JP2021146954A - Vehicle seat - Google Patents

Abstract

To disperse a load applied from a striker to an upper rail in a vehicle seat.SOLUTION: A vehicle seat 1 includes: a rail device 3 which has a lower rail 11 and an upper rail 12; a base bracket 50 which is provided in an upper part of the upper rail and extends forward and backward; a seat body 8 which includes a seat cushion 6; a rotation member 60 which is rotatably supported around a support shaft 53 which is provided in a front part of the base bracket and extends to right and left sides and is connected to a front part of the seat cushion; a striker 54 which is provided in a rear part of the base bracket; a coupling device 5 which is provided in a rear part of the seat cushion and is detachably coupled with the striker. The base bracket has a bottom wall 51 and right and left side walls 52 and is formed into a groove shape opened upward. The support shaft and the striker are laid over the right and left side walls.SELECTED DRAWING: Figure 5

Description

The present invention relates to a vehicle seat.

Patent Document 1 discloses a vehicle seat having a slide rail and a seat cushion coupled to the upper rail of the slide rail via a hinge device. The hinge device rotatably connects the front end of the upper rail and the front end of the seat cushion. With this configuration, the vehicle seat can be tilted forward. The rear end of the seat is provided with a hook that connects to the striker provided at the rear end of the upper rail.

Japanese Unexamined Patent Publication No. 10-147165

The load generated on the occupant and the seat body at the time of a vehicle collision may be locally applied to the upper rail via the striker. Therefore, it is desirable to disperse the load applied from the striker to the upper rail.

In view of the above background, it is an object of the present invention to disperse the load applied from the striker to the upper rail in the vehicle seat.

In order to solve the above problems, one aspect of the present invention is a vehicle seat (1), which is a lower rail (11) provided on the floor (2) and extending in the front-rear direction, and an upper rail supported by the lower rail (1). A rail device (3) having 12), a seat body (8) including a base bracket (50) provided on the upper part of the upper rail and extending back and forth, and a seat cushion (6) for supporting the buttocks of an occupant, and the above. A rotating member (60) that is rotatably supported around a support shaft (53) that extends to the left and right provided at the front portion of the base bracket and is coupled to the front portion of the seat cushion, and the base bracket. It has a striker (54) provided at the rear portion and a coupling device (5) provided at the rear portion of the seat cushion and detachably coupled to the striker, and the base bracket has a bottom wall (51). It has left and right side walls (52) and is formed in a groove shape that opens upward, and the support shaft and the striker are hung on the left and right side walls.

According to this configuration, the striker is provided on the base bracket extending back and forth, and is provided on the upper rail via the base bracket. Therefore, the load applied to the striker is distributed to each part of the upper rail via the base bracket, and the load applied locally to the upper rail is suppressed. As a result, in the vehicle seat, the load applied from the striker to the upper rail can be dispersed.

In the above embodiment, the base bracket may have at least one spacer (56, 57) extending to the left and right and coupled to each of the left and right side walls.

According to this aspect, the left and right side walls are reinforced by spacers.

In the above embodiment, the rail device has a slide lock device (16) displaceably supported by the upper rail and selectively engageable with the lower rail, and the bottom wall of the base bracket is in the longitudinal direction. A recess (51A) recessed upward in the middle portion, a front coupling portion (51B) arranged on the front side of the recess and coupled to the upper rail, and a front coupling portion (51B) arranged on the rear side of the recess and coupled to the upper rail. It is preferable that the slide lock device is arranged at a position corresponding to the recess in the upper rail having the rear coupling portion (51B).

According to this aspect, the base bracket can be arranged on the upper rail while avoiding interference between the base bracket and the slide lock device.

In the above aspect, the recess may extend to the left and right and open to the left and right side walls.

According to this aspect, the slide lock device can be exposed to the side of the base bracket.

In the above aspect, the slide lock device is rotatably supported by the upper rail between a release position and a lock position, and a lock claw (a lock claw) that engages with an engaging portion formed on the lower rail at the lock position. 16A) and an operating lever (16B) that presses the base end of the lock claw and rotates the lock claw to the release position, and the base end of the lock claw passes through the recess. It is preferable that it protrudes to the side of the side wall.

According to this aspect, the lock claw can be operated by the operation lever.

In the above aspect, it is preferable that the operating lever for driving the slide lock device is rotatably supported by one of the side walls.

