JP2011011633A - Vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance peeling prevention strength of a seat body with respect to a rotating disk and a floor.SOLUTION: In a vehicle seat, the seat body 1 is horizontally rotatably connected onto the floor F through the rotating disk 10. The rotating disk 10 includes a stationary body 11 integrally connected to a support base 8 on the floor F; and a rotary body 12 relatively rotatably attached to the stationary body 11. In the seat body 1, a bottom surface part of a seat cushion 3 is integrally connected to an upper surface part of the rotary body 12. In the connection structure between the seat body 1 and the upper surface part of the rotary body 12, a collection of connection points (connection pins P1-P3) for integrally connecting the seat body 1 and the rotary body 12 is set at four locations. Within each of formation regions of virtual triangles TR1-TR4 formed by connecting these three connection points (the connection pins P1-P3), a reinforcement point (reinforcement pin R) is set where the seat body 1 (or the rotary body 12) and the support base 8 are connected to each other vertically integrally in a free state in the direction of rotation.

Description

  The present invention relates to a vehicle seat. More specifically, the present invention relates to a vehicle seat connected to a floor so that a seat body can be rotated outward or inward with respect to a vehicle traveling direction via a turntable.

  2. Description of the Related Art Conventionally, some vehicle seats are configured such that a seat body is connected to a floor via a turntable and can be horizontally rotated outward or inward with respect to the floor. Here, Patent Document 1 below discloses an embodiment in which the above-described seat body is connected to a floor via a turntable. In this disclosure, the rotating disk has a configuration in which a movable side member serving as a rotating body is connected to a fixed side member fixed to the floor. The seat body is integrally connected to the upper surface portion of the movable member.

JP 2005-1499 A

  However, in the prior art disclosed above, when the seat body receives an input of a large load in a direction in which the seat body is peeled off from the floor due to the occurrence of a vehicle collision or the like, the seat body rotates outward or inward. If it becomes, depending on the rotation direction, it is configured to be easily peeled by receiving a large load in the peeling direction from the rotating disk.

  The present invention has been devised as a solution to the above-described problems, and the problem to be solved by the present invention is to increase the peel prevention strength of the seat body with respect to the turntable and floor.

In order to solve the above problems, the vehicle seat of the present invention takes the following means.
A first invention is a vehicle seat connected to a floor so that a seat body can be rotated outward or inward with respect to a vehicle traveling direction via a turntable. The turntable includes a fixed body integrally coupled to a support base on the floor, and a rotary body assembled to the fixed body so as to be relatively rotatable. The seat body is provided such that the bottom surface portion of the seat cushion serving as a seating portion is integrally coupled to the upper surface portion of the rotating body. In the coupling structure between the sheet main body and the upper surface of the rotating body, at least three coupling points for integrally coupling the sheet main body and the rotating body are set. The seat body or the rotating body and the support base are integrally connected in the vertical direction and freely in the rotational direction within a virtual triangle forming area formed by connecting specific three points of the plurality of connecting points. Reinforcing points to be set are set.

  According to the first aspect of the invention, the reinforcing point is set in the formation region of the virtual triangle formed by connecting the three specific coupling points, so that the load in the direction in which the sheet main body is peeled from the floor is applied. Regardless of the direction from the front, back, left, and right, any coupling point forming the virtual triangle is always present at a position closer to the load input point than the reinforcement point. Therefore, the input load described above is always applied to one of the three specific coupling points arranged closer to the load input point than the reinforcement point, and is transmitted to the support base via the reinforcement point. Supported. Thus, by arranging the reinforcing points at the positions surrounded by the specific three coupling points, it is possible to increase the peel prevention strength of the seat body with respect to the rotating disk and the floor.

  Next, a second invention is a reinforcing structure comprising a combination of three connecting points forming a virtual triangle and reinforcing points set in a region surrounded by the three connecting points in the first invention described above. Is arranged on the outer peripheral side of the annular connecting structure part constituting the rotatable connecting structure to the fixed body of the rotating body, and in each of the circumferential regions on the front, rear, left and right with respect to the rotation center of the rotating body. Is provided.

