EP0512569A1 - Slatted bed base - Google Patents

Abstract

A slatted bed base has twin leaf spring elements (12), which are injection-moulded from plastics, for the largely independent, large-stroke deflection of the individual slats (14). Provided on the upper sides of the limbs (30) of the spring arms (24, 26) are elevations (116) which form steps and cooperate with lower spring portions (102, 104) of twin rubber springs (84) which can each be pushed onto an adjacent pair of slats in the longitudinal direction of the slats. In this manner, the prestress of the slat bearing can be adjusted locally in a simple and permanent manner. <IMAGE>

Description

The invention relates to a slatted frame according to the preamble of claim 1.

Such a slatted frame is described in EP-OS 0 150 873. The spring element is bent from spring steel. Its one broad spring arm lies essentially flat above the top of the longitudinal bar, the second spring arm is curved in a step-like manner, and between these two spring arms there is a rubber-elastic insert. Bearing caps, in which the lateral ends of the slats are inserted, sit positively in recesses in short spring end sections with an attachment.

Due to this design of the spring element, the two slat ends held by it spring through essentially identically. There is also no elastic tilting of the slats around their longitudinal axes.

The present invention is intended to further develop a slatted frame according to the preamble of claim 1 in such a way that the slats held by a spring element can deflect independently of one another and, moreover, can independently tilt elastically about their longitudinal axis.

This object is achieved according to the invention by a slatted frame according to claim 1.

Advantageous further developments are specified in the subclaims.

The development of the invention according to claim 2 is on the one hand in terms of simple and inexpensive manufacture advantageous. In addition, spring elements molded from plastic work less noisily if they come into contact with themselves or with a frame part or a slat during strong deflection.

The development of the invention according to claim 3 is advantageous in terms of simple and reliable attachment of the slats to the spring elements.

The development of the invention according to claim 4 on the one hand brings an additional soft suspension of the slat ends, on the other hand it is also advantageous in terms of low noise during compression and rebound.

In the case of a slatted frame according to claim 5, there is an additional rubber block suspension when the cap-shaped bearing elements approach the longitudinal frame spar. A hard hit would again be disadvantageous in terms of comfort but also in terms of the development of noise.

In the case of a slatted frame according to claim 6, the slat ends or their bearing elements can practically lie with their end faces in the side face of the frame. In this way, a practically continuous slatted surface is achieved with a double bed.

In a slatted frame according to claim 7, the spring characteristic of the individual slats can be very easily adapted by the user to his needs. The additionally provided stop element does not require any noticeably higher manufacturing costs for the slat bearing.

The development of the invention according to claim 8 is in view of a large spring travel of the spring element of advantage, wherein at the same time the end of the spring arm engages the outer section of the cap-shaped bearing element, the tilt axis for the cap-shaped bearing element receiving a slat end also lies there.

A slatted frame according to claim 9 is characterized by a mechanically particularly simple removal.

With the developments of the invention according to claims 10 and 12, an additional spring component is obtained which is effective in deflecting the slat without requiring additional space.

Here, the developments of the invention according to claims 11 and 13 are advantageous with regard to a simple and secure fixing of the additional tension springs at the end of the slat and with regard to low manufacturing costs.

A slatted base according to claim 14 can be produced simply by pressing the mounting pins of the spring elements into correspondingly spaced receiving bores in the inside of the longitudinal frame members. Additional fasteners such as screws or the like are not required.

With a slatted base according to claim 15 it is ensured that the stiffness of the storage of the slat ends can be adjusted by the user in a manner protected against unintentional changes.

In the case of a slatted frame according to claim 16, it is ensured that the force transmission between the stop element and the associated spring arm does not generate any force in the direction of displacement of the stop element.

The development of the invention according to claim 17 is advantageous with regard to the largest possible adjustment range of the stiffness of the slat bearing.

In the case of a slatted frame according to claim 18, the bending and torsional behavior of the upper legs of the spring arms is not impaired by the elevations which cooperate with the stop elements.