According to this aspect, the base bracket can also serve as a support structure for the operating lever.

In the above embodiment, the floor or the lower rail is provided with a first locking member (13) having a first locking portion (13C), and the side wall of the base bracket has the first locking portion. It is preferable that a second locking member (70) having a second locking portion (70A) arranged so as to face each other vertically via a gap is provided below the.

According to this aspect, when the base bracket and the upper rail move upward with respect to the lower rail and the floor due to an inertial force caused by a collision or the like, the first locking portion and the second locking portion engage with each other to load. Can resist. As a result, it becomes difficult for a load to be applied to the rail device, and deformation of the rail device can be suppressed. Normally, the first locking portion and the second locking portion face each other with a gap, so that when the rail device slides, the first locking portion and the second locking portion are caused by friction. It does not create resistance.

In the above aspect, the first locking portion and the second locking portion may extend back and forth.

According to this aspect, even if the upper rail slides back and forth with respect to the lower rail, the first locking portion and the second locking portion can face each other in the vertical direction.

In the above aspect, the second locking member is formed of a sheet metal member, and the second locking member has an upper plate portion (70B) fastened to the outer surface of the side wall and a lower edge of the upper plate portion. It has a lower plate portion (70C) extending downward from and away from the side wall, the second locking portion is provided on the lower edge of the lower plate portion, and the second locking member is on the side wall. It is preferable that the recess is provided behind the recess.

According to this aspect, the base bracket can be reinforced by the second locking member. Further, the portion of the base bracket provided with the striker 54 can be reinforced by the second locking member.

In the above aspect, it is preferable that the first locking portion and the second locking portion are provided in pairs on the left and right.

According to this aspect, the first locking member and the second locking member can be engaged at two places on the left side and the right side of the rail device, and the rail device can be reliably protected.

In the above aspect, the second locking member is provided in pairs on the left and right, and the left and right second locking members, the left and right side walls, and the spacer are attached to a bolt (72) penetrating them and the bolt. It is preferable that the nuts (73) to be screwed together are fastened together.

According to this aspect, the base bracket can be reinforced by bolts that fasten the left and right second locking members.

In the above aspect, the spacer may have a front spacer (56) provided in front of the striker and a rear spacer (57) provided behind the striker.

According to this aspect, the left and right second locking members can reinforce the base bracket with bolts that straddle the striker and fasten the left and right second locking members back and forth.

One aspect of the present invention is a vehicle seat (1), which is a rail device (3) provided on the floor (2) and having a lower rail (11) extending in the front-rear direction and an upper rail (12) supported by the lower rail. ), A base bracket (50) provided on the upper part of the upper rail and extending forward and backward, a seat cushion (6) for supporting the buttocks of the occupant, and a seat back (7) extending upward from the rear part of the seat cushion. A rotating member that is rotatably supported around the seat body (8) and a support shaft (53) that extends to the left and right provided at the front portion of the base bracket and is coupled to the front portion of the seat cushion. The base bracket has (60), a striker (54) provided at the rear portion of the base bracket, and a coupling device (5) provided at the rear portion of the seat cushion and detachably coupled to the striker. Has a bottom wall (51) and left and right side walls (52), is formed in a groove shape that opens upward, and the support shaft and the striker are hung on the left and right side walls. According to this configuration, the striker is provided on the base bracket extending back and forth, and is provided on the upper rail via the base bracket. Therefore, the load applied to the striker is distributed to each part of the upper rail via the base bracket, and the load applied locally to the upper rail is suppressed. As a result, in the vehicle seat, the load applied from the striker to the upper rail can be dispersed.

In the above embodiment, the base bracket may have at least one spacer (56, 57) extending to the left and right and coupled to each of the left and right side walls. According to this aspect, the left and right side walls are reinforced by spacers.

In the above embodiment, the rail device has a slide lock device (16) displaceably supported by the upper rail and selectively engageable with the lower rail, and the bottom wall of the base bracket is in the longitudinal direction. A recess (51A) recessed upward in the middle portion, a front coupling portion (51B) arranged on the front side of the recess and coupled to the upper rail, and a front coupling portion (51B) arranged on the rear side of the recess and coupled to the upper rail. It is preferable that the slide lock device is arranged at a position corresponding to the recess in the upper rail having the rear coupling portion (51B). According to this aspect, the base bracket can be arranged on the upper rail while avoiding interference between the base bracket and the slide lock device.

