JPH10315825A - Sliding and elevating device for seat of vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent heightening of the vertical positioning of a vehicle seat over the floor level. SOLUTION: A sliding and elevating device is equipped with a four-joint link mechanism composed of a base plate 51 which can support a seat S1 in the specified position and is installed on a frame 14 movably in the longitudinal direction of the seat and is lifted in compliance with movement to ahead of the seat, an upper link arm 52 which stretches straight approx. in the horizontal direction and is installed in the upper part of the base plate 51 in such a way as rotatable about the base part, a lower link arm 53 which stretches straight approx. in the horizontal direction and is installed in the lower part of the base plate 51 in such a way as rotatable about the base part, and an elevating plate 54 with which the forefronts of the two link arms 52 and 53 are coupled rotatably and which can support the seat S1 in the slide position. An elevating mechanism C1 includes a guide 55 which is installed in that part of the frame 14 situated beside the front of the seat and is engaged by one 53 of the link arms to support it 53 movably.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat sliding / elevating apparatus mounted on a vehicle, and more particularly to a seat for a vehicle in which the seat can be slid toward a door opening and can be moved up and down through the door opening. It relates to a slide / lift device.

[0002]

2. Description of the Related Art Seat sliding in a vehicle of this type.
An elevating device is disclosed in, for example, JP-A-9-39622, and slides a seat supported on a gantry supported on a floor of a passenger compartment between a fixed position and a sliding position in a front-rear direction of the seat. And a lifting mechanism capable of lowering the seat below the sliding position and raising the seat to the same sliding position, wherein the lifting mechanism is substantially in the front-back direction of the seat with respect to the gantry. A base plate movably mounted in a horizontal state and capable of supporting the seat at its fixed position; and a base mounted on an upper portion of the base plate so as to be rotatable at a base and extending along the moving direction of the base plate and housed therein. In the state, a substantially horizontal linear upper link arm and a lower portion of the base plate are rotatably assembled at a base portion and extend along a moving direction of the base plate. A four-bar link mechanism comprising a lower link arm having an upwardly curved portion in an intervening portion, and an elevating plate capable of supporting the seat at its sliding position with the tip ends of both link arms rotatably connected. In addition, an elevating mechanism including a guide pin attached to a front portion of the seat of the gantry and slidably engaged with a lower surface of the lower link arm and movably supporting the lower link arm is employed.

[0003]

In the apparatus disclosed in Japanese Patent Laid-Open No. 9-39622, since the middle portion of the lower link arm is largely curved upward, the vertical dimension between the two link arms is reduced. And the vertical dimensions of the lifting plate and the base plate increase accordingly. For this reason, the vertical position of the seat supported by the elevating plate or the base plate from the floor increases, and when the device is applied to, for example, the passenger seat of a passenger car, there is a problem that the passenger seat is higher than the driver seat.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problem, and a seat supported on a gantry supported on a floor of a passenger compartment is provided between a fixed position and a sliding position. A sliding mechanism slidable in the front-rear direction of the seat, and a lifting mechanism capable of lowering the seat below the sliding position and raising the seat to the sliding position, and sliding the seat toward the door opening. A seat sliding / elevating device for a vehicle capable of moving up and down through the same door opening, wherein, as the elevating mechanism, the seat can be supported at its fixed position and can be moved in the front-rear direction of the seat with respect to the gantry. A base plate which is mounted on the base plate and which is lifted upward in accordance with the movement of the seat forward; and a base which is rotatably mounted at a base on an upper portion of the base plate. An upper link arm extending along the moving direction of the plate, a lower link arm rotatably assembled at the base of the lower portion of the base plate and extending along the moving direction of the base plate, and a distal end portion of each of the link arms; A four-bar link mechanism, which is rotatably connected to the seat and supports the seat at its sliding position, and is attached to a front part of the seat of the gantry and engages with one of the link arms. It is characterized in that an elevating mechanism including a guide for movably supporting the link arm is employed.