In the case of a slatted frame according to claim 19, the size and geometry of the cavity provided in the lower spring section can be used to easily specify the size of the adjustable additional suspension provided by the stop element.

The development of the invention according to claim 20 is advantageous with regard to a rolling of the stop elements on the upper spring arm legs and thus with regard to good rotatability of the slats about their longitudinal axis. In conjunction with a cavity provided in the lower section of the stop element according to claim 19, there is a further advantage that the lower webs of elastic material specified by the cavity are only subjected to bending and kinking, the longitudinal axis of these webs already being unloaded from the Articulated axis is deflected.

With the development of the invention according to claim 21, a small restoring torque is obtained for the slats in the horizontal rest position.

In a slatted frame according to claim 22, two or more adjacent slats are coupled to a smaller extent via a rubber spring, which in particular also dampens vibrations due to the loss factor of the rubber material results from which the stop elements are made.

According to claim 23, on the one hand, the connecting section can be given essentially the same height as the retaining sections of the stop elements encompassing the slats, which is advantageous in terms of easy handling of the stop elements when adjusting and in terms of easy cleaning, while maintaining the size and geometry of the recesses can specify the strength of the coupling and the vibration damping in the bending section.

A geometry of the connecting section, as specified in claim 24, is advantageous with regard to good damping of rotations of the slats about their longitudinal axis.

With a slatted frame according to claim 25 it is ensured that even a full deflection of the spring elements does not lead to undesirable noise.

The further developments of the invention according to claims 26 and 27 are advantageous with regard to a simple and non-rotatable attachment of the buffer elements on the associated buffer seats.

Figur 1:

eine seitliche Ansicht der Lagerung des Endes einer Latte eines Lattenrostes, teilweise geschnitten;

Figur 2:

eine Aufsicht auf das Federelement der Lattenlagerung nach Figur 1 gesehen von der Rostinnenseite;

Figuren 3 und 4:

zu den Figuren 1 und 2 äquivalente Ansichten, in denen eine abgewandelte Lattenlagerung gezeigt ist;

Figuren 5 und 6:

perspektivische Ansichten abgewandelter Lattenlagerungen;

Figur 7:

eine seitliche Ansicht einer nochmals abgewandelten Lattenlagerung.

Figur 8:

einen transversalen Schnitt durch einen Längsholm eines weiteren Lattenrostes und die benachbarte elastische Lagerung für eines der Lattenenden;

Figur 9:

eine Aufsicht auf den in Figur 8 gezeigten Bereich des Lattenrostes ohne Latten und von diesen getragener Gummifeder;

Figur 10:

eine Aufsicht auf den in den Figuren 8 und 9 gezeigten Teil des Lattenrostes, gesehen von der Rostmittelebene ohne Latten und von diesen getragener Gummifeder;

Figur 11:

eine Stirnansicht eines Pufferelementes des Lattenrostes nach Figur 8;

Figur 12:

eine Aufsicht auf das in Figur 11 gezeigte Pufferelement;

Figur 13:

eine Endansicht einer Zwillings-Gummifeder des Lattenrostes nach Figur 8, gesehen von der Rostmittelebene, in vergrößerten Maßstabe;

Figur 14:

eine Aufsicht auf die Zwillings-Gummifeder nach Figur 13;

Figur 15:

eine Ansicht der in Figur 13 gezeigten Zwillings-Gummifeder von rechts; und

Figur 16:

einen Teilschnitt durch einen Verbindungsabschnitt der Zwillings-Gummifeder längs der vertikalen Mittelebene von Figur 13.

The invention is explained in more detail below on the basis of exemplary embodiments with reference to the drawing. In this show:

Figure 1:

a side view of the storage of the end of a slat of a slatted frame, partially cut;

Figure 2:

a top view of the spring element of the slat bearing according to Figure 1 seen from the inside of the grate;

Figures 3 and 4:

views equivalent to FIGS. 1 and 2, in which a modified slat bearing arrangement is shown;

Figures 5 and 6:

perspective views of modified slat bearings;

Figure 7:

a side view of another modified slat storage.

