JP2001327359A - Headrest for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a headrest for a vehicle having a lightweight pillar with a large bending strength with simple constitution. SOLUTION: This headrest for the vehicle is constituted by mounting a vehicular seat with a headrest frame comprising a headrest plate and a pillar member rigidly fixed to the headrest plate. The pillar member has a hollow part, and foam resin is filled at least partially in the hollow part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle headrest, and more particularly to a vehicle headrest having a structure in which a headrest pillar member is inserted into a top end of a backrest of a vehicle seat and fixed by a guide member.

[0002]

2. Description of the Related Art It is generally known that a headrest for a vehicle has a headrest plate inside, and a headrest pillar member made of a hollow steel pipe is fixed to the headrest plate.

[0003] This vehicle headrest is configured such that a headrest pillar member is inserted into the upper end of a backrest of a vehicle seat and fixed by a guide member, so that the height of the headrest can be adjusted.

[0004]

As described above, the headrest for a vehicle is formed by a headrest plate formed by press molding and a headrest pillar member for fixing the headrest plate to a vehicle seat back.

The headrest pillar member of the vehicle headrest is formed of a hollow steel pipe so as to be lightweight and have sufficient rigidity. However, when the headrest pillar member is made of a hollow steel pipe in this way, when an excessive bending moment is applied to the headrest pillar member, the section is deformed due to the deformation of the cross section, and the bending rigidity is reduced.

[0006] In order to solve the above inconvenience, there is known a headrest pillar member having a structure in which an expensive ultra-high-strength steel pipe having a specially increased strength is used or the thickness of the steel pipe is increased.

However, when the headrest pillar member is formed of the thick steel pipe having the above structure, there is a problem that the weight increases. In addition, ultra-high-strength steel pipe has trouble in production,
This was causing cost increase.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to provide a vehicle headrest having a headrest pillar member having a simple structure, light weight and high bending strength.

[0009]

According to the first aspect of the present invention, an upper portion of a headrest frame having a headrest plate and a headrest pillar member provided below the plate is provided with a pad and a skin material. In the covered vehicle headrest, the headrest pillar member has a hollow portion, and the problem is solved by filling at least a part of the hollow portion with the foamed resin.

As described above, according to the first aspect of the present invention, the steel pipe constituting the headrest pillar member has the hollow portion, and at least a part of the hollow portion is filled with the foamed resin. It is possible to provide a headrest for a vehicle having a light weight and a large bending strength headrest pillar member with a simple configuration.

The foamed resin filled in the hollow portion includes, for example, urethane foam, polypropylene foam, polystyrene foam, polyethylene foam,
Acrylonitrile-any of styrene resin foams,
Or use a combination. These foamed resins are
Excellent in heat resistance, cost and durability. Also,
Since they have different properties, they can be properly used depending on the structure of the headrest, the size of the pillow, and the like.

When a urethane foam is used, foaming a urethane stock solution having a density of 0.010 to 0.100 to form a foam exhibits excellent performance in all of heat resistance, oil resistance and durability. It is suitable.

Further, by forming the foamed resin by bead foaming, when the headrest pillar member is filled with a material, a space can be secured between the material beads,
The steam for heating the raw material of the foamed resin can be evenly distributed. In this way, a higher quality foamed resin can be obtained.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A vehicle headrest 10 according to the present invention.
Is formed at the top of the vehicle seat 1 and includes a headrest plate 101 that is press-formed and a headrest pillar member 102 for fixing to a vehicle seat back.

The headrest pillar member 1 of this embodiment
In No. 02, the steel pipe constituting the headrest pillar member 102 has a hollow portion, and at least a part of the hollow portion is filled with the foamed resin 103. In addition, the foamed resin 103 may be filled only in the portion of the headrest pillar member 10 where the largest bending moment is likely to occur.

As the foamed resin, any one of urethane foam, polypropylene foam, polystyrene foam, polyethylene foam and acrylonitrile-styrene resin foam is used. It is also possible to use these various foamed resins in appropriate combinations.

When urethane foam is used as the foamed resin, a higher-quality urethane foam can be obtained by foaming a urethane stock solution having a density of 0.010 to 0.100.

The headrest pillar member 10 is made of foamed resin.
2 is formed by filling the hollow portion with a foamed resin material, and further heating and foaming the hollow portion. As a method for forming the foamed resin, if a method of bead foaming in which foam beads are charged into a hollow portion and the foam beads are steam-heated to form a foam is selected, steam spreads through the space between the material beads. And a uniform foam can be obtained.

[0019]

An embodiment of the present invention will be described below with reference to the drawings. The members, arrangements, and the like described below do not limit the present invention, and can be variously modified within the scope of the present invention.

FIGS. 1 and 2 show one embodiment of a vehicle headrest according to the present invention. FIG. 1 is an explanatory view showing a vehicle headrest in a state of being filled with a foamed resin, including a partially cut-away portion. FIG. 2 is a view showing a state of filling with a foamed resin.
It is AA sectional drawing of.

