JP6537879B2 - Vehicle seat - Google Patents

Description

  The present invention relates to a vehicle seat, and more particularly to a vehicle seat provided with a height link device capable of raising and lowering a seat body.

  Hitherto, there has been known a hight link device for supporting the seat body so as to be moved up and down, and a vehicle seat provided with a reclining device, and a frame for improving fuel efficiency of the vehicle while securing frame connection rigidity around these devices. There are various ideas for achieving weight reduction (see, for example, Patent Documents 1 and 2).

In a vehicle seat with a reclining device described in Patent Document 1, in a cushion frame serving as a framework of a seat cushion, a connecting portion with the reclining device is thick in order to secure the rigidity of cushion side frames disposed on the left and right sides. There is a device for making a thin portion and a portion that does not require relatively high strength.
In addition, protruding flanges that protrude to one side in the seat width direction are formed at the upper end and the lower end of the cushion side frame to ensure frame rigidity.

Further, in the vehicle seat with the height link device described in Patent Document 2, a closed cross-sectional structure is formed by overlapping the reinforcing frame with the lower end portion of the cushion side frame in the seat width direction.
According to the above-described configuration, the rigidity of the cushion side frame can be secured while the frame can be formed thin, and the weight of the frame can be reduced.

JP, 2011-88553, A JP, 2011-20593, A

  However, for the vehicle seat as in Patent Documents 1 and 2, the frame connection rigidity around the device such as the hight link device is improved by a simpler processing method (manufacturing method), and the weight of the frame is reduced. A technology that could be fulfilled was required.

The present invention has been made in view of the above problems, and an object of the present invention is to improve the rigidity of a seat frame serving as a skeleton and achieve weight reduction of the seat frame by a simple manufacturing method. It is providing a vehicle seat.
Another object of the present invention is a vehicle seat capable of securing frame connection rigidity around devices such as a hight link device and a reclining device by a simple manufacturing method, and achieving weight reduction of a seat frame. To provide.

According to the vehicle seat of the present invention, the subject includes a cushion frame serving as a framework of the seating portion, and the cushion frame is disposed on the left and right sides in the seat width direction and extends in the seat longitudinal direction A projecting flange is formed at an end portion of the side frame in the vertical direction, the projecting flange projecting to one side in the seat width direction from the body portion of the side frame, and the projecting flange extends to project to the one side A first wall portion, a second wall portion bent continuously from the first wall portion, and extending in a direction intersecting with the extending direction of the first wall portion, and a second wall portion continuous from the second wall portion And a third wall extending to the side opposite to the one side while facing the first wall, and the first wall and the third wall facing each other Among them, a portion close to the second wall side in the sheet width direction The side than the portion close to the body portion side of the frame is formed to be wider in the opposite direction, the projecting flange, the portion close to the second wall portion of the first wall portion, the second It is configured to form a curved surface shape continuous to a portion close to the second wall portion side of the third wall portion through the wall portion, and the extension end portion of the third wall portion is the first The problem is solved by extending substantially parallel to the wall .

As described above, the side frame is formed with the projecting flange, and the projecting flange is continuously bent from the first wall extending to one side in the seat width direction and the first wall, and the first wall is formed. The second wall extending in the cross direction with the extension direction of the part, and the third wall extending continuously from the second wall and extending to the opposite side while facing the first wall Since the wall portion is provided, the rigidity of the side frame (cushion frame) can be enhanced by a simple processing method in which the shape of the projecting flange is devised. Further, for example, the side frame can be formed of a single sheet metal member, and a plurality of sheet metal members are not stacked and formed as in the prior art, so that the weight of the frame can be reduced.
In the projecting flange, of the opposing portions of the first wall portion and the third wall portion, a portion closer to the second wall portion side in the seat width direction is wider in the opposing direction than a portion closer to the main body portion side of the side frame Therefore, for example, as compared with the case where the projecting flanges are substantially U-shaped and the widths between the first wall portion and the third wall portion are equal, disconnection of the projecting flanges The area can be increased. As a result, the rigidity of the side frame can be enhanced.
Further, as described above, when the projecting flange is formed in a curved shape, stress is easily dispersed in the portion of the side frame provided with the projecting flange.

