JP2018090053A - Slide rail support structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress rattling of a vehicle seat S with a novel configuration.SOLUTION: A slide rail support structure for a slide rail comprising a lower rail 10 which is fixed to a floor of a vehicle and an upper rail 20 which is supported at a seat side, which supports the upper rail so as to be slidable in a lengthwise direction with respect the lower rail. The support structure has a roller 30 which is annexed to the upper rail, is inserted into the lower rail, and guides the upper rail while rolling an inner surface thereof. Raceway surfaces 12, 14 of the lower rail of the roller are groove-like, and the roller rolls on the groove-like raceway surfaces. Since a rolling surface of the roller is fitted to the raceway surfaces because of the groove-like raceway surfaces, the roller is hard to rattle. Consequently, rattling difficulty is exhibited not only during sliding, but also during resting, thereby suppressing movement of a seat in association with vibration of the vehicle. Further, because of rolling of the roller in a groove, the rolling becomes surface contact and line contact, and is therefore stabilized, and also control force is reduced compared with a conventional planar rolling.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a slide rail support structure applied to a seat slide device for an automobile and the like, and a slide rail support device having the structure.

  In an automatic passenger car, in particular, a minivan, a device that slides (moves) the second-row and third-row seats (seats) forward and backward is usually employed. The slide device will be described with reference to FIGS. 1, 2 and 11 showing an embodiment of the invention according to the present application. A pair of left and right upper rails 20 slidable along the length direction of both lower rails 10, and a roller 30 attached to both upper rails 20 and inserted into the lower rail 10 to guide (guide) the slide of the upper rails 20 The seat S is slidable in the longitudinal direction of the vehicle.

The slide device is difficult to use with high accuracy for the lower rail 10 due to cost restrictions and the like, and the distance between the pair of lower rails 10 is widened or narrowed in the middle, and the parallelism is not accurately obtained. There is a case. In particular, when the moving distance of the sheet S is increased as in a minivan or the like, it is difficult to ensure parallelism.
When the parallelism of the lower rails 10 on both sides is not obtained, the play (gap) between the outer ring of the roller 30 and the inner surface of the lower rail 10 is generated with the movement of the sheet S, and the outer ring of the rotating roller 30 is In some cases, the sheet S cannot be smoothly moved due to being strongly pressed against the inner surface. Further, when the sheet S is moved, the sheet S may be inclined with respect to the rail 10. In this case, in the lower rails 10 on both sides, the roller 30 is in a one-sided state with respect to the lower rail 10, and the sheet S The smoothness of movement is further hindered.

  In order to eliminate such rattling, conventionally, the shape of the lower rail 10 is devised to reduce the gap, or a resin sliding member is attached to the upper rail 20 (Patent Document 1, Paragraph 0016, FIGS. 4 to 7, etc.) An attempt has been made to suppress the rattling by filling the gap between the lower rail 10 and the upper rail 20 with this sliding member to eliminate the rattling.

JP 2013-177041 A JP 2006-36035 A

However, if the gap between the upper rail 20 and the lower rail 10 is filled with a sliding member or the like, there are many places where friction occurs when the sheet S is slid (movable), and the sliding property of the sliding member is excellent. Even if it exists, a big force is required when sliding the sheet | seat S compared with the case where a clearance gap is large or there is no sliding member. That is, the adverse effect of increasing the operating force occurs.
In particular, in recent years, in order to improve the comfort of the interior space of a vehicle such as a minivan or SUV (Sport Utility Vehicle), the seat S can be made longer by increasing the length of the lower rail 10. It is widespread to be slidable. When a sliding member that fills the gap between the upper rail 20 and the lower rail 10 is used for a vehicle having such a long sliding function of the seat S, the seat S is slid by the length of the lower rail 10. In this case, the necessary operating force is further increased.

  This invention makes it a subject to reduce the operating force while suppressing the said rattling with another structure under the above actual condition.

  In order to solve the above-mentioned problems, the present invention has a raceway surface having a groove shape. If it is a groove-like raceway surface, the rolling surface of the roller fits on the raceway surface, so that the roller is less likely to rattle. The fact that the backlash of the roller is difficult is exhibited not only at the time of sliding but also at rest, and suppresses the movement of the seat S accompanying the vibration of the vehicle. Further, since the roller rolls in the groove at the time of sliding, the rolling is stabilized as a surface contact or a line contact, and the operation force is reduced as compared with the conventional planar rolling.

  Specifically, the slide rail support structure according to the present invention is an upper rail in a slide rail composed of a groove-shaped lower rail having an upward opening fixed to the floor of a vehicle and an upper rail supported on the seat side of the vehicle. Is a slide rail support structure that slidably supports the lower rail in the length direction, and is attached to the upper rail, inserted into the lower rail, and rolls on the inner surface of the lower rail to guide the upper rail. The lower rail employs a configuration having a groove-like raceway surface into which the rolling surface of the roller fits.

