JP6584317B2 - Vehicle seat device - Google Patents

Description

  The present invention relates to a vehicle seat device including a rotation mechanism that rotates a seat installed on a floor of a vehicle body between a seating position facing the front of the vehicle and a boarding / alighting position facing a door opening side on the side of the vehicle. About.

  In a welfare vehicle, for example, in order to make it easy for passengers to get on and off, for example, the rotation of rotating the seat on the passenger seat side between the seating position facing the front of the vehicle and the boarding / exiting position facing the door opening on the side of the vehicle A seat device having a mechanism has been developed (see, for example, Patent Document 1).

  As a rotation mechanism in this type of vehicle seat device, for example, as disclosed in Patent Document 1, a rotation plate is rotatably disposed on a floor of a vehicle body via a rotation member, and a seat is mounted thereon. The Then, a motor having an arc-shaped rack gear on the floor side and a pinion gear meshing with the rack gear on the rotating plate side is attached, whereby the rotating plate is driven to rotate between the seating position and the getting on / off position with the rotating member as the rotation center. Is done.

  The arc-shaped rack gear in the rotating mechanism is arranged so that the center of the arc coincides with the rotation center of the rotating plate, and the gear is used to rotate the seat by about 90 ° between the seating position and the getting-on / off position. The rotation angle (center angle of the arc) is 90 ° + α.

JP2015-39990A

  In a vehicle seat device including a rotation mechanism, it is desired that safety and dust resistance can be easily ensured.

  In the conventional vehicle seat device described above, when the rotating plate is rotated, a part of the rack gear provided on the floor side may protrude from the rotating plate of the seat and be exposed to the outside. As a dust-proof measure, it is necessary to provide a cover. Further, the rack gear requires a rotation angle of 90 ° + α, and the circumference of the gear is long and the size is large, so that a large installation space is taken.

  One of the objects of the present invention is to provide a vehicle seat device that can easily ensure safety and dust resistance.

  (1) A vehicle seat device according to an aspect of the present invention is configured such that a seat installed on a floor of a vehicle body has a seating position facing the front of the vehicle and a boarding / alighting position facing the door opening on the side of the vehicle. A rotation mechanism that rotates between them is provided. The rotating mechanism includes a support base, a turning base, a turning bearing, a turning gear, a motor, and a turning pin. The support base is disposed on the floor. The swivel base is disposed on the support base and the seat is installed. The slewing bearing rotatably supports the slewing base on the support base and has a rotation center of the seat. The swivel gear is provided on the swivel base, and has an arcuate gear portion, an arm portion extending from the gear portion toward the center of the arc, and the arm portion being rotatable at the arc center position of the gear portion. And a shaft portion pivotally supported on the turning base, and the shaft portion is disposed at a position deviated from the rotation center of the seat. The motor is provided on the turning base, has a drive gear that meshes with a gear portion of the turning gear, and rotationally drives the drive gear. The swivel pin is provided on the support base so as to protrude toward the swivel base, and is disposed at a position eccentric from the rotation center of the seat. In the middle of the arm portion of the swivel gear, there is an engaging portion to which the swivel pin is connected. Then, when the motor is driven to rotate the drive gear and the swivel gear swings between one end side and the other end side of the gear portion with the shaft portion as a rotation center, When the engaging portion pushes the swivel pin, the swivel base rotates around the rotation center of the swivel bearing.

  According to the above vehicle seat device, the turning gear and the motor for rotation are attached to the turning base on the seat side, so that the turning gear (gear part) is exposed to the outside when the turning base is rotated. Can be prevented, and safety and dust resistance can be easily secured.

