JP2002248973A - Vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the height of a seat cushion, and obtain a light and inexpensive reinforced structure for which a substantial reinforcing of movable and fixed rails is unnecessary even if a separative, excessive load is applied on the movable rails of a left-and-right slide device. SOLUTION: The left-and-right slide device 31 is arranged between a left-and- right pair of upper rails 23 of a back-and-forth slide device 21, wherein the back-and-forth pair of movable rails 33 form the back-and-forth frames of the seat cushion. A separation-blocking bracket 75 with an almost U-shape cross section is provided on the front fixed rail 32 in the way that the bracket covers the fixed rail. The pair of upper ends 75a of the separation-blocking bracket 75 is fixed to the movable rail 33, wherein the bracket is fitted on the fixed rail 32 so as to be able to move along the rail extension. When the movable rail 33 receives an impact load working upward, the bottom 75b of the separation-blocking bracket 75 with the almost U-shape cross section is connected to the fixed rail 32 to be stopped.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle seat, and more particularly, to a pair of left and right lower rails embedded in the front-rear direction of a seat mounting floor surface, and slides longitudinally on the lower rails. A front-rear sliding device composed of a pair of left and right upper rails freely guided and supported, a pair of front and rear fixed rails provided between the pair of left and right upper rails, and slidably provided in the left-right direction with respect to the fixed rails. The present invention relates to a vehicle seat including a left and right slide device including a pair of movable rails.

[0002]

2. Description of the Related Art Generally, a vehicle seat is provided with a seat cushion and a seat main body comprising a seat back and the like provided upright and rotatably adjustable behind the seat cushion. By supporting the vehicle body on the floor via a front-rear slide device, the vehicle body is configured to be able to slide and adjust in the front-rear direction, so that the layout of seats in the vehicle compartment can be variously changed.

[0003] Such a seat back-and-forth sliding device includes:
Generally, it is formed of a lower rail formed on the seat mounting floor side of the vehicle body in the front-rear direction and an upper rail mounted and fixed on the seat body side. 8 (a),
As shown in (b), a pair of front and rear left and right slide devices 1 each including a fixed rail 3 and a movable rail 5 are provided on the floor surface 4 of the vehicle body. A pair of left and right lower rails 8 of a front and rear slide device 7 are provided, and a pair of left and right upper rails 9 slidably guided in the front and rear direction are provided on the pair of left and right lower rails 8. It is fixed to a bracket 9a fixed to the rail 9 and the like.

[0004]

However, in the case where the conventional vehicle seat left-right slide device 1 and the front-back slide device 7 are used as described above, a horizontally long left-right slide device is provided below the front-back slide device 7. 1 has the disadvantage that the height of the seat cushion is high,
Further, the use area of the floor 4 of the vehicle body is increased, and the floor surface 4 of the vehicle body is increased.
Has the disadvantage of increasing the restrictions. In addition, the upper rail 9 and the seat frame 10 of the front and rear slide device 7 have to be separately formed, which has a disadvantage of increasing the number of parts. Further, when the conventional front-rear slide device 7 is used as inverted, the operation lever of the lock mechanism of the front-rear slide device 7 is on the fixed side, and when the seat frame 10 of the seat cushion is moved in the lateral direction, the operation lever is operated. When the vehicle seat receives an impact due to a rear collision, an excessive load in the peeling direction is applied to the movable rail 5 of the left and right slide device 1 at the front of the left and right slide device 1. Therefore, it is necessary to significantly increase the strength of the left and right slide device 1.

