FR2879138A1 - Track for motor vehicle seat, has movable track unit including sheet metal support with core presenting bracket housed in recess, where flap is directly welded on lower portion of core and projection zone is welded on contour of recess - Google Patents

Abstract

The track has fixed and movable track units (7, 8), where the unit (8) has a sheet metal profile (13) sliding on the unit (7). The unit (8) has a sheet metal support (12) with a core (14) presenting a bracket housed in a recess. The recess is made by a U shaped cut delimited by a flap. The flap is directly welded on lower portion of the core and a projection zone is welded on contour of the recess to fix the support on the profile. An independent claim is also included for a seat of a vehicle including a base carried by the support of a track.

Description

Slide for vehicle seat and seat

  The present invention relates to slides 5 for a vehicle seat and to seats comprising such slides.

  More particularly, the invention relates to a slide for vehicle seat comprising first and second slide members, the first slide member comprising: a sheet metal profile slidably mounted on the second slide member in a longitudinal direction, said profile comprising a base provided with at least one through recess, and - a sheet metal support comprising a core which has at least one fixing lug housed in the recess passing through the profile.

  The document DE-U-201 15164 describes an example of such a slideway, in which the fastening tab penetrates into a recess formed in the base of the profile and forms a stop bearing under the base to reinforce the fixing of the support. on the profile.

  However, with such a bracket which is housed and support under the base, it can be difficult to directly fix the bracket against the base by any suitable means and in particular by welding because of its inaccessibility from the outside of the slide when the first and second slide members are assembled.

  The present invention is intended to overcome this disadvantage.

  For this purpose, according to the invention, a slide of the kind in question is characterized in that the through recess is delimited on one of its sides by a flap which extends substantially parallel to the core of the sheet metal support. , and in that the flap of the profile is fixed on the core of the sheet metal support.

  Thanks to these arrangements, the flap of the profile is directly oriented towards the outside of the first slide element and therefore of the slide which makes it easy to fix by any suitable means the flap of the profile of the first slide element on the web of the sheet metal support even when the first and second slide members are already mounted to form the slide for vehicle seat.

  In addition, the solution proposed here does not weigh down the slide and makes it easy to accommodate constraints of available places.

  In preferred embodiments of the invention, one or more of the following arrangements may be used in addition: the flap and the core extend substantially in the longitudinal direction; - The fastening lug of the sheet metal support has a stamped area forming on a first face of the fixing lug a recessed area and on a second face of the fixing lug a protruding area so that the projecting area. the fixing lug is in contact with the contour of the recess while the first face of the fixing lug is in contact with the flap of the profile; - The base of the profile is laterally extended by at least one wing, and the recess is located in the junction between the base and the wing so that the flap forms an extension of the wing of the profile; - The profile of the wing has a deformed zone housed inside the recessed area of the bracket of the sheet metal support so as to fix said sheet metal support on the profile; - The bracket and the support core are: 3 respectively welded to the contour of the recess and the flap of the profile; - The fastening lug housed in the recess of the profile of the first slide member is adapted to come into abutting contact against an abutment member integral with the second slide member when the profile reaches a predetermined end of travel position relative to the second slide element; - The slide comprises at least two fixing lugs which are each fixed in a corresponding recess of the profile; - The slide comprises a motorized worm-type device which cooperates with a nut to allow movement of the profile relative to the second element, said nut being retained longitudinally between the two fastening lugs of the sheet metal support fixed on the profile of the first slide element.

  Furthermore, the invention also relates to a vehicle seat comprising a seat supported by at least one support of a slide as defined above.

  Other features and advantages of the invention will become apparent from the following description of several of its embodiments, given by way of non-limiting examples, with reference to the accompanying drawings.

  In the drawings: FIG. 1 is a diagrammatic view of a vehicle seat comprising a set of slides according to a first embodiment of the invention, FIG. 2 is a perspective view of the set of slides of FIG. FIG. 3 is a cross-sectional view of a slide according to a first embodiment of the invention; FIG. 4 is an enlarged schematic view of the recess made in the slide for receiving FIG. 5 shows a cross-sectional view of the slideway according to a second embodiment of the invention; FIG. 6 shows a cross-sectional view of the slideway according to a third variant embodiment; FIGS. Figures 7 and 8 show alternative embodiments of the support attached to the slide, and Figures 9 and 7LO respectively show front and side views of a bracket of the sup port reported on the slide.

  In the different figures, the same references designate identical or similar elements.

  FIG. 1 represents a motor vehicle seat 1 which comprises a backrest 2 carried by a seat 3 itself slidably mounted on a floor 4 of the vehicle in a longitudinal direction X. For this purpose, the seat 3 is connected to the floor 4 by a set of 5 slides comprising two parallel rails 6, visible in Figure 2, and the unlocking is controlled for example by a lifter 5a known per se.

