EP2827741B1 - Pull-closed device for a movably mounted furniture part - Google Patents

Description

The invention relates to a closing device for a movably mounted furniture part, which in an opening direction starting from a closed position, in which a contact surface of the movable furniture part rests against a body part, can be opened in an open position and in an opening direction opposite closing direction from the open position in the closing position is closable, with a driver, which is connectable to the movable furniture part or with the body part and a Zuziehfeder acted upon by a Zuziehhebel, softer a guideway for the driver and by the driver when opening the movable furniture part between a locking position, the Zuziehhebel in the closed position of the movable furniture part occupies and in which the driver is in an on position in the guideway, and a waiting position in which the driver decouples from the Zuziehhebel to one, in the case of the connection of Mitnehme rs with the movable furniture part, relative to the body part or, in the case of the connection of the driver with the body part, against the movable furniture part stationary pivot axis is pivotable, wherein when closing the movable furniture part from an occupied by the driver in the guideway insert position a pulling force of Zuziehhebel is exercisable on the driver.

Zuziehvorrichtungen (also called self-closing or feed mechanisms) for pull-out furniture parts, such as drawers or cabinet drawer that move automatically when inserting the pull-out furniture part this over a last 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 comprises one in the pull-out direction the drawer against the force of the spring linearly displaceable carriage and tilting about a tilt axis arranged tilting part. 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 causes the pivoting of the tilting slide about an imaginary tilting axis in its tilted end position.

Today Zuziehvorrichtungen are usually equipped with insert dampers to dampen the retraction of the pull-out furniture part in the last section of the Einfahrweges. Such a damped closing 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.

From the EP 2 129 260 A1 is a damped Zuziehvorrichtung, in which a tilting slide bearing bearing unit is attached to a carcass rail of the pull-out of the pull-out furniture part and the driver is integrated in a pull-out on the pull-out furniture part pull-out.

When pivotally mounted furniture parts, such as cabinet doors, spring elements integrated in the hinges are known, which automatically swivel the pivotable furniture part over a final portion of its closing movement and thus ensure the fully closed state of the furniture part. Again, usually dampers are used to dampen the closing movement.

Formed in the form of piston-cylinder - units damper for damping the closing 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. It is known to form dampers for damping the closing of movably mounted furniture parts such that the damping force exerted by the damper essentially occurs only in the closing direction or in the closing direction is substantially greater than in the opening direction (so that the damper has a kind of "freewheel" ). 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 Kolben-Zylindereininheiten in which a between the two sides of the piston forming air pressure difference acts on an elastically deformable piston part, so that the applied friction force depends on the air pressure difference and thus on the speed of the component to be damped.

A damped closing device with a tiltable mounted on a linearly slidably mounted carriage pivotally mounted about a tilting axis goes out of the US 2011/0101839 A1 out. The carriage is acted upon by a Zuziehfeder which engages a gear segment, which meshes with a rack-like toothing of the carriage.

From the EP 1 384 420 B1 goes a kinkingly formed, about a stationary horizontal pivot axis rotatably mounted Zuziehhebel, which is acted upon by a Zuziehfeder, which is integrated into a damper forming a piston-cylinder unit. At the rear of the extendable furniture part, for example, a high-cabinet drawer, a cooperating with the closing lever driver is arranged, which has a slide track. When pulling out the pull-out furniture part of the closing lever is pivoted from the driver starting from a tumble position about the pivot axis in a waiting position in which decouples the driver from the closing lever. At the Pivoting the closing lever from the locking position to the waiting position, a dead center of the closing spring is run over, so that the closing lever is held by the closing spring in the waiting position. When inserting the pull-out furniture part moves a projection of the closing lever in the guide path of the driver, wherein the closing lever is coupled to the driver and is pivoted about the dead center of the closing spring. As a result, the closing lever pulls the pull-out furniture part in its fully retracted position. In the dead center of the Zuziehhebels, in which the closing spring is at its dead center, the closing spring is stretched the most. When you pull the pull-out furniture part exerted by the closing lever on the pull-out furniture part, acting in the closing direction closing force, starting from the closed position of the pull-out furniture part, until the closing lever reaches its dead center.

A Zuziehvorrichtung of the type mentioned is from the GB 1,117,071 out. A spring-loaded closing lever, which is mounted pivotably about a stationary relative to the furniture body axis is pivoted by a pull-out furniture part driver between a locking position, which takes the Zuziehhebel in the closed state of the extendable furniture part, and a waiting position. The spring is moved over a dead center. Again, the force to be overcome when pulling out the pull-out furniture part until reaching the dead center of the spring in comparison to the force exerted in the closed position on the pull-out furniture part closing force is relatively high.

The object of the invention is to provide a closing device of the type mentioned, in which in the closed position of the furniture part, a relatively high closing force can be exerted on the movable furniture part, with this is pressed in the closing direction against the body part, yet a relatively easy opening the movable furniture part should be possible. According to the invention, this is achieved by a closing device having the features of claim 1.

