JPH0748115Y2 - Cushion pad with bank - Google Patents

Description

TECHNICAL FIELD The present invention relates to an improvement of a cushion pad having a bank portion for assembling a seat cushion, a seat back or a headrest of an automobile seat.

2. Description of the Related Art Generally, for example, a cushion pad for assembling an automobile seat is generally made of a soft foam resin including a seat surface portion 1 and left and right bank portions 2 as shown in FIG. Since this cushion pad is soft as a whole, it is inferior in holdability, and when the seat cover is assembled, it becomes round and lacks sharpness, and the bank portion 2 is easily crushed and the seat cover is easily wrinkled.

In addition, as shown in FIG. 7, there is one in which a seat surface portion 1 of soft foamed resin and a bank portion 2 of hard foamed resin are integrally formed. Since this cushion pad has a tight hold property, it is suitable for sports cars, but the bank portion 2 is hard overall, which makes it feel uncomfortable when getting on and off, and is not suitable for equipping a luxury car such as a sedan. .

Further, as shown in FIG. 8, the outer side 2a of the bank portion 2 is formed of hard foam resin together with the seat surface portion 1, and the inner side 2b of the other half is formed.
Is formed of a soft foam resin together with the seat surface portion 1. This cushion pad is preferable because it exerts an appropriate holding property, and the entire shape of the seat is crisp, so that the seat skin can be prevented from wrinkling.

However, since the boundary 2c between the hard outer side 2a and the soft inner side 2b is located near the top surface of the bank portion 2, the boundary 2c appears linearly on the outer surface of the seat skin, which is not preferable in terms of appearance. In addition, there is a risk that the boundary 2c between the layers will be felt when getting on and off, and that the boundary 2c will be separated due to delamination due to repeated getting on and off.

In order to solve the problem of the cushion pad shown in FIG. 8 among the above-mentioned conventional examples, for example, in a cushion pad for a seat cushion, a boundary is located on the side surface of the bank portion and a soft surface layer portion and a hard surface layer portion are formed. The back layer portion may be integrally formed.

However, even in this case, it is preferable to form the layers integrally by arranging the boundary on the side surface near the top of the embankment in order to provide an appropriate holding property. However, since the boundary is located at a position where the occupant can visually recognize it and is easily touched each time the passenger gets in and out of the vehicle, the appearance of the entire seat is impaired or an uncomfortable feeling due to a significant difference in hardness is felt, so that a problem still remains.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In the present invention, the boundary between the surface layer part of the soft foamed resin and the back layer part of the hard foamed resin is located on the side surface near the top of the bank to form each layer integrally. Another object of the present invention is to provide a cushion pad having a bank portion which is improved in appearance so as not to give a feeling of strangeness due to a difference in hardness.

Means for Solving the Problems In a cushion pad having a bank portion according to claim 1 of the present invention, a boundary between a surface layer portion of a soft foamed resin and a back layer portion of a hard foamed resin is located near the top of the bank portion. It is located on the part surface, the end of the surface layer is extended more to the side than the back layer, and the extended end of this surface layer is covered near the side surface of the back layer to form the surface layer and the back layer. It is configured by covering the boundary with the part with the end of the surface layer part.

In the cushion pad having the bank portion according to the second aspect of the present invention, the corner surface of the back layer portion covered by the end portion of the surface layer portion is formed by curving a circular arc surface.

In the cushion pad having the bank portion according to claim 1 of the present invention, the boundary of each layer is covered by covering the end portion of the surface layer portion, which is extended laterally with respect to the back layer portion, toward the side surface of the back layer portion. From
The soft difference can be gradually eased to eliminate the discomfort due to the difference in softness between the top surface and the side surface of the bank, and the boundary due to this soft difference can appear on the outer surface of the seat skin. Can be prevented.