[0005] In this case, it is desirable to adopt a linear link arm as the both link arms, and to adopt a configuration in which the gantry is pivotally supported on the floor.

[0006]

In the seat sliding / elevating apparatus for a vehicle according to the present invention, when the base plate is moved in the longitudinal direction of the seat while the seat is supported by the elevating plate at the sliding position, the base plate is moved. The tip of the link arm supported by the guide descends or rises as the arm moves upward or downward in accordance with its forward or backward movement. For this reason, the elevating plate to which the ends of both link arms are rotatably connected is lowered or raised, and the seat supported by the elevating plate is lowered or raised integrally with the elevating plate.

In the present invention, the base plate is moved upward or downward in accordance with the advance or retreat of the base plate, and the elevating plate is lowered or raised accordingly. By adopting a link arm that is not greatly curved, the two link arms can be arranged close to each other in a state where the base plate is at the retreat end, and the vertical dimension between the two link arms can be reduced.
Therefore, the vertical dimension of the lifting plate and the base plate can be reduced, and the vertical position from the floor of the seat supported by the lifting plate or the base plate can be prevented from becoming high. When applied to a seat, the passenger seat can be made substantially the same height as the driver's seat.

In the present invention, when a linear link arm is used as both link arms, a link arm whose middle portion is greatly curved upward is used as the lower link arm (for example, see Japanese Unexamined Patent Application Publication No. 9-396
22), the four-bar link mechanism of the elevating mechanism can be manufactured easily with a simple configuration. In addition, when the gantry is configured to be rotatable with respect to the floor, the front of the seat supported by the device can be aligned with the door opening when getting on and off, and can be aligned with the front of the vehicle during traveling. As a result, it is possible to improve the ease of getting on and off and the seating feeling during traveling.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. 1 to 12 show an embodiment in which the device according to the present invention is applied to a passenger seat of a passenger car, that is, a seat S1 having a door opening 92 opened and closed by a door on the left side. A turning mechanism A1 that can turn at a predetermined angle θ with respect to the floor 93 of the passenger compartment;
The seat S1 is moved to a fixed position (the position shown in FIG. 2) and a sliding position (FIG. 1).
1), a slide mechanism B1 slidable in the front-rear direction (left-right direction of the vehicle) of the seat S1 and an elevating mechanism C1 capable of lowering the seat S1 below the slide position and raising the seat S1 to the same slide position. Have.

As shown in FIGS. 2, 3 and 4, the turning mechanism A1 has a fixed plate 11 fixed to the floor 93 of the passenger compartment.
And a column 13 that is rotatably provided substantially at the center of the fixed plate 11 via a bearing 12, a rotary base 14 integrally mounted on the upper part of the column 13, and mounted on the rotary base 14. A pair of rollers 1 rolled on the floor 93
5, 16 and the rotating base 14 at the original position (the position where the seat S1 is held at the non-turning fixed position shown by the solid line in FIG. 1) and the turning position (the turning of the seat S1 shown by the two-dot chain line in FIG. 1). A pivoting fixing device 20 for releasably fixing at the fixed position and the slide position) and a stopper 17 mounted on the floor 93 and positioning the rotary gantry 14 at the original position by engagement with the roller 16. And a stopper 18 attached to the floor 93 and positioning the rotary gantry 14 at the turning position by engagement with the roller 16. In addition,
FIG. 2 shows a state in which the seat S1 is held at the fixed turning position.

As shown in FIGS. 3 and 4, the turning fixing device 20 includes a handle shaft 21 rotatably mounted on the rotary gantry 14, and a handle shaft 21 integrally mounted on a distal end portion of the handle shaft 21. Arm 22, which is vertically movably attached to the rotating base 14, is connected to the tip of the arm 22 via a pin 23, and has a lower end provided with a locking hole 93 in the floor 93.
a, 93b (provided corresponding to the original position and the turning position) are constituted by lock pins 24 which are detachably fitted to each other, and rotate the handle shaft 21 counterclockwise in FIG. As a result, the lock pin 24 can be pulled out from the locking hole 93a or 93b, and the rotating gantry 14 can be turned.

