Vehicle seats

Abstract

To provide a vehicle seat which achieves downsizing and weight reduction while securing rigidity of a seat support.SOLUTION: A seat support 60 of a vehicle seat has: left and right front foot members 61 which are attached spaced part from each other in a seat width direction on a vehicle body floor and extend so as to protrude upward from the vehicle body floor; and a foot connection member 63 which connects upper portions of the left and right front foot members 61 and is disposed so as to partially overlap with the left and right front foot members 61 in a vertical direction. Out of the front foot member 61, a facing wall part 61a which is disposed facing the foot connection member 63 in the vertical direction and left and right side wall parts 61b which continuously bend from both end portions as seen in the seat width direction of the facing wall part 61a and protrude so as to contact with the foot connection member 63, and the foot connection member 63 form a closed cross section structure.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present invention relates to a vehicle seat, and more particularly to a vehicle seat provided with a seat support that is attached between a seat body and a vehicle floor and supports the seat body from below.

Background Art

[0002] Conventionally, in a vehicle seat used for an automobile or the like, in order to ensure a good seating feeling for the seated person, the seat surface position of the seat body is raised from the vehicle floor surface to a predetermined height position, and a seat support is provided between the seat body and the vehicle floor. A vehicle seat is known (see, for example, Patent Document 1).

[0003] The vehicle seat provided with the seat support described in Patent Document 1 mainly includes left and right front legs attached to the vehicle floor at intervals in the seat width direction, left and right rear legs disposed behind the seat with respect to the front legs, and left and right cover members extending in the seat front-rear direction and connecting the front legs and the rear legs. And a cross member that extends in the seat width direction and connects the left and right cover members. In the above configuration, in order to increase the rigidity of the seat support, a closed cross-section structure is formed by a cover member having an inverted U-shaped cross-section and a cross member.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in a vehicle seat such as that of Patent Document 1, in order to increase the rigidity of the seat support, the left and right cover members and the cross member are assembled to the left and right front leg portions and the left and right rear leg portions. In this configuration, the number of components increases, and the seat support becomes larger and heavier. 。

[0006] This An object of the invention is to provide a vehicle seat provided with a seat support disposed between a seat body and a vehicle body floor, capable of achieving miniaturization and weight reduction while ensuring the rigidity of the seat support. 。

Means for Solving the Problems

[0007] According to the vehicle seat of the present invention, the above problem is solved by a vehicle seat including a seat body having a seat cushion serving as a seating portion, a seat support attached to a vehicle body floor and supporting the seat cushion from below, and a seat support frame disposed between the seat cushion and the seat support in the vertical direction, extending in the front-rear direction of the seat, and supporting the seat cushion from below. The seat support includes left and right foot members attached to the vehicle body floor at intervals in the seat width direction and extending so as to protrude upward from the vehicle body floor, and a foot connection member that connects the left and right foot members and is disposed so as to partially overlap the left and right foot members in the vertical direction. A closed cross-sectional structure is formed by the foot member and the foot connection member, and the closed cross-sectional structure and a part of the seat support frame are disposed to face each other. , the seat support frame is a lower rail of a rail device that supports the seat body so as to be movable in the seat front-rear direction, and is arranged such that the closed cross-sectional structure and a part of the lower rail face each other. Among the foot connecting members, a reinforcing portion extending from the central portion toward both end portions in the seat width direction is formed on the contact surface that contacts the foot member. This solves the problem. Also, according to the vehicle seat of the present invention, the above problem is solved by a vehicle seat including a seat body having a seat cushion that serves as a seating portion, a seat support attached to the vehicle floor and supporting the seat cushion from below, and a seat support frame disposed between the seat cushion and the seat support in the vertical direction, extending in the seat front-rear direction, and supporting the seat cushion from below. The seat support includes left and right foot members attached to the vehicle floor at intervals in the seat width direction and protruding upward from the vehicle floor, and a foot connecting member that connects the left and right foot members and is disposed so as to partially overlap the left and right foot members in the vertical direction. A closed cross-sectional structure is formed by the foot member and the foot connecting member, and the closed cross-sectional structure and a part of the seat support frame are arranged to face each other. The seat support frame is a lower rail of a rail device that supports the seat body so as to be movable in the seat front-rear direction, and is arranged such that the closed cross-sectional structure and a part of the lower rail face each other. The foot connecting member has a protruding portion that protrudes outward in the seat width direction from the foot member, and the outer peripheral portion of the portion where the side wall portion of the foot member and the protruding portion of the foot connecting member are in contact in the vertical direction is welded. Further, according to the vehicle seat of the present invention, the above problem is solved by a vehicle seat including: a seat body having a seat cushion serving as a seating portion; a seat support attached to a vehicle body floor and supporting the seat cushion from below; and a seat support frame disposed between the seat cushion and the seat support in the vertical direction, extending in the seat front-rear direction, and supporting the seat cushion from below. The seat support is attached to the vehicle body floor at intervals in the seat width direction, and includes left and right foot members extending upward from the vehicle body floor. The seat support also includes a foot connection member that connects the left and right foot members and is disposed so as to partially overlap the left and right foot members in the vertical direction. A closed cross-sectional structure is formed by the foot members and the foot connection member. The closed cross-sectional structure and a part of the seat support frame are disposed to face each other. The seat support frame is a lower rail of a rail device that supports the seat body movably in the seat front-rear direction, and the closed cross-sectional structure and a part of the lower rail are disposed to face each other. The seat support includes a front foot member and a rear foot member as the foot members attached to the vehicle body floor at intervals in the seat front-rear direction. The foot connection member connects the left and right front foot members. A reinforcing foot member is attached to the rear foot member on the side where a belt anchor for locking a seat belt is disposed among the left and right rear foot members, at a position facing the rear foot member in the vertical direction or the seat front-rear direction. A closed cross-sectional structure is formed by the rear foot member and the reinforcing foot member. Further, according to the vehicle seat of the present invention, the above problem is solved by a vehicle seat comprising: a seat body having a seat cushion serving as a seating portion; a seat support attached to a vehicle body floor and supporting the seat cushion from below; and a seat support frame disposed between the seat cushion and the seat support in the vertical direction, extending in the seat front-rear direction, and supporting the seat cushion from below. The seat support includes left and right foot members attached to the vehicle body floor at intervals in the seat width direction and protruding upward from the vehicle body floor, and a foot connection member that connects the left and right foot members and is disposed so as to partially overlap the left and right foot members in the vertical direction. A closed cross-sectional structure is formed by the foot member and the foot connection member, and the closed cross-sectional structure and a part of the seat support frame are disposed to face each other. The seat support frame is a lower rail of a rail device that supports the seat body so as to be movable in the seat front-rear direction, and the closed cross-sectional structure and a part of the lower rail are disposed to face each other. A second reinforcing portion is provided on the surface of the foot connection member. The closed cross-sectional structure is formed by the first opposing wall portion in the foot member, the left and right first side wall portions, and the upper wall portion of the foot connection member overlapping in the vertical direction. A second closed cross-sectional structure is formed by the second opposing wall portion in the foot member, the left and right second side wall portions, and the front wall portion of the foot connection member overlapping in the seat front-rear direction. The second reinforcing portion is provided at a portion of the surface of the foot connection member that is located between the portion where the closed cross-sectional structure is formed and the portion where the second closed cross-sectional structure is formed.

