JP6635549B2 - Vehicle seat device - Google Patents

Description

  The present invention rotates a seat on which an occupant sits between a seating position facing the front of the vehicle and a boarding / alighting position facing the door opening side of the vehicle, and seats outside the vehicle cabin from the door opening of the vehicle. The present invention relates to a vehicle seat device that can be slid to a position where it is easy to perform.

  In a welfare vehicle or the like, in order to make it easy for the occupant to get on and off the vehicle, for example, the seat on the passenger seat side is moved between a seating position facing the front of the vehicle and a getting on / off position facing the door opening side of the vehicle. 2. Description of the Related Art A seat device has been developed that includes a rotating mechanism for rotating a seat and an elevating slide mechanism for sliding the door from the door opening to the outside of the passenger compartment while being rotated to the getting on / off position (for example, see Patent Document 1). This type of vehicle seat device generally has a structure in which a rotating mechanism is arranged on a floor of a vehicle body, a lifting / lowering slide mechanism is mounted on the rotating mechanism, and a seat is attached to the lifting / lowering slide mechanism.

  For example, in the seat device described in Patent Document 1, a rotating plate is rotatably disposed on a floor of a vehicle body via a rotating member, and a slide mechanism is mounted thereon. The rotary drive mechanism in the seat device has an arc-shaped rack gear attached to the floor side, and a motor having a pinion gear attached to the rotating plate side and meshing with the rack gear. Thus, the rotating plate is driven to rotate between the seating position and the getting on / off position with the rotating member as the center of rotation. The arc-shaped rack gear included in the rotation drive mechanism is arranged such that the center of the arc coincides with the rotation center of the rotating plate, and in order 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) of the gear is 90 ° + α.

JP 2015-39990 A

  In a vehicle seat device including a rotation mechanism and an elevating slide mechanism, when a large forward load is applied to a seat due to a collision accident or the like in a state where the seat is in a seating position, the seat may slide forward. As a countermeasure, when the seat is at the seating position, it is desired to restrict the sliding movement of the seat by the elevating slide mechanism and lock the seat so as not to move forward.

  In the above-described conventional vehicle seat device, 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. It is necessary to provide a cover as a dustproof measure. Further, since the rack gear has a rotation angle of 90 ° + α, and the gear has a long circumference and a large size, it is necessary to take a large installation space.

  An object of the present invention is to provide a vehicle seat device having a simple configuration and capable of restricting a sliding movement by an elevating slide mechanism when a seat is at a seating position.

  (1) The vehicle seat device according to one aspect of the present invention rotates the seat on which the occupant sits between a seating position facing the front of the vehicle and a boarding / alighting position facing the door opening side of the vehicle. A rotating mechanism; and an elevating slide mechanism that slides out of the vehicle compartment from the door opening while being rotated to the getting on / off position. The vehicle seat device includes a slide lock mechanism that restricts sliding movement of the seat by the elevating slide mechanism in a state where the seat is at a seating position. The rotation mechanism includes a turning base rotatably disposed on a floor of a vehicle body, and a rotation driving mechanism provided on the turning base and configured to rotationally drive the turning base. The rotation drive mechanism has an arcuate gear portion, a rotation gear rotatably supported by the rotation base, and a drive gear that meshes with a gear portion of the rotation gear. A driving motor. The elevating slide mechanism includes a slide base that is slidably disposed on the turning base and on which the seat is installed. The slide lock mechanism is attached to the turning base, and is integrally provided with a hook that engages with the sliding base and the turning gear. When the seat is in a seating position, the slide contact mechanism comes into contact with the hook and slides. A stopper is provided for holding the engagement state of the hook with the base and releasing the hook to release the engagement state of the hook when the seat is at the getting on / off position.

  According to the above-described vehicle seat device, by providing the slide lock mechanism, the sliding movement by the elevating slide mechanism can be restricted when the seat is at the seating position. Since the stopper that constitutes the slide lock mechanism is provided integrally with the turning gear that constitutes the rotary drive mechanism, the number of parts is small and the slide lock mechanism can be realized with a simple configuration.

