WO2000051468A1

WO2000051468A1 - Frame for a recliner or seat

Info

Publication number: WO2000051468A1
Application number: PCT/EP2000/001567
Authority: WO
Inventors: Karl Baier
Original assignee: Airlux Ag
Priority date: 1999-03-04
Filing date: 2000-02-25
Publication date: 2000-09-08
Also published as: EP1033096A1; EP1076497A1; AU3424900A; ATE254420T1; DE50004478D1; EP1076497B1

Abstract

According to the invention an upper frame part (6) is mounted in a pivoting manner on both sides by means of pivot bearings (9a) each comprising a first lever (10) which engages the upper frame part at the rear end and a longer lever (11) which engages the frame at the top end in an offset manner and like the first lever (10) is articulated on a longitudinal cross-beam (2a). The upper frame part (6) pivots in such a way that when said upper part is raised it is automatically displaced at the top end. The raising of the upper frame part (6) is supported by a pressure spring element which engages said part from below, consists of a blockable gas spring (22) and a coil spring and is positioned below an adjoining lower frame part (8). The raising of the upper frame part is further supported by the lowering of the front end of the lower frame part (8) which acts on the upper frame part (6) by way of transmitting devices (16a). The transmitting devices each comprise a guide surface (18) whose lower side is convex and which is fixed to the lower side of the lower frame part (8), as well as a roller (20) which is mounted on the end of a protuberance (19) attached to the lower side of the upper frame part (6) and projecting beyond the rear end of same and against which the guide surface (18) pushes.

Description

DESCRIPTION

FRAME FOR A LOUNGE OR SEAT FURNITURE

Technical field

The invention relates to a frame for reclining or seating furniture according to the preamble of claim 1. Such a frame usually forms a basis for an upholstered pad which can be fixedly or removably connected to it or can only be placed on it. The frame can be part of a bed, a couch, a deck chair or the like. be trained.

State of the art

A generic frame is known from DE-A-29 40 364. There, an upper frame part is pivotally anchored in the base frame about a transverse axis which is offset on the head side relative to its rear end. The lower part of the frame is also pivotally anchored in the base frame so that its front end can be lowered. A transmission device is provided on each of the long sides, consisting of a pin attached to the rear end of the upper frame part, which engages in a substantially horizontal slot at the rear end of the lower frame part that is bent slightly upward at the head end. A lowering of the latter thus causes the upper part of the frame to be erected via the transmission device, that is to say a pivoting, in the case of which the head end is raised. The pin slides in the slot against its front end, while the rear end of the upper frame part and the front end of the lower frame part move slightly apart. The erection of the upper part of the frame is supported by a Tension spring, which is anchored to the base frame and engages the upper part of the frame.

The increase in the distance between the upper frame part and the lower frame part is relatively small. As a result, a certain amount of compression of the abdominal area occurs on the user's body, which hinders breathing and is often perceived as uncomfortable or even oppressive. If a thicker pad is used, this is also squeezed, which can lead to damage in the long run and complicates the erection of the upper frame part. In addition, the support of the erection by a short tension spring, the force of which quickly decreases when the elastic stretch is reduced, is in many cases not enough for a comfortable changeover.

From DE-A-27 49 152 a pivot bearing of an upper frame part is known by means of two levers of different lengths, which are articulated offset on a base frame and act on the upper frame part, in which an erection of the upper frame part with a sufficient increase in the distance between its rear end and the front end of a subsequent lower part of the frame is guaranteed, but there is no support for raising the upper part of the frame by lowering the lower part of the frame. Under these circumstances, the tension springs used should in turn not be sufficient for a comfortable erection of the upper frame part.

AT-B-401 604 shows a lounger in which a frame upper part is in turn pivotally anchored in a base frame about a transverse axis offset at the head end relative to its rear end. His rear end is with that

Front end of a lower frame part pivotally connected is pivoted at the foot end and at the same time longitudinally displaceable in the base frame. To support the erection of the upper frame part, a gas pressure spring is provided which engages on an extension attached to the underside of the upper frame part, which protrudes beyond the rear end and is supported on the base frame, for example in the region of the foot end of the lower frame part. With this couch the support of the erection of the upper part of the frame should be sufficient, but the body of the user is in turn subjected to a compression of the abdomen.

