EP2620079A1 - Self-closing mechanism for at least two movable furniture parts - Google Patents

Abstract

The retractor has pick spring that is made to act upon mounting tool (5) during extraction of respective pull-out furniture portion (1) from associated cam (2) between base position corresponding to mounting tool in inserted state of the extendible furniture portion, and waiting position in which cam during pulling out of pull-out furniture portion is disconnected from mounting tool. Each mounting tool is coupled with and uncoupled from a brake shaft (12) by respective coupling device (30), so that brake shaft rotation is damped by damping device (14).

Description

The invention relates to a retractor for at least two extendable furniture parts, which are extendable from a fully retracted position to a fully extended position in a pull-out of a furniture body and against the pull-out in the furniture body are retractable, comprising for each of the extendable furniture parts a Extracting the pull-out furniture part in the pull-out and when retracting the pull-out furniture against the pull-out shifted driver and for each of the pull-out furniture parts acted upon by a collection spring Einziehhebel, the extension of the respective extendable furniture part of the associated driver between a basic position, the Einziehhebel in the inserted Condition of the pull-out furniture part occupies, and a waiting position in which the driver decouples when pulling the pull-out furniture part of the Einziehhebel to a stationary Schwenkac is pivotable.

Retractable devices (also called self-feeder or retractable mechanisms) for pull-out furniture parts that move automatically when inserting the pull-out furniture part this over a final portion of the Einfahrweges and so ensure the fully retracted state of the pull-out furniture part, are known in different embodiments. For example, goes from the AT 401334 B a feed mechanism out, in which a displaceable against the force of a spring tilting slide is present. The tilting slide is arranged tiltable about a tilting axis on a slide which can be moved in a straight line in the pull-out direction of the drawer against the force of the spring. At the time of the AT 393948 B Known retraction device is also a tilt slide available, which is displaceable along a guideway against the force of a spring. The guideway has a straight portion and a bent portion which the Swiveling the tilting slide about an imaginary tilting axis causes in its tilted end position.

Today retractors are usually equipped with insert dampers to dampen the retraction of the extendable furniture part in the last section of the Einfahrweges. Such a damped retraction device, in which the tilting slide cooperates with a insertion damper, is for example from EP 1 532 892 A1 known. The spring-loaded tilt slide cooperates here with a linear damper in the form of a piston-cylinder unit, which in particular acts pneumatically. Even damped by means of rotary dampers Selbsteinzüge are known.

Other trained in the form of piston-cylinder units damper for damping the retraction of movably mounted furniture parts go for example from the DE 20 2005 020 820 U1 and DE 10 213 726 A1 out. Known are further rotational damper, in which a highly viscous damping medium is arranged in a gap between a fixed damper part and a rotatably mounted damper part. The braking force is caused by this sheared damping medium. Damper of this kind, for example, go from the DE 10 210 917 C1 . US 5,277,282 A . JP 59-222631 A and US 5,143,432 A out.

Furthermore, purely mechanically acting friction damper are known. So go for example from the DE 19 938 626 A1 . DE 201 16 197 U1 and JP 01-266331 A Umschlingungsteile out, which surround an internal friction and form with this a friction pairing. Friction dampers have the disadvantage that the braking force exerted by them is basically independent of speed.

From the DE 10 313 659 B3 . DE 10 214 596 A1 . DE 19 717 937 A1 . AT 503 877 B1 and EP 1 260 159 A2 go out piston-cylinder units in which a forming between the two sides of the piston air pressure difference acts on an elastically deformable piston part, so that the applied friction force of the Air pressure difference and thus depends on the speed of the component to be damped. A vehicle shock absorber, in which a flexibly formed loop part, which bears rubbing against an inner friction part formed by a friction drum, emerges from the DE 601 293 C out. By coupling one end of the belt part with a hydraulically acting damper, the frictional force acting between the belt part and the friction drum can be influenced.

The EP 1 384 420 B1 shows a kinked trained here, about a stationary horizontal pivot axis rotatably mounted Einziehhebel which is acted upon by a collection spring, which is integrated into a damper forming a piston-cylinder unit. At the rear of the extendable furniture part cooperating with the Einziehhebel driver is arranged, which has a slide track. When pulling out the pull-out furniture part of the pull-in lever is pivoted from the driver, starting from a basic position about the pivot axis in a waiting position in which decouples the driver from the Einziehhebel. When pivoting the Einziehhebels from the basic position to the waiting position a dead center of the pull-in spring is run over, so that the Einziehhebel is held by the pull-in spring in the waiting position. When inserting the pull-out furniture part moves a projection of the Einziehhebels in the guide path of the driver, wherein the Einziehhebel coupled to the driver and is pivoted about the dead center of the spring. As a result, the pull-in lever pulls the pull-out furniture part in its fully retracted position. As a pull-out furniture part is in the EP 1 384 420 B1 especially a tall cabinet extension shown. However, it is mentioned that the device can also be used with other extendable furniture parts, for. B. at drawer extensions.

From the GB 1,117,071 shows a locking device, in which a spring-loaded catch part, which is mounted pivotably about an axis, is pivoted by a catch attached to the extendable furniture part between a basic position and the waiting position. The spring is moved over a dead center.

The object of the invention is to provide a retraction device of the type mentioned, in which an efficient damping of the retraction of the extendable furniture parts is provided in a final section of the Einfahrweges. According to the invention, this is achieved by a retraction device having the features of claim 1.

