WO1999012763A1

WO1999012763A1 - Folding seat

Info

Publication number: WO1999012763A1
Application number: PCT/EP1998/005788
Authority: WO
Inventors: Johann Werner Graf
Original assignee: Biese, Gabriela-Maria
Priority date: 1997-09-11
Filing date: 1998-09-10
Publication date: 1999-03-18
Also published as: DE19739967A1

Abstract

Disclosed is a folding seat for a vehicle, presenting a seating part (30) with a seating surface (35), a seat back (27) with a supporting surface (36) and a hinge system (1) with hinges mounted on the seat frame (26) to enable the seat back (27) to move from a seating position with a virtually vertical seat back (27) to a reclining position in which the seat back touches with its upper edge (28) the front edge (29) of the seating part (30), the seating surface (35) and the supporting surface (36), which feature together the surface for the reclining position.

Description

Seat bench for a motor vehicle

description

The invention relates to a reclining bench according to the preamble of patent claim 1.

Such a seat bench has a seat part having a seat surface, a backrest having a backrest surface and an articulated mechanism articulated on a seat base frame for movement of the backrest between an essentially upright, i.e. vertical or opposite to the vertical sitting position inclined at an acute angle into a substantially horizontal lying position, in which the seat surface and the back surface are aligned with each other to form a lying surface. Furthermore, the backrest can be returned from the lying position to the sitting position with the aid of the articulated mechanism.

Such a bench is particularly suitable for installation in a minibus or in a VAN vehicle. With the help of the articulated mechanism, the seat can be easily converted into a lying surface, which can optionally be extended by a rear support provided in the rear of the vehicle.

The object of the invention is to provide a seat bench of the type mentioned, with which the seat back can be moved back and forth between the sitting position and the lying position in a space-saving and simple manner.

According to the invention, this object is achieved by the characterizing features of patent claim 1. The invention provides an articulated mechanism with which the backrest can be moved into a lying position in front of the seat, in particular the seat part of the seat, the upper edge of the backrest resting against a front edge of the seat part. In the lying position, the backrest surface is approximately in the same plane as the seat surface of the seat part of the bench. In order to simplify the movement between the sitting position and the lying position, the backrest is pivotally mounted during the movement between these two positions, at least on a deflecting arm pivotably mounted on the seat base frame. A deflecting arm is preferably provided on both sides of the reclining bench. Two pivot points are provided on the respective deflection arm. One pivot point forms the pivot bearing of the deflection arm on the seat base frame, and the other pivot point, which is preferably provided at the free end of the deflection arm, forms the pivot bearing of the backrest during the movement between the two positions, namely the sitting position and the lying position. In the two positions, ie in the sitting position and in the lying position, the seat back is supported and locked on the deflection arm. The support is preferably in at least two support points in the respective position (sitting position, lying position). For this purpose, separate locking devices can be provided. However, a common locking device, in particular in the form of a pivotable locking lever, is preferably used, with which the backrest is locked in both positions on the deflection arm.

As a result, the backrest can be simply pivoted into the two positions (sitting position, lying position) without having to adjust the seat base in the vehicle in the longitudinal direction. The seat underframe with the seat part attached to it can remain stationary in the vehicle. Furthermore, this makes it possible for the backrest to be accommodated in the lying position in a space between a further front seat bench and the seat bench arranged behind it. It is therefore possible to accommodate the backrest in the lying position in an eight-person vehicle, in particular a bus or VAN vehicle, in the footwell of the rear bench designed as a seat bench. If the front seat is designed as a two-seat bench or is replaced by two seats, there is a passage in the vehicle from the two front seats (driver's seat, front passenger's seat) to the seat bench. In the sitting position, the deflecting arm is preferably additionally supported on a stop which is rigidly connected to the seat base frame. This results in a secure arrangement of the backrest, which is locked in the sitting position on the deflection arm, in the motor vehicle in the sitting position of the backrest.

