JPH114982A - Seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase the rigidity of a seat pillow part without increasing the weight of a whole seat, by inserting for forming reinforcing cloth folded from the pad main body to the pillow part in the lateral direction to form. SOLUTION: A pad main body 2 and a pillow part 3 of a seat back pad 1 are integrally formed using polyurethane foam. The pillow part 3 is formed in a state upward protruded at the upper end part of the pad main body 2. Reinforcing cloth 5 is inserted between the pad main body 2 and the pillow part 3 inside the sheet back pad 1 for forming. The reinforcing cloth 5 is made of coarse blanket, formed by folding the whole in the lateral direction like bellows, and a plurality of beads are formed along the longitudinal direction to increase the rigidity. The upper part 5a of the reinforcing cloth 5 is forward inclined as well as the pillow part 3. Thus the rigidity of the pillow part 3 to receive the head part of a crew is increased to securely receive.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat structure, and more particularly to a pad structure for a seat back of an automobile seat.

[0002]

2. Description of the Related Art For example, a pillow portion for stabilizing the head of an occupant is formed at an upper end portion of a seat back of an automobile so as to protrude upward from a pad body constituting the seat back. It is said to be a high back seat. The seat back of this seat has a structure in which a seat back pad formed of a foam material is supported by a frame and covered by a cloth trim cover. Therefore, the pillow portion is formed integrally with the upper end portion of the seat back pad at the same time as the molding of the seat back pad, and a portion covering the pillow portion is also formed on the trim cover according to the shape of the pillow portion. A similar technique is disclosed in Japanese Patent Application Laid-Open No. 5-76436.
Or Japanese Utility Model Application Laid-Open No. 2-76937.

[0003]

However, in such a conventional technique, the pillow portion is integrally formed of a foamed material, so that the shape is stable and an impact or the like is applied to the head of the occupant. In such a case, a headrest frame is protruded from the upper portion of the frame inside the pillow portion so as to have a strength that can withstand the impact, thereby increasing the weight of the entire seat by the amount of the headrest frame. .

The present invention has been made in view of such prior art, and provides a seat back pad capable of increasing the rigidity of a pillow portion without increasing the weight of the entire seat. is there.

[0005]

According to the first aspect of the present invention,
In a seat comprising a seat back having a seat back pad having a pillow portion projecting further upward at the upper end portion of the pad body and entirely formed of a foam material, and a seat cushion, from the pad body to the pillow portion And a reinforcing cloth folded in a bellows shape in the lateral direction is insert-molded.

According to the first aspect of the present invention, since the reinforcing cloth is folded in a bellows shape in the horizontal direction, the rigidity in the vertical direction is high. Therefore, the rigidity of the pillow portion can be maintained by insert-molding the reinforcing cloth having the increased rigidity in the vertical direction from the pad body of the seat back to the pillow portion. Since only a lightweight reinforcing cloth is used, the weight of the entire seat can be reduced. Also, by folding the bellows, the contact area between the reinforcing cloth and the foam material increases,
Since the integration between the reinforcing cloth and the foam material is increased, the reinforcing cloth and the foam material are not separated even after long-term use.

The invention according to claim 2 is characterized in that the reinforcing cloth is made of a coarse blanket which can be impregnated with a foam material.

According to the second aspect of the present invention, since the reinforcing cloth is made of a coarse blanket which can be impregnated with a foam material, the integrity of the reinforcing cloth and the foam material is further improved.

According to a third aspect of the present invention, the pillow portion is inclined forward with respect to the pad body, and the upper portion of the reinforcing cloth inserted in the pillow portion is inclined forward with the pillow portion. Features.

According to the third aspect of the present invention, even if the pillow portion is inclined forward with respect to the pad body, it can be dealt with by similarly inclining the upper portion of the reinforcing cloth forward. Because of the reinforcing cloth, it is easy to bend the upper part, and it is easy to cope with the inclination of the pillow part.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below with reference to FIGS. FIG.
1 shows a right half of a seat back pad 1 constituting a seat of an automobile. The seat back pad 1 is used by being covered with a trim cover, but the trim cover is not shown in FIG.

The seat back pad 1 is formed by integrally molding a pad body 2 and a pillow portion 3 with a polyurethane foam as a foam material. The pillow portion 3 is formed at the upper end of the pad body 2 so as to protrude further upward. The pillow portion 3 is slightly inclined forward with respect to the pad main body 2 in order to easily stabilize the occupant's head. A pull groove 4 for fixing a trim cover (not shown) is formed on the surface of the pad body 2.

