JP2014100268A - Seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seat capable of improving an appearance quality, reducing a manufacturing cost, and simplifying the structure of a skin member.SOLUTION: A seat comprises a seat cushion 2 and a lifter device 30. The seat cushion 2 includes a seat frame 6, a seat cushion pad 4, and a skin member 5. The lifter device 30 includes a pair of right and left link mechanisms, and a lifter rod 7. The lifter rod 7 is moved up and down by an action of the lifter device 30. The skin member 5 turns downward from a rear end portion of the seat cushion pad 4 to cover the lifter rod 7 therebelow and a lower face of an end portion of a seat rear side Rr of the seat cushion pad 4. In order that the lifter rod 7 positioned at a lowermost portion, a pushing member 8 for pushing the skin member 5 so that the lifter rod 7 at the lowermost portion may not abut the skin member 5 is disposed at a rear end portion 3K of the seat frame 6.

Description

The present invention
Seat cushion,
A lifter device that raises and lowers the seat cushion with respect to a slide rail or a floor to change and adjust the height of the seat surface;
The seat cushion includes a seat frame,
A seat cushion pad supported by the seat frame;
A skin material covering the seat cushion pad,
The lifter device includes a pair of left and right link mechanisms that separately support the left and right side portions of the seat frame, and a lifter rod that interlocks and connects end portions on the seat rear side of the pair of left and right link mechanisms,
The lifter rod is moved up and down by the operation of the lifter device,
The skin material relates to a seat that wraps downward from a rear end portion of the seat cushion pad, covers the lifter rod from below, and covers a lower surface of an end portion on the seat rear side of the seat cushion pad.

Conventionally, as disclosed in Patent Document 1, one end portion of each of the inner skin material and the outer skin material is sewn to the rear end portion of the skin material covering the upper surface of the seat cushion pad.
Then, the inner skin material is passed between the lower surface of the seat cushion pad and the lifter rod, the front end portion of the skin material is fixed to the seat frame, and the outer skin material is wrapped under the lifter rod so that the front edge portion of the skin material is the seat frame. It was fixed.
In this structure, when the lifter rod is positioned on the uppermost side, the outer skin material is loosened, and when the lifter rod is positioned on the lowermost side, the lifter rod comes into contact with the skin material from above and the outer skin material is strained.

JP-A-11-334432

According to the conventional structure described above, the tension of the outer skin material changes as the lifter rod moves up and down. Therefore, there has been a problem that the appearance quality is deteriorated.
In addition, since the inner skin material and the outer skin material that overlap each other are provided at the rear end of the sheet, the amount of the skin material is increased, the cost required for the skin material is increased, and the structure of the skin material is complicated. It was.
An object of the present invention is to provide a sheet that can improve the appearance quality, reduce the manufacturing cost, and simplify the structure of the skin material.

The feature of the present invention is that
Seat cushion,
A lifter device that raises and lowers the seat cushion with respect to a slide rail or a floor to change and adjust the height of the seat surface;
The seat cushion includes a seat frame,
A seat cushion pad supported by the seat frame;
A skin material covering the seat cushion pad,
The lifter device includes a pair of left and right link mechanisms that separately support the left and right side portions of the seat frame, and a lifter rod that interlocks and connects end portions on the seat rear side of the pair of left and right link mechanisms,
The lifter rod is moved up and down by the operation of the lifter device,
The skin material is a seat that wraps downward from the rear end portion of the seat cushion pad, covers the lifter rod from below, and covers the lower surface of the end portion on the seat rear side of the seat cushion pad. ,
A tension member is provided at the rear end portion of the seat frame so as to stretch the skin material from above so that the lowermost lifter rod does not contact the skin material. (Claim 1)

According to said structure, the tension member which stretches the said skin material from upper direction is provided in the rear-end part of the said seat frame so that the said lifter rod located in the lowest side may not contact | abut to the said skin material. Therefore, it is possible to prevent a change in the tension of the skin material that accompanies the raising and lowering of the seat cushion, and it is possible to prevent the skin material from being over-stretched or loosened, thereby maintaining an appropriate tension state of the skin material. As a result, the appearance quality of the sheet can be improved.
Moreover, since only a single skin material is provided at the rear end of the seat cushion, an increase in the amount of the skin material can be avoided, and the cost required for the skin material can be reduced. The structure can be simplified. (Claim 1)