At this time, the extension end of the third wall portion and the first wall portion may be vertically overlapped and welded.
At this time, the projecting flange is a first projecting flange provided on the upper end portion of the side frame, and the outer edge portion of the side frame is different from the portion where the first projecting flange is formed, A second projecting flange is formed projecting in the sheet width direction in the opposite direction to the projecting direction of the first projecting flange, and the first projecting flange and the second projecting flange are formed on the main portion of the side frame. It is good if it is arranged in the position which becomes symmetrical symmetrically.

At this time, the protruding flange is provided at the upper end portion of the side frame and is formed to protrude inward in the seat width direction, and the first wall portion is a bottom wall extending inward in the seat width direction. The second wall portion is a side wall portion which is bent continuously from the inner end portion of the bottom wall portion and extends upward, and the third wall portion is formed of an upper end portion of the side wall portion. It is an upper wall which extends continuously in the sheet width direction while facing the bottom wall continuously, wherein an end portion of the upper wall near the side wall is the side frame It is good to be formed so that it may be arranged in the upper position rather than the end portion near the body portion side of .
With the above configuration, since the projecting flange is formed at the upper end portion of the side frame where the stress is likely to be concentrated when a relatively large load is applied, the rigidity of the cushion frame can be enhanced. Further, if the protruding flange is formed on a portion of the side frame where stress is likely to be concentrated, the side frame can be formed thin as a whole, and the weight of the frame can be reduced.

At this time, a height link device is provided which vertically connects the cushion frame to a base member disposed below the cushion frame, and the height link device connects the side frame and the base member in the vertical direction. The projecting flange may project to a position covering the link from above in the sheet width direction .

At this time, of the facing portions of the first wall portion and the third wall portion in the projecting flange, an end portion closer to the second wall portion side is wider in the opposing direction than the thickness of the side frame. It is formed as.
With the above configuration, for example, the cross-sectional area of the protruding flange can be secured large compared to the case where the first wall portion and the third wall portion are folded in the protruding flange. As a result, the rigidity of the side frame can be enhanced.

At this time, the projecting flange is a first projecting flange provided on the upper end portion of the side frame, and the outer edge portion of the side frame is different from the portion where the first projecting flange is formed, A second projecting flange projecting in the sheet width direction is formed,
The second projecting flange, an upper end portion and lower end portion at the outer edge portion of the side frame is formed in the sheet trailing edge portion, the first projecting flange in the sheet width direction is formed to project to the opposite side, the It is good to form continuously in the outer edge part of a side frame.
As described above, by providing the first projecting flange and the second projecting flange at the outer edge portion of the side frame, the rigidity of the side frame is secured substantially uniformly.
In particular, the second projecting flange is connected to the back frame serving as the framework of the backrest of the side frames, and is provided so as to surround the seat rear portion requiring relatively rigidity, which is significant.
Further, with the above configuration, the side frame can be excellent in the balance of the frame rigidity.

At this time, there is provided a height link device for movably connecting the cushion frame to a base member disposed below the cushion frame, the height link device including a brake unit for restricting the cushion frame from moving up and down. The brake unit may be attached to a side surface of the side frame in the seat width direction, and in the side frame, the projecting flange may be disposed at a position vertically overlapping the brake unit.
According to the above configuration, in the vehicle seat with the height link device, rigidity can be enhanced in the upper end portion or the lower end portion of the brake unit which is relatively easy to concentrate stress among the side frames.

At this time, the height link device includes a link which connects the side frame and the base member in the vertical direction and is disposed at a position overlapping the brake unit in the seat width direction, and the projecting flange is in the seat width direction It is good to protrude to the position which covers the said link.
As described above, since the end portion in the vertical direction of the side frame extends to a position covering the link (drive link), for example, it is possible to suppress foreign matter and the like from entering the sector gear portion provided in the drive link. And the operation of the hight link system will be good.

At this time, the cushion frame connects the seat front portions of the left and right side frames and has a pan frame having a substantially plate shape, and the projecting flange is the pan of the side frames in the seat longitudinal direction. It is preferable to extend from the peripheral position of the front portion to which the frame is attached to the rear position beyond the position to which the brake unit is attached.
By the configuration of the protruding flange, the rigidity of the side frame extending in the longitudinal direction of the seat can be secured substantially entirely.