An object of the present invention is to reduce the height of the seat cushion and improve the strength in the vertical direction. In particular, an excessive load is applied to the movable rail of the left and right slide device in the peeling direction. In this case, a lightweight and inexpensive rational reinforcement structure can be obtained without significantly increasing the strength of the movable rails and fixed rails. A vehicle in which the operation lever can be provided on the seat cushion side, the locking mechanism can be provided with sufficient strength without being overhanged, the seat weight can be reduced, and a configuration that is inexpensive can be obtained. To provide a sheet for use.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and a vehicle seat according to a first aspect of the present invention is provided in a front-rear direction of a seat mounting floor. A pair of left and right lower rails, a pair of left and right upper rails slidably guided in the longitudinal direction on the lower rails, and a pair of front and rear fixed rails provided between the pair of left and right upper rails. And a left and right slide device comprising a pair of front and rear movable rails slidably provided in the left and right direction with respect to the fixed rail, wherein the pair of front and rear movable rails of the left and right slide device is a seat cushion. A front and rear seat frame is provided, and a peel-off preventing bracket is provided so as to wrap the fixed rail or the movable rail at the front part, and the movable rail is positioned upward. When subjected to the impact load, peeling prevention bracket characterized by restricting the upward movement of the movable rail.

According to a second aspect of the present invention, in the vehicle seat, the peel-prevention bracket is formed to have a substantially U-shaped cross section, and a pair of upper ends of the peel-prevention bracket are fixed to a movable rail. Is normally mounted movably in the longitudinal direction with respect to the fixed rail, and when the movable rail receives an upward impact load, the bottom of the peel prevention bracket having a substantially U-shaped cross section is locked to the fixed rail. It is characterized by that.

According to a third aspect of the present invention, in the vehicle seat, the peel-prevention bracket is formed to have a substantially inverted U-shaped cross section, and a pair of lower ends of the peel-prevention bracket is fixed to a fixed rail side. The prevention bracket is normally attached to the movable rail in a non-contact manner, and when the movable rail receives an upward impact load, the movable rail is locked on the upper part of the substantially U-shaped cross-section peeling prevention bracket. It is characterized by that.

In the vehicle seat according to a fourth aspect of the present invention, a lock mechanism for a left-right slide device is provided between the fixed rail at the rear and the movable rail, and the lock mechanism is a latch provided on the fixed rail. And a plurality of lock holes provided on a movable rail into which a latch claw at the tip of the latch is inserted, and an operation lever attached to a seat frame side for operating the latch.

The vehicle seat according to a fifth aspect of the present invention is characterized in that the peel-prevention bracket is provided substantially at the center of the movable rail in the longitudinal direction.

A vehicle seat according to a sixth aspect of the present invention is characterized in that a plurality of the peel prevention brackets are fixed to the fixed rail side at appropriate intervals.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A vehicle seat according to the present invention will be described below in detail with reference to the drawings. FIGS. 1 to 6 show an embodiment of a vehicle seat according to the present invention.
Is a perspective view of a seat frame configuration of the vehicle seat of the present invention and a front-rear slide device, a left-right slide device,
2 shows a partial side view of the same, and FIG. 3 shows a front view of a bracket and a front-rear sliding device fitted to a horizontal rod.
FIG. 4 is a perspective view of the operation lever portion of the lock mechanism of the left and right slide device, FIG. 5 is a front view of the front left and right slide device, and FIG. 6 is a cross-sectional view of the left and right slide device. Have been.

The vehicle seat 11 includes a seat cushion 12.
And a seat back, but illustration of the seat back is omitted. As shown in FIGS. 1 and 2, a front-rear slide device 21 and a left-right slide device 31 are provided between the seat cushion 12 and the vehicle body floor 4, and the seat cushion 12 and the seat back of the vehicle seat 11 are provided. The vehicle seat is slidably supported in the front-rear direction and the left-right direction. When the left and right slide device 31 is operated, a space in the left-right direction can be secured by detaching or moving the center sheet or the like or moving it back and forth.

The front-rear sliding device 21 includes a lower rail 22 disposed in the front-rear direction of the sheet mounting floor 4 and an upper rail 23 guided and supported on the lower rail 22 so as to be slidable in the longitudinal direction. . By providing the front-rear sliding device 21 on the seat mounting floor 4, the vehicle seat 11 having the left-right sliding device 31 on the floor 4 can be provided.