Presentation of the invention

In contrast, the invention has for its object to design a generic frame so that the body of the user is not exposed to any uncomfortable loads, especially compressions. Despite the more complex guidance of the upper frame part, which is necessary for this purpose, the user should be able to erect the upper frame part in a manner that is comfortable for the user, if possible without external energy supply. For this purpose, the erection of the upper frame part must be helped by simultaneously lowering the lower frame part, which acts on the former via a suitable transmission device. In addition, support by a suitable and suitably used spring element is required.

The object of the invention is solved by the features in the characterizing part of claim 1. The invention provides a frame for a piece of reclining or seating furniture in which the erection of the upper frame part is comfortable and easy to do in every respect and the user does not Is exposed to loads of any kind. This applies largely regardless of weight and height.

Brief description of the drawings

The invention is explained in more detail below with reference to drawings, which only show exemplary embodiments. Show it

1 is a side view of a frame according to the invention in a basic position,

2 is a bottom view of the frame according to the invention, also in the basic position,

3 is a side view of the frame with the upper part of the frame erected,

4a is an enlarged detail from FIG. 1,

4b a detail corresponding to FIG. 4a with the frame top part partially erected, FIG.

4c a section corresponding to FIG. 4a with the upper part of the frame erected as in FIG. 3, FIG.

5a enlarges a section of a

Side view with modified execution of the upper frame part in the basic position,

5b shows a section corresponding to FIG. 5a with the upper frame part erected, Fig. 6a is a side view of an inventive

Frame according to an extended embodiment in a basic position,

6b is a partial bottom view of the frame according to the invention in accordance with the expanded embodiment, also in the basic position,

Fig. 7a is a side view of an inventive

Frame according to the extended embodiment, with erected upper part of the frame and

Fig. 7b is a partial bottom view of the frame according to the invention according to the expanded embodiment, also with the frame upper part erected.

Ways of Carrying Out the Invention

The frame for a bed shown as an example comprises (FIGS. 1, 2) a base frame 1 with two longitudinal spars 2a, b, which form a square with transverse spars 3a, b arranged on the head and foot sides, which are formed on legs 4a, b, c, d is trimmed. On the head and foot sides, sockets 5a, b are attached to the square, on which a frame upper part 6 rests in the basic position or a foot part 7 is fastened. The foot end of a lower frame part 8 is pivotally connected to the foot part 7 so that its front end, which connects to the rear end of the upper frame part 6, from the basic position, in which it is horizontal, like the upper frame part 6, and with the same and the foot part 7 forms a flat surface for receiving a mattress, can be lowered. The upper frame part 6, the lower frame part 8 and the foot part 7 are each formed as rectangular plates. The upper frame part 6 is connected on both longitudinal sides of the base frame to the same via a pivot bearing 9a or 9b. This is formed in each case by a first lever 10 and a longer second lever 11. The first lever 10 engages one near the rear end of the

Upper frame part 6 lying point of attack 12, where it is pivotally connected to it and is articulated at a pivot point 13 offset on the head side relative to the point of attack 12 on the respective longitudinal spar 2a; b, so that the first lever 10 in the basic position of the upper frame part 6 counteracts somewhat towards the rear the lower frame part 8 is inclined. In the same way, the second lever 11 is connected to the upper frame part 6 and the respective longitudinal spar 2a, b. Its point of engagement 14 at the former is offset on the head side relative to the point of attack 12 of the first lever 10, as is its articulation point 15 with respect to the articulation point 13 of the same. The distance between the articulation points 13, 15 is approximately 2.5 times the distance between the engagement points 12, 14, so that the second lever 11 is inclined much more than the first lever 10 in the basic position. The connecting lines between the engagement points 12 , 14 on the one hand and the articulation points 13, 15 on the other hand are parallel in the basic position, so that they form a crooked trapezoid together with the levers 10, 11.