In the pull-in device according to the invention, a pull-in lever is provided for each of the pull-out furniture parts for which the pull-in device is provided, which is a stationary, d. H. relative to the furniture body fixed, pivot axis is pivotable. When pulling out and retracting a respective extendable furniture part with this a driver is moved, which cooperates with the associated Einziehebel. The driver can be fixed in particular on the pull-out furniture part itself. Also, a determination of a pull-out over which the respective extendable furniture part is slidably mounted, is possible. When pulling out a respective extendable furniture part of the retracting lever is pivoted from the driver from the basic position to the waiting position, whereupon the driver decouples from the Einziehhebel. When retracting the pull-out furniture part, the driver coupled to the in-waiting position in his Einziehhebel and pivots in the wake of the Einziehhebel in the direction of its normal position. In an advantageous embodiment, in this case, the pull-in spring cooperating with the pull-in lever is moved over a dead center, whereupon the pull-in spring pulls the pull-in lever further in the direction of its basic position. In another embodiment, it could also be provided that when starting the driver to the Einziehhebel a separate from the catch spring latching of the Einziehhebels is released, whereupon the catch spring pulls the Einziehhebel in the direction of its basic position.

During the pivoting of the retracting lever from its waiting position in the direction of its basic position, a coupling device associated with the respective retracting lever is closed so that the respective retracting lever adjoins a retraction lever all retraction levers are coupled together existing brake shaft. In the further pivoting of the Einziehhebels in the direction of its normal position, the brake shaft is rotated by the Einziehhebel about its axis. Here, the brake shaft is damped by a damping device.

The Einziehhebel are disconnected from the brake shaft at least in their basic positions, d. H. in the basic position of a respective retracting lever, the coupling device assigned to it is opened. Thus, the brake shaft can be rotated by one of the Einziehhebel, while the retracting lever located in the basic position remain in the basic position.

It can be provided that the Einziehhebel are also uncoupled in the waiting position of the brake shaft.

For all extendable furniture parts whose Einziehhebel are coupled via the brake shaft with the central braking device, so a common damping device is present, of which the extendable furniture part is attenuated or braked respectively in the last section of its retraction. The uncoupling of the Einziehhebels of the brake shaft is conveniently only shortly before reaching its normal position, preferably at least after more than 90% of the angle of rotation from the waiting position to the normal position.

Preferably, the damping device has at least one rotary damper, which comprises at least one part driven by the brake shaft during its rotation, which is rotated about the axis of the brake shaft during rotation of the brake shaft to exert a braking force against a retained part.

In an advantageous embodiment of the invention, the damping device has a braking device, in which a viscous damping medium is formed in at least one gap which is formed between a driven damper surface rotatable about an axis of the braking device and a damper surface fixed relative to rotation about the axis is arranged. This, preferably the at least one gap completely filling, damping medium, during rotation of the at least one driven by the movement of the component to be damped damper surface relative to the at least one recorded damper surface causes a speed-dependent braking force of the braking device. The braking force caused by the damping device is thus dependent on the rotational speed of the brake shaft.

Preferably, the damping device comprises first and second brake devices, wherein the first brake device is a mechanically acting brake device and the second brake device is formed in the manner described above. The braking force produced by the second braking device influences, via a coupling between the two braking devices, the braking force of the first, mechanically acting braking device, which could also be referred to as a rotational friction damper. For this purpose, the mutual contact pressure (= pressing force) of the friction surfaces of the friction pairing of the first brake device or of at least one of the friction pairings is changed as a function of the braking force of the second brake device, wherein the contact pressure increases with increasing braking force of the second brake device. By coupling thus acting between the second and the first brake device operative connection is made, directly or via at least one intermediate coupling part. It can thereby be provided a compact, cost-effective damper with an advantageous braking characteristic, wherein the amount of braking force depends on the speed of the component to be damped. A small amount of friction can be achieved.

If the first brake device comprises a plurality of friction pairings, these are preferably all rotatable about the same axis (ie coaxial). Advantageously, furthermore, the axis of the first braking device about which the at least one driven friction surface of the first braking device is rotatable coincides with (coincides with) the axis of the second braking device around which the at least one driven damper surface of the second braking device is rotatable, that is, the at least one driven friction surface of the first brake device and the at least one driven damper surface of the second brake device are thus rotatable about the same axis or coaxial. It is achieved by a simple, compact design.

The friction pairing or at least one of the friction pairings of the first brake device expediently has a sliding friction coefficient of at least 0.2, preferably at least 0.3.

The viscosity of the viscous damping medium of the second braking device is advantageously more than 20,000 Pa s, preferably more than 50,000 Pa s, with values in the range of 100,000 to 1,000,000 Pa s are particularly preferred.

The gap width of the gap or at least one of the gaps, preferably all the gaps, in which or in which the damping medium is arranged, is advantageously in the range of 0.1 mm to 0.5 mm, i. the damping medium has such a layer thickness.

The damping force is caused by the arranged in at least one gap damping medium in that this is loaded on shear. The damping medium having gap or these gaps preferably extend annularly about the axis of the second brake device.

For retaining the damping medium in the gap or in the respective gap, relatively simple seals can be used, if at all. For non-flowable greases, gaskets may be omitted altogether. For flowable oils, seals that prevent the oil from leaking are required, with no high pressures on the seals.

In one possible embodiment of the damping device is a coupling spring between a part of the second brake device or a part rotatably connected thereto and a contrast to the axis of the brake shaft arranged rotatable part, wherein the braking force exerted by the second braking device acts in the sense of a rotation between the two parts interconnected by the coupling spring. It comes thereby, if a damping of the movement of one of the pull-out furniture parts is performed, to a more or less large angular offset between the two connected by the coupling spring parts, depending on the speed of movement of the pull-out furniture part. Cooperating control surfaces adjust the contact pressure of the friction surfaces of the friction pairings or at least one of the friction pairings as a function of this angular offset, or in other words, the cooperating control surfaces convert this angular offset into a contact pressure of the friction surfaces that depends on the angular offset.

