EP1501992B1 - Multi-link hinge - Google Patents

Abstract

The invention relates to a multi-link hinge ( 10 ) for hinging a door leaf ( 12 ) to the body of a piece of furniture with a body fitting which may be fixed to the support wall ( 14 ) of the body and a door leaf fitting ( 20 ) connected to the above by means of a joint mechanism. The support wall fitting, embodied as an extended support arm is arranged on a fitting plate ( 18 ) which may be fixed to the support wall of the body and coupled to the door leaf fitting, embodied as a hinge cup fitted in a recess in the back face of the door leaf ( 12 ), by means of the joint mechanism, embodied with two joint arms ( 22; 24 ) each connected to one of the fittings such as to pivot. A damping device acts on a support wall side hinge piece, for example the body fitting ( 16 ) or the fixing plate ( 18 ) and one of the joint arms ( 24 ), at least during a locking part of the pivoting motion of said joint arm on a closing or opening motion of the door leaf fitting ( 20 ).

Description

The invention relates to a universal joint hinge for articulating a door leaf on the body of a piece of furniture with a mounted on the support wall of the body mounting plate to which a trained as an elongated arm armature-body part connected to a universal joint mechanism and the door-stop member is designed as a hinge cup, wherein the universal joint mechanism two, in its central region relative to each other scissor-type pivotable articulated arms, one of which at one of its ends about a fixed axis pivotally mounted on one of the stop members and at the other end on the other stop member along a plane perpendicular to the hinge axis extending plane predetermined Space curve is coupled variable position.

In known universal joint hinges the variable position coupling of the directly pivotable articulated at one of the stop parts Gelenkarm end opposite end of this articulated arm either indirectly via an intermediate coupling link whose ends are pivotally hinged at the end of the articulated arm on the one hand on the coupling stop part on the other hand, or alternatively via a backdrop-like Sliding guide at least of the articulated arm to be coupled in a positionally variable manner on the carcass attachment part. Such universal joint hinges can also be provided with a Schnäppermechanismus unterschiealicher design be who when closing a hinged door with such a universal joint hinges on the body of a piece of furniture approaching the door leaf to the closed position after overcoming a pressure point in the closed position and hold in this holds such a universal joint hinge is known from DE 2552729C2. The impact impingement of the door leaf on the body when snapping into the closed position claimed in particular the bearing points of the hinge members jerky. Even with energetic opening of the door without its deliberate deceleration when approaching the fully open position by the person accessing the cabinet such jerky stresses can occur in the hinge, due to the comparatively large lever arm to be applied in the center of gravity of the door kinetic momentum of the door in comparison to the effective lever arms of the links of the hinge mechanism can reach a significant size.

From DE 20102998U, a universal joint hinge with a damping device is known.

The invention is based on the object to provide universal joint hinges with an integrated damping device which unfolds when approaching the door leaf at least one of its end positions a damping effect, which reduces impact stresses occurring at least to a harmless level.

Based on the known hinge hinges of the type mentioned above, this object is achieved in that the pivotable about a fixed axis mounted on or in the door leaf hinge part articulated arm at its opposite, coupled to the body-stop member pivotable about a fixed axis on or in the Carcass inside end portion of the body-stop member is mounted, that between the pivotally mounted on the body-stop member and the articulated arms approximately centrally scissor-like pivotally bearing region lying portion of this articulated arm of two by a predetermined amount relative to each other longitudinally displaceable articulated arm sections is composed, and that between the two articulated arm sections is provided at least during a part of the displacement movement of the articulated arm sections relative to each other effective damping device. By inventively provided subdivision of the positionally variable coupled to the body-stop member Gelenkarm lever arm in two relatively longitudinally displaceable articulated arm sections, the effective lever length of this lever arm during the opening and closing movement, whereby the interposition of a coupling link or the coupling via a backdrop-like sliding accordingly the prior art is not required. Due to the relative displacement of the two articulated arm sections taking place during the hinge articulation, the arrangement of the damper device between these two articulated arm sections offers itself.

The relatively movable articulated arm sections are expediently formed telescopically interlocking.

In this case, it is advantageous if the one articulated arm section is formed by an elongate cylinder which is arranged longitudinally displaceably on a piston rod forming the other articulated arm section.

The piston rod is then expediently attached integrally to the central, scissor-like manner with the other articulated arm coupled region and the longitudinally displaceable arranged on the piston rod cylinder is then pivoted in its, the inlet side of the piston rod end facing pivotally mounted on the body-stop member.

The articulated on the body-stop member end is then suitably closed, whereby at the free end of the piston rod, a piston is attached, whose diameter is substantially is equal to the clear inner diameter of the cylinder, so that the cylinder interior is divided into two mutually separated by the piston and in a relative displacement of the piston rod and cylinder in volume volume variable working spaces in which a fluid damping medium can be included. Suitable damping medium is both a gaseous medium, preferably ambient air, or a flowable viscous medium in question. The damping effect is then achieved by throttled overflow of the damping medium from the shrinking into the enlarging working space.

