JP2004016709A - Seat back for vehicles - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seat back for vehicles capable of being easily manufactured without sewing a facing. <P>SOLUTION: The facing 31 of the seat back for the vehicles is provided with a front cover part 31x covering the front surface of a cushion pad 30 and extension parts 31a-31c integrally extended from the front cover part 31x in four directions and is turned to one sheet without a seam. The upward extension part 31a covers the upper surface of the cushion pad 30 and is fixed to the back surface of an upper frame 21, the downward extension part 31b covers the bottom surface of the cushion pad 30 and is fixed to the back surface of a lower frame 23, and the leftward and rightward extension parts 31c to cover the left and right side faces of the cushion pad 30 and are fixed to side frames 22. A back part is covered with a cover 29. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a vehicle seat back.
[0002]
[Prior art]
Generally, a seat back of a vehicle includes upper, left and right side frames, a lower frame, and a cushion pad. The peripheral edge of the cushion pad is supported by the frame so as to surround the frame. The entire cushion pad is housed in a bag-like skin.
[0003]
[Problems to be solved by the invention]
In order to form the skin in a bag shape, it is necessary to sew at least two cloths, and there is a problem that the manufacture of the skin is complicated.
[0004]
[Means for Solving the Problems]
In order to solve the above problems, the present invention provides an upper, left and right side frames, a lower frame, a cushion pad supported by these frames, and a vehicle seatback including a skin, wherein the skin is: A single, seamless seam having a front cover portion that covers the front surface of the cushion pad and four extension portions extending in four directions from the front cover portion to cover the upper, lower, left, and right sides of the cushion pad, respectively. The terminal of the upwardly extending portion is fixed to the upper frame or the cushion pad, and the terminal of the downwardly extending portion is fixed to the lower frame or the cushion pad. A terminal of the extension portion is fixed to a side frame or a cushion pad, and further includes a back cover supported by the frame such that a back surface is exposed to a vehicle compartment. Chromatography is, the back of the cushion pad of course, characterized in that it hides to be invisible from outside the secured portion of the epidermis. Thus, the sewing can be easily performed without the need for sewing the outer skin, the manufacturing cost can be reduced, and the parts management can be facilitated. In addition, an aesthetic appearance can be ensured by the back cover.
[0005]
Here, it is desirable to provide a shoulder cover for covering the shoulder of the cushion pad and the skin on or around the shoulder. This makes it possible to secure the aesthetic appearance by covering the shoulder which is likely to wrinkle on the skin with the shoulder cover.
[0006]
The side frame has a plate shape extending vertically and is exposed to the passenger compartment by covering the outer skin, and an upper end portion of the side frame is curved along the shoulder portion of the cushion pad so as to be curved. It is desirable that the cover is used. As a result, the side frame and the shoulder cover can be integrally formed, and not only can the manufacturing and assembling be efficient, but also the degree of freedom in designing the side portion of the seat back can be increased. Alternatively, the shoulder cover may be integrally provided so as to protrude forward on both left and right sides of the upper end of the back cover.
[0007]
An escape portion is formed by the front cover portion, the upper extension portion, and the lateral extension portion of the skin so as to escape so as not to cover the shoulder portion of the cushion pad, and the escape portion of the exposed cushion pad and the skin in the escape portion is formed. Desirably, the peripheral edge is covered with the shoulder cover. As a result, it is possible to prevent wrinkles on the epidermis as much as possible, and furthermore, it is possible to reliably secure an aesthetic appearance with the shoulder cover.
[0008]
It is desirable that the skin is attached to the cushion pad with an adhesive. As a result, not only can the outer skin be easily attached to the cushion pad, but also the cushion pad can be fitted into the frame with the outer skin attached, so that the efficiency of the assembling operation can be increased.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the vehicle seat includes a seat portion 10 and a seat back 20 provided at a rear portion thereof. The seat 10 is supported by a pair of left and right rails 11 provided on the floor of the passenger compartment so as to be slidable in the front-rear direction. The seat back 20 is attached to the rear side of the seat 10 via a pair of right and left reclining devices 40 so that the angle of the seat back 20 can be adjusted. As is well known, the reclining device 40 includes a fixed bracket 41 connected to the seat 10, a rotating bracket 42 (FIG. 4) connected to the seatback 20, and a spring (not shown) for urging the bracket 42 to rotate. ) And locking means (not shown) for fixing the bracket 42 and thus the seat back 20 at a predetermined angle. The left and right reclining devices 40 are connected by a connecting shaft 43. One end (right end in this case) of the connection shaft 43 penetrates a side frame 22 described later, and a lever 44 for adjusting a reclining angle is provided there.