[0008] At this time, BeforeAt the rear end of the seat of the foot connecting member, both end portions in the seat width direction are formed so as to protrude rearward of the seat more than the central portion in the seat width direction, and it is preferable that the reinforcing portion extends in the seat width direction along the rear end of the seat of the foot connecting member. Further, by welding the outer peripheral portion of the portion where the foot member and the foot connecting member are in contact, a welding mark is formed on at least one of the foot member and the foot connecting member, and it is preferable that the welding mark and the reinforcing portion are arranged at positions aligned in the seat width direction. Further, it is preferable that the welding mark is provided at a portion where the closed cross-sectional structure and the seat support frame face each other. Further, the seat support frame is a lower rail of a rail device that supports the seat body so as to be movable in the seat front-rear direction, and is arranged such that the closed cross-sectional structure and a part of the lower rail face each other. The foot connecting member has an overhanging portion that protrudes outward in the seat width direction from the foot member, and it is preferable that the outer peripheral portion of the portion where the side wall portion of the foot member and the overhanging portion of the foot connecting member are in contact in the vertical direction is welded. Further, the seat support frame is a lower rail of a rail device that supports the seat body so as to be movable in the seat front-rear direction, and is arranged such that the closed cross-sectional structure and a part of the lower rail face each other. The seat support has a front foot member and a rear foot member as the foot members that are attached to the vehicle body floor at intervals in the seat front-rear direction. The foot connecting member connects the left and right front foot members, and a reinforcing foot member is attached to the rear foot member on the side where the belt anchor for locking the seat belt is arranged among the left and right rear foot members at a position facing the rear foot member in the vertical direction or the seat front-rear direction, and it is preferable that a closed cross-sectional structure is formed by the rear foot member and the reinforcing foot member. Also, The vehicle seat includes a seat body having the seat cushion and the seat back, a reclining device rotatably connecting the seat back to the seat cushion, and a height link device connecting the seat body to the vehicle body floor so as to be movable up and down. The seat cushion has a cushion frame serving as a skeleton, a cushion pad, and a skin material covering the cushion frame and the cushion pad. The seat back has a back frame serving as a skeleton, a cushion pad, and a skin material covering the back frame and the cushion pad. A belt anchor for locking a seat belt is provided at a position outside the seat width direction from the seat cushion. is preferable 。

Advantages of the Invention

[0015] According to the present invention, it is possible to realize a vehicle seat capable of reducing the size and weight compared to the conventional one while ensuring the rigidity (assembly rigidity) of the seat support. 。

Brief Description of the Drawings

[0016]

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Mode for Carrying Out the Invention

[0017] Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 - 8A, B. This embodiment is a vehicle seat provided with a seat support attached between a seat body and a vehicle body floor. The seat support is attached to the vehicle body floor at intervals in the seat width direction, and has left and right foot members extending upward from the vehicle body floor so as to protrude. It also has a foot connection member that connects the upper portions of the left and right foot members and is arranged so as to partially overlap the left and right foot members in the vertical direction and the seat front - rear direction. The foot member has an opposing wall portion arranged at a position opposing the foot connection member in the vertical direction and the seat front - rear direction, and left and right side wall portions that continuously bend from both end portions in the seat width direction of the opposing wall portion and protrude so as to abut against the foot connection member. The invention relates to a vehicle seat characterized in that a closed cross - sectional structure is formed by the opposing wall portion, the left and right side wall portions, and the foot connection member in the foot member. Note that the side where the occupant sits with respect to the seat back of the vehicle seat is the front side of the seat.

[0018] The vehicle seat S of this embodiment is used, for example, as a front seat of an automobile. As shown in FIG. 1, the vehicle seat S mainly includes a seat body including a seat cushion 1 and a seat back 2, a reclining device 30 that rotatably connects the seat back 2 to the seat cushion 1 as shown in FIG. 2, a height link device 40 that connects the seat body to the vehicle floor so as to be movable up and down, and a rail device 50 that supports the seat body so as to be movable back and forth with respect to the vehicle floor. Further, as shown in FIGS. 1 and 2, the vehicle seat S further includes a seat support 60 that is attached on the vehicle floor and supports the seat body from below. Specifically, the seat support 60 is disposed between the rail device 50 and the vehicle floor in the vertical direction.

[0019] As shown in FIG. 1, the seat cushion 1 is a seating portion that supports an occupant from below. A cushion pad 1a is placed on a cushion frame 10 shown in FIG. 2 serving as a skeleton, and is covered with a skin material 1b from above the cushion pad 1a. The seat back 2 is a backrest portion that supports the occupant's back from behind. A cushion pad 2a is placed on a back frame 20 shown in FIG. 2 serving as a skeleton, and is covered with a skin material 2b. Note that, as shown in FIG. 2, a belt anchor 3 for locking a seat belt is attached outside the seat cushion 1 in the seat width direction.