According to the present invention, the rigidity of the side frame (cushion frame) can be enhanced by a simple processing method in which the protruding flange is formed on the side frame and the shape of the protruding flange is devised. In addition, since the plurality of sheet metal members are not stacked and formed as in the related art, the weight of the frame can be reduced.
Also, for example, the cross-sectional area of the projecting flange can be increased as compared to the case where the projecting flange has a substantially U-shape and the widths between the first wall portion and the third wall portion are equal. . As a result, the rigidity of the side frame can be enhanced.
According to the present invention, the side frame can be formed thin as a whole while improving the rigidity of the side frame, and the weight of the frame can be reduced.
According to the present invention, stress is easily dispersed in the portion of the side frame provided with the projecting flange.
According to the present invention, for example, compared with the shape in which the first wall portion and the third wall portion are in contact, the shape is excellent in mass production processability, and the contact portion of the wall portions in the projecting flange is joined intentionally Also, the process of
According to the present invention, for example, a large cross-sectional area of the projecting flange can be secured as compared with the case where the first wall portion and the third wall portion are folded in the projecting flange. As a result, the rigidity of the side frame can be enhanced.
According to the present invention, the rigidity of the side frame is substantially uniform, and the side frame is excellent in the balance of the frame rigidity.
According to the present invention, in a vehicle seat with a height link device, rigidity can be enhanced in the upper end portion or the lower end portion of the brake unit which is relatively easy to concentrate stress among the side frames.
According to the present invention, for example, foreign matter and the like can be prevented from entering the sector gear portion provided in the drive link, and the operation of the height link device becomes favorable.
According to the present invention, the rigidity of the side frame extending in the front-rear direction of the seat can be secured substantially entirely.

It is a perspective view of a vehicular seat concerning this embodiment. It is a perspective view of a seat frame used as frame of a vehicular seat. It is a principal part enlarged view of FIG. 2, Comprising: It is a perspective view which shows a reclining apparatus periphery. It is a principal part enlarged view of FIG. 2, Comprising: It is a perspective view which shows a side frame periphery. It is a VV sectional view of Drawing 4, and is a perspective view showing a height link device. FIG. 6 is a cross-sectional view taken along the line VI-VI of FIG. 4, showing a side frame. It is a figure which shows 2nd Example of a side frame, and is VI-VI sectional drawing of FIG.

Hereinafter, a vehicle seat according to an embodiment of the present invention will be described with reference to FIGS. 1 to 7.
The present embodiment is a vehicle seat provided with a height link device, and a projecting flange is formed on the upper end portion of the side frame disposed on the left and right sides of the cushion frame, and this projecting flange is in the seat width direction A bottom wall extending inward, a side wall bent upward from the bottom wall, and a side wall extending upward, bent from the side wall and extending outward in the sheet width direction while facing the bottom wall In the opposing portion of the top wall and the bottom wall, a portion closer to the side wall in the sheet width direction has a top wall, and in the vertical direction as compared to a portion closer to the main portion of the side frame The present invention relates to an invention of a vehicle seat characterized in that it is formed to be wide.
The side where the occupant sits on the seat back of the vehicle seat is the seat front side.

As shown in FIG. 1, the vehicle seat S of the present embodiment rotates the seat back 2 with respect to the seat cushion 1 as shown in FIG. 2, and a seat body including the seat cushion 1 and the seat back 2. The recliner device 30, which is connected to the vehicle body, the height link device 40, which vertically connects the seat body to the vehicle body floor, and the rail device 50, which is attached to the vehicle body floor and supports the seat body movably back and forth Is configured.
The rail device 50 corresponds to a base member in the claims.

As shown in FIG. 1, the seat cushion 1 is a seating portion for supporting a seated person from below, and the cushion frame 1 shown in FIG. Is configured.
The seat back 2 is a backrest portion for supporting the back of a seated person from behind, and is configured by mounting the cushion pad 2a on a back frame 20 shown in FIG. .

The cushion frame 10 is, as shown in FIG. 2, formed of a substantially rectangular frame-like body, and is a plate-like pan frame 12 connecting the side frames 11 disposed on the left and right sides and the front portion of each side frame 11. And a pipe-like rear connection frame 13 for connecting the rear portions of the side frames 11 and three elastic springs 14 which are hooked to the pan frame 12 and the rear connection frame 13 and extend in a serpentine manner. Is configured.
The side frame 11 is a sheet metal member extending in the longitudinal direction of the seat and having a substantially I-shaped longitudinal cross section. A reclining device 30 is attached to the rear portion thereof, and a height link device 40 is attached to the lower portion thereof. Rail device 50 is attached.
Details of the side frame 11 will be described later.

