EP4180600B1 - Hinge - Google Patents

Description

The invention relates to a door hinge with a first hinge part, a second hinge part and a hinge bracket arrangement that connects the first hinge part to the second hinge part so that it can pivot between an open position and a closed position. The hinge bracket arrangement comprises a first hinge bracket and a second hinge bracket that is connected to the first hinge bracket so that it can pivot about a connecting axis. The first hinge bracket has a first contact surface that lies flat against a second contact surface of the second hinge bracket in the open position.

Corresponding door hinges are also commonly referred to as "multi-axis hinges". Depending on the connection of the hinge bracket with the first hinge part and the second hinge part, these can be designed as five-axis hinges, six-axis hinges or seven-axis hinges. This arrangement makes it possible to construct a concealed door hinge that allows opening angles of up to 180°. Such concealed door hinges are used in particular in particularly high-quality environments.

However, the indirect force guidance through the hinge bracket arrangement also leads to a certain flexibility/compliance - especially in the opening position. Despite high-quality workmanship and the use of stable materials, a clearly defined stop cannot be achieved in all cases. The smallest product tolerances, flexible materials (e.g. in bearing bushes) and large lever ratios mean that concealed door hinges often have a "springy" feel in the opening position. Although the objective stability is not affected by this, a clear defined stop in the opening position desirable.

A typical door hinge is made of DE 20 2010 016 896 U1 known.

EP 3 176 353 B1 , EP 3 274 533 B1 and US 1 030 936 A each show a multi-joint hinge in which the hinge brackets there lie flat against each other in the opening position and form-fit against each other, forming a projection.

Against this background, the invention is based on the object of stabilizing the hinge bracket arrangement of a multi-axis joint in such a way that the haptics have a clearly defined stop in the opening position.

The subject matter of the invention and the solution to this problem is a door hinge according to claim 1. Preferred embodiments are specified in the dependent subclaims.

According to the invention, a projection protrudes from the first contact surface and a receptacle is formed on the second hinge bracket, into which the projection engages in a form-fitting manner in the open position. The form-fitting connection between the projection and the receptacle significantly improves the stability of the hinge bracket arrangement in the open position. This makes it possible to reduce elasticity in particular at the connection between the first hinge bracket and the second hinge bracket - i.e. in the area of the connecting bolt. As a result, in the open position the first hinge bracket and the second hinge bracket behave more like a rigid unit, so that the subjective stability of the door hinge in the open position is also increased.

In particular, the first contact surface is aligned approximately radially with respect to the connecting axis between the first hinge bracket and the second hinge bracket. The first hinge bracket and the second hinge bracket are preferably connected to one another by a connecting bolt so that they can pivot around the connecting axis. The first contact surface extends in particular in a plane that runs through the connecting bolt - particularly preferably through the connecting axis. The approximately radial alignment means that the first hinge bracket in the area of the first contact surface and the second hinge bracket of the second contact surface abut against one another flatly when pivoting.

Conveniently, the projection adjoins the first contact surface at an angle between 90° and 135° - preferably about 120°.

The projection, which is approximately at a right angle or at a slightly overextended angle to the first contact surface, is aligned approximately tangentially with respect to the connecting axis. Accordingly, when the two hinge brackets are pivoted, the contact surfaces there come into contact with a shearing movement that runs almost parallel to the contact planes. In combination with the contact on the first and second contact surfaces, this provides a defined stop for the first hinge bracket and the second hinge bracket, which also causes slight tension in the radial direction due to the almost tangential contact surface on the projection. This reduces the bearing play - especially on the connecting axis - and increases the stability of the combination of the first hinge bracket and the second hinge bracket.

According to the invention, the door hinge is designed as a multiple joint, in particular in a five-axis, six-axis or seven-axis construction. The first hinge bracket is arranged on the first hinge part so that it can pivot about a first hinge axis. Furthermore, the first hinge bracket is guided so that it can rotate about a second hinge axis that is positively guided on the second hinge part. The second hinge bracket is held so that it can rotate about a fourth hinge axis on the second hinge part and a third hinge axis that is positively guided on the first hinge part is guided so that it can rotate.