[0020] As shown in FIGS. 2 to 4, the cushion frame 10 is formed of a substantially rectangular frame body, and mainly includes side frames 11 disposed on the left and right sides, a plate-shaped pan frame 12 that connects the front portions of the side frames 11, a pipe-shaped rear connection frame 13 that connects the rear portions of the side frames 11, a plurality of elastic springs 14 that are respectively hooked on the pan frame 12 and the rear connection frame 13 and extend in a serpentine shape, and a pipe-shaped reinforcement connection frame 15 that connects the rear portions of the side frames 11 behind the rear connection frame 13. The side frame 11 is a sheet metal member that extends in the front-rear direction of the seat and has a substantially I-shaped longitudinal cross-section. A reclining device 30 is attached to the rear portion thereof, and a rail device 50 is attached to the lower portion thereof via a height link device 40.

[0021] As shown in FIGS. 2 to 4, the back frame 20 is composed of a substantially rectangular frame body, and includes back side frames 21 disposed on the left and right sides, an inverted U-shaped upper frame 22 that connects the upper end portions of the respective back side frames 21, a plate-shaped lower frame 23 that connects the lower end portions of the respective back side frames 21, a plurality of elastic springs 24 that are respectively hooked to the upper frame 22 and the lower frame 23 and extend in the vertical direction, and a plate-shaped frame 25 that is supported by the elastic springs 24. The back side frame 21 is a sheet metal member that extends in the vertical direction and has a substantially U-shaped cross-section. The lower end portion thereof is connected to the rear end portion of the side frame 11 via an attachment bracket 26 and a reclining device 30. In such a state, the back frame 20 can rotate relative to the cushion frame 10.

[0022] As shown in FIGS. 2 and 4, the reclining device 30 can be switched between a locked state in which the rotational movement of the back frame 20 is locked and an unlocked state. From the state where the back frame 20 is locked in a predetermined upright posture, the locked state is released by operating a reclining operation lever (not shown), and the upright posture of the back frame 20 can be adjusted. Specifically, the reclining device 30 mainly includes a back rotation shaft 31 and a spiral spring 32 that biases the back frame 20 to rotate forward about the back rotation shaft 31. The back rotation shaft 31 is pivotally 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, respectively. The spiral spring 32 is configured such that one end thereof is locked to a spring locking bracket 33 attached to the outer surface of the backside frame 21, and the other end is locked to a spring locking member 34 attached to the outer surface of the side frame 11.

[0023] As shown in FIG. 2, the height link device 40 is attached between the cushion frame 10 and the rail device 50, and includes left and right front links 41 disposed on the front side of the seat and left and right rear links 42 disposed on the rear side of the seat. The rear link 42 serves as a drive link to adjust the height of the seat body. In the connecting portion of the right rear link 42 on the side of the cushion frame 10 (side frame 11), a sector gear portion 42a as a gear is formed on a part of the outer peripheral portion thereof, and meshes with a pinion gear provided in a brake unit (not shown).

[0024] Also, as shown in FIG. 2, the height link device 40 includes a brake rotation shaft 43 pivotally supported on the side surface of the side frame 11 in the seat width direction and protruding outward, a brake unit (not shown) that is rotatably attached via the brake rotation shaft 43 and regulates the lifting operation of the seat body, and a height operation lever (not shown) that is rotatably attached via the brake rotation shaft 43 and the brake unit and raises and lowers the seat body. The brake unit is attached to the outer surface of the side frame 11.

[0025] In the above configuration, when a height operation lever (not shown) is operated, the pinion gear rotates integrally with the brake rotation shaft 43, and the meshing position between the pinion gear and the sector gear portion 42a changes. Further, the right rear link 42 formed with the sector gear portion 42a rotates, and the left rear link 42 and the left and right front links 41 also rotate following the right rear link 42. As a result, the seat body moves up and down, and the seat height is adjusted.

[0026] As shown in Fig. 2, the rail device 50 mainly includes left and right lower rails 51 fixed to the upper surface of the seat support 60 and extending in the front-rear direction of the seat, left and right upper rails 52 slidably supported along the lower rails 51, a locking member (not shown) for locking the upper rails 52 immovably, and a rail operation lever 53 for releasing the locked state of the locking member. The upper rail 52 is a long member that slides along the lower rail 51 while being inserted into the accommodation space of the lower rail 51, and its upper end portion is connected to the cushion frame 10 side via a connecting bracket 54. The connecting bracket 54 is a sheet metal member having a vertical cross-sectional L shape extending in the front-rear direction of the seat, and is a member that connects the upper rail 52 and the links 41 and 42 on the cushion frame 10 side in the vertical direction. In addition, a belt anchor 3 for locking the seat belt is attached to the left connecting bracket 54 on the side different from the right rear link 42 (driving link) among the left and right connecting brackets 54.

[0027] As shown in Figs. 2 and 5, the seat support 60 is a member for raising the seat surface position of the seat body to a predetermined height position. Specifically, it includes left and right front foot members 61 and left and right rear foot members 62 that are spaced apart in the seat width direction on the vehicle body floor and extend upward from the vehicle body floor, a foot connecting member 63 that connects the upper portions of the left and right front foot members 61, and a reinforcing foot member 64 that is attached to the left rear foot member 62 and is disposed at a position facing the rear foot member 62 in the vertical direction. Note that the reinforcing foot member 64 is attached to the left rear foot member 62 on the side where the belt anchor 3 is disposed among the left and right rear foot members 62.

[0028] As shown in FIGS. 5-7, the front foot member 61 is a member having a substantially U-shaped cross section that is long in the vertical direction for attachment to the vehicle body floor. The upper portion thereof is sandwiched between the lower rail 51 and the foot connection member 63 in the vertical direction, and the lower portion thereof is disposed in contact with the vehicle body floor surface. Note that the rear foot member 62 has the same configuration as the front foot member 61, and the front foot member 61 and the rear foot member 62 are arranged to be symmetric with respect to the front and rear with the seat body as the center.

[0029] The front foot member 61 extends while inclining toward the rear side of the seat from its lower portion toward its upper portion, and a first opposing wall portion 61a disposed at a position facing the foot connection member 63 in the vertical direction at the upper end portion thereof, and the left and right first side wall portions 61b that are continuously bent downward from both left and right end portions of the first opposing wall portion 61a and project so as to abut against the foot connection member 63. Further, the front foot member 61 has a second opposing wall portion 61c that extends in the vertical direction and is disposed at a position facing the foot connection member 63 in the front-rear direction of the seat, and left and right second side wall portions 61d that are continuously bent rearward from both left and right end portions of the second opposing wall portion 61c and project so as to abut against the foot connection member 63. The first opposing wall portion 61a is a wall portion that extends in the front-rear direction of the seat and has a horizontal plane, and the second opposing wall portion 61c is a wall portion that extends while inclining toward the front side of the seat with respect to the vertical direction and has an inclined plane, and the first opposing wall portion 61a and the second opposing wall portion 61c are continuously formed.

