JP2010284249A - Seat cushion pad - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To propose a seat cushion pad that does not lose a ride quality but restrains tottering. <P>SOLUTION: The seat cushion pad is arranged with a seat cushion pad body 2 made of soft foaming resin jointed with a pair of hard members on the back side of the seat cushion pad body 2 in the width direction. The sectional shape of the hard member 3 in the width direction is like a wedge. The hard member 3 is elongated within the area of 60-140 mm outside of the center face and width direction of the seat cushion pad body 2 within the section in the width direction and is disposed at the position in the area of 10-30 mm measured from the side edge of the surface of the seat cushion pad body 2 in the thickness direction. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a seat cushion pad mainly composed of a foamed resin material used for, for example, an automobile seat.

  Seat cushion pads for vehicles used in automobiles, etc. are usually provided with a rigid member partially around the periphery of a soft foam resin such as polyurethane foam that forms the seat cushion pad body, thereby stabilizing the seated person's support. It is intended to improve the comfort at the time of sitting after securing safety and safety, and to reduce the feeling of fatigue when sitting for a long time.

  However, with such a seat cushion pad, it is possible to improve the holdability for a relatively large lateral force for a seated person such as during cornering, but a relatively small lateral direction when changing lanes during traveling. There has been a problem that a so-called wobble is generated in which the seat is not stable and unstable from the hips of the seated person to the waist with respect to the acceleration (about 0.1 G).

  Therefore, in order to suppress such wobbling with respect to a relatively small lateral force, for example, as disclosed in Patent Document 1, a predetermined portion of the seat cushion pad is provided between the seat frame and the seat cushion pad. Raise the bottom of the seat to increase the hardness of the seat surface, and as disclosed in Patent Document 2, the polyethylene foam is accommodated in the mold and polyurethane is not contained in the mold. Proposed to improve the wobble feeling of the buttocks by injecting foaming raw material, forming a pad of different hardness with polyethylene foam embedded in a predetermined part during polyurethane foaming, and reducing the bending of the seating surface Has been.

  However, in these conventional techniques, when the seat surface hardness is increased, the seat cushion pad is less bent when seated, so the hip point corresponding to the position of the hip joint point corresponding to the rotation center between the torso and thigh changes. In addition, it is difficult to insert a hard member (different hardness pad) at an appropriate position, and the ride comfort and the feeling of foreign matter cannot be denied.

Japanese Patent Laid-Open No. 11-309038 Japanese Patent Laid-Open No. 1-249312

  The present invention relates to a seat cushion pad, and in particular, proposes a seat cushion pad that suppresses wobble without impairing riding comfort.

  In the seat cushion pad of the present invention, a seat cushion pad body made of a soft foam resin and a pair of hard members are joined and arranged on the outer side in the width direction on the back surface side of the seat cushion pad body. The cross-sectional shape in the width direction is wedge-shaped, and the hard member is separated within the range of 60 to 140 mm outward from the center surface of the seat cushion pad body in the width direction, and the surface of the seat cushion pad body. It is characterized by being arranged at a position in the range of 10 to 30 mm as measured in the thickness direction from the side edge.

  In such a seat cushion pad, more preferably, the hard member has a ratio of the width dimension to the thickness dimension in the range of 0.8 to 1.4 in the cross section in the width direction.

In the seat cushion pad of the present invention, in particular, the cross-sectional shape of the hard member in the width direction is wedge-shaped, and the hard member has a width in the range of 60 to 140 mm on the center surface of the seat cushion pad main body and the outer side in the width direction. High hardness compared to the seat cushion pad body made of soft foamed resin by separating at the position x and placing it at the position y in the range of 10-30mm measured in the thickness direction from the side edge of the surface of the seat cushion pad body For example, an inclined surface is formed in the front and rear direction immediately below the buttock or immediately below the buttock and in the width direction narrower than the conventional seat cushion pad in the width direction. As shown in the rear view in FIG. 1, this seat cushion pad has a 50 kg SAE standard hip point measurement mannequin seated on the seat cushion pad, and measures the tilt angle when a load is applied in the horizontal direction. As shown in FIG. 2, the inclination of the straight line is smaller than that of the conventional seat pad, the amount of lateral deflection of the seat cushion pad is reduced, and the feeling of foreign objects at the time of sitting is reduced without impairing the ride comfort. Without feeling, the inclination of the seated person with respect to the lateral load can be reduced.
In addition, even if the seat cushion pad of the present invention is installed on the S spring provided on the cushion frame, the seat cushion pad can be moved independently on the left and right sides. can do.