A reinforcing cloth 5 is insert-molded inside the seat back pad 1 from the pad body 2 to the pillow portion 3. The reinforcing cloth 5 has a coarse blanket property, and is entirely folded in a bellows shape in the horizontal direction. Therefore, the reinforcing cloth 5 has a state in which a plurality of beads along the vertical direction are formed, and the rigidity in the vertical direction is increased. The upper portion 5a of the reinforcing cloth 5 is inclined forward as in the case of the pillow portion 3.

Next, a method of manufacturing the seat back pad 1 will be described with reference to FIG. The reinforcing cloth 5 is set in a molding chamber 8 formed by an upper mold 6 and a lower mold 7. On a portion corresponding to the pillow portion 3 of the lower die 7, a pin 9 for holding the bent state of the upper portion 5a of the reinforcing cloth 5 is formed. Since the reinforcing cloth 5 can be folded and has a coarse blanket property, the upper part 5a can be easily bent, and the pin 9 can surely hold the bent state. And the reinforcing cloth 5
Is injected into the molding chamber 8 in which is set, the foam is injected and foamed, the pad body 2 and the pillow portion 3 are simultaneously molded, and the reinforcing cloth 5 is insert-molded inside.

In the seat back pad 1 manufactured as described above, since the reinforcing cloth 5 having high rigidity in the longitudinal direction is insert-molded into the polyurethane foam from the pad body 2 to the pillow portion 3, the pillow portion 3 and the pillow portion The rigidity of the pad body 2 in the vicinity of 3 is improved. In particular, since the reinforcing cloth 5 is impregnated with the polyurethane foam and folded in a bellows shape, the contact area with the polyurethane foam increases, so that the integrality between the reinforcing cloth 5 and the polyurethane foam increases, and the rigidity of the pillow portion 3 increases. Even better. Therefore, the work of putting a trim cover (not shown) on the pillow portion 3 is facilitated.

The pillow portion 3 and the upper portion 5a of the reinforcing cloth 5
Are inclined to the front side, the front surface of the reinforcing cloth 5 is responsible for the pressure from the occupant's head, but the front surface of the reinforcing cloth 5 has a bellows. Since a plurality of beads formed in the vertical direction are formed in the vertical direction, it is possible to reliably receive the pressure from the occupant's head.

In addition, since the contact area between the reinforcing cloth 5 and the polyurethane foam is increased as described above and the polyurethane foam is impregnated, even if the reinforcing cloth 5 and the polyurethane foam are used for a long period of time, the separation between the reinforcing cloth 5 and the polyurethane foam may not occur. Absent. Furthermore,
Since only the lightweight reinforcing cloth 5 is inserted into the polyurethane foam, the weight of the entire seat can be reduced.

[0018]

According to the first aspect of the present invention, since the reinforcing cloth is folded in a bellows shape in the horizontal direction, the rigidity in the vertical direction is high. Therefore, the rigidity of the pillow portion can be maintained by insert-molding the reinforcing cloth having the increased rigidity in the vertical direction from the pad body of the seat back to the pillow portion. Since only a lightweight reinforcing cloth is used, the weight of the entire seat can be reduced. In addition, since the contact area between the reinforcing cloth and the foam material is increased by folding in a bellows shape, and the integrality between the reinforcing cloth and the foam material is increased, the reinforcing cloth and the foam material are separated even after long-term use. I will not do it.

According to the second aspect of the present invention, since the reinforcing cloth is made of a coarse blanket which can be impregnated with a foam material, the integrity of the reinforcing cloth and the foam material is further improved.

According to the third aspect of the present invention, even if the pillow portion is inclined forward with respect to the pad body, it can be dealt with by similarly inclining the upper portion of the reinforcing cloth forward. Because of the reinforcing cloth, it is easy to bend the upper part, and it is easy to cope with the inclination of the pillow part.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a seat back pad according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along the line SA-SA shown in FIG.

FIG. 3 is a sectional view showing a mold for manufacturing the seat back pad.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Seat back pad 2 Pad body 3 Pillow part 5 Reinforcement cloth 5a Upper part

Claims (3)

[Claims] 1. A seat comprising: a seat back having a seat back pad having a pillow portion projecting further upward at an upper end portion of a pad body and integrally formed of a foam material; A seat, wherein a reinforcing cloth folded in a bellows shape in a lateral direction is insert-molded from a main body to a pillow portion. 2. The seat according to claim 1, wherein the reinforcing cloth is made of a coarse blanket that can be impregnated with a foam material. 3. The seat according to claim 1, wherein the pillow portion is inclined forward with respect to the pad body, and an upper portion of the reinforcing cloth inserted in the pillow portion is provided with a pillow. A seat that is tilted forward according to the part.