JP2010018196A - Seatback pad and vehicle seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seatback pad having excellent shock-absorbing property when being hit by an occupant seated in a rear seat, and a seatback having the seatback pad. <P>SOLUTION: The seatback pad 1 comprises a seatback pad body 2, a shock-absorbing material 3 provided on a back side of the seatback pad body 2, and a supporter material 5 to cover the shock-absorbing material 3. An expansion part 6 is expanded from an upper portion of the seatback pad 10, and the shock-absorbing material 3 is arranged on the front side of the expansion part 6. The shock-absorbing material 3 and the supporter material 5 are integrated with the seatback pad body 2. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a seat back pad suitable as a vehicle seat back pad, and more particularly to a seat back pad provided with an impact absorbing material. Moreover, this invention relates to the vehicle seat provided with this seat back pad.

A vehicle seat back pad used for an automobile or the like is usually made of polyurethane foam. However, in JP-A-5-57069, the back surface of a side support portion of a main body portion made of polyurethane foam is lighter than polyurethane foam. A material in which a molded body of expanded polystyrene is fitted is described. Japanese Patent Application Laid-Open No. 2000-108749 describes a vehicle seat for side collision in which an impact absorbing material made of hard foamed urethane, foamed polystyrene or the like is disposed in a side support.
JP-A-5-57069 JP 2000-108749 A

  The shock absorber of the seat back pad disclosed in Japanese Patent Application Laid-Open No. 2000-108749 is for dealing with a side collision, and the impact when the head of the occupant of the rear seat hits the upper rear side of the seat back pad during the front collision. It does not have a function to absorb water.

  In a seat back pad in which foamed polystyrene is fitted on the back surface as disclosed in JP-A-5-57069, abnormal noise is generated when the foamed foam slides on the seat frame. Note that foamed polystyrene and foamed polyethylene are more likely to generate abnormal noise due to sliding than polyurethane foam.

  An object of the present invention is to provide a seat back pad excellent in shock absorption when a rear seat occupant hits, and a vehicle seat provided with the seat back pad.

  The seat back pad of the present invention (invention 1) is provided with a seat back pad main body made of a foam material and an impact absorbing material disposed on at least the rear surface side of the seat back pad main body.

  According to a second aspect of the present invention, the seat back pad according to the first aspect is characterized in that the shock absorbing material is integrally foamed with the seat back pad main body.

  A seat back pad according to a third aspect of the present invention is the seat back pad according to the first or second aspect, wherein the impact absorbing material is formed of a foam molded article.

  According to a fourth aspect of the present invention, there is provided a seat back pad according to the third aspect, further comprising a supporter material that covers the shock absorbing material.

  According to a fifth aspect of the present invention, the seat back pad according to the third or fourth aspect is characterized in that the impact absorbing material is made of expanded polystyrene.

The seat back pad according to claim 6 is the seat back pad according to claim 4 or 5, wherein the support material is made of at least one nonwoven fabric of polypropylene, polyethylene, polyethylene terephthalate, acrylic, wool, rayon and polyester having a basis weight of 10 to 300 g / m ^2. It is characterized by.

  According to a seventh aspect of the present invention, in the seat back pad according to any one of the first to sixth aspects, an upper rear surface side of the seat back pad is an overhanging portion projecting to a rear center side of the seat back pad. It is characterized in that at least a part of the protruding portion is made of the shock absorbing material.

  The seat back pad according to claim 8 is the seat back pad according to claim 7, wherein the shock absorbing material is disposed on a front side of the overhanging portion, and a rear side of the overhanging portion is formed of a foam material of the seat back pad main body. It is characterized by this.

  The seat back pad according to claim 9 is the seat back pad according to claim 7 or 8, wherein the seat back pad includes a headrest hole, and the headrest hole penetrates the impact absorbing material. .

  A vehicle seat according to the present invention (Claim 10) includes the seat back pad according to any one of Claims 1 to 9, and a frame to which the seat back pad is attached.

  The vehicle seat of claim 11 is characterized in that, in claim 10, the shock absorbing material is disposed so as to be supported by the frame.

  In the seat back pad of the present invention (Claim 1), since the shock absorbing material is disposed at least on the rear side of the upper portion of the seat back pad, the seat back pad is excellent in shock absorption when the rear seat occupant hits. .

  In the seat back pad according to claim 2, since the shock absorbing material is integrally foamed, the seat back pad main body and the shock absorbing material are excellent in unity.

  In the seat back pad according to the third aspect, since the shock absorbing material is made of a foamed molded product, the tactile sensation is good.

