JP5614042B2 - Vehicle seat - Google Patents

Description

  The present invention relates to a vehicle seat in which a net-like planar elastic body is stretched between a pair of left and right side frames, and a seating surface portion is formed of the planar elastic body.

  Conventionally, in the above vehicle seat, as disclosed in Patent Document 1, the pair of left and right side frames of the seat cushion are formed in a crank plate shape that is long in the vertical direction in the longitudinal section, and the width of the planar elastic body The engaging member connected to the end portion in the direction is engaged with the upper end portion of the side frame from the inner side in the width direction of the seat cushion, and tension is applied to the planar elastic body.

JP 2002-172049 A

According to the conventional structure described above, the tension of the planar elastic body is applied to the upper end of the side frame from the direction perpendicular to the side frame in the longitudinal section, so that the side frame is cut off so that the side frame does not fall down and deform due to the tension. The area had to be increased, and for this reason, the freedom of layout of the side frame was taken.
Further, when the cross-sectional area of the side frame is increased, the side frame approaches the seated person (occupant), so that the sitting comfort is reduced.
The present invention has been made in view of the above-described actual condition, and the object thereof is to form a seat surface portion with a net-like planar elastic body stretched between a pair of left and right side frames. The object is to provide a vehicle seat that can increase the degree of freedom of the layout of the side frame and improve the comfort of sitting while having the structure.

The feature of the present invention is that
A vehicular seat in which a net-like planar elastic body is stretched between a pair of left and right side frames, and a seating surface portion is formed of the planar elastic body,
An auxiliary side frame provided in the side frame is interposed between the side frame and the planar elastic body,
The end of the planar elastic body is bent from the auxiliary side frame side to the outer surface side of the side frame and fixed to the outer surface of the side frame,
The auxiliary side frame is inclined so as to be positioned on the outer side in the seat width direction toward the planar elastic body side when viewed from the longitudinal direction of the side frame ,
The auxiliary side frame is divided into a plurality of divided auxiliary side frames in the longitudinal direction of the seat,
The front end portion and the rear end portion of the front auxiliary auxiliary side frame are welded and joined to the surfaces of the side frame having different directions . (Claim 1)

According to this configuration, as shown in FIG. 2 as an example, the auxiliary side frame 20 interposed between the side frame 21 and the planar elastic body 10 is on the side of the planar elastic body 10 when viewed from the longitudinal direction of the side frame 21. The end of the sheet-like elastic body 10 is bent from the auxiliary side frame 20 side to the outer side surface 21S side of the side frame 21 and is fixed to the outer side surface 21S. The force F from the planar elastic body 10 is applied to the auxiliary side frame 20 along a direction inclined so as to be positioned on the outer side W2 in the seat width direction as viewed from the longitudinal direction of the side frame 21. .
As a result, the auxiliary side frame can be configured to be strong against the force from the planar elastic body, and the auxiliary side frame can hardly fall down and be deformed, and the cross-sectional area of the auxiliary side frame can be reduced.
In this way, by extending the planar elastic body to the auxiliary side frame having a reduced cross-sectional area and fixing the end of the planar elastic body to the outer side surface of the side frame, the auxiliary side on the both end sides of the seating surface portion The pressure on the planar elastic body from the frame can be increased, and a high tension can be applied to the seating surface portion to give a firm sitting comfort.
And, it is possible to reduce the cross-sectional area of the auxiliary side frame, and the auxiliary side frame is inclined so as to be positioned on the outer side in the seat width direction as viewed from the longitudinal direction of the side frame, Since the end of the planar elastic body is fixed to the outer surface of the side frame, the fixed portion of the end of the planar elastic body to the side frame is located away from the occupant, and the side frame layout space And the degree of freedom of the shape and arrangement of the side frame can be increased. (Claim 1)