  According to the second aspect of the invention, the reinforcing structure composed of the combination of the specific three coupling points and the reinforcing points is closer to the outer peripheral side than the annular connecting structure portion that constitutes the connecting structure of the rotating body and the fixed body. And, by being arranged so as to be arranged in each of the circumferential regions on the front, rear, left and right with respect to the rotation center of the rotating body, the load in the direction of peeling from the floor to the seat body is inputted from any direction of front, rear, left and right However, this load is always applied to the support base and supported by any one of the three specific coupling points arranged closer to the load input point than the connecting structure portion. Accordingly, it is possible to further increase the peel prevention strength of the seat body with respect to the turntable and floor.

  Next, a third invention is a reinforcing structure comprising a combination of three connecting points forming a virtual triangle and reinforcing points set in a region surrounded by the three connecting points in the second invention described above. Is set in the four corner regions of the front, rear, left and right of the rotating body.

  According to the third aspect of the invention, the reinforcing structure formed by the combination of the specific three coupling points and the reinforcing points is set in the four corner regions of the front, rear, left and right of the rotating body, so that the inner side of the seat cushion is When the seat belt device buckle is provided on the rear side, or when the seat belt outlet is set at the shoulder opening of the seat back, the seat body has a stronger peeling prevention strength against the turntable and floor. Can be increased. That is, by the arrangement configuration described above, even if a strong tensile load acting in the direction of peeling the seat body on the shoulder of the buckle or the seat back is applied when the front collision of the vehicle occurs, these loads are It is because it will always be supported by the reinforcement structure arrange | positioned in the circumferential direction position near those load input points.

1 is an exploded perspective view illustrating a configuration of a vehicle seat according to Embodiment 1. FIG. It is an external view of a vehicle seat. It is the model showing the structure of the rotation stopping mechanism. It is a top view of a turntable. It is the VV sectional view taken on the line of FIG. It is a schematic diagram showing the arrangement | positioning relationship between each virtual triangle and a reinforcement point. FIG. 5 is a schematic diagram illustrating a state in which the sheet main body is rotated outward from the state illustrated in FIG.

  EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated using drawing.

  First, the configuration of the vehicle seat according to the first embodiment will be described with reference to FIGS. As shown in FIG. 2, in the vehicle seat of the present embodiment, a seat body 1 is provided on a floor F via a turntable 10, and the turntable 10 allows the seat body 1 to be connected to a vehicle. It is configured to be able to rotate horizontally outward or inward with respect to the traveling direction. Here, the turntable 10 is normally in a state in which the rotational movement of the seat body 1 is stopped, and the angle adjustment lever 6A provided on the outer side of the seat body 1 is lifted or the reclining lever 6B is lifted. The seat body 1 can be switched to a state in which the seat body 1 can be rotated horizontally by an operation of tilting the seat back 2 forward.

  Here, the seat body 1 includes a seat back 2 that serves as a backrest, a seat cushion 3 that serves as a seating portion, and a headrest 4 that serves as a support for the head. The angle adjustment lever 6 </ b> A is provided on a side portion on the outer side (door entrance / exit side) of the seat cushion 3, and can be pulled up while the seated person is seated on the seat body 1. And the rotation stop state of the above-mentioned turntable 10 is cancelled | released by pulling-up operation of this angle adjustment lever 6A. The rotation stop structure of the turntable 10 will be described in detail later.

  The reclining lever 6B is provided on the outer side (door entrance / exit side) of the seat cushion 3, more specifically, at a position on the rear side closer to the waist of the seated occupant than the angle adjusting lever 6A described above. The user can perform the pulling up operation while sitting on the seat body 1. This reclining lever 6B releases the fixed state (locked state) of the reclining device 5 on each side that fixes the backrest angle of the seat back 2 with respect to the seat cushion 3 during normal operation, The seat back 2 is switched to a state in which the backrest angle can be adjusted.

  Here, the seat back 2 is always urged in the direction of rotating forwardly by an urging force of an urging spring (not shown) hooked between the seat back 2 and the seat cushion 3. As a result, the seat back 2 is folded down to the position where it is folded into the upper surface of the seat cushion 3 by the operation of the reclining lever 6B in a state where the seated person is not seated on the seat body 1. It is like that. Then, as the seat back 2 is folded into the upper surface of the seat cushion 3, the rotation stop state of the rotating disk 10 is released.