A transmission device 16a and 16b is also arranged on each of the two longitudinal sides, which transmits the energy obtained when lowering the lower frame part 8 to the upper frame part 6 in such a way that its erection is supported. Each of the

Transmission devices 16a, b comprise (see also FIG. 4a) one attached in the region of its front end to the underside of the lower frame part 8, via its front end projecting guide plate 17, the underside of which forms a downwardly convex guide surface 18 which extends in the longitudinal direction. The guide plate 17 has approximately the shape of a segment of a circle. However, the curvature of the guide surface 18 is somewhat greater at the end region at the foot than at the end region at the head end. As a counterpart to this, an extension 19 is attached to the underside of the upper frame part 6, which projects beyond its rear end. At its end, it carries a rotatably mounted roller 20, which forms a stop which bears against the guide surface 18.

The two extensions are connected by a cross bar 21 (FIG. 2), on which a drive element engages. It is designed as a passive compression spring element and comprises a lockable gas compression spring 22, which is arranged centrally in the longitudinal direction below the lower frame part 8 and extends below the foot part 7, where it is supported on the base frame 1. At the end of the cylinder of the gas pressure spring 22, a shorter coil spring 23 is also attached, which in the basic position is compressed between the cylinder and a joint piece at the end of the piston of the gas pressure spring 22. The compression spring element has a relatively large spring constant in an initial interval that adjoins the basic position and extends up to a swivel angle of the upper part 6 of between 20 ° and 30 °, in particular approximately 25 °, and at larger swivel angles when the coil spring 23 has reached its rest position and only the gas pressure spring 22 is effective, a much smaller one.

The upper frame part 6 carries at its head end a formed as a rectangular plate pivotally articulated head part 24 with an extension 25, on which one The upper frame part 6 supports the centrally located gas pressure spring 26.

The uprighting of the upper frame part 6 from the basic position shown in FIGS. 1, 2 and 4a proceeds as follows: After releasing the locking of the gas pressure spring 22, the spring element consisting of the same and the coil spring 23 exerts a force directed against the head end of the frame Cross bar 21 and thus a torque on the upper frame part 6, which is rotated clockwise with a slight increase in the rear end and displacement at the top. The movement is positively guided by the pivot bearings 9a, b, the levers 10, 11 rotating counterclockwise about their articulation points 13, 15.

The pivoting of the upper frame part 6 corresponds to a rotation about a virtual axis of rotation oriented transversely to the longitudinal direction, which shifts somewhat during the pivoting, but is always approximately in the bisector between the upper frame part 6 and the lower frame part 8 and somewhat above the latter. The average distance of the virtual axis of rotation from the likewise virtual line of intersection of the planes defined by the upper frame part 6 and the lower frame part 8 preferably corresponds to the thickness of any cushion cover plus approximately 10 cm to 20 cm.

The erection of the upper frame part 6 is also significantly supported by the lowering of the front end of the lower frame part 8 and the transmission devices 16a, b, which convert the weight of the lower frame part 8 and, above all, the user of the bed into a torque which causes the pivoting of the upper frame part 6 in a clockwise direction supports. In each case, the guide surface 18 prints on the roller 20 at the end of the extension 19. As can best be seen from FIGS. 4a-c, the position at which the roller 20 touches the guide surface 18 moves from the pivoting of the upper frame part 6 foot end of the latter against its head end, while the front end of the lower frame part 8 lowers.

Due to the convex shape of the guide surface 18, the ratio between the pivoting of the upper frame part 6 and the lowering of the lower frame part 8 at the beginning of the movement, when the roller 20 follows the lowering part of the guide surface 18, is considerably increased, towards the end thereof, when the Role has reached the rising part of the guide surface 18, but weakened. This will u. a. the changing lever ratio and the increasing inclination of the lower frame part 8 taken into account. Since the stop formed by the roller 20 limits the pivoting of the upper frame part 6 only on one side against smaller pivot angles, i.e. only forces its pivoting by a minimum pivot angle, it is always possible to erect the upper frame part 6 independently of the lowering of the lower frame part 8 by external action.

