JP7436818B2 - vehicle seat - Google Patents

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 an 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. A hook is provided at the rear end of the seat to connect to a striker provided at the rear end of the upper rail.

Japanese Patent Application Publication No. 10-147165

The load generated on the occupant and the seat body during 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, an object of the present invention is to disperse the load applied from the striker to the upper rail in a vehicle seat.

In order to solve the above problems, one aspect of the present invention is a vehicle seat (1), which includes a lower rail (11) provided on a floor (2) and extending back and forth, and an upper rail (11) supported by the lower rail. 12); a base bracket (50) provided on the upper part of the upper rail and extending longitudinally; and a seat body (8) including a seat cushion (6) that supports the buttocks of an occupant; A rotating member (60) rotatably supported around a support shaft (53) extending left and right provided at the front part of the base bracket and coupled to the front part of the seat cushion, and the base bracket a striker (54) provided at the rear of the seat cushion; and a coupling device (5) provided at the rear of the seat cushion and removably coupled to the striker, the base bracket being connected to a bottom wall (51). , left and right side walls (52), and is formed in a groove shape opening upward, and the support shaft and the striker are spanned over the left and right side walls.

According to this configuration, the striker is provided on the base bracket that extends 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. Thereby, in the vehicle seat, the load applied from the striker to the upper rail can be dispersed.

In the above aspect, the base bracket may include at least one spacer (56, 57) extending 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 the spacer.

In the above aspect, 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 a recessed part (51A) recessed upward in the middle part; a front joint part (51B) arranged on the front side of the recessed part and coupled to the upper rail; and a front coupling part (51B) arranged on the rear side of the recessed part and coupled to the upper rail. It is preferable that the slide lock device has a rear coupling portion (51B) formed in the upper rail, and the slide lock device is disposed at a position corresponding to the recess in the upper rail.

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

In the above aspect, it is preferable that the recess extends left and right and opens in the left and right side walls.

According to this aspect, the slide lock device can be exposed on 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 in the lock position, the slide lock device has a lock claw ( 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 laterally of the side wall.

According to this aspect, the lock pawl can be operated by the operating 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 aspect, 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 is provided with the first locking portion. It is preferable that a second locking member (70) having second locking portions (70A) arranged to face each other vertically with a gap therebetween is provided below.

According to this aspect, when the base bracket and the upper rail move upward relative to the lower rail and the floor due to inertia caused by a collision, etc., the first locking part and the second locking part engage with each other and the load is applied. can withstand. Thereby, it becomes difficult to apply a load to the rail device, and deformation of the rail device can be suppressed. Normally, the first locking part and the second locking part are opposed to each other with a gap between them, so when the rail device slides, the first locking part and the second locking part are caused by friction. It does not create any 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 vertically.

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

According to this aspect, the base bracket can be reinforced by the second locking member. Moreover, the portion of the base bracket where the striker 54 is provided 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 sides.

According to this aspect, the first locking member and the second locking member can be engaged with each other at two positions on the left and right sides of the rail device, and the rail device can be reliably protected.

In the above aspect, the second locking members are provided as a pair of left and right, and the left and right second locking members, the left and right side walls, and the spacer are connected to a bolt (72) passing through them, and It is preferable that they are fastened together with a threaded nut (73).

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

In the above aspect, the spacer preferably includes a front spacer (56) provided in front of the striker and a rear spacer (57) provided in the rear of the striker.

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

One aspect of the present invention is a vehicle seat (1), which is provided on a floor (2) and includes a lower rail (11) extending back and forth, and a rail device (3) having an upper rail (12) supported by the lower rail. ), a base bracket (50) provided at the top of the upper rail and extending back and forth, a seat cushion (6) that supports the buttocks of the occupant, and a seat back (7) that extends upward from the rear of the seat cushion. a rotation member that is rotatably supported around the seat body (8) and a support shaft (53) provided at the front portion of the base bracket and extending left and right, and coupled to the front portion of the seat cushion; (60), a striker (54) provided at the rear of the base bracket, and a coupling device (5) provided at the rear of the seat cushion and detachably coupled to the striker, the base bracket has a bottom wall (51) and left and right side walls (52), and is formed in the shape of a groove opening upward, and the support shaft and the striker are spanned over the left and right side walls. According to this configuration, the striker is provided on the base bracket that extends 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. Thereby, in the vehicle seat, the load applied from the striker to the upper rail can be dispersed.

In the above aspect, the base bracket may include at least one spacer (56, 57) extending 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 the spacers.

