FR2868740A1 - Motor vehicle seat fixing device, has base mounted pivotally on anchoring fork around pivoting axle between use and tilted positions, and indentation, locking hook and stop pin to block pivoting of base with respect to anchoring fork - Google Patents

Abstract

The device has an anchoring fork (9) including front and rear notches cooperating with front (17) and rear rods (18) integrated to the floor of a vehicle. A base (6) is mounted pivotally on the anchoring fork around a pivoting axle (13) between a use position and a position tilted towards the front side. An indentation (16), a locking hook (24) and a stop pin (27) block pivoting of the base with respect to the anchoring fork. An independent claim is also included for a motor vehicle comprising a floor provided with front and rear rods on which a seat is supported.

Description

Device for fixing a seat on a floor of

  vehicle, seat equipped with such a fixing device and vehicle comprising such a seat.

  The present invention relates to devices for fixing a seat on a vehicle floor, the seats equipped with such fasteners and motor vehicles comprising such seats.

  More particularly, the invention provides a device for fixing a seat on a vehicle floor, the fixing device comprising, on the one hand, a base which extends between a front end and a rear end, said base being intended to support a seat of the seat, and secondly, front and rear links reported on the base.

  Such fastening devices are in particular known from the patent application FR-2,838,391. With this type of fastening device, the front link comprises an anchoring fork which has a rear notch which is intended to cooperate with a fastener. rear rod secured to the floor of the vehicle when the anchor fork and the base are in a substantially horizontal position relative to the floor of the vehicle. This anchoring fork also comprises a front notch which is only intended to cooperate with a front rod secured to the floor when the anchoring fork and the seat which holds the seat are brought from their horizontal position to a position tilted towards the floor. 'front to the floor of the vehicle. In this forwardly tilted position, the front and rear notches of the anchor fork cooperate with the front and rear stems of the floor respectively.

  Furthermore, the anchor fork is also provided with front and rear hooks which can be brought to a locked position in which said front and rear hooks respectively trap the front and rear rods in their respective notches so as to maintain the fork of anchoring and thus the base in the tilted position forward.

  As a result, when the base and the anchor fork are in their horizontal position corresponding to the position of use of the seat, only the rear rod of the floor is trapped in the notch rear of the anchor fork by means of the rear hook.

  The rear rod of the vehicle floor therefore forms the only anchor point at the front link of the fastening device, which may be insufficient to hold and maintain the seat and therefore the seat relative to the floor in case violent shock of the vehicle.

  The present invention is intended to overcome these disadvantages by providing a seat attachment device on a floor of the vehicle, which can be easily set up on said floor of the vehicle while ensuring a perfect anchoring of the seat on the floor of the vehicle when the seat cushion is in the position of use, or in the tilted position forward.

  For this purpose, according to the invention, a fastening device of the kind in question is characterized in that the front link comprises: - an anchoring fork which has front and rear notches intended to cooperate respectively with front rods and rear fastened to the floor when the anchor fork is in an installed position relative to the floor of the vehicle, - a holding hook movably mounted on the anchor fork between an unlocked position and a locked position in which said holding hook forms with the notch rear a closed housing for trapping the rear rod and maintain the anchor fork in its installed position on the floor, and in that the base is pivotally mounted on the anchor fork around a first axis pivot between, on the one hand, a position of use in which the rear link is adapted to cooperate with means for fixing the pla Ncher to maintain the base substantially horizontally, and secondly, a tilted position forward in which locking means blocks the pivoting of the base relative to the anchor fork.