In the present invention,
The front split auxiliary side frame and the rear split auxiliary side frame are formed of a bent pipe material,
Between the front and rear end portions of the front side split auxiliary side frame is separated from the side frame, and the planar elastic body is wound between the front and rear end portions of the front side split auxiliary side frame,
The front end portion and the rear end portion of the rear side division auxiliary side frame are welded to the side frame, and the front and rear end portions of the rear side division auxiliary side frame are separated from the side frame, When the planar elastic body is wound between the front and rear end portions of the split auxiliary side frame , the following action can be achieved. (Claim 2)

  The structure of the auxiliary side frame can be simplified, the auxiliary side frame can be easily joined to the side frame, and the manufacturing cost required for the auxiliary side frame can be reduced. (Claim 2)

In the present invention,
The front division auxiliary side frame is positioned on the outer side in the seat width direction than the rear division auxiliary side frame, and the front side is located on the outer side in the seat width direction.
The rear side division auxiliary side frame may be configured to have a smaller diameter than the front side division auxiliary side frame. (Claim 3)
In the present invention,
When the plurality of division assist side frames are covered with a single resin cover, the following effects can be obtained. (Claim 4 )

The surface of the resin cover around which the planar elastic body is wound is formed gently, the auxiliary side frame is covered with a single resin cover, and the planar elastic body is received by the gently formed surface, thereby forming a planar shape. The tension of the elastic body can be easily made uniform.
Thereby, sitting comfort can be improved, stress can be avoided from being concentrated on a part of the planar elastic body, and durability of the planar elastic body can be improved. In addition, the planar elastic body does not directly touch the weld bead, rust, etc. of the pipe member, and it is possible to avoid the tearing of the planar elastic body and the generation of abnormal noise. (Claim 4 )

In the present invention,
From the front side of the side of the planar elastic body on the inner side in the seat width direction than the auxiliary side frame, the cushion pad forming the side support portion is raised, and the cushion pad wraps around the outer surface side of the side frame,
When the planar elastic body is interposed between the outer side surface of the side frame and the cushion pad that wraps around the outer surface side of the side frame, the following effects can be achieved. (Claim 5 )

Slip between the cushion pad and the side frame is suppressed, and generation of rubbing noise can be suppressed. Further, it is possible to avoid the cushion pad from coming into direct contact with the auxiliary side frame and prevent the generation of abnormal noise. (Claim 5 )

According to the present invention,
While the structure is such that a net-like planar elastic body is stretched between a pair of left and right side frames and a seating surface portion is formed by the planar elastic body, the degree of freedom of layout of the side frame can be increased. Thus, a vehicle seat that can improve the sitting comfort can be provided.

Perspective view of vehicle seat AA sectional view of FIG. 1 and an enlarged sectional view of the main part Perspective view of seat frame of seat cushion The perspective view of the seat frame of the seat cushion of another embodiment

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 and 2 show a vehicle seat 100. The vehicle seat 100 is connected to the seat cushion 1 that supports the lower limbs of the seated person, the seat back 2 that stands up from the rear end part of the seat cushion 1 and supports the upper body of the seated person, and the upper end part of the seat back 2. And a headrest 3 for supporting the head of the seated person.

[Structure of seat cushion 1]
As shown in FIGS. 1 and 2, a coarse net-like planar elastic body 10 in which the lower back side can be seen through from above is stretched between a pair of left and right side frames 21 of a seat frame 35 to form a planar shape. A seating surface portion of the rear half of the seat cushion 1 is formed by the elastic body 10. The seat surface portion of the front half of the seat cushion 1 is formed by covering the cushion pad with the skin material 7. Side support portions 8 are formed on both sides of the seat cushion 1 so as to hold a seated occupant (occupant) in the left-right direction.

  As shown in FIG. 3, the seat frame 35 includes a pair of left and right side frames 21, a plate-like front horizontal frame 23 that connects front ends of the pair of left and right side frames 21, and a pair of left and right side frames 21. And a round pipe-shaped rear side horizontal frame 25 that connects the rear ends of the two. A slide rail 60 comprising a lower rail 22 and an upper rail 36 is interposed between the side frame 21 and the floor panel, and the side frame 21 is supported on the floor panel so as to be slidable in the front-rear direction via the slide rail 60. Yes.

