JP2005053247A - Elevating device of seat in vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an elevating device of a seat in a vehicle capable of sufficiently restraining the height of a seat position from a floor in the vertical direction. <P>SOLUTION: A lower link arm 14 of a four-node link mechanism extends rearward from a base of a base plate 7, and a rotatable engagement part 15 is installed at its extending end. A cam member 17 engaging the engagement part 15 with an engagement face 17A and movably supporting the lower link arm 14 is provided to a rotary stand 6 on the side of a floor 2. Thereby, a seat S1 can make both of link arms 13, 14 into an approximately horizontal condition at a raising position on a compartment side, and can also make a guide rail 10 arranged on the side of the floor 2 in an approximately horizontal condition. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a seat lifting / lowering device in a vehicle in which the seat can be lifted / lowered through a door opening.
[0002]
[Prior art]
In this type of vehicle, a lifting device for a seat is provided with a lifting mechanism between the floor and the seat of the vehicle, and the lifting mechanism is arranged on a guide rail having a substantially U-shaped cross section with respect to the door opening. The base plate is assembled to be movable in the front-rear direction, the upper link arm is attached to the upper part of the base plate so as to be rotatable at the base, and the base plate is attached to the lower part of the base plate so as to be rotatable at the base. A four-bar linkage mechanism consisting of a substantially straight lower link arm and a lift plate that supports the seat by pivotally connecting the leading ends of both link arms, and below the front end of the guide rail on the door opening side. The seat is configured by a guide roller disposed and slidably engaged with the lower surface of the lower link arm, and the base plate is advanced or retracted along the guide rail by the driving device. It rises to falling or the cabin side to the vehicle exterior through the door opening. Further, since both link arms are formed in a substantially straight line shape, both link arms extending in a substantially horizontal shape can be disposed close to each other when the seat is raised on the passenger compartment side, and the vertical dimension between the link arms can be reduced. The vertical position from the seat floor is suppressed from becoming higher. The seat lifting device in this vehicle is disclosed in, for example, the following patent document.
[0003]
[Patent Document 1]
JP-A-10-315825 (page 3-4, FIG. 2, FIG. 11, FIG. 12)
[0004]
[Problems to be solved by the invention]
However, in the seat lifting device in such a vehicle, the guide roller is arranged to be inclined upward toward the door opening in order to lift the base plate upward in accordance with the advance toward the door opening. Due to the inclination, the vertical dimension between the front end of the door opening side of the guide rail and the floor is increased, and the height of the vertical position from the floor of the seat cannot be sufficiently suppressed, which is still not satisfactory.
[0005]
[Means for Solving the Problems]
The seat lifting apparatus for a vehicle of the present invention that solves the above problems has the following characteristics.
That is, in claim 1, a lifting mechanism for a seat in a vehicle in which a lifting mechanism is disposed between the floor of the passenger compartment and the seat so that the seat can be raised and lowered between the passenger compartment side and the outer side of the vehicle through the door opening. The lift mechanism is disposed on the floor side and is attached to a guide rail extending substantially linearly toward the door opening so as to be movable in the front-rear direction with respect to the door opening. A substantially linear upper link arm assembled to the upper part so as to be rotatable at the base, a substantially linear lower link arm assembled to the lower part of the base plate so as to be rotatable at the base part, and the tips of both link arms A four-bar linkage mechanism comprising an elevating plate that supports the seat by pivotally connecting parts, and extending the lower link arm rearward from the base of the base plate. Together, characterized by comprising a cam member for movably supporting the engage the link arm engaging portion provided on the lower link arm arranged on the floor side to the engagement surface.
[0006]
According to a second aspect of the present invention, there is provided a lifting device for a seat in a vehicle in which a lifting mechanism is disposed between the floor of the passenger compartment and the seat so that the seat can be raised and lowered between the passenger compartment side and the outer side of the vehicle through the door opening. The lift mechanism is disposed on the floor side and is attached to a guide rail extending substantially linearly toward the door opening so as to be movable in the front-rear direction with respect to the door opening. A substantially linear upper link arm assembled to the upper part so as to be rotatable at the base, a substantially linear lower link arm assembled to the lower part of the base plate so as to be rotatable at the base part, and the tips of both link arms A four-bar linkage mechanism comprising an elevating plate that supports the seat by rotatably connecting parts, and the upper link arm extends rearward from the base of the base plate. Together, characterized by comprising a cam member for movably supporting the engage the link arm engaging portion provided on the upper link arm arranged on the floor side to the engagement surface.