  In the rotating mechanism, since the turning gear and the motor constituting the rotation driving mechanism are provided on the turning base, it is possible to prevent the turning gear (gear portion) from being exposed to the outside when the turning base is turned, Safety and dustproofness can be easily secured.

1 is an upper left perspective view schematically showing an overall configuration of a vehicle seat device according to a first embodiment. FIG. 1 is a left side view schematically illustrating an overall configuration of a vehicle seat device according to a first embodiment. FIG. 2 is an upper left perspective view schematically illustrating a configuration of a rotation mechanism and a slide lock mechanism in the vehicle seat device according to the first embodiment. FIG. 2 is an upper right perspective view schematically illustrating a configuration of a rotation mechanism and a slide lock mechanism in the vehicle seat device according to the first embodiment. FIG. 2 is a top view schematically illustrating a configuration of a rotation mechanism in the vehicle seat device according to the first embodiment. FIG. 2 is a top view schematically illustrating a state in which the turning base of the rotation mechanism is rotated by 90 ° in the vehicle seat device according to the first embodiment. FIG. 6 is a main part top view showing the engagement portion of FIG. 5 in an enlarged manner. FIG. 2 is an upper left perspective view schematically showing a configuration of a lifting slide mechanism in the vehicle seat device according to the first embodiment. FIG. 2 is an upper right perspective view schematically illustrating a configuration of an elevating slide mechanism in the vehicle seat device according to the first embodiment.

  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 figures indicate the same names. In the following description, the terms “front”, “rear”, “left”, “right”, “up”, and “down” mean the direction in which the front of the vehicle is “front” and this is the reference. In the drawing, FR indicates forward in the vehicle longitudinal direction, RR indicates rearward, LH indicates leftward in the vehicle lateral direction (vehicle width direction), RH indicates rightward, UP indicates upward in the vehicle vertical direction, and LWR indicates downward.

[Embodiment 1]
全体 Overall configuration of vehicle seat device｝
The vehicle seat device according to the first embodiment will be described with reference to FIGS. 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 mounted thereon. The vehicle seat device 1 shown in FIGS. 1 and 2 includes a support base 210, a rotation mechanism T, and an elevating slide mechanism R. The support base 210 is arranged 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 of the vehicle. The elevating slide mechanism R is disposed on the rotation mechanism T, and slides the seat from the door opening to the outside of the vehicle compartment (that is, the vehicle left / right direction) to rotate up and down while rotating the seat to the getting on / off position. One of the features of the vehicle seat device 1 is that the vehicle seat device 1 includes a slide lock mechanism L (see FIGS. 8 and 9 and the like) that regulates the sliding movement of the seat by the elevating slide mechanism R in a state where the seat is in the seating position. . In this example, the vehicle seat device 1 is provided on 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. Hereinafter, the configuration of the vehicle seat device 1 will be described in detail.

<Support base>
The support base 210 is supported on a pair of left and right fixing members 201 extending along the front-rear direction and is arranged on the floor F, as shown in FIGS. 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 to be slidable in the front-rear direction with respect to the fixing member 201. Thereby, the seat can be slid in the vehicle longitudinal direction. In this case, it is also possible to attach a motor to the support base 210 and electrically slide the motor.

<Rotating mechanism>
As shown in FIGS. 1 and 2, the rotation mechanism T includes a turning base 10 rotatably disposed on a support base 210. The swivel base 10 is rotatably supported by a support base 210 via a swivel bearing 20 (see FIG. 2). The rotation mechanism T is capable of horizontally rotating the swivel base 10 about a rotation center of the swivel bearing 20 by about 90 ° between the seating position and the getting on / off position. A pair of side plates 15 are erected on the turning base 10 on the left and right. Here, the configuration of the rotation mechanism T will be briefly described, and details of the rotation mechanism T will be described later.

(Rotary drive mechanism)
As shown in FIGS. 3 and 4, the rotation mechanism T includes a rotation drive mechanism 10D that rotationally drives the rotation base 10, and the rotation drive mechanism 10D is provided on the rotation base 10. The rotation drive mechanism 10D includes a turning gear 30 and a motor 40.