  As shown in FIG. 1, the above-described seat body 1 is provided with a frame-shaped cushion frame 3 </ b> A that forms a skeleton of the seat cushion 3 connected to a floor F via a rotating disk 10 and a lateral slider device 30. It has been. Here, the horizontal slider device 30 is provided on a pair of front and rear lower rails 31 fixedly installed on the floor F, a pair of front and rear upper rails 32 slidably assembled to the lower rails 31, and the upper rails 32. A locking device (not shown) that locks the sliding movement of each upper rail 32 by engagement with each lower rail 31 is provided.

  Specifically, each of the lower rails 31 described above is integrally fixed to the upper surface portions of a pair of horizontally long support bases 8 fixedly provided on the floor F. In addition, the upper rail 32 is normally held in a state in which sliding movement with respect to each lower rail 31 is restricted by a configuration in which the above-described locking device (not shown) is held in a locked state by urging. The slide lock state of the upper rails 32 is released by operating a release lever (not shown) to release the lock state of each lock device.

  Here, as shown in FIG. 5, each of the lower rails 31 described above is formed by bending one metal plate upward in a substantially U shape, and further opening the upper end side thereof. Each is formed into a shape bent downward toward the inside of the opening. Each of the lower rails 31 is provided such that a bottom surface portion thereof is bolted to an upper surface portion of the support base 8 and is integrally fixed. Each of the upper rails 32 has a single metal plate bent downward in an inverted U shape, and the opening ends on the lower ends thereof are bent back upward on both sides. It is formed in the shape.

  And each upper rail 32 is enclosed in the U shape inside each lower rail 31 so as not to peel upward from each lower rail 31 by being fitted in the longitudinal direction from the opening end on one side in the longitudinal direction. Thus, it can be assembled so as to be slidable in the longitudinal direction. Next, the rotary disk 10 has a configuration in which a hollow disk-shaped fixed body 11 and a rotary body 12 are assembled so as to be relatively rotatable around a rotation center 10R.

  Here, the above-described fixed body 11 is integrally connected to the upper surface portion of each upper rail 32 of the horizontal slider device 30 described above. Specifically, the fixed body 11 has four portions in the circumferential direction of the disk portion at two portions on the left and right sides of the upper surface portion of each upper rail 32 by a fastening structure with a coupling pin 32A and a fastener 32B. It is fastened and fixed in the form of being sandwiched up and down.

  On the other hand, the rotating body 12 is integrally connected to the bottom surface of each side frame 3A1 of the cushion frame 3A. Specifically, as shown in FIG. 4, the rotating body 12 has the four front and rear, right and left corners of the disk portion at two front and rear portions of the bottom surface of each side frame 3A1 of the cushion frame 3A. Each of the coupling pins P1 and the fastener Q1 is fastened and fixed so as to be sandwiched vertically (see FIG. 5).

  Further, the rotating body 12 has a configuration in which the peeling prevention strength with respect to the floor F is enhanced by a reinforcing structure by four reinforcing pins R that respectively engage with four reinforcing brackets 13 described later. Here, as shown in FIG. 5, the rotating body 12 is formed by overlapping two upper and lower plate members (an upper plate member 12 </ b> A and a lower plate member 12 </ b> B) having a large round opening at the center, The outer peripheral edge of the fixed body 11 formed in a hollow disk shape is inserted into the gap between the inner peripheral edge of the upper plate 12A and the inner peripheral edge of the lower plate 12B. It is assembled in a state of being supported so as to be rotatable.

  Specifically, the rotating body 12 is formed in a shape in which the inner peripheral edge of the lower plate 12B is bent back like a bowl over the entire circumference, while the fixed body 11 The peripheral edge portion is formed in a shape that is bent back like a bowl over the entire circumference. Then, the hook shape of the outer peripheral edge of the fixed body 11 is multiplied by the hook shape of the inner peripheral edge of the lower plate member 12B on the lower side of the rotating body 12 and the upper surface of the outer peripheral edge of the fixed body 11 is covered. In this way, the plate member 12A on the upper side of the rotating body 12 is set, so that the rotating body 12 is relatively rotatable with respect to the fixed body 11 and is prevented from being peeled upward by the hooked structure described above. It is assembled.