[0007]
According to the first and second aspects, in addition to being able to make both link arms substantially horizontal when the seat is raised to the passenger compartment side, the guide rail disposed on the floor side can be made substantially horizontal. Therefore, the vertical dimension between the link arms and the vertical dimension between the guide rail and the floor can both be reduced, and the height of the seat in the vertical direction from the floor can be sufficiently suppressed.
[0008]
According to a third aspect of the present invention, the cam member disposed on the floor side is detachably provided, and the engagement surface with which the engagement portion is engaged can be changed to another cam member having a different shape. To do.
As a result, by changing to another cam member with a different engagement surface, the seat lift trajectory can be changed, and the simple work of replacing the cam member without requiring changes to the four-bar linkage mechanism or the like. It can be applied to a wide range of vehicles.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
1 to 7 show an example in which the lifting device according to the present invention is applied to a passenger seat of a passenger car, that is, a seat S1 in which a door opening 1 that is opened and closed by a door is formed on the left side. A turning mechanism A1 that can turn at a predetermined angle θ with respect to the floor 2 between the original position (the position shown by the solid line in FIG. 1) and the turning position (the one-dot chain line in FIG. 1 and the position shown in FIG. 2), and the seat A sliding mechanism B1 capable of sliding S1 in the front-rear direction (the left-right direction of the vehicle) with respect to the door opening 1 between the turning position and the sliding position (the position shown by the two-dot chain line in FIG. 1 and FIG. 3); An elevating mechanism C1 is provided that can raise and lower the seat S1 through the door opening 1 between the slide position and a lowering position (a position shown in FIGS. 4 and 5) outside the vehicle.
[0010]
As shown in FIGS. 2 and 5, the turning mechanism A <b> 1 is integrally formed with an inner ring 3 fixed to the floor 2, an outer ring 5 that is rotatably fitted to the inner ring 3 with a ball 4 interposed therebetween, and an upper part of the outer ring 5. The rotating gantry 6 is attached, and a turning fixing device (not shown) for releasably fixing the rotating gantry 6 to the floor 2 at the original position and the turning position.
[0011]
As shown in FIGS. 2, 3, and 5, the slide mechanism B1 includes a base plate guide portion 7A provided on the upper surface of the base plate 7 of the elevating mechanism C1 so as to project upward at the center position in the width direction, and an upper surface of the elevating plate 8. Elevating plate guide portion 8A provided to project upward at the center position in the width direction so as to be aligned with base plate guide portion 7A, and seat plate S1 is supported on the upper portion, and base plate guide portion 7A and elevating plate guide portion 8A are arranged in the width direction. Two rail portions 9A, 9B sandwiched from both sides of the door are provided along the front-rear direction with respect to the door opening 1 with a gap on both sides of the center position in the width direction on its lower surface, and on the base plate 7 and the lift plate 8 The seat mount 9 is slidable in the front-rear direction with respect to the door opening 1, and the seat mount 9 is mounted at the base position and the swivel position. It constitutes a slide fastening device and which is not shown releasably securing to the elevating plate 8 by the slide position with releasably securing the over preparative 7.