In the above aspect, the recess may extend to the left and right and open to the left and right side walls. According to this aspect, the slide lock device can be exposed to the side of the base bracket.

In the above aspect, the slide lock device is rotatably supported by the upper rail between a release position and a lock position, and a lock claw (a lock claw) that engages with an engaging portion formed on the lower rail at the lock position. 16A) and an operating lever (16B) that presses the base end of the lock claw and rotates the lock claw to the release position, and the base end of the lock claw passes through the recess. It is preferable that it protrudes to the side of the side wall. According to this aspect, the lock claw can be operated by the operation lever.

In the above aspect, it is preferable that the operating lever for driving the slide lock device is rotatably supported by one of the side walls. According to this aspect, the base bracket can also serve as a support structure for the operating lever.

In the above embodiment, the floor or the lower rail is provided with a first locking member (13) having a first locking portion (13C), and the side wall of the base bracket has the first locking portion. It is preferable that a second locking member (70) having a second locking portion (70A) arranged so as to face each other vertically via a gap is provided below the. According to this aspect, when the base bracket and the upper rail move upward with respect to the lower rail and the floor due to an inertial force caused by a collision or the like, the first locking member and the second locking member engage with each other to load. Can resist. As a result, it becomes difficult for a load to be applied to the rail device, and deformation of the rail device can be suppressed. Normally, the first locking member and the second locking member face each other with a gap, so that when the rail device slides, the first locking member and the second locking member are caused by friction. It does not create resistance.

In the above aspect, the first locking portion and the second locking portion may extend back and forth. According to this aspect, even if the upper rail slides back and forth with respect to the lower rail, the first locking member and the second locking member can face each other in the vertical direction.

In the above aspect, the second locking member is formed of a sheet metal member, and the second locking member has an upper plate portion (70B) fastened to the outer surface of the side wall and a lower edge of the upper plate portion. It has a lower plate portion (70C) extending downward from and away from the side wall, the second locking portion is provided on the lower edge of the lower plate portion, and the second locking member is on the side wall. It is preferable that the recess is provided behind the recess. According to this aspect, the base bracket can be reinforced by the second locking member. Further, the portion of the base bracket provided with the striker 54 can be reinforced by the second locking member.

In the above aspect, it is preferable that the first locking portion and the second locking portion are provided in pairs on the left and right. According to this aspect, the first locking member and the second locking member can be engaged at two places on the left side and the right side of the rail device, and the rail device can be reliably protected.

In the above aspect, the second locking member is provided in pairs on the left and right, and the left and right second locking members, the left and right side walls, and the spacer are attached to a bolt (72) penetrating them and the bolt. It is preferable that the nuts (73) to be screwed together are fastened together. According to this aspect, the base bracket can be reinforced by bolts that fasten the left and right second locking members.

In the above aspect, the spacer may have a front spacer (56) provided in front of the striker and a rear spacer (57) provided behind the striker. According to this aspect, the left and right second locking members can reinforce the base bracket with bolts that straddle the striker and fasten the left and right second locking members back and forth.

A perspective view of the frame of the vehicle seat according to the embodiment as viewed from the front left. Front view of vehicle seat frame Section III-III cross-sectional view of FIG. Right side view of the frame of the vehicle seat Perspective view of the structure of the lower part of the vehicle seat Front view of the lower structure of the vehicle seat Top view of the lower structure of the vehicle seat Right side view of the lower structure of the vehicle seat

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The vehicle seats constitute the right and center seats of the rear seats in the second or third row of the vehicle.

As shown in FIGS. 1 to 4, the seat 1 includes a rail device 3 provided on the floor 2, a seat cushion 6 supported by the rail device 3 via a hinge device 4 and a coupling device 5, and a seat cushion 6. It has a seat back 7 extending upward from the rear. The seat cushion 6 and the seat back 7 are referred to as a seat body 8. The seat cushion 6 supports the buttocks of the occupant, and the seat back 7 supports the back of the occupant.

The rail device 3 is provided on the floor 2 and has a lower rail 11 extending in the front-rear direction and an upper rail 12 supported by the lower rail 11. The lower rail 11 is formed in a groove shape that opens upward. The upper rail 12 has a lower portion arranged inside the lower rail 11 and an upper portion protruding upward from the lower rail 11. The upper end of the upper part of the upper rail 12 is formed in a plane facing upward. The upper rail 12 moves back and forth within a predetermined range with respect to the lower rail 11. In the present embodiment, the rail device 3 has a pair of lower rails 11 and upper rails 12 at left and right intervals. The lower rail 11 on the left side is connected to the floor 2 via the first locking member 13.

