JPH03159828A - Seat slide device - Google Patents

Abstract

PURPOSE:To improve the lock synchronizing performance of upper rails by connecting the respective lower rails of an inner and an outer rails by connecting members, and fitting the inner and outer rails to a vehicle body through these connecting members. CONSTITUTION:A seat slide device 5 in the front seat of an automobile is provided with a pair of an inner rail 7 and an outer rail 8 disposed on bilateral sides along the longitudinal direction of a vehicle body, and lock mechanisms 9, 10 are provided respectively on the inner and outer rails 7, 8. The inner and outer rails are respectively formed of lower rail 18, 19 fixed to a body floor 6, and upper rails 20, 21, fixed to a seat cushion, slidably on the lower rails 18, 19. In this case, the lower rails 18, 19 are mutually connected at their longitudinal end parts by a first and a second connecting members 29, 30. The respective connecting members 29, 30 are fixed to undersides of the lower rails 18, 19 and to the body floor 6 side.

Description

[Detailed Description of the Invention] a. INDUSTRIAL APPLICATION FIELD OF THE INVENTION The present invention relates to a seat slide device for adjusting the longitudinal position of an automobile seat or the like.

b. 2. Description of the Related Art Conventionally, a front seat 5l shown in FIG. 4 is mounted on a vehicle body floor 53 in a state where its position can be adjusted in the longitudinal direction of the vehicle body via a seat slide device 52 as shown in FIGS. 4 to 7. installed. The seat slide device 52 includes a pair of inner rails 54 and outer rails 55 arranged at a constant interval on both left and right sides, and each of the inner rails 54 and outer rails 55 has a lock mechanism 56. 57 are provided. An operating lever 58 is attached to one of the locking mechanisms 56 for operating the locking mechanism in the unlocking direction. In addition, these left and right lock mechanisms 56. 57 are interlockably connected to each other via a connecting wire 59, thereby forming a seat slide device 52 of a both-side lock type.

The inner rail 54 and the outer rail 55 each have an upper rail 60 that fits into each other. 61 and lower rail 62. 63, and the seat manufacturer has an upper rail 60. 61 is the mounting hole 64 provided on the front and rear
, 65, 66. 67 and is tightened and fixed to the cushion frame of the front seat 51 with bolts or the like. Also lower rail 62. Insertion holes 6B, 69, 70. Buquerat 72 with 71
, 73, 74, and 75 are fixed, and screw holes 76. 77, 78. Cross member 80 and mounting bracket 81 provided with 79
．． 82 is welded.

The front seat 51 delivered by the seat manufacturer has an upper rail 60. 61 to lower rail 62
, 63, it is attached to the vehicle body floor 53 so that its position can be adjusted.

C. Problems to be Solved by the Invention However, the above-mentioned conventional seat slide device 52
In this case, it is almost impossible to improve the dimensional accuracy of the rail mounting positions on the front seat 5l side and the vehicle floor 53 side of the inner rail 54 and outer rail 55, which are formed separately. Upper rail 6 as shown
0. 61 mounting holes 64, 65. The front and back position of 6667 is a mm between the inner rail 54 and outer rail 55.
While the lower rail 62. Brackets 72, 73, 74 provided on 63. 75 insertion holes 6B, 69
, 70. The front and back positions of 71 match without deviation between the inner rail 54 and the outer rail 55,
By rotating the operating lever 58, the upper rail 60, which is a slide rail, is rotated. 61, the inner rail 54 and outer rail 5
5 locking mechanism 56. 57 were not synchronized, and one of the inner rails 54 and outer rails 55 could not be locked.

That is, in FIG. 6, the upper rail 60 of the inner rail 54 example is shown by a solid line, and the mounting position of the upper rail 6l on the outer rail 55 side is shifted as shown by a broken line.
When the lower rails 62 and 63 are viewed from the side, the inner rail 54 and the outer rail 55 are aligned. However, upper rail 60. 61 to the cushion frame, if only the inner rail 54 side is locked because it is misaligned in the front and back direction, the lock hole A position of the lower rail 62 and the inner lock pin B position of the upper rail 60 match if. However, the outer lock pin C of the outer rail 60 is inserted a from the lock hole A of the lower rail 63.
Since it is located far away from Inffl, it cannot be locked. Therefore, both upper rails 60. 61 will not be synchronized.

