DE202020106340U1 - Device for guiding a furniture pull-out, furniture pull-out and furniture - Google Patents

Abstract

Device (15) for guiding a furniture extension (3) relative to a body (2), the device (15) having three rails, comprising a body rail (16) which can be fastened to the body, an extension rail (16) which can be attached to the furniture extension (3) 17) and a center rail (18) acting between the cabinet rail (16) and the extension rail (17), the extension rail (17) and the center rail (18) sliding relative to one another and relative to the cabinet rail (16) in a first sliding direction and in a second sliding direction, so that the device (15) lengthens or shortens telescopically when the center rail (18) and/or the pull-out rail (17) is pushed in a sliding direction relative to the cabinet rail (16), with a control arrangement (19) for Specification of the relative movement of the rails (16-18) to each other is present, characterized in that the control arrangement (19) is formed between two adjacent rails (16-18), the Steuerano Arrangement (19) has an engagement section (20) on one rail and a coupling element (21) on the other rail in such a way that, depending on the position of the two rails relative to one another, there is a coupled state of the engagement section (20) and the coupling element (21) and a decoupled state of the engaging portion (20) and the coupling member (21) exists, in which the engaging portion (20) is completely separated from the coupling member (21), and wherein in a coupled state of the engaging portion (20) and the coupling member (21) the engaging portion (20) and an evasively mounted contact section (22, 23) of the coupling element (21) are pressed against one another, so that one rail entrains the other rail in the sliding direction during a sliding movement.

Description

State of the art

Devices such as rail guides, such as full extensions or partial extensions for moving furniture extensions such as drawers and the like on a piece of furniture are known. The rail guides are used for the linear guidance of a furniture pull-out relative to a body of the piece of furniture, the device having, for example, a plurality of slidably connected rails, comprising a body rail that can be fastened to the body, a pull-out rail that can be attached to the furniture pull-out, and a pull-out rail that acts between the carcass rail and the pull-out rail center rail. The pull-out rail and the middle rail can be moved relative to one another and relative to the cabinet rail in a first sliding direction and in a second sliding direction opposite to the first sliding direction in order to open and close the furniture pull-out.

A disadvantage of such devices without synchronization is that the sequence or sequence of the two movable rails when opening or closing is not defined. Starting with the furniture pull-out that is retracted or closed on the furniture, the pull-out rail opposite the middle rail is pulled out first or alone when opening, then the middle rail moves relative to the cabinet rail and thus the pull-out rail together with the middle rail into the maximum opening position. The other time, the middle rail is first pulled out together with the pull-out rail opposite the cabinet rail. If the middle rail is extended to the maximum relative to the cabinet rail, then only the pull-out rail and with it the furniture pull-out or the drawer moves out relative to the stationary middle rail.

The carcass rail is basically fixed or fixed in position on the carcass of the furniture.

The process or the sequence of movements of the rails has an influence on an opening profile and a closing profile of the rail guide and thus on a mechanical load on the guide, in particular due to the loading of the drawer and the guide's own weight. Depending on which process takes place, the opening and closing forces behave differently, for example, different forces are required to open and close the drawer manually.

In addition, it is possible with rail guides that, for example, if the pull-out rail alone first moves out, a distance between the center rail and the cabinet rail becomes comparatively very small and, for example, in the case of an unfavorable loading situation of the drawer, it can occur when the center rail is subsequently extended relative to the cabinet rail disadvantageously touching the center rail and the cabinet rail or the center rail brushing against the cabinet rail. This is disadvantageous due to wear and noise, for example.

Object and advantages of the invention

The object of the present invention is to minimize or avoid the disadvantages discussed above and to advantageously provide a corresponding device for guiding a furniture pull-out and a furniture pull-out and a piece of furniture.

The invention is based on a device for guiding a furniture pull-out relative to a carcass, the device having three rails, comprising a carcass rail that can be fastened to the carcass, a pull-out rail that can be attached to the furniture pull-out, and a middle rail that acts between the carcass rail and the pull-out rail, the The extension rail and the center rail can be displaced relative to one another and relative to the cabinet rail in a first sliding direction and in a second sliding direction, so that the device lengthens or shortens telescopically when the center rail and/or the extension rail is pushed in a sliding direction relative to the cabinet rail, with a Control arrangement for specifying the relative movement of the rails to each other is present. The device for guiding a furniture pull-out is also referred to below as a guiding device.

The essence of the invention lies in the fact that the control arrangement is formed between two adjacent rails, with the control arrangement having an engaging section on one rail and a coupling element on the other rail in such a way that, depending on the position of the two rails relative to one another, a coupled state of the engaging section and of the coupling element exists and a decoupled state of the engagement section and the coupling element exists, in which the engagement section is completely separated from the coupling element, and wherein in a coupled state of engagement section and coupling element the engagement section and an evasively mounted contact section of the coupling element are pressed against one another, so that a rail during a shifting movement in a shifting direction, the other rail is entrained in the shifting direction.

A sequence or control of the movement sequence of the rails can thus advantageously be influenced automatically and reproducibly. In particular, an opening profile and / or a Closing profile of the rail guide can be specified. A mechanical load on the guide, in particular due to the loading of the drawer and the dead weight of the guide, can be taken into account with the device with regard to a desired mechanically stable static and dynamic function of the rail guide. This allows the necessary opening and closing forces to be influenced, so that intuitive operation of the furniture pull-out is advantageously possible.