The front-rear slide device 21 is formed by extrusion molding from a light alloy such as an aluminum die cast or a magnesium alloy. A front leg 25 and a rear leg 26 are provided at front and rear positions of the lower rail 22. In addition, front leg 2
The lower rail 22 may be directly fixed to the floor 4 by omitting the rear rail 5 and the rear leg 26.

As shown in FIG. 3, the lower rail 22 of the front-rear slide device 21 has a body portion 2 having a substantially upward U-shape.
2a, and a pair of left and right upper portions 22d, 22d, which are bent inward from the front end sides of both sides of the main body portion 22a and extend to form an opening 22e.

The upper rail 23 of the front-rear sliding device 21 has a main body 23a which is mounted inside the main body 22a of the lower rail 22, and projects upward from the center of the main body 23a. It has a vertical wall 23e protruding above the opening 22e of 22d, 22d.

As shown in FIG. 1, the front-rear slide device 21 is adjusted in the front-rear position by a lock mechanism, which is formed by a latch 29 provided on the upper rail 23 side and a lock hole 30 provided on the lower rail 22 side. Have been. The latch 29 is pulled out of the lock hole 30 by operating the operation lever 28 of the lock mechanism, and the lock is released.

A pair of left and right slide devices 31 is provided between the pair of left and right upper rails 23.
The pair of front and rear left and right slide devices 31 may have different front and rear left and right slide devices 31. The left and right slide device 31 includes a pair of front and rear fixed rails 32,
A pair of front and rear movable rails 33 are provided slidably in the left-right direction with respect to the fixed rails 32.

As shown in FIGS. 2 and 4, the fixed rail 32 of at least the rear left and right slide device 31 is formed in a substantially T shape, and the vertical portion 32a is fixed to the vertical wall 23e of the upper rail 23 by the cushion bracket 35. ing. The movable rail 33 includes a main body 33a having a substantially downward U-shape, and a pair of front and rear lower ends 33d extending inward from lower ends of both sides of the main body 33a to form an opening 33e. I have. The front left / right slide device 31 can also be configured as described above.

The movable rail 3 of the left and right slide device 31
A substantially T-shaped horizontal portion 32b of the fixed rail 32 is fitted to the third main body portion 33a. Vertical part 3 of the fixed rail 32
By adjusting the length of 2a, the height of the front and rear left and right slide devices 31 can be made different. The left / right slide device 31 is adjusted in the left / right position by a lock mechanism 61, and the lock mechanism 61 is unlocked by operating the operation lever 37.

The movable rail 3 of the left and right slide device 31
Reference numeral 3 denotes front and rear frames of the seat cushion 12. That is, the seat frame 41 of the seat cushion 12
Is formed by a pair of front and rear movable rails 33 and panel-shaped side frames 43. The side frames 43
The main body 33a of the movable rail 33 is fitted into the concave 44 and fixed by welding or the like.

Further, both ends of the horizontal rod 45 are fixed at intermediate positions of the both side frames 43, respectively. A bracket 46 is slidably fitted to the horizontal rod 45. The bracket 46 has a fitting portion 46a that fits into the horizontal rod 45, and the fitting portion 46a is configured to be slidable with respect to the horizontal rod 45 at normal times. Reference numeral 55 denotes a belt mounting portion of the seat belt.

As shown in FIG. 3, a fixing portion 46b is formed at a position extending downward from the fitting portion 46a of the bracket 46. The operation shaft 28 a of the operation lever 28 for operating the lock mechanism of the front-rear slide device 21 is supported by a support bracket 52. Operation shaft 2 of operation lever 28
The latch 29 is attached to 8a. A fixing portion 46b between the support bracket 52 and the bracket 46 is fixed to a vertical wall 23e of the upper rail 23 of the front-rear sliding device 21 by a bolt 53.

