FR2815920A1 - Seat belt system, for transformable rear seats in vehicles, consists of mechanism in two parts, which are adjustable laterally, between central and side positions and are fixed to vehicle floor. - Google Patents

Abstract

The bench seat consists of a seat cushion and a back and is fitted with two seat belt mechanisms (15, 31), each of which is mounted so as to slide laterally between a central position and a side position. Each mechanism also has an anchorage device (34, 36) to transfer the load to the floor of the vehicle.

Description

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Seat belt mechanism arrangement for a convertible bench seat of a motor vehicle
The present invention relates to an arrangement of a seat belt mechanism for a convertible bench seat of a motor vehicle, in particular a rear bench seat. By seat belt mechanism is meant the peduncle or locking buckle of the safety buckle, a peduncle which must be anchored to the ground to ensure the recovery of forces in the event of an impact, and which cooperates with a pretensioner.

imposent qu'ils puissent être glissés à travers la banquette aux emplacements appropriés lors du montage ou du démontage, un tel positionnement n'étant pas commode. It is known to make the rear seats of a motor vehicle so that they fold up in the wallet towards the front, in order to free up storage space at the rear, as shown in the document WO9919165. However, this document does not address the issue of seat belts. Generally, the peduncles remain in place, which

require that they can be slid through the seat in the appropriate locations during assembly or disassembly, such positioning is not convenient.

 It is also known to mount the benches slidingly on the vehicle floor to arrange the space between the front and rear benches. However, because of the space taken at the rear by the wheel arches, it is necessary either to limit the width of the bench seat to two places so that it can move back even between the two wheel arches, as shown in the document WO9919165, or else make the rear seat as wide as possible as a seat for three passengers but then limit its rearward travel which is blocked at the wheel arches which encroach on the interior space of the car.

 According to an arrangement which is the subject of a parallel patent application by the Applicant, it is possible to transform a bench seat, in particular rear, with three seats into a two-seat bench to solve the previous problem. But here again there is the problem of seat belts which must be able to be worn in good conditions of comfort and safety both in the two-seater position and in the three-seater position.

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The Applicant has proposed in the unpublished French patent application No. 00-01301 an arrangement of the peduncles of seat belts which allows them to slide laterally between a central position and a position at one third of the width of the seat. To do this, the peduncles are carried by carriages mounted sliding on a crossbar. However, this arrangement is not compatible with the folding of the bench seat in the portfolio.

 The object of the invention is to provide another arrangement of seat belts compatible with a transformation of the seat from two to three places and with the folding of the seat forward.

 The invention achieves its object by means of a bench seat for a motor vehicle, of the type comprising a backrest and a seat, and two seat belt mechanisms each comprising at least one peduncle, characterized in that the two mechanisms are mounted to slide laterally between a central position and a lateral position, each mechanism comprising a device for hooking at will to the vehicle floor.

 Thus, during the transformation of the bench, the user unhooks the hooking device, moves the mechanisms of the belts to the desired position, and hooks the hooking device again to the floor of the vehicle to ensure the resumption of the forces exerted. on the belt mechanisms. In addition, if the seat is folded forward, it suffices to unhook the hooking devices to be able to tilt the seat forward.

 Advantageously, the mechanisms comprise a plate sliding on at least one transverse rod housed in the backrest or at the rear of the backrest.

 Advantageously, the plate supports at its upper part a pretensioner associated with the peduncle.

 Advantageously, the plate supports at its lower part a return of the cable connecting the pretensioner to peduncle.

 Advantageously, the plate supports at its lower part a pivoting lever comprising a hook and constituting the device for hooking to the floor.

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 Advantageously, the hook cooperates with a transverse attachment bar integral with the vehicle floor, advantageously in a transverse cavity.

Advantageously, at least two attachment zones are provided in the floor corresponding to at least two positions of the seat backrest.

Advantageously, the backrest is mounted so as to be able to pass easily from an advanced position to a retracted position, for example by means of supports in the form of articulated parallelograms mounted on the bench seat frame. The backrest has its width reduced by lateral cutouts, downwards, so that it can be placed between the wheel arches.