The coaxially arranged Einziehhebel, d. H. their pivot axes lie on a common line, are preferably coaxial with the brake shaft, i. it agree the pivot axes of the Einziehhebel and the axis of rotation of the brake shaft.

The opening and closing of the coupling devices is favorably controlled in each case by a link control. This has a co-moving with the Einziehhebel during its pivoting about the pivot axis gate part and a stationary (= corpus held) sliding part.

The retraction springs favorably engage on the one hand on the respective retracting lever and on the other hand on a supporting part extending parallel to the brake shaft, which may for example be rod-shaped or in the form of a profiled rail. Preferably, in this case the stationary link parts are fixed to the support part.

The coupling devices may be formed, for example, in the manner of multi-plate clutches.

By the invention also suitable for heavy duty training is possible. For heavy-duty pull-out furniture parts are provided, of which one, several or all are loaded with more than 150kg.

• Fig. 1 eine Schrägsicht eines Ausführungsbeispiels einer erfindungsgemäßen Einziehvorrichtung im an einem Möbel montierten Zustand, der Möbelkorpus in unterbrochenen Linien angedeutet, wobei eines der ausziehbaren Möbelteile ausgezogen ist und die anderen ausziehbaren Möbelteile sich in ihren vollständig eingefahrenen Stellungen befinden;
• Fig. 2 eine Schrägsicht aus einer gegenüber Fig. 1 unterschiedlichen Blickrichtung ohne die ausziehbaren Möbelteile und den Möbelkorpus;
• Fig. 3 eine im Längsmittelschnitt aufgeschnittene Schrägsicht eines Abschnitts der Bremswelle und der zentralen Dämpfungseinrichtung;
• Fig. 4 und Fig. 5 zwei unterschiedliche Stellungen der Steuerflächen;
• Fig. 6 eine Darstellung entsprechend Fig. 3 aber im explodierten Zustand der Teile;
• Fig. 7 eine Schrägsicht eines einen der Einziehhebel und der mit ihm zusammenwirkenden Teile umfassenden Ausschnitts der Einziehvorrichtung, die Kupplungseinrichtung und die Bremswelle zum Teil mittig aufgeschnitten, im ausgezogenen Zustand des zugehörigen ausziehbaren Möbelteils;
• Fig. 8 eine Darstellung entsprechend Fig. 7 aus einer anderen Blickrichtung;
• Fig. 9 und 10 Darstellungen entsprechend Fig. 7 und 8, aber in einer teilweise eingefahrenen Stellung des ausziehbaren Möbelteils, in welcher sich der Fangarm zwischen der Wartestellung und der Grundstellung befindet und die zugehörige Kupplungseinrichtung geschlossen ist;
• Fig. 11 und 12 Darstellungen entsprechend Fig. 7 und 8, aber in der vollständig eingefahrenen Stellung des zugehörigen ausziehbaren Möbelteils;
• Fig. 13 eine schematische Darstellung zur Erläuterung der Einfahrbewegung des jeweiligen Einziehhebels in die Kulisse des Mitnehmers.

Further advantages and details of the invention are explained below with reference to the accompanying drawings. In this show:

• Fig. 1 an oblique view of an embodiment of a retraction device according to the invention mounted in a furniture state, the furniture body indicated in broken lines, wherein one of the pull-out furniture parts is pulled out and the other extendable furniture parts are in their fully retracted positions;
• Fig. 2 an oblique view from one opposite Fig. 1 different view direction without the pull-out furniture parts and the furniture body;
• Fig. 3 an oblique view of a section of the brake shaft and of the central damping device cut open in the longitudinal center section;
• 4 and FIG. 5 two different positions of the control surfaces;
• Fig. 6 a representation accordingly Fig. 3 but in the exploded condition of the parts;
• Fig. 7 an oblique view of a one of the Einziehhebel and the cooperating parts comprising section of the Einziehvorrichtung, the coupling means and the brake shaft partially cut centrally, in the extended state of the associated pull-out furniture part;
• Fig. 8 a representation accordingly Fig. 7 from another perspective;
• FIGS. 9 and 10 Representations accordingly FIGS. 7 and 8 but in a partially retracted position of the pull-out furniture part in which the tentacle between the standby position and the basic position and the associated coupling device is closed;
• FIGS. 11 and 12 Representations accordingly FIGS. 7 and 8 but in the fully retracted position of the associated pull-out furniture part;
• Fig. 13 a schematic representation for explaining the retraction movement of the respective Einziehhebels in the backdrop of the driver.

An embodiment of a retraction device according to the invention is shown in the figures. The device serves here to form a self-closing device for pull-out furniture parts 1 designed in the form of drawers. A device according to the invention can also be designed as a self-closing device for other types of pull-out furniture parts, e.g. for tall cabinet extensions.

The extendable furniture parts 1 are over an in Fig. 1 pull-out guides not shown in a pull-7 from the furniture body 8 extendable and counter to the pull-7 in the furniture body 8 can be inserted. At the back (relative to the pull-7) of a respective extendable furniture part 1, a driver 2 is attached to this, which has a slide track 3, which can be formed as shown by a passage opening or from a recess. A Einziehhebel 5 of the device has a projection 4 which cooperates with the slide track 3. The projection 4 can be formed as shown by a pin or by a rotatably mounted roller.