[0010]
As shown in FIG. 4, the seat back 20 includes upper, left and right, and lower frames 21 to 23 that form a skeleton, and a cushion pad 30 supported by the frames 21 to 23. The frames 21 to 23 are made of, for example, acrylonitrile butadiene styrene copolymer containing glass fiber (ABSG), polypropylene containing filler (PPF), polypropylene containing glass fiber (PPG), polyamide resin containing glass fiber (66 nylon G, 6 nylon G). And injection molded separately from each other.
[0011]
As shown in FIGS. 2 and 4, the upper frame 21 is formed in a gate shape having a main body 21 a extending left and right and a pair of legs 21 b extending downward from both ends thereof. The main body 21a is provided with a large number of reinforcing ribs 21d having a vertical plate shape or an X-shaped cross section. At both ends of the main body 21a, square bushes 21e are provided. A plurality of holes 21f are formed in the leg 21b so as to be separated in the extending direction (up and down). As described later, the bush 21e and the hole 21f are elements for connecting the side frame 22.
[0012]
As shown in FIGS. 2, 4, and 5, a locking portion 21g having a U-shaped cross section is provided on the leg portion 21b of the upper frame 21 so as to protrude rearward. An S-shaped spring 50 is horizontally stretched between the left and right legs 21b, and an end of the S-shaped spring 50 is hooked on the locking portion 21g.
[0013]
As shown in FIGS. 1, 2 and 4, the side frames 22 are arranged on the left and right outer sides of the upper frame 21. The left and right side frames 22 are formed in a plate shape having a substantially arc-shaped cross section and extend vertically. As will be described later, the side frames 22 are arranged on the left and right outer sides of the cushion pad 30 and are exposed to the passenger compartment without being covered with the skin 31, and the outer side surface is a cosmetic surface with a good appearance. ing. The upper end of the side frame 22 is gently curved so as to cover above the left and right ends of the upper frame body 21a (the shoulder on the upper surface side of the cushion pad 30) to form a shoulder cover 22X.
[0014]
On the inner surface of the side frame 22, an oblique lattice-like reinforcing rib 22a is formed over almost the entire surface.
A rectangular tube-shaped fitting portion 22b protrudes from an inner side surface of an upper portion of the side frame 22, and a vertically long seat surface 22c is formed below the fitting portion 22b. A plurality of cylindrical bosses 22d (convex portions) are provided on the seat surface 22c so as to be vertically separated. The bush 21e of the upper frame 21 is fitted into the fitting portion 22b. As shown in FIGS. 4 and 5, the leg 21b of the upper frame 21 is in contact with the seat surface 22c, and the boss 22d is inserted through the hole 21f. Then, the protruding end of the boss 22d is heated and melted and is caulked to the leg 21b. As a result, the upper frame 21 and the side frame 22 are connected, and the side frame 22 is reinforced by the legs 21b.
[0015]
As shown in FIGS. 2 and 4, the lower portion of the side frame 22 is wider than the upper portion. A substantially quadrangular seating surface 22e is formed on the inner side surface of the lower portion, and a plurality of cylindrical bosses 22f (convex portions) are provided on the seating surface 22e in rows and columns. As shown in FIG. 4 and FIG. 6, a mid-frame 24 (a reinforcing plate) made of sheet metal is attached to the seat surface 22e. A plurality of holes 24a are formed in the mid frame 24. The boss 22f of the side frame 22 is inserted through the hole 24a, and the protruding end of the boss 22f is heated and melted and is caulked to the mid frame 24. Thereby, the mid frame 24 is fixed to the side frame 22. The lower part of the side frame 22 is reinforced by the mid frame 24, and sufficient strength is provided as a joint with the reclining device 40.
