JP2007020636A - Seat pad and cushioning material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seat pad and cushioning material provided with grooves having openings of a small width, and having a sufficient adhesion strength of skin material and a good appearance. <P>SOLUTION: The groove 20 is provided between a part for buttocks and a side part of the seat pad 1A. The groove 20 has a trapezoid shape having the opening of an approximately equal width and an inner part formed wider toward the bottom so that the width W<SB>1</SB>of the opening is smaller than the width W<SB>2</SB>of the maximum width on the bottom. A fastener 21 is provided on the bottom of the groove 20 so as to extend the entire width, and a fastener 31 is provided on the skin material 30 so as to be engaged with the fastener 21. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a seat pad and a cushion material in a vehicle seat or the like formed by attaching a skin material to the outer surface of the seat pad.

  Cushion materials obtained by assembling a skin material such as cloth with urethane foam are used for seats of various vehicles, door interiors, and the like (for example, Japanese Patent Application Laid-Open No. 2003-290574). The urethane foam and the skin material may be detachably assembled by a fastener such as a hook-and-loop fastener fixed to the urethane. In particular, when the hanging design is provided on the sheet, as shown in FIG. 2, the hanging design is positioned in a groove portion that is recessed from the outer surface of the molded product. 2A is a perspective view of the sheet 1, and FIG. 2B is a cross-sectional view taken along the line BB of FIG.

  The seat 1 includes a seat cushion 2, a seat back 3, and a headrest 4, and a hanging design 5 made of a groove is provided on the upper surface of the seat cushion 2 and the front surface of the seat back 3. This sheet 1 is obtained by covering a urethane foam 6 with a skin material 7. A fastener 8 is provided on the urethane foam 6 on the bottom surface of the groove of the hanging design 5. Fasteners 9 provided on the skin material 7 are coupled to the fasteners 8. The fastener 8 is integrally formed with the urethane foam 6. The fasteners 8 and 9 each include a belt-like base and an engaging protrusion (hook or loop) provided on one surface (fastening surface) of the base. The fasteners 8 and 9 are connected to each other by engaging the hook and the loop.

  In order to dispose the fastener on the surface of the urethane foam, integral molding of urethane and fastener has been conventionally performed. In this case, for example, the liquid foam raw material is poured into the mold after the fastening surface is covered with a rail having a concave cross section so that the liquid foam raw material does not enter and adhere to the fastening surface of the fastener. I have to.

  3 and 4 illustrate this conventional method, FIG. 3 is a sectional view of the mold after foaming, and FIG. 4 is a perspective view showing the engagement relationship between the fastener 8 and the rail 12. In this method, a molding die comprising a lower mold 10 and an upper mold 11 is used, and the fastener 8 is attached to a urethane foam 6 that is a foam molded product by integral molding.

  A rail 12 is fixed to the lower mold 10 of the molding die, and a fastener 8 is held on the rail 12. The rail 12 has an upward U-shaped cross-sectional shape. Naturally, as shown in FIG. 7, the engaging protrusion 8b is directed downward, is disposed in the rail 12, and the anchor 8c is directed upward. 8a indicates a base.

After foaming the urethane, the molded product is demolded upward in FIGS.
JP 2003-290574 A

  A smaller groove in the seat pad 6 for constituting the hanging design 5 is preferable because the appearance of the cushioning material after the skin material is pasted is improved. However, if the groove width is reduced, the widths of the fasteners 8 and 9 are also reduced. The strength of the skin material 7 in the pulling direction is reduced.

  An object of the present invention is to provide a seat pad and a cushioning material that can reduce the width of the entrance portion of the groove, have good appearance, and can sufficiently increase the tension strength of the skin material.

  The seat pad according to claim 1 is characterized in that, in the seat pad having a groove on the outer surface to which the skin material is attached, the width of the inlet portion of the groove is smaller than the depth side.

  The seat pad of claim 2 is characterized in that, in claim 1, the seat pad is made of a synthetic foam resin.

  The seat pad of claim 3 is characterized in that, in claim 2, the synthetic resin is polyurethane.

  According to a fourth aspect of the present invention, the seat pad according to any one of the first to third aspects is characterized in that the seat pad is a seat cushion or a seat back seat pad.

  According to a fifth aspect of the present invention, the seat pad according to any one of the first to fourth aspects is characterized in that the width of the inlet portion of the groove is 5 to 20 mm.