 Advantageously, the seat is mounted on a frame articulated at the front, and the backrest is pivotally mounted on its supports so that the seat can be folded forward in the portfolio, taking with it all of the seat belt mechanisms. which have been previously removed from the hanging bar.

 Advantageously, the backrest is mounted on lateral frames connected by two parallel transverse rods on which the plates slide, the frames being pivotally mounted on backrest supports (in particular supports in the form of articulated parallelograms) and which can be removably secured to these supports, for example by the cooperation of one of the transverse rods and elastic clamps.

 Advantageously, the seat is made of at least two mobile parts capable of assuming a first position in which the width of the mobile parts forms a seat of a first width and a second position in which the width of the mobile parts forms a seat of a second width, different from the first.

 By mobile parts is meant parts which can be moved manually between the first position and the second position, either because they are completely independent and free, or because they are connected to the seat frame by a mechanism allowing such movement. between the two positions.

 Advantageously, the two parts are substantially rectangular; when they are joined by one of their short side, they form the large width seat, that is to say generally three places;

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quand elles sont accolées par un de leur grand côté, elles forment la banquette de plus petite largeur, c'est-à-dire généralement de deux places. Dans cette position petite largeur, l'assise peut prendre place entre les passages latéraux de roue, et l'assise peut donc être reculée plus loin que dans les agencements traditionnels.

when they are joined by one of their long side, they form the smaller width seat, that is to say generally two places. In this small width position, the seat can take place between the lateral wheel arches, and the seat can therefore be moved further back than in traditional arrangements.

 The invention will be better understood and other characteristics and advantages of the invention will be highlighted with the aid of the description which follows, with reference to the appended schematic drawings showing an embodiment of the bench seat according to the invention.

vers l'arrière, La figure 6 montre en perspective de trois-quarts avant la banquette en position intermédiaire de transformation, avec son dossier reculé vers l'arrière et son assise en cours de pivotement, La figure 7 montre en perspective de trois-quarts avant la banquette en position finale de transformation, avec son dossier reculé vers l'arrière, et son assise pour deux places La figure 8 montre en perspective de trois-quarts avant le châssis de la banquette et le mécanisme des ceintures de sécurité, lorsque la banquette est en position avancée, pour trois places, La figure 9 montre en perspective de trois-quarts avant le châssis de la banquette et le mécanisme des ceintures de sécurité, lorsque la banquette est en position reculée, pour deux places, FIG. 1 shows a three-quarter perspective view of a rear bench seat of a motor vehicle according to the invention, in the advanced position of a three-seat seat,
FIG. 2 shows a three-quarter rear perspective of the bench seat in the advanced position with its back folded forward,
FIG. 3 shows a three-quarter rear perspective of the bench seat in the advanced position with its back and seat folded forward in the portfolio,
FIG. 4 is a side view showing the various positions of the bench seat in FIGS. 2 and 3,
Figure 5 shows in perspective three-quarters before the bench in the intermediate transformation position, with its backrest

backwards, Figure 6 shows in perspective three-quarters before the bench in the intermediate transformation position, with its backrest moved backwards and its seat during pivoting, Figure 7 shows in perspective three-quarters before the seat in the final transformation position, with its backrest moved backwards, and its seat for two seats Figure 8 shows in perspective three-quarters before the seat frame and the seat belt mechanism, when the bench seat is in advanced position, for three seats, FIG. 9 shows in perspective three-quarters before the chassis of the bench seat and the seat belt mechanism, when the bench seat is in the retracted position, for two seats,

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FIG. 10 shows a three-quarter rear perspective view of the seat frame and the seat belt mechanism, when the seat is in the retracted position, for two seats,
FIG. 11 is a detail view of three-quarters rear left of the mechanism of FIG. 10,
FIG. 12 is a detail view from the right rear three-quarters of the attachment portion of the mechanism of FIG. 10.

 The rear bench seat 1 is intended to be installed in the passenger compartment behind a bench seat or front seats 2, at a place where the rear wheel arches 3 form a lateral projection projecting into the passenger compartment and reducing the width available to it level. The bench seat 1 consists of a seat 4 in two symmetrical parts 4a, 4b and a single backrest 5.