Therefore, the fitting portion 46a of the bracket 46 is normally slidable with respect to the lateral rod 45. However, when a large load is applied from the belt anchor side of the seat belt, the fitting part 46a comes into contact with the lateral rod 45. The load is transmitted from the upper rail 23 of the front and rear slide device 21 to the lower rail 22.
Also, as shown in FIG. 1, when the seat cushion 12 is moved to the right by the left and right slide device 31 and a pulling force is applied to the belt mounting portion 55 of the right side frame 43 from the seat belt side, the horizontal rod 45 and bracket 46
Is supported by the fitting with the fitting portion 46a, the tensile force is transmitted to the front-rear sliding device 21, and the strength can be maintained.

Further, a plurality of laterally extending wire frames 47 corresponding to the front and rear positions of the side frames 43 and the seating portions are fixed. A plurality of wire frames 49 extending in the front-rear direction at appropriate intervals are fixed to the wire frame 47 extending in the front-rear direction at appropriate intervals between the front and rear movable rails 33 of the left-right slide device 31, and pad materials (not shown) are placed thereon. A trim wire 51 is fixed along the outer peripheral edge of the seat frame 41.

As shown in FIG. 4, the lock mechanism 61 of the left and right slide device 31 includes a lock hole 63 formed in the movable rail 33 and a vertical portion 32a of the fixed rail 32 formed in a substantially T shape. And a latch 65 attached to the bracket 35. The latch claw 65a at the tip of the latch 65 is inserted into the lock hole 63 and the lock mechanism 6
A lock state of 1 is obtained.

The latch 65 is attached to a rotating shaft 66, and an operating piece 68 projecting forward is connected to the latch 65. A rotating shaft 38 extending in the left-right direction is connected to the operating lever 37. Both ends of a crank-shaped operating wire 70 extending centrally in the left-right direction parallel to the rotating shaft 38 are connected to the rotating shaft 38. The operation wire 70 and the operation lever 37 move in the left-right direction as the seat frame 41 moves in the left-right direction.

The operation piece 68 of the fixed rail 32 protruding forward at any position in the left-right direction of the operation wire 70 is operated by the rotation of the operation wire 70, and the operation piece 68 causes the latch claw of the latch 65 to operate. The locked state between the locking hole 65a and the locking hole 63 is released, and the left and right positions of the seat frame 41 can be adjusted.

As shown in FIGS. 5 and 6, a peel-off preventing bracket 75 is fixed to the movable rail 33 at the front of the left and right slide device 31 so as to surround the substantially U-shaped fixed rail 32. . The peel prevention bracket 75
Is formed in a substantially U-shaped cross section.
The pair of upper ends 75 a, 75 a of 5 are fixed to the side of the main body 33 a of the movable rail 33.

The peel prevention bracket 75 is normally movably attached to the fixed rail 32 in the longitudinal direction.
When the movable rail 33 receives an upward impact load,
A bottom portion 75 b of the separation preventing bracket 75 having a substantially U-shaped cross section is locked to a bottom portion of the fixed rail 32.

By providing the peel prevention bracket 75 substantially at the center of the movable rail 33 in the longitudinal direction, the substantially center position of the seat cushion 12 can be always locked when the movable rail 33 moves in the left-right direction. . Also, a plurality of peeling prevention brackets 75 can be provided.

FIG. 7 shows a peel prevention bracket 77 of the present invention.
The peel prevention bracket 77 is fixed to the front cushion bracket 35 supporting the fixed rail 32 so as to surround the front movable rail 33. The separation preventing bracket 77 is formed in a substantially inverted U-shaped cross section, and a pair of lower ends 77a, 77a of the separation preventing bracket 77 are fixed to the cushion bracket 35 on the fixed rail 32 side.

The peel prevention bracket 77 is normally attached to the movable rail 33 in a non-contact manner, and when the movable rail 33 receives an upward impact load, the peel prevention bracket 77 has a substantially inverted U-shaped cross section. The main body portion 33a of the movable rail 33 is locked to the upper portion 77b of the movable rail 33, and an impact load is transmitted to the cushion bracket 35 side.