The first locking member 13 has a lower plate portion 13A extending back and forth along the upper surface of the floor 2 and left and right vertical plate portions 13B extending upward from the left and right side edges of the lower plate portion 13A, and has a groove shape. Is formed in. A first locking portion 13C is provided on the upper edge of each vertical plate portion 13B. The left and right first locking portions 13C are semi-circular hooks that are convex upward. The left and right first locking portions 13C extend in a direction away from the upper edge of the vertical plate portion 13B.

The lower rail 11 on the left side is arranged on the upper surface of the lower plate portion 13A. The lower rail 11 on the left side, the lower plate portion 13A of the first locking member 13, and the floor 2 are jointly tightened by bolts.

The lower rail 11 on the right side may be fastened directly to the floor 2 or may be fastened to the floor 2 via a mounting member called a foot.

As shown in FIG. 3, each rail device 3 has a slide lock device 16 displaceably supported by each upper rail 12 and selectively engageable with the corresponding lower rail 11. Each slide lock device 16 is rotatably supported by the upper rail 12 between the release position and the lock position, and engages with the engaging portion formed on the lower rail 11 at the lock position, and the lock claw 16A and the lock claw 16A. It has an urging member (not shown) for urging the lock claw 16A and an operation lever 16B for pressing the base end of the lock claw 16A to rotate the lock claw 16A to the release position.

The lock claw 16A is supported by an intermediate portion of the upper rail 12 in the front-rear direction. As shown in FIG. 6, the tip of the lock claw 16A is arranged inside the lower rail 11, and the base end of the lock claw 16A is arranged outside the lower rail 11. At the locked position, the lock claw 16A has its tip engaged with an engaging portion formed inside the lower rail 11. As a result, the movement of the upper rail 12 is restricted with respect to the lower rail 11. The tip of the lock claw 16A disengages from the engaging portion at the release position. As a result, the upper rail 12 can be moved with respect to the lower rail 11. The lock claw 16A rotates about a rotation axis extending in the front-rear direction, and its base end portion moves downward from the lock position toward the release position.

As shown in FIG. 1, the seat cushion 6 has a seat cushion frame 20 forming a skeleton, a pad supported by the seat cushion frame 20, and a skin material covering the pads. The seat cushion frame 20 is formed by combining front and rear members extending in the front-rear direction and lateral members extending in the left-right direction. Specifically, the seat cushion frame 20 has left and right cushion side members 23 extending in the front-rear direction, front members 24 extending left and right and connected to the front ends of both cushion side members 23 at both ends, and both left and right extending and both ends. It has a rear member 25 connected to the rear end of the cushion side member 23, and is formed in a quadrangular frame shape. Further, the seat cushion frame 20 extends to the left and right to form a first intermediate cross member 26 which is connected to intermediate portions in the front and rear of both cushion side members 23 at both ends, and a first intermediate cross member 26 which extends to the front and rear and extends in the front and rear directions of the first intermediate cross member 26. At the rear end, the middle front / rear member 27 connected to the middle part in the left-right direction of the rear member 25, and at the right end, the middle part of the middle front / rear member 27 in the front-rear direction and the left cushion at the left end. It has a second intermediate cross member 28 coupled to an intermediate portion of the side member 23 in the front-rear direction. Further, the seat cushion frame 20 extends back and forth, is connected to a portion between the cushion side member 23 on the right side of the first intermediate cross member 26 and the intermediate front and rear members 27 at the front end, and is connected to a portion on the right side of the rear member 25 at the rear end. It has a pan frame 29 connected to a portion between the cushion side member 23 and the intermediate front and rear members 27.

The front portion of the front member 24, the first intermediate cross member 26, the second intermediate cross member 28, the rear member 25, and the left cushion side member 23 is formed of a metal pipe. The front member 24, the front portion of the left cushion side member 23, and the second intermediate cross member 28 are formed by one bent pipe. The right cushion side member 23, the middle front and rear members 27, and the rear portion of the left cushion side member 23 are formed of sheet metal members. The members constituting the seat cushion frame 20 are joined to each other by welding.