When the door hinge pivots between the opening position and the closing position, the hinge bracket arrangement shifts relative to the two hinge parts, with the second hinge axis and the third hinge axis being moved along the respective positive guides. These shifts are coordinated by a relative pivoting of the first hinge bracket relative to the second hinge bracket - and the associated change in distance between the first hinge axis and the fourth hinge axis or the second hinge axis and the third hinge axis. The first hinge axis, the second hinge axis, the third hinge axis, the fourth hinge axis and the connecting axis are aligned parallel to one another - in particular in the vertical direction.

Within the scope of the invention, it is particularly possible for the third hinge axis to be positively guided on the first hinge part in a slotted guide. This can be designed in particular to be linear - although the invention does not have to be restricted to such embodiments. According to the invention, the second hinge axis is positively guided on the second hinge part with a pivot lever. Optionally, the third hinge axis can also be positively guided on the first hinge part with a pivot lever. The respective The pivot lever is held on the corresponding hinge part about a pivot axis aligned parallel to the hinge axes and the connecting axis, thereby causing a circular arc-shaped forced guidance of the associated hinge axis.

According to the invention, the second hinge axis is positively guided on the second hinge part with a swivel arm. When a first hinge bracket is combined with a swivel arm, the stabilization according to the invention can be particularly effective. In the past, a particularly soft and "springy" stop was often established, particularly in designs with six or seven axes (connecting axis, hinge axes and swivel axes). Such embodiments in particular benefit from the additional stabilization within the scope of the present invention.

According to the invention, the swivel arm rests flatly with an inner surface on an outer surface of the second hinge bracket in the open position. This flat contact creates additional support and definitely limits the swivel movement of the swivel arm.

Particularly preferably, the outer surface of the second hinge bracket forms an angle between 90° and 135°, preferably about 120°, with the second contact surface. As a result, the second hinge bracket is enclosed three times in the opening position to be stabilized, namely by the flat swivel arm, the first contact surface of the first hinge bracket which adjoins it at an angle, and finally the projection of the first hinge bracket which adjoins it at an angle. In the opening position, the second hinge bracket is enclosed in a C-shape, so that a secure locking is achieved. In addition to the Wear that the contact between the projection and the receptacle can cause a tension and/or displacement of the first hinge bracket in the direction of the connection axis. In such a design, the swivel arm is pressed against the stop of the inner surface and outer surface, so that under this tensioning force a particularly secure and stable connection is created between the first hinge bracket, second hinge bracket and swivel arm. As a result, the three components stabilize themselves into a single rigid assembly, which significantly promotes the stabilization of the entire door hinge in the opening position.

According to a particularly preferred embodiment, the inner surface of the swivel arm extends in a plane which runs through a swivel bolt connecting the swivel arm to the second band part, in particular through the swivel axis. The inner surface, like the outer surface, is particularly flat. This radial alignment means that the stop between the inner surface and the outer surface occurs in the direction of the swivel movement. In the event of an additional load - for example due to a pull in the direction of the connecting axis generated by the interaction between the projection and the holder - no lateral displacement or tension - i.e. radial to the swivel axis - is to be expected. This design makes it possible to set an exact maximum opening angle of the opening position.

The maximum opening angle can be precisely determined by the inventive stabilization of the opening position. This is preferably between 135° and 180°, in particular between 170° and 180°. According to a particularly preferred embodiment of the invention, the maximum opening angle of the door hinge is determined with an accuracy of less than 3° in a range between 175° and 180°. In particular, the size of the door leaf and any structures mounted on it, such as door handles, must be taken into account in such a way that a collision with the wall surface surrounding the door is safely avoided.

Preferably, it is provided that the first band part has a first receiving body on which the hinge bracket arrangement is received and the second band part has a second receiving body on which the hinge bracket arrangement is also received.

According to a preferred embodiment of the invention, the swivel arm rests against the second receiving body with a back surface in the closed state. This also stabilizes the hinge bracket arrangement in the closed position.