In the present invention,
The tension member is composed of a wire frame,
The wire frame includes a first wire frame portion along the seat width direction,
A second wire frame portion bent upward with respect to the first wire frame portion,
The second wire frame portion is fixed to the rear end of the seat frame;
When the first wire frame portion presses the skin material from above, the following effects can be achieved. (Claim 2)

  Since the tension member is composed of a wire frame, the tension member can be easily formed into a desired shape. Moreover, since the skin material is pressed by the first wire frame portion along the sheet width direction, the skin material can be reliably stretched without slack. (Claim 2)

In the present invention,
If the wire frame is set to a length that extends over substantially the entire width of the rear end portion of the skin material, the following effects can be achieved. (Claim 3)

  The first wire frame portion can reliably stretch the substantially full width of the rear end portion of the skin material without slack. (Claim 3)

In the present invention,
A plurality of the second wire frame parts are provided in the wire frame at intervals in the sheet width direction,
When the second wire frame portion at the middle portion in the longitudinal direction of the wire frame is bent and formed in a U shape with the lower side open, and fixed to the rear end portion of the seat frame, the following action can be achieved. it can. (Claim 4)

  When the sheet width becomes large, the rigidity of the intermediate portion in the longitudinal direction of the wire frame tends to be insufficient, and there is a risk that deformation will occur. On the other hand, according to the above configuration of the present invention, since the U-shaped second wire frame part is fixed to the rear end portion of the seat frame, the diameter of the wire frame is not increased. The rigidity of the wire frame can be ensured. (Claim 4)

In the present invention,
When harnesses are passed between both side portions of the U-shaped second wire frame portion, the following effects can be achieved. (Claim 5)

  By passing harnesses between both side portions of the U-shaped second wire frame portion, a wiring space for the harnesses can be secured. Further, the shape of the rear end portion of the seat cushion can be prevented from becoming uneven by harnesses, and a high appearance can be obtained. Furthermore, the harnesses can be prevented from being pressed between the wire frame and the skin material, and disconnection of the harnesses can be prevented. (Claim 5)

According to the present invention,
Appearance quality could be improved, production costs could be reduced, and a sheet capable of simplifying the structure of the skin material could be provided.

Longitudinal side view of vehicle seat A perspective view showing the rear end of the seat cushion and the lower end of the seat back Perspective view showing seat frame and slide rail It is the figure which looked at the seat frame and the slide rail from the bottom, and shows the wiring state of the harness

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 3 show a vehicle seat 1. The vehicle seat 1 includes a seat cushion 2, a seat back 11, a pair of left and right slide rails 20 that slidably support the seat cushion 2 in the longitudinal direction of the seat, and a seat cushion 2 that moves up and down relative to the slide rail 20. And a lifter device 30 for changing and adjusting the height of the seating surface.

[Structure of seat cushion 2]
The seat cushion 2 includes a seat frame 6, a seat cushion pad 4 supported by the seat frame 6, and a skin material 5 that covers the seat cushion pad 4, and supports the thigh and buttocks of the occupant. The seat cushion pad 4 is formed of urethane foam.

[Structure of the seat back 11]
The seat back 11 includes a seat back frame, a seat back pad supported by the seat back frame, and a skin material that covers the seat back pad, and supports the back of the occupant. The seat back pad is formed of urethane foam. As shown in FIG. 2, a resin hinge cover 40 that covers the hinge mechanism between the lower end portion of the seat back 11 and the rear end portion of the seat cushion 2 is provided.

[Structure of slide rail 20]
The slide rail 20 includes a lower fixed rail 20A attached to the vehicle floor and an upper movable rail 20B that slides in the seat front-rear direction with respect to the fixed rail 20A.

[Structure of seat frame 6]
The seat frame 6 includes a rectangular container-like frame body 3 on which the seat cushion pad 4 is placed, and a pair of left and right side panels 21 whose panel surfaces face the seat width direction. A plurality of weight reduction holes 3H are formed through the frame main body 3. As shown in FIG. 1, a recessed portion 33 that is recessed upward is formed at the rear end portion of the frame body 3.