[0030] A rail attachment portion 61e for attaching the front portion of the lower rail 51 is formed on the upper surface of the first opposing wall portion 61a, and a floor attachment portion 61f for attaching to the vehicle body floor is formed on the inclined plane of the second opposing wall portion 61c. The rail attachment portion 61e has an attachment hole penetrating in the vertical direction and is connected to the lower rail 51 using fastening bolts and fastening nuts (not shown). The floor attachment portion 61f also has an attachment hole penetrating the second opposing wall portion 61c and is attached to the vehicle body floor using fastening bolts or the like (not shown). Note that the floor attachment portion 61f is formed on a recessed portion (reinforcing recess) that is recessed one step more than the inclined plane of the second opposing wall portion 61c in order to enhance the attachment rigidity to the vehicle body floor.

[0031] As shown in FIGS. 5 - 7, the foot connection member 63 is a reinforcing member having a substantially L-shaped longitudinal cross section that is long in the seat width direction for connecting the left and right front foot members 61, and is arranged so as to partially overlap the left and right front foot members 61 in the vertical direction and the seat front-rear direction. Specifically, the foot connection member 63 includes an upper wall portion 63a disposed at a position facing the first opposing wall portion 61a of the front foot member 61, a front wall portion 63b that bends downward and protrudes continuously from the front end portion of the upper wall portion 63a and is disposed at a position facing the second opposing wall portion 61c, and a bottom wall portion 63c that bends rearward and protrudes continuously from the lower end portion of the front wall portion 63b.

[0032] The upper wall portion 63a and the front wall portion 63b are each formed such that both end portions in the seat width direction are wider than the central portion, and both end portions of each are attached to the front foot member 61 by welding. Specifically, both end portions in the seat width direction are formed to protrude rearward of the seat from the central portion at the rear end of the upper wall portion 63a in the seat width direction, and both end portions in the seat width direction are formed to protrude downward from the central portion at the lower end of the front wall portion 63b.

[0033] On the upper surface of the upper wall portion 63a that abuts against the front foot member 61 (the first opposing wall portion 61a), left and right reinforcing beads 63d (reinforcing portions) extending from the central portion toward both end portions in the seat width direction are formed. The reinforcing beads 63d extend while meandering in the seat width direction along the rear end of the upper wall portion 63a in the seat width direction. In addition, the outer peripheral portion of the upper wall portion 63a where it contacts the front foot member 61 (the left and right first side wall portions 61b) is welded, so that a first weld mark 63e is formed on the outer peripheral portion (at least one portion of the upper wall portion 63a and the front foot member 61). In the above, the reinforcing bead 63d and the first weld mark 63e are arranged at positions side by side in the sheet width direction. In addition, also in the front wall portion 63b, the outer peripheral portion of the portion where it contacts the front foot member 61 (the left and right second side wall portions 61d) is welded, so that a second weld mark 63f is formed on the outer peripheral portion (at least one portion of the front wall portion 63b and the front foot member 61).

[0034] In the above configuration, as shown in FIGS. 7 and 8A, the first opposing wall portion 61a in the front foot member 61, the left and right first side wall portions 61b, and the upper wall portion 63a in the foot connecting member 63 overlap in the vertical direction, thereby forming a closed cross-section structure (first closed cross-section structure). Also, as shown in FIGS. 7 and 8B, the second opposing wall portion 61c in the front foot member 61, the left and right second side wall portions 61d, and the front wall portion 63b in the foot connecting member 63 overlap in the sheet front-rear direction, thereby forming a second closed cross-section structure. Therefore, although the configuration is simple, the rigidity of the seat support 60 can be improved.

[0035] Also in the above configuration, as shown in FIG. 5, the rear foot member 62 having a reverse U-shaped cross-section and the reinforcing foot member 64 having a U-shaped cross-section overlap, thereby forming an intermediate structure. Specifically, the first opposing wall portion 62a in the rear foot member 62, the left and right first side wall portions 62b, and the reinforcing foot member 64 overlap in the vertical direction, thereby forming a closed cross-section structure (third closed cross-section structure). Also, the second opposing wall portion 62c in the rear foot member 62, the left and right second side wall portions 62d, and the reinforcing foot member 64 overlap in the sheet front-rear direction, thereby forming a fourth closed cross-section structure. Furthermore, the third closed cross-section structure and the fourth closed cross-section structure are continuously formed. Therefore, the rigidity of the seat support 60 can be further improved.

[0036] Also, in the above configuration, as shown in FIG. 5, the upper surface portion where the lower rail 51 is attached and the bottom surface portion where the foot connecting member is attached in the front foot member 61 are arranged at positions overlapping in the vertical direction. By using the existing component (lower rail 51) as described above, it is possible to achieve an improvement in the assembly rigidity of the seat support 60 without increasing the number of components of the seat support 60.

[0037] Also, in the above configuration, as shown in FIG. 5, the foot connecting member 63 has an overhanging portion 63g that protrudes outward in the seat width direction from the front foot member 61, and the outer peripheral portion of the portion where the overhanging portion 63g and the side wall portions 61b, 61d of the front foot member 61 are in contact with each other in the vertical direction is welded. Since the foot connecting member 63 has the overhanging portion 63g (remaining margin) as described above, it is possible to absorb the dimensional variations of the foot connecting member 63 when assembling the front foot member 61 and the foot connecting member 63, leading to uniform quality.

[0038] <Details of the Reinforcing Connecting Frame> As shown in FIGS. 2 to 4, the reinforcing connecting frame 15 is a connecting pipe that reinforces the rear portion of the cushion frame 10. Specifically, it is provided as a reinforcing structure for coping with side impact loads from the outside. The reinforcing connecting frame 15 is arranged behind and below the rear connecting frame 13, and extends to connect the left and right side frames 11 in a state of being in contact with the cutout portions 11a formed at the lower ends of the left and right side frames 11. Specifically, the outer peripheral portion of the portion where the reinforcing connecting frame 15 and the cutout portion 11a are in contact is welded, and thus a welding mark 15a is formed on the outer peripheral portion.