(Slewing gear)
The turning gear 30 is mounted on the turning base 10 as shown in FIGS. 3 to 5, has an arcuate gear part 31, and is rotatably supported by the turning base 10. In this example, the turning gear 30 includes a gear portion 31, an arm portion 32 extending from the gear portion 31 toward the center of the arc thereof, and the arm portion 32 which is rotatable at the arc center position of the gear portion 31. And a shaft portion 33 that is pivotally supported.

(motor)
The motor 40 is mounted on the turning base 10 as shown in FIGS. 3 to 5, has a driving gear 41 that meshes with the gear portion 31 of the turning gear 30, and drives the driving gear 41. When the motor 40 is driven and the drive gear 41 rotates, the turning gear 30 (arm 32) swings between one end and the other end of the gear 31 around the shaft 33 as a center of rotation. In a state where the turning base 10 is not rotating, that is, in a state where the seat is in the seating position, one end side of the gear portion 31 is positioned so as to mesh with the driving 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 driving 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, the drive gear 41 is rotated clockwise by the motor 40 and the gear section 31 is moved counterclockwise, The swivel gear 30 (arm 32) swings (rotates) forward with respect to the swivel base 10. Conversely, when the drive gear 41 is rotated counterclockwise from the state in which the swing gear 30 swings forward, the gear portion 31 moves clockwise, so that the swing gear 30 swings backward. I do. The “forward direction” in the swing direction of the turning gear 30 referred to here is the front side of the turning base 10 (the front side of the seat), and the “rear direction” refers to the rear side of the turning base 10 (the back side of the seat). Side).

<Elevating slide mechanism>
As shown in FIGS. 1 and 2, the lifting slide mechanism R includes a slide base 310 slidably disposed on the swivel base 10. In this example, as shown in FIGS. 8 and 9, lift rails 311 that are inclined downward and forward are mounted inside left and right side plates 15 provided on the swivel base 10, respectively. A roller 312 fitted to the elevating rail 311 is pivotally supported on the slide base 310, and the slide base 310 is slidably mounted along the elevating rail 311. A rectangular frame 315 is integrally provided on the slide base 310, and a sheet is fixed to the frame 315, and the sheet is mounted on the slide base 310. As shown in FIG. 8, the elevating slide mechanism R includes a drive shaft 316 and a driven shaft 317 arranged at intervals in the sliding direction, and a chain wound between the drive shaft 316 and the driven shaft 317. 320. 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 to the drive shaft 316. One end of the chain 320 is fixed to the first connection point 321 of the slide base 310, and the other end of the chain 320 is fixed to the second connection point 322. The drive shaft 316 rotates to drive the chain 320. Thereby, the slide base 310 is driven forward and backward. With such a configuration, the elevating slide mechanism R lowers the seat while rotating the seat to the getting on / off position by the rotation mechanism T while advancing the door from the door opening to the outside of the cabin, and retreats from the lowered state into the cabin. It can be raised while moving. A known technique can be adopted as the elevating slide mechanism R.

<Slide lock mechanism>
As shown in FIGS. 3 and 4, the slide lock mechanism L includes a pair of hooks 70a and 70b that engage with the slide base 310 (see FIGS. 8 and 9), and engages each hook 70a and 70b with the slide base 310. And a pair of stoppers 80a and 80b which are held at a position where they meet.

(hook)
Each of the hooks 70a and 70b has a plate shape, as shown in FIGS. 3 and 4, and is mounted inside left and right side plates 15 provided on the turning base 10. Each of the hooks 70a and 70b has a rear end pivotally supported by a shaft 71 protruding from the inside of each side plate 15, and is swingable about the shaft 71. At the front end side of each of the hooks 70a and 70b, an engaging portion 73 projecting upward and engaging with the slide base 310, and a vertical piece 75 projecting downward (toward the turning base 10) are formed. On the rear end side of each of the hooks 70a and 70b, there is formed a rear end projection 77 which projects upward and is pressed against a stopper pin 319 (see an enlarged view in FIG. 9) which will be described later. In this example, the length of the vertical piece 75 of the hook 70a is longer than that of the hook 70b. The turning base 10 is formed with a through hole 17 through which the hanging piece 75 can be inserted at a position facing the lower end of the hanging piece 75 of the hook 70a (see an enlarged view in FIG. 8).

