JPH0330180Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial application field" The invention consists of a rail on the vehicle body side and a rail on the seat side that is movably fitted to the rail on the vehicle body side and supports the seat. The present invention relates to a seat slide device having a rail unit.

"Conventional technology" Conventional seat slide devices include, for example,
This is as shown in FIG. 9, which was proposed in Utility Application No. 118195/1986, which was previously filed by the present applicant.

In other words, the rail unit 1 is the upper rail 2.
The lower rail 3 is made up of a reinforcing plate 5 fixed to the rail body 4, and the side edge of the lower rail 3 is formed by connecting the fitting flange 4a, which is the edge of the rail body 4, with the reinforcing plate 5. A resin slider 6 is sandwiched and attached to this side edge portion, and is slidably fitted to the upper rail 2.

"Problems to be Solved by the Invention" However, in such a seat slide device, when positioning the resin slider 6 on the lower rail 3, the resin slider 6 may come into contact with the side end surface of the fitting flange 4a of the rail body 4. The reinforcing plate 5 and the rail body 4 are in contact with the edge 5a of the reinforcing plate 5.
The fitting flange 4a of
There were problems in that it was difficult to achieve accuracy and tended to cause problems such as over-tightening and eccentric movement.

The present invention has been made by focusing on the problems of the previous technology, and aims to provide a seat slide device that has a structure that facilitates accuracy and avoids the above-mentioned problems.

``Means for Solving the Problems'' The gist of the present invention for achieving the above purpose is to provide a rail on the vehicle body and a seat that is movably fitted to the rail on the vehicle body. In a seat slide device comprising a rail unit consisting of a supported seat-side rail, the one rail has a rail main body having a pair of fitting flanges in a direction perpendicular to the longitudinal direction thereof, and both fitting flanges. and a reinforcing plate installed between them, the other rail having a pair of holding grooves that hold and slidably fit the one rail, and a side edge of the one rail. The resin slider is clamped and mounted, and the resin slider is slidably fitted into the holding groove of the other rail, and the resin slider and the side edge of the one rail are connected to each other by the resin slider. The seat slide device is characterized in that the side end face of the fitting flange of the rail body and the side end face of the reinforcing plate are combined so as to be positioned by contacting only one of them.

``Function'' However, since the position of the resin slider is determined based only on either the rail body or the reinforcing plate, it is possible to perform accurate positioning without depending on the assembly accuracy, and The rail and the rail on the seat side can be inserted and fitted together smoothly and reliably.

"Embodiments" Hereinafter, various embodiments of the present invention will be described based on the drawings. Note that similar parts in each embodiment are designated by the same reference numerals, and redundant explanation will be omitted.

1 to 6 show an embodiment of the present invention.

As can be seen in FIG. 3, the seat slide device 10 has rail units 20,
20 is placed parallel between the bottom surface of the seat and the floor,
An electric motor 11 serving as a drive source is connected to both rail units 20, 20, which is housed in the front lower part of the seat cushion of the seat. A flexible cable 12 for transmitting rotational driving force from the electric motor 11 extends to both rail units 20, 20.

Since the rail units 20 and 20 have symmetrical and identical structures, only one will be explained below and the other will be omitted.

The rail unit 20 includes a rail 30 on the vehicle body side fixed to the floor and a rail 4 on the seat side supporting the seat fixed to the lower part of the seat cushion of the seat.
0 are fitted to be movable relative to each other.

The rail 30 on the vehicle body side constitutes the lower part of the rail unit 20, and the mounting face plate 3 of the rail body 31
A side wall rises from 2, and fitting flanges 33, 33 are folded at the end of this side wall facing outward, and mounting legs 30a, 30b are fixed to the floor at both ends of the mounting face plate 32 with bolts or the like. is permanently installed.

Furthermore, a reinforcing plate 34 is fixed horizontally to the fitting flanges 33, 33 and extends in the longitudinal direction, and a long groove extending in the longitudinal direction is formed in the reinforcing plate 34. is engraved with rack 35.