In the above aspect, 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 a recessed part (51A) recessed upward in the middle part; a front joint part (51B) arranged on the front side of the recessed part and coupled to the upper rail; and a front coupling part (51B) arranged on the rear side of the recessed part and coupled to the upper rail. It is preferable that the slide lock device has a rear coupling portion (51B) formed in the upper rail, and the slide lock device is disposed at a position corresponding to the recess in the upper rail. According to this aspect, the base bracket can be placed on the upper rail while avoiding interference between the base bracket and the slide lock device.

In the above aspect, it is preferable that the recess extends left and right and opens in the left and right side walls. According to this aspect, the slide lock device can be exposed on 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 in the lock position, the slide lock device has a lock claw ( 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 laterally of the side wall. According to this aspect, the lock pawl can be operated by the operating 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 aspect, 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 is provided with the first locking portion. It is preferable that a second locking member (70) having second locking portions (70A) arranged to face each other vertically with a gap therebetween is provided below. According to this aspect, when the base bracket and the upper rail move upward relative to the lower rail and the floor due to inertia caused by a collision or the like, the first locking member and the second locking member engage with each other and the load is applied. can withstand. Thereby, it becomes difficult to apply a load to the rail device, and deformation of the rail device can be suppressed. Normally, the first locking member and the second locking member are opposed to each other with a gap between them, so when the rail device slides, the first locking member and the second locking member are caused by friction. It does not create any 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 vertically.

In the above aspect, the second locking member is formed of a sheet metal member, and the second locking member includes an upper plate part (70B) fastened to the outer surface of the side wall, and a lower edge of the upper plate part. and a lower plate portion (70C) extending downward from and away from the side wall, the second locking portion being provided at a lower edge of the lower plate portion, and the second locking member being located at the side wall. It is preferable that the recess is provided at a rear side of the recess. According to this aspect, the base bracket can be reinforced by the second locking member. Moreover, the portion of the base bracket where the striker 54 is provided 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 sides. According to this aspect, the first locking member and the second locking member can be engaged with each other at two positions on the left and right sides of the rail device, and the rail device can be reliably protected.

In the above aspect, the second locking members are provided as a pair of left and right, and the left and right second locking members, the left and right side walls, and the spacer are connected to a bolt (72) passing through them, and It is preferable that they are fastened together with a threaded nut (73). According to this aspect, the base bracket can be reinforced by the bolts that fasten the left and right second locking members.

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

A perspective view of the frame of the vehicle seat according to the embodiment, viewed from the front left. Front view of vehicle seat frame III-III sectional view in Figure 2 Right side view of vehicle seat frame Perspective view of the structure of the lower part of the vehicle seat Front view of the structure of the lower part of the vehicle seat Plan view of the structure of the lower part of the vehicle seat Right side view of the structure of the lower part of the vehicle seat

Embodiments of the present invention will be described below with reference to the drawings. The vehicle seats constitute the right and center seats of the second or third row rear seats of an automobile.

As shown in FIGS. 1 to 4, the seat 1 includes a rail device 3 provided on a 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. and a seat back 7 extending upward from the rear of the seat. The seat cushion 6 and the seat back 7 are referred to as a seat body 8. The seat cushion 6 supports the occupant's buttocks, and the seat back 7 supports the occupant's back.

The rail device 3 is provided on the floor 2 and includes a lower rail 11 extending back and forth, and an upper rail 12 supported by the lower rail 11. The lower rail 11 is formed into a groove shape that opens upward. The upper rail 12 has a lower portion disposed inside the lower rail 11 and an upper portion protruding upward from the lower rail 11. The upper end of the upper rail 12 is formed into a plane facing upward. The upper rail 12 moves back and forth within a predetermined range with respect to the lower rail 11. In this embodiment, the rail device 3 has a pair of lower rails 11 and upper rails 12 spaced apart from each other on the left and right. The left lower rail 11 is coupled to the floor 2 via a first locking member 13.

The first locking member 13 has a groove-shaped 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. is formed. 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 semicircular hooks that are convex upward. The left and right first locking portions 13C extend in directions away from each other from the upper edge of the vertical plate portion 13B.

The left lower rail 11 is arranged on the upper surface of the lower plate portion 13A. The left lower rail 11, the lower plate portion 13A of the first locking member 13, and the floor 2 are fastened together with 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 that is movably supported by each upper rail 12 and can be selectively engaged with the corresponding lower rail 11. As shown in FIG. Each slide lock device 16 is rotatably supported by the upper rail 12 between a release position and a lock position, and includes a lock claw 16A that engages with an engagement portion formed on the lower rail 11 in the lock position, and a lock claw 16A that engages with an engagement portion formed on the lower rail 11 in the lock position. It has a biasing member (not shown) that biases the locking claw 16A to the lock position, and an operating lever 16B that presses the base end of the locking claw 16A to rotate the locking claw 16A to the release position.