[0039] With the above configuration, conventionally, since the reinforcing connection frame 15 was connected so as to penetrate the side surfaces of the left and right side frames 11, in order to secure the mounting space for the reinforcing connection frame 15, the side frames 11 had become large in the front-rear direction and the up-down direction of the seat (for example, refer to Japanese Patent Application Laid-Open No. 2012-66800). According to the present invention, it has been realized that an increase in the size of the seat (an increase in the size of the cushion frame 10) can be suppressed.

[0040] Also, in the above configuration, as shown in FIG. 3, a reinforcing portion 11b (reinforcing flange) that protrudes toward one side (inner side) in the seat width direction is formed at the lower end of the side frame 11. Therefore, the assembling rigidity of the side frame 11 and the reinforcing connection frame 15 can be enhanced.

[0041] Also, in the above configuration, as shown in FIG. 3, the reinforcing connection frame 15 has a protruding portion 15b that protrudes outward in the seat width direction from the left and right side frames 11. Therefore, not only the rigidity of the reinforcing connection frame 15 is increased, but also since the reinforcing connection frame 15 has a remaining margin, when connecting the left and right side frames 11, variations in the dimensions of the reinforcing connection frame 15 can be absorbed, leading to uniform quality.

[0042] <Second Embodiment of Vehicle Seat> Next, a second embodiment of the vehicle seat will be described with reference to FIGS. 9 - 14. Note that descriptions of the content overlapping with the above-described vehicle seat S will be omitted. In the vehicle seat S2 of the second embodiment, a seat support 160 is provided instead of the seat support 60.

[0043] The seat support 160 is mainly composed of left and right front foot members 161, left and right rear foot members 162, a foot connection member 163 that connects the upper parts of the left and right front foot members 161, and a reinforcing foot member 164 that is attached to the left rear foot member 162 and is arranged at a position facing the rear foot member 62 in the vertical direction.

[0044] As shown in FIGS. 9 - 12, the front foot member 161 has a first opposing wall portion 161a, left and right first side wall portions 161b, a second opposing wall portion 161c, and left and right second side wall portions 161d. A rail attachment portion 161e is formed on the upper surface of the first opposing wall portion 161a, and a floor attachment portion 161f is formed on the inclined plane of the second opposing wall portion 161c.

[0045] The foot connection member 163 has an upper wall portion 163a, a front wall portion 163b, and a bottom wall portion 163c that continuously bends backward and protrudes from the lower end portion of the front wall portion 163b.

[0046] On the upper surface of the upper wall portion 163a that abuts against the front foot member 161, a first reinforcing bead 163d (reinforcing portion) extending in the sheet width direction is formed. Also, on the curved surface of the front wall portion 163b that abuts against the front foot member 161, left and right second reinforcing beads 163h extending from the central portion toward both end portions in the sheet width direction are formed. As shown in FIGS. 10 - 12, a through hole 163i is formed on the upper surface of the upper wall portion 163a at a position facing the rail attachment portion 161e. The through hole 163i is a hole that penetrates in the vertical direction and functions as a tool hole when fastening the lower rail 51 and the front foot member 161 using fastening bolts and fastening nuts (not shown).

[0047] On both end portions in the sheet width direction of the upper wall portion 163a and the front wall portion 163b, left and right bent portions 163j that continuously bend downward and protrude from the both end portions are formed. Further, at substantially the center of the extending direction of the bent portion 163j, a notch portion 163k that is notched toward the inside in the sheet width direction is formed. By forming the notch portion 163k, the bent portion 163j is divided into two in the sheet front-rear direction, and a space is formed between the two divided bent portions 163j.

[0048] In the above configuration, as shown in FIGS. 10-12, a through hole 163i is formed at a position facing the rail attachment portion 161e on the upper surface of the upper wall portion 163a of the foot connecting member 163. Therefore, it is possible to improve the workability of assembling with the lower rail 51 while suppressing a decrease in rigidity due to the formation of the through hole 163i.

[0049] Also in the above configuration, as shown in FIGS. 10-12, the first reinforcing bead 163d is formed at a position overlapping the through hole 163i in the sheet width direction. Therefore, the peripheral portion of the through hole 163i can be reinforced by the first reinforcing bead 163d, and a decrease in the rigidity of the seat support 160 can be suppressed.

[0050] Also in the above configuration, as shown in FIGS. 9-11, left and right bent portions 163j that are bent and protrude on the opposite side to the front foot member 161 side are formed at both ends in the sheet width direction of the upper wall portion 163a and the front wall portion 163b. Therefore, it is possible to improve the rigidity while suppressing an increase in the size of the seat support 160 in the sheet width direction.

[0051] Also in the above configuration, as shown in FIGS. 11 and 12, the bent portion 163j is formed at a position overlapping the through hole 163i in the sheet width direction. Therefore, the peripheral portion of the through hole 163i can be reinforced by the bent portion 163j, and a decrease in the rigidity of the seat support 160 can be suppressed.

[0052] Also, in the above configuration, as shown in FIGS. 10 to 12, the front foot member 161 and the foot connecting member 163 are welded to each other, thereby forming a first weld mark 163e and a second weld mark 163f. At this time, the first weld mark 163e is formed at a position overlapping the through hole 163i in the sheet width direction. Therefore, the peripheral portion of the through hole 163i can be reinforced by the welding (weld bead), and a decrease in the rigidity of the seat support 160 can be suppressed.

[0053] Also, in the above configuration, as shown in FIGS. 9 and 10, on the curved surface of the front wall portion 163b that abuts on the front foot member 161, left and right second reinforcing beads 163h are formed. Specifically, the second reinforcing bead 163h is formed as a reinforcing recess that is recessed on the side opposite to the front foot member 161 side. Therefore, it is possible to easily form the mating surface of the foot connecting member 163 and the front foot member 161, and it is possible to increase the rigidity of the seat support 160.

[0054] Also, in the above configuration, as shown in FIGS. 11 and 12, the outer end portion of the second reinforcing bead 163h is formed at a position overlapping the through hole 163i in the sheet front-rear direction. Therefore, the peripheral portion of the through hole 163i can be reinforced by the second reinforcing bead 163h, and a decrease in the rigidity of the seat support 160 can be suppressed.