The pivoting of the upper frame part 6 on the one hand and the lowering of the lower frame part 8 and the characteristic curve of the compression spring element on the other hand are coordinated with one another, in particular via the shape of the guide surface 18 of the transmission devices 16a, b, so that the support for the erection of the upper frame part 6 is normally sufficient to accommodate minor tuition of the user to erect his upper body. Conversely, the weight of the upper body is essentially sufficient to raise the upper frame part 6 by lifting the lower frame part 8 and compressing the Swing the compression spring element back into the basic position. In the example shown, the upper frame part 6 can be pivoted over an area which is limited by a maximum angle of 60 ° upwards, but in principle larger maximum angles are also possible. It can be in any intermediate position, e.g. B. in that shown in Fig. 4b, fixed by the gas pressure spring 22 is locked.

The forced guidance of the pivoting of the upper frame part 6 by the pivot bearings 9a, b can be selected by the

Long the lever 10, 11 and the choice of the points of attack 12, 14 and the articulation points 13, 15 modified in a wide range and adjusted to the needs given by the application. It is even possible to provide the levers as replacement parts and z. B. create several suitable pivot points for different lever lengths on the base frame 1.

Likewise, the transmission devices 16a, b can be tailored to the needs. The relationship between the lowering of the

Frame lower part 8, the z. B. can be parameterized by the angle of the same to the horizontal, and the minimum pivoting angle of the upper frame part 6, since it is the ratio between the weight acting on the front end region of the lower frame part 8 and the over

Transfer devices 16a, b determined on the upper frame part 6 torque.

Said relationship can be adjusted over a wide range by the formation of the guide surface 18. It is also conceivable that the guide plates 17 and possibly the

Make extensions 19 interchangeable and so precise To enable adjustment to the needs and wishes of the respective user. Different types with different characteristic curves are also available for the gas pressure spring 22 and the coil spring 23, which can be interchanged. In addition, the effect of the compression spring element can be made adjustable by displaceably creating the support point or the point of application.

The head part 24 can be pivoted upwards by releasing the locking of the gas pressure spring 26 (see FIG. 3) and pivoted back with the head into the basic position in which it forms a flat surface with the frame upper part 6.

However, the head part 24 can also be connected to the upper frame part 6 in such a way that an uprighting thereof

Swiveling up the headboard inevitably entails. For this purpose, a pivoting device acts on the head part 24, which (see FIGS. 5 a, b) is connected to the head end of the frame upper part 6 by hinges 27. It comprises two sub-devices which are symmetrical to one another and engage in the vicinity of the two side edges of the head part 24. Each sub-device comprises a parallelogram-shaped rocker 28 which is mounted on an extension 29 on the underside of the upper frame part 6. It can be pivoted with respect to a pivot point 30 about a horizontal axis. At a pivot point 31, selected from a number of possible pivot points, which on the head side and in the basic position (FIG. 5a) follows a straight line or a slightly convex curve towards the head side, a bumper 32 is articulated on one Approach 25 'attacks on the underside of the head part 24. By choosing the pivot point 31 is the pivot position of the Headboard 24 set in the basic position. On the side of the pivot point 30 opposite the articulation points 31, a pull rod 33 engages, which is articulated somewhat below the point of application 14 on the second lever 11.

If the upper frame part 6 is erected, the angle between the same and the second lever 11 increases. This exerts a pull on the rocker 28 via the pull rod 33, so that the same is pivoted clockwise in relation to the upper frame part 6 as this itself in relation to the base frame 1. The bumper 32 is thereby advanced on the head side and causes the head part 24 to pivot upward relative to the upper frame part 6.

According to an expanded embodiment (FIGS. 6a, b, 7a, b), the base frame 1 is in a rail arrangement 34 (FIGS. 6, 7b) with two parallel rails 35, which are connected by crossbeams 36, 37 at the head and foot ends, longitudinally displaceable, in such a way that the erection of the upper frame part 6 effects a head-side displacement of the base frame 1, so that the head end of the head part 24 adjoining the upper frame part 6 approximately maintains its longitudinal position assumed in the basic position. For this purpose, the feet 4a, b, c, d of the base frame 1 are provided with wheels which run in the rails 35 and a displacement device 38 is provided which connects the base frame 1 to the cross beam 36 on the head side of the rail arrangement.