  As shown in FIG. 2, the side frame 21 includes flanges 21 </ b> F projecting on the inner side W <b> 1 in the seat width direction at both upper and lower ends, and a bead 21 </ b> V bulging on the inner side W <b> 1 in the seat width direction. The tip of the upper flange 21F is bent downward. Thereby, the rigidity of the side frame 21 is improved. The side frame 21 is formed by pressing a metal plate.

  The planar elastic body 10 is stretched over a pair of left and right side frames 21 to be tensioned. Since the seating surface portion is formed of the planar elastic body 10, the seating surface portion can be provided with novel cushioning properties, breathability, and appearance. Furthermore, the pad and spring which comprise a seat surface part can be omitted, the seat back 2 can be reduced in weight, and a seat surface part can be made thin and space efficiency can be improved.

  As shown in FIG. 2, an auxiliary side frame 20 provided on the side frame 21 is interposed between the side frame 21 and the planar elastic body 10, and an end portion of the planar elastic body 10 extends from the auxiliary side frame 20 side. The side frame 21 is fixed to the outer surface 21S of the side frame 21 by being bent at a substantially right angle (may be a right angle) on the outer surface 21S side. A plurality of hooks 29 are welded to the lower end portion of the outer side surface 21S of the side frame 21, and the locking portion 19 connected to the end portion of the planar elastic body 10 is locked to the hook 29 from below. Thus, as described above, the end portion of the planar elastic body 10 is fixed to the outer surface 21 </ b> S of the side frame 21. The locking portion 19 is sewn to the end portion of the planar elastic body 10. A symbol L in FIG. 2 is a sewing line between the locking portion 19 and the end portion of the planar elastic body 10.

  The auxiliary side frame 20 is about 45 degrees with respect to the horizontal direction so that the sheet elastic body 10 side (upper side) is located on the outer side W2 in the seat width direction when viewed from the longitudinal direction of the side frame 21 (front and rear direction of the seat). The upper half portion of the auxiliary side frame 20 protrudes outward in the seat width direction W2 from the outer surface 21S of the side frame 21 (the inclination angle of the auxiliary side frame 20 is not limited to this value).

  Further, a seat cushion pad 9 (corresponding to a cushion pad) forming the side support portion 8 is raised from the front side of the side elastic body 10 on the inner side W1 of the auxiliary side frame 20 in the seat width direction, and the seat cushion pad. 9 wraps around the outer surface 21 </ b> S side of the side frame 21. The seat cushion pad 9 is formed of a soft polyurethane foam and has an L-shaped cross section.

  The sheet-like elastic body 10 is interposed between the outer surface 21S of the side frame 21 and the seat cushion pad 9 that wraps around the outer surface 21S of the side frame 21 so that the seat cushion pad 9 is attached to the side frame 21. This prevents contact with the outer surface 21S directly.

  Thereby, the slip of the seat cushion pad 9 and the side frame 21 is suppressed, and generation | occurrence | production of a rubbing sound can be suppressed. Moreover, it can avoid that the seat cushion pad 9 contacts the auxiliary | assistant side frame 20 directly, and generation | occurrence | production of abnormal noise can be prevented. The seat cushion pad 9 is covered with a skin material 7, and the end of the skin material 7 is fixed to the lower surface of the side frame 21 from below.

  As shown in FIG. 3, the auxiliary side frame 20 is divided into a plurality of divided auxiliary side frames 30 and 40 in the longitudinal direction of the side frame 21 (the front-rear direction of the seat), and in this embodiment, the front divided auxiliary side is divided. The frame 30 and the rear dividing auxiliary side frame 40 are divided into two. Both split auxiliary side frames 30 and 40 are formed of a bent pipe material, and the front split auxiliary side frame 30 is longer than the rear split auxiliary side frame 40 and is formed of a large-diameter pipe member. .

