JPS6214929Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to the structure of a cushion body for an automobile seat, and particularly to a cushion body structure that has excellent shape characteristics of the curved surface of the seat.

2. Description of the Related Art As shown in FIG. 1, the seat cushion body of an automobile is constructed of continuous curved surfaces in the left, right, front, and rear directions, particularly in order to appropriately maintain the posture of an occupant during driving. This type of cushion body for general automobiles often has a cushion core made of a soft synthetic resin foam such as polyurethane resin, which is covered with a cover material having a backing layer of synthetic resin foam.
Simply covering the surface of the cushion core with a cover material does not allow the cover material to follow a complex continuous curved surface with unevenness. Therefore, conventionally, as typified by the description in Japanese Utility Model Publication No. 51-411, a string is partially stretched from the back side of the cover material in the concave portion of the cushion core body, and the string is partially stretched vertically through the inside of the cushion core body. The shape of the concave-convex curved surface is maintained in a predetermined shape by using a so-called hanging structure in which the device is fixed to a mounting frame or the like on the back side.

However, in recent seat cushions of this type, the seat is often designed to have a continuous curved surface including a concave surface in order to further ensure a stable posture for the occupant, and the outer fabric is designed to follow such a concave surface. This is not easy to do with the above-mentioned hanging structure, and a gap is inevitably created between the cover material and the cushion core, which not only causes problems in appearance, but also in the seat design. In this case, the intended sitting posture holding performance and load distribution performance cannot be fully demonstrated, and functional problems such as seat collapse and durability occur.

Problems that the invention aims to solve In view of these points, this invention has an extremely simple structure that has excellent shape retention characteristics of the seat surface and improves the external finish quality. The present invention proposes a new seat cushion body that can sufficiently exhibit load dispersion performance and has improved cushioning properties and durability.

Means for Solving the Problems In other words, this invention is for a seat that has a flexible cushion top plate and a cushion core that retains its shape, and whose seat portion is formed into a continuous curved surface including a concave surface. It is a cushion body, and the flexible cushion top plate is composed of an outer fabric, a plate-shaped soft synthetic resin foam, and a reinforcing lining fabric, which are made of a polyurethane prepolymer coated on one or both surfaces of their laminated joint surfaces. The seat portion is integrally laminated and formed in advance into a predetermined curved shape by the reaction hardening action of the cushion, and the cushion top plate is attached to the upper surface of the cushion core formed in the predetermined curved shape. The present invention relates to a cushion body for an automobile seat, characterized by:

Embodiment The details of this invention will be explained below with reference to the attached drawings. FIG. 1 is an overall perspective view of a seat cushion body 10 representing an embodiment of this invention, and FIG. FIG. As shown in the figure, the seat cushion body 10 of this invention includes a flexible cushion top plate 20, which will be described in detail below.
The cushion core 30 has a shape-retaining property, and its seat portion 11 is formed into a continuous curved surface including a concave surface, and in many embodiments, it is formed according to desired design lines 12, 12... It has an embossed surface that is divided into sections. In Fig. 2, numeral 35 indicates side cloth;
Reference numeral 6 indicates a seat frame body, and reference numeral 37 indicates a hanging string.

FIG. 3 is a perspective view showing the flexible cushion top plate 20 together with its cross section. configured,
These are shaped in advance into the predetermined curved shape and raised shape of the seat portion 11. The cushion top plate 20 is formed by sequentially laminating the outer fabric 21, the plate-shaped soft synthetic resin foam 22, and the reinforcing lining fabric 23 in predetermined molds 41 and 42, for example, as shown in FIG. This is carried out by applying a polyurethane prepolymer to one or both surfaces of the bonding surface, for example, the soft synthetic resin foam 22, and hardening it by pressure contact while applying sufficient water and heat to cause a foaming reaction. Incidentally, when forming the cushion top plate 20, creases in the outer fabric 21 may appear on a specific curved surface. For example, in the example shown in FIG. 1, irregular folds may appear in the outer fabric 21 near the curved surface A rising from the bottom of the seat on both sides. These creases are greatly affected by the material of the outer fabric 21, especially its elasticity, or the curved surface shape of the portion, but in such a case, the specific curved surface is reserved as the uncoated portion of the polyurethane prepolymer. It is preferable to keep it. Therefore, in the areas where the polyurethane prepolymer is not applied, the outer fabric 21 is not bonded to the synthetic resin foam 22 and the lining fabric 23, and is left to their free expansion and contraction, resulting in unpleasant creases in the product appearance. I never manifest myself.

