EP1648265B1 - Drawer opening guide comprising an automatic retracting device with an integrated damping mechanism - Google Patents

Abstract

A drawer pull-out guide including an automatic retraction device having a pawl component with a receptacle that receives a catch on a running rail as the rails move relative to the guide rail when approaching a closed position and an entraining rocker. During a final part of retraction movement of the pawl component, the entraining rocker being coupled to and movable with the pawl component; and during an initial displacement path of the pawl component, the entraining rocker being decoupled from the pawl component and retained against longitudinal displacement in the pawl housing. A first spring biasing the pawl component into a first end position and locking the pawl component; and a second spring for biasing the entraining rocker in a direction of retraction engages on the entraining rocker.

Description

The invention relates to a provided with an automatic retractable drawer pull-out with a to be fixed to a cabinet wall of a piece of furniture guide rail and - optionally with the interposition of a middle rail - relative to the guide rail slidably mounted, to be attached to the drawer rail, wherein in one of the two arranged above the said outer rails pawl housing a displaceable between two in the drawer movement direction spaced end positions slidable by a spring arrangement in the one end position and in the other end position against retraction in the first end position lockable prestressed pawl member is provided, which provided a receptacle for one on the other rail Has driver, which moves in the relative displacement of the rails when approaching the closed position in the recording and the prestressed movable pawl member from the associated Endla unlocked, whereby this is moved under the action of the spring tension in the first end position and the associated carrier in the recording entrains the associated rail in the drawer-feed direction, wherein on or in the latch housing an attacking on the Klinenbauteil damper is provided which the retraction movement of Clutch component dampens and / or slows down. Such provided with automatic retraction drawer pull-out is eg off DE 202 18 067 U known.

With a draw-in automatic drawer guides provided which extend a drawer mounted on a cabinet body drawer during the closing movement before reaching the fully closed position by the clamping force of a preloaded spring inevitably in the drawer closed position and keep against accidental extension - for example, by the reaction of the impact shock of the drawer panel on the cabinet body or by air displacement within the cabinet body when inserting or extending adjacent drawers - have been introduced in recent years increasingly (eg DE 4 020 277 C2 ). Since modern drawer pull-outs are very smooth by the storage of rails by means of rolling elements or rollers, the bias springs used for retraction must be sized in their bias so that the associated drawers safely retracted even under heavy weight load and on the other hand less weighted drawers even with air flow in the Carcass should not be opened unintentionally. It has been found that an optimal, all requirements bill carrying interpretation of the bias of the spring is difficult. In general, therefore, the resilience of the spring is rather measured on the safe side, but this has the consequence that at least lighter drawers are accelerated on the intake path and strike the carcass, if they are not consciously slowed down by the drawer to be operated person. This bumpy slamming or snapping has been claimed by many furniture buyers, so in recent years furniture manufacturers have begun to provide additional dampers which become effective during the automatic draw-in operation between the drawers and the cabinet body, which also prevent the drawer from being subjected to relative bias dimensioned spring of the automatic retraction can be accelerated too much. In order to reduce the constructive and - due to the required additional assembly work - also manufacturing technical effort by the use of such additional damping, has already been proposed to integrate the effecting in the automatic retraction movement damper in the collection device ( DE 202 04 860.8 ). On the other hand, by using dampers, it is also necessary to further increase the spring force of the automatic retraction mechanism to ensure that the associated drawer is closed exactly. When you open the drawer, this results in the disadvantage that the spring force increases significantly by the usual longer travel, resulting in unpleasant high pull-out forces result.

The invention is based on the object to improve the automatic drawer pullers designed for drawer pull-outs with dampers so that on the one hand required for the safe closing of the drawers Spring forces can be achieved without excessively high pull-out forces arise when pulling out of the drawer.

