JPS626062B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a frame body such as a frame-shaped ceiling decoration body suitable for forming, for example, a lighting equipment mounting portion of a chandelier or the like.

Conventional ceiling decorations are made of foam due to its light weight and moldability, but even if appropriate woodgrain patterns are printed on the surface, the surface is rough and the original wood texture is lost. It cannot be used as a ceiling decoration. In particular, ceiling decorations are decorations that are installed on the attachment parts of chandeliers and the like, so beauty is an essential requirement, but only items that are insufficient to meet this requirement have been available.

Moreover, the manufacturing method requires complicated steps.

Therefore, the main purpose of the present invention is to provide a method for manufacturing a frame body that has a luxurious and beautiful appearance with a wood-like appearance, and that is lightweight and relatively easy to manufacture. It is something.

Hereinafter, the present invention will be explained in detail according to embodiments shown in the drawings.

FIG. 1 is a cross-sectional view of a ceiling decoration which is an example of a frame manufactured by a manufacturing method according to an embodiment of the present invention, and FIG. 2 is an enlarged cross-sectional view of the main parts thereof.

1 is a board made of a wood-based material such as plywood, particle board, hardboard, etc.; 2 is the board 1;
This is a facing sheet such as a vinyl chloride resin sheet attached to the surface of the

As shown in FIG. 3, in the substrate 1, a plurality of parallel bending grooves 3a and 3b having a V-shaped cross section that reach the facing sheet 2 but do not damage it are formed using a groove tool such as a cutter. , the facing sheet 2 can be bent freely at the bending grooves 3a and 3b.

Then, the facing sheet 2 is bent into grooves 3a, 3.
The facing sheet 2 is bent at point b, and the facing sheet 2 is bent and joined so that one bending groove 3a is closed, and the other bending groove 3b is conversely widened to form a bending plate 4, and a plurality of Both ends of each of the bent plates 4, which are abutting end faces, are finished into inclined end faces having a required angle.

Next, a plurality of such bent plates 4 are brought together at both ends to form a polygonal frame shape, and these bent plates 4 are placed in a mold 5 having a predetermined shape as shown in FIG. Load it inside and form it into a predetermined shape. That is, it is loaded so that the facing sheet 2 side is in contact with the inner surface of the male mold 5b. At this time, in order to prevent the foam 8 from spouting out from between the abutting parts of the bending plates 4,
It is preferable to cover the abutting portions by taping with a synthetic resin sheet, cellophane tape, adhesive paper, etc., so that the bending plates 4 are brought into close contact with each other.

Note that the inner surface of the male mold 5b has an uneven surface corresponding to the shape of the bending plate 4.

Then, a female mold 5 corresponding to the male mold 5b
a are joined at the parting surface to form a predetermined gap 6.

After this preparatory step, the foam 8 is injected into the syringe 7.
For example, in the case of urethane foam molding, chemicals that form urethane, such as polyisocyanate and polyol, which are the main materials of urethane, as well as blowing agents, catalysts, stabilizers, etc., are injected into a predetermined cavity 6. As shown in the figure, the foam may be foamed into a predetermined shape to form a foamed body 8 and then bonded to the substrate 1 of the bending plate 4. Note that the substrate 1 may be provided with an adhesive layer on the surface in contact with the foam 8 to further increase the adhesive strength. Further, depending on the material of the foam 8, a heating step or a cooling step may be added in which steam is caused to flow into the mold 5 to heat the mold 5 and the like.

In this way, when the foam 8 is foam-molded and fixed to the bending plate 4, the male mold 5b is separated from the female mold 5a, as shown in FIGS. 6 and 7.
The finished product is taken out from the female mold 5a.

The foam 8 may be fixed to the entire surface of the bending plate 4 on the substrate 1 side, as shown in FIG. 8, or around the abutting portion of the bending plate 4, as shown in FIG. For example, it may be fixed only to the four corners.

The present invention is not limited to the above embodiments, and can be modified in various ways.

For example, the overall shape of the frame may be a polygon other than a quadrangle, the shape of the bending plate may be changed depending on the position of the bending groove, or the foam and bending plate may be changed as shown in FIG. Dovetail grooves 9 may be formed on the substrate in order to increase the adhesive force with the substrate.

In addition, as shown in FIG. 11, the shape of the bent plate is also
A large number of bent grooves 3' having a U-shaped cross section or a U-shaped cross section are formed in parallel on the substrate 1' using a cutter or a circular saw, and the bent grooves 3' are closed to form an arc shape. good. Then, such a thin bending groove 3'
When the portions where the curved lines are arranged side by side are curved and loaded into the mold 5', the bent grooves 3' may be joined in places with hot melt adhesive to form a predetermined shape before that.

Since the present invention is configured as described above, the frame body can be manufactured relatively easily, the bending plate can be changed in various ways, and the foam body can also be deformed accordingly. Moreover, since the back surface of the bent plate of the manufactured frame is hardened with foam, it is reinforced and its strength is increased.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a ceiling decoration, which is an example of a frame manufactured by a manufacturing method according to an embodiment of the present invention. FIG. 2 is a sectional view of a main part of the ceiling decoration shown in FIG. 1. FIG. 3 is a sectional view of the bending plate in an unfolded state. 4 to 7 are cross-sectional views showing a manufacturing process according to an embodiment of the present invention. FIG. 8 is a rear perspective view of the ceiling decoration shown in FIG. 1. FIG. 9 is a rear perspective view of another example of the frame. FIG. 10 is a sectional view of the main part of yet another frame. FIG. 11 is a cross-sectional view of yet another bent plate of the frame. 1, 1'...Substrate, 2...Front sheet, 3a,
3b, 3'...Bending groove, 4...Bending plate, 5, 5'...
...Mold, 6...Empty, 7...Syringe, 8...Foam.

Claims (1)

[Scope of Claims] 1. A step of attaching a flexible and strong facing sheet to one surface of the substrate, and a plurality of bending grooves that reach the facing sheet from the other side of the substrate but do not damage it. A process of carving in parallel, a process of bending the facing sheet at each bending groove part to form a bent plate, and a process of joining a plurality of bent plates whose both ends are finished with inclined end faces at the required angle at both ends. , a step of fitting the foam into a mold, and a step of fixing the foam to the substrate by performing foam molding in the gap on the side surface of the substrate of the bent plate fitted into the mold to maintain a predetermined polygonal shape. include,
Method of manufacturing the frame. 2. The method for manufacturing a frame according to claim 1, wherein the substrate is plywood. 3. The method for manufacturing a frame according to claim 1 or 2, wherein the facing sheet is a vinyl chloride resin sheet. 4. The method for manufacturing a frame according to any one of claims 1 to 3, wherein the bending groove has a V-shaped cross section. 5. The method for manufacturing a frame according to any one of claims 1 to 4, wherein the foam is made of urethane.