The invention makes it possible for the distance between the center rail and the cabinet rail to reliably remain comparatively constant when the pull-out rail is pulled out and pushed in, and elastic deformation of the rails when the loaded furniture pull-out is moved remains within a tolerable or acceptable range. This minimizes elastic deformation of the rails when they are moved. In particular, it can be avoided that, particularly in the case of an unfavorable loading situation of the drawer, there is disadvantageous contact with sections of the center rail and the carcass rail that are normally at a distance. This also prevents these sections from undesirably rubbing against one another on the center rail on the one hand and the carcass rail on the other. This advantageously excludes wear processes and unpleasant grinding noises. Accordingly, the rails move relative to one another in a controlled manner via corresponding bearing arrangements with, for example, a bearing cage and slide bearing elements accommodated thereon. The relative movement advantageously takes place only in the silent or low-noise and friction-minimised contact of the bearing elements provided for this purpose, which move in a rolling manner, on the rails and not with a rubbing contact with the other sections of the adjacent rails.

The mechanical coupling of the engagement section and the coupling element is realized, for example, by a detachable clipping, the coupling force required for this being realized with the force applied to the furniture pull-out from the outside when it is opened or closed. The engagement section is caught by the coupling element and later released again when the engagement section and the coupling element separate. This force is provided by the user in particular by pulling on the furniture pull-out or pressing in on the furniture pull-out. Conversely, the decoupling force for separating the engaging section and the coupling element is also applied from the outside by pulling or pressing.

The coupling element or the contact section preferably comprises a spring-loaded or elastically deflectable metal or plastic part. The engaging portion preferably comprises an element such as a pin or pin element which protrudes in a raised manner towards the coupling member. The shape of the abutment portion in the longitudinal direction of the device may be straight or curved. A contact section in the longitudinal direction of the device preferably has a first straight flat area oriented at an angle to the longitudinal direction of a rail and a second area which is angled thereto and is also oriented at an angle to the longitudinal direction of a rail. The two areas are preferably roof-shaped in the longitudinal direction and converge in a further, comparatively short area of the contact section, which forms a constriction between, for example, two opposing contact sections. The first region and the second region preferably differ in length, for example double, triple or quadruple. The longer area yields elastically with a lower counterforce than the shorter area, the lower one deflects with a larger counterforce. The counterforce is provided by pressing the engaging portion.

The principle of the invention applies when opening and closing the furniture pull-out. When closing, the force such as a peak force necessary to release the locked state is less than the force for establishing the locked state.

This is preferably realized by a different spatial adjustment of the respective areas of the contact sections. With the predeterminable shape or the shape adaptation of the coupling element, direction-dependent spring forces can be provided with the coupling element or with its contact sections, as far as the interaction with the engagement section is concerned. Direction-dependent refers to a direction in which the engagement section approaches the coupling member, ie dependent on a direction of movement of the pull-out rail and/or central rail in the opening direction or closing direction of the device.

Preferably, several system sections are present in interaction. The abutment portions each have an area such as a nip, wherein the engaging portion, between the abutment points of z. B. two plant sections can be clamped or held. The coupling element preferably comprises, for example, two movable abutment sections. It is also possible for the coupling element to have a movable contact section and an oppositely spaced contact section which is fixed on the coupling element. In the free space at a distance, the engaging section is then clamped in the coupled state of the engaging section and the coupling element. The engaging portion is in the coupled state with the belt Organ accordingly preferably clamped on both sides between the two or more plant sections. At least one or the z. B. two abutment sections are deflectable reciprocating, in particular resiliently reciprocating.

The movement of the pull-out and/or middle rail in the opening direction means a movement in which, in principle, a telescopic extension of the guide device takes place. The lengthening of the guiding device is, for example, in the region of doubling the minimum length of the guiding device. Conversely, a movement of the pull-out and/or middle rail in the closing direction means a movement in which, in principle, a telescopic shortening, a pushing together, of the guide device takes place.

In the case of two opposing contact sections, which are preferably present symmetrically to one another on the coupling element or the rail, each preferably has at least two differently angled or dimensioned longitudinal sections. The longitudinal sections include, on the one hand, a longitudinal section that is longer from the constriction in direction P1 and is angled more flatly, and, on the other hand, a longitudinal section that is shorter and angled more steeply from the constriction in direction P2. The two longitudinal sections are connected to one another via the constriction.

The longer longitudinal section is in the range of z. B. 30 angular degrees, based on the longitudinal axis of the rail in question, from one end of the coupling member to the constriction angled inward.

The shorter longitudinal section is in the range of z. B. 45 angular degrees, based on the longitudinal axis of the rail in question, from the other end of the coupling member to the constriction angled inwards.

The longer longitudinal section is preferably about three to four times longer than the shorter longitudinal section.

Due to the special shape of the coupling element or, for example, two contact sections of the coupling element, a z. B. requires significantly greater force to overcome the spring forces provided by the contact sections than when closing the furniture pull-out. This advantageously allows the center rail to be safely taken along by the pull-out rail when the furniture pull-out is opened. During normal operation, the furniture pull-out has a high level of dynamics of its own when it is opened, which is why the operator or user hardly notices the effect of the entrainment when opening. Since when closing the force to overcome the spring force of the contact sections is significantly smaller due to their design, this avoids closing errors, in particular that when the furniture pull-out is closed, the pull-out rail first moves relative to the extended middle rail and only then when the pull-out rail is completely is retracted relative to the center rail, the two rails, extension and center rail, retract together relative to the cabinet rail.

An asymmetrical design of the contact sections is advantageously implemented for this purpose, based on their effect in the opening and closing direction of the furniture pull-out, i.e. in particular from which side the engaging section comes into contact with the coupling element or the contact sections or moves towards them or moves away from them, resulting in coupling or decoupling. With the asymmetrical design of the contact sections, different force ratios become effective in different directions of movement of the pull-out rail or center rail, i.e. different driving forces and different forces such as release forces, which lead to the engaging section slipping through relative to the contact sections in the respective direction.