In this configuration, the rollers can be paired in the width direction of the lower rail, as in the prior art, and at that time, the raceway surface on which the pair of rollers rolls can be grooved. The track surface can be flat and the other track surface can be the groove shape.
Further, only one roller may be provided in the width direction of the lower rail. If it is one, cost will be reduced.
The groove-like raceway surface can have a V-shaped cross section, and various forms shown in FIGS. 10A and 10B can be considered for the V-shaped. In short, the roller can fit in the groove shape. The outer peripheral surface (portion) serving as the rolling surface of the roller may be any shape as long as it can fit into the groove-like raceway surface.

  Various forms of the roller can be considered. When the roller is constituted by a bearing, it is preferable to adopt a rolling bearing. In this case, the outer ring directly contacts (fits) the raceway surface, or a ring is attached to the outer ring. It can be fitted and the ring can contact (fit) the track surface. When the former outer ring is brought into direct contact, a general-purpose rolling bearing can be adopted, which is advantageous in terms of cost. On the other hand, when the contact is made via the latter ring, there is an advantage that the contact surface of the rolling bearing can be easily matched with the groove shape of the raceway surface.

  In addition, since the slide rail support structure of each configuration described above is provided in pairs on the floor surface of the vehicle in the left and right parallel, if the track surface in the left and right slide rail support structure is symmetric, Since the drag in the rail width direction received by the rollers is bilaterally symmetric, the play suppressing effect is improved.

  Since the present invention is configured as described above, it is possible to suppress the rattling of the sheet with a simple configuration, and it is possible to slide the sheet with a smaller operating force than in the past.

Partially cut side view of an embodiment of a slide rail support structure according to the present invention Cut front view of the same embodiment Cut front view of the other embodiment Cut front view of still another embodiment Cut front view of still another embodiment Cut front view of still another embodiment Cut front view of still another embodiment Cut front view of still another embodiment Cut front view of still another embodiment Cutting front view of each example of the fitting state between the roller and the grooved raceway surface Cutting schematic diagram of one embodiment of a slide rail support device according to the present invention

  One embodiment of the slide rail support structure according to the present invention is shown in FIGS. 1 and 2, and the slide rail support structure A1 of this embodiment (hereinafter, A2 to A8 including this A1 are collectively referred to as A) is shown in FIG. As in the prior art, the lower rail 10 attached to the floor H of the vehicle, the upper rail 20 attached to the seat S and slidable along the longitudinal direction of the lower rail 10, attached to the upper rail 20, and in the lower rail 10 And a roller 30 that guides the sliding (movement) of the upper rail 20 and allows the seat S to slide in the longitudinal direction of the vehicle.

As shown in FIG. 2, the lower rail 10 has a groove shape with an upward opening, and its bottom plate 11 has a flat plate shape, and a cross-sectional V-shaped groove of the roller 30 from the center in the width direction to a required symmetrical distance. Shaped raceway surfaces 12, 14. The required distance is appropriately set by experiments or the like so that the upper rail 20 can smoothly slide the lower rail 10 via the rollers 30 and 30.
A side plate 13 rises from the side edge of the bottom plate 11, becomes an upper plate 15 directed inward from the upper edge thereof, and then forms a downward inner plate 16.
The upper rail 20 has a square frame shape in cross section, and the abutting edge that forms the lower surface of the upper rail 20 extends downward substantially in a U shape to reach a gap formed by the side plate 13 and the inner plate 16 of the lower rail 10. The U-shaped left and right rising plates 21 rise perpendicularly to the track surfaces 12 and 14 (bottom plate 11), and the rollers 30 are attached thereto.
The lower rail 10 and the upper rail 20 are manufactured by cutting, pressing, drawing, or the like.

The roller 30 includes a rotating shaft 31, an inner ring 32 fixed to the rotating shaft 31, and a cylindrical outer ring 34 that is rotatably fitted to the inner ring 32 via a steel ball 33. Since both rollers 30 are attached to the plate 21 of the upper rail 20 that rises perpendicularly to the bottom plate 11, the rotating shaft 31 is parallel to the bottom plate 11. Further, the groove-like raceway surfaces 12 and 14 have their center perpendiculars in the width direction (see c in FIG. 10A) perpendicular to the bottom plate 11, and the outer peripheral surface (rolling surface) 30a of the roller 30 is the groove. It has a trapezoidal cross-sectional shape that fits smoothly into the raceway surfaces 12 and 14. For this reason, the rolling surface 30a of the roller 30 smoothly makes surface contact or line (point) contact with the raceway surfaces 12 and 14 of the lower rail 10, and the roller 30 smoothly follows the raceway surfaces 12 and 14 of the lower rail 10. .
In addition, the inclination angle of the trapezoidal both sides of the raceway surfaces 12 and 14 (see 12a and 14a in FIG. 10) is arbitrary as long as the following smooth backlash prevention can be performed and the smooth rolling of the roller 30 can be ensured. .