  The rotating body 12 is configured such that the upper plate member 12A is supported on the fixed body 11 from the lower side by being set on the outer peripheral edge of the fixed body 11 and supported from the lower side. It is assembled. Here, between the lower plate 12B, the fixed body 11, and the upper plate 12A of the rotating body 12 assembled in the above-described laminated form, bearings 12C are distributed at a plurality of locations in the circumferential direction, respectively. Is provided. Thereby, the sliding frictional resistance force accompanying the relative rotation generated between the rotating body 12 and the fixed body 11 is reduced, and the rotational movement of the rotating body 12 with respect to the fixed body 11 can be performed smoothly. ing.

  By the way, as shown in FIG. 3, the above-described rotating body 12 is provided with a rotation stopping mechanism 40 that can lock the rotational movement of the rotating body 12 relative to the fixed body 11 by engagement with the fixed body 11. ing. The anti-rotation mechanism 40 includes an arm-like hook 41 rotatably connected to the rotating body 12 by a support shaft 42, a tension spring 43 that urges the hook 41 to rotate, and an urging force of the hook 41 to the tension spring 43. The release cable 44 is operated to rotate against this.

  The hook 41 has an engagement tooth 41A formed at the tip of the arm, and is normally formed in the fixed body 11 by being urged to rotate clockwise by the urging force of the tension spring 43. It is pressed against the engaging teeth 11A and held in a meshed state. Thereby, the rotational movement of the rotating body 12 with respect to the fixed body 11 is held in a restricted state. Then, when the release cable 44 is operated, the hook 41 is rotated in a direction (in the counterclockwise direction in the drawing) in which the hook 41 is disengaged from the engagement teeth 11A of the fixed body 11, and the rotating body 12 is moved. Release the rotation lock state.

  Here, the engaging teeth 11A of the fixed body 11 can lock the rotational movement of the rotating body 12 by engaging the engaging teeth 41A of the hook 41 when the seat body 1 is in the rotational position state shown below. Is formed. That is, first, the engaging teeth 11A of the fixed body 11 have a rotational position when the seat body 1 faces the front of the vehicle, 7 degrees outward from the front of the vehicle, and 10.5 degrees inward. The rotary body 12 (sheet main body 1) is formed at a position where the rotational movement of the rotary body 12 (sheet main body 1) can be locked at each rotational position of a pitch of 3.5 degrees within the range of rotation angles.

  As a result, the seat body 1 is rotated 7 degrees outward from the front of the vehicle, three rotational positions from the rotational position facing the front of the vehicle, three rotational positions from this position to 10.5 degrees inward. In two rotational positions up to the predetermined position, each can be seated and used while being rotated. As a result, the seat body 1 is switched to a mode in which the body of the seated person is directed toward the seat next to the side by the inward rotation, and the user can easily interact with the seated person of the seat next to the side. The user can be switched to a mode in which the body of the seated person is directed to the window side of the doorway to make it easy to see the scenery outside the vehicle.

  The engaging teeth 11A of the fixed body 11 are formed at positions where the rotational movement of the rotating body 12 (seat body 1) can be locked at a rotational position where the seat body 1 is rotated 180 degrees outward from the front of the vehicle. ing. As a result, the seat body 1 is switched to a mode (opposite mode) in which the body of the seated person is directed to the rear seat by the rotation of 180 degrees outward to facilitate interaction with the seated person of the rear seat. The seat can be used as a state in which the rotation is stopped.

  When the release cable 44 is operated and the engagement lock state of the hook 41 with respect to the fixed body 11 is released, the rotation stopping mechanism 40 is switched to a state in which the rotating body 12 can be rotated and moved. Is rotated to a desired rotational position, and then the operation of the release cable 44 is released, so that the hook 41 is pressed against the engagement teeth 11A of the fixed body 11 by urging so as to return to the locked state. It has become.