Preferably, in the case of two contact sections, an intermediate area that is laterally delimited by the two contact sections is formed, for example in the form of a channel, which represents a movement path for a relative movement between the engagement section and the coupling member. The intermediate area forms a guide for the engaging section, easily sliding past it or without lateral contact up to a point of the intermediate area, such as preferably a constriction, in which the opposing partial sections of the contact sections hold the engaging section in a resiliently clamping manner in the coupled state of the engaging section and coupling element.

The control arrangement is preferably provided between the center rail and the extension rail.

According to another advantageous embodiment of the invention, the control arrangement is preferably present between the center rail and the body rail.

When the control arrangement is provided between the center rail and the extension rail, the engaging portion is preferably provided on the extension rail and the coupling member is located on the center rail. However, the reverse arrangement is also advantageously possible, after which the intervention section are preferably present on the center rail and the coupling member on the pull-out rail.

According to a further aspect of the invention, the control arrangement is formed between the body rail and the center rail, with the control arrangement having an engagement section on one rail and a coupling element on the other rail in such a way that, depending on the position of the two rails relative to one another, a coupled state of the engagement section and the coupling element and there is a decoupled state of the engagement section and the coupling element, in which the engagement section is completely separated from the coupling element, and wherein in a coupled state of the engagement section and the coupling element, the engagement section and an evasively mounted contact section of the coupling element are pressed against one another, so that the Center rail is fixed in position relative to the cabinet rail.

It can thus be determined that, for example, starting from the collapsed state of the device, preferably starting from the completely or almost completely collapsed state of the device, when the pull-out rail is pulled out or when it is moved in the opening direction, the center rail remains unmoved on the cabinet rail coupled to it via the control arrangement and only later, when the pull-out rail is preferably completely pulled out to form the center rail, the center rail is decoupled from the body rail and moves relative to the body rail in the opening direction or further in the direction of movement previous to the pull-out rail when the device is pulled out. At the beginning of an opening movement of the furniture carcass, the center rail therefore remains retracted on the carcass rail or remains in a fixed position.

Advantageously, in the mechanically coupled state of the engagement section and the coupling element, the contact section of the coupling element is prestressed with a predetermined prestressing force in the direction of the engagement section, so that when a release force is reached, which acts from the engagement section against the prestressing force on the contact section, the contact section gives way and leads to a lifting of the Coupling state between the engaging portion and the coupling member leads, wherein the two rails are decoupled from each other relative to each other.

A sequence of the pull-out rail and the middle rail among one another and/or relative to the carcass rail when opening and closing the furniture pull-out can thus be predetermined. In particular, the process depends on the preload force. The prestressing force and the release force dependent thereon is dependent, for example, on the frictional forces acting when the rails are moved, which act between them when the rails are moved. The acting forces such as friction forces, static friction and / or sliding or rolling friction is in turn z. B. depending on factors such as loading or weight of the furniture pull-out.

A comparatively lower predetermined pretensioning force leads to a cancellation of the coupled state between the engaging section and the coupling element in the case of a lower releasing force. A canceled coupling state means e.g. B. that the two rails in question separate and move or can move relative to each other. Irrespective of this, the relative movement of two rails is limited, for example by stops provided on the rails, in the direction of movement or displacement of one rail relative to an adjacent rail of the device.

Load-transmitting bearing means for the movable bearing of the rails relative to one another are preferably provided between adjacent rails, such as, for example, roller carriages with roller bearing bodies such as roller bearing balls or roller bearing rollers accommodated thereon. The load-transmitting bearing means are used for the controlled, uniform displacement movement of the rails relative to one another.

A further advantage results when the control arrangement is formed between the center rail and the pull-out rail.

This arrangement is important when the guide device is in use on a piece of furniture for the opening movement and/or closing movement of the furniture pull-out with the guide device. The explanation below therefore assumes the use state. With the control arrangement between the center rail and the extension rail can be influenced or specified, for example, z. B. starting from the fully collapsed guide device or when the furniture is completely pushed in or closed furniture pull-out that the center rail first or initially moves relative to the cabinet rail so the center rail and the extension rail move together in the opening direction. In a first opening phase, the center rail is thus moved out or the center rail is pulled out relative to the carcass rail. The middle rail is initially or at the beginning of an opening process of the furniture pull-out carried along by the pull-out rail moved by external action via the coupled control arrangement or via the engaging section and the coupling element, which are connected in a force-transmitting manner. Accordingly, the middle rail is moved relative to the body rail. The solvent power that Engaging section acts against the biasing force on the contact section is initially not reached or exceeded, which means that the coupled state is not canceled, but is maintained. This means that the pull-out rail and middle rail move together in the first movement phase when opening the furniture pull-out from the closed state.

After reaching a maximum possible extended position of the center rail relative to the cabinet rail, which is realized, for example, by mechanical stops, the pull-out rail and center rail are decoupled. After that, in a second phase of movement when opening the furniture pull-out, only the pull-out rail z. B. to a maximum possible extension position. The middle rail then remains unmoved in the second phase of movement.

Without the control arrangement according to the invention between the middle rail and the extension rail, undefined movement states of the middle rail and extension rail can occur, in particular due to the loading condition of the furniture body and/or depending on friction effects, after which z. B. the middle rail is not predictable not moved with the pull-out rail or moved, for example, interrupted what z. B. means a sudden pulling out of the furniture drawer, which is undesirable.

A joint movement of the pull-out rail and center rail is generally desirable for mechanical reasons, particularly when the furniture pull-out begins to open on the furniture body.

The control arrangement between the middle rail and extension rail is particularly advantageous if it is desired that when the furniture extension is opened relative to the furniture body, the extension rail with the furniture extension first extends out together with the middle rail relative to the remaining part of the guide device.

According to an advantage of the invention, the control arrangement is formed between the body rail and the center rail.