The first intermediate cross member 26 functions as a so-called submarine prevention member. It prevents the submarine phenomenon in which the torso of the seated person seated on the seat 1 slides forward and downward on the surface of the seat 1 while being restrained by the seat belt 82 when the running vehicle collides forward. The first intermediate cross member 26 is arranged in front of the hip point of the seated person. The first intermediate cross member 26 regulates the movement of the seated person's waist forward by abutting the seated person's thigh from the front via the pad.

A seat back support portion 30 projecting upward is provided at each of the rear end portions of the left and right cushion side members 23 and the rear end portions of the intermediate front and rear members 27.

The seat back 7 has a seat back frame 32 forming a skeleton, a pad supported by the seat back frame 32, and a skin material covering the pads.

The seat back frame 32 extends between a pair of left and right backside members 33 extending vertically, an upper member 34 extending left and right and connected to the upper ends of both backside members 33 at both ends, and a pair of left and right backside members 33. A back intermediate member 35 that extends vertically and is connected to the middle part of the upper member 34 in the left-right direction at the upper end, and a back intermediate member 35 that extends left and right and is connected to the lower part of the right backside member 33 at the right end and the lower part of the back intermediate member 35 at the left end. It has a lower member 36 coupled to. A plate-shaped back pan frame 37 is provided behind the left and right back side members 33, the back intermediate member 35, the upper member 34, and the lower member 36.

Each of the left and right back side members 33 and the lower end portions of the back intermediate member 35 is rotatably supported by the corresponding seat back support portions 30 with a common axis extending to the left and right as the center of rotation. A reclining mechanism 38 for fixing the position of the seat back 7 with respect to the seat back support portion 30 is provided between the left and right back side members 33 and the back intermediate member 35 and each corresponding seat back support portion 30. There is.

As shown in FIGS. 3, 5 and 6, a base bracket 50 extending in the front-rear direction is provided on the upper portion of the upper rail 12. The base bracket 50 has a bottom wall 51 and left and right side walls 52, and is formed in a groove shape that opens upward. A support shaft 53 extending to the left and right is provided on the front portion of the base bracket 50. The left end of the support shaft 53 penetrates the left side wall 52, and the right end of the support shaft 53 penetrates the right side wall 52. The support shaft 53 is formed of bolts and nuts. A striker 54 is provided at the rear of the base bracket 50. The striker 54 is a shaft-shaped member extending to the left and right. The left end of the striker 54 is coupled to the left side wall 52 and the right end of the striker 54 is connected to the right side wall 52. The support shaft 53 and the striker 54 are hung on the left and right side walls 52.

The bottom wall 51 of the base bracket 50 has a recess 51A recessed upward in the middle portion in the longitudinal direction, a front coupling portion 51B arranged on the front side of the recess 51A, and a rear coupling portion arranged on the rear side of the recess 51A. It has a part 51C and a part 51C. The support shaft 53 is arranged above the front coupling portion 51B, and the striker 54 is disposed above the rear coupling portion 51C. The recess 51A extends to the left and right and opens to the left and right side walls 52.

The front coupling portion 51B is coupled to the front portion of the upper end of the upper rail 12. The rear coupling portion 51C is coupled to the rear portion of the upper end of the upper rail 12. Each of the front coupling portion 51B and the rear coupling portion 51C may be fastened to the upper rail 12 at a plurality of places by fastening members such as bolts and rivets. The recess 51A corresponds to an intermediate portion of the upper rail 12 in the front-rear direction. The recess 51A is arranged at a position corresponding to the lock claw 16A of the slide lock device 16. In other words, the slide lock device 16 is arranged at a position corresponding to the recess 51A in the upper rail 12. By arranging the lock claw 16A of the slide lock device 16 in the recess 51A, interference between the lock claw 16A and the base bracket 50 can be avoided. The base end of the lock claw 16A passes through the recess 51A and projects laterally to the side wall 52.

The operating lever 16B is rotatably supported by one of the two side walls 52. In this embodiment, the operating lever 16B is rotatably supported by the side wall 52 on the right side. The operating lever 16B extends back and forth, is rotatably supported by the side wall 52 at the intermediate portion, and its rear end is in contact with the upper surface of the base end of the lock claw 16A. As a result, when the front end of the operating lever 16B moves upward, the rear end of the operating lever 16B pushes the base end of the lock claw 16A downward. As a result, the lock claw 16A moves from the lock position to the release position.