Based on a drawer pull-out of the type mentioned above, this object is achieved in that in the pawl housing additionally provided during a final part of the retraction movement of the pawl member coupled thereto and slidable Mitnehmerwippe which decouples during the initial displacement path of the pawl member of this and is held secured against longitudinal displacement in the pawl housing, and
in that a separate spring which pretensions the driver rocker in the feed direction acts on the driver rocker. By arranging a coupled only with a part of the Auszugsweges catch member, which is associated with a separate spring, it is achieved that the pull-out force to be overcome during the first part of the extension movement is determined by the Auszugsweg both springs, but then due to the locking of Mitnehmerwippe during the second part of the extension movement and decoupling of the pawl member only the force of the first acting on the pawl member spring is overcome.

In a preferred embodiment of the invention, the movable latch member in the cross-sectionally U-shaped elongated latch housing is longitudinally displaceable and tilted in the drawer feed direction front end for locking about an axis perpendicular to the direction of displacement axis tilted, wherein the driving rocker in the between the pawl facing inner surface of the Web of the pawl housing and facing this housing interior surface of the pawl member is provided.

Thereby, the configuration can then be made so that in one of the legs of the U-section forming side walls of the pawl housing in the withdrawal direction to the Mitnehmerwippe a recess extending in the displacement direction of the pawl member recess can be provided, in which a portion of the Mitnehmerwippe in a predetermined displacement position and can be locked against further displacement, in which case from the driver rocker facing the boundary surface of the pawl member projects a driver pin to Mitnehmerwippe, which in the not pivoted into the recess of the pawl housing position of the Mitnehmerwippe engages in an associated receptacle in the driver rocker and coupled with the pawl member, however, in the pivoted-in position in the recess position of the Mitnehmerwippe comes free from the receptacle, whereby the pawl member is decoupled from the Mitnehmerwippe.

It is advisable to provide in the inner surface of the web of the pawl housing extending in the direction of displacement of the pawl member elongated recess or through hole into which a protruding from the facing flat side of the Mitnehmerwippe pin engages, in which case the elongated recess in which the pin in the pivoted position the driver rocker opposite end portion has a laterally enlarged receiving portion for the pin, in which the pin in the swung out, ie locked in the latch housing position of the Mitnehmerwippe is offset.

In order to ensure the pivoting of the driving rocker for the desired partial Auszugsweg is provided in the invention that the end faces of the receptacle are formed in the Mitnehmerwippe as obliquely to the direction of displacement of the pawl component extending inclined surfaces, that the pawl component vortretende driving pin in a displacement of Pawl component slides in the drawer pull-out direction on the associated inclined surface and pivots the driver rocker in the associated recess, but slides on a displacement of the pawl member in the drawer-feed direction when entering the receptacle on the associated inclined surface down and the Mitnehmerwippe pivots back from the recess.

Fig. 1

eine senkrechte Schnittansicht durch ein Ausführungsbeispiel einer erfindungsgemäßen Schubladen-Ausziehführung mit Einzugsautomatik;

Fig. 2

eine Seitenansicht der Einzugsautomatik der in Fig. 1 gezeigten Ausziehführung;

Fig. 3

eine Draufsicht, gesehen in Richtung des Pfeils 3 in Fig. 2;

Fig. 4

eine Schnittansicht, gesehen in Richtung der Pfeile 4-4 in Fig. 2;

Fig. 5

eine Schnittansicht, gesehen in Richtung der Pfeile 5-5 in Fig. 2;

Fig. 6

eine Ansicht des Klinkengehäuses der Einzugsautomatik der erfindungsgemäßen Ausziehführung in der der Fig. 2 entsprechenden Blickrichtung mit einem vom Klinkengehäuse abgehobenen dargestellten Lineardämpfer;

Fig. 7

eine Ansicht des Klinkengehäuses, gesehen in Richtung des Pfeils 7 in Fig. 6;

Fig. 8

eine Seitenansicht eines im Klinkengehäuse gemäß Fig. 6 und 7 längsverschieblich geführten Klinkenbauteils;