This arrangement is important when the guide device is in use on a piece of furniture for the opening movement and/or closing movement of the furniture pull-out with the guide device. In the explanation below, the use state is assumed, ie when the device is mounted on the piece of furniture. With the control arrangement between the cabinet rail and the center rail can be influenced or specified, for example, z. B. starting from the completely pushed together guide device or with the furniture completely pushed in or closed furniture pull-out that the middle rail initially or initially remains stationary in a first opening phase. This represents an exceptional situation. The center rail is initially or initially not taken along by the pull-out rail, which moves alone. Rather, the middle rail remains in a fixed position on the body rail or is coupled to it via the control arrangement. Accordingly, the release force, which acts from the engagement section against the prestressing force on the contact section, is initially not reached or exceeded, which means that the coupled state between the center and body rail is not canceled but is retained.

The control arrangement can therefore advantageously be used to specify that the central rail moves relative to the body rail only after the pull-out movement of the pull-out rail has started or later, when the furniture pull-out has already been moved out a little on the furniture. The pull-out rail is then moved on together with the center rail in the opening direction or the pull-out rail is stationary relative to the center rail, which moves along with it.

Without the control arrangement according to the invention between the body rail and the middle rail, undefined movement states of the middle and extension rails can occur, in particular due to the loading condition of the furniture body and/or depending on friction effects. B. the center rail moves unpredictably or stops when the pull-out rail or furniture pull-out moves in the opening direction.

A joint movement of the pull-out rail and the center rail is in particular only possible when a previously acting coupling force for coupling the center rail and the carcass rail, which is provided with the control arrangement between the center rail and the carcass rail, is or was removed.

The control arrangement between the center rail and the cabinet rail is particularly advantageous if it is desired that when the furniture extension is opened relative to the furniture cabinet, the extension rail alone initially extends with the furniture extension relative to the remaining part of the guide device.

According to another advantage, the contact section of the coupling element is present on the coupling element in a resiliently yieldable manner. In this way, on the one hand, a force that can be predetermined in a defined manner can be achieved according to a spring force originating from the resilient contact section to be provided. The spring force provides the prestressing force of the respective contact section and acts in the direction of the engagement section. The release force therefore also depends on the resilient contact section. The resilient contact section is preferably reversibly resiliently movable to and fro due to the resilient yieldability. After the coupling state between the engaging section and the coupling element has been canceled, the reversibly movable contact section advantageously automatically returns to a waiting or initial position, due to the resilient yieldability of the contact section. The waiting or initial position of the contact section, i.e. an unloaded state or without contact with the engaging section, is left again during the next coupling process of the engaging section and coupling element, in that the engaging section pushes away the contact section or the two contact sections slightly. Then the engaging portion is held in place by the abutment portions that press or act in a clamping manner, which causes the coupling of the two rails in question. Instead of the waiting or starting position of the contact section, the contact section then assumes a clamping or coupling position. The contact sections can move out to different extents over a certain range, so that it is always ensured that the engaging section is held in a clamped manner.

If, for example, there are preferably exactly two contact sections, at least exactly one contact section can be resiliently deflected, preferably both contact sections can be resiliently deflected, preferably of the same type. There are preferably two identical contact sections which can be yielded identically and resiliently. If two contact sections are provided, which is preferred, they preferably leave a gap between them, in which the engaging section can appropriately dip or clip in with a corresponding relative position of the two rails. The plunging preferably takes place with some frictional contact between the engaging portion and the two abutment portions. In the coupled state, the engaging section is then in clamping contact between the contact sections. The abutment sections deviate somewhat resiliently when the engagement section enters, away from one another, so that the distance between the two engagement sections increases. The engaging portion is held pinched between the two engaging portions. An outer diameter of the engaging portion is advantageously slightly larger than a distance between the two contact portions in the clamping area such. B. a bottleneck of a path along which the engaging portion is movable relative to the coupling member when the two rails are moved relative to one another. The clamped state is a coupled state of the coupling element and the engaging section.

According to a further advantage, the contact section of the coupling element can be yielded resiliently in a direction transverse to a longitudinal direction of the rails. This is advantageous since the rails whose longitudinal directions coincide or are oriented in the same spatial manner move in their longitudinal direction. The engagement section thus also moves in the longitudinal direction and thus in the longitudinal direction to the other rail on which the two contact sections are present, for example. This is done by clamping and releasing the z. B. two laterally deflectable plant sections particularly advantageous.

The engaging section is advantageously held in a securely clamped manner, for example, laterally by, for example, two opposite and spaced resilient contact sections in the coupled state of the engaging section and the coupling member.

An advantageous modification of the invention is that the engaging section is associated with a separate component which is connected to a rail by a plug-in connection. This means that a pull-out, center and/or cabinet rail can be easily and optionally e.g. B. are subsequently preferably releasably connected to the engaging portion.

Advantageously, the component with the engaging section can be attached and removed manually to and from the rail.

Alternatively, the engaging section can also be designed as an expression or the like on the respective rail, for example, be present integrally thereon.

It is also advantageous if the coupling element is associated with a separate component which is connected to a rail by a plug connection. The coupling organ with the z. B. both movable plant sections can be attached to the rail, for example, detachably attached. The attachment is on a side facing a side of an adjacent rail on which the associated component with the engaging portion of the control assembly is present.

As an alternative, the coupling element can also be formed in one piece on the rail.

The engagement section and/or the coupling element, if not formed in one piece with the generally metal rail, preferably exist from a plastic material. Alternatively, a metal material or composite material is possible.

