JP5673381B2 - Vehicle seat - Google Patents

Description

  The present invention relates to a vehicle seat including a cushion material and a linear support member (a member capable of supporting the cushion material).

As this type of vehicle seat, a vehicle seat provided with a seat cushion and a seat back is known (see Patent Document 1).
The seat back is a member that is connected to the seat cushion so as to stand upright, and includes a frame member (substantially rectangular shape) forming a seat skeleton, a cushion material, and a pair of support members.
The pair of support members are linear members that extend in the longitudinal direction of the frame member, respectively, and bend in a crank shape (in the seat width direction) along the way.

Further, the cushion material is a member (made of polyurethane foam) that elastically supports an occupant with an outer shape of the seat, and has a raised portion and a backing material.
The raised portion is a semi-cylindrical convex portion (an arc shape or the like in a cross-sectional view) raised at the center of the back surface of the cushion material, and extends in the longitudinal direction of the cushion material. The backing material is a planar member (spunbond nonwoven fabric) that is inferior to the cushion material and can be disposed on the back side of the cushion material.

In the known technique, a pair of support members are attached to the frame member and extend in the longitudinal direction of the seat. Then, the cushion material is disposed in the frame member, and at this time, the cushion material is supported by the pair of support members while the raised portion is disposed between the pair of support members.
By the way, with this type of seat configuration, there is a concern that the seating property of the seat may deteriorate due to the cushion material being crushed by an occupant load. Therefore, in the known technology, the seating property of the seat can be maintained satisfactorily by offsetting the pressing force (occupant load) received by the cushion material as much as possible by the repulsive force of the raised portion (the shrinkage force of the backing material).

JP 2011-10748 A

By the way, in the publicly known technology, a raised portion (a portion where the shrinkage force of the backing material suitably acts) is formed between the pair of support members (part of the cushion material).
For this reason, in the known technology, when the occupant moves during cornering, etc., the cushion member is not supported because the occupant's pressing force is applied to the other part of the cushion material (the part where the raised part is not formed). Sometimes it was enough.
The present invention has been devised in view of the above points, and a problem to be solved by the present invention is to further improve the support performance of the cushion material.

As means for solving the above-mentioned problems, the vehicle seat of the first invention has a seat constituent member such as a seat cushion or a seat back. The seat constituent member includes a frame member that forms a seat skeleton, a cushion material that can elastically support an occupant by forming a seat outer shape, and a plurality of linear support members.
In the present invention, the back side of the cushion material different from the seating side is covered with a backing material that is inferior in elasticity to the cushion material. Next, the plurality of support members are attached to the frame member while being arranged in parallel in the seat width direction, and the cushion material is supported. And the pressing force (occupant load) received by the cushion material is offset as much as possible by the repulsive force of the raised part (shrinking force of the backing material), but with this type of seat configuration, the cushion material support performance can be further improved. Is desirable.

Therefore, in the present invention, the back surface side of the cushion material is partitioned into a plurality of raised portions by a plurality of support members , and each raised portion is sandwiched between adjacent support members when viewed in the seat width direction. Each of the plurality of raised portions has a semi-cylindrical outer shape (an arc, a parabola, a suspended line, etc. in a cross-sectional view) that rises from the back side of the cushion material. The placement site recessed toward the seating side between outer portion of the raised portion adjacent is formed thereto in a state arranged in the form subduction each support member, the support member apex of the semi-cylindrical outer shape is adjacent It is arranged in the middle position.
Further, in the present invention, a plurality of support members (linear) comprises a first support member disposed in the sheet center as viewed in the sheet width direction, and a plurality of other support members disposed on both sides of the first support member Have.
Then, as the plurality of other support members are arranged away from the first support member (as they are arranged on the side of the seat), the configuration is such that they are arranged closer to the seating side of the seat constituent member gradually than the first support member. .

In the present invention, the arrangement positions of the plurality of raised portions (the portions where the shrinkage force of the backing material preferably acts) are stably defined by the plurality of support members arranged in a sinking shape.
Then, as the plurality of other support members are arranged away from the first support member (as they are arranged on the side of the seat), the support members are gradually arranged closer to the seating side of the seat constituent member. For this reason, in this invention, it will be arrange | positioned so that a passenger | crew may be enclosed (wrapped) by approaching a seating side, so that it may arrange | position to the side of a sheet | seat so that it may become a structure (it is excellent in support performance). ).

  According to the first aspect of the present invention, the support performance of the cushion material can be further improved.

It is a perspective view of a vehicle seat. It is a perspective view of a frame member. It is the III-III sectional view taken on the line of FIG.

