JP2004142598A - Slide rail structure for vehicle seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To eliminate looseness between a lower rail and an upper rail in a slide rail structure at low cost without increasing the number of parts and fitting work man-hours. <P>SOLUTION: In a slide rail for a vehicle seat provided with a lower rail 5 and an upper rail 6, at least three rollers 11, 12 are attached on the upper rail 6 at a designated interval. The first roller 11 and the second roller 12 are arranged with shifts in vertical directions to press contact on an inner surface of a bottom wall 5a of the lower rail 5 and an inner surface of a top wall 5c of the lower rail 5 respectively. Looseness in the vertical direction between the lower rail 5 and the upper rail 6 can be surely prevented without providing any looseness preventing rollers by taking such a structure, and a slide rail structure capable of smoothly operating with very little looseness can be provided at low cost. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a slide rail structure for a vehicle seat.
[0002]
[Prior art]
In general, as shown in Patent Document 1, a slide rail structure of a vehicle seat includes an upper rail fixedly disposed on a vehicle body side and an upper fitted to the lower rail so as to be relatively movable and a seat attached to an upper surface thereof. Rails, and the relative movement of the pair of rails achieves the forward and backward movement of the seat.
[0003]
By the way, in such a slide rail structure, in order to realize a smooth slide with a sense of stability and reliability, it is important how to suppress rattling between the rails in the vertical direction and the rail width direction. It is.
[0004]
Various proposals have been made as a technique to meet such a demand.
First, as a technique for preventing backlash in the vertical direction between the respective rails, as shown in Patent Document 1, between each pair of front and rear main rollers abutting on the bottom wall of the lower rail, an elastic ball is applied to the upper wall of the lower rail. There is known an apparatus provided with an elastic roller which comes into contact spontaneously.
[0005]
On the other hand, as a technique for preventing backlash in the width direction between the rails, as shown in Patent Document 2, the upper rail extends substantially perpendicularly to the vertical wall of the lower rail and rotates in a direction substantially parallel to the vertical wall. A plurality of roller mounting members each having a shaft are provided, and a backlash preventing roller mounted on each of the rotating shafts is brought into contact with a vertical wall of the lower rail, so that a relative width direction between the lower rail and the upper rail is reduced. There is known one that restricts movement.
[0006]
[Patent Document 1].
[0007]
JP-A-3-88845.
[0008]
[Patent Document 2].
[0009]
Japanese Patent Application Laid-Open No. 9-188071.
[0010]
[Problems to be solved by the invention]
However, in any of these slide rail structures, since a roller dedicated to backlash removal is provided, the number of parts increases due to the provision of the roller, and a large number of work steps are required for assembling. However, there is a problem that the cost is increased and the weight is increased.
[0011]
Therefore, in the present invention, in a slide rail structure, it is an object of the present invention to realize the backlash between the lower rail and the upper rail at a lower cost without increasing the number of parts or the number of assembly steps. Things.
[0012]
[Means for Solving the Problems]
The present invention employs the following configuration as means for solving such a problem.
[0013]
According to a first aspect of the present invention, there is provided a slide rail for a vehicle seat, comprising a lower rail 5 fixedly disposed on a vehicle body side and an upper rail 6 to which the seat 1 is attached, and slidably supporting the seat 1, 6, at least three rollers 11, 12 are attached at predetermined intervals in the front-rear direction of the upper rail 6, and among the rollers 11, 12, the first roller 11 attaches this to the bottom wall 5 a of the lower rail 5. The second roller 12 is characterized by being displaced in the height direction of the upper rail 6 such that the second roller 12 is pressed against the inner surface of the upper wall 5 c of the lower rail 5.
[0014]
According to the second invention of the present application, in the slide rail structure for a vehicle seat according to the first invention, a pair of the first rollers 11 is provided on a single roller shaft 13 on the left and right sides, and on the bottom wall 5 a of the lower rail 5. Is provided with a bead 5e projecting upward and extending in the longitudinal direction of the lower rail 5, and abutting the side corners of the first rollers 11, 11 to the inclined portions 5f, 5f on both right and left sides of the bead 5e. It is characterized in that it is configured to cause
[0015]
In the third invention of the present application, in the slide rail structure for a vehicle seat according to the first invention, a pair of the first rollers 11 is provided on a single roller shaft 13 on the left and right sides, while the first roller 11 is provided on a bottom wall 5 a of the lower rail 5. Are provided in two rows in the width direction of beads 5e projecting upward and extending in the length direction of the lower rail 5, and the side corners of the first rollers 11, 11 are provided on the inclined portions 5f, 5f of the beads 5e. It is characterized in that the parts are configured to contact each other.