In the closing device according to the invention, the driver in its use position, from which a closing force from the closing lever on the driver is exercised when closing the movable furniture part, a distance from the pivot axis of the closing lever, at least 1.5 times, preferably at least 2 times as large as the distance that the driver has in its Zu position from the pivot axis of the closing lever.

It can thereby be effected a relatively large closing force acting in the closing direction, which is exerted on the movable furniture part, which is in the closed position, wherein the force required for pivoting the closing lever from its locking position to its waiting position, relatively low can be held.

In particular, this can be effected in the closed position of the movable furniture part sufficient contact pressure for a seal, which is arranged between the body part and the movable furniture part. As a result, a reliable seal can be achieved. For example, it may be a refrigerated cabinet or another piece of furniture that has an interior climate different from the environment, e.g. has a different temperature. The seal can be attached to the carcass part or the movable furniture part.

The pulling force exerted on the driver by the closing lever acts on the driver via a closing lever arm. The Zuziehhebelarm is preferably at least 1.5 times as large in the insert position of the driver, more preferably at least 2 times as large as in the to position of the driver. Favorably, the Zuziehhebelarm hereby continuously decreases from the use position of the driver up to the to position of the driver or continuously decreases to a present at an intermediate position of the Zuziehhebels minimum and after passing through the minimum to the minimum value by at most 30% , preferably at most 15%, again. In the latter case, the closing lever in the intermediate position in which the Minimum of the size of the Zuziehhebelarms is present, at least two thirds of its total pivot angle between the waiting position and the locking position already go through.

In order to achieve a high closing force acting in the closed position in the closing position, it is preferred that the angle between the force applied to the driver from the closing lever closing force and the closing direction in the tumbler position of the closing lever is less than 45 °, especially preferably less than 40 °.

In an advantageous embodiment of the invention, the guide track of the closing lever has a curved course, by means of which the closing force exerted on the movable furniture part can be influenced. Considering the position of the closing lever, which occupies this, when the driver is in its use position, the guide track here has a first portion which starts from the beginning of the guideway on which the driver when closing the movable furniture part in the Guideway enters, and a subsequent to the first section second section. Over the first section, the guide track extends in a direction which includes an angle greater than the angle with the closing direction of the movable furniture part, a direction pointing from the center of the driver in the insert position to the pivot axis of the closing lever , with the closing direction includes. The second section extends in a direction which encloses with the closing direction an angle which is smaller than the angle which the direction in the use position of the driver from the center of the driver to the pivot axis of the closing lever includes direction with the closing direction by this training the force exerted by the closing lever on the movable furniture part, acting in the closing direction closing force over a first phase of closing the movable furniture part by the closing lever relative to the closing force occurring in a straight course of the guide rail increases and in a second phase of the Feeding be lowered, wherein in the closed position of the movable furniture part nevertheless a high closing force can be achieved.

Advantageously, the residual stress, which has the closing force in the Zu position of the driver relative to the relaxed state of the closing spring, greater than the difference between the tension of the closing spring, which has these in the insert position of the driver, and the tension of the closing spring, which has these in the to position of the driver. In the case of the formation of the closing spring in the form of a helical spring, this is achieved in that the difference between the length of the closing spring in the to position of the driver and the length of the closing spring in its relaxed state is greater than the difference between the length of the closing spring, which this has in the use position of the driver, and the length of the closing spring, which has these in the to position of the driver. This is achieved by a sufficiently long closing spring.

Since by such a design of the closing spring of the characteristic area used is relatively flat, this also contributes to a relatively high closing force in the closed state of the movable furniture part and yet relatively easy opening of the movable furniture part is achieved.

In a preferred embodiment of the invention, the pivoting of the closing lever from the waiting position to the tumble position is damped by at least one damper, in particular a linear damper. The at least one damper is conveniently on the one hand connected to a pull rod, which is pivotally connected to the closing lever, on the other hand connected to the bearing unit. In order to achieve the most straight possible displacement of the end of the drawbar, with which the at least one damper is connected, the pull rod is advantageously guided by a curved slide track. In addition, conveniently, a linear guide for the pull rod is present, which is closer to when connected to the at least one damper end of the pull rod as the slotted guide.

In order to receive forces or force components exerted on the driver which act at right angles to the opening or closing direction, the bearing unit, on which the closing lever is pivotably mounted, preferably has a lateral guide for the driver running in the closing direction.

