EP2526825A1 - Retraction device - Google Patents

Abstract

The device (10) has a coupling element (20), and a fluid-damper comprising a damping cylinder and a piston rod (32). A tension spring designed as a helical spring is attached to the coupling element, and an elastic element designed as a vibration damper works on the tension spring. The tension spring is arranged in a spring retainer of a housing (12). The elastic element applies transverse force on a part of spring windings and arranged in an area surrounded by the tension spring. The elastic element is made from felt material or water-repelling fibers.

Description

The invention relates to a feeder device for moving sliding parts, such as drawers, sliding doors or the like.

Such a feeder is from the DE 10 2009 020 994 A1 known. In this case, a fluid damper and a tension spring are housed in a housing of the retraction device. Both the fluid damper and the tension spring act on a coupling element. This can be pivoted between a tilted freewheeling position and a pivoted-locking position. In addition, the coupling element can also be adjusted in a sliding guide between a retraction position and the tilted freewheeling position.

The operation of the feeder is as follows. Starting from the pivoted-locking position, a driver of the sliding part (for example, a drawer) pulls the coupling element, wherein the coupled piston rod the fluid damper is pulled out of the damping cylinder. At the same time, the tension spring is tensioned. The driver pulls the sliding part until the coupling element is adjusted in its tilted freewheeling position. Then the drawer can be pulled out freely.

When the drawer is closed again, it hits the driver and lifts him out of his freewheel position. Then the tensioned tension spring is unloaded and pulled the drawer or the like sliding element automatically in its closed position. This movement is additionally damped with the damping cylinder.

Other working on this principle feeders are from the DE 10 2007 008 688 A1 and DE 201 21 255 U1 known.

It is an object of the invention to provide a retraction device of the type mentioned above, which is characterized by a quiet operation.

This invention is achieved in that acts on the tension spring an elastic element as a vibration damper.

With this simple measure, on the one hand a quiet operation is possible. On the other hand, the operational safety is increased.

Especially when the drawer or the like sliding element is moved abruptly in the direction of the closed position, the coupling element releases the tension spring abruptly. This creates vibrations in the tension spring, which are damped with the elastic element. Furthermore, the elastic element prevents inadvertent release of the coupling element when the furniture in question is placed in an environment in which oscillations prevail. These vibrations are damped by the elastic element and thus not forwarded into the tension spring. This prevents that a vibration of the tension spring would release the coupling element.

According to a preferred embodiment of the invention, it is provided that the elastic element applies a transverse force acting transversely to the longitudinal spring extension on at least a part of the spring coils. As a result, an easy to design and effective design is achieved.

The elastic element of the tension spring can be assigned in a particularly simple manner by acting on the outer contour of the tension spring.

Alternatively, it can also be provided that the elastic element is arranged in the space surrounded by the tension spring.

Preferably, the elastic element of a strip-shaped blank is formed so that it can cover a plurality of turns of the tension spring, wherein at uniform thickness of the strip-shaped blank, a substantially constant lateral force can be generated on the tension spring. In addition, the strip-shaped blank can also be made cheap.

A particularly preferred collection device is characterized in that the elastic element consists of a knitted or a felt material. These materials are available inexpensively as a mass-produced and it has been found that they do not introduce excessive friction forces in the tension spring when relaxing the spring, which would adversely affect the functionality of the tension spring. It should be provided in particular that the elastic element consists of water-repellent fibers. The elastic element does not absorb water, which would affect its function.

Particularly preferably, the tension spring is arranged at least partially in a spring receptacle of a housing, wherein the spring receptacle is bounded by a wall element. In this case, the elastic element between the wall element and the tension spring is arranged. About the wall element can be a defined To achieve assignment of the elastic element to the tension spring. In addition, a simple installation is possible here.

The elastic element can also be materially connected to the wall element, for example, be glued, or loosely held clamped to this.

Figur 1

eine Einzugvorrichtung in Seitenansicht mit einem Koppelelement in Auszugposition;

Figur 2

die Darstellung gemäß Figur 1 jedoch mit dem Koppelelement in Einzugposition;

Figur 3

die Einzugvorrichtung gemäß Figur 2 in einer perspektivischen Teildarstellung;

Figur 4

in perspektivischer Ansicht das Koppelelement mit einem angeschlossenen Dämpferelement und einer Spannfeder;

Figur 5

die Darstellung gemäß Figur 4 in einer veränderten Funktionsstellung;

Figur 6

einen Vertikalschnitt durch die Einzugvorrichtung gemäß Figur 1; und

Figur 7

die Darstellung gemäß Figur 6 in einer geänderten Funktionsstellung.

