JP4172152B2 - Seat slide device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a seat slide device. More specifically, the present invention relates to a lower rail that is attached along the front-rear direction of the vehicle floor surface, and is guided and supported so as to be slidable in the longitudinal direction on the lower rail, and on the seat body side. The present invention relates to a seat slide device including an upper rail that is fixedly mounted.
[0002]
[Prior art]
2. Description of the Related Art Generally, a vehicle seat includes a seat body including a seat cushion and a seat back or the like standing upright so as to freely rotate, and the seat cushion and the like constituting the seat body are mounted on a vehicle body floor surface. By being supported via a front / rear slide mechanism, it is configured so that the slide movement can be adjusted in the front / rear direction of the vehicle body, and the seat layout in the vehicle compartment can be changed variously.
[0003]
As such a seat front / rear slide mechanism, a lower rail and a seat body which are formed long in the front-rear direction on the vehicle body floor side, are placed on the vehicle body floor surface side, and are provided at substantially the same height as the surface of the floor carpet. A seat slide device composed of an upper rail attached and fixed to the side is used.
[0004]
As shown in FIGS. 8 and 9, in the conventional normal seat slide device 1, the pair of left and right lower rails 2 are formed of a metal plate material and have a main body portion 2a having a substantially upward U-shape, and both side portions 2b of the main body portion 2a. A pair of left and right engaging portions 3 that are refracted inward from the distal end side and hang downward from the distal end side are provided, and an opening 3 a is formed at the end of the engaging portion 3.
[0005]
The pair of left and right upper rails 5 of the seat slide device 1 is formed in a substantially inverted T shape so as to be assembled to the lower rail 2, and is formed on both side portions refracted upward from the front end side of the horizontal portion of the upper rail 5. A locked portion is formed. This locked portion is combined so as to be engageable with the locking portion 3 on the lower rail 2 side.
[0006]
Further, a substantially inverted T-shaped vertical portion 5a of the upper rail 5 projects upward from the opening 3a of the lower rail 2, and an anchor member, a shaft of a seat lifter, a base of a reclining mechanism, and the like are attached. A roller 7 is inserted between the lower rail 2 and the upper rail 5 while being supported by a roller shaft 7a.
[0007]
In this way, when the roller 7 is interposed between the lower rail 2 and the upper rail 5 so as to be slidably supported, the slide function is obtained in comparison with a conventional slide function obtained by sliding between simple metal surfaces. It is possible to prevent problems such as sudden increase or decrease in resistance or malfunction due to abnormal noise or fluctuation of sliding resistance due to load during operation.
[0008]
[Problems to be solved by the invention]
However, when the conventional seat slide device 1 as described above is formed long, the processing of each part is complicated, and there is also a problem of backlash due to the dimensional error of each part, and the dimensional variation of each part of the vehicle and the seat. As shown in FIG. 6, when the roller 7 between the lower rail 2 and the upper rail 5 is tilted, the sliding operation force is increased and the upper rail 5 is smoothly slid. There is a risk that problems such as the inability to obtain will occur.
[0009]
In addition, if the clearance is set large in order to prevent an increase in sliding resistance, there is a risk that rattling will occur, and it is possible to select and fit rollers and sliders of different sizes depending on the dimensional variation of each slide part. Necessary, the number of parts increases, and there is a drawback that parts management becomes complicated.
[0010]
The object of the present invention is to absorb the dimensional variation of each part of the vehicle and the seat, yet the structure is simple, no increase in the number of new parts or attachment work is required, and the cost is low. It is an object of the present invention to provide a seat slide device that can perform work easily and quickly, can obtain a smooth and stable sliding operation, can reduce sliding resistance, and can improve operability.
[0011]
[Means for Solving the Problems]
The present invention has been made in view of the above-described problems. A seat slide device according to a first aspect of the present invention includes a lower rail attached along a front-rear direction of a vehicle floor surface, and a slide in a longitudinal direction on the lower rail. In the seat slide device comprising an upper rail that is supported and movably supported and fixed to the seat body side,
The lower rail includes a main body portion having a substantially upward U-shape, and a pair of left and right flanges extending inwardly from the front end sides of both side portions of the main body portion to form openings, on both sides of the bottom portion of the main body portion Is formed with a pair of left and right roller receiving stepped portions inclined downward toward the center ,
The upper rail protrudes upward from the center of the upper wall of the lower rail and the upper portion of the upper wall of the lower rail, and protrudes upward from the openings on both sides of the lower rail. , has a vertical wall forming the mounting portion of the seat main body, a pair of left and right rollers between the upper wall of the body portion of the pair of rollers receiving step portion and the upper rails provided on the main body portion of the lower rail is The pair of left and right rollers inserted are pivotally supported by roller shafts attached to both sides of the main body of the upper rail, and a coil spring is inserted between the pair of left and right rollers so that the shafts of the two rollers spring property along the direction is applied, and the sliding portions of the left and right of the roller toward the center of each side of the bottom of the body portion of the lower rail downward slanted pair of rollers receiving step portion Characterized in that in contact with the concentric arc against.