The front end portion 30A and the rear end portion 30B (corresponding to both end portions in the longitudinal direction) of the front side division auxiliary side frame 30 are welded to the side frame 21, and between the front and rear end portions 30A, 30B (between both end portions in the longitudinal direction). Is separated from the side frame 21, and the planar elastic body 10 is wound between the front and rear end portions 30A, 30B.
Similarly, the front end portion 40A and the rear end portion 40B (corresponding to both end portions in the longitudinal direction) of the rear dividing auxiliary side frame 40 are welded to the side frame 21, and the front and rear end portions 40A, 40B (both ends in the longitudinal direction) are joined. The sheet-like elastic body 10 is wound around the front and rear end portions 40A and 40B while being spaced apart from the side frame 21.

  The front end portion 30A of the front split auxiliary side frame 30 is bent to the inner side W1 in the seat width direction and welded to the upper surface of the upper flange 21F of the front end portion of the side frame 21, so that the front split auxiliary side frame 30 The rear end portion 30B is welded to the outer side surface 21S of the intermediate portion in the front-rear direction of the side frame 21. Since the front end portion 30A and the rear end portion 30B are welded and joined to differently oriented surfaces (surfaces orthogonal to each other) instead of the same orientation, the side frames of the front auxiliary auxiliary side frame 30 are separated. The bonding strength with respect to 21 can be increased.

  Between the front and rear end portions 30A and 30B of the front split auxiliary side frame 30 (that is, the split auxiliary side frame portion 30C between the front and rear end portions 30A and 30B) is bent in a mountain shape, and the front frame is inclined upward. 30C1, a rear frame portion 30C2 that is inclined forwardly upward, and an intermediate frame portion 30C3 that extends in the front-rear direction and connects the front frame portion 30C1 and the rear frame portion 30C2.

  The rear split auxiliary side frame 40 is formed in a J shape with a front end portion 40A bent downward. The front end portion 40A is welded to the upper surface of the upper flange 21F of the side frame 21, and the rear end portion 40B is welded to the upper surface of the upper flange 21F of the side frame 21. The rear end portion 40B is bent in a step shape. Further, the front and rear end portions 40A and 40B of the rear division auxiliary side frame 40 (that is, the division auxiliary side frame portion between the front and rear end portions 40A and 40B) are along the front and rear direction.

According to the above configuration,
The auxiliary side frame 20 (the front side division auxiliary side frame 30 and the rear side division auxiliary side frame 40) is positioned on the outer side W <b> 2 in the seat width direction as viewed from the longitudinal direction of the side frame 21. Inclined, the end of the planar elastic body 10 is bent from the auxiliary side frame 20 side to the outer side surface 21S side of the side frame 21 and fixed to the outer side surface 21S of the side frame 21, so as shown in FIG. A force F from the planar elastic body 10 is applied to the auxiliary side frame 20 along a direction inclined so as to be positioned on the outer side W2 in the seat width direction as viewed from the longitudinal direction of the side frame 21 toward the planar elastic body 10 side. Reference signs F1 and F2 are component forces of the force F.

As a result, the auxiliary side frame 20 can be configured to be strong against the force from the planar elastic body 10, and the auxiliary side frame 20 is unlikely to fall down and deform, and the cross-sectional area of the auxiliary side frame 20 is reduced. be able to.
In this way, the planar elastic body 10 is stretched over the auxiliary side frame 20 having a reduced cross-sectional area, and the end portions of the planar elastic body 10 are fixed to the outer side surface 21S of the side frame 21, whereby both end portions of the seat surface portion. The pressure on the planar elastic body 10 from the auxiliary side frame 20 on the side can be increased, and a high sitting tension can be given to the seat surface portion to give a firm sitting comfort.