[0016]
According to a fourth invention of the present application, in the slide rail structure for a vehicle seat according to the first invention, a pair of the first rollers 11 is provided on a single roller shaft 13 on the left and right sides, while the first roller 11 is provided on a bottom wall 5 a of the lower rail 5. Are provided in two rows with beads 5e protruding downward and extending in the length direction of the lower rail 5, and the first rollers 11, 11 are fitted into the beads 5e, 5e, respectively, and the beads 5e are tracked. It is characterized by being configured to run as.
[0017]
According to a fifth aspect of the present invention, in the slide rail structure for a vehicle seat according to the first aspect, the first rollers 11 are provided on a single roller shaft 13 as a pair of left and right wheels, and the first rollers 11, 11 A third roller 15 is provided therebetween, and the third roller 15 is fitted into a bead 5 e provided so as to protrude downward from the bottom wall 5 a of the lower rail 5 and extend in the longitudinal direction of the lower rail 5. It is characterized in that it is configured to travel with the bead 5e as a track.
[0018]
【The invention's effect】
According to the slide rail structure for a vehicle seat according to the first invention of the present application, the following effects can be obtained.
[0019]
(A) According to the slide rail structure of the vehicle seat according to the first invention of the present application, the lower rail 5 fixed to the vehicle body and the upper rail 6 to which the seat 1 is attached are slidable. At least three rollers 11 and 12 are attached to the upper rail 6 at predetermined intervals in the front-rear direction of the upper rail 6, and among the rollers 11 and 12, The first roller 11 biases this to the inner surface of the bottom wall 5a of the lower rail 5 and the second roller 12 biases it to the inner surface of the upper wall 5c of the lower rail 5 in the height direction of the upper rail 6 so as to press them. The upper and lower rails between the lower rail 5 and the upper rail 6 can be used without any special backlash removing rollers. Rattling can be and surely prevented in advance, this results in being able to provide a slide structure in which the vertical direction of the backlash to work extremely small smooth lower cost.
[0020]
(A) According to the slide rail structure for a vehicle seat according to the second invention of the present application, the following specific effects can be obtained in addition to the effects described in the above (a). That is, in the present invention, a pair of first rollers 11 is provided on a single roller shaft 13 on the left and right, while a bead 5e protruding upward from the bottom wall 5a of the lower rail 5 and extending in the length direction of the lower rail 5 is provided. Are provided so that the side corners of the first rollers 11, 11 are respectively brought into contact with the inclined portions 5f, 5f on both right and left sides of the bead 5e. Even if no roller is provided, the movement in the width direction is controlled by the cooperation of the first roller 11 and the bead 5e provided to protrude upward from the bottom wall 5a of the lower rail 5, in other words, the number of components is reduced. It is possible to suppress rattling in the width direction as well as in the vertical direction as much as possible without incurring an increase in the number of assembling work, and as a result, provides a slide rail structure with high stability and reliability at low cost. It is kill things.
[0021]
In addition, by providing the beads 5e on the lower rail 5, the rigidity of the lower rails 5 is improved by the beads 5e, and the reliability of the entire slide rail structure is improved by improving the strength performance of the slide rails 4. Will be enhanced.
[0022]
(C) According to the slide rail structure of the vehicle seat according to the third invention of the present application, in the slide rail structure of the vehicle seat according to the first invention, the first roller 11 is connected to a single roller shaft 13. On the bottom wall 5a of the lower rail 5, beads 5e projecting upward and extending in the length direction of the lower rail 5 are provided in two rows in the width direction thereof, and the inclined portions 5f of the beads 5e are provided. 5f, the side corners of each of the first rollers 11, 11 are configured to be in contact with the bottom wall 5a of the lower rail 5 without providing a dedicated roller for restricting the movement in the width direction. By the cooperation of the two rows of beads 5e in the width direction provided on the side and the first rollers 11 whose side corners are in contact with the two rows of beads 5e, the movement in the two directions in the width direction is restricted. Row at the same time That is, in other words, rattling in two directions in the width direction can be suppressed as much as possible in the vertical direction without increasing the number of parts or increasing the number of assembling work steps. A slide rail structure having qualitative and reliable characteristics can be provided at low cost.
