JP2000177441A - Slide device for vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a slide device for a vehicle having a slide piece easy to install to an upper rail. SOLUTION: This slide device includes a lower rail mounted on a vehicle floor and formed with an opening in an upper face; and an upper rail 3 having both a lower end part 311 capable of sliding in the lower rail and an erect plate body part 31 projecting from the opening of the lower rail, while a seat is fixed to the plate body part 31. A slide piece 1 includes a main body 11 having an about U-shape in a plan view inserted and installed into a lower end of a longitudinal end part of the upper rail plate body part 31 from a longitudinal direction; and elastically deformable slide contact pieces 13, 14, 15 projectingly curving toward wall faces of the lower rail, formed with slide contact parts 131, 142, 152 in their top parts slidably contacting with the wall parts of the lower rail horizontally and vertically.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sliding device for a vehicle seat, and more particularly to a sliding device for a vehicle seat provided with a slide piece that can be easily mounted.

[0002]

2. Description of the Related Art FIG. 11 shows a conventional slide device for a vehicle seat provided with a slide member (slide piece) 6. As shown in FIG. In the drawing, a lower rail 2 provided on the vehicle floor side has a substantially U-shaped cross section that opens upward, while an upper rail 3 has a horizontal plate-like shape with an upright plate portion 31 formed by stacking two plate members. It has a lower end portion 311, and the plate portion 31 and the lower end portion 31 have a substantially inverted T-shape. The lower end of the plate portion 31 and the lower end portion 311 are located in the lower rail 2. The upper rail 3 is supported by roller bearings (not shown) at a plurality of locations in the longitudinal direction so that the upper rail 3 can move in the longitudinal direction of the lower rail 2.

The slide piece 6 is made of a resin, and has a base 6 having a constant thickness and extending horizontally just below the lower end 311 of the upper rail 3.
1 and legs 6 extending upward from both ends of the base 61, respectively.
The distal ends of the legs 62 and 63 are bent in a U-shape and are engaged with the upper edges of the lower end 311 of the upper rail at both side edges bent upward. In this state, the convex portions 621 and 631 formed on the side surfaces of the base portion 61 and the leg portions 62 and 63 slidably contact the inner surfaces of the left and right side walls of the lower rail 2 to guide the upper rail 3 in the horizontal direction and guide each leg portion 6.
The convex portions 622 and 632 formed on the upper end surfaces of the lower rail 2 and 63 slide and contact the lower surface of the opening edge horizontal wall 22 of the lower rail 2 to guide the upper rail 2 in the vertical direction.

A U-shaped retainer 41 is provided along the outer periphery of the lower rail 2, and the cover body 4 is held along the lower rail 2 by the retainer 41. It extends so as to cover and abuts the plate body portion 31 of the upper rail 3.

[0005]

In the above-mentioned conventional slide device, when the slide piece 6 is mounted on the upper rail 3, the legs 62, 63 of the slide piece 6 are engaged with the lower end 311 of the upper rail 3 while being greatly expanded. Therefore, mounting is difficult, and the legs 62 and 63 are often damaged.

Further, the lip 43 of the cover body 4 is slid in contact with the longitudinal end of the upper rail plate body 31, thereby damaging the lip 43 or causing the lip 43 to move between the opening edge of the lower rail 2 and the upper rail 3. There was a problem of being caught between the plate portion 31.

Accordingly, an object of the present invention is to solve such a problem, and an object of the present invention is to provide a sliding device for a vehicle seat having a sliding member which can be easily mounted on an upper rail.

It is another object of the present invention to provide a sliding device for a vehicle seat having a sliding member which minimizes fluctuation of a sliding load due to deformation of a rail cross section and has excellent durability.

Another object of the present invention is to provide a sliding device for a vehicle seat that can prevent damage to a cover body.

Another object of the present invention is to provide a sliding device for a vehicle seat which can prevent a cover body from being caught between an opening edge of a lower rail and a plate portion of an upper rail.

[0011]

In order to achieve the above object, according to the first aspect of the present invention, a lower rail (2) provided on a vehicle floor side and having an opening formed on an upper surface along a longitudinal direction.
And a lower end (311) that slides in the lower rail (2) and an upper rail (3) that protrudes from an opening of the lower rail (2) and has an upright plate body (31) to which a seat is fixed. The sliding device for a seat has a substantially U-shaped mounting portion (11) in a plan view, which is inserted into the lower end of the longitudinal end of the upper rail plate body portion (31) in the longitudinal direction and mounted. Guide portions (12, 13, 14, 1) for slidingly contacting the wall surface of the lower rail (2) to guide the upper rail (3)
A slide member (1) having 5) is provided.