The Einziehhebel 5 are each pivotable about the stationary relative to the furniture body 8 pivot axis 6. The formation of realized in the embodiment of the type of pivotable mounting will be explained in more detail below. On the one hand on Einziehhebel 5 and on the other hand on a stationary (= furniture carcass solid) arranged, here rod-shaped, support member 9 engages in each case a catch spring 10.

In the exemplary embodiment, the Einziehhebel 5 are each formed with two arms, wherein the first arm cooperates with the associated driver 2 and the retraction spring 10 engages the second arm. A one-armed training is possible, the retraction spring 10 engages at a position which is further inside (= closer to the pivot axis 6) than the point at which the Einziehhebel 5 with the driver 2 cooperates (in the embodiment on the projection 4th ).

In the retracted state of the associated pull-out furniture part of the Einziehhebel 5 assumes its normal position (see, the upper and lower of the three in Fig. 1 and Fig. 2 illustrated Einziehhebel 5 and the FIGS. 11 and 12 ). When pulling out one of the pull-out furniture parts 1, the associated Einziehhebel 5 is pivoted about the pivot axis 6 in the direction of rotation 11a until it assumes its waiting position (see, the middle Einziehhebel in Fig. 1 and 2 as well as the FIGS. 7 and 8 ). In this position of the Einziehhebels 5, the driver 2 disconnects from the Einziehhebel 5. The pull-out furniture part 1 can be further extended in the sequence until it reaches its fully extended position. When inserting the pull-out furniture part 1 in the direction opposite to the withdrawal direction 7, the driver 2 runs to the retraction lever 5 located in its waiting position. It then follows a mutual coupling of these two parts and a turning back of the Einziehhebels 5 in the opposite direction of rotation 11b about the pivot axis 6 until the Einziehhebel 5 again assumes the basic position and the pull-out furniture part 1 is fully inserted.

In the coupled state of the Einziehhebels 5 with the driver 2, there is a positive connection between these two parts with respect to the pull-7 and the opposite direction of insertion.

When pivoting the Einziehhebels 5 starting from its normal position in the direction of its waiting position, the collection spring 10 is first stretched. Shortly before reaching the waiting position, a dead center of the intake spring 10 is traversed, as a result of which the intake spring 10 is again slightly relaxed (preferably less than one fifth of the preceding compression stroke) until it reaches the waiting position.

If, when inserting the pull-out furniture part of the driver 2 starts at the Einziehhebel 5, the driver 2 pivots the Einziehhebel 5 about its dead center. In the position of the Einziehhebels 5, in which the dead center of the pull-in spring 10 is present, the projection 4 has already run so far into the slide tracks 3, that in another, caused by the pull-in spring 10 Pivoting the Einziehhebels 5 about the pivot axis 6 of the Einziehhebel 5 is positively connected to the driver 2 and the extendable furniture part 1 is pulled by the Einziehhebel 5 by the force of the catch spring 10 until the basic position of the Einziehhebels 5 is reached.

If the pull-in spring 10 can be connected at different distances from the pivot axis 6 with the support member 9 and / or at different distances from the pivot axis 6 with the Einziehhebel 5, the strength of the pull-in force can be changed by different biases of the pull-in spring 10. Also, a continuous variability of the distance from the pivot axis 6, e.g. by an eccentric element, can be provided.

The retraction device has a brake shaft 12, which is rotatably mounted relative to the furniture body 8. For example, on the furniture body 8 bearing parts 13a, 13b be set, between which the brake shaft 12 extends and of which the brake shaft 12 is rotatably mounted about its axis.

In the exemplary embodiment, the rod-shaped support member 9 also extends between the bearing parts 13a, 13b and is held by these corpus fixed and non-rotatable. The support member 9 could for example also be designed in the form of a profile rail. The support part 9 extends parallel to the brake shaft 12.

The pivot axes 6 of the Einziehhebel 5, which lie on a common straight line, in the exemplary embodiment coincide with the axis of the brake shaft 12.

In the exemplary embodiment, the Einziehhebel 5 each have a sleeve-shaped portion through which the brake shaft 12 extends and over which the Einziehhebel 5 are each mounted rotatably about its pivot axis on the brake shaft 12. From this sleeve-shaped portion, the first and second lever arms are radially from.

The Einziehhebel 5 are in each case via a coupling device explained in more detail below to the brake shaft 12 can be coupled and uncoupled from this. In the coupled to the brake shaft 12 state of a respective Einziehhebels 5 this rotates the brake shaft 12 during its pivoting about the pivot axis 6. Thus, the brake shaft 12 is rotated when closing one of the extendable furniture parts 1 in a final section of its retraction in the direction of rotation 26b, said this rotation is braked by a damping device 14.

To form the damping device 14, the trained as a hollow shaft brake shaft 12 is connected to a coaxial shaft portion 15 in the exemplary embodiment, which is also designed as a hollow shaft and an enlarged receiving space 16, in which parts of the damping device are arranged.

In the receiving space 16 of the shaft portion 15 projects in the axial direction of the brake shaft 12 extending detained damper part 58 which is rigidly connected to the stationary bearing part 13b. With a portion of the captured damper part 58 disc-shaped, held friction parts 60 are rotatably connected. For this purpose, this section of the detained damper part 58 seen in cross-section on a deviating from the circular outer contour and the detained friction members 60 have a central passage opening with a corresponding contour.