[0023]
Further, since the beads 5e are provided in two rows on the lower rail 5, the rigidity of the lower rail 5 is improved by the beads 5e, 5e. The reliability of the entire rail structure is improved.
[0024]
(D) According to the vehicle seat slide rail structure according to the fourth invention of the present application, in the vehicle seat slide rail structure according to the first invention, the first roller 11 is connected to the single roller shaft 13. On the bottom wall 5a of the lower rail 5, beads 5e projecting downward and extending in the longitudinal direction of the lower rail 5 are provided in two rows, and the first rollers 11, 11 5e and 5e, the bottom wall 5a of the lower rail 5 does not need to be provided with a dedicated roller for restricting the movement in the width direction. By the cooperation of the bead 5e provided on the side and the first rollers 11, 11 running on the bead 5e as a track, movement in two directions in the width direction is simultaneously performed. In other words, It is possible to minimize rattling in both the vertical direction and the width direction without increasing the number of parts and the number of assembling work steps, resulting in higher qualitativeness and reliability. The slide rail structure can be provided at a low cost.
[0025]
Further, since the beads 5e are provided in two rows on the lower rail 5, the rigidity of the lower rail 5 is improved by the beads 5e, 5e. The reliability of the entire rail structure is improved.
[0026]
(E) According to the slide rail structure of the vehicle seat according to the fifth invention of the present application, in the slide rail structure of the vehicle seat according to the first invention, the first roller 11 is connected to a single roller shaft 13. And a third roller 15 is provided between the first rollers 11, 11, and the third roller 15 protrudes downward from the bottom wall 5 a of the lower rail 5 and extends in the longitudinal direction of the lower rail 5. The bead 5e provided on the bottom wall 5a side of the lower rail 5 and the bead 5e are fitted into a bead 5e provided to extend to The movement in the two width directions is simultaneously controlled by the cooperation with the third roller 15 running on the track 5e, and the rattling in the two width directions is suppressed as much as possible in the vertical direction. Thus, a stable and reliable slide rail structure can be provided at low cost.
[0027]
In addition, by providing the beads 5e on the lower rail 5, the rigidity of the lower rails 5 is improved by the beads 5e, and the reliability of the entire slide rail structure is improved by improving the strength performance of the slide rails 4. Will be enhanced.
[0028]
Embodiment
Hereinafter, a slide rail structure of a vehicle seat according to the present invention will be specifically described with reference to the accompanying drawings.
[0029]
(A) First Embodiment FIG. 1 shows a slide rail structure according to a first embodiment of the present invention. The slide rail structure includes a lower rail 5 fixed to a vehicle body via a mounting bracket 7 and an upper rail 6 which is mounted to the lower rail 5 so as to be relatively movable in the axial direction (longitudinal direction) thereof. . The seat 1 is fixed to the upper part of the upper rail 6 via a support bracket 8, and the seat 1 is moved in the vehicle longitudinal direction by the relative movement of the upper rail 6 with respect to the lower rail 5. You.
[0030]
As shown in FIGS. 2 and 3, the lower rail 5 is formed of a mold material having a predetermined length, and has a sectional shape having a bottom wall 5a having a predetermined width, and left and right sides of the bottom wall 5a. A pair of left and right side walls 5b, 5b, which stand upward from the edge, and extend horizontally from the upper ends of the pair of left and right side walls 5b, 5h, respectively, toward the inside in the rail width direction. It is substantially C-shaped, having a pair of upper walls 5c, 5c, and a pair of left and right hanging walls 5d, 5d which are continuous with the inner edges in the rail width direction of the respective upper walls 5c, 5c and are downwardly hung therefrom. . An open groove 14 having a predetermined width and extending in the longitudinal direction of the rail is formed inside the pair of left and right hanging walls 5d, 5d in the facing direction. Note that the upper rail 6 described below is inserted through the groove 14.
[0031]
Further, in this embodiment, by applying the present invention, a predetermined range at the center in the width direction of the bottom wall 5a is raised upward (toward the upper wall 5c) to form a bead 5e, and the bead 5e is formed. Both edges of 5e are inclined portions 5f, 5f, respectively.