Fig. 1

eine Seitenansicht eines Ausführungsbeispiels eines einen Türflügel an der Tragwand eines Schrankkorpus anlenkenden, in der erfindungsgemäßen Weise ausgebildeten Kreuzgelenkscharniers in der Schließstellung des Türflügels;

Fig. 2

eine der Figur 1 entsprechende Seitenansicht, bei welcher der Türflügel in der ganz geöffneten Stellung dargestellt ist;

Fig. 3

eine Draufsicht, gesehen in Richtung des Pfeils 3 in Figur 2;

Fig. 4

eine isometrische dreidimensionale Darstellung, in welcher das erfindungsgemäße Scharnier in der auch in den Figuren 2 und 3 gezeigten Öffnungsstellung des Türflügels wiedergegeben ist;

Fig. 5

eine in der Darstellung der Fig. 3 entsprechende Draufsicht auf ein abgewandeltes Ausführungsbeispiel eines erfindungsgemäßen Kreuzgelenkscharniers; und

Fig- 6

eine Draufsicht auf ein weiter abgewandeltes drittes Ausführungsbeispiel eines erfindungsgemäßen Kreuzgelenkscharniers.

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

Fig. 1

a side view of an embodiment of a door wing on the supporting wall of a cabinet body pivoting, designed in the manner of the invention universal joint hinge in the closed position of the door leaf;

Fig. 2

a side view corresponding to Figure 1, in which the door is shown in the fully open position;

Fig. 3

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

Fig. 4

an isometric three-dimensional representation, in which the hinge according to the invention is shown in the opening position of the door leaf also shown in Figures 2 and 3;

Fig. 5

a corresponding in the illustration of Figure 3 plan view of a modified embodiment of a universal joint hinge according to the invention. and

Fig. 6

a plan view of a further modified third embodiment of a universal joint hinge according to the invention.

The universal joint hinge shown in the figures, designated in its entirety by 10 serves to direct a door leaf 12 on the support wall 14 of the body of a piece of furniture. The body-stop member 16 of the hinge is fixed in the usual manner by means of a mounting plate 18 on the support wall 14. The door stop member 20 has the also widely used form of a recess provided in a recess on the back of the door leaf 12 recess hinge cup.

The carcass-stop member and the door leaf-stop member 20 pivotally coupling universal joint mechanism is formed by two articulated arms 22 and 24, which are pivotally connected to each other in its central region by a pivot pin 26. The articulated arm 22 is pivoted on the body stop member 16 by means of a bearing pin 28 and the articulated arm 24 in the door leaf stop member 20 by means of a - not visible in the drawing figures - bearing pin. At the other oscillating end of the articulated arm 22 a coupling link 32 is pivotally connected, which in turn is pivotally mounted in the door leaf stop member 20 and which leads this end of the articulated arm 22 on a circular arc-shaped path.

The second end of the articulated arm 24 is pivoted directly by a bearing pin 34 on the body-stop member 16. The lying between the pivot pin 26 and the bearing pin 34 part of the articulated arm 24 is - deviating from the known universal joint hinges - composed of two articulated arm sections 24a and 24b, of which the hinge pin 26 pivotally coupled to the articulated arm 22 articulated arm portion 24a as a piston rod is formed, which engages longitudinally displaceable into the interior of the second designed as a cylinder articulated arm portion 24b, wherein on the cylinder inner end of the piston rod - not shown - piston is used, which ensures the sliding of the piston rod in the cylinder and inside the cylinder two separate variable by the piston Working spaces forms, which forms practically the damper chambers for the inventively provided damper assembly.

When a gas, e.g. Ambient air is used, the damping function is caused by the throttled overflow of trapped air in the working spaces of the decreasing in the increasing working space. The overflow of air can be effected by a corresponding fit of the piston in the interior of the cylinder between the piston circumference and the cylinder wall. Optionally, a channel-like depression in the circumference of the piston or a correspondingly calibrated through-bore in the piston form the throttle section. Instead of a gaseous damping medium, it is also possible to use a liquid damping medium of suitable viscosity, for example a damper oil as the damping medium, in which case the inlet region of the piston rod 24a into the cylinder 24b must be carefully sealed against leakage of the damping medium.

FIGS. 5 and 6 show two modified embodiments in comparison to the universal joint hinge 10 described above in conjunction with FIGS. 1 to 4 formed in the inventive manner universal joint hinges 10 'and 10 ", which correspond to the universal joint hinge 10 in the basic structure and function, with only the universal joint hinge 10' of the cylinder 24b and the displaceable in this piston rod 24a from its arranged in the longitudinal center plane of the hinge layer are arranged laterally offset, so that the interior of the body-stop member 16 - eg for fastening or adjusting - is accessible from above.