  In this example, as shown in FIGS. 5 and 8 and 9, a side plate 318 is fixed to a side surface of the slide base 310, and the side plate 318 is shown in an enlarged view in FIG. 9. Thus, a stopper pin 319 protruding inward is provided. Although not shown, a stopper pin is also provided on the right side plate 318 (see the enlarged view in FIG. 8), similarly to the left side plate 318 shown in the enlarged view in FIG. Accordingly, when the slide base 310 is in the retracted position, the stopper pins 319 are pressed against the rear end projections 77 of the hooks 70a, 70b, respectively, and the front ends of the hooks 70a, 70b are lifted, thereby increasing the respective positions. The engaging portions 73 of the hooks 70a and 70b are held at positions where they engage with the slide base 310 (see an enlarged view in FIG. 9). The rear ends of the hooks 70a and 70b are pivotally supported by the shaft 71, and the front ends drop when the stopper pins 319 are not pressed against the rear projections 77, respectively.

(Stopper)
Each stopper 80a, 80b is provided integrally with the turning gear 30. One stopper 80a contacts the lower end of the hanging portion 75 of the right hook 70a, and the other stopper 80b contacts the lower end of the hanging portion 75 of the left hook 70b.

  As shown in FIGS. 3 and 5, the stopper 80a overlaps with the lower surface of the gear portion 31 of the revolving gear 30, extends from the gear portion 31 in the direction in which the arm portion 32 extends (the right side plate 15 side). The shape in a plan view is formed in an L shape. The L-shaped end of the stopper 80a is formed so as to face the lower end of the hanging piece 75 of the hook 70a when the seat is in the seating position (the turning gear 30 is in the initial position). (See an enlarged view in FIG. 8). The stopper 80a is located at the lower end of the hanging portion 75 of the hook 70a and comes into contact with the hanging portion 75, thereby preventing the front end of the hook 70a from dropping and engaging the engaging portion 73 of the hook 70a with the slide base 310. (See the enlarged view in FIG. 8). That is, when the seat is at the seating position, the stopper 80a holds the hook 70a engaged with the slide base 310.

  The stopper 80b is provided on the shaft portion 33 side of the revolving gear 30, as shown in FIG. 4, and is bent upward at a position facing the lower end of the hanging piece 75 of the hook 70b when the seat is in the seating position. It is formed. Since the stopper 80b is located at the lower end of the hanging portion 75 of the hook 70b and comes into contact with the hanging portion 75, the front end of the hook 70b is prevented from dropping, and the engaging portion 73 of the hook 70b engages with the slide base 310. (Refer to an enlarged view in FIG. 9). That is, when the seat is in the seating position, the stopper 80b holds the hook 70b engaged with the slide base 310.

(Operation of slide lock mechanism)
The operation of restricting the slide movement of the slide base 310 (seat) by the slide lock mechanism L will be described. When the turning base 10 is not rotating as shown in FIGS. 3 to 5 (that is, when the seat is in the seating position), the stoppers 80a and 80b contact the lower ends of the hanging pieces 75 of the hooks 70a and 70b, respectively. Then, as shown in FIGS. 8 and 9, the engagement between the slide base 310 and the hooks 70a and 70b is maintained. From this state, the turning gear 30 swings (rotates) forward with respect to the turning base 10, and the turning base 10 is rotated 90 ° counterclockwise as shown in FIG. Position), the positions of the stoppers 80a and 80b with respect to the turning base 10 move. When the stoppers 80a and 80b are separated from the lower ends of the vertical pieces 75 of the hooks 70a and 70b, respectively, the prevention of the hooks 70a and 70b from being dropped by the stoppers 80a and 80b is released. When the slide base 310 is advanced from this state, the stopper pin 319 does not press the rear end projection 77, and the front end of each of the hooks 70a and 70b falls, so that the engagement portion 73 of the hook 70b and the slide base 310 Deviates from the engaged position. Thereby, the engagement state between the slide base 310 and the hooks 70a, 70b is released. That is, when the seat is at the getting on / off position, the stoppers 80a, 80b release the engagement states of the hooks 70a, 70b with the slide base 310. On the other hand, when the slide base 310 is retracted from the advanced state, the stopper pin 319 pushes the rear end projection 77, the front end side of each hook 70a, 70b is lifted, and the engagement part 73 of each hook 70a, 70b is It can return to the position where it engages with 310. Therefore, when the seat is in the seating position, the slide movement of the slide base 310 can be restricted by the hooks 70a and 70b, and when the seat is in the getting on and off position, the slide restriction by the hooks 70a and 70b can be released. Therefore, after the slide restriction by the hooks 70a and 70b is released, the slide base 310 (seat) can be slid by the elevating slide mechanism R, and the slide base 310 can be moved forward while the seat is in the getting on / off position. It can be retracted from the forward state.