With the detained friction parts 60 act driven friction members 61 which are rotatably connected to the shaft member 15. For rotationally fixed connection with the shaft part 15, the shaft part 15 has inwardly projecting webs 59 which engage in recesses 61 a on the outer edge of the disk-shaped driven friction parts 61.

The detained and driven friction members 60, 61 are alternately stacked in the manner of a multi-plate clutch. The facing surfaces form retained and driven friction surfaces 17, 18th

The gripped friction members 60 between driven friction members 61 are slidable in the direction of the axis of the brake shaft 12 with respect to the retained damper member 58. The driven friction parts 61 are displaceable in the direction of the axis of the brake shaft 12 relative to the shaft part 15.

A first, mechanically acting braking device thus comprises the retained and driven friction parts 60, 61.

In the receiving space of the shaft part 15 a driven damper part 62 is further arranged. This is driven by the movement of the extensible furniture part 1 to be damped via the brake shaft 12 and the coupling part 64 and is connected via the coupling spring 63 with the coupling part 64, which in turn is rotatably connected to the shaft part 15. For non-rotatable connection with the shaft part 15, the coupling part 64 on the outer edge of an annular federal depressions 64a, in which the webs 59 of the shaft part 15 engage. The coupling member 64 is in this case displaceable in the direction of the axis of the brake shaft 12 relative to the shaft part 15.

A portion of the outer surface of the retained damper portion 58 forms a retained damper surface 20. An inner surface of the driven damper portion 62 forms a driven damper surface 19. In the gap between the driven damper surface 19 and the retained damper surface 20 is a viscous damping medium 21.

A second brake device thus comprises the retained damper part 58, the driven damper part 62 and the damping medium 21 arranged between them.

If no braking force was exerted by the second brake device, the driven damper part 62 would be taken over the coupling spring 63 from the coupling part 64 without changing the angular position between the coupling part 64 and the driven damper part 62. The greater the rotational speed of the brake shaft 12 in the direction of rotation 11 b, but the greater is the braking force caused by the second brake device. This leads to a speed-dependent angular offset against the restoring force of the coupling spring 63 between the rotational position of the driven damper part 62 and the coupling part 64 and thus also with respect to the angular position of the brake shaft 12th

The driven damper part 62 and the coupling part 64 have cooperating control surfaces 65, 66. The control surfaces 65, 66 have a running around the axis of the brake shaft 12, with respect to the axis of the brake shaft 12 increasing profile (thus formed helical surface).

The driven damper part 62 is supported against an axial displacement directed away from the friction parts 60, 61. With increasing angular offset between the driven damper part 62 and the coupling member 64, the coupling member 64 is displaced by the cooperating control surfaces in the axial direction against the friction members 60, 61, wherein the furthest from the coupling member 64 remote friction member (here a detained friction member 60) against an axial Displacement is supported in this direction, for example, by the head of a detent connected to the part 58 retaining pin 67th

With increasing rotational speed of the brake shaft 12 in the direction of rotation 11 b, the driven and retained friction surfaces 17, 18 are thus increasingly pressed against each other, whereby the braking force of the first brake device increases with increasing speed of the brake shaft 12.

The first brake device could also be designed differently than in the manner of a multi-disc brake. For example, a captured friction member 60 be provided, which has a about the axis of the brake shaft 12 extending conical fixed friction surface 18 which cooperates with a conical driven friction surface 17 of the driven friction member 61.

The driven damper part 62 could also be connected via the coupling spring 63 to the shaft part 15, one of the driven friction parts 61 or another part driven by the brake shaft 12.

To cushion load peaks, at least one overload spring could be arranged in the transmission path of the force to be damped from the extensible furniture part 1 to be transferred to the device and to drive the device. For example, the brake shaft 12 could be rotated relative to the shaft part 15 against the restoring force of this overload spring. Another possibility would be, for example, the detained damper part 58 to connect via an overload spring with the bearing part 13b, so that upon occurrence of a load peak, a rotation of the detained damper part 58 relative to the bearing part 13b can be made against the restoring force of the overload spring. The captured damper portion 58 is then held by the overload spring against a continuous rotation about the axis of the brake shaft 12, such that it despite a certain rotation of the retained damper part 58 upon occurrence of a load peak in the course of damping the movement of the component 1 yet to a rotation the driven damper part 62 comes opposite to the captured damper part 58. At least in the stationary state, when a constant equilibrium has been established, the angular position of the retained damper part 58 remains unchanged.

In a modified embodiment, the driven damper part of the second brake device could be rotatably connected to the brake shaft 12 and the detained damper part could be connected via a coupling spring with a rotatably held part, such as a detained friction part. Due to the braking force of the second brake device, when the brake shaft rotates in the direction of rotation 11b, an angular offset occurs between the two both parts connected to one another via the coupling spring, wherein this angular offset is used by means of control surfaces for adjusting the braking force of the first braking device.

As mentioned, the retraction device for each of the Einziehhebel 5 a coupling device 30, in the closed state of the respective Einziehhebel 5 rotatably connected to the brake shaft 12 and in the open state, the brake shaft 12 relative to the Einziehhebel 5 is rotatable.

A respective coupling device 30 has a first coupling part 31, which is non-rotatably connected to the Einziehhebel 5. In the embodiment, the Einziehhebel 5 and the first coupling part 31 are shown integrally formed with each other. Even a multi-part training is possible. Furthermore, a respective coupling device 30 has a second coupling part 32 which is non-rotatably and axially non-displaceably connected to the brake shaft 12, for example via a screw connection not shown in the figures.