  In the seat back pad according to the fourth aspect, since the impact absorbing material is covered with the support material, even if the impact absorbing material is cracked or chipped, it is possible to prevent the fragments from scattering. Further, since the supporter material covers the shock absorbing material, it is possible to prevent the generation of noise due to the sliding between the shock absorbing material and the seat frame.

  As claimed in claim 5, as the impact absorbing material, lightweight polystyrene having high hardness is suitable.

As claimed in claim 6, as the support material, a nonwoven fabric made of at least one of polypropylene, polyethylene, polyethylene terephthalate, acrylic, wool, rayon and polyester having a basis weight of 10 to 300 g / m ² is particularly effective in preventing abnormal noise generation. Is preferred.

  As described in claim 7, by disposing the shock absorber in the overhanging portion, it is possible to absorb the impact of the rear seat occupant hitting the overhanging portion.

  As described in claim 8, when the impact absorbing material is disposed on the front side of the overhanging portion and the rear side of the overhanging portion is made of a foam material, the feel of the overhanging portion becomes good. In addition, it is possible to prevent the shock absorbing material made of the foam molded body from being deformed by being pushed by the occupant's finger, hand, or personal belongings when there is no collision.

  When the headrest hole is configured to penetrate the shock absorber as in claim 9, the shock absorber is inserted into the inner surface of the mold by inserting a pin for forming the headrest hole into the shock absorber during foam molding. Can be held. This also prevents displacement of the shock absorbing material and supporter material.

  The vehicle seat of the present invention (invention 10) includes the above-described seat back pad and has the above-described effects.

  In the vehicle seat according to the eleventh aspect, since the frame supports the shock absorber, the amount of deformation of the shock absorber when the rear seat occupant hits the shock absorber is large, and the amount of shock absorption is large.

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

  1 is a front view of a seat back pad according to an embodiment, FIG. 2 is a cross-sectional view taken along the line II-II of FIG. 1, and FIG. 3 is an enlarged view of the upper part of FIG.

  The seat back pad 1 includes a seat back pad main body 2 made of polyurethane foam, and an impact absorbing material 3 made of a foam molded body disposed on the upper rear side of the seat back pad 1.

  On the back surface of the seat back pad 1, the left and right side edges and the upper edge are overhangs 6 that protrude toward the center of the back surface. A bag-like cavity 4 that opens toward the center of the back surface is formed at the edge. The shock absorbing material 3 is disposed on the front side of the overhanging portion 6 facing the cavity 4 in the overhanging portion 6 on the upper portion of the seat back pad 1. In addition, this front surface is a surface which faces the vehicle front among the outer surfaces of the overhanging portion 6.

  The surface of the shock absorber 3 facing the cavity 4 is covered with a supporter material 5 (FIG. 3). The supporter material 5 also covers the front surface of the overhanging portion 6 adjacent to the shock absorbing material 3.

The seat back pad body 2 is made of polyurethane foam. The shock absorbing material 3 is made of foamed polystyrene, hard foamed urethane, foamed polyethylene, or the like. In this embodiment, foamed polystyrene (foamed polystyrene) is used. The supporter material 5 is preferably a nonwoven fabric made of at least one of polypropylene, polyethylene, polyethylene terephthalate, acrylic, wool, rayon and polyester having a basis weight of 10 to 300 g / m ² . The thickness of the supporter material 5 is preferably about 0.2 to 1.0 mm, particularly about 0.4 to 0.6 mm.

  In this embodiment, the shock absorber 3 is plate-shaped and extends in the left-right direction of the vehicle body over a range of 20 to 90%, particularly 40 to 60% of the full width in the left-right direction of the upper portion of the seat back pad 1.

  The rear side of the overhang portion 6 is made of a foam material that constitutes the seat back pad main body 2.

  This seat back pad 1 is manufactured by holding the supporter material 5 and the shock absorbing material 3 on the inner surface of the mold and foam-molding the seat back pad main body 2.

  After the skin material (not shown) is attached to the seat back pad 1 configured in this manner, the seat back is configured by assembling the seat back frame (not shown). The upper part of the seat back frame is inserted into the cavity 4 above the seat back pad 1. The shock absorbing material 3 comes into contact with the seat back frame via the supporter material 5.

  The vehicle seat of the present invention includes such a seat back.

  The seat back pad 1 and the vehicle seat including the seat back pad 1 according to this embodiment include an impact absorbing material 3 on the rear side of the upper portion of the seat back pad 1, and a rear seat occupant during a frontal collision of the vehicle. Has a large amount of shock absorption when it hits the upper part of the seat back pad 1.