The rail 40 on the seat side has side walls 42, 42 falling down from a horizontal main surface plate 41 with a width wider than between the tips of the fitting flanges 33, 33 of the rail 30 on the vehicle body side.
Holding flanges 43, 43 are folded inwards facing inward, and a holding groove 40a is formed between the holding flange 43 and the horizontal main surface plate 41.

A resin slider 21 is interposed between the fitting flange 33 of the rail 30 on the vehicle body side and the side edge of the reinforcing plate 34 and a holding groove 40a formed by the holding flange 43 of the rail 40 on the seat side.

As can be seen in FIGS. 1, 2, and 6, the resin slider 21 is fitted into a notched groove 36 carved in the edge of the reinforcing plate 34 so that it cannot move laterally. The corner portions 22, 22 that fit into the holding grooves 40a of the rail 40 on the seat side are rounded.
The sliding contact surfaces are provided with slits 23, 23 to improve the fit.

At the notch groove 36, the side end surface 33a of the fitting flange 33 of the rail main body 31 escapes inwardly from the side end surface 34a of the reinforcing plate 34, and the inner surface of the resin slider 21 meets the side end surface of the reinforcing plate 34. 34a
Positioning in the width direction is performed by making contact with the .

A drive unit base 45 is fastened and fixed from above to the horizontal main surface plate 41 of the seat-side rail 40 with screws, and a drive shaft 46 is vertically connected between the base wall of the drive unit base 45 and a support hub extending downward from the base wall of the drive unit base 45. is rotatably supported.

A through hole facing the long groove of the rail 30 on the vehicle body side is bored in the horizontal main surface plate 41 of the rail 40 on the seat side, and the tip of the vertical drive shaft 46 and the support hub are inserted through the through hole and are connected to the vehicle body side. The pinion 47 extends into the space between the rail 30 on the side of the vehicle and the rail 40 on the seat side, and a pinion 47 that meshes with the rack 35 of the rail 30 on the vehicle body side is fixed at the end thereof.

A worm wheel 48 is fixed to the base of the vertical drive shaft 46 . A worm 49 that meshes with a worm wheel 48 is rotatably supported on the side of the drive unit base 45 via a horizontal axis 49a extending in the longitudinal direction of the rail 40 on the seat side.

One end of the horizontal shaft 49a forms a connecting end 49b having a connecting groove, and a flexible cable 12 extending from the electric motor 11 is connected to the connecting end 49b.
The ends are connected.

Next, the action will be explained.

The rail 30 on the vehicle body side is assembled by spot welding a rail main body 31 and a reinforcing plate 34 together. The notch groove 36 essentially determines the sliding condition between the rail 30 on the vehicle body side and the rail 40 on the seat side.
This is the side end surface 34a of the reinforcing plate 34 in FIG.

At the notch groove 36, the side end surface 33a of the fitting flange 33 of the rail body 31 is set to escape inward from the side end surface 34a of the reinforcing plate 34.
It is not difficult at all to achieve positional accuracy to the extent of simply escaping. The width between the side end surfaces 34a, 34a on both sides is processed with extremely high precision by punching.

In order to insert and slidably fit the rail 30 on the vehicle body side into the rail 40 on the seat side, insert the resin slider 21 into a notch in the rail 30 on the vehicle body side so that its inner surface abuts the side end surface 34a of the reinforcing plate 34. It is fitted into the groove 36 and inserted through the opening at the end of the rail 40 on the seat side. Resin slider 2 by slit 23
Since the outer shape of 1 is slightly bent, it can be easily inserted.

Attach other parts appropriately before and after.

When the electric motor 11 is stopped, the worm wheel 48 is restrained by the worm 49 and cannot rotate, so the vertical drive shaft 46 and pinion 47 cannot rotate either, and the rail 30 on the vehicle body side and the seat side The seat is restrained from moving relative to the rail 40, and the seat does not move.

When the electric motor 11 is started, the horizontal shaft 49a and the worm 49 are connected via the flexible cable 12.
is rotated, thereby rotating the worm wheel 48 at a large reduction ratio, and the pinion 47 is rotationally driven via the vertical drive shaft 46 to which the worm wheel 48 is fixed.