Describing the embodiments of each part constituting the cushion top plate 20, the outer fabric 21 is a flexible fabric, preferably a fabric with a high expansion/contraction ratio, such as a woven or knitted fabric, and the soft synthetic resin foam 22 Polyurethane resin foam, especially cut-outs from blocks (slabs) of polyurethane resin foam, are often used, and the reinforcing lining fabric 23
As the material, kanakin (gold purse), cheesecloth, non-woven fabric, etc. are used.

FIG. 5 is an exploded sectional view showing how the cushion top plate 20 is assembled to the seat cushion body. The cushion core body 30 is made of a soft polyurethane resin foam or the like, and is pre-molded to define almost the entire shape of the seat cushion body 10, and has shape retention properties as a seat. The cushion core 30 of the embodiment is obtained by molding by injecting polyurethane resin into a foam mold. It is a matter of course that this cushion core upper surface 30a is formed into a basic curved surface shape (including a concave surface) set in the seat design. However, it is not necessarily necessary to have decorative or fine irregularities such as those defined by the design lines 12 on the cushion top plate 20 described above.

The flexible cushion top plate 20 is placed on the upper surface 30a of the cushion core 30, and the side cloths 35, 3
5 is sewn together and fixed to the seat frame 36 or the like to form a seat cushion body. If necessary, the cushion top plate 20 may be fixed by hanging strings 37, 37 extending vertically from the cushion top plate 20 to the cushion core 30.

Functions/Effects As is clear from the drawings and explanations above, the seat cushion body according to the invented structure has a shape-retaining cushion core formed in advance in a predetermined curved shape. It is equipped with a flexible cushion top plate that is integrally laminated and formed into a predetermined curved shape of the part.
The adhesion between the two becomes extremely good. FIG. 6 is a cross-sectional view of a cover material 45 wrapped around a cushion core using a conventional suspension structure. Spaces B and C are inevitably created due to the poor quality of the seat, and the cover material is bulky, which not only improves the appearance but also lacks the ability to maintain posture as a seat. This invention eliminates these drawbacks and easily realizes a predetermined curved surface shape set in the seat design. In addition, the cushion top plate is formed by laminating the outer fabric, soft synthetic resin foam, and reinforcing lining fabric together by curing polyurethane prepolymer, so it maintains a certain curved shape and is flexible. It also has unique cushioning properties as a cover material. Therefore, some materials have excellent feel as a cover material and excellent initial feel as a cushion body. Furthermore, since the cushion top plate and the cushion core have good conformability, there is no tension or sag in any part of the seat components, which results in excellent load distribution when the vehicle is running, and the seat itself The effects of this idea, such as improved durability, are extremely large.

[Brief explanation of the drawing]

Fig. 1 is an overall perspective view of a seat cushion body showing an embodiment of this invention, Fig. 2 is a sectional view taken along line 2-2 in Fig. 1, and Fig. 3 shows a flexible cushion top plate along with its cross section. FIG. 4 is a sectional view showing the molded state of the cushion top plate; FIG. 5 is an exploded sectional view showing the assembled state of the seat cushion body;
The figure is a sectional view of a seat cushion body with a conventional suspension structure. DESCRIPTION OF SYMBOLS 10... Seat cushion body, 20... Cushion top plate, 21... Outer fabric, 22... Plate-shaped soft synthetic resin foam, 23... Reinforced lining fabric, 30... Cushion core, 35... Side fabric .

Claims (1)

[Claims for Utility Model Registration] 1. A seat cushion having a flexible cushion top plate 20 and a shape-retaining cushion core 30, and in which the seat portion 11 is formed into a continuous curved surface including a concave surface. The flexible cushion top plate 20 includes a outer fabric 21,
Plate-shaped soft synthetic resin foam 22 and reinforcing lining fabric 2
3, which have been integrally laminated and shaped in advance into the predetermined curved shape of the seat portion by the reaction hardening action of a polyurethane prepolymer applied to one or both surfaces of these laminated joint surfaces. A cushion body for an automobile seat, characterized in that a cushion top plate 20 is attached to the upper surface of the cushion core body 30 formed in a predetermined curved shape. 2. The cushion body for an automobile seat according to claim 1, which has an uncoated portion of polyurethane prepolymer on a specific curved surface of the flexible cushion top plate 20.