  Further, the shaft portion serving as the rotation center of the turning gear is provided at a position shifted from the rotation center of the seat, and the turning pin is provided at a position eccentric from the rotation center of the seat (the rotation center of the turning bearing). And a turning pin is connected with the engaging part provided in the middle of the arm part of a turning gear, and the link structure of the axial part and turning pin of a turning gear is comprised. Due to the lever ratio of this link structure, the rotation angle (center angle) of the gear portion of the turning gear can be made smaller than 90 °. Since the rotation angle of the gear portion can be smaller than 90 °, the circumference of the gear portion can be shortened to reduce the size of the turning gear, so that the space for installing the turning gear can be saved. Therefore, the swivel gear can be stored compactly in the swivel base without protruding from the swivel base. “Lever ratio” is the ratio (X / Y) of the distance X from the center of rotation of the seat to the center of the engaging portion (swivel pin) and the distance Y from the center of the pivot pin to the center of the shaft of the swivel gear. (Details will be described later).

1 is a schematic perspective view showing an overall configuration of a vehicle seat device according to Embodiment 1. FIG. 1 is a schematic side view illustrating an overall configuration of a vehicle seat device according to a first embodiment. It is a schematic perspective view which shows the structure of the rotation mechanism in the vehicle seat apparatus which concerns on Embodiment 1. FIG. It is a schematic perspective view which shows the structure of the rotation mechanism in the vehicle seat apparatus which concerns on Embodiment 1. FIG. It is a schematic top view which shows the structure of the rotation mechanism in the vehicle seat apparatus which concerns on Embodiment 1. FIG. It is a schematic top view which shows the state which the turning base of the rotation mechanism in the vehicle seat apparatus which concerns on Embodiment 1 rotated 45 degrees. It is a schematic top view which shows the state which the turning base of the rotation mechanism in the vehicle seat apparatus which concerns on Embodiment 1 rotated 60 degrees. FIG. 3 is a schematic top view illustrating a state in which a turning base of a rotation mechanism in the vehicle seat device according to the first embodiment is rotated by 90 °. It is a principal part top view which expands and shows the engaging part of FIG.

  Hereinafter, a specific example of a vehicle seat device according to an embodiment of the present invention will be described with reference to the drawings. The same reference numerals in the figure indicate the same names. In the following description, “front”, “rear”, “left”, “right”, “upper”, and “lower” mean the front of the vehicle as “front” and the direction based on this. In the figure, FR is the front in the vehicle front-rear direction, RR is the rear, LH is the left in the vehicle left-right direction (vehicle width direction), RH is the right, UP is the vehicle up-down direction, and LWR is the bottom.

[Embodiment 1]
{Overall configuration of vehicle seat device}
With reference to FIGS. 1-9, the vehicle seat apparatus which concerns on Embodiment 1 is demonstrated. The vehicle seat device 1 is installed on a floor F of a vehicle body as shown in FIGS. 1 and 2, and a seat (not shown) is attached thereon. The vehicle seat device 1 shown in FIGS. 1 and 2 includes a support base 210, a rotation mechanism T, and a lifting slide mechanism R. The support base 210 is disposed on the floor F. The rotation mechanism T is disposed on the support base 210 and rotates the seat between a seating position facing the front of the vehicle and a boarding / alighting position facing the door opening side on the side of the vehicle. The lift slide mechanism R is disposed on the rotation mechanism T and slides up and down in the vehicle left-right direction with the seat rotated to the boarding / alighting position. One of the features of the vehicle seat device 1 is the structure of the rotation mechanism T. In this example, the seat mounted on the vehicle seat device 1 is a seat installed on the left side (passenger seat side) of the vehicle body, and a door opening is provided on the left side of the seat. Below, the rotation mechanism T which is the feature point of the vehicle seat apparatus 1 will be described in detail, and the elevation slide mechanism R will be briefly described.

<Support base>
As shown in FIGS. 1 and 2, the support base 210 is supported on a pair of left and right fixing members 201 extending in the front-rear direction, and is disposed on the floor F. The fixing member 201 is fixed below the floor F of the vehicle body as shown in FIG. The support base 210 may be slidably supported by the fixing member 201, and the support base 210 may be installed so as to be slidable in the front-rear direction with respect to the fixing member 201. Thereby, the seat can be slid in the vehicle front-rear direction. In this case, a motor can be attached to the support base 210 and can be configured to be electrically slid and moved.