In the lying position, the deflection arm can also be supported on the vehicle floor. This can be done with the help of a support foot, which is preferably pivotably articulated at the free end of the deflection arm. In the sitting position, the support leg is in a hidden position, in particular essentially perpendicular to the deflecting arm or in another suitable position, and preferably swivels automatically from this position, in particular by gravity, when the deflecting arm is pivoted into the lying position. In this way, the backrest is securely supported via the deflection arm and the support foot on the vehicle floor. Securing against tilting of the seat back in the lying position can be prevented by the locking mechanism already mentioned.

Based on the figures, the invention is explained in more detail using an exemplary embodiment. It shows:

Fig. 1: a side view of the embodiment in the sitting position;

2: a side view of the embodiment in the lying position; and

Fig. 3: the embodiment in the sitting position in rear view.

In the figures, an embodiment of a seat bench is shown. The seat bench has a seat underframe 26 which is attached to the vehicle floor 31. The seat base frame can be designed in a known manner. However, it is preferably designed in the manner described in German Utility Model 297 15 473.7 and DE 197 20 207 A1. A seat part 30 with a seat surface 35 is fastened to the seat base frame 26. There is also a backrest 27 with a backrest surface 36 on the reclining bench. In the sitting position (FIG. 1) it extends the backrest 27 is essentially in an upright position, in which it can be inclined at an acute angle with respect to the vertical. In the lying position (FIG. 2), the back surface 36 of the backrest 27 and the seat 35 of the seat part 30 are in a horizontal arrangement approximately in the same plane. They form a continuous lying surface, as can be seen in particular from FIG. 2.

In order to move the backrest 27 between these two positions (sitting position, lying position), a joint mechanism 1 is provided.

The articulation mechanism 1 has a deflection arm 3 which is pivotably mounted on the seat base frame 26 at a pivot point 6. The pivot point 6 is located at one end of the deflection arm. At the other free end of the deflection arm there is a further pivot point 8, at which the backrest 27 is pivotally mounted on the deflection arm 3 during its movement between the two positions (sitting position, lying position). For the pivotable mounting in the second pivot point 8, an elongated support element 5 is rigidly attached to a backrest frame part 4. The dimensions of the support element 5 are dimensioned such that in the lying position (FIG. 2) the top edge 28 of the backrest 27 lies on or in the immediate vicinity of the front edge 29 of the support part 3 and the back surface 36 with the seat surface 35 to form a lying surface in is essentially aligned in one plane. The support element 5 and the second pivot point 8 thus form a support point of the backrest 27 on the deflection arm 3 in the lying position shown in FIG. 2.

A stop 25 is also provided on the deflection arm 3, which forms a further support point for the backrest 27 in the lying position (FIG. 2). The backrest 27 rests on the support surface or support surface formed by the stop 25 with its rear side. In this way, support for the backrest 27 in the lying position on the deflection arm 3 is created at two spaced apart support points. In order to secure the backrest 27 against tipping, a lock is provided in the form of a locking lever 9. The locking lever 9 is pivotally mounted about an axis 37 on the deflection arm 3. In Fig. 2 the locking lever 9 is shown in its pivoted down position. When panning upwards, the arrest Animal lever 9 with a corresponding locking recess 38 in a locking bolt 24 which is attached to the backrest frame part 4. This creates a further support point for the backrest 27 on the deflection arm 3 in the lying position. Furthermore, the backrest 27 is secured against pivoting about the pivot point 8.

At least one support foot 10 is provided to support the deflection arm 3 in the lying position. In the illustrated embodiment, two support feet 10 (Fig. 3) are shown. The support feet are pivotable in the area of the front free ends. For this purpose, the support feet 10 can be articulated in pivot axes 40 on a connecting rod 39 with which the two free ends of the deflection arms 3 are connected to one another on both sides of the seat bench, as can be seen from FIG. 3. From this Fig. 3 it can also be seen that on both sides of the seat bench joint mechanisms, as shown in Figures 1 and 2 for a bench side, are provided. The joint movement of the deflection arms 3 is ensured by the connecting rod 39. When pivoting the deflection arms 3 from the sitting position (FIG. 1) into the lying position (FIG. 2), the support feet 10 are automatically pivoted from their hidden position (FIGS. 1 and 3) into the support position (FIG. 2), in particular by the influence of gravity. It is of course also possible to hold the support feet 10 in the sitting position with the aid of a locking device and to release this locking device when pivoting into the lying position.