In the further modified universal joint hinge 10 ", a pair of cylinders 24b and piston rods 24a arranged respectively on opposite sides of the longitudinal center plane of the hinge 10" are provided.

It can be seen that within the scope of the inventive concept as defined by the following Ansprüches, further modifications and developments of the described embodiments can be realized. Thus, the arrangement of the cylinder 24b and the piston rod 24a are also interchanged with respect to the described embodiments in the sense that the free end of the piston rod 24a pivotally hinged to the inner core end portion body stop member 16 and, accordingly, the rod end facing away from the cylinder 24b at the middle scissor-like the other articulated arm 22 pivotally coupled portion of the universal joint mechanism is integrally attached.

Claims (10)

1. Universal joint hinge (10) for the articulation of a door leaf (12) on the carcass of a piece of furniture with a mounting plate (18) which is disposed on the supporting wall (14) of the carcass and on which a carcass mounting part (16) constructed as an elongated support arm is connected to a universal joint mechanism and the door leaf mounting part (20) is constructed as a hinge cup, wherein the universal joint mechanism has two joint arms (22; 24) which in their central region are pivotable relative to one another like scissors and of which each one is pivotable at one of its ends about a fixed axis on one of the mounting parts (16; 20) and at the respective other end is coupled to the respective other mounting part (20; 16) so as to be variable in position along a predetermined space curve extending in a plane lying at right angles to the pivot axis of the hinge, characterised in that the joint arm (24) which is mounted so as to be pivotable about a fixed axis on or in the door leaf mounting part (20) is mounted at its opposite end coupled to the carcass mounting part (16) so as to be pivotable about a fixed axis on or in the end region of the carcass mounting part (16) inside the carcass, that the portion of this joint arm (24) which is positioned between the region which is pivotably mounted on the carcass mounting part (16) and the region which supports the joints arms (22; 24) so that they pivot approximately centrally like scissors is composed of two joint arm portions (24a; 24b) which are longitudinally displaceable relative to one another by a predetermined amount, and that a damping device which is effective at least during a concluding part of the displacement movement of the joint arm portions relative to one another is provided between the two joint arm portions (24a; 24b).
2. Universal joint hinge as claimed in Claim 1, characterised in that the joint arm portions (24a; 24b) which are displaceable relative to one another are constructed so that they interengage telescopically.
3. Universal joint hinge as claimed in Claim 2, characterised in that one joint arm portion (24b) is formed by an elongated cylinder which is disposed so as to be longitudinally displaceable on a piston rod which forms the other joint arm portion (24a).
4. Universal joint hinge as claimed in Claim 3, characterised in that the piston rod (24a) is attached integrally on the central region which is pivotably coupled like scissors to the other joint arm (22), and that the cylinder (24b) which is disposed so as to be longitudinally displaceable on the piston rod (24a) is pivotably articulated on the carcass mounting part (16) at its end facing away from the inlet side of the piston rod (24a).
5. Universal joint hinge as claimed in Claim 4, characterised in that the end of the cylinder (24b) which is articulated on the carcass mounting part (16) is closed.
6. Universal joint hinge as claimed in any one of Claims 3 to 5, characterised in that a piston of which the diameter is substantially equal to the internal diameter of the cylinder (24b) is mounted on the free end of the piston rod (24b), and that the interior of the cylinder is divided into two working spaces which are separated from one another by the piston and vary in volume in opposite directions in the case of a relative displacement of the piston rod (24a) and the cylinder (24b), and in which a fluid damping medium is provided.
7. Universal joint hinge as claimed in Claim 3, characterised in that the cylinder (24b) is integrally attached on the central region pivotably coupled like scissors to the other joint arm (22), and that the piston rod (24a) which is disposed so as to be longitudinally displaceable in the cylinder (24b) is pivotably articulated on the carcass mounting part (16) at the free end thereof lying opposite the inlet side into the cylinder (24b).
8. Universal joint hinge as claimed in any one of Claims 3 to 7, characterised in that the aligned longitudinal central axes of the cylinder (24b) and of the piston rod (24a) lie in the longitudinal central plane of the hinge (10) extending at right angles to the pivot axis of the hinge.
9. Universal joint hinge as claimed in Claim 3 or 4, characterised in that the aligned longitudinal central axes of the cylinder (24b) and of the piston (24a) are disposed in a plane which is offset laterally from and parallel to the longitudinal central plane of the hinge (10).
10. Universal joint hinge as claimed in Claim 9, characterised in that in a second plane which is offset from and parallel to the opposing side of the longitudinal central plane of the hinge there are disposed the aligned longitudinal central axes of a second cylinder (24b) provided there and of a second piston rod (24a).

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