[0032]
The upper rail 6 includes a main body 6a formed by abutting two plate members, and a pair of right and left vertical members formed by folding the respective plate members outward in a substantially U-shape at the lower end side of the main body portion 6a. The main body 6a and the vertical walls 6b, 6b have a substantially anchor-shaped cross section.
[0033]
The upper rail 6 constitutes the slide rail 1 together with the lower rail 5 by being inserted into the lower rail 5 so as to be relatively movable. In this case, the relative movement between the rails 5 and 6 is smooth. In order to secure stability and reliability by performing the following steps, at least three or more of the first roller 11 and the second roller 12 described below are provided on the upper rail 5 side in a longitudinal direction of the upper rail 6. It is attached at predetermined intervals in the direction. The first roller 11 and the second roller 12 have the same shape and size, and are both supported by a roller shaft 13 whose axial direction is set in the width direction of the upper rail 6.
[0034]
In this case, in this embodiment, as shown in FIG. 1, the first roller 11 and the second roller 12 are attached alternately at a predetermined interval in the longitudinal direction of the upper rail 6, In the direction, the first roller 11 is displaced vertically so that the second roller 12 is located lower and the second roller 12 is located higher. Due to such a vertically displaced arrangement of the first roller 11 and the second roller 12, the first roller 11 comes into contact with the bottom wall 5a of the lower rail 5 as shown in FIG. Are separated. As shown in FIG. 3, the second roller 12 abuts on the upper wall 5c of the lower rail 5, and is separated from the bottom wall 5a.
[0035]
Thus, the first roller 11 contacts the bottom wall 5a of the lower rail 5, the second roller 12 contacts the upper wall 5c of the lower rail 5, and these two types of rollers 5, 6 The upper rail 6 is vertically coupled to the lower rail 5 by being provided in the longitudinal direction of the lower rail 5 as appropriate, and the rattling of the upper rail 6 between them is prevented as much as possible. Will be done.
[0036]
On the other hand, as shown in FIG. 2, each of the pair of left and right first rollers 11, 11 abutting against the bottom wall 5 a of the lower rail 5 has inner side corners provided on the bottom wall 5 a of the lower rail 5. The interval dimension is set so that the bead 5e is engaged with the inclined portions 5f, 5f on both left and right sides from the outside in the rail width direction. Therefore, the bead 5e provided on the bottom wall 5a of the lower rail 5 is sandwiched between the pair of first rollers 11, 11 from both sides in the rail width direction. As a result, the lower rail 5 and the upper rail 6 Rattling in the rail width direction between them is prevented as much as possible.
[0037]
As described above, according to the slide rail structure of this embodiment, at least three rollers 11, 12 are attached to the upper rail 6 at a predetermined interval in the front-rear direction of the upper rail 6, and the respective rollers 11, 12 12, the first roller 11 presses the inner rail on the inner surface of the bottom wall 5 a of the lower rail 5, and the second roller 12 presses the inner roller on the inner surface of the upper wall 5 c of the lower rail 5. By arranging the lower rails 5 in the height direction, it is possible to prevent rattling in the vertical direction between the lower rails 5 and the upper rails 6 in advance, and at the same time, to the bottom wall 5 a of the lower rails 5. The bead 5e is provided and the side corners of the first rollers 11, 11 are respectively brought into contact with the inclined portions 5f, 5f on both right and left sides of the bead 5e. Areru 5 and can and surely prevent rattling of the rail width direction in advance between the upper rail 6, as these synergistic effects, but that can be inexpensively provided stability and reliable slide structure.
[0038]
In addition, since the lower rail 5 is provided with the beads 5e, the rigidity of the lower rail 5 is improved by the beads 5e, and the reliability of the slide rail structure itself is improved by improving the strength performance of the slide rail 4. Is further enhanced.
[0039]
(B) Second Embodiment FIG. 4 shows a main part of a slide rail structure according to a second embodiment of the present invention. The slide rail structure according to this embodiment has the same basic structure as the slide rail structure according to the first embodiment, except for the structure of the bottom wall 5 a of the lower rail 5.
[0040]
That is, in this embodiment, when the beads 5e are provided on the bottom wall 5a of the lower rail 5, they are formed in two rows at a predetermined interval in the rail width direction, and the two beads 5e, 5e are arranged in the rail width direction. The inner side corners of the pair of left and right first rollers 11, 11 are engaged with the outer inclined portions 5f, 5f from the outside in the rail width direction, respectively, whereby the lower rail 5 and the upper rail 6 are connected to each other. The rattling in the rail width direction between them is suppressed as much as possible.