The first coupling part 31 has a sleeve-shaped section into which a collar of the second coupling part 32 protrudes. Between the sleeve-shaped portion of the first coupling part and the collar of the second coupling part 32 is an annular space in which clutch plates 33, 34 are arranged (these are most clearly in Fig. 9 represented and designated there). The clutch plates 33, 34 are alternately stacked in the manner of a multi-plate clutch, wherein the clutch plates 33 rotatably, but axially displaceably connected to the first coupling part 31 and the clutch plates 34 rotatably but axially slidably connected to the second coupling part 32 are connected. For rotationally fixed connection with the first and second coupling part 31, 32, for example, the first and second coupling parts 31, 32 axially extending webs, which engage in recesses on the peripheral edges of the clutch plates 33, 34. The education can Here, in principle analogous manner as in the detained and driven friction parts 60, 61 of the damping device 14 be.

The clutch plates 33, 34 are in this case between stop surfaces of the first and second coupling parts 31, 32, 34 axially support the respective edge-side clutch plate 33 ,.

When the first coupling part 31 is displaced relative to the second coupling part 32 such that the distance of the stop surfaces is reduced, the clutch plates 33, 34 are compressed. This mutually facing friction surfaces of the clutch plates 33, 34 pressed against each other, so that a total of a frictionally caused rotationally fixed connection between the coupling parts 31, 32 is made.

The opening and closing of the respective coupling device 30 via a respective slide control. This includes a with the retracting lever 5 during its pivoting about the pivot axis 6 moved first link member 35 and a stationary (= furniture carcase held) second link member 36. The first link member 35 here has a slide track into which the second link member 36 engages. A reverse arrangement (stationary arrangement of the slide track and arrangement of engaging in the slide track part on Einziehhebel 5) is possible. The slide control is designed in the exemplary embodiment so that a respective coupling device 30 is open both in the normal position and in the waiting position of the associated Einziehhebels 5. In an intermediate angle range of the Einziehhebels 5, the first coupling part 31 is displaced in the direction of the axis of the brake shaft 12, whereby the respective coupling device 30 is closed. In the exemplary embodiment, the clutch plates 33, 34 are compressed by an axial displacement of the Einziehhebels 5 together with the first coupling part 31 for this purpose. It could also be provided that the first coupling part 31 is rotatably connected to the Einziehhebel 5, but with respect to this axially displaceable, wherein the slide control when closing the Clutch device only the first coupling part 31, but not the Einziehhebel 5 moves axially.

When a telescoping furniture part 1 located in its fully extended position is pushed in, when it is pushed in, the driver 2 is coupled to the pull-in lever 5, wherein the pull-in lever 5 is moved starting from its standby position in the direction of its basic position. As a result, the coupling device 30 is closed and the brake shaft 12 is rotated, wherein the further displacement of the Einziehhebels 5 is attenuated in the direction of its normal position by the damping device. The pull-in spring 10 here pulls the Einziehhebel 5 in the direction of its basic position. Shortly before reaching the basic position, the coupling device 30 is opened, wherein the Einziehhebel 5 is rotated by the intake spring 10 to its normal position.

When opening one of the retractable furniture parts of the retracting lever 5 is pivoted from the driver 2 from its basic position to its waiting position, wherein the catch spring 10 is tensioned accordingly. Here, the pivoting of the Einziehhebels 5 takes place about its pivot axis 6 over that angular range over which the coupling means 30 is closed, against the braking force exerted by the damping device in this direction of rotation 11a. In this case, it is only necessary to overcome the comparatively low braking effect of the second braking device while the first, mechanically acting braking device is open. If the application of such a force but not desired, for example, between the brake shaft 12 and the shaft member 15, a freewheel be provided which is closed in the direction of rotation 11 b and opens in the direction of rotation 11a. Such freewheels are known, also in connection with dampers.

When pivoting the Einziehhebels 5 in the direction of rotation 11a, the pivoting of the Einziehhebels 5 is limited upon reaching the waiting position by a stop. For example, at the gate part 35 a corresponding Stop for the slide member 36 may be provided (not shown in the figures). In the reverse pivoting of the Einziehhebels 5 in the direction of rotation 11 b, a corresponding stop for the Einziehhebel 5 may be present, which blocks in the basic position of the Einziehhebels 5 whose further pivoting. On the other hand, the further pivoting of the Einziehhebels 5 in the direction of rotation 11 b could be limited by the limitation of the further displacement of the extendable furniture part 1 upon reaching its fully inserted position.

The shrinkage of the projection 4 of the Einziehhebels 5 in the slide track 3 of the driver 2 when closing the pull-out furniture part 1 is in Fig. 13 shown schematically. The curved extending link track 3 has an initial section 3a, at the beginning of the projection 4 moves from outside the slide track 3 in the slide track 3. Via the start section 3a, the slide track 3 guides the projection 4 in a direction 40 which encloses an angle α of less than 30 ° with the pull-out direction 7. In this case, the angle α increases continuously from the beginning of the starting section 3a, at which this angle α is preferably less than 20 °, particularly preferably less than 15 °, to the end of the starting section 3a. The end of the initial section 3 a and the beginning of a continuation section 3 b of the slide track 3 are thus where this angle α reaches the value of 30 °. By way of the continuation section 3b, this angle α continues to increase until, in any case, it is more than 45 °, in the embodiment shown between 80 ° and 90 °.

The course of the initial section 3a results in a kind of translation. It is characterized the load peak of acting on the pull-out furniture part 1 damping force, which occurs when the pull-out furniture part 1 starts at a certain speed to the Einziehhebel 5, reduced. Furthermore, the dead center of the pull-in spring 10 can thereby be overcome by a smaller force to be applied by the pull-out furniture part 1.