An alternative advantageous embodiment is characterized in that an evasive force acting on the contact section, which can be applied by contacting the engagement section with the contact section in order to bring the contact section from its waiting position into a clamping position, viewed side-dependent in the longitudinal direction of the device, with depending on on which side the engagement section approaches the contact section, a different amount of force or a different amount of force is required to reach the clamping position of the contact section. The coupling element is advantageously designed in such a way that a measure of the prestressing force, which acts on the engagement section when the engagement section and the coupling element are mechanically coupled, differs in relation to the displacement direction of the rails. A course of the relative rail movement during the opening process and/or during the closing process of the furniture pull-out can thus be individually adjusted.

Preferably, an evasive force acting on the contact section, which can be applied by contacting the engaging section with the contact section in order to bring the contact section from its waiting position into a clamping position, is considered side-dependent in the longitudinal direction of the device, depending on the side from which the engaging section approaches the contact section , a different amount of force or a different amount of force is necessary to reach the clamping position of the contact section. Accordingly, a contact section has two different areas with, for example, different rigidity against deflection.

From the engaging portion such. B. the pin, with contact with the contact section, the prestressing force to be overcome in order to push back the contact section in order to achieve the coupled state between the coupling element and the engaging section is greater on one side of the coupling element or of the contact section than on the other side of the coupling element or of the investment section.

An advantage resides in that the coupling member is configured such that an amount of biasing force acting on the engaging portion when the engaging portion and the coupling member are mechanically coupled is larger in a sliding direction of the rails by which the device telescopically elongates as a measure of the biasing force acting on the engaging portion when the engaging portion and the coupling member are mechanically coupled, in a direction of displacement of the rails, by which the device telescopically shortens. The sequence of the pull-out rail and the center rail, ie together or relative to one another, can thus be specified when the furniture pull-out is opened and closed when the device is in use. Thus, when the guide device is in use, it is mechanically advantageous. Undesirable pull-out situations of rails relative to each other are avoided and thus, for example, an unwanted lowering of the pull-out rail and/or middle rail in the event of a load can be avoided or minimized.

It is also advantageous if the coupling element is designed in such a way that a measure of the prestressing force that acts on the engaging section when the engaging section and the coupling element are mechanically coupled is smaller in a displacement direction of the rails, through which the device is lengthened telescopically as a measure of the biasing force acting on the engaging portion when the engaging portion and the coupling member are mechanically coupled, in a direction of displacement of the rails, by which the device telescopically shortens. The process of the pull-out rail and/or the center rail, i.e. a joint sliding movement relative to the cabinet rail, a movement relative to one another, can thus be advantageously specified when the furniture pull-out is opened and closed when the device is in use. In this case too, undesired pull-out situations of rails relative to one another can be avoided.

Advantageously, the coupling member has two separate and spaced abutment portions, both of which come into contact with the engaging portion when the engaging portion and the coupling member are mechanically coupled. The two contact sections are preferably advantageous for a defined clamping of the engagement section. The two contact sections are preferably designed identically opposite one another. The contact sections are preferably formed by arcuate arms z. B. are reversibly elastic reboundable. The arms are preferably articulated at both longitudinal ends or on both sides, preferably in each case by means of a film joint.

Furthermore, it is also advantageous that the coupling element has a passage area of the coupling element, which specifies a path section that the engagement section covers during a relative movement of the engagement section and the coupling element. The way in which the coupling and decoupling comes about and its strength, e.g. B. whose clamping force can be influenced. The coupling-in behavior and the decoupling behavior between the engaging section and the coupling element can thus also be specified.

the z. B. channel-like passage area preferably has a changing width in the longitudinal direction of the coupling element or the relevant rail, with unloaded contact sections. The passage area preferably forms a constriction between two opposing areas of the two contact sections. The coupling takes place there, with the engagement section filling or occupying the otherwise free intermediate area at the constriction.

The width relates to the sliding direction of the rails. The contact sections are preferably present on both sides of the path section over its length.

Accordingly, the coupling element preferably has a passage area of the coupling element with opposing walls, one wall comprising a contact section. Both walls preferably each form a contact section which is designed to be resilient. The engaging portion such. B. a pin is applied in the coupled state on both sides of a plant section, in particular touched clamping. This is preferably done at the bottleneck.

The invention also relates to a furniture pull-out with a device as described above. The furniture extract is z. B. a drawer on which the guide device is present on the side and / or below. Two similar devices are usually provided on a furniture pull-out.

Finally, the invention is aimed at a piece of furniture such as kitchen or living room furniture with a body and a furniture pull-out, which is designed as mentioned above with a guide device according to the invention.

character list

• 1 ein schematisiert dargestelltes Möbel in perspektivischer Ansicht schräg von oben mit einer daran verschieblich aufgenommenen Schublade in ausgefahrener Stellung,
• 2 einen perspektivischen Ausschnitt einer Führungsvorrichtung mit einer transparent dargestellten Auszugschiene, wobei eine Steueranordnung vorhanden ist,
• 3 einen vergrößerten Ausschnitt aus 2 ohne Auszugschiene,
• 4 einen weiteren perspektivischen Ausschnitt der Führungsvorrichtung ohne Auszugschiene und ohne Eingreifabschnitt der Steueranordnung und
• 5 einen perspektivischen Ausschnitt der Auszugschiene gemäß 2 mit einem Eingreifabschnitt.

Further features and advantages of the invention are explained in more detail with reference to the exemplary embodiments illustrated in the figures. In detail shows:

• 1 a piece of furniture shown schematically in a perspective view at an angle from above with a drawer that is movably accommodated in the extended position,
• 2 a perspective section of a guide device with a pull-out rail shown transparent, with a control arrangement being present,
• 3 an enlarged section 2 without pull-out rail,
• 4 a further perspective section of the guide device without a pull-out rail and without an engaging section of the control arrangement and
• 5 according to a perspective section of the pull-out rail 2 with an engaging portion.