[0041]
Further, since the beads 5e are provided in two rows on the bottom wall 5a of the lower rail 5 as described above, the beads 5e are formed as compared with the case of the first embodiment in which the beads 5e are arranged in one row. The effect of improving the rigidity of the lower rail 5 is further enhanced, and furthermore, the stability and reliability of the slide rail structure can be expected to be further improved.
[0042]
Since the structure of the other parts and the operation and effect based on them are all the same as those of the first embodiment, the description thereof will be omitted by using the corresponding description.
[0043]
(C) Third Embodiment FIG. 5 shows a main part of a slide rail structure according to a third embodiment of the present invention. The slide rail structure according to this embodiment has the same basic structure as the slide rail structure according to the first embodiment, except for the structure of the bottom wall 5a of the lower rail 5 and the first rail. This is the structure of the roller 11.
[0044]
That is, in this embodiment, when a bead 5e is provided on the bottom wall 5a of the lower rail 5, the bead 5e is shaped to protrude downwardly from the bottom wall 5a in a semicircular arc, and the bead 5e is The bottom wall 5a is arranged in two rows at a predetermined interval in the rail width direction.
[0045]
On the other hand, in the first roller 11, the outer peripheral surface of the first roller 11 is flat in the first embodiment, whereas the outer peripheral surface of the first roller 11 is semi-circular in this embodiment. And the surface.
[0046]
When the upper rail 6 is attached to the lower rail 5, the pair of left and right first rollers on the upper rail 6 side are placed in the two rows of beads 5e on the bottom wall 5a side of the lower rail 5. 11 and 11 are fitted and run along the beads 5e, 5e as tracks.
[0047]
With such a configuration, each of the first rollers 11, 11 engages with the inclined portions 5f, 5f of each of the beads 5e, 5e in the rail width direction, so that a gap between the lower rail 5 and the upper rail 6 is formed. The rattling in the rail width direction is suppressed as much as possible.
[0048]
Further, since the beads 5e are provided in two rows on the bottom wall 5a of the lower rail 5 as described above, the beads 5e are formed as compared with the case of the first embodiment in which the beads 5e are arranged in one row. The effect of improving the rigidity of the lower rail 5 is further enhanced, and furthermore, the stability and reliability of the slide rail structure can be expected to be further improved.
[0049]
Since the structure of the other parts and the operation and effect based on them are all the same as those of the first embodiment, the description thereof will be omitted by using the corresponding description.
[0050]
(D) Fourth Embodiment FIG. 6 shows a main part of a slide rail structure according to a fourth embodiment of the present invention. The slide rail structure of this embodiment has both the features of the slide rail structure according to the first embodiment and the features of the slide rail structure according to the third embodiment.
[0051]
That is, in the slide rail structure of this embodiment, a bead 5e having a semicircular cross section is provided at the center of the bottom wall 5a of the lower rail 5 in the rail width direction and projects downward, while the roller shaft is provided on the upper rail 6 side. A first roller 11 having a flat outer peripheral surface is attached to each end of the roller 13, and a third roller 15 having a semicircular outer peripheral surface is further attached to the axial center of the roller shaft 13. I have.
[0052]
When the upper rail 6 is attached to the lower rail 5, the left and right first rollers 11, 11 abut on the flat surface of the bottom wall 5 a of the upper rail 6, and A roller 15 is fitted on the bead 5e and can travel on the bead 5e.
[0053]
Therefore, in the slide rail structure of this embodiment, the rattling in the vertical direction between the lower rail 5 and the upper rail 6 is mainly caused by the first rollers 11, 11 contacting the flat surface of the bottom wall 5a. The rattling in the rail width direction is realized by the third roller 15 engaging with the inclined portion 5f of the bead 5e in the rail width direction. That is, the rattling suppressing action in the vertical direction between the rails 5 and 6 and the rattling suppressing action in the rail width direction are shared between the first roller 11 side and the third roller 15 side. As a result, the reliability of rattling prevention is improved.
[0054]
Further, by providing the bead 5e on the bottom wall 5a of the lower rail 5, the effect of forming the bead 5e to improve the rigidity of the lower rail 5 is further enhanced, and thus the stability and reliability of the slide rail structure are extended. A further improvement in sex can be expected.