[0012]
According to the seat slide device of the first aspect of the present invention, the roller pivotally supported by the roller shaft has a left and right divided structure, and the pair of left and right rollers are separated from each other by the coil spring. Because it is energized, it is possible to absorb the variation in the vehicle body mounting part and the variation between the lower rail and the upper rail by the elastic action along the axial direction of the left and right rollers, and unreasonable input to the seat slide device If there is, the roller is elastically deformed, and the sliding part of the roller is concentric with the pair of left and right roller receiving steps that are inclined downward toward the center of both sides of the bottom part of the lower rail body. Even if the upper rail tilts or slides sideways, smooth sliding operation is possible without increasing sliding resistance. Becomes, the peeling load can exert temporarily peeling prevention function when working.
[0013]
In the seat slide device according to claim 2 of the present invention, the pair of left and right rollers pivotally supported by the roller shaft is provided with a spring accommodating recess on each inner peripheral surface, and the spring is accommodated inside the roller. The gap dimension between the left and right rollers can be measured through the opening on the lower surface of the lower rail.
[0014]
According to the seat slide device according to claim 2 of the present invention, it is possible to measure the gap dimension of the pair of left and right rollers from the opening on the lower surface of the lower rail with a thickness gauge or the like, and even when variations cannot be absorbed. It can respond effectively.
[0015]
In the seat slide device according to claim 3 of the present invention, a slider receiving portion is formed on the inner surface side of the flange of the lower rail, and a slider receiving portion is formed on the shoulder portion of the upper wall of the upper rail main body portion, A slider that is elastically deformable in a radial direction by a V-groove slit is inserted between the slider receiving portion of the lower rail and the slider receiving portion of the upper rail.
[0016]
According to the seat slide device of the third aspect of the present invention, the slider receiving portions are formed on the flange inner surface of the lower rail and the upper side of the upper rail, respectively, and the V-shaped slits are provided between the slider receiving portions in the radial direction. since the elastically deformable slider is inserted, the slider, when there is excessive input, the slider is elastically deformed, can be the upper rail to absorb the input by tilting.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of a seat slide device according to the present invention will be described in detail with reference to the drawings.
1 to 4 show a first embodiment of the present invention. FIG. 1 is a cross-sectional view showing a main part of a seat slide device according to the present invention. FIG. 2 is an exploded view showing a configuration of an upper rail in the seat slide device. FIG. 3 and FIG. 4 are sectional views showing a state where the upper rail in the seat slide device is inclined and a state where it is slid in the lateral direction. FIGS. 5 to 7 show a second embodiment of the present invention. FIG. 5 is a cross-sectional view showing the main part of the seat slide device. FIGS. 6 and 7 show the state in which the upper rail is inclined and moves sideways. It is sectional drawing which shows the state which carried out, respectively.
[0018]
First, the object to which the seat slide device according to the present invention is attached is not shown, but is interposed between the seat body constituted by a seat cushion, a seat back, etc. on the vehicle floor and the vehicle floor. As is well known, the seat body is used to be slidably supported along the longitudinal direction of the vehicle.
[0019]
As shown in FIGS. 1 and 2, a seat slide device 10 according to the present invention is mounted on a floor surface of a vehicle along the longitudinal direction of the vehicle, and is accommodated in the lower rail 20 so as to extend the length of the vehicle. The upper rail 30 that is slidable in the direction and that is attached to the side of the seat body (not shown) and supports the seat body is generally configured.
[0020]
More specifically, the lower rail 20 and the upper rail 30 are formed of an extruded product of a light alloy such as an aluminum die cast or a magnesium alloy. However, an extruded product of a hard synthetic resin may be used. It may be fixed to the vehicle floor surface in a state where it is embedded in the notch portion of the floor carpet, or may be attached on the vehicle floor surface by providing a leg.
[0021]
The lower rail 20 is formed with a body portion 21 having a substantially upward U-shape, and a pair of left and right flanges 22 that are refracted inwardly from the upper ends of both side portions of the body portion 21 and have an opening portion 21a. the bottom sides of the main body portion 21, a pair of left and right rollers receiving recessed portion 23 for receiving a pair of rollers to be described later is provided on the downstream inclined towards the center, the shoulder inner surface of the lower rail 20, receives the slider A slider receiving portion 24 is formed.
