG. 5, and the case body C has a window W, and the inner surface is covered with a transparent sheet S such as a plastic sheet.

In the conventional manufacturing method, the case paper 1 is
A folding line 2 is formed in the shape of a groove on the inner surface of the case (the surface that becomes the inside of the case, the same applies hereinafter), and a window hole (corresponding to the window W in FIG. 5) not shown in the same figure is provided, and the paper Sheet S that covers the same side and ruled line 2 and the window on the inside of 1
are polymerized and bonded, and then bent inward along ruled line 2 to form case body C.

In this case, there is an excess length of the sheet S on the inner surface of the folded paper 1, and a sagging portion F as shown in FIG. 4 is formed and protrudes. That is, although the lengths of the paper 1 and the sheet S which are overlapped in a planar state as shown in FIG. 3 are the same, in order to bend them as shown in FIG. 4, the outside must expand and the inside must contract. However, the paper does not stretch and cracks occur at the folded part, and the sheet does not shrink, so it protrudes into a hollow part F as shown in Figure 4.
This affects the folded portion of the window W of the sheet S, causing wrinkles, which is unsightly.

The present invention was made to solve the above-mentioned problems, and the case paper is provided with a window hole and a folding line is formed on the inner surface of the paper, and the ruled line over the window hole bends the paper outward. protrude to form a curved shape, and then polymerize and adhere a transparent sheet to the inner surface of the paper, covering the opening surfaces of the window hole and the curved ruled line;
The present invention relates to a method for manufacturing a case with a window, characterized in that the case is formed by folding a sheet of paper along each folding ruled line.

Hereinafter, an example of the embodiment of the present invention will be described with reference to the drawings. FIGS. 1 and 2 are cross-sectional views showing the state of the bent portion before and after bending. In the figure, 1 is a case paper, 2 is a folding line, 3 is a center line, and 4 is a pedestal having a recess 5 for forming the folding line 2.

First of all, the case paper 1 has a simple groove-shaped central ruled line 3.
A window hole (not shown) is formed in advance, and the paper is placed on the pedestal 4, and the central ruled line 3 and the peripheral parts on both sides are bent and protruded into the recessed part 5 to form a U-shaped cross section centered on the central ruled line 3. The curved ruled lines 2 are formed so as to protrude to the back side of the paper 1, that is, to the outer surface. Incidentally, such molding may be performed only on the ruled lines extending over the window holes, and other ruled lines that do not affect the appearance may be formed as ordinary ruled lines as shown in FIG. 3. Next, on the inner surface of the paper 1, a transparent sheet S made of plastic or the like is superimposed on necessary parts such as around the window holes, and is pressed and adhered with a pressing tool 6, thereby covering the inner surface of the paper and also attaching the above-mentioned U.
Cover the inner opening surface of the curved folding line 2 and the window hole (not shown), and then use the folding line 2 to cover the second
Form the case body C by folding it as shown in the figure.

When paper 1 and sheet S are folded together along the folding ruled line 2 as described above, since the folding ruled line 2 is U-shaped and compensates for the elongation of the folded portion, cracks may not occur on the folded portion surface B. and the space inside 21
Since there is enough room to absorb the shrinkage of the sheet S, the sheet S does not wrinkle or sag, so it does not adversely affect the window W, and as shown in Figure 2, the bent part B has a uniform shape both inside and outside the window. The folded portion of the sheet S in section W is beautifully finished and looks good.

Further, it is preferable to previously provide a central ruled line 3 having a narrower width at the center of the folding ruled line 2 as in this example, since the bent portion B can be finished at a more acute angle.

As described above, the present invention makes the folding ruled line of the case paper protrude outward, and by bending it, it compensates for the elongation on the outside of the folded part, prevents the paper from cracking, and uses the inner space to prevent the shrinkage of the lining sheet. Since it absorbs the material and prevents wrinkles and sagging, it is possible to easily manufacture a case with a window that has good-looking folds without unsightly folds, and the practical benefits are also great.

[Brief explanation of the drawing]

Figures 1 and 2 show an example of the present invention, and are cross-sectional views showing the bent portion before and after bending. Sectional view showing the state before and after bending the part, No. 5
The figure is a perspective view showing an example of a case with a window. 1 is a case paper, 2 is a ruled line for folding, 3 is a center ruled line, S is a transparent sheet, and W is a window.

Claims (1)

[Claims] 1 A window hole is provided in the case paper, and a ruled line for folding is formed on the inner surface of the paper, and at this time, the ruled line over the window hole is formed into a curved shape by bending and protruding the paper outward, and then the window hole and the curved line are formed. 1. A method for manufacturing a case with a window, characterized in that a transparent sheet is polymerized and adhered to the inner surface of a sheet of paper to cover the opening surface of the ruled lines, and the sheet is folded along each folding ruled line to form a case.