  In this vehicle seat, since the shock absorber 3 is supported by the seat back frame via the supporter 5, the shock absorption when the rear seat occupant hits the upper portion of the seat back pad 1 at the time of a front collision. The deformation amount of the material 3 is large, and the shock absorbing characteristics are excellent.

  In this embodiment, since the shock absorber 3 is integrated with the seat back pad main body 2 by integral foaming, the integrity of the seat back pad main body 2 and the shock absorber 3 is high.

  In this embodiment, the impact absorbing material 3 is disposed on the front side of the overhanging portion 6, and the rear side of the overhanging portion 6 is constituted by the foam material (main body foaming material) of the seat back pad main body 2. The main body foam material covers the rear side of the shock absorber 3. Therefore, tactile sensation when the occupant contacts the rear side of the overhanging portion 6 is good. Further, since the shock absorbing material 3 made of the foam molded body is covered with the main body foamed material, the shock absorbing material is not directly pressed by an object such as an occupant's finger, hand or personal belongings when there is no collision. Therefore, even the shock absorbing material 3 made of expanded polystyrene that easily undergoes plastic deformation is prevented from plastic deformation.

  In the seat back pad 1, the front surface of the impact absorbing material 3 is covered with the support material 5, so that generation of abnormal noise due to sliding between the impact absorbing material 3 and the seat frame or the like is prevented. Further, the shock absorbing material 3 is formed in advance, and the resin is not impregnated from the shock absorbing material 3 to the support material 5 at the time of foam molding of the seat back pad 1, and the sliding between the support material 5 and the seat frame or the like. Generation of abnormal noise due to movement is also prevented.

  In this embodiment, since the shock absorber 3 is made of foamed polystyrene that is lighter than polyurethane foam, the weight of the seat back pad 1 can be reduced.

[Another embodiment]
In the seat back pad 1 of the above embodiment, the shock absorber 3 is provided only on the upper portion of the seat back pad 1, but only the upper portion like the shock absorber 3A of the seat back pad 1A in FIGS. Alternatively, it may be provided so as to extend to the left and right side support portions.

  4 is a front view of the seat back pad 1A, and FIG. 5 is a cross-sectional view taken along line VV of FIG.

  The shock absorbing material 3A shown in FIGS. 4 and 5 extends from the front surface side of the overhanging portion 6 to the upper portion of the cavity portion 4. However, the shock absorbing material 3A does not reach the rear surface of the overhang portion 6 or the upper end surface of the seat back pad 1A.

  Since the shock absorbing material 3A has a substantially J-shaped cross section so as to go around the cavity 4, it can be easily held by the core of the seat back pad molding die.

  An example of this seat back pad molding die will be described with reference to FIG.

  The mold 10 includes an upper mold 11, a lower mold 12, and a core 13. The core 13 is attached to the upper mold 11. The peripheral edge portion of the core 13 protrudes so as to form the cavity portion 4 in the cavity portion 14, and the shock absorbing material 3 </ b> A is held by the core 13 so as to strongly hold the protruding portion. .

  In order to perform foam molding of the seat back pad 10, first, the supporter material 5 is disposed along the core 13 and temporarily fixed with a double-sided tape or the like.

  Next, the shock absorber 3 </ b> A is attached to the core 13. At this time, the shock absorbing material 3 </ b> A sandwiches the peripheral portion of the core 13 by its own elastic force and is held by the core 13.

  Thereafter, a urethane stock solution is supplied into the lower mold 12, the mold is closed, and the urethane is heated and foamed. After foaming, cure, open mold, and demold. The shock absorbing material 3 </ b> A and the supporter material 5 are integrated with the seat back pad main body 2 made of a foam molded product, and are smoothly released from the core 13.

  In the molding method of FIG. 6, the shock absorbing material 3A can be easily held by causing strong interference with the core 13, so that the molding operation is easy.

  In the present invention, almost the entire overhanging portion 6 may be constituted by the shock absorbing material 3B as in the seat back pad 1B of FIG. The shock absorber 3B has a substantially U-shaped cross-sectional shape that extends from the upper side to the front side of the cavity 4. The shock absorbing material 3B does not reach the upper end surface and the front surface of the seat back pad 1B, and the upper end surface and the front surface of the seat back pad 1B are made of a foam material constituting the seat back pad main body 2.

  The shock absorbing material 3B may be provided only on the upper part of the seat back pad 1B like the shock absorbing material 3 in FIGS. 1 to 3, and like the shock absorbing material 3A in FIGS. Furthermore, you may extend to the side support part.