Conversely, the upper rail of 51 front seats is 60. 6
The front and rear mounting positions of 1 are the inner rail 54 and the outer rail 5.
5 and lower rail 6 on the vehicle body floor 53 side.
Also, if the front and rear mounting positions of the inner rail 54 and the outer rail 55 of the inner rail 54 and the outer rail 55 are different, synchronization will not occur.

By the way, rear seat occupants tend to put their feet under the front seat 51. For this reason, in the conventional seat slide device 52, as shown in FIG. 7, in order to secure the foot space S, the inner rail 54 and the outer rail 55 are arranged with as wide a gap as possible on both sides of the front seat 51, so that the foot space S is secured. I try not to get in the way. However, as the distance l between the inner rail 54 and the outer rail 55 that support the cushion frame 83 in the front seat 51 increases, the deflection at the central portion m of the cushion frame 83 increases accordingly. 5. The strength of the beam 83 has to be increased, which has the disadvantage of increasing parts cost. On the other hand, if the distance l between the inner rail 54 and the outer rail 55 is narrowed, the rigidity of the cushion frame 83 can be lowered, but the mount bracket 81. 82 must make a big impression. Therefore, since the mount I/bracket 8L 82 is closer to the seat center side, there is a drawback that the foot space for the rear seat occupant is impaired in the lateral direction.

The present invention has been made in view of the above-mentioned circumstances, and an object thereof is to provide a seat slide device that can eliminate the above-mentioned drawbacks.

d. Means for Solving the Problems In order to solve the problems of the above-mentioned prior art, the present invention provides a lower rail that is fixed to the vehicle body side and a lower rail that is fixed to the seat side and is movably mounted by fitting into the lower rail. An inner rail and an outer rail each having an upper rail that can be mounted are arranged on both left and right sides along the longitudinal direction of the vehicle body, and a locking mechanism is provided on each of the inner rail and the outer rail, and the locking mechanism is disposed on one of these locking mechanisms. In the seat slide device that adjusts the longitudinal position of the seat by unlocking the locking mechanism with an operating lever, the lower rails of the inner rail and the outer rail are connected to each other by a connecting member, and the lower rail of the inner rail and the lower rail of the outer rail are connected to each other by a connecting member, and the The inner rail and outer rail are attached to the vehicle body.

e. EXAMPLES The present invention will be explained in detail below based on illustrated examples.

1 to 3 show an embodiment of a seat slide device according to the present invention. In the figure, reference numeral 1 denotes a front seat disposed in the interior of an automobile 2, and the front seat 1 is shaped by a seat cushion 3 on which a passenger sits and a seat back 4 that receives the back of the seated passenger. ing.

The front seat 1 is attached to a vehicle body floor 6 or the like through a seat slide device 5 so that its position can be adjusted in the longitudinal direction of the vehicle body. Thus, the seat slide device 5 includes a pair of inner rails 7 and outer rails 8 that are arranged at a constant interval on both left and right sides along the longitudinal direction of the vehicle body.
The inner rail 7 and the outer rail 8 are provided with lock mechanisms 9 and 10, respectively. Of the locking mechanisms 9 and 10, for example, the locking mechanism 9 on the inner rail 7 side is attached with an operating lever 11 for operating the locking mechanism in the unlocking direction.

Note that the vehicle body floor 6 is provided with a cross member l2 extending in the direction of the inside of the vehicle and a tunnel portion 13 extending in the longitudinal direction of the vehicle body, and screw holes 14, 15, 16. 17
is in great shape.

The inner rail 7 and the outer rail 8 are comprised of lower rails 18 and 19 that are tightened and fixed to the vehicle floor 6 side, and lower rails 18 and 19 that are tightened and fixed to the seat cushion 3 side.
Upper rail 20. which is movably attached by fitting into 19. 21, and inside the seat cushion 3 there is a cushion frame 22 and mounting brackets welded to both left and right sides of the cushion frame 22}23. 24 are provided. Therefore, there are mounting holes 2 at the front and rear ends of the upper rail 20.21.
5, 26. 27. 28 is bored, and the upper rail 20. 21 are these mounting holes 25, 26, 27
．． Mounting bracket 23.24 with bolt etc. through 28
It is designed to be tightened and fixed.