In the cushion pad having the bank portion according to the second aspect of the present invention, since the corner surface of the back layer covered with the end of the surface layer is curved to be an arc surface, the difference in soft hardness can be reduced, as a matter of course. It is possible to reliably prevent a sense of harmony and the appearance of boundaries.

Example The following is a description with reference to FIGS. 1 to 5.

The cushion pad shown in FIG. 1 is formed as an assembly of a bucket-shaped automobile seat cushion having left and right bank portions.

As shown in FIG. 2, the cushion pad is formed of a relatively low seating surface portion 10 corresponding to the seat shape and a bank portion 11 that projects diagonally to the left and right (only one side is shown). The seat surface portion 10 is formed of a soft foam resin having a total thickness, and the bank portion 11 continuous from the seat surface portion 10 has a surface layer portion 11a formed of a soft foam resin of the same material as the seat surface portion 10.

The bank portion 11 is integrally formed of a hard foam resin so that the back layer portion 11b supports the surface layer portion 11a. This surface layer 11
The a and the back layer 11b are formed so that a boundary 11c is located on the side surface near the top of the bank 11. Also, the surface layer 11a
Extends the end 11d laterally beyond the back layer 11b,
It is formed so as to cover d the boundary 11c by covering d on the side surface of the back layer 11b. The corner surface 11e of the back layer 11b may be formed by curving a gentle arc surface. Each part of the cushion pad can be formed to have a required hardness by using foamed resin such as soft and hard urethane foam.

This cushion pad can be integrally molded as a whole with a mold including a cavity mold m ₁ and a core mold m _{2 as} shown in FIG. The cavity mold m ₁ of the mold has a back layer 11
A partition plate P having a curved bottom surface corresponding to the corner surface 11e of b is provided inside so as to serve as a resin pool of hard foamed resin. Further, the partition plate P is provided with a space S that forms the end 11d of the surface layer 11a so as to wrap around below the root. In this mold, the bottom side of the cavity mold m ₁ is filled with the soft foam resin through the partition plate P, and the hard foam resin is filled inside the partition plate P and simultaneously foamed after the mold clamping. Each part can be integrally formed.

The cushion pad foam-molded by the mold is formed by separating the part corresponding to the partition plate P when the whole is released from the mold. However, since this margin is formed integrally with both, the end portion 11d of the surface layer portion 11a by the space S of the mold is connected to the back layer portion 11a.
The entire body can be assembled by simply covering it on the side of b.

In the cushion pad, the thick side l ₁ of the surface layer 11a
Is formed to about 10 to 30 mm, and the thin side l ₂ is 10 to 15 mm.
It may be formed to some extent. Further, it suffices if the end portion 11d of the surface layer portion 11a is formed so as to extend laterally by about 3 to 5 mm from the back layer portion 11d.

In the cushion pad configured as described above, the cushion pad is placed on the seat frame, and the entire seat is covered with the seat cover.
The seat cushion can be used to assemble the seat cushion by winding and fixing the end of the seat skin on the seat frame.

In the seat cushion, the hard back layer portion 11b counteracts the pulling of the seat surface, so that the overall shape can be made sharp, and therefore wrinkles can be prevented from occurring in the seat surface.

Further, the boundary 11c is covered by the end portion 11d of the soft surface layer portion 11a being bent and deformed by the tensile force of the seat skin so as to go over the boundary portion 11c and be covered by the side surface of the hard back layer portion 11.
Therefore, since the hardness of the side portion of the back layer portion 11d gradually changes from the soft layer to the hard layer due to the thickness of the side portion 11d, there is no significant difference in soft hardness. Along with this, it is possible to prevent the appearance of streak lines due to the boundary of the soft hardness difference on the outer surface of the seat skin, and each layer 11a,
It can also prevent delamination of 11b.

Since the surface layer portion 11a of the bank portion 11 including the seat surface portion 10 is formed of the soft foamed resin, good cushioning properties can be exhibited together with the hard back layer portion 11b. In particular, it is preferable to form the corner surface 11e of the back layer 11b covering the end 11d of the surface layer 11a by bending it into a circular arc surface because the surface layer 11a can be turned into a gentle curved shape without corners. .