  The slide rail support structure A1 of this embodiment is configured as described above, and this slide rail support structure is also attached to the vehicle frame H in parallel with the left and right by screwing or embedding, as in the prior art. The upper rails 20 are assembled into the lower rails 10 respectively, and the seat S is attached to the upper rails 20 (see FIG. 11). At this time, after the upper rail 20 is attached to the seat S, the upper rail 20 may be incorporated into the lower rail 10.

  As shown in FIG. 2, the state in which the upper rail 20 is incorporated in the lower rail 10 is such that the weight of the sheet S is applied to the roller 30 via the upper rail 20, 14 will be contacted. At this time, since the rolling surface 30a of the roller 30 is fitted in the groove-like raceway surfaces 12 and 14, even if the sheet S is loose, the groove wall suppresses the rattling. Therefore, the upper rail 20 (seat S) remains stationary without rattling and smoothly slides during sliding.

  FIG. 3 shows a slide rail support structure A2 according to another embodiment. In this embodiment, only one of the rollers 30 and 30 (right side in the figure) is fitted in the groove-like raceway surface 12 and rolled. The other roller 30 rolls on the same raceway surface 14 with the outer peripheral surface 30a being a flat surface. One roller 30 includes a rotation shaft 31, an inner ring 32 fixed to the rotation shaft 31, a cylindrical outer ring 34 that is rotatably fitted to the inner ring 32 via a steel ball 33, and an outer ring 32. The cylindrical ring 35 is fitted and fixed. When the outer ring 34 is brought into direct contact with the raceway surface 12 like the roller 30 in the embodiment of FIG. 2, a general-purpose rolling bearing can be adopted, which is advantageous in terms of cost. On the other hand, when contacting the raceway surface 12 via the ring 35 as in this embodiment, there is an advantage that the rolling contact surface (contact surface) 30a of the rolling bearing can be easily matched with the shape (groove shape) of the raceway surface 12. . Since the roller 30 on the left side of the figure has a rolling surface 30a parallel to the rotating shaft 31, a general-purpose rolling bearing can be adopted.

The slide rail support structure A2 of this embodiment is configured as described above, and this slide rail support structure A2 is similarly attached to the frame H of the vehicle in parallel with the left and right by screwing or embedding, The upper rails 20 are assembled in the lower rails 10 respectively, and the seat S is attached to the upper rails 20.
In the state in which the upper rail 20 is incorporated in the lower rail 10, similarly, as shown in FIG. 3, the weight of the sheet S is applied to the roller 30 via the upper rail 20, and the roller 30 is on the left and right sides of the lower rail 10. , 14 will be contacted. For this reason, the play of the sheet S is suppressed by the one roller 30 fitting and rolling on the groove-like raceway surface 12. In the figure, the right roller 30 has the same rolling surface 30a as the left roller 30, and only the left roller 30 has a rolling surface 30a that is trapezoidal in cross section and fits into the groove-like track surface 14. It can also be made to roll.

FIG. 4 shows a slide rail support structure A3 according to another embodiment. In this embodiment, only one roller 30 is provided in the width direction of the lower rail 10. Since there is only one roller 30, the bottom plate 11 of the lower rail 10 is also omitted from the portion having the left track surface 14 in FIG. That is, in FIGS. 2 and 3, the left upper plate 15 and the inner plate 16 are omitted. The roller 30 may be only on the left side of the lower rail 10 (see the left side A3 ′ in FIG. 11).
Similarly, in the embodiments A3 and A3 ′, the weight of the sheet S is applied to the roller 30 via the upper rail 20, and the roller 30 comes into contact with the raceway surface 12 or 14 on one side of the lower rail 10. For this reason, the play of the sheet S is suppressed by the roller 30 fitting and rolling on the groove-like raceway surface 12 or 14.
2 and 3, the roller 30 that rolls on the left raceway surface 14 is omitted (the upper plate 15 and the inner plate 16 remain), and the roller 30 is the width of the lower rail 10. It can also be a single direction.