  Here, the release cable 44 allows the hook 41 to be fixed by an operation in which the angle adjusting lever 6A shown in FIG. 2 is pulled up or the seat back 2 is brought down forward by the lifting operation of the reclining lever 6B. The traction operation is performed so as to be disengaged from the engaged state. Here, when the rotation stop state is released by the pulling operation of the angle adjustment lever 6A, the seat main body 1 has a rotatable movable range of 7 degrees outward and 10.5 inward by a restriction mechanism (not shown). It is regulated within an angle adjustment range between degrees.

  Further, the seat body 1 can be rotated from the front of the vehicle to 180 degrees outward when the seat back 2 is tilted forward and the rotation stop state is released by the lifting operation of the reclining lever 6B. It is like that.

  By the way, the sheet main body 1 has a structure in which the peeling prevention strength with respect to the floor F is enhanced by reinforcing the coupling structure with respect to the floor F via the rotating disk 10 as described above. That is, first, as shown in FIG. 4, as described above, in the seat body 1, the cushion frame 3 </ b> A and the rotating body 12 are provided at four locations in the circumferential direction by the four coupling pins P <b> 1 and the fasteners Q <b> 1. The cushion frame 3A and the rotator 12 are also integrally fastened at the respective positions, but the cushion frame 3A and the rotating body 12 are also connected in the circumferential direction by the four coupling pins P2 and P3 and the fasteners Q2 and Q3. It is fastened integrally at each position.

  Here, four reinforcing brackets 13 curved in the shape of an arc drawn around the rotation center 10R of the rotating body 12 are attached to the lower surface portion of the lower plate 12B of the rotating body 12 described above. These reinforcing brackets 13 are arranged side by side at four positions in the circumferential direction on the same circumference. The four coupling pins P2 and P3 and the fasteners Q2 and Q3 described above are formed on the reinforcing brackets 13 so as to fasten the four reinforcing brackets 13 to the lower surface of the lower plate 12B. One end in the circumferential direction or the other end, the lower plate 12B of the rotating body 12, the upper plate 12A, and the constituent members of the cushion frame 3A are integrally sandwiched in the vertical direction. It is concluded.

  Specifically, each of the four coupling pins P1 and the fastener Q1 respectively superimpose the front and rear, left and right four corner regions of the rotating body 12 and the bottom surface of each side frame 3A1 of the cushion frame 3A. It is fastened in an integrated state. Further, each of the two connecting pins P2 and the fastener Q2 on the rear side in the figure are respectively the end of the reinforcing bracket 13, the rotating body 12, and the rear side reinforcement which is a frame frame on the rear side of the cushion frame 3A. The bottom portion of the rear support bracket 3A4 joined to the two left and right portions of the pipe 3A3 is integrally fastened in a state of being overlapped with each other.

  In addition, each of the two coupling pins P2 and the fastener Q2 on the front side in the figure are respectively the end portion of the reinforcing bracket 13, the rotating body 12, and the front side reinforcing pipe 3A2 which is a frame frame on the front side of the cushion frame 3A. The bottom part of the front support bracket (not shown) joined to the two left and right parts is integrally fastened in a superposed state. In addition, each of the four coupling pins P3 and the fastener Q3 is a state in which the end portion of each reinforcing bracket 13, the rotating body 12, and the bottom surface portion of each side frame 3A1 of the cushion frame 3A are overlapped with each other. It is concluded as one.

  Here, as shown in FIG. 5, each of the reinforcing brackets 13 is formed by bending a single metal plate downward in a substantially U shape, and further opening ends on the lower ends thereof. It is formed in a shape bent back toward the inside of the opening. Then, in the U-shape of each reinforcing bracket 13, the heads Ra of the four reinforcing pins R provided so as to be prevented from coming off upward with respect to the support base 8 are respectively in a state of entering. Are assembled.

  Here, each of the reinforcing pins R described above is provided through the upper rail 32 and the lower rail 31 of the horizontal slider device 30 in the height direction, and the fastener S coupled to the lower end portion thereof, The support base 8 is provided in a state of being prevented from coming off upward. As a result, the reinforcing brackets 13 integrally fastened to the rotating body 12 are respectively moved upward by the head portions Ra of the reinforcing pins R provided in a state in which the reinforcing brackets 13 are prevented from being detached upward with respect to the support base 8. It is in a state of being prevented from coming off so as not to be peeled to the side, and by this retaining structure, the peel prevention strength of the sheet body 1 with respect to the support base 8 is enhanced.