  In preferred embodiments of the invention, it may optionally be resorted to, in addition, to one and / or the other of the following provisions: - when the anchor fork is placed on the floor of the vehicle , the front notch of the anchor fork is adapted to house the front stem of the floor, and when the anchor fork is in its position installed on the floor of the vehicle, the front and rear notches of the anchor fork are respectively adapted to house the front and rear rods of the floor; - The holding hook is biased by elastic means to its locked position, and said holding hook has a cam surface adapted to abut against the rear rod to control the movement of said holding hook to its unlocked position temporarily causing the opening of the closed housing until the imprisonment of the rear rod; - The holding hook is formed on a first pivotally mounted arm on the anchor fork, the resilient means comprising a spring which extends between a first end fixed to the first arm and a second end fixed on the anchor fork to allow an elastic return of the holding hook to its locked position; - The locking means of the pivoting of the base in its forward tilted position comprise: a third notch made on the anchor fork and wherein is intended to be housed a pin of the base when said base is in its forward tilted position, and E a locking hook movably mounted on the anchor fork between an unlocked position and a locked position in which said locking hook forms with the third notch a closed housing for trapping the pin of the base and maintain said base in its tilted position forward; the locking hook is biased by resilient means towards its locked position, and said locking hook has a cam surface, which in contact with and pivoting the pin of the base, is adapted to allow the displacement of said locking hook; towards its unlocked position temporarily causing the opening of the closed housing until the imprisonment of the pin of the base; - The locking hook is formed on a second arm pivotally mounted on the anchor fork, the resilient means comprising a spring which extends between a first end fixed to the second arm and a second end fixed on the anchor fork to allow an elastic return of the locking hook to its locked position; - The holding hook and the locking hook are pivotally mounted on the anchor fork around a second pivot axis; - The first and second arm each comprise a gripping member to allow the temporary pivoting of the holding hook or the locking hook associated with it to its unlocked position; and - the first and second pivot axes each extend between an end attached to the anchor fork and an end attached to a reinforcing plate integral with said anchor fork.

  Furthermore, the invention also relates to a vehicle seat comprising a seat which is mounted on the floor of the vehicle by means of at least one fastening device as defined above.

  The invention also relates to a motor vehicle comprising a floor provided with a front rod and a rear rod on which is reported a vehicle seat as defined above.

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

  In the drawings: - Figure 1 is a side view of a vehicle seat in the use position and provided with a fastening device according to the invention; - Figure 2 is a partial view in perspective of the front link of the fixing device according to the invention, when said fixing device is in the installed position relative to a vehicle floor; - Figure 2a is a side view of the anchor fork forming part of the front link of the fastening device; - Figure 3 is an enlarged side view of the front link of the fixing device when it is placed on the floor of the vehicle; FIG. 4 is a perspective and enlarged view of the front link of the fastener when in the installed position on the floor of the vehicle, the base of the fastener being in the tilted position forwards; and FIG. 5 is a view similar to that of FIG. 4, the front link of the fastening device comprising reinforcing means making it possible to increase the force recovery of the fastening device when the seat of the vehicle seat is in the tilted position forward.

  In the various figures, the same references denote elements The seat 1 of FIG. 1 comprises, of and a backrest 3.

The second seat or the like.

  motor vehicle shown in the manner known per se, a seat 2 extends in a longitudinal direction between a front end 2a away from the backrest 3 and a rear end 2b close to the backrest. This seat 2 is intended to be fixed to a floor 4 of a motor vehicle by means of at least one fastening device 5, and preferably by means of two identical fasteners 5 arranged on either side of the vehicle. 2 in the transverse direction. This fixing device 5 comprises a base 6 intended to support the seat 2 and which extends substantially horizontally and longitudinally between a front end 6a and a rear end 6b. The fixing device 5, visible in FIG. 1, also comprises a rear link 7 secured to the rear end 6b of the base 6 as well as a front link 8 attached to the front end 6a of said base 6.

  The base 6 may be formed by a substantially L-shaped profile which extends longitudinally.

  This base 6 can be directly attached fixedly to the lower part of the seat 2. According to another variant, this base 6 can support a slide system, as shown in FIG. 1, which comprises a first fixed mounted profile. on the base 6 and a second section 9 slidably mounted on the first section, this second profile 9 being directly fixed on the lower part of the seat 2 of the seat to allow movement of the seat forward or towards the rear relative to the base 6 when the seat 2 is in the normal position of use, as shown in Figure 1.

  The rear link 7 is locked by any means known to the vehicle floor when the seat is in the normal position of use. This rear link 7 may in particular be formed by a retractable device for quick locking and unlocking of the rear of the base 6 relative to the floor 4 of the vehicle.