  Each of these slides 6 comprises first and second slide members 8 and 7 which slide one inside the other in the longitudinal direction X. The slide element 7 can be fixed to the floor 4 of the vehicle.

  The slider element 8 may itself be movably mounted in the slider element 7 while supporting the seat 3, for example by means of a raising mechanism (not shown) for adjusting the height of the slider. the seat 3 in the vertical direction Z. As shown in more detail in Figure 3, the fixed slide member 7 may be for example in the form of a female section made of folded sheet and cut, substantially shaped of U, and which comprises: a horizontal base 9 intended to be fixed to the floor 4 of the vehicle, two lateral and vertical wings 10 which extend substantially perpendicularly to the base 9, and - two reentrant troughs 11 which extend the lateral wings 10 towards the inside of the slide and toward the base 9.

  The sliding slide member 8 comprises, meanwhile, a support 12 in sheet metal and an upper section 13 in the form of a male section made from folded sheet and cut.

  The support 12 in sheet metal comprises a substantially vertical core 14 which carries the seat 3 in the example considered here. The core 14 carries the seat 3 by means of the raising mechanism mentioned above, and more particularly by means of raising rods (not shown in Figure 2) belonging to this raising mechanism and which can be pivotally mounted in holes 14a, 14b formed in the core 14 of the support 12.

  The male upper section 13 which is made from a folded and cut sheet has substantially an inverted U shape which comprises a horizontal base substantially perpendicular to the core 14 (or more generally forming a non-zero angle with the core 14). ) this base 15 extending in a transverse direction Y perpendicular to the longitudinal direction X, between two lateral parts in sliding connection with the fixed slide element 7.

  In the example considered here, the two lateral parts in question comprise two wings 16 substantially perpendicular to the base 15, which extend downwards towards the base 9 of the first slide element 7. These wings 16 are they extended, towards the outside and away from the base 9, by two flaps 17 which penetrate into the space provided between the lateral wings 10 and the reentrant troughs 11 of the fixed slide element 8.

  Balls (not shown) or other rolling elements are generally interposed between the flaps 17 and the side wings 10 on the one hand, and between the flaps 17 and the reentrant troughs 11 on the other hand.

  In general, the shapes of the two slide elements may be similar, for example, to those described in document FR-A-2 755 653.

  As can be seen in FIG. 3 which represents a first variant embodiment of the invention, the core 14 of the support 12 has, in its lower part, at least one fixing lug 18 which is directly housed in a through recess 19 made in the middle part of the base 15 of the profile 13. This recess 19 of the base 15 can be made, as can be seen in FIG. 4, by a cutout 20 directly made on the base 15 and which has a This U-shape of the cutout 20 is delimited by a portion 21 of the base 15 which is intended to be folded upwards to form, as can be seen in FIG. 3, a flap 21 which is extending vertically and parallel to the core 14 of the sheet metal support 12.

  The fastening lug 18 of the support 12 also has a stamped zone 22 forming on a first face 12a of the support 12 a recessed zone 23 and on a second face 12b of the support 12 a protruding zone 24 which is intended to be in contact with the contour of the recess 19 of the base 15. This stamped area 22 of the fixing lug 18 is made such that, during the introduction of the fastening lug 18 inside the recess 19 , the projecting zone 24 is in contact with the contour of the recess 19 of the base 15 while the lower portion of the core 14, at the face 12a of the support 12, is in direct contact with the flap 21 of the base 15.

  In order to fix this support 12 on the male section 13 it suffices, for example, to weld the protruding zone 24 on the contour of the recess 19 of the base 15 while the flap 21 is directly welded to the lower portion of the core 14. The welding points may for example be made by a laser welding process, in particular by a so-called laser welding process said transparency or by a method of arc welding inert atmosphere with tungsten electrode also called welding TIG.

  Thanks to these arrangements, the support 12 is fixed to the male section 13 by welds located in different vertical planes, namely at the tab 21 and at the projecting zone 24 of the sheet metal support 12, which reinforces considerably the stability of the support 12, without this support 12 has a large footprint and without weakening the overall strength of the slide 6.

  As can be seen in FIG. 7, when the support 12 extends substantially over the entire length of the male section 13, the web 14 of the support 12 may have at its lower portion, for example, four fastening tabs 18 of in order to ensure a good maintenance of this sheet metal support 12 on the male section 13.

  According to another variant shown in FIG. 8, the male profile 13 may also carry two sheet metal supports 12 which will for example be fixed at the end portions of the male section 13, in this case each sheet metal support 12 may for example have two fixing lugs so as to maintain them on the male section 13.

  FIGS. 9 and 10 LO represent an embodiment of a fastening lug 18 made in the lower part of the core 14 of the support 12. As can be seen in FIG. 9, the lower portion of the core 14 it has on both sides of the fixing lug 18 recesses 25 so as to provide a good support of the lower portion of the core 14 at the contour of the recess 19 of the base 15.