[0016]
Two S-shaped springs 50 are bridged between the left and right mid frames 24. Each mid frame 24 is provided with two locking portions 24b vertically separated from each other, and the ends of the S-shaped springs 50 are hooked on the locking portions 24b, respectively. As shown in FIGS. 4 and 7, a sheet metal bracket 42 of the reclining device 40 is fixed to the lower side of the mid frame 24 with bolts 70 and nuts 71.
[0017]
The lower frame 23 is disposed between the left and right reclining devices 40. The lower frame 23 includes a plate-shaped main body 23a extending left and right and having the width direction directed up and down, and a pair of mounting arms 23b provided at both ends of the main body 23a so as to protrude forward. ing. The main body 23a is slightly curved so that the center in the left-right direction swells rearward. As shown in FIG. 9, the main body portion 23a has a square wave-shaped cross section, and has concave grooves along the longitudinal direction on both front and rear sides, and a number of vertical reinforcing ribs 23c are provided in these concave grooves.
[0018]
As shown in FIGS. 2 and 7, the mounting arm 23b of the lower frame 23 is provided with an insertion hole 23d and a projection 23e so as to form a vertical pair. The mounting arm 23b is in contact with the bracket 42 of the reclining device 40. A screw 72 is inserted into the insertion hole 23d of the mounting arm 23b, and the screw 72 is screwed into the screw hole 42a formed in the bracket 42 while cutting a female screw. The projection 23e is inserted through an insertion hole 42b formed in the bracket 42. Thus, the mounting arm 23b of the lower frame 23 is fixed to the bracket 42, and is further connected to the side frame 22 via the bracket 42 and the mid frame 24.
[0019]
As shown in FIGS. 1 and 4, the generally rectangular cushion pad 30 is fitted into rectangular frames 21 to 23.
A skin 31 is put on the cushion pad 30. As shown in FIG. 3, the skin 31 has a square front cover portion 31x at the center, and four extending portions 31a to 31c integrally extending in four directions from the front cover portion 31x, and is a single piece without seams. It is composed of cloth. The front cover portion 31x covers the front surface of the cushion pad 30. The front cover portion 31x and the cushion pad 30 are bonded with an adhesive.
[0020]
As shown in FIG. 8, the upwardly extending portion 31 a of the upper skin 31 covers an extending portion 30 a having an L-shaped cross section at the upper end of the cushion pad 30, and the main body of the upper frame 21 together with the pad extending portion 30 a. It is covered on the upper surface and the back surface of the portion 21a. The terminal of the upper extension 31a extends downward from the pad extension 30a, and is fixed to the back surface of the upper frame body 21a by a tucker (fastening means).
In addition, on the upper surface of the seat back 20, a headrest holder 62 penetrates the extension portions 31a, 30a and is embedded in the holder hole 21c of the upper frame main body portion 21a, and the stay 61 of the headrest 60 is inserted into and supported by the holder 62. Have been.
[0021]
As shown in FIGS. 7 and 9, the downward extending portion 31 b covers the bottom surface of the cushion pad 30, extends further backward, and is hooked on the lower edge of the main body portion 23 a of the lower frame 23. Folded up. The terminal of the extension portion 31b is fixed to the back surface of the lower frame body 23a by a tucker.
[0022]
As shown in FIGS. 1 and 4 to 7, the left and right laterally extending portions 31 c cover the left and right side surfaces of the cushion pad 30, respectively. The side frame 22 is further covered on the outside of the side extension 31c. As shown in FIG. 3, the side extension 31c has three (plural) ears 31d vertically separated from each other. As shown in FIGS. 5 and 6, these ear portions 31 d extend rearward from the cushion pad 30, and the ends thereof are fixed to the inner surface of the rear end edge of the side frame 22 by a tucker.
[0023]
As shown in FIGS. 3 and 4, the upper extension 31a of the skin 31 does not reach the left and right ends of the front cover 31x, and the side extension 31c extends to the upper end of the front cover 31x. Not reached. Thereby, the relief 31y with respect to the shoulder of the cushion pad 30 is formed by the left and right edges of the upper extension 31a, the upper edge of the lateral extension 31c, and the left and right corners of the upper end of the front cover 31x. The shoulder of the cushion pad 30 is exposed from the escape portion 31y. As shown in FIG. 1, the exposed portion of the cushion pad 30 and the periphery of the escape portion 31 y of the skin 31 are covered by a shoulder cover 22 </ b> X at the upper end of the side frame 22.