  Further, the auxiliary side frame 20 can be reduced in cross-sectional area, and the auxiliary side frame 20 is inclined so that the side elastic body 10 side is located on the outer side W2 in the seat width direction when viewed from the longitudinal direction of the side frame 21. And the end portion of the planar elastic body 10 is fixed to the outer surface 21S of the side frame 21, so that the fixed portion of the end portion of the planar elastic body 10 to the side frame 21 is removed from the occupant. It is located away from each other, so that the space for the layout of the side frame 21 can be afforded, and the degree of freedom of the shape and arrangement of the side frame 21 can be increased.

  Since the front split auxiliary side frame 30 is formed of a thicker pipe member having a larger diameter than the rear split auxiliary side frame 40, a large bending moment can be applied to the front split auxiliary side frame 30.

  The front-side division auxiliary side frame 30 is located on the outer side W2 in the seat width direction than the rear-side division auxiliary side frame 40, and the front side is located on the outer side W2 in the sheet width direction. Even if the side support part 8 is gradually separated from the thigh of the occupant as it becomes the front side, there is no problem, and even if the front auxiliary dividing side frame 30 below the side support part 8 is formed of a thick pipe member, Since it can arrange | position away from a passenger | crew, there is no possibility of reducing a seating comfort.

  On the other hand, the rear split auxiliary side frame 40 is made smaller in diameter than the front split auxiliary side frame 30 so that the rear split auxiliary side frame 40 is laid out in a narrow space between the occupant and the seat reclining mechanism. Is possible. Further, since the load applied at the time of getting on and off is small at the place where the rear side division auxiliary side frame 40 is arranged, there is a problem in strength even if the rear side division auxiliary side frame 40 has a smaller diameter than the front side division auxiliary side frame 30. Is unlikely to occur.

  As described above, by dividing the auxiliary side frame 20 into a plurality of parts, the structure of the present invention can be applied to a seat having a complicated shape such as a sports seat.

[Another embodiment]
(1) The auxiliary side frame 20 may not be divided into a plurality of parts.
That is, the auxiliary side frame 20 is formed of a single bent pipe material, both end portions in the longitudinal direction of the auxiliary side frame 20 are welded to the side frame 21, and the distance between both end portions in the longitudinal direction of the auxiliary side frame 20 is between The planar elastic body 10 may be wound between both end portions of the auxiliary side frame 20 in the longitudinal direction so as to be separated from the side frame 21.

(2) As shown in FIG. 4, the plurality of division assist side frames 30, 40 may be collectively covered with a single resin cover 50.
The resin cover 50 includes a side wall 50S having a lower end fixed to the side frame 20 in a state positioned on the inner side W1 of the plurality of auxiliary auxiliary side frames 30 and 40, and an outer side in the seat width direction from the upper end of the side wall 50S. It has a U-shaped upper wall 50J that is bent in W2 and covers the front side division auxiliary side frame 30 and the rear side division auxiliary side frame 40 from the upper side and both sides in the width direction.
The side wall 50S is formed in a gentle triangular shape when viewed from the sheet width direction. The apex of the side wall 50S is located in the vicinity of the connection portion between the front frame portion 30C1 and the intermediate frame portion 30C3 of the front division auxiliary side frame 30. The upper surface of the upper wall 50J around which the planar elastic body 10 is wound is formed into a gentle surface.
By covering the plurality of divided auxiliary side frames 30 and 40 together with a single resin cover 50, the planar elastic body 10 is received by the gentle upper surface of the upper wall 50J of the resin cover 50, and the planar elastic body 10 The tension can be made uniform easily.
Thereby, sitting comfort can be improved, stress can be prevented from concentrating on a part of the planar elastic body 10, and durability of the planar elastic body 10 can be improved. Moreover, the planar elastic body 10 does not directly touch the weld bead, rust, etc. of the pipe member, and it is possible to avoid the tearing of the planar elastic body 10 and the generation of abnormal noise.
The surface of the resin cover 50 may be textured to more reliably suppress the generation of abnormal noise.
(3) The auxiliary side frame 20 of (1) that is not divided into a plurality of parts may be covered with a single resin cover 50. In this case, the surface of the resin cover 50 around which the planar elastic body 10 is wound is formed gently, the auxiliary side frame 20 is covered with a single resin cover 50, and the surface of the gently formed surface is elastic. By receiving the body 10, the tension of the planar elastic body 10 can be easily made uniform.
Thereby, sitting comfort can be improved, stress can be prevented from concentrating on a part of the planar elastic body 10, and durability of the planar elastic body 10 can be improved. In addition, the planar elastic body 10 does not directly touch the weld bead, rust, etc. of the pipe member, and it is possible to avoid the tearing of the planar elastic body 10 and the generation of abnormal noise. Also in this embodiment, the surface of the resin cover 50 may be subjected to a graining process to more reliably suppress the generation of abnormal noise.