  The second embodiment of the invention shown in Figure 5 is similar to the first embodiment previously described. This second embodiment of the invention will therefore not be described in detail here; only the differences of the second embodiment with respect to the first embodiment will be explained.

  In the second embodiment shown in Figure 5, the recess 19 of the base 15 is directly formed at the junction between the base 15 and one of the side wings 16 of the male section 13. The cut 20 (Figure 4) may for example be performed when the sheet, from which is formed the male section 13, is still flat and in an unfolded state. The cutout 20 will then be made at the crease zone between the base 15 and one of the lateral wings 16 so that when this folding is performed, the portion 21 automatically extends; vertically and in the extension of the side flange 16. According to this second embodiment, the projecting zone 24 of the support 12 may also be welded to the contour of the recess 19 according to the welding processes described above. Similarly, the flap 21 forming the extension of the side flange 16 can be directly welded to the lower portion of the core 14 of the support 12 and from the outside of the male section 13 and therefore from outside the slide 6.

  According to the third embodiment shown in Figure 6, the flap 21 may not be directly welded to the core 14 of the sheet metal support 12. In this case, a portion of the flap 21 may be deformed for example by deformation by press so that a deformed zone 26 is housed inside the recessed zone 23 of the fixing lug 18 so as to fix the sheet metal support 12 on the male section 13. The projecting zone 24 of the fixing lug may, for example, always be fixed on the contour of the recess 19 of the base 15 by a welding method as described above.

  Advantageously, the fastening lug 18 of the support 12 can be adapted once housed and fixed in the recess 19 of the profile 13, to come into abutting contact with an abutment member (not shown) attached to the female section 7 when the section 13 arrives in an extreme forward or reverse position relative to the female section 7. More particularly, the stop member may for example be fixedly arranged on the base 9 of the female section7.

  Similarly, as can be seen in FIG. 7, when the support 12 comprises at least two fastening lugs 18, the slideway may be provided with a motorized device with a fixed screw and a rotating nut or vice versa, the nut 27 being directly retained in the longitudinal direction X, between the two fastening lugs 18

Claims (10)

  A slide (6) for a vehicle seat comprising first and second slide members (8, 7), the first slide member (8) comprising: a sheet metal profile (13) slidably mounted on the second slide member; slider (7) in a longitudinal direction (X), said profile (13) comprising a base (15) provided with at least one through recess (19), and - a support (12) made of sheet metal comprising a core (14) which has at least one fixing lug (18) housed in the through recess (19) of the profile (13), characterized in that the through recess (19) is delimited on one of its sides by a flap ( 21) extending substantially parallel to the core (14) of the sheet metal support (12), and in that the flap (21) of the profile (13) is fixed to the core (14) of the support (12). ) in jail.   2. Slide according to claim 1, wherein the flap (21) and the core (14) extend substantially in the longitudinal direction.   3. Slide according to either of claims 1 and 2, wherein the bracket (18) of the support (12) sheet metal has a stamped area (22) forming on a first face (12a) of the fixing flange (23) and on a second face of the fastening flange a projecting zone (24) so that the protruding region (24) of the fastening flap (18) is in contact with the contour of the recess (19) while the first face (12a) of the bracket (18) is in contact with the flap (21) of the profile (13).   4. Slide according to claim 3, wherein the base (15) of the profile (13) extends laterally by at least one wing (16), and the recess (19) is located in the junction between the base (16). 15) and the flange (16) so that the flap (21) forms an extension of the flange (16) of the profile (13).   5. Slide according to claim 4, wherein the flange (16) of the profile (13) has a deformed zone (26) housed inside the recessed zone (23) of the fastening lug (18). support (12) made of sheet metal so as to fix said sheet metal support on the profile (13).   6. Slide according to any one of the preceding claims wherein the bracket (18) and the core (14) of the support (12) are respectively welded to the contour of the recess (19) and the flap (21). ) of the profile (13).   7. Slide according to any one of the preceding claims, wherein the fixing lug (18) housed in the recess (19) of the profile (13) of the first slide member (8) is adapted to come into abutting contact. against a stop member secured to the second slide member (7) when the profile (13) arrives at a predetermined end position relative to the second slide member (7).   8. Slide according to any one of the preceding claims, comprising at least two fastening lugs (18) which are each fixed in a recess (19) corresponding to the profile (13).   9. Slide according to claim 8, comprising a motorized worm type device which cooperates with a nut to allow movement of the profile (13) relative to the second element (7), said nut being retained longitudinally between the two legs of fastening (18) of the support (12) in sheet metal fixed to the profile (13) of the first slide element (8).   10. Vehicle seat (1) having a seat (3) carried by the support (12) of a slide (6) according to any one of the preceding claims.