In this way, the deflection arm 3 is supported in the lying position at the first pivot point 6 and in the region of the second pivot point 8. The deflection arm 3 is at the first pivot point 6 via the seat base frame 26 and at the second pivot point 8 via the respective support leg 10 supported on the vehicle floor 31. This creates a stable support for the backrest 27 in its lying position.

As can be seen from FIG. 2, the backrest 2 is in the lying position in a space 33 between the front edge 29 of the seat part 30 and a rear side 34 of a bench arranged in front of it in the vehicle. The rear side 34 can also be the rear side of an individual seat or two individual seats arranged at a distance from one another. In normal driving operation, ie when the backrest 27 is in its seat Position (Fig. 1), the room 33 forms the footwell for the vehicle occupants who are sitting on the bench.

In the rear area of the vehicle there is a rear support which is pivotally supported by a cantilever arm 13 on the lower seat part 26 and which can form a base for a mattress for expanding the lying surface, as can be seen from FIG. 2. The rear support 2 is formed by a bearing frame 11. Support feet 12 for supporting the bearing frame 11 are pivotally provided on the bearing frame. As can be seen in particular from FIG. 3, a grid or net 21 can be spanned on the bearing frame 11 to form the mattress base 2. The bearing frame 11 can be pivoted from a substantially vertical position (FIG. 1) into the horizontal position shown in FIG. 2 with the support legs 12 extended about pivot points 19 on the cantilever arms 13 provided on both sides. On the front, the bearing frame 11 is supported on the vehicle floor 31 via the cantilever arms 13 and the seat base frame 26 and on the rear via the support feet 12.

1, the backrest 27 is arranged in the sitting position. In this position, the deflection arm 3 is inclined backwards. In this position it can be swiveled backwards from its front horizontal position (lying position). A stop 18, which is provided on both sides of the seat reclining bench, serves as additional support on the seat base frame 26. The respective stop 18 serves for an additional support point for the deflection arm 3 on the seat frame 26. Furthermore, a lock in the form of a locking lever 16 can be provided. The locking lever 16 is biased by a spring 17 into the locking position, which is shown in Fig. 1. A locking hook 24 is provided on the locking lever 16, which engages with a locking bolt 23 which is fastened to the deflection arm 3. In this way, the deflection arm 3 is held securely in the sitting position. A limit stop 15 can be provided to limit the pivoting movement of the locking lever 16 in the biasing direction. The limit stop 15 and the locking lever 16 can be arranged on a fastening strip 14 which is rigidly connected to the seat base frame 26. The cantilever 13 can also be supported on the fastening strip 14. The two locking levers 16 can be connected to one another by a connecting tube 20 (FIG. 3). In the sitting position (FIG. 1), the backrest 27 is supported at the second pivot point 8 via the support element 5 and the locking lever 9, which engages on a locking bolt 7. The locking bolt 7 is provided on a locking support 32 rigidly connected to the backrest frame part 4. The locking created in this way also creates a second support point for the backrest 27 on the deflection arm 3 in addition to the pivot point 8.

In order to move the backrest 27 from the sitting position shown in FIG. 1 to the lying position shown in FIG. 2, the locking levers 9 and 16 are first released so that the deflection arm 3 together about the first pivot point 6 on the seat base frame 26 can be pivoted with the seat back 27. Furthermore, by releasing the locking lever 9, the backrest 27 can be pivoted about the second pivot point 8 on the deflection arm 3, so that it can be brought into the lying position shown in FIG. 2. The locking lever 9 can also be released when the lying position is reached or shortly before the backrest 27 is finally pivoted into the lying position. Even when moving back into the sitting position, the backrest 27 can remain locked on the deflection arm 3 and can be pivoted about the pivot point 8 into the end position when the sitting position is reached or shortly before.