[0012]
As shown in FIGS. 2 to 5, the elevating mechanism C <b> 1 is a guide rail that is fixed on a rotary mount 6 on the floor 2 side and extends in a substantially straight line toward the door opening 1. 10, a base plate 7 assembled so as to be movable in the front-rear direction with respect to the door opening 1, which is the sliding direction of the seat S1, via a pair of front and rear guide rollers 11, 12, and rotatable at the base on the upper part of the base plate 7. 2 and FIG. 3, a substantially horizontal upper link arm 13 and a substantially linear shape which is assembled to the lower portion of the base plate 7 so as to be rotatable at the base. 2 and 3, the lower link arm 14 that is substantially horizontal in the state of FIGS. 2 and 3, and the elevating plate 8 that rotatably connects the end portions of the link arms 13 and 14. And a pair of left and right four-bar linkage mechanisms that extend rearward from the base portion of the base plate 7 and are provided with a cylindrical engagement portion 15 that protrudes outward in the width direction and is rotatable at the extended end portion. . The elevating mechanism C1 is detachably attached to a pair of left and right cam attachment portions 16 that are fixed to the outer side in the width direction from the respective guide rails 10 on the rotary mount 6 on the floor 2 side and extend toward the door opening 1. And a cam member 17 that movably supports the lower link arm 14 by engaging the engaging portion 15 of the lower link arm 14 with the engaging surface 17A. As shown in detail in FIGS. 6 and 7, the cam member 17 is interposed between the upper surface of the cam member 17 and the lower surface of the cam mounting portion 16 having an inverted L-shaped cross section with the upper portion bent inward. The shim member 18 can be adjusted, and the lateral position can be adjusted by a collar member 19 interposed between the outer surface of the cam member 16 and the inner surface of the cam mounting portion 16. An insertion hole 21, which is attached to the cam attachment portion 16 by three attachment bolts 20 that pass through the screw 19 and are screwed to the cam attachment portion 16, penetrates the cam attachment portion 16 through which the attachment bolt 20 is inserted. The vertical direction is longer than the outer diameter of the threaded portion of the mounting bolt 20 so as to allow adjustment of the vertical position of 17. The cam member 17 is composed of a horizontal portion with the engagement surface 17A spaced from the door opening 1 and a linear inclined portion that is continuous with the horizontal portion and gradually slopes upward toward the door opening 1. The engagement surface 17A has a different shape (for example, the inclination angle of the inclined portion is changed or the inclined portion is curved), and can be changed to another cam member.
[0013]
The raising / lowering mechanism C1 is lifted / lowered by the driving device 22, and the driving device 22 is supported by the rotary base 6 at both front and rear ends as shown in FIG. A screw shaft 23 arranged in parallel, a nut 24 screwed to the screw shaft 23 and fixed to the lower surface of the base plate 7, and an electric motor 25 that is attached to the rotary mount 6 and rotates the screw shaft 23 forward and backward. Then, by rotating the screw shaft 23 forward with the electric motor 25, the base plate 7 can be advanced toward the door opening 1 with respect to the rotary mount 6, and the screw shaft 23 is rotated reversely with the electric motor 25. Thus, the base plate 7 can be retracted from the door opening 1 with respect to the rotary mount 6.
[0014]
Next, the operation of this configuration will be described.
By sequentially performing the following operations (1) to (3), the seat S1 in the original position shown by the solid line in FIG. 1 is operated to the lowered position outside the vehicle shown in FIGS. It is possible to return to the original position by performing the reverse operation.
(1) In the seat S1 in the original position shown by the solid line in FIG. 1, the fixing by the turning fixing device (not shown) is released, and the seat S1 is moved to the turning position shown in FIG. The swivel base 6 is fixed by the swivel fixing device.
(2) In the seat S1 located at the alternate long and short dash line in FIG. 1 and the turning position shown in FIG. 2, the fixing by the slide fixing device (not shown) is released, and the seat S1 together with the seat mount 9 is The seat mount 9 is fixed to the lift plate 8 by the slide fixing device.
(3) In the seat S1 at the two-dot chain line in FIG. 1 and the slide position shown in FIG. 3, the electric motor 25 is driven to rotate the screw shaft 23 in the forward direction, and the base plate 7 is moved to the position shown in FIGS. Move forward. As the base plate 7 advances, the engaging portion 15 of the lower link arm 14 slides along the engaging surface 17A of the cam member 17, and the seat S1 supported by the seat mounting base 9 is engaged with the engaging surface 17A of the cam member 17. It descends in a horizontal state with an up-and-down trajectory according to the shape.
[0015]
In this embodiment, the engagement portion 15 of the lower link arm 14 slides along the engagement surface 17A of the cam member 17 in accordance with the advancement or retraction of the base plate 7, and the elevation that supports the seat S1 in response thereto. Since the plate 8 descends to the outside of the vehicle or rises to the passenger compartment side, the link arms 13 and 14 can be made substantially horizontal at the ascending position of the elevating plate 8 that supports the seat S1, and in addition, the rotary mount 6 Since the guide rail 10 fixed to the frame can be made substantially horizontal, both the vertical dimension between the link arms 13 and 14 and the vertical dimension between the guide rail 10 and the floor 2 can be reduced. The height of the vertical position from the floor 2 of S1 can be sufficiently suppressed.