In the first aspect of the present invention, the slide member is easily mounted by simply inserting the slide member into the longitudinal end of the upper rail plate portion from the longitudinal direction, and no damage or the like occurs during mounting.

In the second aspect of the present invention, the guide portion is curved convexly toward the wall surface of the lower rail (2) and has a top portion (12).
1, 131, 142, and 152), which are elastically deformable sliding contact pieces (12, 13, 14, 15) that are in sliding contact with the wall surface. Displacement of the sliding contact pieces with respect to the wall surface is substantially restricted. .

In the second aspect of the present invention, even if the cross section of the rail is deformed, the sliding contact piece is elastically deformed and absorbs it, so that the pressure at which the top of the sliding contact piece contacts the wall surface of the lower rail hardly changes. Fluctuations in slide load are minimized. In addition, since both ends of the sliding contact piece are substantially restricted from being displaced with respect to the wall surface, the sliding contact piece is in a so-called double-supported state, and has better deformation durability than the cantilevered state.

In the third invention, a flexible cover (4) for closing the opening of the lower rail (2) is provided at both opening edges of the lower rail (2), and the sliding member (1) is provided.
Has a head (111) that covers at least a portion at the same height as the cover body (4) at the longitudinal end of the upper rail plate body part (31).

In the third aspect of the invention, since the longitudinal end of the metal upper rail plate is usually covered by the head of the slide member, the cover body and the end of the upper rail plate having the corners are covered. No direct contact with parts. Thus, there is no possibility that the cover is damaged when the upper rail is moved.

In the fourth aspect of the present invention, the head (111) is shaped so as to push the cover (43) upward.

In the fourth aspect of the present invention, since the cover is pushed upward by the head, the cover moves between the opening edge of the lower rail and the plate of the upper rail as the upper rail moves. The trouble of getting caught in the horn is prevented.

The reference numerals in parentheses indicate the correspondence with specific means described in the embodiments described later.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) In FIG.
The lower rail 2 provided on the vehicle floor side has a substantially U-shaped cross section that opens upward, and its opening edge is bent horizontally inward and then vertically downward. On the other hand, the upper rail 3 has an upright plate portion 31 formed by stacking two plate members and a horizontal plate-like lower end portion 311. The plate body portion 31 and the lower end portion 31 have a substantially inverted T-shape. The lower end and the lower end 311 of the plate portion are located in the lower rail 2 and
Both ends of the lower end 311 are bent vertically upward. A U-shaped bracket 32 is fixed to the lower surface of the lower end 311 at a plurality of positions in the longitudinal direction of the rail (perpendicular to the paper surface), and the support shaft 3 laid horizontally on the bracket 32 is fixed.
A roller bearing 34 is rotatably mounted on the roller 3, and the roller bearing 34 is located on the bottom wall of the lower rail 2 and supports the upper rail 3 movably along the lower rail 2.

A slide piece 1 as a slide member is mounted on a longitudinal end of the upper rail plate 31 in a structure to be described later. A U-shaped retainer 41 is disposed on the outer periphery of the lower rail 2 along the outer periphery of the lower rail 2.
1, the cover body 4 is held along the opening edge of the lower rail 2. The lip 43 of the cover 4 is normally
As shown by a chain line in the middle, the lip portion extends so as to cover the opening of the lower rail 2 and abuts on the side surface of the plate portion 31 of the upper rail 3, but extends from the left and right where the head 111 of the slide piece 1 is located. Reference numeral 43 extends on the top surface of the head 111 and is pushed upward.

FIG. 2 is a plan view of the slide piece 1, and FIG. 3 is a side view thereof. The slide piece 1 is an integrally molded product of a resin material, and its main body 11 functioning as a mounting portion has a substantially U-shape in plan view as shown in FIG. 4, which is a cross-sectional view taken along the line IV-IV of FIG. The end becomes the above-described head 111, and a locking projection, more specifically, a triangular wedge-shaped projection 114 is formed on the facing surface near the open end of the legs 112, 113. The slide piece 1 is shown in FIG.
As shown in the figure, the wedge-shaped protrusion 114 is inserted from the horizontal direction into the longitudinal end of the plate portion 31 of the upper rail 3.
However, it is attached to a not-shown locking portion formed on the plate portion 3 of the upper rail 3, specifically, a locking hole.