• Fig. 1 eine Schrägsicht eines mit erfindungsgemäßen Einziehvorrichtungen ausgestatteten Möbels, wobei der Möbelkorpus nur zum Teil dargestellt ist und die beweglichen Möbelteile in strichlierten Linien angedeutet sind;
• Fig. 2 einen vergrößerten Ausschnitt A von Fig. 1;
• Fig. 3 einen vergrößerten Ausschnitt B von Fig. 1;
• Fig. 4 eine Explosionsdarstellung der Zuziehvorrichtung;
• Fig. 5 bis 10 Ansichten der Zuziehvorrichtung (von der Mitnehmereinheit ist nur der Mitnehmer dargestellt) in verschiedenen Stellungen beim Schließen des beweglichen Möbelteils, wobei in den Fig. 7b, 7c für die Stellung gemäß Fig. 7a nur der Zuziehhebel und der Mitnehmer und in Fig. 10b für die Stellung gemäß Fig. 10a nur der Zuziehhebel und der Mitnehmer vereinfacht dargestellt sind;
• Fig. 11 ein Kraft-Weg-Diagramm;
• Fig. 12 einen Mittelschnitt durch die Zuziehvorrichtung in der Schließstellung des beweglichen Möbeiteils;
• Fig. 13 bis 17 verschiedene Stellungen beim Schließen des beweglichen Möbelteils gegen den sich bereits in seiner der Zuhaltestellung benachbarten Endstellung befindenden Zuziehhebel und beim anschließenden Öffnen des Möbelteils (von der Mitnehmereinheit sind nur der Mitnehmer und der Selbstheilzapfen dargestellt);
• Fig. 18 bis 23 Ansichten einer modifizierten Ausführungsform der Zuziehvorrichtung in verschiedenen Stellungen beim Schließen des beweglichen Möbelteils.

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 a furniture equipped with retractors according to the invention, wherein the furniture body is shown only in part and the movable furniture parts are indicated in dashed lines;
• Fig. 2 an enlarged section A of Fig. 1 ;
• Fig. 3 an enlarged section B of Fig. 1 ;
• Fig. 4 an exploded view of the closing device;
• Fig. 5 to 10 View of the closing device (of the driver unit is shown only the driver) in various positions when closing the movable furniture part, wherein in the Fig. 7b, 7c for the position according to Fig. 7a only the closing lever and the driver and in Fig. 10b for the position according to Fig. 10a only the closing lever and the driver are shown simplified;
• Fig. 11 a force-displacement diagram;
• Fig. 12 a central section through the closing device in the closed position of the movable Möbeiteils;
• FIGS. 13 to 17 different positions when closing the movable furniture part against the already in his the Zuhaltestellung adjacent end position Zuziehhebel and the subsequent opening of the furniture part (of the driver unit only the driver and the self-healing are shown);
• Fig. 18 to 23 Views of a modified embodiment of the closing device in different positions when closing the movable furniture part.

A first embodiment of the invention is in the Fig. 1 to 17 shown.

A respective closing device comprises a Zuzieeinheit 1, which is fixed to a body part 2 of the furniture, and a driver unit 3, which is fixed to the respective movable furniture part 4.

The movable furniture parts 4 are linear in the embodiment of a closed position (in which the lower in Fig. 1 shown movable furniture part 4 is located) in an opening direction 5 to an open position (in which the upper in Fig. 1 shown movable furniture part 4 is) displaceable and displaceable in the direction opposite to the opening direction closing direction 6 from the open position to the closed position. So it is about extendable and retractable furniture parts 4, which may be formed for example in the form of drawers, trays or cabinet extensions. To extend and insert the furniture parts 4 serve not shown pull-out guides.

The driver unit 3 comprises a support plate 7, which is fastened to the furniture part 4, for example by points, and a protruding from the support plate 7 driver 8. From the support plate a cloth is punched out and bent, which forms a self-healing pin 32, the function explained in more detail below becomes. The driver 8 may be formed by a rigid pin or having a roller which cooperates with the guide track 18 described below.

The closing unit 1 comprises a bearing unit 9 which is rigidly connected to the body part 2 and which is formed, for example, as shown by a bent sheet metal. The bearing unit 9 is mounted in the embodiment with the body part 2 via a on the body part 2, for example by screwing, mounted mounting rail 10. For attachment to the mounting rail 10 are fastening screws 11 which pass through slots in the mounting rail 10, and an adjusting screw 12. A head 13 of the adjusting screw 12 passes through slots in opposite side portions of the bearing unit 9 and is thereby rotatable, but axially held immovably in the storage unit 9. The shaft 14 of the adjusting screw is screwed into a thread of the mounting rail 10.

On the bearing unit 9, a Zuziehhebel 15 is pivotally mounted about a pivot axis 16, wherein the pivot axis 16 is stationary to bearing unit 9 and thus in the embodiment stationary to the body part 2. The pivot axis 16 is perpendicular to the opening and closing direction 5, 6.

The closing lever 15 is acted upon by a closing spring 17, which acts on the one hand on the bearing unit 9 and on the other hand on the closing lever 15.

When closing the movable furniture part 4, the driver 8 runs at a beginning 19 of the guideway 18 in this and moves away until reaching the closed position of the movable furniture part 4 from the beginning of the 19 Guideway 18. Over the range of movement of the movable furniture part 4 over which the driver 8 is in the guideway 18, corresponds to each position of the movable furniture part of a unique position of the driver 8 in the guideway 18 and a unique pivotal position of the closing lever 15 to the Pivot axis 16.