 The seat 4 rests on the front part of a tilting chassis 6 resting itself on the floor of the vehicle. The backrest 5 is held on parallel double lateral arms 7, 7 'forming parallelograms articulated on the rear sides of the chassis 6 in an articulation block 8 possibly including front and rear angular stops. The backrest 5 is mounted on lateral triangular frames 20 (cf. FIGS. 8 below) connected to their base by two parallel rods or axes 10 and 11 connected by spacers 38 placed substantially at one third of the width.

The axis 11 is engaged, when the backrest 5 is in the high position, in elastic clamps 9 secured to the frame 20 at its base. The axis 10 crosses the frame 20 and pivots in the ends of the front arms 7. As a result, the backrest 5 can be joined or detached from the rear arms 7 ′ thanks to the cooperation of the axis 11 of the backrest and elastic clips 9.

When attached to it, the backrest 5 can move parallel to itself at the same time as the arms 7, 7 'pivot in their articulations of the block 8, for example to pass from the advanced position of FIG. 1 to the retracted position in FIG. 5. When it is separated from it, the backrest 5 can be pivoted about the axis 10, the arms 7, 7 'not moving, for example to pass from the raised position of FIG. 1 to the folded position of FIG. 2. In this folded position, the backrest 5 is partially on the seat 4, and it is then possible to tilt the chassis 6 completely forwards around its pivot axis 12 to cause the

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à la banquette 1 la position en portefeuille l'où elle vient se coller verticalement contre le dossier du siège avant 2.

at the bench seat 1 the position in the wallet where it comes to stick vertically against the back of the front seat 2.

 As can be seen in the figures, the frame 6 is narrower at the rear than at the front, where it is located between the wheel arches 3. Similarly, the backrest 5 has on the bottom of its sides two cutouts 13 allowing it not to interfere with the wheel arches 3, both in its advanced position in FIG. 1 and in its retracted position in FIG. 5.

 The seat 4 is in two rectangular parts 4a, 4b comprising on the one hand at the rear (FIGS. 1 and 5) a notch 14 for the passage of the peduncles 15 of the seat belts and on the other hand, in their large front side 17, a notch 16. The front side 17 includes a bead and / or an anti-submarining bump, intended to come under the thighs of the seated passenger.

 The two parts 4a, 4b are pivotally mounted on the chassis 6 as shown in FIG. 6 so that they can be reconstituted by joining their large front side 17 to form the central part of a new two-seat seat (FIG. 7), narrower than the original three-seater seat, and therefore able to fit between the wheel arches 3. In this position, the beads of the long front sides 17 of the parts 4a, 4b occupy the central part of the new seat, and the notches 16 are joined to form at the rear of the new seat a notch for the passage of the peduncles 15 of the belts which have been refocused for this purpose. The short outer sides 18 of the parts 4a, 4b, also provided with a bead and / or an anti-submarine bump, are now at the front of the seat with two places.

 The pivoting of the two parts 4a, 4b can be guided by a mechanism comprising a curved slide 21 (cf. in particular FIG. 4) connecting the sides of the chassis 6 to a rear spacer 22 of said chassis. A pawn not shown (or several pawns) located on the lower surface of the parts 4a, 4b is guided in the slide and allows correct positioning or at least to guide the two parts in one position or the other. The pins and the slides 21 can be shaped so that the pins are held captive in the slides and do not allow untimely removal of the seat parts 4a, 4b.

 We will now describe, essentially with reference to Figures 8 to 11, the seat belt mechanism associated with the seat

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 the invention, this mechanism having to allow the passage from a three-seater seat to a two-seater seat and also allow the rear seat to be moved and its portfolio folded forward.

 The seat belt mechanisms are mounted in lateral sliding on two parallel plates 30 having holes for passage of the rods 10 and 11. These plates 30 support at their upper part the pretensioners 31, oriented parallel to the frames 20 and housed in the backrest 5 itself or at the back of it. The plates 30 form an elongated part downwards where they have on one side a return 32 intended to return the cable 33 coming from the pretensioners 31 to the peduncles 15 of the seat belts and on the other side a flat bent lever of hooking 34 pivoting by its elbow on the bottom of the plate 30. The lever 34 comprises an operating handle part 35 and a hook end 36.