<Rotation mechanism>
As shown in FIGS. 1 and 2, the rotation mechanism T includes a turning base 10 that is disposed on a support base 210 and is rotatably supported via a turning bearing 20 (see FIG. 2). The rotation mechanism T can horizontally rotate the turning base 10 between the seating position and the boarding / alighting position about the rotation center of the turning bearing 20. A detailed configuration of the rotation mechanism T will be described later.

<Elevating slide mechanism>
As shown in FIGS. 1 and 2, the elevating slide mechanism R includes an elevating slide base 310 that is disposed on the turning base 10 and is slidably supported with respect to the turning base 10. In this example, a rectangular frame 15 is integrally provided on the turning base 10, and lift rails 311 that are inclined downward toward the front are provided on the left and right sides of the frame 15. The elevating slide base 310 is supported by a roller 312 that is fitted to the elevating rail 311, and the elevating slide base 310 is slidably attached along the elevating rail 311. A rectangular frame-shaped frame 315 is integrally provided on the lift slide base 310, a seat is fixed to the frame 315, and a seat is placed on the lift slide base 310. The elevating / sliding mechanism R includes a drive shaft 316 and a driven shaft 317 that are arranged at intervals in the slide direction, and a chain 320 that is wound between the drive shaft 316 and the driven shaft 317. The drive shaft 316 and the driven shaft 317 are provided on the frame 15 of the turning base 10. A sprocket (not shown) is attached to each of the drive shaft 316 and the driven shaft 317, and a motor ( (Not shown) is attached. One end of the chain 320 is fixed to the first connection point 321 of the elevating slide base 310, and the other end of the chain 320 is fixed to the second connection point 322. The drive shaft 316 rotates and the chain 320 is driven. As a result, the elevating slide base 310 is driven back and forth. With such a configuration, the elevating slide mechanism R lowers the seat rotated to the boarding / exiting position by the rotation mechanism T while moving it forward from the door opening to the outside of the passenger compartment, and retracts from the lowered state to the inner side of the passenger compartment. Can be raised. As the elevating slide mechanism R, a known technique can be adopted.

<Details of rotating mechanism>
Hereinafter, the configuration of the rotation mechanism T will be described in detail with reference to FIGS.

  The rotation mechanism T includes a support base 210 disposed on the floor F and a turning base 10 disposed on the support base 210. In this example, as described above, the elevation slide mechanism R is interposed between the rotation mechanism T and the seat, and the seat is installed above the turning base 10 via the elevation slide base 310. The rotation mechanism T includes a turning bearing 20, a turning gear 30, a motor 40, and a turning pin 50.

(Slewing bearing)
The slewing bearing 20 rotatably supports the slewing base 10 on the support base 210 and has a center of rotation of the seat. As shown in FIG. 2, the slewing bearing 20 is attached so as to be interposed between the support base 210 and the slewing base 10. As shown in FIG. 5, the slewing bearing 20 is an annular member having an inner ring 21 and an outer ring 22 fitted to the outside thereof, and a plurality of balls are formed in an annular space formed between the inner ring 21 and the outer ring 22. Is rotatably incorporated, and an outer ring 22 is rotatably provided with respect to the inner ring 21. The lower end surface of the inner ring 21 is fixed to the support base 210 with bolts, and the upper end surface of the outer ring 22 is fixed to the turning base 10 with bolts. The central axis of the inner ring 21 fixed to the support base 210 is the rotation center of the turning bearing 20, and the outer ring 22 rotates around the inner ring 21, whereby the turning base 10 rotates with respect to the support base 210. That is, the rotation center of the slewing bearing 20 coincides with the rotation center of the seat (point a in FIG. 5). As shown in FIGS. 4 and 5, a circular through hole 12 is formed in the swivel base 10 at a location corresponding to the inner space of the swivel bearing 20 (inner ring 21), and through this through hole 12, A turning pin 50 to be described later protrudes toward the turning base 10.