As soon as the driver 8 has retracted over a small path into the guide track 18 (this path corresponds to less than a fifth of the entire path between the beginning of the guide track and the to-position of the driver 8), the driver 8 advantageously has a relatively low profile Play against the guideway 18 on. This is preferably less than 25% of the diameter of the driver 8, more preferably less than 10% of the diameter of the driver. 8

In the closed position of the furniture part 4, the driver 8 is in a closed position in the guide track 18. The closing lever 15 is then in a locking position with respect to its pivoting about the pivot axis sixteenth

When opening the movable furniture part 4, starting from its closed position, the driver 8 moves in the guideway 18 in the direction of the beginning 19 of the guideway 18, wherein he pivots the closing lever 15 about the pivot axis 16. The closing spring 17 is in this case increasingly stretched until a dead center of the closing spring 17 is crossed at the end of the pivoting of the closing lever 15. The Zuziehhebel 15 is further pivoted on further opening of the furniture part 4, with the closing spring 17 again relaxed a little (preferably less than one-fifth of the preceding voltage increase), and then the driver 8 decoupled from the closing lever 15 by the am Early 19 of the guideway 18 emerges from this. The closing lever 15 is now in its waiting position, in which it is held by the closing spring 17 (being blocked against further pivoting by a corresponding stop).

When closing the movable furniture part 4 starting from an open position of the driver 8 runs to the in his waiting position located closing lever 15, wherein the driver 8 enters the guide track 18 at its beginning 19. Upon further closing of the movable furniture part 4 of the closing lever 15 is first pivoted by the driver 8 to a dead center position in which the closing spring 17 is at its dead center. As soon as the dead center is exceeded, the closing lever 15 is acted upon by the closing spring 17 in the direction of its locking position about the pivot axis 16. The closing lever 15 then exerts on the driver 8 a closing force FZ. In this case, it is assumed that the speed of closing the movable furniture part 4 approaches zero. In other words, each approached point of the closing path is approached and then the movable furniture part 4 released. The position of the driver 8 in the guideway 18, in which hereby when closing the movable furniture part 4, the closing force exerted by the closing lever 15 on the driver 8 Zuziehkraft is used, is referred to in this document as the use position of the driver 8 in the guide track 18. Apart from frictional forces lies the insert position only infinitesimal spaced from the position occupied by the driver at the dead center position of the closing lever 15 in the guide track 18.

Fig. 5 shows the state when closing the furniture part 4, before the driver 8 has started to the closing lever 15. Fig. 6 shows the state in which the driver 8 just starts to the Zuziehhebel 15 and at the beginning 19 of the guideway 18 enters into this. Fig. 7a shows the position in which the driver 8 is in its use position. The closing lever 15 is thus essentially in its dead center position. The position of in Fig. 7a invisible Zuziehfeder 17 is indicated by a dashed line.

The in Fig. 7b shown state corresponds to that of Fig. 7a , wherein only the driver 8 and the closing lever 15 are shown. The driver 8 has from the pivot axis 16 of the closing lever 15 at a distance a. In Fig. 7b Furthermore, the closing force FZ is drawn, whereby only the right direction, but not the correct amount is shown (this is really only an "infinitesimal" closing force). The closing force FZ is perpendicular to the tangent T, which is applied to the driver 8 acting on the wall of the guide track 18 at the contact point with the driver 8. The closing force FZ can be decomposed into a component acting in the closing direction 6 and into a component standing at right angles thereto. The component acting in the closing direction 6 represents the closing force FS acting on the movable furniture part 4 in the closing direction 6.

The Zuziehkraft FZ exerted by the closing lever on the driver 8 acts on the driver via a Zuziehhebelarm ZH. This is perpendicular from the pivot axis 16 on the line of action of the closing force FZ precipitated Lot.

In Fig. 7b Furthermore, the angle α is drawn, which includes the closing force FZ with the closing direction 6.

FIGS. 8 and 9 show intermediate positions during further closing of the movable furniture part 4. The closing force FZ is shown in each case (the amount is not shown in the correct size). It can be seen that the angle α between the closing force FZ and the closing direction 6 at least until in Fig. 9 shown intermediate position enlarged.

The Fig. 10a and 10b show the closed position of the movable furniture part 4, in which the closing lever 15 is in the locking position. In Fig. 10b Again, only the closing lever 15 and the driver 8 are shown, wherein the closing force FZ is again drawn (their amount is not shown in the correct size).

The driver 8 is in its on position in the guideway 18. In Fig. 10a and 10b the driver is located almost at the end of the guideway 18 of the closing lever 15. In practice, one will provide a sufficient distance from the end of the guideway 18 to accommodate assembly and component tolerances can.