[0022]
On the other hand, the upper rail 30 has a body portion 31 that has a substantially downward U shape so as to be accommodated in the body portion 21 of the lower rail 20, and slider receiving portions 32 formed on both shoulder portions of the body portion 31, A vertical wall 33 projects upward from the center of the upper wall 31 a of the main body 31 and projects upward from the opening 21 a of the lower rail 20.
[0023]
Next, in order to smoothly slide the upper rail 30 along the longitudinal direction of the lower rail 20, in the seat slide device 10 according to the present invention, the rollers 40 a and 40 b having a left and right divided configuration are the main body portions of the upper rail 30. The rollers 40a and 40b are pivotally supported by a roller shaft 41 attached to the main body 31 of the upper rail 30 so as to be rotatable.
[0024]
The pair of left and right rollers 40a and 40b accommodate the coil spring 42 on the inner peripheral surface of each roller 40a and 40b in order to accommodate the coil spring 42 inserted in the outer peripheral surface of the roller shaft 41 therein. Since the concave portions 42a and 42b are provided, the rollers 40a and 40b are given an elastic action along the axial direction.
[0025]
Further, the pair of left and right rollers 40a and 40b are in contact with the sliding portions 43a and 43b against the roller receiving step portion 23 of the lower rail 20, and the contact surface has an angle indicated by θ in FIG. The left and right contact surfaces are set in a concentric arc shape while being in contact with each other at an angle of inclination.
[0026]
In addition, an opening 31b is formed on the upper side of the rollers 40a and 40b in order to avoid interference with the inner surface of the shoulder portion of the main body 31 in the upper rail 30.
[0027]
Next, sliders 44a and 44b are provided closer to the terminal side than the positions where the rollers 40a and 40b are installed. The sliders 44a and 44b are respectively provided with the slider receiving portion 24 of the lower rail 20 and the slider receiving portion of the upper rail 30. 32, V-shaped slits 45a and 45b are formed, and a synthetic resin molded body that is elastically deformable in the radial direction is formed, and locking claws 46a and 46b are attached to the main body 31 of the upper rail 30. It is fixed by locking. The outer periphery of the lower rail 20 is encapsulated by a lower rail finisher 25 and a finisher bracket 26.
[0028]
As shown in FIG. 2, the upper rail 30 has a pair of left and right rollers 40a and 40b pivotally supported by the roller shaft 41 as described above at both ends in the longitudinal direction, and more terminal than the rollers 40a and 40b. Sliders 44a and 44b are attached to the side, but both end portions in the longitudinal direction of the upper rail 30 are attached to the seat body side (not shown) so that the leg bracket 34 is secured to the vertical wall of the upper rail 30 by bolts 34a and weld nuts 34b. The leg bracket 34 is fixed to a seat body (not shown) by a stud bolt 34c.
[0029]
The locking mechanism between the lower rail 20 and the upper rail 30 will be described with reference to FIG. 2. A shaft lock 51 is connected to the operation lever 50 via a bush 52, and an operation piece 51 a of the shaft lock 51 is connected to a rivet lock 53. The wave washer 55 and the E ring 56 are respectively attached to the rivet lock 53 on the back surface of the latch 54. Further, a spring 57 that biases in the locking direction is attached to the operation lever 50. Reference numeral 50a denotes a nut for fixing the operation lever 50.
[0030]
Then, the latch 54 is moved forward and backward by the operation lever 50, and the latch pawl 54a engages with a latch hole (not shown) of the lower rail 20, whereby the upper rail 30 is locked to the lower rail 20 at a predetermined slide position. .
[0031]
Therefore, according to the seat slide device 10 according to the present invention, the pair of left and right rollers 40a and 40b pivotally supported by the roller shaft 41 are urged outward by the coil spring 42, and the rollers 40a and 40b are Since the elasticity along the direction is given and a gap (shown by d in FIG. 1) between the left and right rollers 40a and 40b is set, the variation in the vehicle body mounting portion and the lower rail 20 and the upper Variations with the rail 30 can be absorbed.
[0032]
In particular, since the coil spring 42 that biases the rollers 40a and 40b outward as in the present embodiment is housed inside the rollers 40a and 40b, the thickness gauge is provided through the opening 21b provided in the lower portion of the main body 21 of the lower rail 20. The gap d between the rollers 40a and 40b can be measured by the above, quality control can be easily performed, and even when variation cannot be absorbed by measuring the gap d between the rollers 40a and 40b, etc. There is an advantage that quality control can be easily performed.