By fixing a plurality of peel prevention brackets 77 to the fixed rail 32 at appropriate intervals, the substantially center position of the seat cushion 12 is always locked when the movable rail 33 moves to the maximum in the left-right direction. can do.
Further, the peel prevention bracket 77 may be directly fixed to the fixed rail 32.

The present invention is not limited to the structure of the embodiment described above, but includes a lock mechanism for the front-rear slide device 21, a lock mechanism 61 for the left-right slide device 31, and the peel prevention bracket 7.
The shape, structure, etc. of each part such as 5, 77 can be freely modified and changed as necessary, including the shape and material,
Various modifications may be considered.

[0037]

The above is the embodiment of the vehicle seat according to the present invention. According to the vehicle seat according to the first aspect, the pair of front and rear movable rails of the left and right slide device are formed by the front and rear seat frames of the seat cushion. A peel-prevention bracket is provided so as to wrap the fixed rail or the movable rail at the front part, and when the movable rail receives an upward impact load, the peel-prevention bracket prevents the movable rail from moving upward. Because of the restriction, the height of the seat cushion can be kept low and the strength in the vertical direction can be improved, especially when an excessive load in the peeling direction is applied to the front movable rail of the left and right slide device. The lightweight and inexpensive rational reinforcement structure can be obtained without significantly increasing the strength of the movable rail and the fixed rail, and a separate peel-off prevention bracket is formed Because it is, you can share the right and left slide device before and after the left and right sliding device, thereby improving the versatility.

According to the vehicle seat of the second aspect of the present invention, the anti-peeling bracket is formed to have a substantially U-shaped cross section, and a pair of upper ends of the anti-peeling bracket are fixed to the movable rail, The anti-peeling bracket is normally mounted movably in the longitudinal direction with respect to the fixed rail, and when the movable rail receives an upward impact load, the section is substantially U-shaped.
Because the bottom of the V-shaped peel prevention bracket is locked to the fixed rail, the strength of the movable rail and the fixed rail is significantly increased when an excessive load is applied to the movable rail at the front of the left and right slide device in the peeling direction. Thus, it is possible to obtain a lightweight and inexpensive rational reinforcement structure without performing the above.

According to the vehicle seat of the third aspect of the present invention, the anti-peeling bracket is formed in a substantially inverted U-shaped cross section, and a pair of lower ends of the anti-peeling bracket are fixed to the fixed rail side. The peel-prevention bracket is normally mounted in a non-contact manner with respect to the movable rail, and when the movable rail receives an upward impact load, the movable rail is mounted on the upper part of the substantially reverse U-shaped cross-section peel-prevention bracket. Are locked, so that when an excessive load in the peeling direction is applied to the movable rail at the front of the left and right slide device, the movable rail and the fixed rail do not significantly increase the strength and are lightweight and inexpensive. A reinforcing structure can be obtained.

Further, according to the vehicle seat of the fourth aspect of the present invention, a lock mechanism of the left and right slide device is provided between the fixed rail at the rear and the movable rail, and the lock mechanism is attached to the fixed rail. Since there are provided a latch, a plurality of lock holes provided on a movable rail into which a latch claw at a tip of the latch is inserted, and an operation lever attached to a seat frame side for operating the latch, The operation lever can be provided on the seat cushion side even when the conventional front-rear slide device is reversed and used for the left-right slide device, the locking mechanism does not become overhanging, and sufficient strength can be obtained, and the weight of the seat can be obtained. Can be reduced, and an inexpensive configuration can be obtained.

According to the vehicle seat of the fifth aspect of the present invention, since the peeling prevention bracket is provided substantially at the center of the movable rail in the longitudinal direction, when the movable rail moves in the left-right direction. , The substantially center position of the seat cushion can always be locked.

According to the vehicle seat of the sixth aspect of the present invention, since the plurality of peeling-prevention brackets are fixed to the fixed rail at appropriate intervals, the movable rail moves in the left-right direction. At this time, the substantially center position of the seat cushion can be always locked.

[Brief description of the drawings]

FIG. 1 is a perspective view of a frame configuration of a seat cushion of a vehicle seat according to the present invention.