In the to position of the driver 8, the distance a of the driver 8 from the pivot axis 16 is substantially smaller than in the use position of the driver 8. In the use position of the driver 8, the distance a of the driver 8 from the pivot axis sixteenth at least 1.5 times as large as in the to position of the driver, in the embodiment shown more than 3 times as large.

The Zuziehhebelarm ZH is also much smaller in the closed position of the driver 8 as in the use position of the driver 8, in the illustrated embodiment, about one-third as large. In the exemplary embodiment, the Zuziehhebelarm ZH continuously decreases from the use position of the driver 8 to the on position of the driver 8.

In Fig. 10b are further shown in the closing direction 6 and acting perpendicular thereto components of the closing force FZ. The in the closing direction acting component of the closing force FZ represents acting in the closed position of the movable furniture part 4 on the movable furniture part 4 in the closing direction 6 closing force FS. With this closing force a contact surface of the movable furniture part 4 is pressed against the body part 2. In the exemplary embodiment, the body part 2 is provided with a seal 20 to which the movable furniture part 4 is pressed. In order to produce a sufficient tightness between the movable furniture part 4 and the seal 20, a sufficiently high closing force is required. The seal 20 could also be arranged on the movable furniture part 4.

In order for the component of the closing force FZ acting in the closing direction 6 to be sufficiently large, the angle α between the closing force FZ applied to the driver 8 and the closing direction 6 is advantageously less than 45 °, preferably less than 40, in the closed position of the driver 8 °.

The closing spring 17 is formed in the embodiment in the form of a helical spring, which is loaded on train, so represents a tension spring. In Fig. 12 the closing spring 17 is shown in the locking position of the closing lever. The closing spring 17, in the locking position of the closing lever 15, has a residual tension relative to its relaxed state, ie its length l is longer than its length in the relaxed state. As a relaxed state of the closing spring 17, the state is referred to, in which no external forces acting on the closing spring 17 (internal stresses may still exist). In order to achieve the relaxed state, the closing spring 17 must thus be removed from the Zuzieheinheit. The difference between the tension which the closing spring 17 has in the dead center position of the closing lever 15 or in the insertion position of the driver 8 and in the locking position of the closing lever 15 or the closing position of the driver 8 is greater than the residual tension of the closing spring 17 In other words, the change in length of the closing spring 17 between the dead center position of the closing lever 15 and the insert position of the driver 8 and the locking position of the Zuziehebels 15 and the closed position of the Driver 8 is greater than the change in length between the locking position of the closing lever 15 and the to-position of the driver 8 and the relaxed state of the closing spring 17th

In order to favorably influence the course of the closing force FS acting on the movable furniture part 4 in the closing direction, the guide track 18 has a curved course and could therefore also be referred to as a slide track. The curved course should be defined on the basis of the position of the closing lever 15, which assumes this in the use position of the driver 8, that is essentially in the dead center position of the closing lever 15. It is on this Fig. 7c referenced, in which the closing lever 15 and the driver 8 in the position according to Fig. 7a are drawn. The guideway 18 then has at its beginning 19 a first section. The guideway extends over this first subsection in a direction RF, which encloses an angle ε with the closing direction 6. The direction RS which points from the center of the carrier 8 located in the insert position to the pivot axis 16 of the closing lever 15 includes, with the closing direction 6, an angle Φ which is smaller than the angle ε. The first subsection is followed by a second subsection. Over this, the guide track extends in a direction RF, which includes a smaller angle ε with the closing direction 6 than the angle Φ, which includes the direction RS with the closing direction 6. In Fig. 7c For example, the direction RF in which the guideway travels from its beginning 19 is drawn at the point where the driver 8 is in its deployed position and at the location of the transition between the first and second subsections (direction RF is here parallel to the direction RS). The second section may extend to the location of the guideway 18 in which the driver 8 is in its closed position. It could also connect to the second part of a third subsection, over which the angle ε is again greater than the angle Φ (the direction RF of the guide rail 18 may in this case have the other side of the closing direction 6 as in the first section).

Fig. 11 shows the force-displacement diagram when closing the movable furniture part 4. The abscissa denotes the pull-out path s, ie the distance of the movable furniture part 4 from the closed position. The ordinate designates the closing force FS acting in the closing direction 6. If the furniture part 4 is closed from its open position, it starts at the point s2 to the closing lever 15 and as a result, the force of the closing spring 17 must be overcome (this corresponds to a negative closing force FS) until at the point s1 the Dead center position of the closing lever 15 is reached (FS = 0). In a further reduction of the Ausziehweges s, the closing force FS increases and then remains largely constant for a relatively large distance to a low value FS1, in order then to increase again in the direction of the closed position. In the closed position s0 of the furniture part 4 then there is a maximum value FS2 of the closing force.

Due to the curved course of the guide track 18, the course of the closing force FS is influenced. If the guideway 18 ran rectilinearly from its beginning 19 to its end, then the rise would then be substantially flatter at s1 (so that a sufficient closing force would be reached at a greater distance from the insert position of the driver 8 to automatically move the furniture part 4) and would then increase faster over the value FS1.