Although the above-mentioned embodiment shows the cushion pad of the seat cushion, it can be similarly applied to form the cushion pad of the seat back as shown in FIG. The cushion pad has a seat surface portion 20 and a bank portion.
The surface layer portion 21a of 21 is continuously formed of a soft foam resin, and the back layer portion 21b is integrally formed with the surface layer portion 21 of the bank portion 21 by a hard foam resin so as to separate the seat frame assembly space 22. Has been done. Even with the cushion pad, the boundary of each layer
The end 21d of the surface layer portion 21a may be formed to extend laterally beyond the back layer portion 21b via the 21c so as to be covered with the boundary 21a.

In addition to the above-described seat cushion and seat back cushion pad, the present invention can be applied when forming a headrest cushion pad as shown in FIG.
In this cushion pad, the front portion side is the cushion pad body, and the bank portion is formed on the left and right side portions so as to be more raised than the depression in the center of the front portion. Surface layer located on the front side
30 is made of soft foamed resin, and the back layer located on the rear side
The 31 may be integrally formed so as to be formed of hard foam resin. Although this boundary (not shown) is located on the peripheral side surface, the end 30a of the surface layer 30 may be formed to extend laterally beyond the back layer 21 along the boundary.

Effects of the Invention As described above, according to the cushion pad having the bank portion according to the present invention, the boundary line due to the difference in soft hardness does not appear on the outer surface, and the feeling of strangeness is not felt. It is possible to assemble products that exhibit excellent cushioning properties.

[Brief description of drawings]

FIG. 1 is an explanatory view showing each portion for an automobile seat as a cushion pad according to the present invention, and FIG. 2 is an AA of FIG.
3 is a partial sectional view of a cushion pad for a seat cushion shown by a line, FIG. 3 is a partial sectional view of a mold used to mold the seat cushion pad, and FIG. 4 is B- in FIG.
FIG. 5 is a partial cross-sectional view of the cushion pad for a seat back shown by line B, FIG. 5 is a perspective view showing a cushion pad for a headrest as a cushion pad according to the present invention, and FIGS.
The drawing is a partial cross-sectional view showing another cushion pad according to the conventional example. 10: Cushion pad main body, 11: Bank portion, 11a, 21a, 30: Surface layer portion, 11b, 21b, 31: Back layer portion, 11c, 21c: Border line, 11d, 21d, 3
0a: Edge of surface layer, 11e: Corner surface of back layer.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location // B29K 105: 04 B29L 31:58

Claims (2)

[Scope of utility model registration request] 1. A cushion pad main body (10) is formed of a soft foam resin, and a soft foam resin surface layer portion (11a, 21a, 30) continuous from the cushion pad main body (10) and a hard foam resin In the cushion pad integrally forming the bank part (11) from the back layer part (11b, 21b, 31), the boundary between the surface layer part (11a, 21a, 30) and the back layer part (11b, 21b, 31) (11c, 21c) is located on the side surface near the top of the bank part (11), and the end part (11d, 21d, 30) of the surface part (11a, 21a, 30)
a) extends laterally beyond the back layer (11b, 21b, 31) and the extended end (11d, 21d, 30) of this surface layer (11a, 21a, 30)
a) on the side of the back layer (11b, 21b, 31) close to the surface (11a, 21a, 30) and the back layer (11b, 21b, 31) and the boundary (11c, 21c) Ends (11d, 21) of the surface layer (11a, 21a, 30)
Cushion pad having a bank portion characterized by being covered with d, 31a). 2. The end portions (11d, 21) of the surface layer portion (11a, 21a, 30)
The cushion pad having a bank portion according to claim 1, wherein a corner portion surface (11e) of the back layer portion (11b, 21b, 30) covered with d, 30a) is curved to an arc surface.