Fig. 9

eine Ansicht des Klinkenbauteils, gesehen in Richtung des Pfeils 9 in Fig. 8;

Fig. 10

eine Seitenansicht einer ebenfalls im Klinkengehäuse längsverschieblich geführten Mitnehmerwippe;

Fig. 11

eine Ansicht der Mitnehmerwippe, gesehen in Richtung des Pfeils 11 in Fig. 10;

Fig. 12a bis 12c

jeweils eine Seitenansicht, eine Draufsicht und eine Schnittansicht der in den Fig. 2 bis 5 gezeigten Einzugsautomatik ohne den Lineardämpfer in der ganz eingezogenen Stellung des Klinkenbauteils;

Fig. 13a bis 13c

der in den Fig. 12a bis 12c in der Darstellung entsprechende Ansichten der Einzugsautomatik in einer Zwischenstellung des Klinkenbauteils; in welcher die Mitnehmerwippe im Klinkengehäuse verriegelt ist;

Fig. 14a, 14b

den Fig. 12a und 12b entsprechende Ansichten der Einzugsautomatik in der ganz ausgezogenen und gegen Zurückziehen durch die auf sie einwirkende Federkraft verriegelten Stellung des Klinkenbauteils; und

Fig. 15

eine der Fig. 13 entsprechende, die Mitnehmerwippe in der im Klinkengehäuse verriegelten Stellung zeigenden Schnittansicht in vergrößertem Maßstab.

The invention is explained in more detail in the following description with reference to the drawing of an embodiment, in which:

Fig. 1

a vertical sectional view through an embodiment of a drawer pull-out according to the invention with automatic retraction;

Fig. 2

a side view of the automatic retraction of in Fig. 1 shown pull-out guide;

Fig. 3

a plan view, as seen in the direction of arrow 3 in Fig. 2 ;

Fig. 4

a sectional view, as seen in the direction of arrows 4-4 in Fig. 2 ;

Fig. 5

a sectional view, as seen in the direction of arrows 5-5 in Fig. 2 ;

Fig. 6

a view of the catch housing of the automatic retraction of the pull-out according to the invention in the Fig. 2 corresponding viewing direction with a lifted from the jack housing illustrated linear damper;

Fig. 7

a view of the pawl housing, seen in the direction of arrow 7 in Fig. 6 ;

Fig. 8

a side view of the pawl housing according to 6 and 7 longitudinally displaceably guided pawl component;

Fig. 9

a view of the latch member, as seen in the direction of arrow 9 in Fig. 8 ;

Fig. 10

a side view of a likewise longitudinally displaceable in the pawl housing guided Mitnehmerwippe;

Fig. 11

a view of the driver rocker, as seen in the direction of arrow 11 in Fig. 10 ;

Fig. 12a to 12c

each a side view, a plan view and a sectional view of the in the Fig. 2 to 5 shown automatic intake without the linear damper in the fully retracted position of the pawl member;

Fig. 13a to 13c

in the Fig. 12a to 12c in the representation corresponding views of the automatic retraction in an intermediate position of the latch member; in which the driver rocker is locked in the latch housing;

Fig. 14a, 14b

the Fig. 12a and 12b corresponding views of the automatic retraction in the fully extended and against retraction by the spring force acting on it locked position of the pawl member; and

Fig. 15

one of the Fig. 13 corresponding, the driver rocker in the locked in the latch housing position showing sectional view on an enlarged scale.

Fig. 1 shows a view at right angles to the direction of withdrawal by a pull-out guide designated in its entirety by 10, the guide rail 12 via a vertical mounting leg 14 on the - support wall of a cabinet body - not shown fastened. The rail 16 may, however, be placed in the open bottom of a - also not shown - designed as a closed metallic hollow profile side wall frame of a drawer. The pull-out guide 10 is designed in the specific case as a full extension, ie between the guide rail 12 and the running rail 16 is still a middle rail 18 is arranged, which is formed by a cross-sectionally U-shaped metal profile, of the connecting web portion at right angles folded horizontally, inside the Guide rail 12 and the running rail 16 guided legs are guided and held in the illustrated case by longitudinally displaceable in the illustrated case as rollers mounted in cages rolling elements to the associated rail. Since this is a per se known embodiment of drawer pull-out guides and the invention is not limited to the type of pull-out guides shown in the special embodiment, the pull-out guide 10 will not be described in detail below.