The base bracket 50 has at least one spacers 56, 57 extending to the left and right and coupled to the left and right side walls 52, respectively. The front spacer 56 is arranged above the rear coupling portion 51C and in front of the striker 54. The rear spacer 57 is arranged above the rear coupling portion 51C and behind the striker 54. It is preferable that the front spacer 56 and the rear spacer 57 are formed in a cylindrical shape with both ends open, and are welded to the corresponding side walls 52 at the left and right ends.

A rotating member 60 is rotatably supported on the support shaft 53 about the support shaft 53. The rotating member 60 has an upper wall portion 60A and left and right vertical wall portions 60B extending downward from both left and right ends of the upper wall portion 60A. Left and right side walls 52 are arranged between the left and right vertical wall portions 60B, and the left and right vertical wall portions 60B are rotatably supported by the left and right end portions of the support shaft 53. The front portion of the base bracket 50, the support shaft 53, and the rotating member 60 constitute the hinge device 4 on the left side.

The upper wall portion 60A of the rotating member 60 is coupled to the lower surface of the front end of the intermediate front and rear members 27. A torsion coil spring 62 for urging the rear portion of the rotating member 60 upward is provided between the upper wall portion 60A of the rotating member 60 and the front coupling portion 51B of the base bracket 50. The coil portion of the torsion coil spring 62 is supported on the outer periphery of the support shaft 53.

A stopper (not shown) that regulates the rotation range of the rotating member 60 with respect to the base bracket 50 is provided between the rotating member 60 and the base bracket 50. The rotation in which the rotating member 60 rotates upward and forward with respect to the base bracket 50 about the support shaft 53 is defined as forward rotation, and the rotation in the opposite direction is defined as backward rotation. The rotating member 60 can rotate between the initial position and the rotating position rotated forward with respect to the initial position. When the rotating member 60 is in the initial position, the seat cushion 6 extends substantially horizontally and is arranged in a position where a person can sit. When the rotating member 60 is in the rotating position, the seat cushion 6 is in a forward tilted state in which the rear end is arranged upward with respect to the front end. The angle of the seat cushion 6 may change, for example, by 10 ° or more and 45 ° or less by changing the rotating member 60 from the initial position to the rotating position.

The front end of the upper end of the upper rail 12 on the right side is connected to the front portion of the cushion side member 23 on the right side via the hinge device 4 on the right side. The hinge device 4 has a lower member 64A coupled to the front end of the upper end of the upper rail 12, and an upper member 64B rotatably supported by the lower member 64A and coupled to the front portion of the seat cushion side member. The rotation shaft of the hinge device 4 on the right side is arranged coaxially with the support shaft 53. The hinge device 4 on the right side has a stopper (not shown) and has the same rotation range as the rotating member 60.

The coupling device 5 is provided at the rear portion of the seat cushion 6 and is detachably coupled to the striker 54. As shown in FIGS. 3, 5 and 7, the left coupling device 5 is coupled to the lower surface of the rear end of the intermediate front-rear member 27 and is arranged below the intermediate front-rear member 27. The coupling device 5 has a casing 5A forming an outer shell and a hook 5B rotatably supported by the casing 5A. The upper end of the casing 5A is coupled to the lower surface of the intermediate front and rear members 27. A bottomed slot 5C recessed upward is formed in the lower part of the casing 5A. The slot 5C penetrates the casing 5A in the left-right direction and opens downward. Slot 5C is formed to accept the striker 54.

The hook 5B is arranged in the casing 5A and is rotatable between a lock position that crosses the slot 5C back and forth and a release position that is retracted from the slot 5C. The hook 5B is urged toward the lock position by a spring. When the hook 5B is in the locked position, the striker 54 in the slot 5C cannot leave the slot 5C. By moving the hook 5B from the locked position to the released position, the striker 54 in the slot 5C can be released from the slot 5C. A cam surface is formed on the upper edge of the portion of the hook 5B protruding into the slot 5C. When the striker 54 pushes the cam surface downward from above, the hook 5B moves from the locked position to the released position. As a result, even when the hook 5B is in the locked position, the striker 54 can push the hook 5B away and enter the slot 5C.

As shown in FIG. 1, the hook 5B is connected to an operation unit (not shown) via a control cable (not shown). The user can change the coupling device 5 from the locked state to the released state by operating the operation unit. The operation unit may be provided at the rear end of the seat cushion 6 or the back surface of the seat back 7.