[0024]
Further, a back board 29 (back cover) is provided on the back of the seat back 20. The backboard 29 is formed in a rectangular plate shape with the same resin as the frames 21 to 23, and the back surface thereof is exposed to the passenger compartment as a good-looking decorative surface.
[0025]
The backboard 29 is supported by the frames 21 to 23. More specifically, as shown in FIG. 8, a hook 29a is protruded from an upper portion of the front surface of the back board 29. The hook 29a is locked in a locking hole 21h formed on the back surface of the main body 21a of the upper frame 21. As shown in FIGS. 5 to 7, locking claws 29 b are provided at left and right ends of the backboard 29. The locking claw 29b is hooked on the rear edge of the side frame 22. As shown in FIGS. 7 and 9, an L-shaped hooking piece 29 c protrudes from the lower part of the front surface of the backboard 29. The hook piece 29c is hooked on the main body 23a of the lower frame 23.
[0026]
The back board 29 covers not only the back of the cushion pad 30 and the S-shaped spring 50 but also the fastening portion of the terminal of the skin 31 so as not to be seen from the outside.
That is, as shown in FIG. 8, the upper end of the backboard 29 covers the upper extension 31 a of the skin 31 and covers the fastening portion. As shown in FIG. 9, the lower end of the back board 29 reaches the lower end of the lower frame 23 and covers and covers the fastening portion of the lower extension 31 b of the skin 31. As shown in FIGS. 5 to 7, the left and right ends of the backboard 29 are joined to the rear end of the side frame 22 without any gap, and close the seatback 20 so as not to be seen. As a result, the fastening portion of the laterally extending portion 31c of the skin 31 is not visible from the outside.
[0027]
A method for manufacturing a vehicle seat will be described.
The skin 31 is manufactured by press punching or the like. The cushion pad 30 is manufactured separately, an adhesive is applied to the front of the cushion pad 30, and the skin 31 is attached.
[0028]
After connecting the mid frame 24 and the reclining device 40, the mid frame 24 is attached to the side frame 22. Next, the upper frame 21 is attached between the upper portions of the left and right side frames 22, and the lower frame 23 is attached between the lower ends thereof via the mid frame 24 and the bracket 42 of the reclining device 40. Further, the connecting shaft 43, the lever 44, the S-shaped spring 50 and the like are attached.
[0029]
Then, the cushion pad 30 with the skin 31 is fitted to the front side of the frames 21 to 23, and the L-shaped extending portion 30 a is covered on the upper frame 21. Then, the terminal of the upper extending portion 31a of the skin 31 is fixed to the back surface of the upper frame 21, the terminal of the ear 31d of the lateral extending portion 31c is fixed to the inner surface of the side frame 22, and the terminal extends downward. The terminal of the part 31 b is fixed to the back of the lower frame 23. Thereafter, the backboard 29 is attached to the rear side of the frames 21 to 23. The holder 62 is fitted into the upper frame 21 and the headrest 60 is attached.
[0030]
After completing the seat back 20 in this manner, the fixing bracket 41 of the reclining device 40 is connected to the seat 10 manufactured separately. In addition, the said manufacturing procedure can be changed suitably.
[0031]
According to the vehicle seat, since the skin 31 is a single piece, it can be easily manufactured by one press punching, and sewing is unnecessary. Further, only one die for punching is required. Thereby, the manufacturing cost of the skin 31 can be reduced. Since the number of parts is reduced, management becomes easy.
The one skin 31 can be easily attached to the cushion pad 30 with an adhesive. Since the cushion pad 30 can be fitted into the frame with the skin 31 attached, the efficiency of the assembling operation can be improved.
With respect to the back, not only the back surface of the cushion pad 30 but also the fastening portion of the skin 31 can be hidden by the back board 29, and an aesthetic appearance can be secured. As for the shoulder, by forming the escape portion 31y on the skin 31, it is possible to prevent large wrinkles from being formed on the skin 31. Then, the exposed portion of the shoulder of the cushion pad 20 and the periphery of the escape portion 31y of the skin 31 can be covered with the shoulder cover 22X, and an aesthetic appearance can be secured.