The lock pawl 16A is supported at 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. In the lock position, the lock claw 16A has its tip engaged with an engagement portion formed inside the lower rail 11. Thereby, movement of the upper rail 12 with respect to the lower rail 11 is restricted. In the release position, the tip of the lock claw 16A separates from the engagement portion. This allows the upper rail 12 to move relative 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 to the release position.

As shown in FIG. 1, the seat cushion 6 includes a seat cushion frame 20 forming a skeleton, a pad supported by the seat cushion frame 20, and a skin material covering the pad. The seat cushion frame 20 is formed by combining front and rear members extending back and forth and lateral members extending left and right. Specifically, the seat cushion frame 20 includes left and right cushion side members 23 extending front and rear, a front member 24 extending left and right and coupled to the front ends of both cushion side members 23 at both ends, and a front member 24 extending left and right and coupled to the front ends of both cushion side members 23 at both ends. It has a rear member 25 coupled to the rear end of the cushion side member 23, and is formed into a rectangular frame shape. The seat cushion frame 20 also extends in the left and right directions, and includes a first intermediate cross member 26 that is coupled to the front and rear intermediate portions of both cushion side members 23 at both ends, and a first intermediate cross member 26 that extends in the left and right directions and is coupled to the front and rear intermediate portions of both cushion side members 23 at both ends. an intermediate front-rear member 27 connected to an intermediate part in the front-rear direction of the rear member 25 at the rear end thereof, and a left-hand cushion extending in the left and right directions, and an intermediate part in the front-rear direction of the intermediate front-rear member 27 at the right end and a 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 in the front and back, and is coupled at the front end to a portion between the right cushion side member 23 of the first intermediate cross member 26 and the intermediate front and rear member 27, and at the rear end to the right side of the rear member 25. 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 portions 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 are formed of metal pipes. The front member 24, the front part of the left cushion side member 23, and the second intermediate cross member 28 are formed by one bent pipe. The right side cushion side member 23, the intermediate front and rear members 27, and the rear part of the left side cushion side member 23 are formed of sheet metal members. Each member constituting the seat cushion frame 20 is coupled to each other by welding.

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

Seat back support portions 30 that protrude upward are provided at the rear end portions of the left and right cushion side members 23 and at the rear end portions of the intermediate front and rear members 27, respectively.

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

The seat back frame 32 includes a pair of left and right backside members 33 that extend vertically, an upper member 34 that extends left and right and is 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 coupled to an intermediate portion of the upper member 34 in the left-right direction at its upper end; and a lower member 36 coupled to. A plate-shaped back pan frame 37 is provided behind the left and right back side members 33, back intermediate member 35, upper member 34, and lower member 36.

The lower end portions of the left and right back side members 33 and the back intermediate member 35 are each supported by the corresponding seat back support portions 30 so as to be rotatable about a common axis extending left and right. A reclining mechanism 38 for fixing the position of the seat back 7 with respect to the seat back support section 30 is provided between the left and right back side members 33 and the back intermediate member 35 and each corresponding seat back support section 30. There is.

As shown in FIGS. 3, 5, and 6, a base bracket 50 is provided on the upper part of the upper rail 12 and extends back and forth. The base bracket 50 has a bottom wall 51 and left and right side walls 52, and is formed in the shape of a groove opening upward. A support shaft 53 extending left and right is provided at the front of the base bracket 50. The left end of the support shaft 53 passes through the left side wall 52, and the right end of the support shaft 53 passes through the right side wall 52. The support shaft 53 is formed by a bolt and a nut. A striker 54 is provided at the rear of the base bracket 50. The striker 54 is a shaft-shaped member extending 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 coupled to the right side wall 52. The support shaft 53 and the striker 54 are spanned between 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 part in the longitudinal direction, a front joint 51B arranged on the front side of the recess 51A, and a rear joint 51B arranged on the rear side of the recess 51A. 51C. The support shaft 53 is arranged above the front joint part 51B, and the striker 54 is arranged above the rear joint part 51C. The recess 51A extends left and right and is open 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 joint portion 51B and the rear joint portion 51C may be fastened to the upper rail 12 at a plurality of locations using fastening members such as bolts and rivets. The recessed portion 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 in the upper rail 12 at a position corresponding to the recess 51A. 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 protrudes to the side of 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 right side wall 52. The operating lever 16B extends back and forth, is rotatably supported by the side wall 52 at the middle portion, and has its rear end 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. Thereby, the lock claw 16A moves from the lock position to the release position.