Hereinafter, embodiments for carrying out the present invention will be described with reference to FIGS. In each figure, a reference symbol F is attached to the front of the vehicle seat, a reference symbol B to the rear of the vehicle seat, a reference symbol UP to the upper side of the vehicle seat, and a reference symbol DW to the lower side of the vehicle seat. In FIG. 3, for convenience, the vehicle seat is illustrated without the skin material.
The vehicle seat 2 in FIG. 1 has a seat cushion 4, a seat back 6, and a headrest 8. These seat components include a frame member (4F, 6F, 8F) forming a seat skeleton, a cushion material (4P, 6P, 8P) forming a seat outer shape, and a skin material (4S, 6S, 8S) covering the cushion material. Have

[Seat cushion]
The seat cushion 4 has the above-described configuration (4F, 4P, 4S) and a plurality of support members (11f, 11s, 11t, etc.) (see FIGS. 1 and 2).
In the present embodiment, the plurality of support members 11f to 11t are attached to the frame member 4F. Next, the cushion material 4P is covered with the skin material 4S while the cushion material 4P is supported by the plurality of support members 11f to 11t.
The occupant X is supported by the repulsive force of the cushion material 4P (the shrinkage force of the backing material 50 described later). In this type of seat configuration, it is desirable that the support performance of the cushion material 4P can be further improved (see FIG. 3). reference).
Therefore, in this embodiment, the support performance of the cushion material 4P is further improved with the configuration described later. Hereinafter, each configuration will be described in detail.

(Frame member)
The frame member 4F is a substantially rectangular frame (upward view), and includes a front frame 4a, a pair of side frames 4b, and a rear frame 4c (see FIG. 2).
The front frame 4 a is a member (square member shape) that constitutes the front portion of the seat cushion 4. The pair of side frames 4b are members (square members) that constitute the side portions of the seat cushion 4, respectively. The rear frame 4c is a member (square member shape) that constitutes the rear portion of the frame member 4F.

(Support member)
The first support member 11f and the other support members (second support member 11s, third support member 11t) are both linear members, and have a locking portion 14 and a support portion 16 (FIGS. 2 and 2). 3).
The material of each support member is not particularly limited as long as it can support the occupant X, but a material (metal, resin, or the like) that can be bent and deformed by pressing from the seating side (load of the occupant X) is preferable.
And the latching | locking part 14 is a linear site | part of each support member both ends, and can be attached on the frame member 4F.
Moreover, the support part 16 is a recessed part provided in the middle of each support member, and can protrude toward the one side (sheet back side) of each support member. And the passenger | crew load concerning the cushion material 4P can be received by arrange | positioning the support part 16 in contact with the back surface of the cushion material 4P.

In the present embodiment, the plurality of support members 11f to 11t are extended in the front-rear direction of the seat cushion 4 (see FIGS. 2 and 3).
At this time, the first support member 11f is disposed at the center of the seat cushion 4. A plurality of other support members (a pair of second support members 11s and a pair of third support members 11t) are arranged symmetrically on both sides of the first support member 11f. The pair of second support members 11s are respectively disposed adjacent to the first support member 11f (arranged on both sides), and the pair of third support members 11t are disposed between the second support member 11s and the side frame, respectively. .
And while making the center (support part 16) of each support member 11f-11t protrude to a sheet | seat back side, both ends (locking part 14) of each support member 11f-11t are each fixed to the front frame 4a and the back frame 4c.
The separation dimension (clearance in the sheet width direction) between the support members 11f to 11t is not particularly limited. For example, in this embodiment, the plurality of support members 11f to 11t are arranged at equal intervals in the sheet width direction.

In this embodiment, the other support members (second support member 11s, third support member 11t) are gradually arranged closer to the seating side of the seat cushion 4 as they are spaced apart from the first support member 11f (see FIG. 2 and FIG. 3).
In the present embodiment, the first support member 11f (support portion 16) is disposed farthest from the seating side (a seating portion 14a described later) of the seat cushion 4 (separation dimension: L1). A pair of second support members 11s (support portions 16) are arranged closer to the seating side than the first support member 11f (separation dimensions: L2, L2 <L1). The pair of third support members 11t (support portions 16) are arranged closest to the seating side (separation dimensions: L3, L3 <L2).