  Here, each of the reinforcing pins R described above is normally in a state in which the claw portion Rb formed to protrude from the outer peripheral surface of the shaft portion is in contact with the upper surface portion of the upper rail 32 and supported from below. As a result, each head portion Ra is held in a posture of floating upward so as not to come into contact with each reinforcing bracket 13. Thereby, when the rotary body 12 rotates with respect to the fixed body 11, a frictional resistance force caused by sliding is not generated between the reinforcing brackets 13 and the reinforcing pins R.

  Here, the lower rail 31 of the lateral slider device 30 described above is provided integrally fixed on the support base 8 with its bottom surface being in contact with the upper surface of the support base 8. Each reinforcing pin R is coupled to the fastener S at the lower end portion that penetrates the bottom surface portion of each lower rail 31 and the upper surface portion of the support base 8. Thereby, the reinforcement pin R is in a state where it is prevented from coming off upward due to the support strength of the bottom surface portion of the lower rail 31, and the peel prevention strength of the rotating body 12 with respect to the support base 8 is further increased. ing.

  Here, the hole shape of the bottom surface portion of the lower rail 31 through which each reinforcing pin R is penetrated and the upper surface portion of the support base 8 is formed in a shape extending straight along the longitudinal direction of the lower rail 31. Accordingly, the lateral slide movement of the upper rail 32 with respect to the lower rail 31 is not hindered by the reinforcing pins R provided so as to pass through the upper rail 32 and the lower rail 31. In addition, each reinforcing pin R regulates the upward movement of each reinforcing bracket 13 by the above-described assembly structure, but does not follow the rotational movement of each reinforcing bracket 13 and rotates each reinforcing bracket 13. It is configured to escape movement.

  By the way, returning to FIG. 4, each of the reinforcing brackets 13 described above overlaps with the head portion Ra of each reinforcing pin R in the circumferential direction when the seat body 1 is in a rotational position state facing the front of the vehicle. It is provided as follows. Thus, the head portion Ra of each reinforcing pin R is coupled to each coupling pin P2 that fastens each reinforcing bracket 13 to the rotating body 12 and the cushion frame 3A when the seat body 1 is facing the front of the vehicle. It is in a state of being arranged in each region in the circumferential direction between the pins P3.

  The positional relationship in which each head portion Ra of each reinforcing pin R is disposed in each circumferential region between each connecting pin P2 and each connecting pin P3 is such that each reinforcing bracket 13 is long in the circumferential direction. Due to the shape, the sheet main body 1 is maintained even if it is rotated and moved within the angle adjustment range between 7 degrees outward and 10.5 degrees inward. . As a result, in the rotational movement region described above, the head portions Ra (reinforcement points) of the respective reinforcing pins R are respectively connected to the connecting pins P2 and P3 on the respective sides and the connecting pins P1 located on the outer peripheral side thereof. The state of being arranged in each formation region of the virtual triangles TR1 to TR4 formed by connecting the three coupling points is maintained (see FIG. 6).

  Here, as shown in FIG. 6, the three coupling points (coupling pins P <b> 1 to P <b> 3) that form the four virtual triangles TR <b> 1 to TR <b> 4 described above, and the region surrounded by these three coupling points Reinforcing structures composed of combinations of reinforcing points (reinforcing pins R) arranged on the ring respectively are annular regions constituting the rotatable connecting structure of the rotating body 12 and the fixed body 11 described above with reference to FIG. Disposed on the outer peripheral side of (the connecting structure portion M) and distributed in the respective circumferential regions at the four corners on the front, rear, left and right with respect to the rotation center 10R of the rotating body 12.

  As described above, the four reinforcing pins R are disposed in the region surrounded by the virtual triangles TR1 to TR4 that integrally fasten the rotating body 12 and the cushion frame 3A. Regardless of whether the load applied to the main body 1 in the direction of peeling from the floor F is applied from any of the front, rear, left, and right directions, the connection points (connection pins P1 to P3) that form the virtual triangles TR1 to TR4 are always provided. One of them receives an input load at a position closer to the load input point than the reinforcing point (reinforcing pin R).