As shown in FIG. 3, the main body 11 has a substantially U-shape which faces downward in a side view, and abutment pieces 12, 13 extend rearward from a head 111 in a lower half thereof. Contact pieces 12, 13
5, which extends from the left and right positions of the head 111 in a substantially arcuate shape protruding outward from the left and right positions, as is apparent from FIG. The central top portion is further bent outwardly and protruded to form sliding contact portions 121 and 131.
It has become.

As shown in FIG. 2, supporting portions 141 and 151 extend outward from the front and rear ends of the main body 11, respectively, and a contact piece 1 is provided between the front and rear supporting portions 141 and 151.
4 and 15 are formed. As is clear from FIG. 6, which is a cross section taken along the line VI-VI in FIG. 2, these contact pieces 14, 15 are curved in a substantially arc shape that protrudes upward.
The center top of 5 further has a circular portion (FIG. 2) projecting upward to form sliding contact portions 142 and 152.

The slide piece 1 having such a structure is shown in FIG.
When it is mounted on the plate body portion 31 of the upper rail 3 and positioned in the lower rail 2 as shown in FIG. 8, as shown in FIG. 8, which is a cross section taken along line VIII-VIII in FIG. The contact portions 121 and 131 abut the outer surfaces of the left and right vertical walls 21 at the opening edge of the lower rail 2 to position the upper rail 3 in the horizontal direction. Also, the sliding contact portion 14 of each contact piece 14, 15
Reference numerals 2 and 152 abut against the lower surface of the horizontal wall 22 at the opening edge of the lower rail 2 to position the upper rail 3 in the vertical direction. In this way, the upper rail 3 moves along the lower rail 2 while being guided horizontally and vertically by the slide piece 1.

In this case, even if the cross-sectional shape of the lower rail 2 changes during fastening and fixing to the vehicle floor, each contact piece 1
2, 13, 14, and 15 are vertical walls 2 at the lower rail 2 opening edge.
1 In accordance with the variation of the relative distance from the outer surface or the lower surface of the horizontal wall 22, the curved portion is elastically curved and deformed to absorb the variation in the distance.
Each of the sliding portions 121, 131, 142, and 152 always contacts the outer surface of the vertical wall 21 or the lower surface of the horizontal wall 22 with an appropriate pressure. Thereby, the fluctuation of the slide load is minimized.

Both ends of the contact pieces 14 and 15 are supported by the support portion 1.
Since it is fixed to 41, 151, both ends are not displaced with respect to the lower surface of the horizontal wall 22, and only the center of the contact pieces 14, 15 is displaced in a so-called double-supported state, so that the deformation durability is excellent. On the other hand, the base ends of the contact pieces 12 and 13 are
1 and the front end abuts on the side surface of the plate portion 31 of the upper rail 3.
Both ends of 2 and 13 are not displaced with respect to the outer surface of the vertical wall 21. Therefore, also in the contact pieces 12 and 13, only the center thereof is displaced in a state of holding both ends, so that the deformation durability is excellent.

In the present embodiment, the cover 4
Since the end of the metal upper rail plate 31 having the same height as the lip 43 is covered by the head 111 of the resin slide piece 1, the lip 43 is moved when the upper rail 3 moves. There is no danger of direct damage to the corners of the device. Also, since the lip portion 43 is pushed upward from below by the head 111 as described above, the lip portion 43 is bent downward when the upper rail 3 moves, and the opening edge of the upper rail plate body portion 31 and the lower rail 2 is opened. There is no problem of being caught in between.

(Second Embodiment) In FIG. 9, the slide piece 5 is entirely formed into a mountain shape in a front view by integral molding of a resin material, and a mounting portion 51 is provided at the center, and guide portions 52 and 53 are provided at left and right positions. Are formed. The mounting portion 51 is formed in a U-shape in plan view, and is inserted into the longitudinal end face of the plate portion 31 of the upper rail 3 from a horizontal direction and mounted. Note that a wedge-shaped projection similar to that in the first embodiment may be formed on the inner surface of the U-shaped mounting portion 51. The right and left guide portions 52 and 53 rise up and are then bent inward and downward, and the bent top surfaces are sliding contact surfaces 521 and 531 whose center in the longitudinal direction is higher. Also, a sliding contact projection 522 is provided at the center of the bent inner surface.
532 (FIG. 10) are formed.