In this embodiment, the plurality of support members 11f to 11t can be stabilized by attaching the auxiliary support members 12f and 12s to the frame member 4F (see FIG. 2).
For example, the pair of auxiliary support members 12f and 12s are arranged in a crossing manner on the plurality of support members 11f to 11t while extending in the width direction of the seat cushion 4.
At this time, the first auxiliary support member 12f is disposed below the plurality of support members 11f to 11t while being disposed in front of the seat. The second auxiliary support member 12s is disposed below the plurality of support members 11f to 11t while being disposed at the center of the seat. Then, both ends (locking portions 14) of the auxiliary support members 12f and 12s are fixed to the side frames 4b, respectively, and the second auxiliary support member 12s (support portion 16) is protruded to the back side of the seat.

(Cushion material)
The cushion material 4P is a member (substantially rectangular shape) that forms a seat outer shape, and can elastically support the occupant X (see FIGS. 1 and 3). Although the material of the cushion material 4P is not particularly limited, a resin member such as polyurethane foam can be exemplified.
The cushion material 4P of the present embodiment has a seating portion 14a, a support portion 14b, a plurality of raised portions 21, 22, 23, a plurality of arrangement portions 41, 42, 43, and a backing material 50.
The seating part 14a is a part (flat) at the center of the upper surface of the cushion material 4P, and the support part 14b is a projecting part on the side of the seating part 14a. Further, the plurality of raised portions 21, 22, 23 are portions raised from the back surface side of the cushion material 4P.
In the present embodiment, the back surface shape (in cross-sectional view) of the cushion material forms a convex arc shape below the seat. And the back surface side of the cushioning material 4P is partitioned into a plurality of raised portions 21, 22, 23 by a plurality of support members 11f to 11t.

(Multiple ridges)
The plurality of raised portions (the first raised portion 21, the second raised portion 22, and the third raised portion 23) are arranged between the adjacent support members 11f to 11t (see FIG. 3).
In the present embodiment, the pair of first raised portions 21 extends between the first support member 11f and the second support member 11s in the front-rear direction of the seat, and is disposed immediately below the occupant hip (preferably the sciatic nodule). .
And a pair of 1st protruding site | parts 21 can receive the passenger | crew load at the time of normal driving | operating by arrange | positioning directly under a passenger | crew's buttocks (preferably ischial nodule).
Further, the pair of second raised portions 22 are extended between the second support member 11s and the third support member 11t before and after the seat. Further, a pair of third raised portions 23 are extended between the third support member 11t and the side frame 4b in the front and rear of the seat.
The pair of second raised portions 22 and the pair of third raised portions 23 are disposed on the side of the seat cushion 4 when viewed in the seat width direction, so that the occupant load during cornering operation can be received.

(Outer shape of raised part)
Each of the plurality of raised portions 21 to 23 has an outer shape of a semi-cylindrical shape having the same shape and the same size (an arc, a parabola, a catenary line, etc. in a sectional view), and is raised from the back surface side of the cushion material 4P (see FIG. 3).
The outer shape of the first raised portion 21 is an arc shape (in cross-sectional view) with the middle between the first support member 11f and the second support member 11s as a vertex when viewed in the sheet width direction. The first raised portion 21 is curved in a convex shape with the arrangement positions of the first support member 11f and the second support member 11s (the first arrangement section 41 and the second arrangement section 42 described later) as the base ends.
Further, the outer shape of the second raised portion 22 is an arc shape (sectional view) having an intermediate position between the second support member 11s and the third support member 11t as a vertex when viewed in the sheet width direction. And the external shape of the 3rd protruding part 23 is circular arc shape (sectional view) centering on the intermediate position of the 3rd supporting member 11t and a side frame seeing in the sheet | seat width direction.

(Location)
The plurality of arrangement parts (first arrangement part 41 to third arrangement part 43) are parts recessed toward the seating side (seat portion 14a) of the seat cushion 4, and the corresponding support members 11f to 11t are depressed. It can be arranged (see FIG. 3).
The first arrangement part 41 is a part where the first support member 11 f can be arranged, and can be formed between the pair of first raised parts 21. Further, the second arrangement part 42 is a part where the second support member 11 s can be arranged, and can be formed between the first raised part 21 and the second raised part 22. And the 3rd arrangement part 43 is a part which can arrange the 3rd supporting member 11t, and can be formed between the 2nd bulge part 22 and the 3rd bulge part 23.