[0055]
Since the structure of the other parts and the operation and effect based on them are all the same as those of the first embodiment, the description thereof will be omitted by using the corresponding description.
[0056]
(E) Fifth Embodiment FIG. 7 shows a main part of a slide rail structure according to a fifth embodiment of the present invention. The slide rail structure of this embodiment is different from the above embodiments in that the upper rail 6 has a substantially inverted T-shaped configuration, whereas the upper rail 6 has a substantially C-shaped configuration. Therefore, the same operation and effect as those of the above embodiments can be obtained.
[0057]
(F) In each of the above embodiments, the shape of the outer peripheral surface of the first roller 11 is a flat surface or an arc surface in accordance with the shape of the bottom wall 5a of the lower rail 5 with which the first roller 11 contacts. However, the present invention is not limited to such a configuration. Regardless of the shape of the bottom wall 5a of the lower rail 5, the shape of the outer peripheral surface of the first roller 11 may be either a flat surface or an arc surface. Things.
[Brief description of the drawings]
FIG. 1 is a side view of a slide rail structure according to a first embodiment of the present invention.
FIG. 2 is an enlarged sectional view taken along line AA of FIG.
FIG. 3 is an enlarged sectional view taken along line BB of FIG. 1;
FIG. 4 is a sectional view of a main part of a slide rail structure according to a second embodiment of the present invention.
FIG. 5 is a sectional view of a main part of a slide rail structure according to a third embodiment of the present invention.
FIG. 6 is a sectional view of a main part of a slide rail structure according to a fourth embodiment of the present invention.
FIG. 7 is a sectional view of a main part of a slide rail structure according to a fifth embodiment of the present invention.
[Explanation of symbols]
1 is a seat, 2 is a seat cushion, 3 is a seat back, 4 is a slide rail, 5 is a lower rail, 6 is an upper rail, 7 is a mounting bracket, 8 is a support bracket, 11 is a first roller, 12 is a second roller, 13 is a roller shaft, 14 is an open groove, and 15 is a third roller.

Claims (5)

A slide rail for a vehicle seat, comprising a lower rail (5) fixedly disposed on the vehicle body side and an upper rail (6) to which the seat (1) is attached, which slidably supports the seat (1).
At least three rollers (11) and (12) are attached to the upper rail (6) at predetermined intervals in the front-rear direction of the upper rail (6), and among the rollers (11) and (12), The first roller (11) is pressed against the inner surface of the bottom wall (5a) of the lower rail (5), and the second roller (12) is pressed against the inner surface of the upper wall (5c) of the lower rail (5). A slide rail structure for a vehicle seat, wherein the slide rail structure is arranged so as to be displaced in the height direction of the upper rail (6). In claim 1,
While the first roller (11) is provided as a pair of right and left on a single roller shaft (13),
The bottom wall (5a) of the lower rail (5) is provided with a bead (5e) projecting upward and extending in the longitudinal direction of the lower rail (5). A slide rail structure for a vehicle seat, wherein the side corners of the first rollers (11) and (11) abut against 5f) and (5f), respectively. In claim 1,
While the first roller (11) is provided as a pair of right and left on a single roller shaft (13),
On the bottom wall (5a) of the lower rail (5), beads (5e) projecting upward and extending in the length direction of the lower rail (5) are provided in two rows in the width direction thereof. ), The side corners of the first rollers (11) and (11) abut against the inclined portions (5f) and (5f), respectively. In claim 1,
While the first roller (11) is provided as a pair of right and left on a single roller shaft (13),
On the bottom wall (5a) of the lower rail (5), beads (5e) projecting downward and extending in the length direction of the lower rail (5) are provided in two rows, and the first rollers (11), A slide rail structure for a vehicle seat, wherein (11) is configured to fit into each of the beads (5e) and (5e) and to run on the bead (5e) as a track. In claim 1,
The first roller (11) is provided on a single roller shaft (13) as a pair of left and right,
A third roller (15) is provided between the first rollers (11) and (11), and the third roller (15) projects downward from a bottom wall (5a) of the lower rail (5) and A vehicle seat characterized in that it is fitted in a bead (5e) provided so as to extend in the length direction of the lower rail (5) and travels on the bead (5e) as a track. Slide rail structure.

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