The slide mechanism B1 is provided on the upper link arm 52 of the lift mechanism C1 in the housed state shown in FIG. 2 and on a lift plate 54 connected to the front end of the upper link arm 52, and is linear with the upper link arm 52. And a pair of right and left rails constituted by a rail portion 54a continuous with the rails 54a, and the rails 54a to 35g are respectively mounted on these rails via four rollers 32 to 35 so as to be movable in the longitudinal direction of the rails.
, A stopper 36 attached to the base plate 51 of the elevating mechanism C1 to restrict the rearward movement of the seat mounting table 31, and a sheet attaching platform provided on the lower link arm 53 of the elevating mechanism C1. A stopper 53a for regulating forward movement of the seat 31 and the seat mounting base 3;
1 is configured by a slide fixing device 40 that releasably fixes the fixed position 1 at a fixed position (the position in FIG. 2) and a slide position (the position in FIG. 11).

As shown in FIGS. 2, 5 and 6, the slide fixing device 40 has a handle shaft 41 rotatably mounted on the seat mount 31, and is integrally formed on the tip of the handle shaft 41. At the tip with a fork 42
a and an input arm 43a
And a pair of output arms 43b and 43c. The input shaft 43a is rotatably mounted on the seat mount 31, and the input arm 43a is engaged with the fork 42a. Lock pins 46, which are connected to the respective output arm portions 43b, 43c via pins 44, 45 and engage with the locking holes 51a, 51b provided in the base plate 51 or the locking holes 54b, 54c provided in the lifting plate 54,
The lock pins 46 and 47 are locked by rotating the handle shaft 41.
a, 51b or 54b, 54c to pull out the seat mounting base 31 in the longitudinal direction of the rail (front-back direction of the seat S1).
It can be made movable. The rotation of the rotating shaft 43 in the axial direction is restricted by a guide plate 48 that guides the input arm 43a.

As shown in FIG. 2, FIG. 7, FIG. 8, and FIG. 9, a pair of right and left guide rails 14a, each having a U-shaped cross section, mounted on a rotary base 14, as shown in FIGS. A base plate 51 assembled to be movable in the front-rear direction of the seat S1 via rollers 58, 59, and a rotatable assembly mounted on a base at an upper portion of the base plate 51 and extending along each guide rail portion 14a. 2, the upper link arm 52, which is a substantially horizontal straight line, is rotatably attached to the lower portion of the base plate 51 at the base and extends along each guide rail portion 14a. A pair of left and right four-bar linkages comprising a linear lower link arm 53, an elevating plate 54 to which the distal ends of the arms 52, 53 are rotatably connected; Be constituted by a guide roller 55 which slidably engages the lower surface of the lower link arm 53 is fixed, it is adapted to be driven vertically by the drive unit 60. Each guide rail 14a is arranged to be inclined upward toward the front of the seat so as to lift the base plate 51 upward in accordance with the movement of the base to the front of the seat.

As shown in FIGS. 8 and 10, the driving device 60 includes a screw shaft 61 supported at both front and rear ends of the rotating gantry 14 and disposed in parallel with the guide rail 14a.
A nut 63 screwed to the screw shaft 61 and fixed to the lower surface of the base plate 51 via a bracket 62; and a screw shaft 61 attached to the rotating base 14 to form a pair of gears 64,
Electric motor 66 with a speed reducer that rotates forward and reverse through 65
When the screw shaft 61 is rotated forward by the electric motor 66, the base plate 51 can be advanced with respect to the rotary base 14, and when the screw shaft 61 is rotated backward by the electric motor 66, the base plate 51 is rotated. Can be retracted with respect to the rotating base 14.