  Furthermore, the backrest 3 of the seat is connected to the seat 2 by means of a hinge mechanism 3a to allow the passenger of said seat to adjust the inclination of the backrest. This articulation mechanism 3a is particularly adapted to allow inclination and tilting forward of the backrest 3 so that it is disposed substantially horizontally and against the upper face of the seat 2, the backrest being then in a so-called tablet position position.

  The front link 8 of the fixing device 5 will now be described in detail with reference to FIGS. 2 to 5.

  As can be seen in more detail in Figures 2 and 2a, the front link 8 of the fastener 5 comprises an anchor fork 9 which can be made from a stamped and folded sheet. This anchoring fork 9 has a vertical core 10 which extends substantially longitudinally with respect to the direction of the seat and from which is made of material a horizontal flap 11 and a flap 12 vertical and transverse disposed at the level of the part rear portion of the vertical core 10. The front portion 6a of the base 6 is pivotally mounted relative to the anchoring fork 9 about a first axis pivot 13. More particularly, the base 6 is pivotally mounted relative to to the vertical core 10 about the first pivot axis 13 which extends horizontally and transversely.

  Moreover, as can be seen in FIG. 2a, the front part of the vertical core 10 of the anchor fork 9 comprises a first notch 14 and a second notch 15, and a third notch 16 arranged above the front 14 and rear 15 notches. The front indentation 14 has a substantially U-shaped oblong shape which is open towards the front and has a bottom 14a. The rear indentation 15 also has a substantially U-shaped oblong shape which is open downward and has a bottom 15a. The third notch 16 of the anchor fork 9 also has a substantially U-shaped oblong shape which is open upward and forward and has a bottom 16a.

  As can be seen in the various Figures 2 to 4 and in particular in Figure 3, the notch front 14 is intended to cooperate with a front transverse rod 17 fixedly mounted on the floor 4 of the vehicle. This front rod 17 is engaged in the front notch 14 when the fixing device 5, and therefore the seat 2, is placed on the floor of the vehicle (FIG. 3), when the fixing device 5 is in the installed position. (Figure 2) which corresponds to a horizontal position of the seat 2 and also when the base 6, and thus the seat 2, is tilted forwards (Figure 4).

  When the base 6 is tilted forward, the anchor fork 9 is always maintained in its installed position, as can be seen in FIG.

  The rear notch 15 is, for its part, intended to cooperate with a rear transverse rod 18 which is also fixedly mounted on the floor 4 of the vehicle. This rear notch 15 is intended to cooperate with the rear rod 18 when the anchor fork 9 is in an installed position, the base 6 can then be in the position of use (Figure 2), or in the tilted position towards the before (Figures 4 and 5).

  The front link 8 also comprises a first arm 19 which is pivotally mounted on the vertical web 10 of the anchor fork 9 around a second pivot axis 14. This first arm 19 is provided, at its front portion, of a holding hook 20 and, at its rear part, gripping means 21. The rear part of the first arm 19 is also connected to the horizontal flap 11 of the anchoring fork 9 by means of elastic means 22. In the example considered here, the elastic means 22 are formed by a coil spring 22 which extends between a first end fixed on the rear part of the first arm 19 and a second end fixed on the horizontal flap 11 of the of the anchoring fork 9. According to an alternative embodiment, the elastic means 22 may also be formed by a spiral spring disposed about the axis 14 and having a first end fixed on the axis 14 and a second end Thus, the holding hook 20 is resiliently biased by the spring 22 to a first position called locked position (Figures 2 and 4) in which the holding hook 20 forms with the notch 15 a housing closed.

  More precisely, this closed housing is delimited by the holding hook 20 and the bottom 15a of the notch 15. the holding hook 20 can also take a second position called unlocked position (FIG. 3) in which the holding hook 20 can not cooperates more with the rear indentation 15 thus causing the opening of the rear indentation 15.

  This holding hook 20 is also provided with a cam surface 20a adapted to come into contact with the rear rod 18 during the installation of the anchor fork 9 on the floor 4 of the vehicle. This control surface 20a when it comes into contact with the rear rod 18 makes it possible to cause the pivoting of the first arm 19 and thus of the corresponding holding hook 20 towards its unlocked position so as to temporarily cause the opening of the rear notch Until the rear rod 18 comes into contact with the bottom 15a of the notch 15, which then allows the spring 22 to return the holding hook 20 in its locked position. The rear rod 18 is then trapped between the holding hook 20 and the bottom 15a of the rear notch 15.