Figure 8:

a transverse section through a longitudinal spar of another slatted frame and the adjacent elastic mounting for one of the slat ends;

Figure 9:

a plan view of the area of the slatted frame shown in Figure 8 without slats and rubber spring carried by them;

Figure 10:

a plan view of the part of the slatted frame shown in Figures 8 and 9, seen from the central rust plane without slats and rubber spring carried by them;

Figure 11:

an end view of a buffer element of the slatted base according to Figure 8;

Figure 12:

a plan view of the buffer element shown in Figure 11;

Figure 13:

an end view of a twin rubber spring of the slatted base according to Figure 8, seen from the central plane of the rust, on an enlarged scale;

Figure 14:

a view of the twin rubber spring according to Figure 13;

Figure 15:

a view of the twin rubber spring shown in Figure 13 from the right; and

Figure 16:

a partial section through a connecting portion of the twin rubber spring along the vertical central plane of Figure 13.

In Figures 1 and 2, 10 denotes a longitudinal spar of a slatted frame. The longitudinal beam 10 carries slats 14 via a total of 12 spring elements.

The spring elements 12 each have a lower fastening section 16, which has on the outside two mounting pins 18, 20 spaced apart in the longitudinal direction of the bar. The latter engage in blind bores 22 which spring back from the inside of the longitudinal bar 10.

Two spring arms 24, 26 are formed on the fastening section 16, each of which has an essentially V-shaped shape, the tip of the V pointing to the longitudinal center plane of the grate. Each spring arm has a lower leg 28 which rises obliquely upwards and inwards and an upper leg 30 which rises obliquely outwards and upwards. The latter has a more steeply rising end section 32, on which a bearing cap 34 is formed. This has, in the unloaded state, essentially in the horizontal direction and in the longitudinal center plane of the grate open recess 36 into which a rubber-elastic damper cap 38 is inserted in a form-fitting manner. The latter has a recess 40 in which the end of the crossbar 14 sits in a form-fitting manner.

At the ends of the recess 36, downward-running windows 42, 44 are provided, through which an extension 46 of the associated damper cap 38 extends.

The upper side of the longitudinal bar 10 is set at an angle which corresponds to the setting angle of the leg end section 32, as shown at 48.

The spring element 12 is a one-piece plastic injection molded part made of a polyacetal material or another plastic material suitable for long-term suspension.

If the crossbar 14 is loaded exactly vertically, the V-shaped spring arm 24 is compressed, both legs 28 and 30 being loaded, so that the tip of the spring arm also moves downward. Because of the bevel 48 of the longitudinal spar 10, the vertical vertical travel is large with a compact vertical dimension of the grate. With a strong deflection, the shoulders 46 of the damper caps 38 come into contact with the chamfer 48 before the underside of the leg end section 32 strikes the chamfer 48. In this way, end position damping and low noise are obtained.

In the exemplary embodiment according to FIGS. 3 and 4, parts which correspond to the parts already described above functionally are again provided with the same reference numerals. They do not need to be described again in detail below.

In the exemplary embodiment according to FIGS. 3 and 4, the end section 32 of the upper leg 30 of the spring arms 24, 26 is cranked, so that on the one hand no bevel 48 is required on the longitudinal spar 10 and on the other hand the upper leg 30 of the spring arms 24, 26 runs more parallel to the crossbar 14.

A rubber-elastic stop element 50 is slidably clipped onto each leg 30, which on the one hand has spring properties and on the other hand specifies the effective lever arm of the spring arms 24, 26. If the stop element 50 is in the extended position shown in FIG. 3, the slatted bearing has an overall softer spring characteristic. In the position of the stop body 50 shown in broken lines in FIG. 3, the spring characteristic is harder.

If the leg 30 is additionally adjusted somewhat more strongly than shown in FIG. 3, one has a first part of the spring travel, in which the entire spring arm is active, while then only after the stop element 50 comes into contact with the underside of the crossbar 14 a shortened part of the spring arm becomes active, which results in the greater rigidity of the spring element.