In the present embodiment, the first arrangement portion 41 is formed by the outer shape portions (both convex shapes) of the pair of first raised portions 21. The first arrangement portion 41 extends in the front-rear direction of the seat between the pair of first raised portions 21 and is arranged to face the first support member 11f. And the 1st support member 11f can be arrange | positioned in the 1st arrangement | positioning part 41 in the submerged shape because the external part of a pair of 1st protrusion part 21 protrudes on both sides of the 1st arrangement | positioning part 41.
Moreover, the 2nd arrangement | positioning site | part 42 is formed in the external shape part (convex surface shape) of the 1st protruding site | part 21, and the external shape part (convex surface shape) of the 2nd protruding part 22. FIG. And the 2nd supporting member 11s can be arrange | positioned in the 2nd arrangement | positioning part 42 in sinking shape because the external shape part of the adjacent protruding part 21 and 22 protrudes on both sides of the 2nd arrangement | positioning part 42. FIG.
And the 3rd arrangement | positioning site | part 43 is formed in the external shape part (convex shape) of the 2nd protruding part 22, and the external shape part (convex shape) of the 3rd protruding part 23. FIG. And the third support member 11t can be arrange | positioned in the 3rd arrangement | positioning part 43 so that the external shape part of the adjacent protruding parts 22 and 23 protrudes on both sides of the 3rd arrangement | positioning part 43. FIG.

In the present embodiment, the auxiliary support members 12f and 12s can be arranged by forming another arrangement portion (not shown) across the cushion material 4P in the seat width direction.
For example, the plurality of raised portions 21 to 23 are divided into the front and back of the sheet by the second auxiliary support member 12s. And the 2nd auxiliary | assistant support member 12s can be arrange | positioned by sinking because the front part side of each protruding part 21-23 and the rear part side of each protruding part 21-23 protrude on both sides of another arrangement | positioning part.

(Backing material)
The backing material 50 is a planar member that is inferior to the cushioning material 4P (not easily stretched) (see FIG. 3).
Examples of the backing material 50 include fabric (woven fabric, knitted fabric, nonwoven fabric), leather, and resin layer. Among these, a spunbonded nonwoven fabric (for example, trade name Tafnel (registered trademark) manufactured by Mitsui Chemicals, Inc.) can be suitably used as the backing material 50.
In the present embodiment, the back surface side of the cushion material 4P is covered with the backing material 50. Then, as will be described later, when the cushioning material 4P is deformed, the backing material 50 contracts and returns to its original state, thereby generating a repulsive force of the cushioning material 4P (see the arrow R1 in FIGS. 3 and 4). reference).

Here, the arrangement method of the backing material 50 is not particularly limited. The backing material 50 can be attached to the back surface of the cushion material 4P (after molding), and the backing material 50 can also be attached when the cushion material 4P is molded.
For example, when the cushion material 4P is molded, the backing material 50 (cloth or the like) is disposed in the cavity of the molding die. At this time, it is desirable to stretch the backing material 50 in a shape that follows the back surface shape (protrusion shape) of the cushion material 4P.
Then, a backing material 50 is attached while molding the cushion material 4P by pouring a molding material (such as molten resin) into the molding die. At this time, the molten resin enters and solidifies (impregnates) the backing material 50 (between the fibers), so that the backing material 50 is integrated with the back surface of the cushion material 4P.

[Cushion material arrangement]
2 and 3, the cushion material 4P is supported on the plurality of support members 11f to 11t while being disposed on the frame member 4F.
In the present embodiment, the support portions 16 of the corresponding support members 11f to 11t are respectively placed in the plurality of placement portions 41 to 43 in a sinking manner. Thus, by arranging the plurality of support members 11f to 11t in a sinking manner, the arrangement positions of the plurality of raised portions 21 to 23 can be stably defined.
And the some protruding part 21-23 is arrange | positioned between the corresponding support members 11f-11t, respectively. At this time, a pair of second raised parts 22 and a pair of third raised parts 23 are disposed around (side) the pair of first raised parts 21 while arranging the pair of first raised parts 21 directly below the occupant butt. Place.
Further, in the present embodiment, as the second support member 11s and the third support member 11t are disposed away from the first support member 11f (as they are disposed on the side of the seat), the seat support 4 gradually approaches the seating side. Deploy. Therefore, in this embodiment, the plurality of raised portions 21 to 23 are arranged so as to surround the occupant X by being closer to the seating side (sitting portion 14a) as they are arranged on the side of the seat.

[Cushion material support performance]
In the above-described seat configuration, there is a concern that the cushion material 4P (first raised portion 21) may be crushed and deformed by the pressing force of the occupant X during normal operation or the like (see FIG. 3).
In the present embodiment, when the pressing force (occupant load) is applied to the cushion material 4P, the backing material 50 is extended while the first raised portion 21 is crushed and deformed. At this time, when the backing material 50 shrinks and returns to its original state (due to the shrinking force of the backing material 50), the first raised portion 21 tries to return to its original shape, thereby repelling force (in the direction of pushing up the occupant X). Force) (see arrow R1 in FIG. 3).
For this reason, in this embodiment, the pressing force received by the cushion material 4P during normal operation or the like can be offset as much as possible by the repulsive force of the first raised portion 21. Furthermore, in the present embodiment, the occupant X can be stably supported by arranging the plurality of raised portions 21 to 23 so as to surround (enclose) the occupant X.