｛Effects｝
The vehicle seat device 1 according to the first embodiment has the following operational effects.

  By providing the slide lock mechanism L, the slide movement by the elevating slide mechanism R can be restricted when the seat is in the seating position, and the seat slides forward even when a large forward load is applied to the seat due to a collision accident or the like. Moving can be prevented. On the other hand, when the seat is at the getting on / off position, the slide restriction by the slide lock mechanism L is released, so that the sheet can be slid by the elevating slide mechanism R. Further, since the stoppers 80a and 80b constituting the slide lock mechanism L are provided integrally with the turning gear 30, the number of parts is small, and the slide lock mechanism L can be realized with a simple configuration.

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

(Slewing bearing)
The rotation bearing 20 provided in the rotation mechanism T rotatably supports the rotation base 10 on the support base 210 as shown in FIGS. 2 and 5, and has a rotation center of the seat. The swivel bearing 20 is attached so as to be interposed between the support base 210 and the swivel base 10 (see FIG. 2). The slewing bearing 20 is an annular member having an inner ring 21 and an outer ring 22 fitted to the outside thereof (see FIG. 5). In an annular space formed between the inner ring 21 and the outer ring 22, a plurality of balls are rollably incorporated, and the outer ring 22 is provided rotatably with respect to the inner ring 21. The lower end surface of the inner race 21 is fixed to the support base 210 with bolts, and the upper end surface of the outer race 22 is fixed to the turning base 10 with bolts. The center axis of the inner ring 21 fixed to the support base 210 is the center of rotation of the turning bearing 20, and the turning of the outer ring 22 about the inner ring 21 causes the turning base 10 to rotate with respect to the support base 210. That is, the center of rotation of the slewing bearing 20 coincides with the center of rotation of the seat (point a in FIG. 5). As shown in FIG. 5, the turning base 10 is formed with a through hole 12 at a position corresponding to the inner space of the turning bearing 20 (the inner ring 21). Project toward the turning base 10.

(Slewing gear)
As described above, the turning gear 30 has an arcuate gear portion 31, an arm portion 32 extending from the gear portion 31 toward the center of the arc, and the arm portion 32 is rotatable at the arc center position of the gear portion 31. And a shaft portion 33 pivotally supported by the turning base 10 (see FIGS. 3 to 5). The shaft portion 33 is provided at a position (point c in FIG. 5) 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, which is the rotation center of the turning gear 30, is shifted from the rotation center a of the seat.

  In the middle of the arm 32 of the turning gear 30, there is provided an engaging portion 35 to which a turning pin 50 described later is connected. The engaging portion 35 is configured by providing a protruding piece 35e protruding from the side surface of the arm section 32 and forming an elongated hole 35h in the protruding piece 35e. The pivot pin 50 is inserted through and connected to the engagement portion 35 (elongated hole 35h) provided in the middle of the arm portion 32, so that a link structure between the shaft portion 33 of the pivot gear 30 and the pivot pin 50 is formed. ing.