(4) In the above embodiment, the seat cushion 1 of the vehicle seat has been described as an example, but the present invention can also be applied to the seat back 2.
That is, an auxiliary side frame (not shown) provided on the side frame is interposed between the side frame (not shown) of the seat back 2 and the planar elastic body 10.
The end of the planar elastic body 10 is bent from the auxiliary side frame side to the outer surface side of the side frame and fixed to the outer surface of the side frame,
The auxiliary side frame may be inclined so as to be positioned on the outer side W2 in the seat width direction as viewed from the longitudinal direction (vertical direction) of the side frame toward the planar elastic body 10 side (front side).
As shown in FIG. 1, a side support portion 48 is also provided on the seat back 2.

8 Side support 9 Cushion pad (Seat cushion pad)
DESCRIPTION OF SYMBOLS 10 Planar elastic body 20 Auxiliary side frame 21 Side frame 21S The outer side surface W1 of a side frame W2 sheet width direction inner side W2 Sheet width direction outer side

Claims (5)

A vehicular seat in which a net-like planar elastic body is stretched between a pair of left and right side frames, and a seating surface portion is formed of the planar elastic body,
An auxiliary side frame provided in the side frame is interposed between the side frame and the planar elastic body,
The end of the planar elastic body is bent from the auxiliary side frame side to the outer surface side of the side frame and fixed to the outer surface of the side frame,
The auxiliary side frame is inclined so as to be positioned on the outer side in the seat width direction toward the planar elastic body side when viewed from the longitudinal direction of the side frame ,
The auxiliary side frame is divided into a plurality of divided auxiliary side frames in the longitudinal direction of the seat,
A vehicle seat in which a front end portion and a rear end portion of the front division auxiliary side frame are welded and joined to surfaces of the side frame having different directions . The front split auxiliary side frame and the rear split auxiliary side frame are formed of a bent pipe material,
Between the front and rear end portions of the front side split auxiliary side frame is separated from the side frame, and the planar elastic body is wound between the front and rear end portions of the front side split auxiliary side frame,
The front end portion and the rear end portion of the rear side division auxiliary side frame are welded to the side frame, and the front and rear end portions of the rear side division auxiliary side frame are separated from the side frame, The vehicle seat according to claim 1 , wherein the planar elastic body is wound between front and rear end portions of the split auxiliary side frame .   The front division auxiliary side frame is positioned on the outer side in the seat width direction than the rear division auxiliary side frame, and the front side is located on the outer side in the seat width direction.
  The vehicle seat according to claim 2, wherein the rear division auxiliary side frame has a smaller diameter than the front division auxiliary side frame. The vehicle seat according to claim 1, wherein the plurality of division assist side frames are covered with a single resin cover. From the front side of the side of the planar elastic body on the inner side in the seat width direction than the auxiliary side frame, the cushion pad forming the side support portion is raised, and the cushion pad wraps around the outer surface side of the side frame,
The vehicle according to any one of claims 1 to 4 , wherein the planar elastic body is interposed between an outer surface of the side frame and the cushion pad that wraps around the outer surface of the side frame. Sheet.

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