[0055] Also, in the above configuration, as shown in FIG. 9, where the bent portion 163j extends along the outer end portion of the front foot member 161, a notch portion 163k is formed at a substantially central portion in the extending direction of the bent portion 163j. By providing the notch portion 163k in this way, it becomes easier to form the bent portion 163j. That is, it becomes easy to form the bent portion 163j so as not to protrude outward in the sheet width direction.

[0056] Also, in the above configuration, as shown in FIGS. 9 and 12, the second reinforcing bead 163h is formed at a position (aligned position) overlapping the notch 163k in the sheet width direction. Therefore, the peripheral portion of the notch 163k can be reinforced by the second reinforcing bead 163h, and a decrease in the rigidity of the seat support 160 can be suppressed.

[0057] Also, in the above configuration, as shown in FIG. 9, the through hole 163i and the notch 163k are arranged at different positions in the sheet width direction and the sheet front-rear direction. Therefore, it is possible to suppress a decrease in the rigidity of the seat support 160 due to the formation of the through hole 163i and the notch 163k.

[0058] Also, in the above configuration, as shown in FIG. 12, the outer end portion of the bottom wall portion 163c of the foot connecting member 163 is arranged at a position overlapping the through hole 163i in the sheet front-rear direction. Therefore, the peripheral portion of the through hole 163i can be reinforced by the bottom wall portion 163c, and a decrease in the rigidity of the seat support 160 can be suppressed.

[0059] Also, in the above configuration, as shown in FIG. 12, the outer end portion of the first reinforcing bead 163d and the inner end portion of the second reinforcing bead 163h are arranged at positions overlapping in the sheet front-rear direction. By arranging the reinforcing beads overlapping each other in this way, the rigidity of the seat support 160 (foot connecting member 163) can be improved.

[0060] Also, in the above configuration, as shown in FIGS. 13 and 14, a through hole 164i is formed at a position of the reinforcing foot member 164 that faces the rail mounting portion 162e provided on the rear foot member 162. Therefore, the workability of assembling with the lower rail 51 can be improved.

[0061] <Third Embodiment of Vehicle Seat> Next, a third embodiment of the vehicle seat will be described with reference to FIG. 15. In the vehicle seat S3 of the third embodiment, a seat support 260 is provided instead of the seat support 60. The seat support 260 includes left and right front foot members 261, a central front foot member 265 disposed between the left and right front foot members 261, and a foot connecting member 263 that connects upper portions of the left and right front foot members 261 and the central front foot member 265.

[0062] The central front foot member 265 has the same shape as the right front foot member 261 and is attached to the foot connecting member 263 in the same manner as the left and right front foot members 261. With the above configuration, the seat support 260 can be more firmly fixed to the vehicle body floor. Also, with the above configuration, for example, a method of fixing only the central front foot member 265 among the left and right front foot members 261 and the central front foot member 265 to the vehicle body floor is conceivable. In that case, the workability of attaching the seat support 260 can be improved.

[0063] <Fourth Embodiment of Vehicle Seat> Next, a fourth embodiment of the vehicle seat will be described with reference to FIG. 16. In the vehicle seat S4 of the fourth embodiment, a seat support 360 is provided instead of the seat support 60. The seat support 360 includes left and right front foot members 361, a foot connecting member 363 that connects upper portions of the left and right front foot members 361, and a regulating member 365 that is attached to the front surface of the foot connecting member 363 and is disposed between the left and right front foot members 361.

[0064] The regulating member 365 is a substantially U-shaped wire member for regulating the intrusion of fallen objects, foreign objects, etc. that have fallen below the seat. The regulating member 365 extends downward from the central portion in the seat width direction of the foot connecting member 363 toward the vehicle body floor side. With the above configuration, it is possible to regulate the entry of the above-mentioned dropped objects, foreign matters, etc. into the inside of the seat. Further, it is also possible to regulate the storage items from jumping out of the seat from the storage space provided below the seat to the outside of the seat. Note that the regulating member 365 is not particularly limited to the wire member and can be changed. For example, it may be a plate-shaped member or the like. When a plate-shaped member is adopted as the regulating member 365, it is preferable to form a plurality of holes on the side surface of the plate-shaped member, and the weight can be reduced.

[0065] <Fifth Embodiment of Vehicle Seat> Next, a fifth embodiment of the vehicle seat will be described with reference to FIG. 17. In the vehicle seat S5 of the fifth embodiment, a seat support 460 is provided instead of the seat support 60. The seat support 460 includes left and right front foot members 461, left and right rear foot members 462, a foot connecting member 463 that connects the upper portions of the left and right front foot members 461, and a second foot connecting member 465 that connects the upper portions of the front foot member 461 and the rear foot member 462.

[0066] The second foot connecting member 465 is a plate-shaped member that is long in the front-rear direction of the seat, and is attached to the outer surfaces of the front foot member 461 and the rear foot member 462 by welding. A plurality of through holes 465a are formed on the outer surface of the second foot connecting member 465 at a predetermined interval in the front-rear direction of the seat. With the above configuration, the rigidity of the seat support 460 can be improved. In addition, by forming a plurality of through holes 465a as described above, the weight of the seat support 460 can be reduced. Note that the second foot connecting member 465 is not particularly limited to a plate-shaped member, and may be a pipe member or a wire member.

[0067] <Sixth Embodiment of Vehicle Seat> Next, a sixth embodiment of the vehicle seat will be described with reference to FIG. 18. In the vehicle seat S6 of the sixth embodiment, a seat support 560 is provided instead of the seat support 60. The seat support 560 includes left and right front foot members 561 and a foot connecting member 563 that connects upper portions of the left and right front foot members 561.

[0068] The foot connecting member 563 has a first foot connecting portion 563a in the shape of an angle pipe that connects first opposing wall portions 561a of the left and right front foot members 561, and a second foot connecting portion 563b in the shape of an angle pipe that connects second opposing wall portions 561c of the left and right front foot members 561. The first foot connecting portion 563a and the second foot connecting portion 563b are each attached to the front foot member 561 by welding. With the above configuration, the rigidity of the seat support 560 can be increased by a simple shape. Note that the first foot connecting portion 563a and the second foot connecting portion 563b have an angle pipe shape, but are not particularly limited and may have, for example, a round pipe shape.