5 to 8 show still other embodiments of slide rail support structures A4 to A7. In each of these embodiments, the bottom plate 11 is shaped like a cross section from the center (FIG. 5), and the reverse cross section is shown in FIG. The bottom plate 11 is shaped like a letter (FIG. 6), the side of the bottom plate 11 is shaped like a cross-section (FIG. 7), and the cross-section is a reverse letter C (FIG. 8). Groove-like raceway surfaces 12 and 14 are formed on the surface.
In each of the embodiments A4 to A7, since the side walls of the raceway surfaces 12 and 14 are inclined surfaces, the lateral movement of the roller 30 is high, and the backlash suppressing action is high.
Also in the embodiments A4 to A7, one of the rollers 30 may be omitted, or only one of the rollers 30 from which the upper plate 15 and the like are omitted as in the embodiments A3 and A3 ′ of FIG.

  In each of the embodiments A1 to A7, the groove-like raceway surfaces 12 and 14 are formed by cutting the bottom plate 11, but can be formed by bending a steel plate. For example, in Embodiment A1 shown in FIG. 2, it becomes the aspect by the bending process of the steel plate shown in FIG.

  The groove-like raceway surfaces 12 and 14 may have various modes. As shown in FIGS. 10A and 10B, the groove-like raceway surfaces 12 and 14 may have a V-shaped cross section, or as shown in FIG. It can be arcuate. At this time, the contact state between the rolling surface 30a of the roller 30 and the raceway surfaces 12 and 14 may be per surface (Fig. (A)), per 2 points (Fig. (B)), per 4 points. (The same figure (c)), the hit degree is arbitrary if the roller 30 can roll smoothly.

  As described above, the slide rail support structures A1 to A8 having the above-described configurations are provided on the vehicle floor H in pairs on the left and right sides, so that the rollers 30 and the track surfaces 12 and 14 in the left and right slide rail support structures A are provided. The rolling mode is preferably symmetric. For example, the slide rail support structures A3 and A3 'shown in FIG. 4 and the like are attached as shown in FIG.

In each of the slide rail support structures A1 to A8, when the seat S is adjusted to a required position, the raising and lowering claws attached to the upper rail 20 are inserted and locked into the holes of the lower rail 10 so that both the rails 10 and 20 are attached. A well-known locking mechanism such as a uniting mechanism (see Patent Document 2 etc.) is attached.
In each embodiment, the rolling surface 30a of each roller 30 can of course be formed by the outer ring 34 or the ring 35.
Thus, it should be thought that embodiment disclosed this time is an illustration and restrictive at no points. It goes without saying that the scope of the present invention is defined by the terms of the claims, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

A1, A2, A3, A4, A5, A6, A7, A8 Slide rail support structure H Vehicle floor (frame)
S Seat 10 Lower rail 11 Lower rail bottom plate 12, 14 Lower rail grooved raceway surface 13 Lower rail side plate 15 Lower rail upper plate 16 Lower rail inner plate 20 Upper rail 21 Upper rail rising plate 30 Roller 30a Roller rolling surface (outer periphery) surface)
31 Roller shaft 32 Inner ring 33 Steel ball 34 Outer ring 35 Ring

Claims (7)

In a slide rail comprising a groove-shaped lower rail (10) with an upward opening fixed to the floor of a vehicle and an upper rail (20) supported on the vehicle seat (S) side, the upper rail (20) is A slide rail support structure for slidably supporting the lower rail (10) in its length direction,
A roller (30) attached to the upper rail (20), inserted into the lower rail (10) and rolling on the inner surface of the lower rail (10) to guide the upper rail (20);
The lower rail (10) has a slide rail support structure having a groove-like raceway surface (12, 14) into which a rolling surface (30a) of the roller (30) is fitted.   The slide rail support structure according to claim 1, wherein only one roller (30) is provided in the width direction of the lower rail (10).   The rollers (30) are paired on the left and right in the width direction of the lower rail (10), and one of the raceway surfaces (12, 14) on which the pair of rollers (30, 30) rolls is flattened. The slide rail support structure according to claim 1, wherein the other raceway surface (12) has the groove shape.   The groove-like raceway surface (12, 14) has a V-shaped cross section, and the rolling surface (30a) of the roller (30) that fits and rolls on the groove-like raceway surface (12, 14) has a trapezoidal cross section. The slide rail support structure according to any one of claims 1 to 3.   The slide rail support structure according to any one of claims 1 to 4, wherein the roller (30) is a rolling bearing, and an outer ring (34) thereof is in contact with the raceway surface (12, 14).   The roller (30) is a rolling bearing, and a ring (35) is fitted to the outer ring (34), and the ring (35) contacts the raceway surface (12, 14). The slide rail support structure described in 1.   A slide rail support device comprising the slide rail support structure (A1, A2, A3, A4, A5, A6, A7, A8) according to any one of claims 1 to 6 parallel to a floor of a vehicle. A slide rail support device in which the raceway surfaces (12, 14) in the left and right slide rail support structures are symmetrical.

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