(Swivel gear)
As shown in FIGS. 3 to 5, the turning gear 30 is provided on the turning base 10 and has an arcuate gear portion 31, an arm portion 32 extending from the gear portion 31 toward the center of the arc, and an arm portion 32. And a shaft portion 33 that is pivotally supported by the turning base 10 at the center of the arc of the gear portion 31. The shaft portion 33 is disposed at a position (point c in FIG. 5) that is shifted from the rotation center a of the sheet. That is, the shaft portion 33 is provided at the center of the arc of the gear portion 31, and the position c of the shaft portion 33 serving as the rotation center of the turning gear 30 is shifted from the rotation center a of the seat.

  Further, in the middle of the arm portion 32 of the turning gear 30, an engaging portion 35 to which a turning pin 50 described later is connected is provided. The engaging portion 35 is configured by providing a protruding piece 35e protruding from the side surface of the arm portion 32 and forming a long hole in the protruding piece 35e. The pivot pin 50 is inserted into and connected to the engaging portion 35 (long hole 35h) provided in the middle of the arm portion 32, whereby a link structure between the shaft portion 33 of the pivot gear 30 and the pivot pin 50 is configured. ing.

(Gear part rotation angle and lever ratio)
The rotation angle (center angle) θ of the gear portion 31 of the swivel gear 30 is smaller than 90 ° as shown in FIG. 5, and is about 30 ° in this example. The rotation angle θ of the gear portion 31 is determined by the lever ratio in the link structure between the shaft portion 33 of the turning gear 30 and the turning pin 50 described above. The “lever ratio” is a ratio (X of the distance X from the rotation center a of the seat to the center b of the turning pin 50 and the distance Y from the center b of the turning pin 50 to the center c of the shaft portion 33 of the turning gear 30). / Y). Here, the rotation angle of the swivel gear 30 when the swivel pin 50 is rotated evenly across the rotation center a of the sheet and the center c of the shaft portion 33 and the sheet is rotated at a rotation angle α (unit: degree) is β When expressed in (unit: degree), the relationship between α and β is represented by [X × sin (α / 2) = Y × sin (β / 2)]. From this relational expression, [sin (β / 2) = (X / Y) × sin (α / 2)] is obtained. From this, β is proportional to (X / Y), and when (X / Y) is smaller than 1, it is smaller than α. That is, when the seat (turning base 10) is rotated by 90 ° by increasing the distance Y (distance between bc) with respect to the distance X (distance between ab), the rotation angle θ of the gear portion 31 is set to 90 °. Can be smaller. The rotation angle θ of the gear unit 31 may be appropriately determined according to the layout of the turning gear 30 and the turning pins 50. From the viewpoint of saving the installation space of the swivel gear 30, it is preferable to design the rotation angle θ of the gear portion 31 to be 45 ° or less, for example.

(motor)
The motor 40 is provided on the turning base 10 as shown in FIGS. 3 and 5, has a drive gear 41 that meshes with the gear portion 31 of the turning gear 30, and rotationally drives the drive gear 41. When the motor 40 is driven and the drive gear 41 rotates, the turning gear 30 (arm portion 32) swings between one end side and the other end side of the gear portion 31 with the shaft portion 33 as the rotation center. When the turning base 10 is not rotating, that is, when the seat is in the seating position, the one end side of the gear portion 31 is positioned so as to mesh with the drive gear 41 of the motor 40 as shown in FIG. On the other hand, in a state where the turning base 10 is rotated by 90 °, that is, in a state where the seat is in the getting-on / off position, the other end side of the gear portion 31 is positioned so as to mesh with the drive gear 41 of the motor 40 as shown in FIG. In this example, when the state where the turning base 10 is not rotating is set as the initial position of the turning gear 30, by rotating the drive gear 41 clockwise by the motor 40 and moving the gear portion 31 counterclockwise, The turning gear 30 (arm portion 32) swings (rotates) forward with respect to the turning base 10 (see FIGS. 6 to 8). On the contrary, when the drive gear 41 is rotated counterclockwise from the state in which the turning gear 30 is swung forward, the swiveling gear 30 is swung backward by the gear unit 31 moving clockwise. To do. Here, the “front direction” in the swinging direction of the turning gear 30 is the front side (front side of the seat) of the turning base 10, and the “rear direction” is the rear side (back side of the seat) of the turning base 10. Side).