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

A rotating member 60 is supported on the support shaft 53 so as to be rotatable 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. The 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 ends of the support shaft 53. The front part of the base bracket 50, the support shaft 53, and the rotating member 60 constitute the left hinge device 4.

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 member 27. A torsion coil spring 62 is provided between the upper wall portion 60A of the rotating member 60 and the front joint portion 51B of the base bracket 50 to bias the rear portion of the rotating member 60 upward. The coil portion of the torsion coil spring 62 is supported on the outer periphery of the support shaft 53.

A stopper (not shown) is provided between the rotating member 60 and the base bracket 50 to restrict the rotation range of the rotating member 60 with respect to the base bracket 50. The rotation in which the rotating member 60 rotates upward and forward relative to the base bracket 50 about the support shaft 53 is referred to as forward rotation, and the rotation in the opposite direction is referred to as backward rotation. The rotating member 60 can rotate between an initial position and a rotating position rotated forward relative to the initial position. When the rotating member 60 is in the initial position, the seat cushion 6 extends substantially horizontally and is placed in a use position where a person can sit. When the rotating member 60 is in the rotating position, the seat cushion 6 is in a forward-inclined state with the rear end located above the front end. As the rotating member 60 changes from the initial position to the rotating position, the angle of the seat cushion 6 may change, for example, by 10 degrees or more and 45 degrees or less.

The front end of the upper end of the right upper rail 12 is coupled to the front part of the right cushion side member 23 via the right hinge device 4. The hinge device 4 includes 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 axis of the right hinge device 4 is arranged coaxially with the support shaft 53. The right hinge device 4 has a stopper (not shown) and has the same rotation range as the rotation member 60.

The coupling device 5 is provided at the rear 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 and rear member 27, and is disposed below the intermediate front and rear member 27. As shown in FIGS. 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 member 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. The slot 5C is formed to be able to receive the striker 54.

The hook 5B is disposed within the casing 5A and is rotatable between a locked position where it traverses back and forth within the slot 5C and a released position where it is retracted from the slot 5C. The hook 5B is biased toward the lock position by a spring. When the hook 5B is in the locked position, the striker 54 in the slot 5C cannot be removed from the slot 5C. By moving the hook 5B from the lock position to the release position, the striker 54 located within the slot 5C can be removed from the slot 5C. A cam surface is formed on the upper edge of the portion of the hook 5B that protrudes into the slot 5C. When the striker 54 pushes the cam surface from above to below, the hook 5B moves from the lock position to the release position. Thereby, even when the hook 5B is in the locked position, the striker 54 can push away the hook 5B and enter the slot 5C.

As shown in FIG. 1, the hook 5B is connected to an operating section (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 operating section. The operating section is preferably 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 a similar configuration to the coupling device 5 on the left side. The right coupling device 5 is detachably coupled to a striker 66 provided at the rear end of the upper surface of the right upper rail 12.

A second locking member 70 is provided on each of the left and right side walls 52 of the base bracket 50, and has a second locking portion 70A disposed below the first locking portion 13C so as to be vertically opposed to each other with a gap therebetween. 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 at the lower edge of the lower plate portion 70C. The second locking portion 70A is a semicircular 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 in the side wall 52 at the rear of the recess 51A.

The left and right second locking members 70, the left and right side walls 52, and the front spacer 56 are fastened together by a bolt 72 that passes through them and a nut 73 that is screwed onto 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 that passes through them and a nut 73 that is screwed onto the bolt 72.

The front member 24 is provided with a retractor bracket 80 that projects downward. A seat belt retractor 81 is attached to the retractor bracket 80. A seat belt 82 is housed in the seat belt retractor 81 so as to be retractable. The seat belt 82 extends rearward from the seat belt retractor 81 passing below the first intermediate cross member 26 , and bends upward along the lower and rear surfaces of the rear member 25 . Thereafter, the seat belt 82 extends upward along the front surface of the back pan frame 37, and then passes behind the upper member 34. Thereafter, the seat belt 82 passes in front of the upper member 34 and extends downward, and its end portion is coupled to the rear member 25. A tongue 83 is supported on the seat belt 82 so as to be movable in the longitudinal direction of the seat belt 82. The left cushion side member 23 is provided with a buckle 84 that is detachably coupled to the tongue 83. By connecting the tongue 83 to the buckle 84, the seat belt 82 can restrain the occupant seated in the center seat.