The invention will be explained in more detail below with reference to an embodiment shown in the drawings. Show it:

FIG. 1

a feeder in side view with a coupling element in the extended position;

FIG. 2

the representation according to FIG. 1 however, with the coupling element in the retracted position;

FIG. 3

the intake device according to FIG. 2 in a perspective partial view;

FIG. 4

in perspective view the coupling element with a connected damper element and a tension spring;

FIG. 5

the representation according to FIG. 4 in an altered functional position;

FIG. 6

a vertical section through the intake device according to FIG. 1 ; and

FIG. 7

the representation according to FIG. 6 in a changed functional position.

The FIGS. 1 and 2 show a feeder 10 with a housing 12 which is provided at its longitudinal ends with fastening lugs 11. The fastening approaches 11 have screw receptacles. As the FIG. 3 can be seen more clearly, the housing 12 has two mutually parallel housing walls 12.3, each extending between the attachment lugs 11. From the housing walls 12.3 guide slots 12.2 are excluded in the form of slot guides. The two guide slots 12.2 are congruent. They have a linear guide section, which merges into a widened receptacle 12.3. In the housing 12, a coupling element 20 is adjustably housed. The design of the executed as an injection molded coupling element 20 is closer from the FIGS. 4 and 5 out. As these drawings show, the coupling element 20 has a base part 21.1, to which a holder 21 is formed in the form of a cantilever. The holder 21 carries a leaf spring-like spring element 23. The spring element 23 has at its free end a second stop 24 with a stop surface 24.1. The second stop 24 terminates with a locking projection 24.2 issued in the direction of the holder 21. The second stop 24 abuts a recessed guide surface 26 of the holder 21, as the FIG. 6 more clearly shows. At the same time undercut surfaces are provided on the second paragraph 24 and the holder 21, which lie adjacent to each other form a guide 24.3. This guide 24.3 prevents deflection of the second stop 24 perpendicular to the guide surface. The FIG. 4 shows the spring element 23 in the deflected, the FIG. 5 in the deflected position.

In the deflected position of the Speranzatz 24.2 limits the full springing. When the locking catch 24.2 is brought out of engagement with the holder 21, the spring element 23 fully springs, so that the locking catch 24.2 is freely above the holder 21 in an extended position. This is the starting position in which the coupling element 20 is removed from the injection mold and thus can be produced without undercut.

The base part 21.1 also carries a first stop 25, which projects in the same direction as the second stop 24. As the FIG. 5 shows, the two stops 24, 25 to each other at a distance, so that they define a receiving space between them.

To the coupling element 20, a damping element can be coupled directly pivotally. The damping element has a damping cylinder 30, in which a piston can be displaced against the pressure of a damping fluid (for example, gaseous or liquid). The piston carries a piston rod 32, which is led out of the damping cylinder. The piston rod 32 has a bearing lug 33 at its free end. This is pivotally held on a bearing receptacle 28 of the coupling element 20. The FIG. 6 shows by way of example the connection between the piston rod 32 and coupling element 20. Accordingly, the bearing lug 33 and the bearing receptacle 28 mutually aligned holes through which a designed as a separate component bearing pin 29 is guided in the form of a cylindrical pin. The bearing pin 29 is held frictionally either in the bearing receptacle 28. The result is the pivot bearing whose pivot axis extends through the central longitudinal axis of the bearing pin 29. A further variant, not shown in the drawings, may be such that the piston rod 32 and / or the coupling element 20 have molded-on components which engage in one another to form the pivot bearing.

For example, a bearing pin 29 may be formed on the coupling element 20 (or the piston rod 32) and the piston rod 32 (or the coupling element 20) may be pushed onto this bearing journal 29 with a bore. Then can be dispensed with the bearing pin 29 as a separate component.

In the present embodiment, the bearing pin 29 protrudes on both sides via the coupling element 20, wherein the projecting portions engage in the guide slots 12.2. Thus, the coupling element 20 is guided stably between the two housing walls 12.4 and in the guide slots 12.2.