From the force-displacement diagram is thus apparent that a high closing force FS2 is achieved in the closed position and this falls rapidly when opening the furniture part 4 to a much lower value FS1. When opening the furniture part 4, a relatively high closing force must therefore be overcome only at the very beginning of opening. The area under the curve for the closing force, which corresponds to the energy to be applied for opening, is relatively small. This applied energy is essential for the user's subjective impression of how "heavy" the furniture part 4 can be opened.

In order to overcompensate for the decreasing spring force of the closing spring 17 from the insert position of the driver 8 to the to position of the driver 8, several effects are exploited. In particular, as described, the Zuziehhebelarm ZH reduced. Furthermore, the lifting arm, over which the closing spring 17 acts on the closing lever 15 increases (when the closing spring 17 is in the insert position of the driver 8 substantially at its dead center, this is automatically the case). In addition, the closing spring 17 is formed as described relatively long or with the corresponding voltage differences between the use position and the closed position of the driver 8 and the relaxed state. The course of the guideway 18 is formed accordingly, with the course of the guideway 18, the force-displacement diagram can also be favorably influenced.

The pivoting of the closing lever 15 from the waiting position to the locking position is damped by the dampers 21, 22. This can be achieved on the one hand, a damping of a quick start of the driver 8 to the closing lever 15, on the other hand, a cushioned pulling the movable furniture part 4 by the closing device. It is in the exemplary embodiment to linear damper, which are formed by hydraulically or pneumatically acting piston-Zylindereininheiten. The coupling of the dampers 21, 22 to the closing lever 15 via a pull rod 23 which is pivotally connected to the closing lever 15. The dampers 21, 22 engage on the one hand on the pull rod 23, in the illustrated embodiment on their piston rods, on the other hand on the bearing unit 9, in the illustrated embodiment, on their cylinders on. For holding the cylinders of the dampers 21, 22 relative to the bearing unit 9, the cylinders of the dampers 21, 22, for example, as shown constrictions 24, in which projections of the bearing unit 9 engage. The bottoms of the cylinders of the dampers 21, 22 each have a recess 25 in which a further projection of the bearing unit 9 engages. The piston rods of the dampers 21, 22 are connected to the pull rod 23 each pivotally. The pull rod has for connection to the piston rods a T-shaped standing to a longitudinal section standing yoke.

The pull rod 23 is movably guided by a slot guide and a slide guide relative to the bearing unit 9. To the training of Slot guide engages a guide pin 26 of the pull rod 23 in a slot 27 of the bearing unit 9 a. The slot 27 has a keyhole-like extension, through which the enlarged head of the guide pin 26 can be inserted in the assembly of the Zuzieeinheit 1 in the slot 27. To form the slotted guide, the pull rod on the guide pins 28 which engage in slide tracks 29 of the bearing unit 9. In the exemplary embodiment, opposing connecting pins 28 of the pull rod 23 are provided and two arcuate slide links, between which the pull rod 23 is guided. It could also be provided only a slide pin 28 and an arcuate slide track 29.

The slot guide is closer to the end of the pull rod, which is connected to the dampers 21, 22 as the at least one slotted guide. Due to the correspondingly curved course of the slotted guide in conjunction with the rectilinear slot guide is achieved that the connected to the dampers 21, 22 end of the pull rod 23 during the pivoting of the closing lever 15 moves largely straight and without greater pivoting.

The dampers 21, 22 are designed such that they have a substantially lower or practically no damping force in the opening direction 5. Damper with such a "freewheel" are known.

Since more or less large side-forces oriented perpendicular to the closing direction 6 occur on the driver 8 during the movement through the guide track 18, it is advantageous if the driver 8 is guided by the bearing unit 9 in the closing direction 6 or opening direction 5. To form such a side guide for the driver 8, the bearing unit 9 has a running in the closing direction 6 slot 30, in which the driver 8 when closing the furniture part 4 moves. Conveniently, the driver 8 is already in this slot 30 of the bearing unit 9 when the driver 8 starts at the closing lever 15.

Normally, the closing lever 15 should be in its waiting position when the associated movable furniture part 4 is opened. However, it is conceivable that the closing lever 15 is pivoted in the open state of the furniture part 4 via its dead center. The Zuziehhebel 15 then snaps into an end position, which is at one of the waiting position opposite end of the pivoting of the closing lever 15, ie in the vicinity of the Zuhaltelstellung. To limit the pivoting of the closing lever 15 in this direction, a corresponding stop is provided. In order to put the closing device back into proper operation in such a case, the closing lever 15 has a self-healing arm 31, which protrudes from the closing lever 15, and the driver unit 3 has a self-healing pin 32.