In the seat 1 described above, the striker 54 is provided on a base bracket 50 that extends back and forth, 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. Thereby, in the seat 1, the load applied from the striker 54 to the upper rail 12 can be dispersed. In this embodiment, the end portions of the seatbelt retractor 81 and the seatbelt 82 are provided on the seat 1 , so that the inertia force applied to the occupant during a vehicle collision is applied to the seat 1 via the seatbelt 82 . Even in such a case, since the striker 54 is provided on the upper rail 12 via the base bracket 50, deformation of the upper rail 12 can be suppressed.

When the base bracket 50 and the upper rail 12 move upward relative to the lower rail 11 and the floor 2 due to inertia caused by a collision, the first locking portion 13C and the second locking portion 70A engage with each other to absorb the load. can withstand. Thereby, it becomes difficult to apply a load to the rail device 3, and deformation of the rail device 3 can be suppressed. Normally, the first locking part 13C and the second locking part 70A face each other with a gap between them, so when the rail device 3 slides, the first locking part 13C and the second locking part 70A The portion 70A does not generate any resistance 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 70A extend back and forth. The portions 70A can face each other vertically.

An 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 fastened together with 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 fastened together with bolts 72 and nuts 73. A front spacer 56 is arranged in front of the striker 54, and a rear spacer 57 is arranged behind the striker 54. These improve the rigidity of the portion of the base bracket 50 where the striker 54 is provided.

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. Thereby, the base bracket 50 can be placed 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 embodiments has been completed above, the present invention is not limited to the above-mentioned embodiments and can be widely modified and implemented. For example, the right upper rail 12 may also be provided with the same base bracket 50 as the left upper rail 12.

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 : Recessed part 51B : Front joint part 51C : Rear joint part 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 part 70B : Upper plate part 70C : Lower plate part 72 : Bolt 73 : Nut

Claims (11)

A vehicle seat,
a rail device provided on a floor and having a lower rail extending back and forth, 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;
a seat body including a seat cushion that supports the buttocks of an occupant;
a rotating member rotatably supported around a support shaft extending left and right provided at the front portion of the base bracket and coupled to the front portion of the seat cushion;
a striker provided at the rear of the base bracket;
a coupling device provided at the rear of the seat cushion and detachably coupled to the striker;
The base bracket has a bottom wall, left and right side walls, is formed in a groove shape opening upward, extends left and right, and has at least one spacer coupled to each of the left and right side walls,
The support shaft and the striker span the left and right side walls of the vehicle seat. The rail device includes a slide lock device that is displaceably supported by the upper rail and can be selectively engaged with the lower rail,
The bottom wall of the base bracket includes a recessed portion recessed upward in an intermediate portion in the longitudinal direction, a front joint portion disposed on the front side of the recessed portion and coupled to the upper rail, and a front coupling portion disposed on the rear side of the recessed portion. , a rear coupling portion coupled to the upper rail;
The vehicle seat according to claim 1 , wherein the slide lock device is arranged in a position corresponding to the recess in the upper rail. The vehicle seat according to claim 2 , wherein the recess extends left and right and opens in the left and right side walls. The slide lock device is rotatably supported by the upper rail between a release position and a lock position, and includes a lock pawl that engages with an engaging portion formed on the lower rail in the lock position, and a lock pawl that engages with an engaging portion formed on the lower rail in the lock position. an operating lever that presses the base end and rotates the lock claw to the release position,
4. The vehicle seat according to claim 3 , wherein the base end of the lock claw passes through the recess and projects laterally of the side wall. The vehicle seat according to claim 4, wherein the operating lever for driving the slide lock device is rotatably supported by one of the side walls. A first locking member having a first locking portion is provided on the floor or the lower rail,
The side wall of the base bracket is provided with a second locking member having a second locking portion disposed below the first locking portion so as to vertically face each other with a gap therebetween. The vehicle seat according to any one of claims 2 to 5. The vehicle seat according to claim 6, wherein the first locking portion and the second locking portion extend in the front and rear. The second locking member 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 part is provided at the lower edge of the lower plate part,
8. The vehicle seat according to claim 6 , wherein the second locking member is provided rearward of the recess in the side wall. The vehicle seat according to any one of claims 6 to 8 , wherein the first locking portion and the second locking portion are provided as a pair on the left and right. The second locking members are provided in a pair on the left and right,
10. The vehicle seat according to claim 9, wherein the left and right second locking members, the left and right side walls, and the spacer are fastened together by a bolt passing through them and a nut screwed into the bolt. The vehicle seat according to claim 10 , wherein the spacer includes a front spacer provided in front of the striker and a rear spacer provided in the rear of the striker.

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