It is essential that is arranged in the intermediate space formed in the drawing between the guide rail 12 and the attachment to a support wall particular fixing leg 20 which is shown below in connection with the Fig. 2 to 11 will be explained in more detail. The automatic catch 20 has a cross-sectionally approximately U-shaped pawl housing 22 in which a latch member 24 is longitudinally displaceably guided over a predetermined path, in its upper, from the pawl housing 22 vortretender edge region a receptacle 26 is provided, in which the horizontal leg an attached to the running rail angled driver 28 can engage. When the guide rail 16 is displaced relative to the guide rail 12 in the withdrawal direction, the driver 28 engaging in the receptacle 26 takes the latch component 24 with it, as a result of which the latch component 26 is carried along via the latch housing provided in the latch housing.

The automatic intake 20 basically corresponds to the already mentioned, from the DE 40 20 277 C2 known automatic retraction, ie the - in the 8 and 9 separately shown - provided with the receptacle 26 flat pawl member 24 has on its opposite flat sides in each case a pair of spaced guide pins 30 which engage in provided in the facing inner sides of the pawl housing 22 elongated slot-like guides 32. The guides 32 extend over most of their longitudinal extent straight and ends only in their in the FIGS. 2 and 6 curved left arcuate end portion so that the associated guide pin 30 are guided in the displacement of the pawl member 24 to the left end position in the arcuate end portions down and then the pawl member 24 in the - in Fig. 14 pivotable recognizable - tilted end position, in which the provided on the running rail 16 driver 28 - depending on the direction of displacement of the running rail relative to the guide rail 12 - enter or exit the receptacle 26. In the tilted end position of the prestressed by an elongated coil spring 34 pawl member 24 is locked. The unlocking takes place by displacement of the running rail 16 or resting on the running rail drawer in the direction of the body interior. The provided on the rail 16 driver then exerts a force on the in Fig. 8 right boundary the receptacle 26, whereby the pawl member 24 is tilted back out of the locking position and unlocked. By the bias of the spring 34 of the pawl member is then in the in Fig. 12a and 12c recognizable right end position pulled while taking the rail 16 and resting on her drawer to the very retracted position.

The drawing-in movement is achieved by means of an elongated piston damper 38 (FIG. FIGS. 2 and 6 ) trained damper speed-dependent slowed down, whereby the drawer is guided without collision impact and correspondingly resulting shocks in the end position.

For drawers with high capacity and thus potentially high weight load, the spring 34 must engage with a correspondingly high biasing force on the latch member 24 locked. This has the consequence that when opening a drawer a correspondingly high pull-out force must be generated until the latch member 24 is locked in the latch housing 22. That the drawer has a significant pull-out resistance when pulling out, which is undesirable for reasons of comfort.

In order to significantly reduce this pull-out resistance while still ensuring the gentle and complete drawing in of a drawer mounted in a cupboard body with the pull-out guide 10 according to the invention, it is provided in the development according to the invention that the pull-in force acting on the catch member by the spring 34 is only so strongly dimensioned. the opening force to be exerted by a person opening the drawer also has a comfortable, ie not too high, size in the end area of the locking path. On the other hand, then to keep the closing force even when approaching the closed position, in which the biasing force of the spring 34 due to the largest possible displacement path, sufficiently high to close the drawer with security completely, is in accordance with the invention a parallel to the spring 34 arranged in the pawl housing 22 second spring 36 ( Fig. 3 ) provided, but the latch component side end is not directly on the pawl member 24, but on a slidable together with this pawl member in the pawl housing 22 driver rocker 40 which engages in the 10 and 11 is shown separately.