  The front link 8 also comprises a second arm 23 which is directly pivotally mounted on the vertical web 10 of the anchoring fork 9 around the second pivot axis 14. This second arm 23 has at its front part a locking hook 24 and at its rear portion of the gripping means 25. The second arm 23 is also connected to the anchoring fork 9 by means of elastic means 26. In the example considered here, the elastic means 26 are also formed by a coil spring 26 which extends between a first end fixed on the rear part of the second arm 23 and a second end fixed on the horizontal flap 11 of the anchor fork 9. This coil spring 26 can of course be replaced by a spiral spring disposed about the axis 14 and having a first end fixed on the axis 14 and a second end attached to the arm 23. The locking hook 24 is t thus biased resiliently by the spring 26 to a first position called locked position in which the locking hook 24 forms with the third notch 16 a closed housing.

  More precisely, the closed housing is delimited by the locking hook 24 and the bottom 16a of the notch 16. The locking hook 24 can also take a second position called unlocked position in which the locking hook 24 causes the opening of the third notch 16 of the anchor fork 9.

  The locking hook 24 is also provided with a cam surface 24a, which in contact and by pivoting of a pin 27 of the base 6, is adapted to allow the pivoting of the second arm 23 and thus of the locking hook 24 to its unlocked position so as to temporarily cause the opening of the third notch 16 until the pin 27 arrives at the bottom 16a of the third notch 16. The locking hook 24 can then return to its locked position by through the spring 26 so as to trap the pin 27 of the base 6.

  Thus, when a user wishes to tilt the entire seat 1 forward, it can first actuate the hinge mechanism 3a (Figure 1) to fold the backrest 3 horizontally against the upper face of the seat 2 in the tablet position. Then, the user unlocks the rear link 7 of the fastening device 5 to allow the rocking of the seat 2 forward. During the forward tilting of the seat 2 and thus of the base 6, the holding hook 20 remains in the locked position by trapping the rear rod 18 so that the anchor fork 9 remains in its installed position relative to the floor 4 of the vehicle. When the base 6 continues to swing forward, only the locking hook 24 is returned to its unlocked position through the pin 27 of the base 6. When the pin 27 arrives at the bottom 16a of the third notch 16, the spring 26 then automatically returns the locking hook 24 to its locked position thus trapping the pin 27 and thus also blocking the pivoting of the base 6 is forwards or backwards.

  When the base 6 is in this locked position and tilted forward (Figure 4), the user can either bring the base 6 and thus the seat 2 in the horizontal position or remove the seat 1 of the vehicle.

  In the first case, if the user wishes to return the seat 2 to the horizontal position, it is sufficient for him simply to actuate the gripping means 25 of the second arm 23 so as to bring the locking hook 24 into its unlocked position, and this against the force exerted by the spring 26. When the locking hook 24 is in its unlocked position, the user can then tilt the base 6 backwards, thus bringing the seat 2 into position horizontal. The backrest 3 can then be returned to its raised position to reconfigure the seat 1 in the use position.

  In the second case, if the user wishes to remove the seat 1 of the vehicle, it is sufficient to actuate the gripping means 21 of the first arm 19 and against the force exerted by the spring 22 so as to bring the holding hook 20 into the unlocked position. Then, the user rotates the seat forward so as to disengage the rear rod 18 of the rear notch 15 of the anchor fork 9.

  The user can then release by translation the front rod 17 of the floor 4 of the front notch 14 of the anchor fork so as to completely separate the fastener 5 of the seat 1 of the floor 4 of the vehicle.

  Conversely, when a user wishes to set up the seat 1 on the floor 4 of the vehicle, the folder then being in the tablet position and the anchor fork 9 being locked in rotation relative to the base 6, the user first brings the anchoring fork 9 towards the floor 4 so that the front rod 17 of the floor 4 enters the notch front 14 and comes into contact with its bottom 14a.