  Therefore, regardless of the front, rear, left, or right direction, a load in the direction of peeling from the floor F is applied to the seat body 1 due to the occurrence of a vehicle collision or the like. ) Is placed at a position closer to the load input point than any of the connection points (connection pins P1 to P3) forming one of the virtual triangles TR1 to TR4, and is transmitted from there to each reinforcement pin R to be supported. It will be supported by the base 8.

  Specifically, as described above, the three coupling points (coupling pins P1 to P3) forming the four virtual triangles TR1 to TR4 are respectively connected to the connecting structure portion M between the rotating body 12 and the fixed body 11. Is set at a position on the outer peripheral side, so that the input load is always closer to the load input point than the connecting structure portion M, regardless of whether the input load is applied from the front, rear, left, or right direction. From any one of the coupling points (coupling pins P1 to P3) at the position of (2), it is transmitted to and supported by the support base 8 via the reinforcement point (reinforcement pin R).

  As described above, the peeling load applied to the sheet main body 1 can be received at a position closer to the outer peripheral side near the load input point than the connection structure portion M of the rotating body 12 and the fixed body 11. It is possible to reduce the load applied to the connecting structure portion M between the fixed body 11 and the fixed body 11. Therefore, the peeling prevention strength with respect to the turntable 10 and the floor F of the sheet body 1 can be further increased. Returning to FIG. 4, the above-described reinforcing structure is configured such that the buckle 7 of the seat belt device is provided on the rear side portion of the side frame 3 </ b> A <b> 1 on the inner side (inner side) of the cushion frame 3 </ b> A as in the vehicle seat of the present embodiment. Effectively increases the anti-separation strength of the seat body 1 when a vehicle front collision occurs in a connected one or a seatbelt outlet 2A set on the outer shoulder of the seat back 2 It is configured to be able to.

  That is, in the case where the buckle 7 of the seat belt device is connected to the back side portion inside the cushion frame 3A, when a vehicle front collision occurs, the seating occupant is caused to act forward by an inertial force. The seat belt is pulled, and a force (tensile load L1) is applied to pull the buckle 7 upward with a strong force. Accordingly, a strong peeling load is applied in the direction of peeling the cushion frame 3A (seat body 1) from the floor F at the connecting point of the connecting shaft 7A connecting the buckle 7 to the side frame 3A1.

  However, this peeling load is a reinforcing structure by connecting points (connecting pins P1 to P3) and reinforcing points (reinforcing pins R) that form a virtual triangle TR3 set at the inner rear portion where the buckle 7 is provided. By this, it will be received in the position near the buckle 7 which becomes a load input point. Further, in the case where the seat belt outlet 2A is set in the shoulder portion of the seat back 2, the seat belt is caused by the action of an inertial force that causes the seated occupant to be thrown forward when a vehicle front collision occurs. Is pulled, and a force (tensile load L2) is applied that pulls the shoulder portion on the outside of the seat back 2 where the pull-out port 2A is set to the front side with a strong force.

  As a result, the seat body 1 is placed on the floor F from the outside rear portion of the cushion frame 3A of the seat cushion 3 connected to the seat back 2 by the force with which the outer shoulder portion of the seat back 2 is pulled forward. A strong peeling load in the direction of peeling is applied. However, this peeling load is reinforced by the connection points (connection pins P1 to P3) and the reinforcement points (reinforcement pins R) that form the virtual triangle TR4 set at the outer rear portion where the above-described outlet 2A is provided. Depending on the structure, it is received at a close position below the outlet 2 </ b> A serving as a load input point.

  By the way, as shown in FIG. 7, when the seat body 1 is rotated 180 degrees outward from the front of the vehicle, the four reinforcing brackets 13 are again inserted into the U-shaped reinforcement pins. An arrangement state in which the heads Ra of R are respectively inserted is adopted. As a result, even when the seat body 1 is used while being reversed to the vehicle rear side, the above-described reinforcement structure supports the seat body 1 so as not to be peeled off from the floor F.