1 shows highly schematized a piece of furniture 1 according to the invention in a used state with a hollow cuboid body or furniture body 2 of the piece of furniture and a furniture pull-out designed as a drawer 3, the drawer 3 being slidably accommodated on the furniture body 2 with two structural units of the same type or with two devices 15 according to the invention for guiding a furniture pull-out. The devices 15 are embodied here, for example, as full-extension rails 6-9. The furniture body 2 comprises two opposite vertical side walls 4 and 5, between which the drawer 3 can be moved horizontally via a guide system according to the invention with telescoping guide means or a first fully-extended rail 6 and a second fully-extended rail 7 from a position housed in the interior of the furniture body 2 Can be pulled out of the furniture body 2 according to P1 and pushed in in the opposite direction according to P2. In 1 the drawer 3 is shown in the maximum or complete state moved out of the interior of the furniture body 2 . This allows almost unhindered access to the storage volume of the drawer 3 from above.

If the drawer 3 uses a partial extension rail instead of the full extension rails 6, 7, the drawer 3 cannot be moved as far out of the interior of the furniture carcass 2 in direction P1 when it has been moved as far as possible, as is the case with the full extension rails 6, 7 as shown in 1 is possible.

The full extension rail 6 screwed to the inside of the side wall 4 is located opposite at the same vertical height as the one screwed to the side wall 5 1 concealed rail full extension 7, which is indicated by dashed lines.

In the furniture body 2, above the drawer 3, another drawer can be accommodated, which is guided accordingly via full extension rails 8 and 9, which in 1 is not shown.

The drawer 3 has drawer side walls 10, 11 lying opposite one another. In addition, the drawer 3 comprises a front element 12, a rear wall 13 lying opposite in the horizontal direction and a horizontally extending drawer bottom 14, which is attached to the drawer side walls 10, 11, the front element 12 and the rear wall 13 reaches or is connected to it.

2 shows schematically a front section of a possible or preferred embodiment of a device 15 according to the invention.

The device 15 is used to guide the furniture extract such. B. the drawer 3 relative to a body 2, the device 15 having three rails, comprising a body rail 16 that can be fastened to the body 2, a pull-out rail 17 that can be attached to the furniture pull-out, and a center rail 18 that acts between the carcass rail 16 and the pull-out rail 17, the pull-out rail 17 and the center rail 18 being displaceable relative to one another and relative to the carcass rail 16 in the first sliding direction P1 and in the second sliding direction P2, so that the device 15 lengthens or shortens telescopically when the center rail 18 and/or the pull-out rail is pushed 17 in a sliding direction P1, P2 relative to the cabinet rail 16.

A control arrangement 19 is provided for specifying the relative movement of the rails 16-18 to one another. The device 15 for guiding the furniture pull-out is also referred to below as the guiding device 15 .

The control arrangement 19 is formed between the two adjacent rails 17 and 18 . The control arrangement 19 has an engaging section 20 on the pull-out rail 17 and a coupling element 21 on the center rail 18 .

The control arrangement 19 ensures that, depending on the position of the two rails 17 and 18 relative to one another, there is a coupled state of the engaging section 20 and the coupling element 21 . In addition, there is a decoupled state of the engaging portion 20 and the coupling member 21 in which the engaging portion 20 is completely separated from the coupling member 21 . In the coupled state of engagement section 20 and coupling element 21, the engagement section 20 and evasively mounted contact sections 22, 23 of the coupling element 21 are pressed against one another, so that one of the rails 17, 18 takes the other rail with it in a sliding direction during a sliding movement. The abutment sections 22, 23 are opposed and leave a channel-shaped area 24 as a space between them. Thus, the engaging portion 20, which is configured here as a peg, for example with a cylindrical outer shape, is held clamped by the two contact portions 22, 23 in the coupled state of the engaging portion 20 and the coupling member 21. The 2 and 3 do not show a coupled state of engagement section 20 and coupling element 21, but rather a decoupled state of engagement section 20 and coupling element 21, the engagement section 20 being slightly removed from the clamped or coupled state. The contact sections 22, 23 are in a waiting position that is not acted upon by the engagement section 20. The distance between the avoidable contact sections 22, 23 at a constriction 28 of the area 24, i.e. between a part of the contact sections 22, 23 that protrudes towards the other contact section, is somewhat smaller than an external dimension or an external diameter of the here exemplary cylindrical engagement section 20.

The two contact sections 22, 23 are here preferably designed to be resiliently deflectable in the same way, preferably both resiliently deflectable in a direction P3, P4 transverse to the direction P1 (see Fig. 3 ).

The coupling member 21 can alternatively also z. B. have exactly one fixed contact section and only exactly one opposite resilient deflectable contact section.

Accordingly, in the coupled state of engagement section 20 and coupling element 21, when the extension rail 17 is moved out of the collapsed state of the rails 16-18 in direction P1, i.e. if the furniture extension has previously been retracted on the furniture body 2 or completely accommodated inside the furniture body 2, the Middle rail 18 entrained by the extension rail 17. The center rail 18 detaches from the body rail 16 or moves relative to the body rail 16, with the guide device 15 lengthening telescopically. At the end of the pull-out movement of the furniture drawer 3, if its fully open state according to the furniture body 2 1 is achieved, an open-topped storage volume of the furniture pull-out 3 is accessible to the user.

In the mechanically coupled state of the engagement section 20 and the coupling element 21, the contact sections 22, 23 of the coupling element 21 are prestressed with a predetermined prestressing force in the direction of the engagement section 20. The prestressing force acts against the direction P3 through the contact section 22 and against the direction P4 through the contact section 23 (p. 3 ). The engaging portion 20 is held clamped at the constriction 28 between the abutment portions 22, 23 according to the coupled state.