The displacement device comprises a rotary lever 39 which is rotatably mounted about a vertical axis of rotation 40 which is anchored to a cross strut 41 of the base frame 1. One in the basic position on the foot side

The axis of rotation 40 lying end of the rotary lever 39 is over a first rotary rod 42 connected to the crossbar 21. The connection of the first rotary rod 42 to the end of the rotary lever 39 is designed so that mutual rotation of the two parts is possible via a solid angle sector, for. B. it consists of two interlocking rings. In the same way, the first rotary rod 42 is articulated centrally on the cross rod 21. The opposite end of the rotary lever 39 is connected in the same way via a second rotary rod 43 to the center of said crossbar 36 of the rail arrangement 34. The connection between the upper frame part 6 and the head part 24 is not shown in detail and can be designed as in FIGS. 1, 2 or in accordance with FIGS. 5a, b.

When the upper frame part 6 is erected from the basic position (FIGS. 6a, b), the transverse rod 21 connected to it is displaced on the head side with respect to the basic frame 1 and, via the first rotary rod 42, the end of the rotary lever 39, on which it engages. The rotary lever 39 is thereby rotated counterclockwise about the axis of rotation 40 in the bottom view, as a result of which the opposite end of the rotary lever 39 is shifted on the foot side. Because of the connection of the last-mentioned end to the rail arrangement 34 via the second rotary rod 43, the distance between the axis of rotation 40, which is stationary with respect to the base frame 1, and the head end of the rail arrangement 34 is shortened, so that the base frame 1 moves on the head side.

Although the embodiments described above have proven to be a particularly favorable implementation of the inventive concept, various modifications are of course conceivable. So z. B. a transmission device on

Bottom frame attached stop, be it a roller or a slider, with one with the The upper part of the frame, which is connected to the top guide surface, interacts, the displacement device can be implemented by means of cables instead of by a lever system, etc.

Reference list

1 base frame

2a, b longitudinal spars

3a, b cross bars

4a, b, c, d feet

5a, b supports

6 upper frame part

7 foot section

8 lower frame part

9a, b pivot bearing

10 first lever

11 second lever

12, 14 points of attack

13, 15 articulation points

16a, b transmission devices

17 guide plate

18 guide surface

19 extension

20 roll

21 crossbar

22 gas pressure spring

23 coil spring

24 headboard

25, 25 'approach

26 gas pressure spring

27 hinge

28 seesaw

29 extension

30 pivot point Pivot point

Bumper

pull bar

Rail arrangement

rail

Crossbar

Slider

Rotary lever

Axis of rotation

Cross strut first torsion bar second torsion bar

Claims

PATENT CLAIMS

1. Frame for a couch or seating with one

Base frame (1), a frame upper part (6) arranged on the head side on the base frame (1) with a head end and a rear end, which frame upper part (6) can be erected from a basic position, i. H. is pivotable relative to the base frame (1) while raising the head end, a lower frame part (8) arranged on the foot side of the base frame (1) with a foot end and a front end facing the rear end of the upper frame part (6), which can be lowered from the basic position, the lower frame part (8) acts on the frame upper part (6) via at least one transmission device (16a, 16b) in such a way that its lowering forces it to be erected, characterized in that the frame upper part (6) with the base frame (1) via at least one pivot bearing (9a , 9b), which comprises a shorter first lever (10) which is articulated on the base frame (1) and in the region of the rear end thereof

The upper frame part (6) engages, as well as a longer second lever (11) attached on the head side by the first lever (10), which also engages the upper frame part (6) and is articulated on the head frame offset on the base frame (1), the distance between the articulation points (13 , 15) is greater than that between the points of attack (12, 14) and that the frame comprises a drive element which engages the upper frame part (6) and supports its erection.