[0032]
The present invention is not limited to the above embodiment, and can be appropriately modified. For example, instead of the tucker, a claw portion may be provided on the frame as a means for fastening the terminal of the extension portion to the frame, and a hook hole hooked to the claw portion may be provided on the skin terminal. The extension terminal of the epidermis may be bonded (fixed) to the back or side surface of the cushion pad with an adhesive instead of fixing to the frame.
The entire shoulder portion of the cushion pad may be wrapped in the skin without forming the escape portion in the skin. By covering the wrinkles of the epidermis formed by this with a shoulder cover, an aesthetic appearance can be secured.
Instead of providing the shoulder cover on the side frame, the shoulder cover may be integrally provided so as to protrude forward on both left and right sides of the upper end of the back cover. In this case, the side frame may be covered with a cushion pad.
[0033]
【The invention's effect】
As described above, according to the present invention, since the outer skin is made of a single piece, it can be easily manufactured without sewing, and the manufacturing cost can be reduced.
The shoulder which is likely to be wrinkled on the skin of one piece can be covered by providing a shoulder cover, and the appearance can be secured.
By exposing the side frame and integrally forming the shoulder cover at the upper end thereof, not only can the manufacturing and assembling be efficient, but also the degree of freedom in designing the seat back can be increased.
By forming a shoulder relief on the skin, wrinkling can be prevented as much as possible, and the cushion pad exposed from the relief and the periphery of the skin relief can be reliably secured by covering with a shoulder cover.
By attaching the skin to the cushion pad with an adhesive, not only can it be easily attached, but also the cushion pad can be fitted into the frame with the skin attached, improving the efficiency of assembly work. it can.
[Brief description of the drawings]
FIG. 1 is a perspective view of a vehicle seat according to an embodiment of the present invention.
FIG. 2 is an exploded perspective view of a seat back frame of the seat.
FIG. 3 is an exploded perspective view of a cushion pad and a skin of the seat back.
FIG. 4 is an exploded perspective view of a frame and a cushion pad of the seat back.
FIG. 5 is a cross-sectional view of the seat back taken along line VV in FIG. 1;
FIG. 6 is a cross-sectional view of the seat back taken along the line VI-VI in FIG. 1;
FIG. 7 is a cross-sectional view of the seat back taken along line VII-VII in FIG.
FIG. 8 is a longitudinal sectional view of the seat back taken along line VIII-VIII in FIG. 1;
FIG. 9 is a sectional view taken along the line IX-IX of FIG. 7;
[Explanation of symbols]
Reference Signs List 20 seat back 21 upper frame 22 side frame 22X shoulder cover 23 lower frame 29 back board (back cover)
30 Cushion pad 31 Skin 31a Upper extension 31b Lower extension 31c Side extension 31d Side extension ear 31x Front cover 31y Escape

Claims (5)

In a vehicle seat back including an upper, left and right side, lower frames, a cushion pad supported by these frames, and a skin,
The above-mentioned skin integrally has a front cover portion that covers the front surface of the cushion pad, and four extension portions that extend in four directions from the front cover portion and cover the upper, lower, left, and right side surfaces of the cushion pad, respectively. The terminal of the upward extension is fixed to the upper frame or the cushion pad, and the terminal of the downward extension is fixed to the lower frame or the cushion pad. The terminal of the extension to the side is fixed to the side frame or cushion pad,
Further, a back cover is provided which is supported by the frame such that the back surface is exposed to the vehicle compartment, and the back cover hides not only the back of the cushion pad but also the fastening portion of the skin so as not to be seen from the outside. A seat back for a vehicle, comprising: The vehicle seat back according to claim 1, further comprising a shoulder cover that covers a shoulder of the cushion pad and a skin on or around the shoulder. The side frame has a plate shape extending vertically and is exposed to the vehicle compartment by covering the outer skin, and an upper end portion of the side frame is curved along the shoulder portion of the cushion pad so as to be curved. The vehicle seat back according to claim 2, wherein the vehicle seat back is a part cover. An escape portion is formed by the front cover portion, the upper extension portion, and the side extension portion of the skin so as to escape so as not to cover the shoulder portion of the cushion pad. The vehicle seat back according to claim 2 or 3, wherein a peripheral edge is covered with the shoulder cover. The vehicle seat back according to any one of claims 1 to 4, wherein the skin is attached to the cushion pad with an adhesive.

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