The pinion 47 is engaged with the rack 35.
As a result of the relative movement, the rail 40 on the seat side moves, and the seat supported by the rail 40 on the seat side moves either forward or backward depending on the rotational direction of the electric motor 11.

If the electric motor 11 is stopped at a desired location,
As mentioned above, the seat side rail 40 is restrained in that position. In such a configuration, in addition to smoothing the relative movement between the rail 30 on the vehicle body side and the rail 40 on the seat side, the resin slider 21 has the effect of smoothing the relative movement between the rail 30 on the vehicle body side and the rail 40 on the seat side. Since the side rail 40 always moves parallel to the reinforcing plate 34, the rack 35 of the reinforcing plate 34 and the pinion 4
The meshing relationship with 7 always guarantees a constant meshing distance,
It has the effect of enabling smooth operation.

FIG. 7 shows a second embodiment.

In this embodiment, the relief of the side end surface 33a of the fitting flange 33 of the rail body 31 is made larger than in the previous embodiment, so that the resin slider 21 does not clamp the fitting flange 33. This has the advantage that the adverse effects of plate thickness errors are reduced.

FIG. 8 shows a third embodiment, and shows that, while the first embodiment is a rail unit having a drive section by power, the present invention can be applied to a rail unit without a drive section.

In each of the above embodiments, a relief for the resin slider was provided on the rail body side, but a relief may be provided on the reinforcing plate side. When forming this relief, the relief may be provided on the resin slider side while leaving the shape of the rail body or reinforcing plate unchanged.

Further, the fitting relationship between the inside and outside of the rail on the vehicle body side and the rail on the seat side may be reversed, and they may be fitted not only from above and below but also from the sides.

"Effect of the invention" According to the seat slide device according to the invention, the rail on the vehicle body side and the rail on the seat side are inserted into each other inside and outside and slidably fitted, and one rail is reinforced with the rail body. When using a structure that combines two rails, the resin slider inserted between both rails is positioned in the width direction only by either the rail body or the reinforcing plate, which improves the fitting accuracy. can be maintained in good condition, and problems such as over-tightening and eccentric movement will not occur.

[Brief explanation of the drawing]

1 to 6 show a first embodiment of the present invention, and FIG. 1 is a cross-sectional view of the main part of the rail unit;
Figure 2 is a plan view of the rail on the vehicle body side, Figure 3 is an overall perspective view of the seat slide device, Figure 4 is a plan view of the main parts of the rail unit, Figure 5 is a sectional view taken along the line shown in Figure 4, and Figure 6. 7 is a detailed cross-sectional view of the part to which the resin slider is attached, FIG. 7 is a detailed cross-sectional view of the part to which the resin slider is attached, and FIG. 8 is a perspective view of the rail unit according to the third embodiment. FIG. 9 is a cross-sectional view of a rail unit according to the previously proposed technique. DESCRIPTION OF SYMBOLS 10... Seat slide device, 20... Rail unit, 30... Rail on the vehicle body side, 31... Rail body, 33... Fitting flange, 33a... Side end surface, 34... Reinforcement plate, 34a... Side End face, 36
...Notch groove, 40...Seat side rail, 40a...
...Holding groove, 43...Holding flange.

Claims (1)

[Claims for Utility Model Registration] A seat slide comprising a rail unit consisting of a rail on the vehicle body side and a rail on the seat side that is movably fitted to the rail on the vehicle body side and supports the seat. In the device, the one rail is composed of a rail main body having a pair of fitting flanges in a direction perpendicular to the longitudinal direction thereof, and a reinforcing plate installed between both fitting flanges, and the other rail is composed of a reinforcing plate installed between the two fitting flanges. a pair of holding grooves that hold and slidably fit the rails; a resin slider is sandwiched and mounted on the side edge of the one rail; The resin slider is slidably fitted, and the resin slider and the side edge of the one rail are connected so that the resin slider is connected to the side end face of the fitting flange of the rail body and the side end face of the reinforcing plate. A seat slide device characterized in that the seat slide device is combined so as to be positioned by contacting only one of the two.