  The user can then tilt back the seat 1 and thus the anchor fork 9 by pivoting around the front rod 17. During this pivoting, as can be seen in Figure 3, the cam surface 20a of the holding hook 20 abuts against the rear rod 18 which thus causes the unlocking position of said holding hook 20 thus also causing the opening of the rear notch 15. The user continues to tilt the seat rearwardly, the rear rod 18 then enters the rear notch 15 until said holding hook no longer interferes with the rear rod 18. the return spring 22 can then return the holding hook 20 to its locked position thus achieving the imprisonment of the rear rod 18 in the rear indentation 15.

  The anchor fork 9 is then in a position installed relative to the floor 4 of the vehicle as shown in Figure 4, the base 6 is always in a so-called position position tilted forward.

  The user can then directly act on the gripping means 25 of the second arm 23 so as to bring the locking hook 24 into its unlocked position and this against the force exerted by the spring 26. As soon as the hook 24 is in its unlocked position, the base 6 can then pivot rearwardly about its first pivot axis 13. The seat 2 is then found in a horizontal position, the rear link 7 of the fastener cooperating then with appropriate fastening means of the floor 4 of the vehicle to fix the seat 2 against the floor 4. The backrest 3 can then be returned to its raised position by means of the hinge mechanism 3a to reconfigure the seat 1 in position d use as shown in Figure 1.

  The fastening device 5 or, more exactly, its front link 8 may also be provided with reinforcing means 28 allowing a better recovery of forces when the base 6 is in the tilted position towards the front and in the case where the latter is by example subjected to a shock of luggage directly projected on the underside of the seat 2.

  Indeed, in case of impact of a baggage on the underside of the seat 2, the base 6 tends to pivot further forward so that its pin 27 strongly rests against the bottom 16a of the third notch 16 which then tends to cause the pivoting of the whole of the anchoring fork 9 around the front rod 17 thus causing very strong mechanical stresses on the holding hook 20 through the rear rod 18 and the axis 14.

  As can be seen in FIG. 5, these reinforcing means 28 may, for example, be in the form of a linkage system 29 directly connecting the anchoring fork to the base 6. This linkage system 29 may in particular comprise a first link 30 which extends between a lower end pivotally mounted on the vertical web 10 of the anchor fork 9 and an upper end which is itself pivotally mounted on the lower end of a second link 31 , this second link 31 having an upper end pivotally mounted on the base 6.

  Thus, when the base 6 is biased to pivot forwardly, the rod system 29 automatically blocks this pivoting forward, thus avoiding that the hook 20 via its pivot axis 14 does not resume all efforts.

  The reinforcement means 28 may also comprise alone, or in combination with the tie rod system 29, a reinforcing plate 32 intended to be mounted integral with the anchoring fork 9. This reinforcing plate 32 has a shape substantially identical to that of the vertical core 10 of the anchor fork 9 so that said reinforcing plate 32 has a front notch 32a and a rear notch 32b intended to receive respectively the front rod 17 and the rear rod 18 of the floor 4 of the vehicle . Furthermore, this reinforcing plate 32 also has at its rear part a protruding element 33 intended to be housed in a recess 12a of complementary shape formed in the vertical and transverse flap of the anchoring fork 9. In the case the use of the reinforcing plate 32, the two pivot axes 13 and 14 are also elongated so that said pivot axes 13 and 14 each have an end attached to the anchor fork 9 and another end attached to the Finally, the reinforcing plate 32 may also be provided with through slots 34, 35 so as to make accessible the gripping means 21, 25 of the first and second arms 19, 23.

  This reinforcement plate 32 thus makes it possible to reinforce 35 and to increase the recovery of forces at the level of the pivot axes 13, 14 respectively enabling the base 6 to be pivoted on the one hand, and the arms 19, 23 on the other hand go. In addition, depending on the location planned to dispose of the entire

  front link, the thickness of the arm 19 and thus the holding hook 20 can also be increased so as to locally reinforce the resistance of said holding hook 20 when the latter is subjected to heavy mechanical stresses.