The closing of the furniture part 4 against the located in its end position Zuziehhebel 15 is in the Fig. 13 to 15 shown. The self-healing plug 32 in this case runs against the self-healing arm 31 and is guided by an oblique surface of the self-healing arm 31 (using the material elasticities). In addition or instead, an oblique surface may be provided on the self-healing plug 32. The end of the possible closing movement of the furniture part 4 is achieved in this case when the driver 8 starts against the closing lever 15 located in its end position, cf. Fig. 15 , If the furniture part 4 is pulled out again as a result, the self-healing pin 32 pivots by its attack on the self-healing 31, the closing lever 15 in its waiting position, see. FIGS. 16 and 17 , whereupon the self-healing pin 32 decouples from the self-healing 31.

The Fig. 18 to 23 are to the Fig. 5, 6, 7a . 8, 9 and 10a analogous representations illustrating the process of closing a movable furniture part 4 for a modified embodiment of the invention. The difference with respect to the previously described embodiment is merely that the guide track 18 of the closing lever 15 is rectilinear here. The beginning and the end of the guideway 18 are in the same places as in the embodiment described above. Although the force curve is not quite as favorable as in the embodiment described above, but still a large on the closed furniture part 4 acting closing force in the closing direction 6 and the force required to open the furniture part 4 force can be kept relatively low. In the Fig. 20 and 23 is also the respective Zuziehhebelarm ZH drawn, from which it is apparent that this is in the use position of the driver 8 is substantially larger than in the closed position of the driver 8, at least 1.5 times, preferably two or more times as large ,

Various further or other modifications of a closing device according to the invention are conceivable and possible. Thus, for example, a pressure spring formed by a helical spring could also be used for the closing spring 17. If necessary, a support against lateral buckling may be provided, for example in the form of a sleeve surrounding the coil spring. Also other types of Zuziehfedern as coil springs can be used, for example, torsion springs.

In order to keep the closing lever 15 in its waiting position, the described driving over a dead center of the closing spring 17 is a particularly simple possibility. However, other types of locking of the closing lever 15 in its waiting position could also be provided. Thus, adjustable locking elements could be provided, which are actuated by the incoming driver 8. The insert position of the driver would then be located where the driver has actuated such a locking element and the closing lever 15 has been released, so that it can be pivoted by the closing spring 17.

In the Fig. 1 to 3 the assembly of the respective Zuzieheinheit 1 on the body part 2 and the respective driver unit 3 is shown on the respective movable furniture part 4 and the function of the closing device has been described below for this arrangement of the Zuzieheinheit 1 and the driver unit 3. However, a respective closing unit 1 could also be mounted on the movable furniture part 4 and the respective associated driver unit 3 on the body part 2. The function is completely analogous to such a kinematic reversal.

In the figures, the use of a closing device in connection with a rectilinear pull-out and retractable furniture part 4 is shown. A closing device according to the invention could also be provided for a pivotably mounted furniture part, for example, a door or a flap could be equipped with a closing device according to the invention. If the driver is mounted on the front side of this pivotable furniture part, so would the processes according to the Fig. 5 to 10 and 13 to 23 look completely identical (only the driver would slightly shift to the image plane). But also an attachment of the driver on a pointing in the direction of the pivot axis of the furniture part side of the furniture part would be possible. The slightly curved course of the driver would then have to be considered accordingly (the current opening direction or closing direction would be the tangent to this arcuate course). <b> legend </ b> to the reference numbers: 1 Zuzieheinheit 18 guideway 2 body part 19 Beginning 3 Driver unit 20 poetry 4 movable furniture part 21 damper 5 opening direction 22 damper 6 closing direction 23 pull bar 7 support plate 24 constriction 8th takeaway 25 deepening 9 storage unit 26 spigot 10 mounting rail 27 Long hole 11 fixing screw 28 link pin 12 adjusting screw 29 link path 13 head 30 slot 14 shaft 31 Selbstheilarm 15 Zuziehhebel 32 Self-healing pins 16 swivel axis 17 Zuziehfeder

Claims (15)