Further, the lower rails 18 and 19 of the inner rail 7 and the outer rail 8 have first and second connecting members 29 at their front and rear ends. 30, the first and second connecting members 29. 30
is lower rail 18. It is fixed to the bottom surface of 19. The first connecting member 29 is fixed to the cross member 12, so it has a flat plate shape, and has screw holes 15 of the cross member l2 at both left and right ends. 16 and corresponding to the elongated holes 31. 3
2 is provided. Further, since the second connecting member 30 is fixed to the vehicle body floor 6 and the tunnel portion 13, both left and right ends thereof are bent downward or upward into a crank shape, and the second connecting member 30 is fixed to the vehicle body floor 6 and the tunnel portion 13. Screw hole 14. 17 correspond to the elongated holes 33. 34
is provided. However, the lower rail 18. 19 is a first and second connecting member 29. 30 long holes 31, 32. 33. 34 and bolts 35 etc. to the vehicle body floor 6 and cross member l2.
and screw holes 14, 15, 16 in the tunnel portion 13.
17, it is tightened and fixed to the vehicle body floor 6 including the cross member 12 and the tunnel portion l3. That is, the inner rail 7 and the outer rail 8
are the first and second connecting members 29. It is attached to the vehicle body side via 30, and is arranged so as to be placed above the vehicle body floor 6.

Note that the lock mechanism 9.10 is connected to the upper rail 20.
21, and the hook 36 fixed to the operating lever l1 and the shaft 3 on the outer rail 8 side
A hook 36 fixed to 7 is connected to the hook 36 by a connecting wire 38 so as to be able to interlock with each other. However, hook 3
The tip of 6 is connected to the upper rail 20. Pass through 21 and lower rail 18. It is adapted to engage with a plurality of locking portions (not shown) provided at intervals in the longitudinal force direction of 19,
With this, both sides lock type seat slide device 5
is in charge.

=10 In the seat slide device 5 constructed as above, the first and second connecting members 29. 30, the lower rail 18 of the inner rail 7 and the outer rail 8. Since the front and back positions of the seat cushions 19 are aligned and are attached to the vehicle floor 6, etc., the seat cushion 3's mounting bracket 23. 24 with bolts, etc., and in this state, attach the upper rail 20. 21 to the lower rail 18. 19 and install it, both side rails 20. 21 will surely be synchronized. Moreover,
Vehicle floor 6, cross member l2 and tunnel section 13
Connecting members 29.corresponding to screw holes 14, 15, 16.17. 30 holes 31. 32, 33. 34 is
Because they are shaped like long holes, even if the front and rear positions of the screw holes 15 and 16 and the screw holes 14 and 17 are slightly off due to lack of precision, the upper rail 20. 21 can be synchronized.

Moreover, the inner rail 7 and the outer rail 8 are connected to the connecting member 29. 30, the first connecting member 29 is fastened to the cross member 12, and the second connecting member 30 is fastened to the vehicle body floor 6 and the tunnel part 13, so that the structure is supported on both sides, which is advantageous in terms of strength. The cushion frame 22 is disposed above the vehicle body floor 6, and compared to the conventional example which is cantilevered, the span L is smaller than the conventional span L, and the deflection at the center point m of the cushion frame 22 is also reduced. Furthermore, in the conventional example, the cross member 1 was used to prevent vehicle body deformation and torsional rigidity in the event of a collision between the inner rail 7 and the outer rail 8.
2 played the main role, but the connecting member 29. 30 is arranged along the inside direction of the vehicle, so that it also serves as reinforcement for the vehicle body. Furthermore, since the foot space S is also wider in the lateral direction than in the conventional type, it becomes possible for the rear seat occupant's feet to be easily placed in the lower part of the front seat 1.