Claims (12)

  1. Device for fixing (5) a seat on a vehicle floor, the fixing device comprising, on the one hand, a base (6) extending between a front end (6a) and a rear end ( 6b), said base (6) being intended to support a seat (2) of the seat, and secondly, front (8) and rear links (7) attached to the base (6), characterized in that the front link (8) comprises: - an anchoring fork (9) which has front (14) and rear (15) notches intended to cooperate respectively with front (17) and rear (18) rods integral with the floor ( 4) when the anchor fork (9) is in an installed position with respect to the floor of the vehicle, - a holding hook (20) movably mounted on the anchor fork (9) between an unlocked position and a locked position wherein said holding hook (20) forms with the rear indentation (15) a closed housing for trapping the ti rearward (18) and maintain the anchor fork (9) in its position installed on the floor, and in that the base (6) is pivotally mounted on the anchor fork (9) around a first pivot axis (13) between, on the one hand, a position of use in which the rear link (7) is adapted to cooperate with means for fixing the floor (4) to maintain the base (6) substantially horizontally, and on the other hand, a position tilted forward in which locking means (16, 24, 27) blocks the pivoting of the base (6) relative to the anchor fork (9).   2. Device according to claim 1, wherein, when the anchoring fork (9) is placed on the floor of the vehicle, the front notch (14) of the anchor fork (9) is adapted to housing the front rod (17) of the floor, and when the anchor fork (9) is in its position installed on the floor of the vehicle, the front (14) and rear (15) notches of the anchor fork (9) ) are respectively adapted to accommodate the front (17) and rear (18) of the floor 3. Device according to either of claims 1 and 2, wherein the holding hook (20) is biased by elastic means (22) to its locked position, and said holding hook (20) has a cam surface (20a) adapted to bear against the rear rod (18) for controlling the displacement of said holding hook (20) to its unlocked position temporarily causing the opening of the closed housing to the imprisonment of the rear shank (18).   4. Device according to claim 3, wherein the holding hook (20) is formed on a first arm (19) pivotally mounted on the anchor fork (9), the elastic means (22) comprising a spring which s' extends between a first end fixed to the first arm (19) and a second end fixed to the anchor fork (9) to allow an elastic return of the holding hook (20) to its locked position.   5. Device according to any one of the preceding claims, wherein the locking means of the pivoting of the base (6) in its forward tilted position comprise: - a third notch (16) made on the fork of anchorage (9) and in which is intended to be housed a pin (27) of the base (6) when said base (6) is in its pivoted position forward, and - a locking hook (24) movably mounted on the anchor fork (9) between an unlocked position and a locked position in which said locking hook (24) forms with the third indentation (16) a closed housing for trapping the pin (27) of the base (6) and maintain said base in its tilted position forward.   6. Device according to claim 5, wherein the locking hook (24) is biased by elastic means (26) to its locked position, and said locking hook (24) has a cam surface (24a), which at contact and pivoting of the pin (27) of the base (6), is adapted to allow the displacement of said locking hook (24) to its unlocked position by temporarily causing the opening of the closed housing until the imprisonment of the pin (27) of the base (6).   7. Device according to claim 6, wherein the locking hook (24) is formed on a second arm (23) pivotally mounted on the anchor fork (9), the elastic means (26) comprising a spring which s' extends between a first end fixed to the second arm (23) and a second end fixed on the anchor fork (9) to allow an elastic return of the locking hook (24) to its locked position.   8. Device according to claims 4 and 7, wherein the holding hook (20) and the locking hook (24) are pivotally mounted on the anchor fork (9) about a second pivot axis (14).   9. Device according to claim 8, wherein the first and second arms (19, 23) each comprise a gripping member (21, 25) to allow the temporary pivoting of the holding hook (20) or the locking hook (24). ) associated with it to its unlocked position.   10.Device according to claim 8, wherein the first and second pivot axes (13, 14) each extend between an end attached to the anchor fork (9) and a end attached to a reinforcing plate (32) integral with said anchor fork (9).   11. Vehicle seat comprising a seat (2) which is mounted on the floor (4) of the vehicle by means of at least one fastening device (5) according to any one of the preceding claims.   12. Motor vehicle comprising a floor (4) provided with a front rod (17) and a rear rod (18) to which is attached a vehicle seat (1) according to claim 11.