[0069] <Seventh Embodiment of Vehicle Seat> Next, a seventh embodiment of the vehicle seat will be described with reference to FIG. 19. In the vehicle seat S7 of the seventh embodiment, a seat support 660 is provided instead of the seat support 60. The seat support 660 includes left and right rear foot members 662 and a rear foot connecting member 665 that connects upper portions of the left and right rear foot members 662. The rear foot connecting member 665 has the same shape as the foot connecting member 163 of the second embodiment, and connects the left and right rear foot members 662 in the same manner as the foot connecting member 163. With the above configuration, the rigidity of the seat support 660 can be increased.

[0070] <Other Embodiments> In the above-described embodiment, as shown in FIG. 2, the vehicle seat S is configured to include a height link device 40 and a rail device 50, but this is not necessarily required. For example, a seat support 60 fixed to the vehicle body floor and the cushion frame 10 may be directly connected to each other.

[0071] In the above-described embodiment, as shown in FIG. 5, the upper portion of the front foot member 61 is disposed at a position facing the foot connecting member 63 in the vertical direction and the front-rear direction of the seat. However, it is not particularly limited and can be changed. For example, it may be disposed at a position facing the foot connecting member 63 only in the vertical direction, or may be disposed at a position facing the foot connecting member 63 only in the front-rear direction of the seat.

[0072] In the above-described embodiment, as shown in FIG. 5, the front foot member 61 extends while inclining toward the rear side of the seat from its lower portion to its upper portion. However, it is not particularly limited. For example, it may extend while inclining toward the inner or outer side in the seat width direction from its lower portion to its upper portion. In such a case, it is desirable that the front foot member 61 has an opposing wall portion disposed at a position facing the foot connecting member 63 in the vertical direction and the seat width direction, and front and rear side wall portions that are continuously bent from both end portions in the front-rear direction of the opposing wall portion and project so as to abut against the foot connecting member 63.

[0073] In the above-described embodiment, as shown in FIG. 5, the foot connecting member 63 is disposed at a position lower than the left and right front foot members 61 and connects the left and right front foot members 61. However, it is not particularly limited. For example, it may be disposed at a position higher than the left and right front foot members. In such a case, it is desirable that the foot connecting member 63 is disposed sandwiched between the lower rail 51 and the left and right front foot members in the vertical direction.

[0074] In the above embodiment, as a specific example, the vehicle seat used in an automobile has been described. However, it is not particularly limited, and in addition to vehicle seats for automobiles, trains, buses, etc., it can also be used as vehicle seats for airplanes, ships, etc.

[0075] In this 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 changed and improved without departing from its gist, and it goes without saying that equivalents of the present invention are included therein. In particular, regarding the arrangement and configuration of the seat support, those described in the above embodiment are merely examples and do not limit the present invention.

Explanation of Reference Numerals

[0076] S, S2, S3, S4, S5, S6, S7 Vehicle seat 1 Seat cushion 1a, 2a Cushion pad 1b, 2b Skin material 2 Seat back 3 Belt anchor 10 Cushion frame 11 Side frame 11a Notch 11b Reinforcing part (reinforcing flange) 12 Pan frame 13 Rear connecting frame 14 Elastic spring 15 Reinforcing connecting frame 15a Weld mark 15b Protruding part 20 Back frame 21 Back side frame 22 Upper frame 23 Lower frame 24 Elastic spring 25 Plate-like frame 26 Mounting bracket 30 Reclining device 31 Back rotation shaft 32 Volute spring 33 Spring locking bracket 34 Spring locking member 40 Height link device 41 Front link 42 Rear link (drive link) 42a Sector gear part 43 Brake rotation shaft 50 Rail assembly Position 51 Lower rail (Seat support frame) 52 Upper rail 53 Rail operation lever 54 Connecting bracket 60, 160, 260, 360, 460, 560, 660 Seat support 61, 161, 261, 361, 461, 561 Front foot member (foot member) 61a, 161a, 561a First opposing wall part 61b, 161b First side wall part 61c, 161c, 561c Second opposing wall part 61d, 161d Second side wall part 61e, 161e Rail attachment part 61f, 161f Floor attachment part 62, 162, 462, 662 Rear foot member 62a First opposing wall part 62b First side wall part 62c Second opposing wall part 62d Second side wall part 162e Rail attachment part 63, 163, 263, 363, 463, 563 Foot connecting member 63a, 163a Upper wall part 63b, 163b Front wall part 63c, 163c Bottom wall part 63d, 163d Reinforcing bead, first reinforcing bead (reinforcing part) 63e, 163e First weld mark 63f, 163f Second weld mark 63g, 163g projecting part 163h second reinforcing bead (second reinforcing part) 163i through-hole 163j bent part 163k notch 563a first foot connecting part 563b second foot connecting part 64, 164 reinforcing foot member 164i through-hole 265 central front foot member 365 regulating member 465 second foot connecting member 465a through-hole 665 rear foot connecting member

Claims

1. A seat body having a seat cushion serving as a seating portion, a seat support attached to a vehicle body floor and supporting the seat cushion from below, a vehicle seat comprising a seat support frame disposed between the seat cushion and the seat support in the vertical direction, extending in the seat front-rear direction, and supporting the seat cushion from below, wherein the seat support has left and right foot members attached to the vehicle body floor at intervals in the seat width direction and extending so as to protrude upward from the vehicle body floor, and a foot connecting member that connects the left and right foot members and is disposed so as to partially overlap the left and right foot members in the vertical direction, a closed cross-sectional structure is formed by the foot member and the foot connecting member, the closed cross-sectional structure and a part of the seat support frame are disposed so as to face each other, the seat support frame is a lower rail of a rail device that supports the seat body so as to be movable in the seat front-rear direction, the closed cross-sectional structure and a part of the lower rail are disposed so as to face each other, among the foot connecting members, a reinforcing portion extending from a central portion toward both end portions in the seat width direction is formed on a contact surface that contacts the foot member, and the vehicle seat is characterized in this.