The locking lever 9, which is pivotally mounted on the deflection arm 3 about the axis 37, forms a locking mechanism both in the sitting position (FIG. 1) and in the lying position (FIG. 2), around the backrest 27 in the desired position on the deflection arm 3 to lock and support. In the sitting position (FIG. 1), the locking lever 9 engages with the locking recess 38 on the locking bolt 7, and in the lying position (FIG. 2) the locking lever 9 engages with the locking recess 38 on the locking bolt 24. Both locking bolts 7 and 24 are rigidly connected to the backrest frame part 4.

Claims

claims

1. Seat reclining bench for a motor vehicle with a seat part having a seat surface, a backrest having a backrest surface and with an articulated mechanism which is articulated on a seat base frame for moving the backrest between an essentially upright sitting position and an essentially horizontal lying position, in which The seat and backrest are aligned with each other to form a lying surface,

characterized

that the articulation mechanism (1) has at least one deflection arm (3) pivotably mounted on the seat base frame (26), on which the backrest (27) is pivotably mounted during the movement between the sitting position and the lying position in such a way that the backrest (27) with its upper edge (28) on a front edge (29) of the seat part (30).

Lying bench according to claim 1, characterized in that the backrest (27) is supported both in the sitting position and in the lying position on the deflecting arm (3) in each case at least at two support points which are arranged at a distance from one another in the longitudinal direction of the deflecting arm (3) .

3. reclining bench according to claim 1 or 2, characterized in that the deflecting arm (3) at one end a first pivot point (6), in which the deflecting arm (3) is pivotally mounted on the seat base (26), and at its free end has a second pivot point (8), in which the backrest (27) is pivotably mounted on the deflection arm (3).

4. Seat bench according to one of claims 1 to 3, characterized in that the deflecting arm (3) is additionally supported on the seat base (27) in the sitting position at a stop (18).

5. Seat bench according to one of claims 1 to 4, characterized in that in the lying position of the deflecting arm (3) is additionally supported on the vehicle floor (31).

6. reclining bench according to claim 5, characterized in that the additional support of the deflecting arm (3) is formed by a support foot (10).

7. reclining bench according to claim 6, characterized in that the support foot (10) during the pivoting movement of the deflecting arm (3) from the sitting position into the lying position in its substantially vertical support position, in particular by gravity, is pivotable.

8. Seat bench according to one of claims 1 to 7, characterized in that one of the two support points, in which the backrest (27) is supported in the lying position on the deflection arm (3), essentially in the region of an upper support point (39) , in which the deflection arm (3) is supported on the support foot (10).

9. reclining bench according to one of claims 1 to 8, characterized in that the backrest (27) via a rigidly connected to her support element (5) is pivotally attached to the deflection arm (3).

10. reclining bench according to one of claims 1 to 9, characterized in that the support element (5) in the second pivot point (8) is pivotally mounted.

11. reclining bench according to one of claims 8 to 10, characterized in that the upper support point (39) is located at the free end of the deflection arm (3).

12. reclining bench according to one of claims 1 to 11, characterized in that the second pivot point (8) forms one of the two support points of the backrest (27) on the deflection arm (3) both in the sitting position and in the lying position.

13. Seat bench according to one of claims 1 to 12, characterized in that by means of a locking element (9) the backrest (27) can be secured against rotation on the deflection arm (3) both in the sitting position and in the lying position.

14. Seat bench according to one of claims 1 to 13, characterized in that the locking element (9) in the sitting position and / or lying position is part of the second support point of the backrest (27) on the deflection arm (3).

15. Seat bench according to one of claims 1 to 15, characterized in that the locking element (9) is designed as a locking lever on the deflecting arm (3).

16. Seat bench according to one of claims 1 to 15, characterized in that a stop (25) is provided on the deflection arm (3) between the two pivot points (6, 8), which has a further support point for the backrest (27) in the lying position forms.

17. Seat bench according to one of claims 1 to 16, characterized in that the deflecting arm (3) is secured in the sitting position by means of a lock (16, 22, 23) against rotation about the first pivot point (6).

18. Seat recliner according to one of claims 1 to 17, characterized in that the backrest (27) in the Liepspsotion in a room (33) between the front edge (29) of the seat part (30) and a back (34) of a bench or at least one vehicle seat is arranged.