Although one embodiment of the present invention has been described above, the present invention is not limited to the embodiment described above, and various modifications and changes can be made based on the technical idea of the present invention.

For example, in the embodiment described above, the lower rail 18 of the inner rail 7 and the outer rail 8. 19 to the first and second connecting members 29. Although the two parts of 30 are connected, the same effect can be achieved even if the connection is made using one connecting member made of one press-shaped product.

f. Effects of the Invention As described above, the seat slide device according to the present invention connects the lower rails of the inner rail and the outer rail, which are arranged on both left and right sides along the longitudinal direction of the vehicle body, to each other by a connecting member, and also connects the lower rails of the inner rail and the outer rail to each other through the connecting member. Since the rail and outer rail are attached to the vehicle body, the lock synchronization of the upper rail movably attached to the lower rail is improved, and both rails can be reliably synchronized.

Moreover, in the seat slide device of the present invention, since the connecting member also serves as reinforcement against deformation of the pitch between the rails of the vehicle body floor and the pitch between the rails of the cushion frame, the strength of the entire device can be increased.

In addition, in the seat slide device of the present invention, the pitch of the upper rail can be arbitrarily selected and arranged regardless of vehicle body constraints and rear seat foot space constraints, and the pitch of the upper rail can be shortened and the cushion Since it is possible to reduce the deflection in the center of the frame, there is no need to increase the rigidity of the cushion frame, and on the contrary, it is possible to reduce the strength of the cushion frame by making the board thinner, which reduces the weight of the device. I can figure it out. In addition, in conventional seat slide devices, the lower rail bracket is cantilevered with respect to the mount bracket, making it impossible to increase the distance from the center of the rail to the tightening hole. Since the device has a connecting member that is supported on both sides, it is possible to eliminate the mount bracket by making the shape of the connecting member compatible with the vehicle floor, etc., and it is possible to eliminate the mount bracket, which greatly reduces parts costs by reducing the number of parts. Can be reduced.

[Brief explanation of the drawing]

1 to 3 show one embodiment of the present invention, in which FIG. 1 is an overall oblique 14- perspective view of a vehicle to which a front seat is attached by the seat slide device of the present invention, and FIG. The figure is a perspective view of the seat slide device, FIG. 3 is a front view of the seat slide device, and FIGS. 4 to 7 show conventional examples. FIG. 5 is a perspective view of the seat slide device, FIG. 6 is a side view of the upper rail and lower rail, and FIG. 7 is a perspective view of the seat slide device as seen from the direction of the arrow in FIG. 4. It is a front view. 1...Front seat, 3...Seat cushion,
5... Seat slide device, 6... Vehicle floor, 7... Inner rail, 8
...Outer rail, 9.10...Lock mechanism,
11...Operation lever l2...Cross member,
13... tunnel part, 14, 15, 16.
17...screw hole, 18. 19...lower rail, 2
0. 21... Upper rail, 22... Cushion frame, 23. 24...Mounting bracket, 25, 26, 27. 28...Mounting hole, 29...
- First connecting member, 30... Second connecting member, 31, 32. 33, 34... Long hole, 35... Bolt, 36... Foot, 37... Shaft, 38... Connection wire. Patent applicant Suzuki Motor Co., Ltd. Figure 3 Figure 41 Figure 5 Figure 6 Figure 7 Procedural amendment (voluntary) Indication of the case Pingwei 1st year patent application No. 298821 Name of the invention Seat sliding device Person making the amendment Name related to the incident (208)

Claims (1)

[Claims] Inner rails and outer rails each having a lower rail fixed to the vehicle body side and an upper rail fixed to the seat side and movably attached by fitting to the lower rail are arranged on both left and right sides along the longitudinal direction of the vehicle body, A seat slide device in which the inner rail and the outer rail are each provided with a locking mechanism, and the longitudinal position of the seat is adjusted by unlocking the locking mechanism with an operating lever disposed on one of the locking mechanisms, A seat slide device characterized in that lower rails of the inner rail and the outer rail are connected to each other by a connecting member, and the inner rail and the outer rail are attached to a vehicle body via the connecting member.