The coupling device 5 on the right side has the same configuration as the coupling device 5 on the left side. The coupling device 5 on the right side is detachably coupled to the striker 66 provided at the rear end of the upper surface of the upper rail 12 on the right side.

Each of the left and right side walls 52 of the base bracket 50 has a second locking member 70 having a second locking portion 70A arranged below the first locking portion 13C so as to face each other vertically with a gap. It is provided. The second locking member 70 is formed of a sheet metal member. Each second locking member 70 has an upper plate portion 70B fastened to the outer surface of the corresponding side wall 52, and a lower plate portion 70C extending downward from the lower edge of the upper plate portion 70B and in a direction away from the side wall 52. The second locking portion 70A is provided on the lower edge of the lower plate portion 70C. The second locking portion 70A is a semi-circular hook that is convex downward. The second locking member 70 extends back and forth, and the second locking portion 70A extends back and forth. The second locking member 70 is provided on the side wall 52 behind the recess 51A.

The left and right second locking members 70, the left and right side walls 52, and the front spacer 56 are jointly tightened by a bolt 72 penetrating them and a nut 73 screwed into the bolt 72. Further, the left and right second locking members 70, the left and right side walls 52, and the rear spacer 57 are jointly tightened by a bolt 72 penetrating them and a nut 73 screwed into the bolt 72.

The front member 24 is provided with a retractor bracket 80 projecting downward. A seatbelt retractor 81 is attached to the retractor bracket 80. The seatbelt 82 is retractably housed in the seatbelt retractor 81. The seatbelt 82 passes below the first intermediate cross member 26 from the seatbelt retractor 81, extends rearward, and bends upward along the lower and rear surfaces of the rear member 25. After that, the seat belt 82 extends upward along the front surface of the back pan frame 37, and then passes behind the upper member 34. The seatbelt 82 then passes in front of the upper member 34 and extends downward, with its ends coupled to the rear member 25. A tongue 83 is movably supported on the seat belt 82 in the longitudinal direction of the seat belt 82. The cushion side member 23 on the left side is provided with a buckle 84 that is detachably connected to the tongue 83. By connecting the tongue 83 to the buckle 84, the seat belt 82 can restrain the occupant seated in the central seat.

In the seat 1 described above, the striker 54 is provided on the base bracket 50 extending in the front-rear direction, and is provided on the upper rail 12 via the base bracket 50. Therefore, the load applied to the striker 54 is distributed to each part of the upper rail 12 via the base bracket 50, and the load applied locally to the upper rail 12 is suppressed. As a result, in the seat 1, the load applied from the striker 54 to the upper rail 12 can be dispersed. In the present embodiment, since the seat belt retractor 81 and the end portions of the seat belt 82 are provided on the seat 1, the inertial force applied to the occupant at the time of a vehicle collision is applied to the seat 1 via the seat belt 82. Even in such a case, since the striker 54 is provided on the upper rail 12 via the base bracket 50, the deformation of the upper rail 12 can be suppressed.

When the base bracket 50 and the upper rail 12 move upward with respect to the lower rail 11 and the floor 2 due to an inertial force caused by a collision or the like, the first locking portion 13C and the second locking portion 70A engage with each other to load. Can resist. As a result, it becomes difficult for a load to be applied to the rail device 3, and deformation of the rail device 3 can be suppressed. Normally, the first locking portion 13C and the second locking portion 70A face each other with a gap, so that when the rail device 3 slides, the first locking portion 13C and the second locking portion 13C and the second locking portion are locked. The portion 70A does not generate a resistance force due to friction.

Since the first locking portion 13C and the second locking portion 70A extend back and forth, even if the upper rail 12 slides back and forth with respect to the lower rail 11, the first locking portion 13C and the second locking portion 13C and the second locking portion are locked. The parts 70A can face each other in the vertical direction.

The upper plate portion 70B of the second locking member 70 is provided along the outer surface of the side wall 52 of the base bracket 50. Therefore, the base bracket 50 is reinforced by the second locking member 70. The left and right second locking members 70, the left and right side walls 52, and the front spacer 56 are jointly tightened by bolts 72 and nuts 73. Further, the left and right second locking members 70, the left and right side walls 52, and the rear spacer 57 are jointly tightened by bolts 72 and nuts 73. The front spacer 56 is located in front of the striker 54 and the rear spacer 57 is located behind the striker 54. As a result, the rigidity of the portion of the base bracket 50 where the striker 54 is provided is improved.