2. A seat body having a seat cushion serving as a seating portion, a seat support attached to a vehicle body floor and supporting the seat cushion from below, a vehicle seat comprising a seat support frame disposed between the seat cushion and the seat support in the vertical direction, extending in the seat front-rear direction, and supporting the seat cushion from below, wherein the seat support has left and right foot members attached to the vehicle body floor at intervals in the seat width direction and extending so as to protrude upward from the vehicle body floor, and a foot connecting member that connects the left and right foot members and is disposed so as to partially overlap the left and right foot members in the vertical direction, a closed cross-sectional structure is formed by the foot member and the foot connecting member, the closed cross-sectional structure and a part of the seat support frame are disposed so as to face each other, the seat support frame is a lower rail of a rail device that supports the seat body so as to be movable in the seat front-rear direction, The closed cross-section structure and a part of the lower rail are arranged to face each other. The foot connecting member has a projecting portion that projects outward in the seat width direction from the foot member. A vehicle seat, characterized in that an outer peripheral portion of a portion where a side wall portion of the foot member and the projecting portion of the foot connecting member are in contact with each other in the vertical direction is welded.

3. A seat body having a seat cushion serving as a seating portion, A seat support attached to the vehicle floor and supporting the seat cushion from below, A vehicle seat including a seat support frame disposed between the seat cushion and the seat support in the vertical direction, extending in the seat front-rear direction, and supporting the seat cushion from below. The seat support includes Left and right foot members attached to the vehicle floor at intervals in the seat width direction and extending so as to project upward from the vehicle floor, A foot connecting member that connects the left and right foot members and is disposed so as to partially overlap the left and right foot members in the vertical direction. A closed cross-section structure is formed by the foot member and the foot connecting member, The closed cross-section structure and a part of the seat support frame are arranged to face each other, The seat support frame is a lower rail of a rail device that supports the seat body so as to be movable in the seat front-rear direction, The closed cross-section structure and a part of the lower rail are arranged to face each other, The seat support includes a front foot member and a rear foot member as the foot members attached to the vehicle floor at intervals in the seat front-rear direction, The foot connecting member connects the left and right front foot members, A reinforcing foot member is attached to the rear foot member on the side where a belt anchor for locking a seat belt is disposed among the left and right rear foot members at a position facing the rear foot member in the vertical direction or the seat front-rear direction. A vehicle seat, characterized in that a closed cross-section structure is formed by the rear foot member and the reinforcing foot member.

4. A seat body having a seat cushion serving as a seating portion, A seat support attached to the vehicle floor and supporting the seat cushion from below, A vehicle seat comprising a seat support frame disposed between the seat cushion and the seat support in the vertical direction, extending in the seat front-rear direction, and supporting the seat cushion from below. The seat support includes: Left and right foot members attached to the vehicle body floor at intervals in the seat width direction and extending upward from the vehicle body floor; A foot connecting member that connects the left and right foot members and is disposed so as to partially overlap the left and right foot members in the vertical direction; A closed cross-sectional structure is formed by the foot member and the foot connecting member; The closed cross-sectional structure and a part of the seat support frame are arranged to face each other; The seat support frame is a lower rail of a rail device that supports the seat body movably in the seat front-rear direction; The closed cross-sectional structure and a part of the lower rail are arranged to face each other; A second reinforcing portion is provided on the surface of the foot connecting member; The closed cross-sectional structure is formed by the first opposing wall portion in the foot member, the left and right first side wall portions, and the upper wall portion of the foot connecting member overlapping in the vertical direction; A second closed cross-sectional structure is formed by the second opposing wall portion in the foot member, the left and right second side wall portions, and the front wall portion of the foot connecting member overlapping in the seat front-rear direction; The vehicle seat according to claim 1, wherein the second reinforcing portion is provided at a portion on the surface of the foot connecting member that is located between a portion where the closed cross-sectional structure is formed and a portion where the second closed cross-sectional structure is formed.

5. Both end portions in the seat width direction at the seat rear end of the foot connecting member are formed to protrude rearward of the seat from the central portion in the seat width direction; The vehicle seat according to claim 1, wherein the reinforcing portion extends in the seat width direction along the seat rear end of the foot connecting member.

6. By welding the outer peripheral portion of the portion where the foot member and the foot connecting member are in contact, a welding mark is formed on at least one of the foot member and the foot connecting member; The vehicle seat according to claim 1 or 5, wherein the welding mark and the reinforcing portion are arranged at positions side by side in the seat width direction.

7. The vehicle seat according to claim 6, wherein the welding mark is provided at a portion where the closed cross-sectional structure and the seat support frame face each other.

8. The seat support frame is a lower rail of a rail device that supports the seat body so as to be movable in the seat front-rear direction, the closed cross-sectional structure and a part of the lower rail are arranged to face each other, the foot connecting member has a projecting portion that projects outward in the seat width direction from the foot member, The vehicle seat according to claim 1 or 3, characterized in that an outer peripheral portion of a portion where the side wall portion of the foot member and the projecting portion of the foot connecting member are in contact with each other in the vertical direction is welded.

9. The seat support frame is a lower rail of a rail device that supports the seat body so as to be movable in the seat front-rear direction, the closed cross-sectional structure and a part of the lower rail are arranged to face each other, The seat support has a front foot member and a rear foot member as the foot members that are attached to the vehicle body floor at intervals in the seat front-rear direction, the foot connecting member connects the left and right front foot members, Among the left and right rear foot members, a reinforcing foot member is attached to the rear foot member on the side where a belt anchor for locking a seat belt is arranged at a position facing the rear foot member in the vertical direction or the seat front-rear direction, The vehicle seat according to claim 1 or 2, characterized in that a closed cross-sectional structure is formed by the rear foot member and the reinforcing foot member.

10. The vehicle seat is the seat body having the seat cushion and the seat back, a reclining device that rotatably connects the seat back to the seat cushion, a height link device that connects the seat body to the vehicle body floor so as to be movable up and down, and is provided with the seat cushion has a cushion frame serving as a skeleton, a cushion pad, and a skin material that covers the cushion frame and the cushion pad, the seat back has a back frame serving as a skeleton, a cushion pad, and a skin material that covers the back frame and the cushion pad, and The vehicle seat according to claim 1 or 2, characterized in that a belt anchor for locking a seat belt is provided at a position outside the seat cushion in the seat width direction.

Images