The slide track 3 could further have a self-healing section through which the projection 4 can enter into the continuation section 3b (in the region of its end remote from the starting section 3a) if the driver during insertion of the extendable furniture part to the Einziehebel in its basic position should start.

The coupling devices 30 could also be designed differently than in the manner of a multi-disc clutch. Thus, for example, the non-rotatably connected to the Einziehhebel 5 first coupling member 31 may have a conically extending about the axis of the brake shaft 12, away from the axis of the brake shaft 12 coupling surface. The non-rotatably connected to the brake shaft 12 second coupling member 32 may have a corresponding, conically extending around the axis of Bremswel le 12, facing the axis of the brake shaft 12 coupling surface. When the two coupling parts 31, 32 are compressed, a rotationally fixed connection between the two coupling parts 31, 32 is produced by the cooperating coupling surfaces by frictional engagement.

Also trained in other ways coupling devices could be provided. For example, the first and second coupling parts could be formed by pinions or have those which are engaged when closing the coupling device 30, directly or via at least one further arranged therebetween further pinion.

Instead of the driving link formed by the slide track 3 and the projection 4 between the driver 2 and the Einziehhebel 5 also formed in another form driving connection could be used, for example, a substantially V-shaped recess into which enters a projection. Different types of possible driving connections are known, for example, from conventional pull-out furniture parts with self-closing devices ago.

The pull-in spring 10 could also be formed in other ways than in the form of a leg spring. For example, the pull-in spring could be designed in the form of a curved leaf spring.

In a modified embodiment, it could be provided that a respective coupling device 30 remains closed even in the waiting position of the associated pull-in lever 5. It could thereby be optionally prevented that after taking off one of the extendable furniture parts 1 coupled by the device, another of these extendable furniture parts 1 is pulled out, i. a pull-out device could be provided. Here, the rotation of the brake shaft 12 could be limited by its axis by a corresponding stop, so that after the pivoting of the Einziehhebel 5 from its basic position to its waiting position further rotation of the brake shaft 12 in the direction of rotation 11 a is limited by this stop. A separate stop for each Einziehhebel 5, which limits the rotation of the respective Einziehhebels 5 in the direction of rotation 11 a, could thus be omitted. On the other hand, the further rotation of the brake shaft 12 after adjustment of the Einziehhebel 5 of its basic position in its waiting position by the further pivoting of this Einziehhebels 5 in the direction of rotation 11a limiting stop (which may be arranged, for example, the cam member 35) may be locked.

In the embodiment shown, the pivot axes 6 of the Einziehhebel 5 and the axis of the brake shaft 12 coincide. In other embodiments, it would also be possible that the pivot axes 6 and the axis of the brake shaft 12 are parallel, but spaced from each other.

1

ausziehbares Möbelteil

2

Mitnehmer

3

Kulissenbahn

3a

Anfangsabschnitt

3b

Fortsetzungsabschnitt

4

Vorsprung

5

Einziehhebel

6

Schwenkachse

7

Ausziehrichtung

8

Möbelkorpus

9

Abstützteil

10

Einzugsfeder

11 a

Drehrichtung

11 b

Drehrichtung

12

Bremswelle

13a

Lagerteil

13b

Lagerteil

14

Dämpfungseinrichtung

15

Wellenteil

16

Aufnahmeraum

17

angetriebene Reibfläche

18

festgehaltene Reibfläche

19

angetriebene Dämpferfläche

20

festgehaltene Dämpferfläche

21

Dämpfungsmedium

30

Kupplungseinrichtung

31

erstes Kupplungsteil

32

zweites Kupplungsteil

33

Kupplungslamelle

34

Kupplungslamelle

35

erstes Kulissenteil

36

zweites Kulissenteil

40

Richtung

58

festgehaltenes Dämpferteil

59

Steg

60

festgehaltenes Reibteil

61

angetriebenes Reibteil

61a

Vertiefung

62

angetriebenes Dämpferteil

63

Koppelfeder

64

Koppelteil

64a

Vertiefung

65

Steuerfläche

66

Steuerfläche

67

Haltebolzen

The axis of the first and second brake device of the damping device 14 and the axis of the brake shaft 12 coincide in the embodiment shown. In other embodiments, it would also be possible that the axis of the first and second braking device of the damping device 14 and the axis of the brake shaft 12 are parallel, but spaced from each other.

1

extendable furniture part

2

takeaway

3

link path

3a

initial section

3b

continued section

4

head Start

5

mounting tool

6

swivel axis

7

pull-out

8th

furniture body

9

supporting part

10

Pick spring

11 a

direction of rotation

11 b

direction of rotation

12

brake shaft

13a

bearing part

13b

bearing part

14

attenuator

15

shaft part

16

accommodation space

17

driven friction surface

18

held friction surface

19

driven damper surface

20

retained damper surface

21

damping medium

30

coupling device

31

first coupling part

32

second coupling part

33

clutch plate

34

clutch plate

35

first backdrop part

36

second gate part

40

direction

58

arrested damper part

59

web

60

held friction part

61

driven friction part

61a

deepening

62

driven damper part

63

coupling spring

64

coupling part

64a

deepening

65

control surface

66

control surface

67

retaining bolt

Claims (14)