In the slat bearing arrangement shown in FIG. 5, the spring arms 24, 26 run straight upwards and inwards. At their free ends, tab-shaped end sections 52, 54 are formed, which overlap the side surfaces of the crossbar 14 with little play. On the end sections 52, 54 bearing journals 56, 58 are formed, which engage in grooves 60, 62, which are provided in the slat side surfaces and extend in the longitudinal direction of the slat.

The slat bearing arrangement according to FIG. 5 is also distinguished by a large spring travel and has a particularly simple mechanical construction.

The slat bearing shown in Figure 6 corresponds to Basic principle of that according to Figure 5, only engage the journals 56, 58 in openings 64, 66, which are provided in the free ends of the legs 68, 70 of a U-shaped rubber spring, generally designated 72. The legs 68, 70 are positioned in lateral grooves 74 of the slats 14 and connected by a base section 76 of the rubber spring 72, which lies over the free end face of the slat 14.

When the slat is deflected, the legs 68, 70 form tension springs, the spring action of which is added to that of the spring arms 24, 26.

A bottom section 78 of the rubber spring 72 drawn over the lower edge of the slat 14 can again form an elastic stop, which comes into engagement with the upper side of the longitudinal bar 10 when the slat is strongly deflected.

The embodiment according to FIG. 7 corresponds in principle to the connection according to FIG. 6 in terms of the interconnection of two spring systems, only the rubber spring loaded under tension has only a single leg 68 which runs along the underside of the crossbar 14. The base section 76 is again designed as a cap, in which a damper cap 38 is inserted.

The free end of the leg 68 is designed as a groove-shaped joint socket 80 and works together with a joint rib 82, which is molded onto the end of a spring arm.

In the exemplary embodiment shown in FIGS. 8 to 16, components which have already been described above are again provided with the same reference symbols.

As can be seen from FIGS. 8 and 9, the upper wall of the bearing cap 34 is thickened in the shape of a cone section towards the inner free end. In practice, the height of this thickening can be approximately 1 mm. In this way it is achieved that slat ends with small manufacturing tolerances in the vertical direction are equally well held firmly in the bearing cap 34.

A total of 84 double rubber spring can be moved on two adjacent slats in the longitudinal direction of the slats. It has two holding sections 86, 88, each of which surround a slat 14 in a light press fit. The holding sections 86, 88 are connected by a bending section 90 which is of substantially the same height as the holding sections 86, 88. As can be seen from FIGS. 13 and 14, two recesses 92 spring back from the two end faces of the rubber spring 84, between which a Web 94 remains. The recesses 92 are provided at the lower end of the bending section 90, so that it receives a narrow lower web 96 and a wider upper web 98. The latter is delimited at the top by an arcuate edge recess 100.

The holding sections 86, 88 can thus be tilted relative to one another about an axis which is perpendicular to the drawing plane of FIG. 13 and which lies in the region of the upper broad web 98. With such a tilt against each other, the middle, vertical web 94 and the lower, horizontal web 98 are subjected to tension in one direction of tilt and pressure in the other direction of tilt. The upper horizontal web 98 serves essentially as a tilting bearing. The two holding sections 86, 88 can also be tilted relative to one another about an axis vertical in FIG. 13 which coincides with the center line.

As can be seen in particular from FIGS. 13 and 15, spring sections 102, 104 hanging downward are formed on the holding sections 86, 88. These are delimited on the outside by two arcuate surfaces 106, 108 and a lower flat surface 110.

Recesses 112 each spring back from the two end faces of the spring sections 102, 104, between which a vertical web 114 remains. The peripheral walls of the recesses 112 run essentially parallel to the surfaces 106 to 110.