Further, in the above-described seat configuration, when a load movement of the occupant X occurs during cornering traveling or the like, a pressing force may act on the cushion material 4P (second raised portion 22 or third raised portion 23).
At this time, in this embodiment, when the pressing force is applied to the cushion material 4P (the second raised portion 22 or the third raised portion 23), the backing material 50 is extended while the raised portions 22 and 23 are crushed and deformed. At this time, a repulsive force is generated in the second raised portion 22 or the third raised portion 23 due to the contraction force of the backing material 50 (see arrow R1 in FIG. 3).
For this reason, in this embodiment, the pressing force received by the cushion material 4P during cornering traveling or the like can be offset as much as possible by the repulsive force of the second raised portion 22 or the third raised portion 23.

As described above, in the present embodiment, the plurality of raised portions 21 to 23 (the portion on which the shrinkage force of the backing material preferably acts) is stably defined by the plurality of support members 11f to 11t.
At this time, the plurality of raised portions 21 to 23 can be disposed so as to surround (enclose) the occupant X by being closer to the seating side (sitting portion 14 a) as being disposed on the side of the seat. And according to the driving | running condition, the crushing deformation | transformation of the cushioning material 4P can be prevented or reduced by the repulsive force of the some protruding parts 21-23.
Therefore, according to the present embodiment, the support performance of the cushion material 4P can be further improved by the plurality of raised portions 21 to 23.

The vehicle seat of the present embodiment is not limited to the above-described embodiment, and can take other various embodiments.
(1) In this embodiment, although the example which arrange | positions several support member 11f-11t in the vehicle seat 2 was demonstrated, it is not the meaning which limits the arrangement | positioning number of a 1st support member. For example, a plurality of first support members can be provided. And according to the number of arrangement | positioning of a some support member, a some protruding part and arrangement | positioning part can be formed.
The plurality of support members may be attached to the frame member in a non-detachable manner or may be attached in a removable manner.
(2) In the present embodiment, the example in which the auxiliary support members 12f and 12s are disposed on the vehicle seat 2 has been described. However, the present invention is not intended to limit the number of other support members disposed. Moreover, although the example which arrange | positions auxiliary | assistant support member 12f, 12s in the vehicle seat 2 was demonstrated in the present Example, an auxiliary | assistant support member can also be abbreviate | omitted.
In addition, the auxiliary support member may be attached to the side frame (side frame) in a non-detachable manner or may be attached in a removable manner. Similarly, the auxiliary support member may be detachably attached to the plurality of support members, or may be detachably attached.
(3) In the present embodiment, the configuration of the present embodiment has been described by exemplifying the seat cushion 4, but the configuration of the present embodiment can be applied to various seat configurations such as the seat back 6.

2 Vehicle seat 4 Seat cushion 6 Seat back 8 Headrest 11f First support member 11s Second support member 11t Third support member 12f, 12s Auxiliary support member 14 Locking portion 16 Support portion 21 First raised portion 22 Second raised portion 23 3rd protruding part 41 1st arrangement part 42 2nd arrangement part 43 3rd arrangement part 50 Backing material

Claims (1)

A seat component such as a seat cushion or a seat back is provided, and the seat component includes a frame member that forms a seat skeleton, a cushion material that elastically supports an occupant by forming a seat outer shape, and a plurality of linear members A support member,
The back surface side of the cushion material different from the seating side is covered with a backing material that is inferior in elasticity to the cushion material, and the plurality of support members are attached to the frame member while being arranged in parallel in the seat width direction. In the vehicle seat configured to support the cushion material,
The back side of the cushion material is partitioned into a plurality of raised portions by the plurality of support members, and each raised portion is sandwiched between adjacent support members when viewed in the seat width direction,
Wherein the plurality of raised portions are each and having a semi-cylindrical outer shape raised from the back side of the cushion member, disposed portion recessed toward the front Symbol seated side between the outer portion of the raised portion where the adjacent In the state where each support member is formed in a sinking shape, the apex of the semi-cylindrical outer shape is disposed at an intermediate position between the adjacent support members,
The plurality of support members include a first support member disposed in the center of the sheet when viewed in the sheet width direction, and a plurality of other support members respectively disposed on both sides of the first support member. As the support member is spaced apart from the first support member, the vehicle seat is disposed closer to the seating side of the seat constituent member than the first support member.

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