[0033]
Furthermore, according to the seat slide device 10 according to the present invention, the sliding portions 43a and 43b of the pair of left and right rollers 40a and 40b abut on the pair of left and right roller receiving steps 23 of the lower rail 20 in a concentric arc shape. Therefore, the dimensional variation of the slide parts can be absorbed, and the selective fitting can be eliminated.
[0034]
In addition, the space between the sliding portions 43a and 43b of the pair of left and right rollers 40a and 40b and the roller receiving step portion 23 on the lower rail 20 side is set to a gentle slope of about 23 °, and the friction between the two Since the coefficient is extremely small, there is almost no deflection of the rollers 40a and 40b, and there is no play or abnormal noise (lower sound).
[0035]
Next, when the upper rail 30 in the seat slide device 10 according to the present invention is inclined in the direction of the arrow with respect to the center line P, as shown in FIG. 3, when the vertical wall 33 of the upper rail 30 is inclined, the rollers 40a, 40b The sliding portions 43a and 43b are inclined along the arc surface with the roller receiving step portion 23 of the lower rail 20.
[0036]
Then, although the surface pressure between the rollers 40a, 40b and the lower rail 20 and the surface pressure between the sliders 44a, 44b and the slider receiving portion 32 of the upper rail 30 are increased and the sliding resistance is increased, the rollers 40a, 40b are increased. Further, the increase in the surface pressure can be prevented by the elastic action of the sliders 44a and 44b. By preventing the sliding resistance from increasing, the seat slide device 10 can be smoothly moved even when the upper rail 20 is inclined. A sliding operation can be expected.
[0037]
Further, if a clearance is set between the pair of left and right rollers 40a and 40b and the main body 31 of the upper rail 30, when the upper rail 30 moves in the direction of the arrow, as shown in FIG. Due to the clearance set between 40b and the main body 31 of the upper rail 30, the ground contact surfaces of the rollers 40a, 40b and the roller receiving step 23 of the lower rail 20 do not change, and only the upper rail 30 moves laterally. The rollers 40a and 40b do not move.
[0038]
Then, due to the elastic action of the pair of left and right rollers 40a and 40b and the sliders 44a and 44b, the surface pressure between the rollers 40a and 40b and the lower rail and the surface pressure between the sliders 44a and 44b and the grounding surface of the upper rail 30 are reduced. By suppressing it, it becomes possible to prevent an increase in sliding resistance. Therefore, even if the upper rail 30 moves in the lateral direction, a smooth sliding operation can be expected.
[0039]
Next, FIG. 5 shows another embodiment of the seat slide device 10 according to the present invention. The same reference numerals are given to the same portions as those of the above-described embodiment, and the detailed description thereof is omitted. According to this embodiment, the coil spring 42 that biases the rollers 40a, 40b is accommodated in the accommodating recesses 42a, 42b formed on the outer peripheral surfaces of the pair of left and right rollers 40a, 40b.
[0040]
Therefore, although the gap between the pair of left and right rollers 40a and 40b cannot be measured, the elasticity of the rollers 40a and 40b is given by the spring property of the coil spring 42, so that variations in the vehicle body mounting portion and slide parts are effective. As shown in FIG. 6, the rollers 40 a and 40 b and the roller receiving step 23 of the lower rail 20 are set to be concentric arc-shaped contact surfaces even when the upper rail 30 is input in an inclined shape. In addition, a smooth slide operation can be expected without rattling due to the elastic action of the rollers 40a and 40b and the sliders 44a and 44b. Similarly, as shown in FIG. 7, even if the upper rail 30 moves in the lateral direction, a smooth sliding operation can be expected as described above.
[0041]
Note that the present invention is not limited to the structure of the above-described embodiment, and the shape and structure of each part of the seat slide device 10 can be freely modified and changed as necessary. Various modifications including shapes and materials are included in the scope of the present invention.
[0042]
【The invention's effect】
The above is the embodiment of the seat slide device according to the present invention. According to the seat slide device according to claim 1 of the present invention, the roller pivotally supported by the roller shaft has a left and right divided structure. Since the pair of left and right rollers are biased away from each other by the coil spring, the variation in the vehicle body mounting portion and the variation between the lower rail and the upper rail are caused by the elastic action along the axial direction of the left and right rollers. If there is an excessive input to the seat slide device, the pair of left and right rollers will be elastically deformed, and the sliding parts of the pair of left and right rollers will be centered on both sides of the bottom of the lower rail body. since the concentric arc contact against downward slanting pair of rollers receiving step portion toward the, upper rail inclination, or horizontal Even if it is slid in the direction, smooth sliding operation is possible without increasing the sliding resistance, and when the peeling load is applied, the peeling prevention function can be temporarily exhibited. Since only the interpolation is required, the structure is simple, an increase in the number of new parts and an additional work are unnecessary, and the mounting work can be performed easily and quickly.