Decisive for the total force required to pull out the drawer is not re-increases to an undesirable level by the additionally engaging with the driver rocker 40 spring 36, the driving coupling of the Mitnehmerwippe 40 with the latch member 24 only over a first part of Ausziehwegs, during which the two springs 34, 36, despite their parallel connection still relatively low Build up spring forces. The entrainment rocker 40 is decoupled from the latch member 24 after a first part of the extension travel and locked in the pawl housing 22, so that then on the remaining Auszugsweg only the spring tension of the spring 34 exerts a retraction force on the pawl member 24. When closing the drawer, the automatic intake 20 thus exerts the closing force developed in the spring 34 when approaching the closed position and pulls the drawer over the driver 28 and the running rail 16 a. After a predetermined part-Einzugsweg then takes the re-entrainment of the pawl member 24 with the driver rocker 40, the latter is unlocked from the pawl housing 22. As a result, in addition to the force of the already partially relaxed spring 34, the biasing force of the additional spring 36 becomes effective and the total retraction force is increased to a degree necessary for securely closing the drawer.

The constructive solution of the driving coupling of the driving rocker 40 with the pawl member 24 only during part of the entire input or Auszugswegs is realized for the embodiment of the pull-out guide according to the invention described here, characterized in that the Mitnehmerwippe 40 between the pawl-facing inner surface of the web of the pawl housing 22 and the This facing underside of the pawl member 24 is arranged, wherein from the bottom of the pawl member 24, a driving pin 44 projects to the Mitnehmerwippe 40, which in turn below the latch member 24 in the transverse direction pivoting or tilting in the pawl housing 22 is arranged. The driving pin 44 is associated with a receptacle 46 in the driving rocker 40, in which the driving pin 44 engages during the driving coupling of the pawl member 24 and driving rocker 40.

In alignment with the driving rocker 40, a recess 48 extending in the direction of displacement of the pawl component is provided in the pawl housing 22, into which part of the driving rocker 40 can be pivoted in a predetermined displacement position and locked against further displacement. This locking position is for example in Fig. 13c and in enlarged scale - in Fig. 15 shown. In this pivoted into the recess 48 position of the driving rocker 40, the driving pin 44 can escape from the recess 46 and is then decoupled in the further tension of the pawl member 24 of the driving rocker. Due to the oblique course of the boundaries of the receptacle 46 it is achieved that the driving pin 44, when it reaches the end of the partial displacement path of the driving rocker 40, inevitably tilts it into the locking position or unlocks it again. The locking itself takes place at a stage 48 of the driving rocker 40 or by means of a of the driver rocker 40 to the bottom of the pawl housing 22 vortretenden pin 50 which engages in an extending in the bottom of the pawl housing 22 elongated recess or through hole 52, which at one end of a has laterally enlarged receiving portion 52a for the pin 50, so that the pin 50 so when tilting the driver rocker 40 in this receiving section.

In the Figures 12a to 14b three different positions of the pawl member 24 are illustrated in different views or sections. In FIGS. 12a to 12c is the position of the pawl member 24 and the catch member 40 is in locking engagement with the catch member in the fully retracted end position shown. In the Fig. 13a to 13c is shown in a corresponding representation, the position of the pawl member 24 in the displacement position in which the driver coupling of the already locked in the pawl housing 22 driver rocker 40 is released while in the Figs. 14a and 14b the outermost end position of the pawl member 24 is shown, in which the pawl member 24 is locked in its tilted end position, so that the provided on the running rail 16 driver 28 from the receptacle 26 off or can enter the receptacle 26.