2. Frame according to claim 1, characterized in that the articulation points (13, 15) of the first lever (10) and the second lever (11) in the basic position of the Upper frame part (6) are offset on the head side relative to their points of attack (12, 14).

3. Frame according to claim 1 or 2, characterized in that in the basic position of the upper frame part (6) the connecting line between the points of attack (12, 14) of the first lever (10) and the second lever (11) and the connecting line between the articulation points (13, 15) of the same are parallel, so that said lines together with the first lever (10) and the second lever (11) form a trapezoid.

4. Frame according to one of claims 1 to 3, characterized in that between the lower frame part

(8) and the upper frame part (6) effective at least one transmission device (16a, 16b) comprises a guide surface (18) connected to one part and a stop connected to the other part, such that the erection of the upper frame part (6) depends is limited by the lowering of the lower frame part (8) in each case by contact of the stop with a point of the guide surface (18) by a minimum pivoting angle, which increases with increasing lowering.

5. Frame according to claim 4, characterized in that the guide surface (18) is designed such that it increases the change in the minimum pivoting angle depending on the lowering of the front end of the lower frame part at least at small pivoting angles.

6. Frame according to claim 5, characterized in that the guide surface (18) is designed such that the Enlargement of the change in the minimum swivel angle decreases with increasing lowering.

7. Frame according to one of claims 4 to 6, characterized in that the guide surface (18) on the underside of the lower frame part (8) is attached and the stop on an underside of the upper frame part (6) attached extension (19), which protrudes beyond the rear end of the same.

8. Frame according to one of claims 1 to 7, characterized in that the lower frame part (8) is articulated in the region of its foot end.

9. Frame according to one of claims 1 to 8, characterized in that the drive element is designed as a spring element.

10. Frame according to claim 9, characterized in that the spring element within a subsequent to the basic position of the frame upper part (6) subsequent interval of the pivot angle of the same has a higher spring constant than outside of the same.

11. Frame according to claim 10, characterized in that the upper limit of the initial interval is at an angle of rotation of the upper frame part (6) of between 20 ° and 30 °.

12. Frame according to one of claims 9 to 11, characterized in that the spring element is designed as a compression spring element with a lockable gas pressure spring (22).

13. Frame according to claim 12, characterized in that the compression spring element comprises a coil spring (23).

14. Frame according to claim 12 or 13, characterized in that the compression spring element is arranged below the lower frame part (8) and is supported on the base frame (1).

15. Frame according to one of claims 1 to 14, characterized in that the frame upper part (6) carries at its head end a pivotally articulated head part (24) which is operatively connected to a pivoting device such that when the frame upper part (6) is erected Swiveling up the head part (24) occurs opposite it.

16. Frame according to claim 15, characterized in that the pivoting device at least one on

Frame upper part (6) comprises pivotably mounted rocker (28) which, when the frame upper part (6) is erected, is pivoted relative to the same and a bumper (32) articulated on the rocker (28) and engaging on the underside of the head part (24), which thereby is pushed towards the head end.

17. Frame according to claim 16, characterized in that the articulation point (31) of the bumper (32) on the at least one rocker (28) is adjustable.

18. Frame according to claim 16 or 17, characterized in that the pivoting device comprises a pull rod (33) acting on the at least one rocker (28) for pivoting the same.

19. Frame according to claim 18, characterized in that the pull rod (33) is articulated on the second lever (11).

20. Frame according to one of claims 1 to 19, characterized in that it comprises a displacement device (38) which, when the frame upper part (6) is erected, causes a longitudinal displacement of the base frame (1) towards the head end.

21. Frame according to claim 20, characterized in that the displacement device comprises a rotary lever (39) which is rotatably mounted about an axis of rotation (40) anchored on the base frame (1) and a first rotary rod (42) which in the region of the rear end on The upper frame part (6) is articulated and engages on one end of the rotary lever (39) and a second rotary rod (43) which is articulated in the area of the head end and engages on an end of the rotary lever (39) opposite the end.

22. Frame according to claim 21, characterized in that the axis of rotation (40) extends vertically.