When the middle rail 18, which is carried along by the extension rail 17 in the direction P1, is completely extended relative to the body rail 16, for example when it is up against a stop on the cor push rail 16, the gripping section 20 is moved in the direction of P1 relative to the coupling element 21 on the upright center rail 18 by further pulling on the furniture carcass 3 in direction P1, possibly supported by the inherent dynamics of the furniture pull-out 3, so that the gripping section 20 releases the clamping areas of the contact sections 22, 23 at the constriction 28 outwards and a release force is thus provided, which acts from the engagement section 20 against the prestressing force on the contact sections 22, 23 in the constriction, the contact sections 22, 23 yield transversely to the direction P1 in the direction P3 and P4 , resulting in a cancellation of the coupling state between the engaging portion 20 and the coupling member 21. The two rails 17 and 18 are decoupled from one another and the pull-out rail 17 together with the furniture pull-out 3 can be pulled out further in direction P1 relative to the center rail 18 up to the maximum extended position according to FIG 1 .

Depending on the design of the contact sections 22, 23, the prestressing force with which the two contact sections 22, 23 are prestressed in the direction of the engagement section 20 can be predetermined.

Preferably, the engaging portion 20 is a separate component 25 associated with a plug 26 on which the engaging portion 20 is designed protruding. The plug 26 and a recess 27, which is present on the extension rail 17 in a preferably front upper rail section in the longitudinal direction of the extension rail 17, are designed to match one another so that the component 25 on the extension rail 17 can preferably be detachably attached or z. B. can be attached later.

The contact sections 22, 23 of the coupling element 21 are resiliently yieldable on the coupling element 21. Both contact sections 22, 23 are each preferably designed as a narrow, elongated material area such as a spring arm. Each material region is connected at both ends to a base body 21a of the coupling element 21 and in between is free from the base body 21a, preferably free or separate from the base body 21a or the rest of the coupling element 21 on the underside rebounding in the direction of P3 or P4 and back again. The coupling member 21 is preferably also designed as a separate component for detachable attachment to the relevant rail or a matching recess in an upper side of the center rail 18 .

In direction P1, when the engagement section 20 approaches or moves into the area 24 or the constriction 28 in the longitudinal direction of the device 15 or the center rail 18, other spring forces from the contact sections 22, 23 act on the engagement section 20 and thus also other clamping forces and thus also release forces for releasing the clamped engagement section 20 on the contact sections 22, 23 than when retracting the engagement section 20 in direction P2 towards the constriction 28.

A direction-dependent evasion and force behavior of the contact sections 22 and 23 is thus provided. The different behavior of the control arrangement 19 when closing the furniture pull-out to reach the force peak and thus to release the coupled state means that less force is required in one direction than in the other direction to overcome the coupled state. For this purpose, the contact sections 22, 23 each have two differently angled or dimensioned longitudinal sections. The longitudinal sections include, on the one hand, a longitudinal section 29 that is longer from the constriction 28 in the direction P1 and is angled at a flatter angle, and a longitudinal section 30 that is shorter and angled more steeply from the constriction 28 in the direction P2.

If, based on the telescopically collapsed device 15, the e.g 3 When the pull-out rail 17 (not shown) is pulled out in the opening direction P1, the gripping section 20 on the pull-out rail 17 comes into contact with opposite areas 22a and 23a of the contact sections 22 and 23, with these springing outwards only far enough for the gripping section 20 to reach the constriction 28 is held clamped between the contact sections 22 and 23, with the pull-out rail 18 taking the middle rail 18 with it in the direction P1 via the control arrangement 19, ie by means of the engaging section 20 held clamped. If the center rail 18 is completely or maximally shifted to the body rail 16, by z. B. a bumping against a stop on the cabinet rail 16, the middle rail 18 is fixed in position relative to the cabinet rail 16. If the pull-out rail 17 is pulled out further, due to the external force of a user by further pulling on the furniture pull-out in direction P1, the force increases, which act from the engagement section 20 against the spring forces of the two contact sections 22, 23 at the constriction 28 in a clamping manner on the outside on opposite sides of the engagement section 20. When the force from the engaging portion 20 increases further and reaches a level corresponding to a releasing force, the two abutting portions 22 and 23 deviate together or simultaneously outwards in the direction P3 and P4 (see Fig. 3 ).

The engaging section 20 slips past the constriction 28 in the area 24 in the direction of P1, so that the pull-out rail is fully extended in the direction of P1. The furniture pull-out is completely dig open or extended on the body until z. B. what 1 shows the furniture pull-out or the drawer 3 has reached its fully open end position on the piece of furniture 1. The pull-out rail 17 rests against a stop on the middle rail 18, for example.

When the furniture pull-out is closed in direction P2, the engaging portion 20 reaches opposite areas 22b and 23b of the abutment portions 22 and 23 and comes into contact with them. In comparison to the areas 22a and 23a, other spring forces, for example lower, act on the engaging section 20 due to the angularity or length of the areas 22b and 23b, so that the engaging section 20 can, for example, contact the two contact sections 22 and 23 more easily or with less force pushes away outwards in the direction of P3, P4 and passes through the constriction 28, ie is not held clamped there, or only for a short time. The extension rail 17 therefore moves past the extended stationary middle rail 18 during retraction and only after reaching a retraction stop for the extension rail 17 that is present or effective on the middle rail 18 is the middle rail 18 taken along by the extension rail 17 until both rails 17 and 18 together to the Move the cabinet rail 16 and reach the completely retracted position on the piece of furniture 1.

