JPH0532259Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention is based on a sheet, in particular, a bag-shaped surface material is formed by joining together a plurality of surface material materials, and then a cushioning material such as foamed urethane is placed inside the bag-like surface material. This invention relates to an integrally foamed sheet that is foamed.

[Conventional technology]

Conventional integrally foamed sheets have connections obtained by deforming the ends 1b and 2b of adjacent surface material bodies 1 and 2 inward in a plurality of surface material bodies, as shown in FIGS. 6 to 10. Put pieces 1a and 2a together,
This combined part 3 is sewn with sewing thread 4 to form a bag-shaped surface material 5, and this surface material 5 is attached to the space 6 of the lower mold 6.
After setting the foaming solution P to the inside of the surface material 5,
is injected, the lid 7 is placed on the lid 7, and foaming is performed to obtain an integrally foamed molded sheet. Note that the surface material 5 is formed by applying wading Fb to the skin Fa.

In this case, a long piece 9 protrudes from the inner surface of the lower mold 6, and this long piece 9
It is set so as to be inserted from between b and 2b, and then the mating portion 3 is sandwiched from both sides by shape retaining members 8 made of U-shaped pieces. As a result, the mating portion 3 is held on the elongated piece 9 by the clamping force of the shape retaining material 8, and deformation does not occur during integral foam molding, and furthermore, after the sheet is completed, between the ends 1b and 2b is held by the clamping force. They are joined by force, and a deep pull is always applied at the seam Z, giving a rounded, bulging feel to the surface of the surface layer material. In other words, if the shape retaining material 8 were not present, the end portions 1b and 2b would gradually protrude outward and become deformed after long-term use.

The elongated piece 9 is fixed to the inner surface of the mold 6 and has a round bar 9a at its tip.

[Problem that the invention attempts to solve]

However, according to the above configuration, since the shape retaining material 8 has a configuration in which a rectangular resin board is bent into a U shape, the shape retaining material 8
When the joining part 3 of the C-shaped part Za is pinched, a straight part Ma, Ma occurs at the seam corresponding to the pinched part as shown in Fig. 11, which reduces the marketability. I was afraid.

[Means for solving problems]

In the present invention, the shape retaining member 80 is formed of a U-shaped piece 80a and overhanging pieces 80c extending from the tip side of the U-shaped piece 80a toward both sides.

[Effect]

Since the overhanging piece 80c bends along the C-shaped seam Za, no straight line portion Ma is generated at the seam Za.

〔Example〕

Figures 1a, b, c and 2 are views showing one embodiment of the sheet according to the present invention, and in each figure, the 6th
Components that are the same as those in the figures to FIG. 11 are designated by the same reference numerals.

In each figure, the shape retaining material 80 sandwiches the mating portion 3 from both sides, and has overhanging pieces 80c, 80c extending from the tips of the U-shaped pieces 80a, that is, the legs 80b, 80b, in the direction of both sides. ing.

According to the shape retaining member 80 having such a shape, the projecting pieces 80c, 80c are set so as to follow the sides of the mating portion 3 when the mating portion 3 is sandwiched from both sides as shown in FIG. , this overhang piece 8
0c and 80c are deformed along the side surface of the mating portion 3, making it difficult for the conventional straight line portion to occur. Moreover, as shown in FIG. 3, the shape retaining material 80 can be easily spread out with fingers W, making handling easier.

The overhanging piece 80c of the shape retaining material 80 is formed so that it becomes thinner toward the tip as shown in FIG. 4, or a notch T is provided at the tip as shown in FIG. It may be made easier.

[Effect of idea]

As explained above, according to the present invention, the shape retaining material,
Since it is made of a U-shaped piece and overhanging pieces that protrude from the tip of the U-shaped piece toward both sides, when the mating part is sandwiched, the overhanging piece deforms along the curve of the mating part, so the seam is smooth. There is no straight line part,
Productivity can be improved.

[Brief explanation of the drawing]

1a, b, c, 2 and 3 are views showing one embodiment of the seat according to the present invention, and FIGS. 4 and 5 are views showing other embodiments of the seat according to the present invention, FIGS. 6 to 11 are diagrams showing examples of conventional sheets. 1, 2... Surface layer material body, 3... Joining part, 4...
... Thread, 5 ... Surface material, 6 ... Lower mold, 7 ... Lid,
8, 80...Shape retaining material, 80a...U-shaped piece, 80
c... Overhang piece.

Claims (1)

[Claims for Utility Model Registration] Connecting pieces obtained by deforming the seam-side ends of adjacent surface material materials inward are brought together, and the joined parts are sewn to form a bag-shaped sheet surface material. death,
A sheet formed by retaining the shape of the mating part with a shape retaining material and foaming a cushioning material therein, wherein the shape retaining material is deformed into a U-shape and sandwiching the mating part from both sides; A sheet characterized in that it is formed of overhanging pieces extending in the direction of both sides from the tip side of the U-shaped piece.