  That is, when the position x is less than 60 mm, there is a possibility that the hard member feels a foreign object at the time of sitting.

  On the other hand, when the position y is less than 10 mm, there is a risk of feeling a foreign material of the hard member at the time of sitting.

It is a rear view of the inclination evaluation measuring apparatus of an upper body. It is a figure which shows the result of having measured the inclination angle of the upper body at the time of applying a load to a horizontal direction. It is a bottom view which shows one Embodiment of the seat cushion pad of this invention. FIG. 4 is a partially enlarged sectional view taken along arrow IV-IV in FIG. 3. It is a bottom view which shows other embodiment of the seat cushion pad of this invention, (b) is a figure which shows a part of hard member of (a). 5A is a partially enlarged cross-sectional view taken along line AA in FIG. 5A, FIG. 5B is an enlarged cross-sectional view taken along the line BB in FIG. 5A, and FIG. 5C is FIG. FIG. 5D is an enlarged sectional view taken along the line D-D of FIG. 5A, and FIG. 5E is an enlarged sectional view taken along the line E-E of FIG. And (f) is the FF line | wire cutting part expanded sectional view of Fig.5 (a). It is a perspective view which shows a part of seat frame.

Hereinafter, the seat cushion pad of the present invention will be described in detail with reference to the drawings.
FIG. 3 is a bottom view showing one embodiment of the seat cushion pad of the present invention, and FIG. 4 is a partially enlarged sectional view taken along arrows IV-IV in FIG.
In the figure, reference numeral 1 denotes a seat cushion pad. The seat cushion pad 1 includes a seat cushion pad main body 2 made of a soft foamed resin material and a lower side portion of the seat cushion pad main body 2 in the figure. And a pair of hard members 3 made of a bead foam having a substantially wedge-shaped cross-sectional shape with a thickness gradually reduced toward the center of the width.
Here, the overall size of the seat cushion pad body 2 can be in the range of 450 to 600 mm, and the thickness can be in the range of 50 to 130 mm.

  Here, the seat cushion pad body 2 has a so-called monofoam structure basically composed of only a soft foamed resin material having a single hardness, and the seat cushion pad body 2 has a required physical property, for example, a hard hardness. Since the side 3 can be hardened by arranging the member 3, the seat cushion pad provides contradictory physical properties such as ride comfort, holdability and ease of getting on and off, which are difficult to achieve with the monofoam structure alone. 1 can be given.

In the seat cushion pad 1, the hard member 3 is positioned within the range of 60 to 140 mm on the center plane and the width direction outside of the seat cushion pad main body 2 in the cross section in the width direction passing through the hip point (HP) in the figure. Separated by x, the sheet cushion pad body 2 is disposed at a position y in the range of 10 to 30 mm as measured in the thickness direction from the side edge of the surface of the seat cushion pad body 2.
Preferably, the hard member 3 is effectively reduced in wobble by being inserted in the range of 160 to 170 mm around the hip point (HP), and is in the range of about 20 to 30 mm from the surface of the seat cushion pad main body 2. The foreign object feeling can be reduced by inserting it in isolation. When the hard member 3 is a lighter member than the seat cushion pad main body 2, the seat cushion pad 1 can be reduced in weight by widening the insertion range of the hard member 3.

The soft foam resin material of the seat cushion pad main body 2 may be a foam resin material having elasticity and the like, and polyurethane foam is preferable from the viewpoint of moldability and sitting comfort.
The hard member 3 may be a bead foam made of a synthetic resin such as an olefin resin, but is particularly lightweight, and polystyrene foam is preferable from the viewpoint of heat insulation, buffering of external stress, and durability.

  According to such a seat cushion pad 1, when the seat cushion pad 1 is deformed in the crushing direction by a load due to the seating of the occupant, the seat cushion pad main body 2 is mainly deformed, so that the pressure applied to the buttocks and thighs is homogenized. The pressure fluctuation is sufficiently small. On the other hand, the pair of hard members 3 can positively support the occupant.

  More preferably, the ratio of the width direction dimension a to the thickness dimension b (b / a) is in the range of 0.8 to 1.4, and the rigid member 3 is inserted into this range, so that the rigid member 3 is seated. However, the stability of the support from the buttocks to the waist is maintained without feeling a foreign object, and the wobble feeling can be suppressed.