As shown in FIG. 2, the back frame 20 is a substantially rectangular frame body, and a substantially reverse U-shape connecting the back side frames 21 disposed on the left and right sides and the upper end portion of each back side frame 21. Upper frame 22, a lower plate 23 having a substantially plate shape connecting lower end portions of the respective back side frames 21, and two elastic springs 24 which are hooked to the respective back side frames 21 and extend in a serpentine manner; Mainly composed of
The back side frame 21 is a sheet metal member extending in the vertical direction and having a substantially U-shaped cross section, and the lower end portion thereof is connected to the rear end portion of the side frame 11 via the reclining device 30. In such a state, the back frame 20 can rotate relative to the cushion frame 10.

  As shown in FIG. 3, the reclining device 30 is switchable between a locked state in which the rotational movement of the back frame 20 is locked and a unlocked state, and the state in which the back frame 20 is locked in a predetermined standing posture Thus, the lock state is released by operating the recycle control lever 36 shown in FIG. 1, and the upright posture of the back frame 20 can be adjusted.

The reclining device 30 is axially supported by the reclining unit 31 for restricting the rotation of the back frame 20 and at the lower end portion of the back frame 20 in the seat width direction, protrudes from the outer surface of the back frame 20 and is connected with the reclining unit 31 And a spiral spring 33 attached to the outside in the seat width direction of the reclining unit 41 and urging the back frame 20 to rotate toward the cushion frame 10 about the rotation axis 32. It is done.
The rotation shaft 32 is axially supported on the back frame 20 side (back side frame 21) and the cushion frame 10 side (side frame 11) in the seat width direction.
One end of the spiral spring 33 is locked to the spring locking bracket 34 attached to the outer surface of the back side frame 21, and the other end is fixed to the spring locking member 35 attached to the outer surface of the side frame 11. It is configured to be locked.

As shown in FIG. 4, the height link device 40 is attached between the cushion frame 10 and the rail device 50, and the left and right first links 41 disposed on the seat front side and the left and right disposed on the seat rear side. The second link 42 serves as a driving link, and the height of the seat body can be adjusted.
As shown in FIG. 5, a sector gear portion 42a is formed as a gear at a part of the outer peripheral portion of the second link 42 in the connection portion on the cushion frame 10 (side frame 11) side, which will be described later And a pinion gear 44a provided on the left and right inside of the brake unit 44 of FIG.

Further, as shown in FIGS. 4 and 5, the height link device 40 is pivotally supported by the side surface of the side frame 11 in the seat width direction, and is rotated via the brake rotation shaft 43 projecting outward and the brake rotation shaft 43. A brake unit 44 which is movably attached and which restricts the elevating operation of the seat body, and a height control lever 45 which is movably attached via the brake rotation shaft 43 and the brake unit 44 and elevating the seat body Have.
The brake unit 44 is attached to the outer surface of the side frame 11 via a mounting bracket 46. The mounting bracket 46 is mounted to the side frame 11 by a first mounting member 46 a and a second mounting member 46 b located at positions sandwiching the brake unit 44 in the seat longitudinal direction.

  In the above configuration, when the height control lever 45 is operated, the pinion gear 44a rotates integrally with the brake rotation shaft 43, and the meshing position of the pinion gear 44a and the sector gear portion 42a changes. Furthermore, the second link 42 on the left side where the sector gear portion 42a is formed is rotated, and the second link 42 on the right side and the first links 41 on the right side are also rotated following the second link 42 on the left side. As a result, the seat body is raised and lowered to adjust the seat height.

As shown in FIG. 4, the rail device 50 is fixed to the vehicle floor and includes left and right lower rails 51 extending in the seat longitudinal direction, left and right upper rails 52 slidably supported along the lower rails 51, and upper rails 52. A lock member (not shown) that locks in a non-slidable manner and a rail operation lever 53 that releases the lock state of the lock member are mainly configured.
The upper rail 52 is an elongated body that slides along the lower rail 51 in a state of being inserted into the housing space of the lower rail 51, and the upper portion thereof is connected to the cushion frame 10 via the connection bracket 54.
The connection bracket 54 is formed of a sheet metal member having a substantially L-shaped longitudinal section extending in the longitudinal direction of the seat, and connects the upper rail 52 and the links 41 and 42 on the cushion frame 10 side in the vertical direction.