As the FIGS. 6 and 7 Further illustrate, between the piston rod 32 and the coupling element 20, a releasable connection is effective. For this purpose, the coupling element 20 on its base part 21.1 in the direction of movement of the piston rod 32 laterally open bearing receptacle 28. Here is this bearing 28 designed in the form of a slotted hollow cylinder, wherein the inner wall forms a sliding surface 28.4. The slotted side forms an insertion opening 28.1 with in the direction of movement of the piston rod 32 inclined insertion bevels 28.3. These open into a locking receptacle 28.2 enclosed by the bearing receptacle 28.2.

The bearing shoulder 33 has two mutually spaced locking elements 33.1, which are resiliently integrally formed on the piston rod 32 in one piece. The locking elements 33.1 surround a recess 33.2, which has a hollow cylindrical geometry, wherein the inner diameter of this hollow cylinder is greater than the outer diameter of the bearing journal 29. The locking elements 33.1 are provided on its outer circumference with bearing surfaces 33.3, corresponding to the inner diameter of the locking receptacle 28.2 of the coupling element 20 are convex. Thus, the bearing surfaces 33.3 and the sliding surface 28.4 in the assembled state form a pivot bearing about the central longitudinal axis defined by the bearing pin 29. As the FIGS. 6 and 7 illustrate, the connection between the coupling element 20 and the piston rod 32 can be solved, as will be explained below. When the coupling element 20, starting from the in FIG. 6 shown position in which the detachable connection is separated, moves in the direction of the bearing lug 33, so meet the locking elements 33.1 with their bearing surfaces 33.4 on the insertion bevels 28.3. There they are deflected into the space 33.4 formed between the ends of the locking elements 33.1. According to a variant embodiment, this clearance 33.4 can be dimensioned such that the bearing journal 29 can move into the recess 33.2, defying the deflection of the latching elements 33.1. In a continuation of the insertion movement snap the locking elements 331. radially, so that the pivot bearing accordingly FIG. 7 is made. The connection can, for example, when the piston rod 32 stops unintentionally, also be solved. This is possible due to the convex geometry of the bearing surfaces 33.4. These are deflected radially inward at the insertion opening 28.1.

As the FIG. 6 illustrated further, a spring holder 27 is disposed below the pivot bearing. This fixes the end of a tension spring 35, at the other End is attached to the housing 12. With the spaced arrangement of the connection point of the tension spring 35 can be a clockwise (in accordance with FIG. 5 ) are applied to the pivot axis of the pivot bearing torque acting.

According to FIGS. 6 and 7 are on the housing 12 two locking pieces 12.6 available. These are integrally formed in the form of webs on the inside of the two housing walls 12.4. The locking pieces 12.6 work with the coupling piece 20, in particular with Arretieraufnahmen 21.2, together.

When the coupling piece 20, starting from the in FIG. 2 shown pivoted position towards the in FIG. 1 shown tilted position is adjusted, so first slide the guide elements 22 in the guide slots 12.2. When the guide elements 22 have left the guide slots 12.2, the tension spring 35 attempts to pull the tilting element 20 into the tilted position. However, this is hindered by means of the locking pieces 12.6, which rest on the underside of the holder 21 adjacent the coupling piece 20. This operating state is in FIG. 7 shown. The guide elements 22 are now free in the receptacle 12.3. If now the coupling piece 20 is moved further, the locking pieces enter 12.6 in the locking receptacles 21.2 and the torque induced by the tension spring 35 rotates the coupling piece 20 in the dumped freewheeling position according to FIG. 1 , It can, how FIG. 6 illustrates, the piston rod 32 also be disconnected from the coupling piece 20.

As the FIGS. 1 to 3 show is in the FIGS. 4 and 5 shown arrangement housed in the housing 12.

In this case, the damping cylinder 30 is inserted into a groove-shaped receiving compartment of the housing 12. In its axial direction of the damping cylinder 30 by means of the housing walls 12.4 (see FIG. 3 ) protruding projections 12.5 fixed, which engage in an introduced into the damping cylinder 30 circumferential groove 31.

The damping cylinder 30 is further secured with molded lugs against lifting.

The FIGS. 6 and 7 let continue to recognize that the tension spring 35 is associated with an elastic element 50. In the present case, this elastic element 50 is formed by a felt strip, which is introduced into the housing 12. In this case, the elastic element 50 is placed on a wall portion 12.7 of the housing 12 and glued thereto. The elastic element 50 is arranged between the wall section 12.7 and the outer contour of the tension spring 35. The thickness of the elastic element 50 is dimensioned such that it is compressed in the space between the tension spring 35 and the wall section 12.7. In this way, the elastic element 50 exerts transverse forces on the turns of the tension spring 35 designed as a helical spring.