Fig.5 (a) is a bottom view which shows other embodiment of the seat cushion pad of this invention, (b) is a figure which shows a part of hard member of (a). 6A is a partially enlarged sectional view taken along the line AA in FIG. 5A, FIG. 6B is an enlarged sectional view taken along the line BB in FIG. 5A, and FIG. Fig. 5A is an enlarged sectional view taken along the line CC of Fig. 5A, Fig. 5D is an enlarged sectional view taken along the line DD of Fig. 5A, and Fig. 5E is an enlarged sectional view taken along the line EE of Fig. 5A. Sectional drawing and (f) are FF line cutting | disconnection parts expanded sectional views of Fig.5 (a).
In this embodiment, an outer peripheral frame 14 is provided on the side portion of the seat cushion pad 11, and a spring receiving surface 14 a is provided on the bottom portion of the frame 14.
In the outer peripheral frame 14 provided with the spring receiver 14a, the seat surface bends downward with the spring receiver surface 14a as a fulcrum, so that the hard member 13 is placed wider than the seat cushion pad shown in FIG. It is preferable to insert in the range of 20 to 30 mm from the side edge of the surface of the pad.

In the seat cushion pad 11, the hard member 13 is placed on the seat cushion pad main body 12 in the width direction cross section passing through the hip point in FIG. And the outer side in the width direction at a position x in the range of 60 to 140 mm, measured from the side edge of the surface of the seat cushion pad main body 12 in the thickness direction, and arranged at a position y in the range of 20 to 30 mm. To do.
The overall size of the seat cushion pad body 12 can be 450 to 600 mm, and the thickness can be 50 to 130 mm.

Such a seat cushion pad is manufactured, for example, by positioning and placing a hard member formed in advance on a molding surface of a mold, supplying a stock solution of a soft foamed resin material to the mold, The undiluted solution can be heated and foam-molded, and after completion of the foaming, the foam-molded resin material is cured, the mold is opened, and the mold is removed.
In this case, since the hard member positioned and arranged on the molding surface is bonded to and integrated with the seat cushion pad body, the mold is smoothly released from the mold together with the seat cushion pad body.

  In addition, a hard member such as polystyrene foam is positioned under the seat cushion pad as shown in the perspective view of FIG. Therefore, insert molding is preferable in manufacturing the seat cushion pad.

  Next, Example Seat Cushion Pads 1-7, Comparative Example Seat Cushion Pads 1 having the structure as shown in FIGS. 3 and 4 and changing the respective specifications as shown in Table 1, FIGS. The seat cushion pads 8 to 14 and the comparative example seat cushion pad 2 having the structure as shown in FIG. 2 and having the respective specifications changed as shown in Table 2 were produced as prototypes to provide a feeling of wobbling and a foreign object. Evaluated with a ring.

Example seat cushion pads 1 to 14 and comparative example seat cushion pads 1 and 2 are assumed to be a lane change for five panelists, and the swaying feeling and foreign body sensation of the buttocks when the upper body is slightly swung left and right Are evaluated by the paired comparison method, and the results are shown in Tables 3 and 4.
The values in the table indicate that ◎ is the best, ○ is good, Δ is normal, and x is bad.

  From the results of Tables 3 and 4, the example seat cushion pads 1 to 14 were able to improve the wobble feeling and the foreign object feeling as compared with the comparative example seat cushion pads 1 and 2.

1,11 Seat cushion pad 2,12 Seat cushion pad body 3,13 Hard member 14 Outer frame 14a Spring bearing surface

Claims (2)

In the seat cushion pad formed by joining and arranging a pair of hard members on the outside in the width direction on the back side of the seat cushion pad body, the seat cushion pad body made of a soft foam resin,
The cross-sectional shape of the hard member in the width direction is wedge-shaped, and the hard member is separated within the range of 60 to 140 mm from the center surface of the seat cushion pad body to the outside in the width direction within the cross-section in the width direction. A seat cushion pad, wherein the seat cushion pad is arranged at a position in the range of 10 to 30 mm as measured in the thickness direction from the side edge of the surface of the seat.   The seat cushion pad according to claim 1, wherein the hard member has a width-direction to thickness-dimension ratio in a range of 0.8 to 1.4 within a cross-section in the width direction.

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