When the upper rail 3 on which the slide piece 5 having such a structure is mounted is located in the lower rail 2,
As shown in FIG. 10, each guide portion 5 of the slide piece 5
The sliding contact surfaces 521 and 531 of the sliding rails 2 and 53 contact the lower surface of the horizontal wall 22 at the opening edge of the lower rail 2 to position the upper rail 3 in the vertical direction, and the sliding contact projections 522 and 532 are formed on the left and right vertical walls of the opening edge of the lower rail 2. The upper rail 3 is positioned in the horizontal direction by contacting the inner surface of the upper rail 21. In this way, the upper rail 3 moves along the lower rail 2 while being guided in the horizontal and vertical directions by the slide piece 5.

Since the end surface of the upper rail plate portion 31 having the same height as the lip portion 43 of the cover body 4 is covered by the mounting portion 51 of the resin slide piece 5, the lip portion 43 is moved when the upper rail 3 moves. There is no risk of damage to the device.

[0032]

As described above, according to the sliding device for a vehicle seat according to the first aspect of the present invention, the slide member can be easily mounted on the upper rail, and no damage or the like occurs at the time of mounting. Further, according to the sliding device for a vehicle seat of the second aspect of the present invention, it is possible to minimize the fluctuation of the sliding load due to the deformation of the rail cross section,
Also has excellent durability. Further, according to the sliding device for a vehicle seat of the third invention, it is possible to prevent the cover body from being damaged. Further, according to the vehicle seat sliding device of the fourth aspect of the present invention, it is possible to effectively prevent the cover from being caught between the opening edge of the lower rail and the plate portion of the upper rail.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a slide device provided with a slide piece according to an embodiment of the present invention.

FIG. 2 is a plan view of a slide piece.

FIG. 3 is a side view of a slide piece.

FIG. 4 is a sectional view taken along the line IV-IV in FIG. 3;

FIG. 5 is a sectional view taken along the line VV of FIG. 3;

FIG. 6 is a sectional view taken along the line VI-VI of FIG. 2;

FIG. 7 is an overall perspective view of a slide piece.

FIG. 8 is a sectional view taken along line VIII-VIII in FIG.

FIG. 9 is a perspective view of an upper rail end provided with a slide piece according to a second embodiment of the present invention.

FIG. 10 is a sectional view of a slide device provided with a slide piece.

FIG. 11 is a sectional view of a conventional slide device provided with a slide piece.

[Explanation of symbols]

1 ... slide piece, 11 ... body, 111 ... head, 1
2, 13, 14, 15 ... sliding contact pieces, 121, 131, 14
2, 152: sliding contact portion, 2: lower rail, 3: upper rail, 31: upper rail plate portion, 4: cover body, 43:
Lip part.

Claims (4)

[Claims] 1. A lower rail provided on a vehicle floor side and having an opening formed on an upper surface along a longitudinal direction, a lower end sliding in the lower rail, and an upright protruding from an opening of the lower rail to fix a seat. A sliding device for a vehicle seat, comprising: an upper rail having a flat plate portion; a substantially U-shaped mounting portion in a plan view, which is inserted and mounted in a longitudinal direction to a lower end of a longitudinal end of the upper rail plate portion. A slide device for a vehicle seat, comprising a slide member having a guide portion that slides on a wall surface of the lower rail in horizontal and vertical directions to guide the upper rail. 2. The guide portion comprises a resiliently deformable sliding contact piece which is convexly curved toward the wall surface of the lower rail and slidably contacts the wall surface at the top thereof, and both ends of the sliding contact piece are provided on the wall surface. The slide device for a vehicle seat according to claim 1, wherein displacement with respect to the vehicle seat is substantially restricted. 3. A flexible cover body for closing an opening of the lower rail is provided at both opening edges of the lower rail, and the slide member is the same as the cover body at a longitudinal end of the upper rail plate body. The sliding device for a vehicle seat according to claim 1, further comprising a head that covers at least a portion of the height. 4. The sliding device for a vehicle seat according to claim 3, wherein the head is formed in a shape that pushes and expands the cover body upward.