In this embodiment configured as described above, the following operations (1) to (3) are sequentially performed to move the seat S1 at the non-turning fixed position shown by the solid line in FIG. It can be moved to the outside descending position shown in FIG. 12,
In addition, it is possible to return to the original state by sequentially performing the reverse operation. (1) In the seat S1 at the non-turning fixed position shown by the solid line in FIG. 1, the lock pin 24 is pulled out from the locking hole 93a at the original position of the floor 93 by operating the handle shaft 21 of the turning fixing device 20. In this state, the seat S1 is turned together with the rotating base 14 and the like to the turning fixed position shown by the two-dot chain line in FIG.
And the lock pin 24 is fitted into the locking hole 93b at the turning position of the floor 93 to make the rotating base 14 unturnable. (2) In the seat S1 at the turning fixed position shown in the two-dot chain line in FIG. 1 and in FIG. 2, the lock pins 46 and 47 are engaged with the locking holes 51a, 51b,
In this state, the seat S1 is slid together with the seat mount 31 to the slide position shown in FIG. 11, and in this state, the handle shaft 41 is returned and the lock pins 46, 4
7 is engaged with the locking holes 54 b and 54 c of the lifting plate 54, and the seat mount 31 is connected to the lifting plate 54. (3) In the seat S1 at the slide position shown in FIG. 11, the electric motor 66 is driven to rotate the screw shaft 61 forward, and the base plate 51 is advanced to the position shown in FIG. At this time, the lower surface of the lower link arm 53 of the elevating mechanism C1 slides on the guide roller 55, and the seat S1 supported by the seat mount 31 descends in a horizontal state.

In this embodiment, the base plate 51 is moved upward or downward by the guide rail 14a in accordance with the advance or retreat of the base plate 51, and the elevating plate 54 is lowered or raised accordingly. Therefore, both link arms 52, 5
By adopting a link arm that is not greatly curved in the vertical direction as 3, the two link arms 52, 53 can be arranged close to each other with the base plate 51 at the retreating end, and between the two link arms 52, 53. The vertical dimension can be reduced. Therefore, the vertical dimension of the lifting plate 54 and the base plate 51 can also be reduced, and the vertical position of the seat S1 supported by the lifting plate 54 or the base plate 51 from the floor 93 can be prevented from increasing. When the device is applied to the passenger seat of a passenger car, the passenger seat can be made substantially the same height as the driver seat.

In this embodiment, since linear link arms are used as both link arms 52 and 53, a link arm whose middle portion is largely curved upward is used as the lower link arm (for example, Compared with the device of Japanese Patent Application Laid-Open No. 9-39622), the four-bar linkage of the lifting mechanism C1 can be made simple and easy to manufacture. Also, the rotating base 14 is mounted on the floor 93.
, The front of the seat S1 supported by the device can be aligned with the door opening 92 at the time of getting on and off, and at the same time can be adjusted with the front of the vehicle at the time of traveling. The seating feeling during traveling can be improved.

Further, in this embodiment, when the fixing of the seat mounting table 31 by the slide fixing device 40 is released, the upper link arm 52 and the upper link arm 54 are provided on the upper link arm 52 and the lifting plate 54 in the storage state in the lifting mechanism C1. The seat mount 31 can be moved together with the seat S1 along the rail constituted by the rail 52a and the rail portion 54a which is linearly continuous. At this time, the seat mount 31 and the seat S1 are moved between the fixed rotation position and the slide position. Only the entire stroke is moved, and the constituent members of the lifting mechanism C1 do not move at all. Therefore, when the seat S1 is manually slid between the fixed turning position and the sliding position, the operation can be performed lightly with a small amount of labor.

In this embodiment, a slide mechanism B1 and an elevating mechanism C1 are provided between the rotary frame 14 and the seat cushion S1a of the seat S1 at a fixed position (the position shown in FIG. 2) with respect to the rotary frame 14. Seated, seat S
Since the components of the slide mechanism B1 and the elevating mechanism C1 are not arranged at all behind the first seat back S1b, a space for reclining the seat back S1b with respect to the seat cushion S1a can be secured behind the seat back S1b. And the seat cushion S1
It is possible to recline the seat back S1b with respect to a. Further, the seat cushion S1a of the seat S1 at a fixed position with respect to the rotating frame 14 and the rotating frame 1
The slide mechanism B1, the lifting mechanism C1, and the driving device 60
Is accommodated, and the space in the front-rear direction of the seat can be reduced, so that a large space can be secured behind the seat S1, and this space is effective as a leg space or a luggage space for a rear seat. Can be used for Further, a lifting mechanism C1 driven by an electric motor 66 is adopted as a lifting mechanism, and the electric motor 66 is mounted on the seat S at a fixed position with respect to the rotating gantry 14.
Since it is arranged between the first seat cushion S1a and the rotating gantry 14, in addition to the above-described effects, it is possible to eliminate the fear of contamination due to oil leakage.