The headrest 10 for a vehicle in this embodiment is
It is used as a head support pillow of an automobile and includes a press-formed headrest plate 101, a pair of headrest pillar members 102, a pad 104, and a skin material 105 covering the pad 104. I have. The headrest pillar member 102 is the same as that shown in FIG.
As shown in the figure, it has a U-shape, both ends are free ends, a center part is fixed to the headrest plate 101, and both ends are mounted on the vehicle seat 1 and supported so as to be able to move up and down. Although the vehicle headrest 10 of this example has the above-described configuration, various modes can be considered for the connection between the headrest plate 101 and the pair of headrest pillar members 102, the relationship with the pad 104, and the like. For example, a headrest plate of a vehicle headrest and a so-called perforated headrest configured such that a headrest plate is square-shaped and the center is a space, a headrest pillar member is connected, and a pad is arranged around the headrest plate. Various aspects can be considered for the relationship with the headrest pillar member.

The headrest pillar member 102 of this embodiment is filled with a foamed resin. As the foamed resin, a resin which is advantageous in terms of cost and is hardly deteriorated is used.

In order to obtain a foamed resin satisfying the above conditions, several kinds of raw materials were compared and studied. Evaluation items in the comparison were cost and durability. As a result of a comparative study, it was found that urethane foam, polypropylene foam, polystyrene foam, polyethylene foam, and acrylonitrile-styrene resin foam were suitable as foamed resins. Since the foamed resin has different characteristics, an appropriate foamed resin is selected according to the size and structure of the headrest pillar member. For example, when importance is placed on cost, a configuration in which a polystyrene foam is selected and the above foamed resins are combined as necessary may be employed.

Particularly, urethane foam has heat resistance, oil resistance, low cost, and is suitable. In addition, urethane foam has a high degree of adhesion and good mechanical properties (viscosity), and thus has a characteristic of easily absorbing vibration. further,
Since the foaming speed is relatively slow, molding can be easily performed in the internal space of the headrest pillar member.

In the formation of the foamed resin, a method of bead foaming in which foamed beads are charged into the hollow portion of the headrest pillar member and the foamed beads are heated to form a foam may be selected. The foamed resin may be filled at a location where a bending moment is likely to be generated, for example, only a portion exposed below the pad is filled with the foamed resin.

When only a part of the space inside the headrest pillar member 102 is filled with the foamed resin, the headrest pillar member 10 is formed when the vehicle headrest 10 is formed.
If a wall is formed in advance between the space filled with the foamed resin and the space not filled with the foamed resin in 2,
A desired location can be appropriately filled with the foamed resin, which is preferable.

The cooling and drying of the headrest pillar member 102 after filling with the foamed resin may be carried out naturally, but if the cooling is performed in a short time, the cooling and drying can be carried out in a short time. Can be performed.

[0028]

As described above, according to the present invention, since the headrest pillar member has a configuration in which the hollow portion is filled with the foamed resin, the headrest pillar member having a simple configuration, light weight and large bending strength is provided. It is possible to provide a vehicle headrest provided with the headrest.

The foamed resin filled in the hollow portion includes, for example, urethane foam, polypropylene foam, polystyrene foam, polyethylene foam,
Acrylonitrile-styrene resin foam is used.
These foamed resins have different properties in terms of cost and durability, and can be properly used depending on the structure, size, and the like of the headrest.

When a urethane foam is used, foaming a urethane stock solution having a density of 0.010 to 0.100 to form a foam provides excellent performance in all of heat resistance, oil resistance and durability. It is suitable.

By forming the foamed resin by bead foaming, a foam having a more uniform cell structure can be obtained, which is preferable.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a vehicle headrest in a state of being filled with a foamed resin, including a partially cutaway portion.

FIG. 2 is a cross-sectional view of the pillar of FIG.
It is sectional drawing.

[Explanation of symbols]

 Reference Signs List 10 vehicle headrest 101 headrest plate 102 headrest pillar member 103 foam resin 104 pad 105 skin material

Claims (4)

[Claims] 1. A vehicle headrest comprising a headrest frame provided with a headrest plate and a headrest pillar member provided below the headrest plate, the upper portion of which is covered with a pad and a skin material, wherein the headrest pillar member has a hollow portion. A headrest for a vehicle, wherein at least a part of the hollow portion is filled with a foamed resin. 2. The vehicle headrest according to claim 1, wherein the foamed resin is any one of urethane foam, polypropylene foam, polystyrene foam, polyethylene foam, and acrylonitrile-styrene resin foam or a combination thereof. 3. The urethane foam has a thickness of 0.010 to 10.
3. The vehicle headrest according to claim 2, wherein a urethane stock solution having a density of 0.100 is foamed. 4. The vehicle headrest according to claim 2, wherein the foamed resin is formed by bead foaming.