[0016]
In this embodiment, the cam member 17 with which the engaging portion 15 of the lower link arm 14 engages with the engaging surface 17A is detachably attached to the cam attaching portion 16 fixed to the rotary mount 6 on the floor 2 side. Therefore, by changing to another cam member having a different engagement surface, the lifting locus of the seat S1 can be changed, and the cam member 17 can be replaced without changing the four-bar linkage mechanism or the like. It can be applied to a wide range of vehicle types with simple operations.
[0017]
Furthermore, in this embodiment, the vertical position of the cam member 17 can be adjusted by a shim member 18 interposed between the upper surface of the cam member 17 and the lower surface of the cam mounting portion 16, and Since the collar member 19 interposed between the side surface and the inner side surface of the cam mounting portion 16 can adjust the horizontal position of the cam member 17, the mounting position of the cam member 17 can be finely adjusted. 17 can be accurately placed on the floor 2 side.
[0018]
8 to 10 show other embodiments of the present invention. The same portions as those in the embodiment are denoted by the same reference numerals and the description thereof will be omitted, and only different portions will be described.
The elevating mechanism C2 is an upper link arm 33 and a lower link arm 34 that are substantially straight and substantially horizontal in the state of FIG. 8, without extending the lower link arm 34 backward from the base portion of the base plate 7. 33 extends backward from the base of the base plate 7. A columnar engaging portion 35 that protrudes outward in the width direction and is rotatable is provided at the extending end of the upper link arm 33, and the engaging portion 35 is engaged with the engaging surface 17 </ b> A of the cam member 17. Thus, the upper link arm 33 is movably supported.
[0019]
In operation, when the base plate 7 is advanced from the position shown in FIG. 9 to the position shown in FIG. 10, the engaging portion 35 of the upper link arm 33 slides along the engaging surface 17A of the cam member 17, and seat mounting is performed. The seat S1 supported by the base 9 descends in a horizontal state along an elevation trajectory corresponding to the shape of the engagement surface 17A of the cam member 17. Conversely, when the base plate 7 is retracted from the position shown in FIG. 10 to the position shown in FIG. 9, the seat S1 rises in the horizontal state.
[0020]
In this other embodiment, the engaging portion 35 of the upper link arm 33 slides along the engaging surface 17A of the cam member 17 in accordance with the advancement or retreat of the base plate 7, and according to this, the elevating and lowering that supports the seat S1. Since the plate 8 descends to the outside of the vehicle or rises to the passenger compartment side, the link arms 33 and 34 can be made substantially horizontal at the ascending position of the elevating plate 8 that supports the seat S1, and in addition, the rotary mount 6 Since the guide rail 10 fixed to the frame can be made substantially horizontal, both the vertical dimension between the link arms 33 and 34 and the vertical dimension between the guide rail 10 and the floor 2 can be reduced. The height of the vertical position from the floor 2 of S1 can be sufficiently suppressed.
[0021]
In this other embodiment, the cam member 17 with which the engaging portion 35 of the upper link arm 33 engages with the engaging surface 17A is detachably attached to the cam attaching portion 16 fixed to the rotary mount 6 on the floor 2 side. Therefore, by changing to another cam member having a different engagement surface, the lifting locus of the seat S1 can be changed, and the cam member 17 can be replaced without changing the four-bar linkage mechanism or the like. It can be applied to a wide range of vehicle types with simple operations.
[0022]
Further, in this other embodiment, the vertical position of the cam member 17 can be adjusted by the shim member 18 and the horizontal position of the cam member 17 can be adjusted by the collar member 19, as in the above-described embodiment. Therefore, the mounting position of the cam member 17 can be finely adjusted, and the cam member 17 can be arranged on the floor 2 side with high accuracy.