<Details of side frame>
As shown in FIGS. 4 and 6, the side frame 11 extends in the longitudinal direction of the seat, and is provided at the upper end portion of the main body frame 110 having a substantially I-shaped cross section and the main body frame 110. And a second protruding flange 112 provided on the lower end portion of the main body frame 110 and bent and protruding outward in the sheet width direction. .

As shown in FIG. 4, the end portion of the pan frame 12 is mounted on and attached to the front end portion of the upper surface of the main body frame 110. The first link 41 is attached at a position slightly behind the portion where the pan frame 12 is attached on the side surface of the main body frame 110.
As shown in FIG. 2, the main body frame 110 slightly extends outward in the seat width direction as it extends rearward from the position where the brake unit 44 is attached in the seat longitudinal direction.
By doing so, the space formed between the side frame 11 and the back side frame 21 can be utilized to arrange the reclining unit 31 and also the rigidity of the reclining device 30 and the peripheral portion of the brake unit 44 is improved. I am doing it.

  As shown in FIG. 6, the first projecting flange 111 has a substantially U-shaped cross section, and continuously extends upward from the bottom wall portion 111a projecting inward in the sheet width direction and the tip of the bottom wall portion 111a. And an upper wall portion 111c continuously bent from the upper end of the side wall portion 111b to the outside in the sheet width direction and extending while facing the bottom wall portion 111a. There is.

The bottom wall portion 111a and the upper wall portion 111c are disposed at positions separated in the vertical direction, which are aligned to face each other.
Specifically, of the opposing portions of the bottom wall portion 111a and the upper wall portion 111c, the portion closer to the side wall portion 111b in the sheet width direction is formed to be wider in the vertical direction than the portion closer to the main body frame 110 side. It is done.
In other words, the end portion of the upper wall portion 111c closer to the side wall portion 111b is formed at a position above the end portion closer to the body frame 110.
Of the opposing portions of the bottom wall portion 111a and the upper wall portion 111c, an end portion closer to the side wall portion 111b is formed to have a larger interval in the opposing direction than the thickness of the side frame 11.

The first projecting flange 111 is configured such that the side wall portion 111 b and the portion of the upper wall portion 111 c closer to the side wall portion 111 b form a curved shape.
Specifically, the side wall portion 111b has a semicircular curved surface portion, and the upper wall portion 111c is inclined downward to the outer side in the sheet width direction continuously from the side wall portion 111b and in an arc-shaped curved surface portion. And a horizontal portion extending outward along the sheet width direction.

As shown in FIG. 6, the second projecting flange 112 is substantially U-shaped in cross section, and is bent downward from the tip of the upper wall portion 112a projecting outward in the sheet width direction and the upper wall portion 112a. A side wall portion 112b extending in a vertical direction, and a bottom wall portion 112c bent inward in the sheet width direction from the lower end of the side wall portion 112b and extending opposite to the upper wall portion 112a with a predetermined distance therebetween. There is.
The second projecting flange 112 is configured to form a semicircular curved surface shape by the upper wall portion 112a, the side wall portion 112b, and the bottom wall portion 112c.

In the above configuration, as shown in FIG. 4, the first projecting flange 111 starts from the peripheral position of the portion of the upper end of the side frame 11 to which the pan frame 12 is attached in the seat longitudinal direction, and the brake unit 44 is attached It extends to a position slightly beyond the part that has been
In other words, the first projecting flange 111 starts from the position where the first link 41 is attached at the upper end of the side frame 11 and extends to the position where the main body frame 110 protrudes outward in the seat width direction.
Therefore, it is possible to improve the rigidity of the first link 41 and the upper end portion of the brake unit 44, which are portions of the side frame 11 where stress is easily concentrated.