(Swivel pin)
The pivot pin 50 is provided on the support base 210 so as to protrude toward the pivot base 10. In this example, as shown in FIG. 4, the turning pin 50 protrudes toward the turning base 10 through the through hole 12 formed in the turning base 10, and the tip thereof is provided in the middle of the arm portion 32 of the turning gear 30. The engaging portion 35 (the long hole 35h) is inserted and connected. As shown in FIG. 5, the swivel pin 50 is arranged at a position (point b in FIG. 5) that is eccentric from the rotation center a of the seat.

(Lock mechanism)
As shown in FIGS. 3 and 5, the rotation mechanism T shown in this example includes a lock mechanism 60 that holds the seat in the forward direction of the vehicle. In this example, as shown in FIG. 5, a claw portion 36 that protrudes from the inner peripheral surface is provided on the other end side of the gear portion 31. The lock mechanism 60 includes a lock pin 61 that is caught by the claw portion 36 when the turning base 10 is not rotating (that is, the turning gear 30 is in the initial position). When the drive gear 41 rotates and the gear portion 31 moves counterclockwise from the state in which the turning gear 30 is in the initial position, the lock pin 61 moves along the claw portion 36 and the claw portion 36. In this example, the lock pin 61 is provided on one end side of the lock plate 62, the other end side of the lock plate 62 is rotatably supported by the shaft portion 63, and the lock plate 62 is attached to the gear portion 31 side by a spring 64. It is made up of. The rotation mechanism T includes the lock mechanism 60 so that when the swivel gear 30 is in the initial position, the claw portion 36 provided in the gear portion 31 is engaged with the lock pin 61, thereby causing an external impact or the like. Thus, the rotation of the turning gear 30 can be suppressed. Therefore, it is possible to restrict the turning base 10 from turning without depending on the rotation of the turning gear 30 by the drive gear 41.

  Further, in this example, as shown in the upper diagram of FIG. 9, when the turning gear 30 is in the initial position on one end side in the longitudinal direction of the long hole 35 h constituting the engaging portion 35, the tip of the turning pin 50 A recess 35c into which a part of is fitted is formed. When the swivel gear 30 (arm portion 32) is swung forward with respect to the swivel base 10 from the initial position, as shown in the lower diagram of FIG. 50 comes out of the recess 35c. When the turning gear 30 is in the initial position, a part of the tip of the turning pin 50 is locked in the recess 35c formed in the long hole 35h, so that the turning gear 30 is rotated by an external impact or the like. Can be suppressed.

(Swivel base rotation mechanism by rotation mechanism)
A rotation mechanism of the turning base 10 by the rotation mechanism T having the above-described configuration will be described. FIG. 5 shows a state in which the turning base 10 is not rotating (that is, a state in which the turning gear 30 is in the initial position), and FIGS. 6 to 8 respectively show the turning base 10 45 in the left direction (counterclockwise). It shows the state rotated by 60 ° (FIG. 6), 60 ° (FIG. 7), and 90 ° (FIG. 8). That is, FIG. 5 shows a state where the seat is in the seating position, and FIG. 8 shows a state where the seat is in the getting-on / off position. In the state shown in FIG. 5, one end side of the gear portion 31 is engaged with the drive gear 41. From the state shown in FIG. 5, the motor 40 is driven, the drive gear 41 rotates, and the gear part 31 moves counterclockwise, so that the turning gear 30 (arm part 32) moves forward with respect to the turning base 10. Rocks. At this time, when the engaging portion 35 (the long hole 35h) provided in the arm portion 32 pushes the turning pin 50, the turning base 10 rotates counterclockwise around the rotation center of the turning bearing 20 (FIG. 6, see FIG. And as shown in FIG. 8, when the gear part 31 moves to the position which the other end side of the gear part 31 meshes with the drive gear 41, the turning base 10 will be in the state rotated 90 degrees to the left. Conversely, from the state shown in FIG. 8, when the motor 40 is driven and the drive gear 41 rotates in the reverse direction, the gear portion 31 moves clockwise, and the turning gear 30 (arm portion 32) moves relative to the turning base 10. Swings backward. Accordingly, the engaging portion 35 (the long hole 35h) pushes the turning pin 50, and the turning base 10 rotates clockwise around the rotation center of the turning bearing 20, thereby returning to the state shown in FIG. Can do.