(Rotation angle of gear and lever ratio)
The rotation angle (center angle) θ of the gear portion 31 of the revolving 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 a distance X from the center of rotation a of the seat to the center b of the turning pin 50 and a distance Y from the center b of the turning pin 50 to the center c of the shaft 33 of the turning gear 30. / Y). Here, the rotation pin 50 is evenly rotated with the rotation center a of the sheet and the center c of the shaft 33 interposed therebetween, and the rotation angle of the rotation gear 30 when rotating the sheet at the rotation angle α (unit: degree) is β. When (unit: degrees), 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 becomes smaller than α when (X / Y) is smaller than 1. That is, by increasing the distance Y (distance between bc) with respect to the distance X (distance between a and ab), when rotating the seat (the turning base 10) by 90 °, the rotation angle θ of the gear unit 31 is set to 90 °. Can be smaller. The rotation angle θ of the gear portion 31 may be appropriately determined according to the layout of the turning gear 30 and the turning pins 50 and the like. From the viewpoint of saving the installation space of the turning gear 30, it is preferable to design the rotation angle θ of the gear portion 31 to be, for example, 45 ° or less.

(Swivel pin)
The rotation drive mechanism 10D includes a pivot pin 50. The turning pin 50 is provided on the support base 210 so as to protrude toward the turning base 10. In this example, as shown in FIGS. 3 and 4, the swivel pin 50 protrudes toward the swivel base 10 through the through hole 12 formed in the swivel base 10, and its tip is in the middle of the arm 32 of the swivel gear 30. And is connected by being inserted into an engagement portion 35 (a long hole 35h) provided in the first portion. The pivot pin 50 is disposed at a position (point b in FIG. 5) eccentric from the rotation center a of the seat as shown in FIG.

(Swivel lock mechanism)
The rotation mechanism T shown in this example includes a turning lock mechanism 60 that holds the seat in a forward direction of the vehicle, as shown in FIGS. In this example, a claw portion 36 protruding from the inner peripheral surface is provided on the other end side of the gear portion 31 (see FIG. 6). The turning lock mechanism 60 has a lock pin 61 that catches on the claw portion 36 when the turning base 10 is not rotating (that is, the turning gear 30 is in the initial position). The turning lock mechanism 60 is configured such that when the turning gear 30 is in the initial position, when the gear portion 31 moves counterclockwise, the lock pin 61 moves along the claw portion 36 and comes off the claw portion 36. Have been. In this example, a lock pin 61 is provided at one end of a lock plate 62, the other end of the lock plate 62 is rotatably supported by a shaft 63, and the lock plate 62 is attached to the gear 31 by a spring 64. It is composed of force. The rotation mechanism T is provided with the rotation lock mechanism 60, so that when the rotation gear 30 is at the initial position, the claw 36 provided on the gear part 31 is locked by the lock pin 61, so that an external impact is provided. The rotation of the turning gear 30 can be suppressed by, for example, the above. Therefore, the rotation of the turning base 10 can be restricted without depending on the rotation of the turning gear 30 by the driving gear 41.

  Further, in this example, as shown in the upper diagram of FIG. 7, when the turning gear 30 is in the initial position at one end in the longitudinal direction of the long hole 35h forming the engaging portion 35, the tip of the turning pin 50 Is formed into a recess 35c into which a part of the recess 35c fits. When the swing gear 30 (arm 32) is swung forward with respect to the swing base 10 from the initial position, the slot 35h moves as shown in the lower diagram of FIG. 50 comes off the recess 35c. When the turning gear 30 is at the initial position, a part of the tip of the turning pin 50 is locked in the recess 35c formed in the elongated hole 35h, so that the turning gear 30 rotates due to an external impact or the like. Can be suppressed.

(Operation of rotation mechanism)
The rotation operation of the turning base 10 by the rotation mechanism T 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 FIG. 6 shows a state in which the turning base 10 is rotated 90 ° to the left (counterclockwise). Is shown. That is, FIG. 5 shows a state where the seat is at the seating position, and FIG. 6 shows a state where the seat is at the getting on / off position. In the state shown in FIG. 5, one end of the gear portion 31 is engaged with the drive gear 41. From the state shown in FIG. 5, the motor 40 is driven to rotate the drive gear 41, and the gear 31 moves counterclockwise, so that the turning gear 30 (arm 32) moves forward with respect to the turning base 10. Rocks. At this time, when the engaging portion 35 (elongated hole 35 h) provided on the arm portion 32 pushes the turning pin 50, the turning base 10 rotates counterclockwise around the rotation center of the turning bearing 20. Then, as shown in FIG. 8, when the gear portion 31 moves to a position where the other end of the gear portion 31 meshes with the drive gear 41, the turning base 10 is in a state of being rotated 90 ° to the left. Conversely, when the motor 40 is driven to rotate the drive gear 41 in the reverse direction from the state shown in FIG. 8, the gear portion 31 moves clockwise, and the turning gear 30 (the arm portion 32) moves with respect to the turning base 10. Swings backwards. As a result, the engaging portion 35 (the elongated 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 be.