In the above configuration, as shown in FIG. 2, the second projecting flange 112 starts from a portion of the lower end of the side frame 11 to which the pan frame 12 is attached in the seat longitudinal direction, and a portion to which the reclining device 30 is attached. It extends up to
Further, as shown in FIG. 3, the second projecting flange 112 extends continuously from the lower end portion of the side frame 11 to a predetermined position of the rear end portion and the upper end portion so as to surround the reclining device 30.
Therefore, it is possible to improve the rigidity around the reclining device 30 which is a portion where the stress is relatively easily concentrated among the side frames 11.

In the above configuration, as shown in FIG. 5, the first projecting flange 111 projects from the upper end portion of the main body frame 110 in the seat width direction to a position covering the second link 42 (drive link) from above.
Therefore, it is possible to suppress, for example, the entry of foreign matter or the like into the sector gear portion 42a provided in the second link 42, and the operation of the height link device 40 becomes favorable.

Second Embodiment of Side Frame
Next, a second embodiment of the side frame will be described based on FIG.
In addition, the content which overlaps with the side frame 11 mentioned above in the following description abbreviate | omits description.
In the side frame 11 'according to the second embodiment, a main body frame 110' having a substantially I-shaped cross section, a first projecting flange 111 'provided at an upper end portion of the main body frame 110', and a lower end of the main body frame 110 ' And a second projecting flange 112 'provided at the portion.

The first projecting flange 111 'is substantially U-shaped in cross section, and is configured by welding a bottom wall portion 111a' and an upper wall portion 111c 'in the vertical direction so as to overlap.
Similarly, the second projecting flange 112 'has a substantially U-shaped cross section, and the top wall 112a' and the bottom wall 112c 'are disposed at positions separated in the vertical direction.
The rigidity of the side frame 11 'extending in the seat longitudinal direction is further improved by the configuration of the projecting flange.

<Other Embodiments>
In the above embodiment, as shown in FIG. 2, the vehicle seat S is configured to include the height link device 40 and the rail device 50, but this is not always necessary. For example, a base fixed to a vehicle body floor The member and the cushion frame 10 (side frame 11) may be directly connected.

  In the above embodiment, as shown in FIG. 2, the first projecting flange 111 and the second projecting flange 112 are formed at the end portions in the vertical direction of the cushion frame 10 (side frame 11), but are particularly limited. Instead, for example, it may be formed at an end portion in the front-rear direction of the back frame 20 (back side frame 21).

In the above embodiment, as shown in FIG. 6, the first projecting flange 111 is formed to project outward from the upper end of the main body frame 110 in the seat width direction, but is not particularly limited. It may protrude inside.
Similarly, the second projecting flange 112 may also project inward in the sheet width direction, for example.

In the above embodiment, as shown in FIG. 6, the first projecting flange 111 is formed at the upper end of the main body frame 110, but is not particularly limited, for example, may be formed at the lower end of the main body frame 110 Alternatively, it may be formed at the central portion of the main body frame 110 in the vertical direction.
Similarly, the second projecting flanges 112 can form projecting flanges in any combination.

  Although the vehicle seat used for a car was explained as a specific example in the above-mentioned embodiment, it is not limited to this, Other than a vehicle seat such as a train or a bus, it is also used as a vehicle seat such as an airplane or a ship can do.

In the present embodiment, the vehicle seat according to the present invention has been mainly described.
However, the above embodiment is merely an example for facilitating the understanding of the present invention, and does not limit the present invention. The present invention can be modified and improved without departing from the gist thereof, and the present invention naturally includes the equivalents thereof.

S Vehicle Seat 1 Seat Cushion 1a, 2a Cushion Pad 1b, 2b Skin Material 2 Seat Back 10 Cushion Frame 11, 11 'Side Frame 12 Pan Frame 13 Rear Coupling Frame 14 Elastic Spring 20 Back Frame 21 Back Side Frame 22 Upper Frame 23 Lower frame 24 elastic spring 30 recliner 31 recliner unit 32 rotary shaft 33 spiral spring 34 spring lock bracket 35 spring lock member 36 locker control lever 40 height link device 41 first link 42 second link (drive link)
42a Sector gear portion 43 Brake rotating shaft 44 Brake unit 44a Pinion gear 45 Height operating lever 46 Mounting bracket 46a First mounting member 46b Second mounting member 50 Rail device 51 Lower rail 52 Upper rail 53 Rail operating lever 54 Connection bracket 110, 110 'Main body Frame 111, 111 'first projecting flange 111a, 111a' bottom wall 111b, 111b 'side wall 111c, 111c' upper wall 112, 112 'second projecting flange 112a, 112a' upper wall 112b, 112b 'side wall 112c, 112c 'bottom wall