FIG. 6 indicates that the elastic element 50 extends in the axial direction of the tension spring 35. It may extend over the entire length of the tension spring 35 or only over part of the length of the tension spring 35. In the present case, the elastic element 50 is formed in the left-side region of the housing 12 extended beyond the tension spring 35, and underlies the coupling element 20. It can then be particularly designed so that it dampens the tilting of the coupling element 20, so that a reduced noise , The actual function of the elastic element 50 is the damping of the tension spring 35. If the tension spring 35, starting from their in the FIG. 6 shown clamping state is relaxed, so dampens the elastic element 50 lateral vibrations of the tension spring 35th

The FIG. 1 shows the coupling element 20 in its initial position. In this case, the coupling element 20 is tilted in the pivot bearing against the piston rod 32 that the both sides laterally integrally formed on the holder 21 of the coupling element 20 guide elements 22 in the two receptacles 12.3 of the guide slots 12.2. In the pivoted state while the walls of the recordings 12.3 are not affected. The tension spring 35 is in this position in her Clamping position and brings bias on the coupling element 20 such that it is held in the tilted position positively against the locking pieces 12.6.

As the FIG. 1 shows, the coupling element 20 is ready in the position shown with a driver 40 into engagement. The driver 40 may be stationary, for example, on a furniture carcass a sliding door door frame and the intake device to be moved to the sliding part (drawer, sliding door, etc.) be attached (or vice versa).

When the driver 40 strikes the first stop 25 in the direction of movement of the sliding part into the closed position, the coupling piece 20 is actively swung away from the locking pieces 12.6 (see "F" in FIG FIG. 1 ). In this case, the guide elements 22 are moved out of the receptacles 12.3 free. The coupling element 20 pivots about the pivot axis of the pivot bearing created by the bearing pin 29. The driver 40 is then entrained by the second stop 24 when the locking pieces 12.6 are out of engagement with the locking receptacles 21.2.

The subsequent retraction movement is cushioned by the damping element (damping cylinder 30) and pulled the sliding part by means of the force of the tension spring 35 in its closed position. When opening the sliding part, the coupling element 20 is pulled by the voltage applied to the second stop 24 driver 25 and in the in FIG. 1 spent freewheeling position spent. The tension spring 35 is tensioned again and the piston rod 32 is pulled out. Again, the elastic member 50 may attenuate any vibrations occurring tension spring 35. The sliding part is then out of engagement with the retraction device and can be moved further into the open position. Now it may happen that due to, for example, a malfunction, the coupling element 20 in the in FIG. 2 shown position, but the driver 40 is outside the area formed between the stops 24, 25 and before the second stop 24.

Now, if the driver 40 moves toward the second stop 24, he moves to the obliquely inclined in the direction of spring element 32. He steers this then perpendicular to the direction of movement "F" (see FIG. 1 ) in the housing 12 in from. If he has passed the second stop 24, the spring element 23 snaps back on and the driver 40 is in the correct position between the stops 24, 25 (see FIG. 2 ).

Claims (9)

Retraction device with a coupling element (20) and a fluid damper, which has a damping cylinder (30) and a piston rod (32), wherein the coupling element (20) is associated with a tension spring (35) in the form of a helical spring,
characterized,
in that an elastic element (50) acts as a vibration damper on the tension spring (35). Feeding device according to claim 1,
characterized,
in that the elastic element (50) applies a transverse force acting transversely to the spring longitudinal extension on at least part of the spring coils. Feeding device according to claim 2,
characterized,
that the elastic element (50) acts on the outer contour of the tension spring (35). Feeding device according to claim 1 or 2,
characterized,
in that the elastic element (50) is arranged in the space surrounded by the tension spring (35). Feeding device according to one of claims 1 to 4,
characterized,
in that the elastic element (50) is formed by a strip-shaped blank. Feeding device according to one of claims 1 to 4,
characterized,
that the elastic element (50) consists of a knitted or a felt material. Feeding device according to claim 6,
characterized,
that the elastic element (50) is made of water-repellent fibers. Feeding device according to one of claims 1 to 7,
characterized,
that the tension spring (35) in a spring receiving a housing (12) is arranged at least regionally,
in that the spring receptacle (35) is delimited by a wall element, and in that the elastic element (50) is arranged between the wall element and the tension spring (35). Feeding device according to claim 8,
characterized,
that the elastic element (50) is materially connected to the wall element or loosely held clamped thereto.

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