  As mentioned above, although the embodiment of the present invention has been described using one example, the present invention can be implemented in various forms in addition to the above example. For example, the reinforcing pin R is provided in a state where the reinforcing pin R passes through the upper rail 32 and the lower rail 31 of the horizontal slider device 30 in the height direction and is secured to the support base 8 fixedly installed on the floor F. However, the reinforcing pin (reinforcing point) may be directly connected to the support base or the floor panel and prevented from coming off without using the horizontal slider device. Further, the seat main body 1 may be directly coupled to the support base 8 by the reinforcement pin R (reinforcement point) to prevent the separation by attaching the reinforcement bracket 13 to the cushion frame 3A.

  In the above-described embodiment, the horizontal slider device 30 that slides the seat body 1 in the vehicle width direction is shown. However, instead of the horizontal slider device, a vertical slider device that slides the seat body in the vehicle longitudinal direction may be applied. Good. In this case as well, the lower pin rail support strength is utilized by providing a reinforcing pin (reinforcing point) that passes through the upper rail and lower rail of the vertical slider device and prevents it from being removed from the support base fixed on the floor. Thus, the peel prevention strength of the sheet body can be increased.

  Further, a reinforcing structure composed of a combination of a virtual triangle (TR1 to TR4) formed by connecting three connecting points (connecting pins P1 to P3) and a reinforcing point (reinforcing pin R) is a rotating body 12 and a fixed body 11. Are shown in the circumferential region portions at the four corners of the front, rear, left and right of the outer peripheral side of the annular connection structure portion M constituting the rotatable connection structure. It is not particularly limited. Moreover, the above-described virtual triangle may be set so as to straddle the rotation center of the turntable.

DESCRIPTION OF SYMBOLS 1 Seat main body 2 Seat back 2A Drawer 3 Seat cushion 3A Cushion frame 3A1 Side frame 3A2 Front side reinforcement pipe 3A3 Rear side reinforcement pipe 3A4 Rear side support bracket 4 Headrest 5 Reclining device 6A Angle adjustment lever 6B Reclining lever 7 Buckle 7A Connecting shaft 8 Support base 10 Turntable 10R Rotation center 11 Fixed body 11A Engagement tooth 12 Rotating body 12A Upper plate 12B Lower plate 12C Bearing 13 Reinforcement bracket 30 Horizontal slider device 31 Lower rail 32 Upper rail 32A Connecting pin 32B Fastener 40 Rotation stop mechanism 41 hook 41A engagement tooth 42 support shaft 43 tension spring 44 release cable M connecting structure TR1 to TR4 virtual triangle P1, P2, P3 connecting pin Q1, Q2, Q3 fastener R Reinforcement pin Ra Head Rb Claw S S Fastener F Floor L1, L2 Tensile load

Claims (3)

A vehicle seat connected to the floor so that the seat body can rotate outward or inward with respect to the vehicle traveling direction via a turntable;
The turntable includes a fixed body integrally coupled to a support base on a floor, and a rotary body assembled to the fixed body so as to be relatively rotatable, and the seat body is a bottom portion of a seat cushion serving as a seating portion. Is integrally coupled to the upper surface of the rotating body,
At least three coupling points for integrally coupling the sheet main body and the rotating body are set in the coupling structure of the sheet main body and the upper surface of the rotating body, and specific three points among the plurality of coupling points are set. Reinforcing points for connecting the seat body or the rotating body and the support base integrally in the vertical direction and freely in the rotational direction are set in the formation region of the virtual triangle formed by connecting the two. A vehicle seat characterized by the above. The vehicle seat according to claim 1,
A reinforcing structure comprising a combination of three connecting points forming the virtual triangle and reinforcing points set in a region surrounded by the three connecting points constitutes a rotatable connecting structure for the fixed body of the rotating body. A vehicle seat characterized in that the vehicle seat is disposed on the outer peripheral side of the annular connecting structure portion and in each of the front, rear, left and right circumferential regions with respect to the rotation center of the rotating body. The vehicle seat according to claim 2,
Reinforcing structures composed of a combination of three connecting points forming the virtual triangle and reinforcing points set in an area surrounded by the three connecting points are set in the four front and rear, right and left corner regions of the rotating body. A vehicle seat characterized by comprising:

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