The flat lower surfaces 110 of the spring sections 102, 104 work together with elevations 116 which form stairs and are provided in a narrow central region of the transverse dimension of the upper legs 30 of the spring arms 24, 26. The pretensioning of the spring sections 102, 104 can be varied by adjusting the rubber spring 84 in the longitudinal direction of the slat. Here, the upper leg 30 of the spring arms 24, 26 receives a corresponding bias. Because of the step-like design of the elevations 116, it is ensured, even with load alternations, that no force is exerted on the rubber spring 84 in the longitudinal direction of the slats 14, which would lead to an unintentional adjustment of the rubber spring 84.

In practice, the spring element 12 is a one-piece injection molded plastic part made of a polyacetal material or another plastic material suitable for long-term suspension. The twin rubber spring 84 is a one-piece molded rubber part with a Shore hardness of approximately 80.

As can be seen from the drawing, the bearing caps are located 34 of the spring elements 12 over the longitudinal spar 10, so that one obtains a slat reaching to the edge of the grate. This enables a practically continuous slatted surface for a double bed.

In order to ensure that the spring elements 12 bounce noiselessly against the upper side of the longitudinal spar 10, a seat plate 118 is formed on the essentially vertically rising leg end section 32 and has a positioning rib 120 on its upper side. A rubber buffer 122 shown in FIGS. 11 and 12 can be pushed onto the seat plate 118. For this purpose, it has a matching flat pocket 124, in the top wall of which a slot 126 matching the positioning rib 120 is provided. On both sides, the rubber buffers 122 have cylindrical spring sections 128, which ensure a progressive damping of the stop movement before the rubber buffers 122 are unblocked.

Due to the twin rubber springs 84, the hardness of the suspension of the slats can thus be easily adjusted locally by the user, the hardness once set being retained reliably even in continuous operation. Since the twin rubber spring 84 covers two slats, the adjustment work is simplified since it only needs to be carried out for one pair of slats. In spite of this, a locally flexible adjustment of the hardness of the slat bearing is completely flexible enough in practice. Combining two adjustable rubber springs into a single twin rubber spring also has the advantage that it creates a comfortable large contact surface for the hand of the user. Since the measures required to adjust the hardness of the slat bearing on the spring element 12 itself practically do not require any additional manufacturing costs, one and the same spring elements 12 can be used consistently for the Use the entire slatted frame, also for those grate sections in which it is not necessary to adjust the hardness of the slatted bedding.

If desired, the bearing caps 34 can also be provided offset to the outside of the longitudinal spars 10, as shown in broken lines in FIG. You can also provide slats reaching to the edge of the grate on a swiveling subframe, such as the one used e.g. is used on adjustable headboards.

Claims (27)