[0043]
Furthermore, according to the seat slide device of the invention described in claim 2 of the present invention, it is possible to measure the gap between the pair of left and right rollers from the opening on the lower surface of the lower rail with a thickness gauge or the like, and the variation cannot be absorbed. In addition, the quality control can be easily performed.
[0044]
According to the seat slide device of the third aspect of the present invention, the slider receiving portions are respectively formed on the flange inner surface of the lower rail and the upper side of the upper rail, and the slider is inserted between the slider receiving portions. Since the slider is accommodated in the radial direction by the V-groove slit so that it can be elastically deformed, when there is an unreasonable input, the slider is elastically deformed and the upper rail is inclined to absorb this input. Thus, the sliding operation of the sliding device can be smoothly performed without increasing the sliding resistance.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an essential part showing a first embodiment of a seat slide device according to the present invention.
2 is an exploded perspective view showing a configuration of an upper rail in the seat slide device shown in FIG. 1. FIG.
3 is a cross-sectional view showing a state in which an upper rail in the seat slide device shown in FIG. 1 is inclined.
4 is a cross-sectional view showing a state in which an upper rail in the seat slide device shown in FIG. 1 has moved sideways.
FIG. 5 is a cross-sectional view of an essential part showing a second embodiment of a seat slide device according to the present invention.
6 is a cross-sectional view showing a state in which an upper rail in the seat slide device shown in FIG. 5 is inclined.
7 is a cross-sectional view showing a state in which an upper rail in the seat slide device shown in FIG. 5 has moved sideways.
FIG. 8 is a schematic sectional view of a conventional seat slide device.
FIG. 9 is a schematic cross-sectional view showing an inclined state of a roller of a conventional sheet slide device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Seat slide apparatus 20 Lower rail 21 Main body part 22 Flange 23 Roller receiving step part 24 Slider receiving part 30 Upper rail 31 Main body part 32 Slider receiving part 33 Vertical wall 40a Roller 40b Roller 41 Roller shaft 42 Coil spring 43a Sliding part 43b Sliding Moving part 44a Slider 44b Slider 45a V-groove slit 45b V-groove slit 50 Operation lever 54 Latch

Claims (3)

In a seat slide device comprising a lower rail mounted along the front-rear direction of the vehicle floor, and an upper rail that is supported and slidable in the longitudinal direction on the lower rail, and is mounted and fixed on the seat body side,
The lower rail includes a main body portion having a substantially upward U-shape, and a pair of left and right flanges extending inwardly from the front end sides of both side portions of the main body portion to form openings, on both sides of the bottom portion of the main body portion Is formed with a pair of left and right roller receiving stepped portions inclined downward toward the center ,
The upper rail protrudes upward from the center of the upper wall of the lower rail and the upper portion of the upper wall of the lower rail, and protrudes upward from the openings on both sides of the lower rail. , has a vertical wall forming the mounting portion of the seat main body, a pair of left and right rollers between the upper wall of the body portion of the pair of rollers receiving step portion and the upper rails provided on the main body portion of the lower rail is The pair of left and right rollers inserted are pivotally supported by roller shafts attached to both sides of the main body of the upper rail, and a coil spring is inserted between the pair of left and right rollers so that the shafts of the two rollers spring property along the direction is applied, and the sliding portions of the left and right of the roller toward the center of each side of the bottom of the body portion of the lower rail downward slanted pair of rollers receiving step portion Seat slide apparatus characterized by being in contact with the concentric arc against.   The pair of left and right rollers pivotally supported by the roller shaft is provided with a spring accommodating recess on each inner peripheral surface, and the spring is accommodated inside the roller to measure the gap dimension between the left and right rollers through the opening on the lower surface of the lower rail. The seat slide device according to claim 1, wherein the seat slide device is made possible. A slider receiving portion is formed on the inner surface side of the flange of the lower rail, and a slider receiving portion is formed on a shoulder portion of the upper wall of the upper rail main body portion, and the slider receiving portion of the lower rail and the slider receiving portion of the upper rail, The seat slide device according to claim 1, wherein a slider that is elastically deformable in a radial direction is inserted between the two by a V-groove slit .

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