  The vehicle seat device 1 of the first embodiment including the rotation mechanism T having the above-described configuration has the following operation and effects.

  Since the turning gear 30 and the motor 40 constituting the rotation driving mechanism 10D are attached to the turning base 10 on the seat side, the turning gear 30 (gear part 31) is externally turned when the turning base 10 is turned. Exposure can be prevented, and safety and dust resistance can be easily secured.

  Further, the shaft portion 33 serving as the rotation center of the turning gear 30 is provided at a position c deviated from the rotation center a of the seat, and the turning pin 50 is provided at a position b eccentric from the rotation center a of the seat (see FIG. 5). ), The turning pin 50 is connected to an engaging portion 35 (a long hole 35h) provided in the middle of the arm portion 32 of the turning gear 30. Thus, a link structure between the shaft portion 33 of the revolving gear 30 and the revolving pin 50 is formed. Due to the lever ratio of the link structure, the rotation angle (center angle) θ of the gear portion 31 of the revolving gear 30 is smaller than 90 °. it can. Since the rotation angle of the gear portion 31 can be smaller than 90 °, the circumference of the gear portion 31 can be shortened and the size of the turning gear 30 can be reduced, so that the installation space for the turning gear 30 can be saved. Therefore, the turning gear 30 can be compactly stored in the turning base 10 without protruding from the turning base 10.

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

  INDUSTRIAL APPLICABILITY The vehicle seat device of the present invention can be suitably used for a seat of a welfare vehicle.

DESCRIPTION OF SYMBOLS 1 Vehicle seat apparatus F Floor T Rotation mechanism R Elevating slide mechanism L Slide lock mechanism 10 Revolving base 12 Through hole 15 Side plate 10D Rotation drive mechanism 17 Through hole 20 Revolving bearing 21 Inner ring 22 Outer ring 30 Revolving gear 31 Gear part 32 Arm part 33 Shaft 35 Engagement 35e Protruding piece 35h Slot 35c Recess 36 Claw 40 Motor 41 Drive gear 50 Swivel pin 60 Swivel lock mechanism 61 Lock pin 62 Lock plate 63 Shaft 64 Spring 70a, 70b Hook 71 Shaft 73 Engagement part 75 Vertical piece part 77 Rear end projection part 80a, 80b Stopper 201 Fixing member 210 Support base 310 Slide base 311 Elevating rail 312 Roller 315 Frame 316 Drive shaft 317 Follower shaft 318 Side plate 319 Stopper pin 320 En 321 first connection point 322 second connecting point

Claims (1)

A rotation mechanism for rotating a seat on which an occupant is seated between a seating position facing the front of the vehicle and a boarding / alighting position facing the door opening side of the vehicle, and the door opening in a state where the seat opening / closing position is rotated. And a lifting and lowering slide mechanism that slides out of the vehicle compartment from the part,
A slide lock mechanism that regulates sliding movement of the seat by the elevating slide mechanism in a state where the seat is at the seating position,
The rotation mechanism,
A turning base rotatably arranged on the floor of the vehicle body,
A rotation drive mechanism that is provided on the turning base and that rotationally drives the turning base;
The rotation drive mechanism,
A turning gear having an arcuate gear portion and rotatably supported by the turning base;
A drive gear that meshes with a gear portion of the turning gear, and a motor that drives the drive gear;
The elevating slide mechanism includes:
A sliding base, which is slidably disposed on the turning base and on which the seat is installed;
The slide lock mechanism,
A hook attached to the swing base and engaging the slide base;
When the seat is in the seating position, the hook is in contact with the hook to hold the hook in an engaged state with the slide base. And a stopper that is separated from the hook and releases the engagement state of the hook.

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