Claims (10)

It has a cushion frame that is the framework of the seating area,
The cushion frame has side frames disposed on the left and right sides in the seat width direction and extending in the seat longitudinal direction,
At an end portion of the side frame in the vertical direction, a projecting flange is formed which protrudes from the body portion of the side frame to one side in the seat width direction,
The projecting flange is continuously bent from the first wall extending to the one side and the first wall, and extends in a direction intersecting with the extending direction of the first wall. A second wall, and a third wall bent continuously from the second wall and extending to the opposite side to the first side while facing the first wall;
Of the opposing portions of the first wall portion and the third wall portion, the portion closer to the second wall portion side in the sheet width direction is wider in the opposing direction than the portion closer to the main body portion side of the side frame is formed so as to,
The projecting flange is continuous from a portion near the second wall portion side in the first wall portion to a portion near the second wall portion side in the third wall portion via the second wall portion Configured to form a curved surface shape,
The extended end of the third wall extends substantially in parallel with the first wall. The vehicle seat according to claim 1, wherein the extension end of the third wall portion and the first wall portion are vertically overlapped and welded. The projecting flange is a first projecting flange provided at an upper end portion of the side frame,
In the outer edge portion of the side frame, at a portion different from the portion where the first projecting flange is formed, a second projecting flange that protrudes in the opposite direction to the direction in which the first projecting flange projects in the seat width direction is formed And
The vehicle seat according to claim 1 or 2, wherein the first projecting flange and the second projecting flange are disposed at positions symmetrical with respect to the main body portion of the side frame. . The projecting flange is provided at an upper end portion of the side frame and is formed so as to project inward in the seat width direction.
The first wall portion is a bottom wall portion extending inward in the sheet width direction,
The second wall is a side wall which is bent continuously from the inner end of the bottom wall and extends upward,
The third wall portion is an upper wall portion that is bent continuously from the upper end portion of the side wall portion and extends outward in the sheet width direction while facing the bottom wall portion,
In the upper wall portion, an end portion close to the side wall portion side is formed to be disposed at an upper position than an end portion close to the body portion side of the side frame. The vehicle seat according to any one of to 3. It has a height link device that liftably connects the cushion frame to a base member disposed below the cushion frame.
The height link device includes a link connecting the side frame and the base member in the vertical direction,
The vehicle seat according to claim 4, wherein the projecting flange projects to a position covering the link from above in the seat width direction. Of the facing portions of the first wall portion and the third wall portion in the projecting flange, an end portion near the second wall portion side is formed to be wider in the opposing direction than the thickness of the side frame The vehicle seat according to any one of claims 1 to 5, characterized in that: The projecting flange is a first projecting flange provided at an upper end portion of the side frame,
In an outer edge portion of the side frame, a second projecting flange that protrudes in the seat width direction is formed at a portion different from the portion where the first projecting flange is formed,
The second projecting flange,
Formed at the outer edge portion of the side frame at the upper end portion and the lower end portion, and at the sheet rear end portion,
The sheet according to any one of claims 1 to 6, characterized in that it is formed so as to project on the side opposite to the first projecting flange in the sheet width direction, and is formed continuously at the outer edge portion of the side frame. Car seat. It has a height link device that liftably connects the cushion frame to a base member disposed below the cushion frame.
The height link device includes a brake unit that regulates the elevation of the cushion frame,
The brake unit is attached to a side surface of the side frame in the seat width direction.
The vehicle seat according to any one of claims 1 to 7, wherein in the side frame, the projecting flange is disposed at a position overlapping the brake unit in the vertical direction. The height link device includes a link that connects the side frame and the base member in the vertical direction, and is disposed at a position overlapping the brake unit in the seat width direction.
The vehicle seat according to claim 8, wherein the projecting flange projects to a position covering the link in the seat width direction. The cushion frame connects the seat front portions of the left and right side frames, and has a pan frame having a substantially plate shape,
The projecting flange extends from a peripheral position of a front portion of the side frame to which the pan frame is attached to a rear position beyond a position to which the brake unit is attached in the seat longitudinal direction. The vehicle seat according to claim 8 or 9.

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