Slatted frame with a frame which has longitudinal bars (10) connected by transverse bars, with spring elements (12) attached to the longitudinal bars (10), each having a fastening section (16) connected to the longitudinal bar (10), two end sections (32) lying next to one another and a bending section lying between the latter and the fastening section (16), with bearing elements (34; 56, 58; 82), which are each arranged on one of the end sections (32), and with slats (14), the ends of which are each separated by one of the bearing elements (34; 56, 58; 82) are held, characterized in that the bending section of the spring elements (12) is formed in each case by two separate spring arms (24, 26), at the free ends of which one of the end sections (32) is formed is. Slatted base according to claim 1, characterized in that the spring elements (12) are one-piece plastic injection-molded parts. Slatted base according to claim 2, characterized in that the bearing elements (34) are cap-shaped and are molded onto the end sections (32). Slatted frame according to Claim 3, characterized in that rubber-elastic damper caps (38) are inserted into the cap-shaped bearing elements (34), in each of which one of the slat ends is received. Slatted base according to Claim 4, characterized in that the cap-shaped bearing elements (34) are provided with at least one window (42, 44) which is open towards the longitudinal spar (10) and the rubber-elastic damper caps (38) have projections (46) which project through these windows (42, 44) to the longitudinal spar (10) beyond the bearing elements (34). Slatted base according to one of Claims 1 to 5, characterized in that the spring arms (24, 26) are essentially V-shaped, the tip of the V pointing towards the longitudinal center plane of the frame. Slatted base according to claim 6, characterized in that the upper leg (30) of the spring arms (24, 26) each slidably carries a preferably rubber-elastic stop element (50), the tip of which is in contact with the underside of the slat or after a first deflection of the assigned slat ( 14) comes into contact with the bottom of the slats. Slatted base according to Claim 6 or 7, characterized in that the upper leg (30) of the spring arms (24, 26) each has an end section (32) which is more inclined to the horizontal and the upper side of the longitudinal bar (10) corresponding to the inclination of these leg end sections (32 ) is inclined to the horizontal (48). Slatted base according to claim 1 or 2, characterized in that the bearing elements each have two bearing pins (56, 58) which run in lateral grooves (60, 62) of the slats (14). Slatted frame according to Claim 1 or 2, characterized in that the bearing elements each have two bearing pins (56, 58) which engage on inner ends of tension springs (68, 70) running in the longitudinal direction of the slat, the second ends of which are fixed to the slat (14) . Slatted base according to claim 10, characterized in that the tension springs respectively assigned to a slatted end are formed by the legs (68, 70) of a U-shaped rubber-elastic spring element (72), the base section (76) connecting the legs on the end face of the slat (14 ) is supported. Slatted base according to claim 1 or 2, characterized in that the bearing elements are each formed on the end sections (32), transverse bearing ribs (82) which each cooperate with the inner ends of a tension spring (68) running along the underside of the slats, the outer end of which at the Latte (14) is set. Slatted base according to claim 12, characterized in that the tension spring (68) is a rubber spring and a spring seat cap (76) pushed over the end of the slat is molded onto it. Slatted base according to one of claims 2 to 13, characterized in that two mounting pins (18, 20) spaced apart in the longitudinal direction of the bar are injection molded onto the fastening section (16). Slatted base according to one of claims 1 to 6, characterized in that the slats (14) each slidably carry a preferably rubber-elastic stop element (84), the underside of which cooperates with the top of the upper leg (30) of an associated spring arm (24, 26), and that the upper sides of the upper legs (30) of the spring arms (24, 26) are provided with elevations (116) which cooperate with the underside of the respectively assigned stop element (84). Slatted base according to claim 5, characterized in that the elevations (116) each have an upper end face running parallel to the overlying slat section. Slatted base according to claim 6, characterized in that the upper legs (30) of the spring arms (24, 26) rise towards the bearing elements (34) and the elevations (116) together form a staircase. Slatted base according to one of claims 5 to 7, characterized in that the elevations (116) cover only a small, preferably central area of the width of the upper legs (30) of the spring arms (24, 26). Slatted base according to one of Claims 5 to 8, characterized in that a lower spring section (102, 104) of the stop elements (84) is designed as an at least partially hollow (112) part. Slatted base according to claim 9, characterized in that the outer surfaces (106, 108) of the spring sections (102, 104) of the stop elements (84) are curved. Slatted base according to claim 10, characterized in that the deepest section (110) of the outer surface of the lower spring sections (102, 104) of the stop elements (84) is flattened in each case. Slatted base according to one of claims 5 to 11, characterized in that two or more adjacent stop elements (84) are connected via bending sections (90). Slatted base according to Claim 22, characterized in that the bending sections (90) have substantially the same height as the holding sections (86, 88) of the stop elements (84) comprising the slats (14), but are weakened by at least one recess (92). Slatted base according to claim 23, characterized in that the bending section (90) has a wide upper web (98) and a narrow lower web (96). Slatted base according to one of Claims 5 to 24, characterized in that the free ends of the spring arms (24, 26) carry a seat (118) for a buffer element (122), the underside of which can be moved in contact with the upper side of the associated longitudinal bar (10) is. Slatted base according to claim 25, characterized in that the seats (118) are designed as flat plates and the buffer elements (122) have a flat receiving pocket (124) which fits onto the seat (118). Slatted base according to claim 26, characterized by a positive connection (110, 126) between the seat (118) and the buffer element (122) preventing the buffer element (122) from rotating onto the associated seat (118).

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