[Structure of lifter device 30]
The lifter device 30 includes a pair of left and right link mechanisms 29 that separately support the left and right sides of the seat frame 6 and a lifter rod 7 that interlocks and connects the ends of the pair of left and right link mechanisms 29 on the seat rear side Rr. ing. As shown in FIG. 1, the lifter rod 7 moves up and down in the recess 33 at the rear end of the frame body 3 by the operation of the lifter device 30. FIG. 1 shows the lifting stroke of the lifter rod 7. The white arrow indicates the lifting / lowering direction of the lifter rod 7. The ascending / descending direction is a direction inclined so as to be positioned upward as the seat front side Fr.

  The skin material 5 of the seat cushion 2 is divided into front and rear at the rear end portion side of the seat cushion 2, and the rear end portion of the main skin material 5A and the front end portion of the rear skin material 5B of the seat rear side Rr are sewn together. ing. Reference symbol A in FIG. 1 is a sewn portion between the rear end portion of the main skin material 5A and the front end portion of the rear skin material 5B.

  The rear skin material 5B wraps downward from the rear end portion of the seat cushion pad 4, covers the lifter rod 7 from below, and covers the lower surface of the end portion of the seat cushion pad 4 on the seat rear side Rr. . A hook 10 is connected to an end portion of the rear skin material 5B on the front side Fr of the seat, and the hook 10 is engaged with a cut and raised provided on the frame body 3.

  As shown in FIG. 1, the rear skin material is arranged so that the lowermost lifter rod 7 (the lifter rod 7 located at the lower stroke end) does not contact the rear skin material 5B of the seat cushion 2. A wire frame 8 (corresponding to a tension member) that stretches 5B from above is provided at the rear end of the frame body 3 of the seat frame 6. Appropriate tension is generated in the rear skin material 5B stretched by the wire frame 8.

  As shown in FIG. 3, the wire frame 8 includes a first wire frame portion 18 along the seat width direction, and a second wire frame portion 19 bent upward with respect to the first wire frame portion 18. The wire frame 8 is set to a length that extends over substantially the entire width of the rear end portion of the skin material 5 of the seat cushion 2.

  A plurality of second wire frame portions 19 are provided on the wire frame 8 at intervals in the sheet width direction. In the present embodiment, the second wire frame portion 19 is provided at both ends in the longitudinal direction of the wire frame 8 and a central portion in the longitudinal direction (corresponding to a middle portion in the longitudinal direction). The second wire frame portions 19 at both ends in the longitudinal direction of the wire frame 8 are bent upward in an L shape, and the upper horizontal piece 19A of the second wire frame portion 19 extends toward the center in the sheet width direction. The horizontal piece 19A is welded and fixed to the rear end portion of the frame body 3.

  As shown in FIGS. 1 and 3, the second wire frame portion 19 at the center in the longitudinal direction of the wire frame 8 is bent and formed in a U shape with the lower side open, and is recessed upward. Further, the upper end portions of both side portions 19B of the second wire frame portion 19 and the upper piece 19C connecting the upper end portions of the both side portions 19B are bent so as to be positioned on the upper side as the seat front side Fr. The upper end portions of the both side portions 19B and the upper piece 19C are welded and fixed to the rear end portion 3K of the frame body 3. The rear end portion 3K of the frame body 3 is also bent so as to be positioned on the upper side as the seat front side Fr.

  Furthermore, as shown in FIG. 4, a plurality of harnesses H are passed between both side portions 19 </ b> B of the U-shaped second wire frame portion 19. The intermediate portion in the longitudinal direction of the harness H in the seat front side Fr with respect to the second wire frame portion 19 is fixed to the lower surface of the frame body 3.

  In this structure, the pair of left and right first wire frame portions 18 along the seat width direction press the rear skin material 5B from above (see FIGS. 1 and 3).