 The vehicle floor has two front and rear cavities 40 and 40 ', transversely elongated and located in the central part of the floor at the level of either of the forward and backward positions of the backrest 5.

These cavities 40, 40 ′ comprise a transverse hooking bar 41, 41 ′ (shown only in FIG. 4) on which the hook 36 of the levers 34 can be engaged when the backrest 5 is in the raised, advanced or retracted position, of so that the backrest is securely fastened to the floor and that the seat belts are secured.

 When changing the position of the backrest 5 from an advanced or backward position to the other, the user first unhooks the hooks 36 of the hanging bar 41 or 41 ′, moves the entire backrest 5 which pivots parallel to itself on the arms 7,7 ′, laterally slides the plates 30 (and therefore all of the pretensioners 31 and peduncles 15) towards their central position or towards their lateral position near the spacers 38, and hooks again the hooks 36 on the bar 41 ′ or 41 of the other cavity 40 or 40 ′. It then suffices to reposition the seat 4 as previously explained to complete the transformation of the seat.

 The movement of the loops can be controlled by the pivoting of the seat (during the transformation).

Claims (14)

 1. Bench for motor vehicle, of the type comprising a backrest (5) and a seat (4), and two mechanisms (15,31) of seat belt each comprising at least one peduncle (15), characterized in that the two mechanisms (15,31) are slidably mounted laterally between a central position and a lateral position, each mechanism comprising an attachment device (34,36) at will to the vehicle floor. 2. Bench according to claim 1, characterized in that the mechanisms (15,31) comprise a plate (30) sliding on at least one transverse rod (10,11) housed in the backrest or at the rear of the backrest (5 ). 3. Bench according to claim 2, characterized in that the plate (30) supports at its upper part a pretensioner (31). 4. Seat according to any one of claims 2 or 3, characterized in that the plate (30) supports at its lower part a return (32) of the cable (33) connecting the pretensioner (31) to the peduncle (15). 5. Bench according to any one of claims 2 to 4, characterized in that the plate (30) supports at its lower part a pivoting lever (34) comprising a hook (36) and constituting the device for hooking to the floor. 6. Seat according to claim 5, characterized in that the hook (36) cooperates with a transverse hooking bar (41,41 ') secured to the vehicle floor, advantageously in a transverse cavity (40,40'). 7. Bench according to any one of claims 1 to 6, characterized in that there is provided at least two attachment zones in the floor corresponding to at least two positions of the back of the bench. <Desc / Clms Page number 9> 8. Seat according to any one of claims 1 to 7, characterized in that the backrest (5) is mounted so as to be able to pass from an advanced position to a retracted position, and vice versa. 9. Bench according to claim 8, characterized in that the backrest (5) is mounted on supports (7,7 ') in the form of articulated parallelograms mounted on the frame (6) of the bench. 10. Bench according to claim 9, characterized in that the backrest (5) has its width reduced by lateral cutouts (13), downwards, so as to be able to be placed between the wheel arches (3). 11) on which the mechanisms (15,31) slide, the frames (20) being pivotally mounted on back supports (7,7 ').  11. Bench according to any one of claims 9 or 10, characterized in that the bench (1) is mounted on a frame (6) articulated at the front, and the backrest (5) is pivotally mounted on its supports ( 7.7 ') so that the bench seat (1) can be folded forward in the wallet 12. bench seat according to any one of claims 1 to 11, characterized in that the backrest (5) is mounted on lateral frames (20) connected by two parallel transverse rods (10, 13. Bench according to claim 12, characterized in that the frames (20) can be secured removably on these supports (7,7 '), by the cooperation of one (11) of the transverse rods and elastic clamps (9). 14. Bench according to any one of claims 1 to 13, characterized in that the seat (4) is made of at least two mobile parts (4a, 4b) capable of assuming a first position in which the width of the mobile parts (4a, 4b) forms a seat of a first width and a second position in which the width of the movable parts forms a seat of a second width, different from the first.