The base bracket 50 has a recess 51A, and the lock claw 16A of the slide lock device 16 is arranged in the recess 51A. As a result, the base bracket 50 can be arranged on the upper rail 12 while avoiding interference between the base bracket 50 and the slide lock device 16.

Although the description of the specific embodiment is completed above, the present invention can be widely modified without being limited to the above embodiment. For example, the upper rail 12 on the right side may be provided with the same base bracket 50 as the upper rail 12 on the left side.

1: Seat 2: Floor 3: Rail device 4: Hinge device 5: Coupling device 6: Seat cushion 7: Seat back 8: Seat body 11: Lower rail 12: Upper rail 13: First locking member 13C: First locking portion 16: Slide lock device 16A: Lock claw 16B: Operation lever 50: Base bracket 51: Bottom wall 51A: Recess 51B: Front coupling portion 51C: Rear coupling portion 52: Side wall 53: Support shaft 54: Striker 56: Front spacer 57: Rear spacer 60: Rotating member 62: Torsion coil spring 70: Second locking member 70A: Second locking portion 70B: Upper plate portion 70C: Lower plate portion 72: Bolt 73: Nut

Claims (12)

It ’s a vehicle seat,
A rail device provided on the floor and having a lower rail extending in the front-rear direction and an upper rail supported by the lower rail,
A base bracket provided on the upper part of the upper rail and extending back and forth,
The seat body, including the seat cushion that supports the occupant's buttocks,
A rotating member that is rotatably supported around a support shaft that extends to the left and right provided at the front portion of the base bracket and is coupled to the front portion of the seat cushion.
With the striker provided at the rear of the base bracket,
It has a coupling device provided at the rear of the seat cushion and detachably coupled to the striker.
The base bracket has a bottom wall and left and right side walls, and is formed in a groove shape that opens upward.
The support shaft and the striker are vehicle seats that are hung on the left and right side walls. The vehicle seat according to claim 1, wherein the base bracket extends to the left and right and has at least one spacer connected to each of the left and right side walls. The rail device has a slide lock device that is displaceably supported by the upper rail and selectively engages with the lower rail.
The bottom wall of the base bracket is arranged in a recess that is recessed upward in the middle portion in the longitudinal direction, a front coupling portion that is arranged in front of the recess, and is coupled to the upper rail, and is arranged in the rear side of the recess. , With a rear coupling portion coupled to the upper rail
The vehicle seat according to claim 2, wherein the slide lock device is arranged at a position corresponding to the recess in the upper rail. The vehicle seat according to claim 3, wherein the recess extends to the left and right and opens to the left and right side walls. The slide lock device is rotatably supported by the upper rail between the release position and the lock position, and the lock claw that engages with the engaging portion formed on the lower rail at the lock position and the lock claw. It has an operating lever that presses the base end and rotates the lock claw to the release position.
The vehicle seat according to claim 4, wherein the base end of the lock claw passes through the recess and projects laterally to the side wall. The vehicle seat according to claim 5, wherein the operating lever for driving the slide lock device is rotatably supported on one of the side walls. The floor or the lower rail is provided with a first locking member having a first locking portion.
The side wall of the base bracket is provided with a second locking member having a second locking portion arranged below the first locking portion so as to face each other vertically with a gap. 3. The vehicle seat according to any one of claims 6. The vehicle seat according to claim 7, wherein the first locking portion and the second locking portion extend in the front-rear direction. The second locking member is formed of a sheet metal member and is formed of a sheet metal member.
The second locking member has an upper plate portion fastened to the outer surface of the side wall, and a lower plate portion extending downward from the lower edge of the upper plate portion and in a direction away from the side wall.
The second locking portion is provided on the lower edge of the lower plate portion.
The vehicle seat according to claim 7 or 8, wherein the second locking member is provided behind the recess on the side wall. The vehicle seat according to any one of claims 7 to 9, wherein the first locking portion and the second locking portion are provided in pairs on the left and right. A pair of left and right locking members are provided, and the second locking member is provided.
The vehicle seat according to claim 10, wherein the left and right second locking members, the left and right side walls, and the spacer are jointly fastened by a bolt penetrating them and a nut screwed into the bolt. The vehicle seat according to claim 11, wherein the spacer has a front spacer provided in front of the striker and a rear spacer provided in the rear of the striker.

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