According to the above configuration,
(1) A wire frame 8 is provided at the rear end portion of the frame body 3 so as to stretch the rear skin material 5B from above so that the lowermost lifter rod 7 does not contact the rear skin material 5B. . Accordingly, it is possible to prevent a change in the tension of the rear skin material 5B accompanying the raising and lowering of the seat cushion 2, and it is possible to prevent the rear skin material 5B from being over-stretched or loosened, and to provide an appropriate tension state of the rear skin material 5B. Can keep. As a result, the appearance quality of the vehicle seat 1 can be improved.
Further, since only a single rear skin material 5B is provided at the rear end portion of the seat cushion 2, an increase in the amount of the skin material 5 can be avoided, and the cost required for the skin material 5 can be reduced. And the structure of the skin material 5 can be simplified.

(2) Since the tension member is composed of the wire frame 8, the tension member can be easily formed into a desired shape. Further, since the rear skin material 5B is pressed by the first wire frame portion 18 along the seat width direction, the rear skin material 5B can be reliably stretched without slack.

(3) Since the wire frame 8 is set to a length extending over substantially the entire width of the rear end portion of the skin material 5, the rear end portion of the skin material 5 (rear side skin material 5 </ b> B) at the first wire frame portion 18. Can be stretched reliably without slack.

(4) If the sheet width is increased, the rigidity of the intermediate portion in the longitudinal direction of the wire frame 8 is likely to be insufficient, and there is a risk of deformation. However, according to the above configuration of the present invention, the U-shaped second wire Since the frame portion 19B is fixed to the rear end 3K of the frame body 3 of the seat frame 6, the rigidity of the wire frame 8 can be ensured without increasing the diameter of the wire frame 8.

(5) By passing the harness H between both side portions 19B of the U-shaped second wire frame portion 19, a wiring space for the harness H can be secured. Further, the shape of the rear end portion of the seat cushion 2 can be prevented from becoming uneven due to the harnesses H, and a high appearance can be obtained. Furthermore, the harness H can be prevented from being pressed between the wire frame 8 and the skin material 5 (rear skin material 5B), and disconnection of the harness H can be prevented.

[Another embodiment]
The lifter device 30 may have a structure in which the seat cushion 2 is raised and lowered with respect to the vehicle body floor to change and adjust the height of the seat surface. That is, the present invention can be applied to a vehicle seat that does not include the slide rail 20.

2 Seat cushion 3K Rear end of the seat frame (rear end of the frame body)
4 Seat cushion pad 5B Skin material (rear skin material)
6 Seat frame 7 Lifter rod 8 Stretch member (wire frame)
18 First wire frame portion 19 Second wire frame portion 19B Both side portions 20 of U-shaped second wire frame portion 20 Slide rail 29 Link mechanism 30 Lifter device H Harness Rr Seat rear side

Claims (5)

Seat cushion,
A lifter device that raises and lowers the seat cushion with respect to a slide rail or a floor to change and adjust the height of the seat surface;
The seat cushion includes a seat frame,
A seat cushion pad supported by the seat frame;
A skin material covering the seat cushion pad,
The lifter device includes a pair of left and right link mechanisms that separately support the left and right side portions of the seat frame, and a lifter rod that interlocks and connects end portions on the seat rear side of the pair of left and right link mechanisms,
The lifter rod is moved up and down by the operation of the lifter device,
The skin material is a seat that wraps downward from the rear end portion of the seat cushion pad, covers the lifter rod from below, and covers the lower surface of the end portion on the seat rear side of the seat cushion pad. ,
A seat in which a tension member for stretching the skin material from above is provided at a rear end portion of the seat frame so that the lowermost lifter rod does not contact the skin material. The tension member is composed of a wire frame,
The wire frame includes a first wire frame portion along the seat width direction,
A second wire frame portion bent upward with respect to the first wire frame portion,
The second wire frame portion is fixed to the rear end of the seat frame;
The sheet according to claim 1, wherein the first wire frame portion presses the skin material from above.   The sheet according to claim 2, wherein the wire frame is set to a length that extends over substantially the entire width of the rear end portion of the skin material. A plurality of the second wire frame parts are provided in the wire frame at intervals in the sheet width direction,
4. The seat according to claim 2, wherein a second wire frame portion at an intermediate portion in the longitudinal direction of the wire frame is bent and formed in a U shape with an open lower side, and is fixed to a rear end portion of the seat frame.   The seat according to claim 4, wherein harnesses are passed between both side portions of the U-shaped second wire frame portion.

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