FIG. 2 is a partial side view of a frame structure of a seat cushion of a vehicle seat according to the present invention.

FIG. 3 is a front view of a bracket and a front-rear sliding device fitted to a lateral rod of the vehicle seat according to the present invention.

FIG. 4 is a perspective view of a lock mechanism of the left and right sliding device for a vehicle seat according to the present invention.

FIG. 5 is a front view of a left and right sliding device for a front portion of the vehicle seat according to the present invention.

FIG. 6 is a cross-sectional view of a peel prevention bracket of the left and right sliding device for the front portion of the vehicle seat according to the present invention.

FIG. 7 is a cross-sectional view of another embodiment of the peeling prevention bracket of the left and right sliding device for the front portion of the vehicle seat according to the present invention.

8 (a) and 8 (b) show a conventional front and rear sliding device and a left and right sliding device for a vehicle seat, wherein FIG. 8 (a) is a side view and FIG.
Is a front view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 21 Front-back sliding device 22 Lower rail 22a Main body 22d Upper part 22e Opening 23 Upper rail 23a Main body 23e Vertical wall 25 Front leg 26 Rear leg 28 Operating lever 28a Operating shaft 29 Latch 30 Lock hole 31 Left-right sliding device 32 Fixed rail 32a Vertical portion 32b Horizontal section 33 Movable rail 33a Main body section 33d Lower end section 33e Opening section 35 Cushion bracket 37 Operating lever 38 Rotating shaft 41 Seat frame 43 Side frame 44 Depression 45 Horizontal rod 46 Bracket 47 Wire frame 49 Wire frame 51 Wire for trim 52 Support Bracket 53 Bolt 61 Lock Mechanism 63 Lock Hole 65 Latch 66 Rotating Axis 68 Actuating Piece 70 Operating Wire 75 Peeling Prevention Bracket 77 Peeling Prevention Bracket

Claims (6)

[Claims] 1. A front-rear sliding device comprising a pair of left and right lower rails disposed in the front-rear direction of a sheet mounting floor surface and a pair of left and right upper rails slidably guided and supported in the longitudinal direction on the lower rails. A vehicle comprising: a pair of front and rear fixed rails provided between the pair of left and right upper rails; and a pair of front and rear movable rails slidably provided in the left and right direction with respect to the fixed rails. In the seat for use, a pair of front and rear movable rails of the left and right slide device constitute a front and rear seat frame of a seat cushion, and a separation preventing bracket is provided so as to wrap the fixed rail or the movable rail of the front part, and the movable rail is moved upward. Vehicle, characterized in that the peel-prevention bracket regulates upward movement of the movable rail when subjected to an impact load of Use sheet. 2. The peel-prevention bracket is formed to have a substantially U-shaped cross section, and a pair of upper ends of the peel-prevention bracket is fixed to a movable rail. When the movable rail is subjected to an upward impact load, the section is substantially U-shaped.
The vehicle seat according to claim 1, wherein a bottom of the character-shaped peel prevention bracket is locked to a fixed rail. 3. The peel-prevention bracket is formed to have a substantially inverted U-shaped cross section, and a pair of lower ends of the peel-prevention bracket is fixed to a fixed rail side. The movable rail is attached to an upper part of a peeling prevention bracket having a substantially U-shaped cross section when the movable rail receives an upward impact load. Vehicle seat. 4. A lock mechanism for a left-right slide device is provided between the fixed rail at the rear and the movable rail, and the lock mechanism is provided with a latch provided on the fixed rail and a latch claw at a tip end of the latch. 4. The vehicle according to claim 1, further comprising a plurality of lock holes provided on the movable rail, and an operation lever attached to a seat frame side for operating the latch. Vehicle seat. 5. The vehicle seat according to claim 2, wherein the peel prevention bracket is provided substantially at the center of the movable rail in the longitudinal direction. 6. The vehicle seat according to claim 3, wherein a plurality of the peel prevention brackets are fixed to the fixed rail side at appropriate intervals.