Reference List

1

Furniture

2

furniture body

3

drawer

4

Side wall

4a

inside

5

Side wall

6

Full extension slide

7

Full extension slide

8th

Full extension slide

9

Full extension slide

10

drawer side panel

11

drawer side panel

12

front element

13

back panel

14

drawer bottom

15

contraption

16

cabinet rail

17

pull-out rail

18

center rail

19

control arrangement

20

engagement section

21

coupling organ

21a

body

22

investment section

22a, 22b

Area

23

investment section

23a, 23b

Area

24

Area

25

component

26

plug

27

recess

28

bottleneck

29

longitudinal section

30

longitudinal section

Claims (16)

Device (15) for guiding a furniture extension (3) relative to a body (2), the device (15) having three rails, comprising a body rail (16) which can be fastened to the body, an extension rail (16) which can be attached to the furniture extension (3) 17) and a center rail (18) acting between the cabinet rail (16) and the extension rail (17), the extension rail (17) and the center rail (18) sliding relative to one another and relative to the cabinet rail (16) in a first sliding direction and in a second sliding direction, so that the device (15) lengthens or shortens telescopically when the center rail (18) and/or the pull-out rail (17) is pushed in a sliding direction relative to the cabinet rail (16), with a control arrangement (19) for Specification of the relative movement of the rails (16-18) to each other is present, characterized in that the control arrangement (19) is formed between two adjacent rails (16-18), the control an arrangement (19) has an engagement section (20) on one rail and a coupling element (21) on the other rail in such a way that the engagement section (20) and the coupling element (21) are in a coupled state depending on the position of the two rails relative to one another and a decoupled state of the engaging portion (20) and the coupling member (21) exists, in which the engaging portion (20) is completely separated from the coupling member (21), and wherein in a coupled state of the engaging portion (20) and the coupling member (21) the engaging portion (20) and an evasively mounted contact section (22, 23) of the coupling member (21) are pressed together, so that a rail at a Sliding movement in a sliding direction takes the other rail in the sliding direction. Device according to the preamble of claim 1 , characterized in that the control arrangement (19) is formed between the body rail (16) and the middle rail (18), the control arrangement (19) having an engaging section (20) on one rail and a coupling element (21) on the other rail such has that, depending on the position of the two rails relative to one another, there is a coupled state of the engagement section (20) and the coupling element (21) and a decoupled state of the engagement section (20) and the coupling element (21) exists, in which the engagement section (20) is completely separated from the coupling element (21), and wherein in a coupled state of the engagement section (20) and the coupling element (21), the engagement section (20) and a resiliently mounted contact section (22, 23) of the coupling element (21) are pressed against one another, so that the center rail (18) is fixed in position relative to the body rail (16). device after claim 1 or after claim 2 , characterized in that in the mechanically coupled state of the engagement section (20) and the coupling element (21), the contact section (22, 23) of the coupling element (21) is prestressed with a predetermined prestressing force in the direction of the engagement section (20), so that when it is reached a releasing force which acts from the engagement section (20) against the prestressing force on the contact section (22, 23), the contact section (22, 23) gives way and leads to the coupling state between the engagement section (20) and the coupling element (21) being canceled, wherein the two rails are decoupled from one another and can be displaced relative to one another. Device according to one of the preceding claims, characterized in that the control arrangement (19) is formed between the center rail (18) and the pull-out rail (17). Device according to one of the preceding claims, characterized in that the control arrangement (19) is formed between the body rail (16) and the center rail (18). Device according to one of the preceding claims, characterized in that the contact section (22, 23) of the coupling element (21) is present on the coupling element (21) in a resiliently deflectable manner. Device according to one of the preceding claims, characterized in that the contact section (22, 23) of the coupling element (21) can be yielded resiliently in a direction transverse to a longitudinal direction of the rails (16-18). Device according to one of the preceding claims, characterized in that the engaging portion (20) is associated with a separate component (25) which is connected to a rail (16-18) by a plug connection. Device according to one of the preceding claims, characterized in that the coupling element (21) belongs to a separate component which is connected to a rail (16-18) by a plug connection. Device according to one of the preceding claims, characterized in that an evasive force acting on the contact section (22, 23), which can be applied by contact of the engaging section (20) with the contact section (22, 23), to force the contact section (22, 23) out of its To bring the waiting position into a clamping position depends on the side, viewed in the longitudinal direction of the device (15), with a different amount of force to reach the clamping position of the contact section depending on which side the engaging section (20) approaches the contact section (22, 23). (22, 23) is necessary. Device according to one of the preceding claims, characterized in that the coupling element (21) is designed in such a way that a measure of the prestressing force which acts on the engagement section (20) when the engagement section (20) and the coupling element (21) are mechanically coupled , in a direction of displacement of the rails (16-18) through which the device (15) is extended telescopically, is greater than a measure of the biasing force acting on the engaging portion (20) when the engaging portion (20) and the coupling member ( 21) are coupled in a direction of displacement of the rails (16-18), through which the device (15) is shortened telescopically. Device according to one of the preceding claims, characterized in that the coupling element (21) is designed in such a way that a measure of the prestressing force which acts on the engagement section (20) when the engagement section (20) and the coupling element (21) are mechanically coupled , in a direction of displacement of the rails (16-18) through which the device (15) extends telescopically, is smaller than a measure of the prestressing force acting on the engaging portion (20) when the engaging portion (20) and the coupling member ( 21) are mechanically coupled in a direction of displacement of the rails (16-18), through which the device (15) is shortened telescopically. Device according to one of the preceding claims, characterized in that the coupling element (21) has two separate and spaced abutment sections (22, 23), which both come into contact with the engaging section (20) when the engaging section (20) and the coupling element ( 21) are mechanically coupled. Device according to one of the preceding claims, characterized in that the coupling element (21) has a passage region (24) of the coupling element (21) which specifies a path section which the engagement section (20) travels during a relative movement of the engagement section (20) and the coupling element (21) returns. Pull-out furniture (3) with a device (15) according to one of the preceding claims. Furniture (1) with a body (2) and a furniture extension (3). claim 15 .

Images