  In this invention, you may provide the headrest hole for installing a headrest above the upper end surface of a seat back pad. By forming the headrest hole so as to penetrate the shock absorbing material, the shock absorbing material can be held on the inner surface of the mold by using the headrest hole forming pin of the mold. Next, the seat back pad 1C and its molding die will be described with reference to FIGS.

  8 is a front view of the seat back pad 1C, FIG. 9 is a cross-sectional view taken along the line IX-IX in FIG. 8, FIG. 10 is an enlarged view of a part of FIG. It is sectional drawing of the metal mold | die for 1C shaping | molding.

  This seat back pad 1C is provided with a headrest hole 8 in the seat back pad 1A shown in FIGS.

  In the mold 10 shown in FIG. 11 for forming the seat back pad 1C, the headrest hole 8 is formed from the tip of the protruding portion of the core 13 for forming the cavity 4. The pin 15 is projected. Other configurations of the mold 10 are as described above.

  As shown in FIG. 10, a through hole 3a into which the pin 15 is inserted is provided in advance in the shock absorber 3A. The support material 5 is also provided with an opening (reference numeral omitted) through which the pin 15 is inserted. The shock absorber 3A is held by the core 13 so that the pin 15 is inserted into the through hole 3a, and a portion near the pin 15 of the core 13 is clamped by the elastic force of the shock absorber 3A itself. Is done. Since the through hole 3a penetrates the shock absorbing material 3A, the positioning of the pin 15 and the through hole 3a is extremely easy, and the shock absorbing material 3A can be easily mounted and held on the core 13. .

  The molding procedure of the seat back pad 1C is the same as that in the above embodiment.

In this embodiment, the shock absorber 3A is held not only by the elastic holding of the shock absorber 3A but also by the engagement of the through hole 3a and the pin 15 with respect to the core 13, so that the shock absorber 3A is held. 3A can be stably held with respect to the core 13. Further, the core 13 does not have a dedicated protrusion (such as a set pin) for holding the foamed molded body 12 other than the headrest hole forming pin 15, and the configuration of the mold 10 is simple.

  Each of the above embodiments is an example of the present invention, and the present invention may be configured other than illustrated.

It is a front view of the seat back pad concerning an embodiment. It is sectional drawing which follows the II-II line of FIG. It is an enlarged view of the upper part of FIG. It is a front view of the seat back pad concerning another embodiment. It is sectional drawing which follows the VV line of FIG. It is sectional drawing of the metal mold | die for shaping | molding a seat back pad. It is a front view of the seat back pad concerning another embodiment. It is a front view of the seat back pad concerning another embodiment. It is the IX-IX sectional view taken on the line of FIG. It is an enlarged view of the upper part of FIG. It is sectional drawing of the metal mold | die for seat back pad shaping | molding.

Explanation of symbols

1, 1A, 1B, 1C Seat back pad 2 Seat back pad body 3, 3A, 3B Shock absorber 4 Cavity 5 Supporter 6 Overhang 10 Mold 11 Upper mold 12 Lower mold 13 Core

Claims (11)

  A seat back pad comprising: a seat back pad main body made of a foam material; and an impact absorbing material disposed on at least a rear surface side of the seat back pad main body.   2. The seat back pad according to claim 1, wherein the impact absorbing material is integrally foamed with the seat back pad main body.   3. The seat back pad according to claim 1, wherein the impact absorbing material is made of a foamed molded body.   4. The seat back pad according to claim 3, further comprising a supporter material that covers the shock absorbing material.   5. The seat back pad according to claim 3, wherein the shock absorbing material is made of expanded polystyrene. 6. The seat back pad according to claim 4, wherein the support material is made of at least one nonwoven fabric of polypropylene, polyethylene, polyethylene terephthalate, acrylic, wool, rayon and polyester having a basis weight of 10 to 300 g / m ^2. . In any one of Claims 1 thru | or 6, the upper back surface side of the said seat back pad is an overhang | projection part projected on the back center side of a seat back pad,
A seat back pad, wherein at least a part of the overhang portion is made of the shock absorbing material.   8. The seat back pad according to claim 7, wherein the impact absorbing material is disposed on a front side of the overhanging portion, and a rear side of the overhanging portion is made of a foam material of the seat back pad main body. In Claim 7 or 8, the seat back pad includes a headrest hole,
The seat back pad, wherein the headrest hole penetrates the shock absorbing material.   A vehicle seat comprising the seat back pad according to claim 1 and a frame to which the seat back pad is attached.   The vehicle seat according to claim 10, wherein the shock absorber is disposed so as to be supported by the frame.

Images