[0023]
In each of the above embodiments, the seat S1 is swiveled with respect to the floor 2 by the turning mechanism A1 and slidable by the slide mechanism B1, but the seat S1 is turned with respect to the floor 2. Needless to say, the present invention can also be applied to a device that makes it impossible or supports it so that it cannot slide. In this case, for example, in the state shown in FIG. 2 or FIG. The seat S1 is fixed to the elevating plate 8 so that it cannot be slid.
[0024]
【The invention's effect】
As described above, according to the first and second aspects of the invention, in addition to the fact that both link arms can be made substantially horizontal when the seat is in the raised position on the passenger compartment side, the guide disposed on the floor side. Since the rail can be made substantially horizontal, the vertical dimension between the link arms and the vertical dimension between the guide rail and the floor can both be reduced, and the height of the vertical position from the seat floor can be reduced. This can be sufficiently suppressed.
[0025]
Further, according to the invention described in claim 3, in addition to the effects of the inventions described in claim 1 and claim 2, by changing the engagement surface to another cam member having a different shape, the lift locus of the seat And can be applied to a wide range of vehicle types by a simple operation of replacing the cam member without requiring a change in the four-bar linkage mechanism or the like.
[Brief description of the drawings]
FIG. 1 is a plan view showing an embodiment of a seat that is lifted and lowered by a device according to the present invention.
FIG. 2 is a view from the rear of the vehicle showing an embodiment of the device according to the present invention.
FIG. 3 is a view showing an operating state different from that in FIG. 2 in which the seat is in the sliding position.
4 is a view showing an operating state different from that in FIG. 3 in which the seat is in the lowered position. FIG.
FIG. 5 is a view from an arrow A in FIG. 4;
6 is an enlarged sectional view taken along line BB in FIG.
7 is an enlarged cross-sectional view taken along line CC in FIG. 6. FIG.
FIG. 8 is a rear view of a vehicle according to another embodiment of the present invention.
FIG. 9 is a view showing an operating state different from that in FIG. 8 in which the seat is in the sliding position.
10 is a view showing an operating state different from FIG. 9 in which the seat is in the lowered position.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Door opening part 2 Floor 7 Base plate 8 Elevating plate 13, 33 Upper link arm 14, 34 Lower link arm 15, 35 Engaging part 17 Cam member 17A Engaging surface C1, C2 Elevating mechanism

Claims (3)

A lifting device for a seat in a vehicle in which a lifting mechanism is disposed between the floor of the passenger compartment and the seat, and the seat can be lifted and lowered between the passenger compartment side and the outer side of the vehicle through the door opening. A base rail that is arranged on the floor and extends in a straight line toward the door opening. The base plate is assembled to be movable in the front-rear direction with respect to the door opening. A substantially linear upper link arm assembled to the base plate, a substantially linear lower link arm assembled to the lower part of the base plate so as to be rotatable at the base portion, and the tip ends of these link arms are rotatably connected. And a lift plate that supports the seat, and includes a four-bar linkage mechanism in which the lower link arm extends rearward from the base portion of the base plate and is provided with an engaging portion, and is arranged on the floor side. Seat lifting apparatus in a vehicle, characterized in that it comprises a cam member for movably supporting the engaging said link arm in engagement face engaging portion provided on the lower link arms and. A lifting device for a seat in a vehicle in which a lifting mechanism is disposed between the floor of the passenger compartment and the seat and the seat can be lifted and lowered between the passenger compartment side and the outer side of the vehicle through the door opening. A base rail that is arranged on the floor and extends in a straight line toward the door opening. The base plate is assembled to be movable in the front-rear direction with respect to the door opening. A substantially linear upper link arm assembled to the base plate, a substantially linear lower link arm assembled to the lower part of the base plate so as to be rotatable at the base portion, and the tip ends of these link arms are rotatably connected. And a lift plate that supports the seat, and includes a four-bar linkage mechanism in which the upper link arm extends rearward from the base portion of the base plate and is provided with an engaging portion, and is arranged on the floor side. Seat lifting apparatus in a vehicle, characterized in that it comprises a cam member for movably supporting the engaging said link arm in engagement face engaging portion provided on the upper link arm and. The cam member disposed on the floor side is detachably provided, and the engagement surface with which the previous engagement portion engages can be changed to another cam member having a different shape. The seat lifting apparatus in the vehicle according to claim 2.

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