  A seat pad according to a sixth aspect is characterized in that, in any one of the first to fifth aspects, a fastener is provided on a bottom surface of the groove.

  The seat pad of claim 7 is characterized in that, in claim 6, the width of the fastener is 20 mm or less larger than the width of the inlet portion of the groove.

  The cushion material according to claim 8 is a cushion material in which a skin material is bonded to an outer surface of the seat pad with an adhesive, and the seat pad is the seat pad according to any one of claims 1 to 7. To do.

  The cushion material according to claim 9 is the cushion material according to claim 8, wherein the seat pad is according to claim 6 or 7, wherein the skin material is coupled to the bottom surface of the groove through the fastener. Is.

  In the seat pad of the present invention and the cushion material using the same, the entrance of the groove is smaller than the back side, so the appearance of the cushion material is good. Further, since the bottom surface of the groove is wide, a fastener having a large width can be used, and the covering material has a high tension strength.

  Hereinafter, embodiments will be described with reference to the drawings.

  FIG. 1A is a cross-sectional view of a groove portion of a seat pad according to the embodiment, and FIG. 1B is a cross-sectional view of a groove portion of a cushion material to which a skin material is attached.

The seat pad 1A is made of polyurethane foam which is foam-molded using the entire mold, like the seat pad 1 of FIG. 2, and a groove 20 is provided between the bottom part of the butt and the side part. The groove 20 has a trapezoidal shape having a substantially uniform width on the inlet side and a large bottom surface on the back side. In this groove 20, the width W _{1 of the} entrance portion is small, and the width W ₂ of the bottom surface, which is the maximum width on the back side, is larger than the entrance portion width W ₁ . The width W _{1 of the} inlet portion is preferably about 5 to 20 mm, and the width W ₂ of the bottom surface is preferably 20 mm or less, particularly about 2 to 20 mm larger than the width W ₁ of the inlet portion 21.

  A fastener 21 is provided on the bottom surface of the groove 20. In this embodiment, the width of the fastener 21 is equal to the width of the bottom surface of the groove 20, but it may be slightly smaller. The skin material 30 is attached to the surface of the seat pad 1A using an adhesive such as an aqueous emulsion type. The skin material 30 is provided with a fastener 31, and the fastener 31 is engaged with the fastener 21 on the bottom surface of the groove.

Thus, by narrowing the entrance of the groove 20 of the seat pad 1A, the appearance of the cushion material is improved. Further, a large width _{W 2} of the inner side of the groove 20, the width of the fastener 21 and 31 is large, high bond strength between the fastener 21 and 31, pinning strength of the skin material 30 is also high.

  The above embodiment is an example of the present invention, and the present invention may take forms other than those shown in the drawings. For example, the cross-sectional shape of the groove may be other than illustrated. For example, the groove may have a trapezoidal cross-sectional shape as a whole, and the back side may have a square cross-sectional shape.

  The present invention can be applied to both a seat portion and a backrest portion of a vehicle seat.

It is sectional drawing which shows embodiment. It is sectional drawing which shows a prior art example. It is sectional drawing which shows the shaping | molding method of a seat pad. It is a perspective view which shows the shaping | molding method of a seat pad.

Explanation of symbols

1,1A Seat pad 8, 9, 21, 31 Fastener 20 Groove 30 Skin material

Claims (9)

  The seat pad which has a groove | channel on the outer surface where a skin material is adhered, The width | variety of the entrance part of this groove | channel is smaller than a back | inner side, The seat pad characterized by the above-mentioned.   2. The seat pad according to claim 1, wherein the seat pad is made of a foamed synthetic resin.   The seat pad according to claim 2, wherein the synthetic resin is polyurethane.   4. The seat pad according to claim 1, wherein the seat pad is a seat cushion or a seat back seat pad.   The seat pad according to any one of claims 1 to 4, wherein the width of the inlet portion of the groove is 5 to 20 mm.   The seat pad according to any one of claims 1 to 5, wherein a fastener is provided on a bottom surface of the groove.   The seat pad according to claim 6, wherein the width of the fastener is 20 mm or less larger than the width of the inlet portion of the groove.   The cushion material which bonded the skin material to the outer surface of the seat pad with an adhesive, wherein the seat pad is the seat pad according to any one of claims 1 to 7.   9. The cushion material according to claim 8, wherein the seat pad is the one according to claim 6 or 7, wherein the skin material is coupled to the groove bottom surface through the fastener.

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