{Function and effect}
The rotation mechanism T in the vehicle seat device 1 of the first embodiment described above has the following operational effects.

  Since the turning gear 30 and the motor 40 are attached to the turning base 10 on the seat side, the turning gear 30 (gear portion 31) is prevented from being exposed to the outside when the turning base 10 is turned. It is possible to easily ensure safety and dust resistance.

  Further, the shaft 33 serving as the rotation center of the swivel gear 30 is provided at a position c deviated from the rotation center a of the seat, and the swivel pin 50 is provided at a position b eccentric from the rotation center a of the seat (see FIG. 5). ), The swivel pin 50 is connected to an engagement portion 35 (long hole 35h) provided in the middle of the arm portion 32 of the swivel gear 30. Thereby, the link structure of the shaft part 33 of the turning gear 30 and the turning pin 50 is configured, and the rotation angle θ of the gear part 31 of the turning gear 30 can be made smaller than 90 ° by the lever ratio of this link structure. Therefore, the size of the turning gear 30 can be reduced and the installation space of the turning gear can be saved, so that the turning gear 30 can be easily housed in the turning base 10 in a compact manner.

  The present invention is not limited to these exemplifications, is shown by the scope of the claims, and is intended to include all modifications within the meaning and scope equivalent to the scope of the claims. In the first embodiment, an example in which the present invention is applied to a passenger seat is shown, but the present invention can also be applied to a seat other than the passenger seat.

  The vehicle seat device of the present invention can be suitably used for a seat for a welfare vehicle including a rotation mechanism.

DESCRIPTION OF SYMBOLS 1 Vehicle seat apparatus F Floor T Rotating mechanism R Elevating slide mechanism 10 Turning base 12 Through hole 15 Frame 20 Turning bearing 21 Inner ring 22 Outer ring 30 Turning gear 31 Gear part 32 Arm part 33 Shaft part 35 Engaging part 35e Projection piece 35h Long Hole 35c Recess 36 Claw 40 Motor 41 Drive gear 50 Rotation pin 60 Lock mechanism 61 Lock pin 62 Lock plate 63 Shaft 64 Spring 201 Fixing member 210 Support base 310 Lift slide base 311 Lift rail 312 Roller 315 Frame 316 Drive shaft 317 Drive shaft 320 Chain 321 First connection point 322 Second connection point

Claims (1)

A vehicle seat device including a rotation mechanism that rotates a seat installed on a floor of a vehicle body between a seating position facing the front of the vehicle and a boarding / alighting position facing a door opening side of the vehicle,
The rotation mechanism is
A support base disposed on the floor;
A swivel base disposed on the support base and on which the seat is installed;
A swivel bearing that rotatably supports the swivel base on the support base and has a center of rotation of the seat;
An arcuate gear portion provided on the swivel base, an arm portion extending from the gear portion toward the center of the arc, and the arm portion pivotable at the arc center position of the gear portion. A swivel gear that has a shaft portion that is pivotally supported, and the shaft portion is disposed at a position deviated from the rotation center of the seat;
A motor provided on the swivel base, having a drive gear meshing with a gear portion of the swivel gear, and rotating the drive gear;
A pivot pin provided on the support base so as to protrude toward the pivot base, and disposed at a position eccentric from the rotation center of the seat,
In the middle of the arm portion of the swivel gear, there is an engaging portion to which the swivel pin is connected,
When the motor is driven and the drive gear rotates, and the swivel gear swings between one end side and the other end side of the gear portion with the shaft portion as a rotation center, the arm portion is engaged. The vehicle seat device in which the turning base rotates about the rotation center of the slewing bearing when the part pushes the slewing pin.

Images