Pulling device for at least two extendable furniture parts (1), which are extendable from a fully retracted position to a fully extended position in a pull-out direction (7) of a furniture body (8) and against the pull-out direction (7) in the furniture body (8) are retractable comprising for each of the pull-out furniture parts (1) a pull-out of the pull-out furniture part (1) in the pull-out direction (7) and retracting the extendable furniture part (1) against the pull-out direction (7) displaced driver (2) and for each of the extendable Furniture parts (1) one of a pull-in spring (10) acted upon Einziehhebel (5), the extracting the respective extendable furniture part (1) from the associated driver (2) between a basic position, the Einziehhebel (5) in the inserted state of the extendable furniture part ( 1) occupies, and a waiting position in which the driver (2) when pulling the pull-out furniture part (1) from Einziehh ebel (5) is decoupled, about a stationary pivot axis (6) is pivotable, characterized in that each of the Einziehhebel (5) by means of a respective coupling device (30) to a brake shaft (12) can be coupled and uncoupled from this, wherein the rotation of Brake shaft (12) is damped by a damping device (14). Pulling device according to claim 1, characterized in that the coupling of a respective Einziehhebels (5) to the brake shaft (12) and the uncoupling of a respective Einziehhebels (5) from the brake shaft (12) in each case by a slide control (35, 36) is controlled. Pulling device according to claim 1 or 2, characterized in that the Einziehhebel (5) and the brake shaft (12) are coaxial. Pulling device according to one of claims 1 to 3, characterized in that the catch springs (10) in each case on the one hand on the respective Einziehhebel (5) and on the other hand on a parallel to the brake shaft (12) extending support part (9) engage. Pulling device according to one of claims 2 to 4, characterized in that the link controls each having a respective retraction lever (5) during its pivoting about the pivot axis (6) moved along first link member (31) and a stationary second link member (32). Retractable device according to claim 4 and claim 5, characterized in that the second link parts (36) are fixed to the support part (9). Pulling device according to one of claims 1 to 6, characterized in that a respective coupling device (30) comprises at least one in the axial direction of the brake shaft (12) immovably held coupling part (32) and at least one coupling part (31), which for coupling and uncoupling of the respective Einziehhebels in the axial direction of the brake shaft (12) is displaceable. Pulling device according to one of claims 1 to 7, characterized in that the braking force of the damping device (14) on the rotational speed of the brake shaft (12) is dependent. Pulling device according to claim 8, characterized in that the damping device (14) comprises a first, mechanically acting brake device having at least one friction pair, in which for generating a braking force a driven friction surface (17) about an axis of the first brake device against a voltage applied to it fixed friction surface (18) is rotatable, and comprises a second brake device which is coupled to the first brake device, wherein the mutual Pressing of the friction surfaces (17, 18) of the friction pairing or of at least one of the friction pairings of the first brake device in response to a force exerted by the second brake device braking force, the second brake device at least one rotatable about an axis of the second brake device, driven damper surface (19) having at least one retained damper surface (20) at least one gap in which a viscous damping medium (21) is located, which upon rotation of the at least one driven damper surface (19) against the at least one retained damper surfaces (20) a braking force of second braking device causes. A retractor according to claim 9, characterized in that the axis of the first brake device about which the driven friction surface (17) of the friction pair or a respective one of the friction pairings of the first brake device is rotatable coincides with the axis of the second brake device around which the at least one driven one Damper surface (19) of the second brake device is rotatable. Pulling device according to claim 9 or 10, characterized in that at least one rotatable about the axis of the first braking device driven friction member (61) has the driven friction surface (17) or at least one of the driven friction surfaces (17) and at least one against a rotation about the axis fixed friction member (60) has the retained friction surface (18) or at least one of the retained friction surfaces (18) and at least one driven damper member (62) rotatable about the axis of the second brake assembly; the driven damper surface (19) or at least one of the driven damper surfaces (19 ) and at least one damper part (58) held against rotation about the axis comprises the retained damper surface (20) or at least one of the retained damper surfaces (20), the driven damper part (62) or one of the driven damper parts (62) Connection with the driven friction part (61) or one of driven friction members (61) or a non-rotatably connected thereto part via a coupling spring (63) is driven or the detained damper part (58) or one of the detained damper parts (58) by a connection with the detained friction member (60) or one of the detained friction parts ( 60) or a part rotatably connected thereto via a coupling spring (63) is held and that cooperating control surfaces (65, 66) in dependence on a by the braking force of the second braking device adjusting angular offset between the two by the coupling spring (63) connected parts Pressing the friction surfaces (17, 18) of the friction pair or at least one of the friction pairings set. Pulling device according to one of claims 1 to 11, characterized in that the pull-in spring (10) in the waiting position of the Einziehhebels (5), with which it cooperates, is more taut than in the basic position of the Einziehhebels (5) and in the adjustment of the Einziehhebels (5) from the basic position to the waiting position a dead center of the intake spring (10) is overcome. Pulling device according to one of claims 1 to 12, characterized in that a respective driver (2) or a respective Einziehhebel (5) has at least one slide track (3) and the other of these two parts (3, 5) at least one projection (4) has, when retracting the extendable furniture part (1) enters its associated slide track (3), said slide track (3) having an initial portion (3a), over which the projection (4) in a direction (40) is guided with the pull-out direction (7) of the pull-out furniture part (1) encloses an angle (α) of less than 45 °, and has a continuation section (3b) adjoining the initial section (3a), over which the projection (4) in one direction ( 40) is guided, which forms an angle (α) of more than 45 ° with the pull-out direction (7) of the pull-out furniture part (1). Pulling device according to claim 13, characterized in that the projection (4) is guided in a direction (40) over at least part of the initial section (3a) which adjoins the start of the starting section (3a) facing away from the continuation section (3b), with the pull-out (44) forms an angle of less than 30 °, preferably less than 20 °.

Images