Claims (5)

1. Drawer pull-out guide (10) provided with an automatic retraction device (20) and with a guide rail (12) to be fixed on a carcass wall of a piece of furniture and a running rail (16) which is movably mounted relative to the guide rail (12) and to be fixed on the drawer - optionally with a central rail (18) interposed - wherein a pawl component (24) which is movable between two end positions which are spaced from one another in the direction of movement of the drawer is provided in a pawl housing disposed on one of the two aforementioned outer rails, the pawl component being biased by a spring arrangement (spring 34) into one end position and lockable in the other end position against retraction into the first end position and having a receptacle (26) for a catch (28) which is provided on the other rail and which moves into the receptacle as the rails move relative to each other when approaching the closed position, thereby disengaging the pretensioned movable pawl component (24) from the associated end position so that the pawl component is moved under the effect of spring tension into the first end position and by way of the catch (28) held in the receptacle (26) entrains the rail associated therewith in the direction of retraction of the drawer, a damper (38) which acts on the pawl component (24) being provided on or in the pawl housing (22) to damp and/or slow down the retraction movement of the pawl component, characterised in that an entraining rocker (40) which is coupled to the pawl component (24) and is movable during a final part of the retraction movement of the pawl component is additionally provided in the pawl housing (22) and during the initial displacement path of the pawl component (24) is decoupled therefrom and is retained so that it is secured against longitudinal displacement in the pawl housing (22), and that a separate spring (36) which biases the entraining rocker (40) in the direction of retraction engages on the entraining rocker (40).
2. Drawer pull-out guide with automatic retraction device as claimed in Claim 1, characterised in that the movable pawl component (24) is longitudinally movable in the elongate pawl housing (22) of approximately U-shaped cross-section and is guided in the end which is at the front in the direction of retraction of the drawer for locking so as to be pivotable about an axis which extends at right angles to the direction of displacement, and that the entraining rocker (40) is provided in the surface of the pawl component (24) between the inner face of the web of the pawl housing (22) facing the pawl component and the surface within the housing facing it.
3. Drawer pull-out guide with automatic retraction device as claimed in Claim 2, characterised in that in one of the side walls of the pawl housing (22) forming the leg of the U-shaped cross-section in alignment with the entraining rocker (40) a recess (48) which extends in the direction of displacement of the pawl component (24) is provided in which a portion of the entraining rocker (40) can be pivoted into a predetermined displacement position and can be locked against further displacement, and that from the boundary surface of the pawl component (24) facing the entraining rocker (40) an entraining lug (44) projects towards the entraining rocker (40) and in the position of the entraining rocker (40) in which it is not pivoted into the recess (48) of the pawl housing (22) engages in an associated receptacle (46) in the entraining rocker (40) and couples the latter to the pawl component (24) in the position of the entraining rocker (40) in which it is pivoted into the recess (48) but freely comes out of the receptacle (46), as a result of which the pawl component is decoupled from the entraining rocker (40).
4. Drawer pull-out guide with automatic retraction device as claimed in Claim 3, characterised in that an elongate depression or through opening (52) extending in the direction of displacement of the pawl component (24) is provided in the inner surface of the web of the pawl housing (22) in which a lug projecting from the facing flat face of the entraining rocker (40) engages, and that in the end region opposite the lug (50) in the pivoted-out position of the entraining rocker (40) the elongate recess (52) then has a laterally enlarged receiving portion (52a) for the lug (50) into which the lug is moved in the pivoted-out position of the entraining rocker (40).
5. Drawer pull-out guide with automatic retraction device as claimed in Claim 3 or 4, characterised in that the end surfaces (46) of the receptacle in the entraining rocker (40) are constructed as oblique surfaces extending obliquely with respect to the direction of displacement of the pawl component (24) in such a way that during displacement of the pawl component (24) in the drawer pull-out direction the entraining lug (44) projecting from the pawl component (24) slides on the associated oblique surface and pivots the entraining rocker (40) out into the associated recess (48) but during displacement of the pawl component (24) in the drawer retraction direction on entering the receptacle (46) the entraining lug slides downwards on the associated oblique surface and pivots the entraining rocker (40) back out of the recess (48).

Images