In the above embodiment, the present invention is applied to the device in which the seat S1 can turn with respect to the floor 93 by the turning mechanism A1, but the device in which the seat is supported so as not to turn with respect to the floor is used. In this case, for example, the slide mechanism and the elevating mechanism are assembled so as not to be swivelable with respect to the floor in the swiveling state shown in FIG. The seat is assembled in the state shown in FIG.

[Brief description of the drawings]

FIG. 1 is a plan view showing one embodiment of a seat moved by a device according to the present invention.

FIG. 2 is a view showing one embodiment of the device according to the present invention, as viewed from the rear of the vehicle.

FIG. 3 is a plan view showing a configuration of a turning mechanism shown in FIG. 2;

FIG. 4 is a sectional view taken along line 4-4 in FIG. 3;

FIG. 5 is a plan view showing a state where a seat is removed from FIG. 2;

FIG. 6 is a sectional view taken along line 6-6 in FIG. 5;

FIG. 7 is a diagram viewed from the right side of FIG. 2;

FIG. 8 is a partially cutaway plan view showing a state where a seat and a rotating base are removed from FIG. 2;

FIG. 9 is a sectional view taken along line 9-9 in FIG. 8;

FIG. 10 is a sectional view taken along the line 10-10 in FIG. 8;

FIG. 11 is an operation explanatory view showing a state where the seat is at a sliding position.

FIG. 12 is an operation explanatory view showing a state where the seat is at a lowered position.

[Explanation of symbols]

11 ... fixed plate, 13 ... prop, 14 ... rotating frame, 14a ...
Guide rail, 20: turning fixing device, 31: seat mounting table, 32-35: roller, 40: sliding fixing device, 51: base plate, 52: upper link arm,
53: lower link arm, 54: elevating plate, 54a
... Rail part, 55 ... Guide roller, 60 ... Drive device, 9
2: door opening, 93: floor, A1: turning mechanism, B1
... Slide mechanism, C1 ... Elevating mechanism, S1 ... Seat.

Continued on the front page (72) Inventor Fumiaki Kato 25, Ueikeike, Yoshiwara-cho, Toyota-shi, Aichi Pref.

Claims (3)

[Claims] 1. A sliding mechanism which can slide a seat supported on a gantry supported on a floor of a passenger compartment between a fixed position and a sliding position in the front-rear direction of the seat, and move the seat from its sliding position. A lifting / lowering mechanism capable of descending downward and rising to the same sliding position, wherein the seat is slidable toward a door opening and is capable of moving up and down through the door opening. A base plate capable of supporting the seat at its fixed position, being mounted on the gantry so as to be movable in the front-rear direction of the seat, and being lifted upward in accordance with the movement of the seat forward, An upper link arm rotatably assembled at an upper portion of the base plate at a base and extending along a moving direction of the base plate; A lower link arm that is rotatably attached to a lower portion of the base at a base portion and extends along the moving direction of the base plate, and the distal ends of both link arms are rotatably connected and the seat is moved to its sliding position. And a guide which is attached to a seat front side portion of the gantry, engages with one of the link arms and supports the link arm movably. A seat sliding / elevating device for a vehicle, which employs an elevating mechanism. 2. A seat sliding / elevating device for a vehicle according to claim 1, wherein a linear link arm is adopted as said both link arms. 3. The seat sliding / elevating device for a vehicle according to claim 1, wherein the gantry is supported so as to be pivotable with respect to the floor.