1. Closing device for a movably mounted furniture part (4) which, proceeding from a closed position in which a contact face of the movable furniture part (4) abuts against a body part (2), is openable in an opening direction (5) into an open position, and is closable in a closing direction (6), which is opposite to the opening direction (5), from the open position into the closed position, having a carrier (8) which is connectable to the movable furniture part (4) or to the body part (2) and having a closing lever (15) which is acted upon by a closing spring (17) and comprises a guide track (18) for the carrier (8) and is pivotable by the carrier (8) when the movable furniture part (4) is being opened between a hold-closed position, which the closing lever (15) assumes in the closed position of the movable furniture part (4) and in which the carrier (8) is situated in a closed position in the guide track (18), and a standby position, in which the carrier (8) uncouples from the closing lever (15), about a pivot axis (16) which is stationary in relation to the body part (2) when the carrier (8) is connected to the movable furniture part (4), or in relation to the movable furniture part (4) when the carrier (8) is connected to the body part (2), wherein upon closing the movable furniture part (4), a closing force (FZ) is exertable by the closing lever (15) on the carrier (8) from a start-of-operation position assumed by the carrier (8) in the guide track (18), characterised in that the distance (a) between the carrier (8) in its start-of operation position and the pivot axis (16) of the closing lever (15) is at least 1.5 times, preferably at least 2 times, as great as the distance (a) between the carrier (8) in its closed position and the pivot axis (16) of the closing lever (15).
2. Closing device according to claim 1, characterised in that when the closing lever (15) is pivoted from its hold-closed position into its standby position, a dead point of the closing spring (17) is overcome at a dead point position of the closing lever (15).
3. Closing device according to claim 1 or 2, characterised in that the closing force (FZ) exerted by the closing lever (15) on the carrier (8) acts on the carrier (8) via a closing lever arm (ZH), the closing lever arm (ZH) in the start-of-operation position of the carrier (8) being at least 1.5 times as great, preferably at least 2 times as great, as in the closed position of the carrier (8).
4. Closing device according to claim 3, characterised in that the closing lever arm (ZH) reduces continually from the start-of-operation position of the carrier (8) up to the closed position of the carrier (8) or reduces continually up to a minimum and after running through said minimum increases again by a maximum of 30%, preferably by a maximum of 15%, in relation to the value present at the minimum.
5. Closing device according to one of claims 1 to 4, characterised in that in the closed position of the carrier (8), the angle (α) between the closing force exerted by the closing lever (15) on the carrier (8) and the closing direction (6) is less than 45°, preferably less than 40°.
6. Closing device according to one of claims 1 to 5, characterised in that the guide track (18) of the closing lever (15) comprises a curved development, wherein with reference to the position of the closing lever (15) which the latter has in the start-of-operation position of the carrier (8), the guide track (18) extends over a first part portion, which adjoins a start (19) of the guide track (18) where the carrier (8) runs into the guide track (18) upon closing the movable furniture part (4), in a direction (RF), which, with the closing direction (6), encloses an angle (ε) which is greater than the angle (Φ) which a direction (RS), which points from the centre of the carrier (8) situated in the start-of-operation position to the pivot axis (16), encloses with the closing direction (6), and extends over a second part portion, which adjoins the first part portion, in a direction (RF) which, with the closing direction (6), encloses an angle (ε) which is smaller than the angle (Φ) which the direction (RS), which in the start-of-operation position of the carrier (8) points from the centre of the carrier (8) to the pivot axis (16), encloses with the closing direction (6).
7. Closing device according to one of claims 1 to 6, characterised in that the angle (α) which the closing force (FZ) encloses with the closing direction (6) increases at least over part of the pivoting of the closing lever (15) from the start-of-operation position of the carrier (8) up to the closed position of the carrier (8).
8. Closing device according to one of claims 1 to 7, characterised in that the tension which the closing spring (17) exhibits in the closed position of the carrier (8) compared to its non-tensioned state, is greater than the difference between the tension of the closing spring (17) which the latter exhibits in the start-of-operation position of the carrier (8), and the tension of the closing spring (17) which the latter exhibits in the closed position of the carrier (8).
9. Closing device according to one of claims 1 to 8, characterised in that the closing spring (17) is a tension spring.
10. Closing device according to one of claims 1 to 9, characterised in that the closing lever (15) is pivotably mounted on a support unit (9) which is fastenable on the body part (2) or on the movable furniture part (4).
11. Closing device according to one of claims 1 to 10, characterised in that the pivoting of the closing lever (15) from the standby position into the hold-closed position is damped by at least one damper (21, 22).
12. Closing device according to claim 11, characterised in that the damper (21, 22) or a respective one of the dampers (21, 22) is formed by a piston-cylinder unit which is connected at one end to a push rod (23) which is pivotably connected to the closing lever (15), at the other end to the support unit (9).
13. Closing device according to one of claims 1 to 12, characterised in that the closing lever (15) comprises a self-heal arm (31) which interacts with a self-heal journal (32), wherein the self-heal journal (32), in the event of the movable furniture part (4) closing against the closing lever (15), which is situated in an end position which lies at an end of the pivotability of the closing lever (15) opposite the standby position, the self-heal journal (32) is guided by an inclined face over the self-heal arm (31) and latches in behind the latter and upon the subsequent opening of the movable furniture part (4) pivots the closing lever (15) into its standby position in which the self-heal journal (32) uncouples from the self-heal arm.
14. Item of furniture having at least one movably mounted furniture part (4) which, proceeding from a closed position in which a contact face of the movable furniture part (4) abuts against a body part (2), is openable in an opening direction (5) into an open position and is closable from the open position into the closed position in a closing direction (6) which is opposite the opening direction (5), characterised in that the item of furniture, for its movable furniture part (4) or for at least one of its movable furniture parts (4), is provided with a closing device according to one of claims 1 to 13.
15. Item of furniture according to claim 14, characterised in that the movable furniture part (4) or the at least one movable furniture part (4) for which the item of furniture is provided with the closing device is sealed by a seal (20) in relation to the body part (2) in its closed position.

Images