According to a particularly preferred embodiment, the first hinge bracket is T-shaped and the second hinge bracket is O-shaped. The first hinge bracket has a vertical beam and a central section that projects horizontally from it. The second hinge bracket is made of two vertical beams that are connected to one another in the horizontal direction by an upper and a lower connecting section. The central section of the first hinge bracket passes through the opening surrounded by the second hinge bracket. A connecting bolt that is concentric about the connecting axis passes through the second hinge bracket at the connecting sections and the first hinge bracket at the central section. The vertical beams of the first band part of the second band part preferably have the same height.

According to a particularly preferred embodiment, the swivel arm C-shaped with a vertical beam and two holding sections that protrude horizontally from the vertical beam. The holding sections encompass one end of the middle section of the first hinge bracket and are connected to it in a rotationally movable manner - with a second hinge pin arranged concentrically around the second hinge axis.

According to a preferred embodiment, the holding sections at least partially form an inner surface for contact with the second hinge bracket. The ends of the holding sections expediently have a protruding thickening, which particularly preferably engages in an associated recess on the outside of the second hinge bracket in the open position. As a result, the hinge bracket arrangement forms a form-fitting unit made up of a first hinge bracket, a second hinge bracket and a swivel arm, which nestle against one another in a form-fitting manner on several contact surfaces running in different directions.

To reduce friction, the hinge axes, the connecting axes and any pivot axes are preferably supported by means of bearing bushes or sliding blocks on the hinge bracket arrangement and/or the band parts. These are preferably made of a plastic material and in particular are provided with a friction-reducing component - for example a PTFE coating.

In principle, it is sufficient for the implementation of the invention if only the first hinge bracket has a projection which engages in an associated receptacle of the second hinge bracket. However, within the scope of the invention, it is also possible for a projection to be arranged additionally on the second hinge bracket, which - in the area of the first band part - engages in an associated receptacle of the first hinge bracket. In this way, the stabilizing effect can be achieved both in the contact area with the first band part and with the second band part.

The present invention is particularly well suited for asymmetrically constructed door hinges. The stabilization according to the invention can particularly preferably be used on a (second) hinge part, which provides a positive guide with the aid of a swivel arm. The second hinge part can also be optimized with regard to a particularly low installation depth. A positive guide of a (fourth) hinge axis can be implemented on the corresponding first hinge part, in particular via a linear guide. The first hinge part has a greater installation depth than the second hinge part. The first hinge part can particularly preferably have an installation depth which corresponds to at least twice the installation depth of the second hinge part. Additional stabilization in the area of the first hinge part is not required.

Fig. 1

eine dreidimensionale Darstellung eines erfindungsgemäßen Türbandes,

Figuren 2A bis 2C

einen Horizontalschnitt des erfindungsgemäßen Türbandes in verschiedenen Öffnungspositionen und

Fig. 3

eine dreidimensionale Explosionsdarstellung der Scharnierbügelanordnung des Türbandes.

The invention is explained below with reference to drawings which merely represent an embodiment. They show schematically

Fig. 1

a three-dimensional representation of a door hinge according to the invention,

Figures 2A to 2C

a horizontal section of the door hinge according to the invention in different opening positions and

Fig. 3

a three-dimensional exploded view of the hinge bracket arrangement of the door hinge.

The Fig. 1 shows in a three-dimensional representation a door hinge 1 according to the invention with a first hinge part 2, a second hinge part 3 and a first hinge part 2 with the second hinge part 3 between a - in Fig. 1 and Fig. 2C shown - opening position and one - in Fig. 2A The door hinge 1 extends in a vertical direction z as well as in a lateral direction x and a pressure direction y. The pivoting movement caused by the hinge bracket arrangement 4 includes a rotation about the vertical direction z. The amount of this rotation in relation to the closed position is also referred to as the opening angle α. The opening movement made possible by the hinge bracket arrangement is not purely rotational in nature, but also includes a translational component.

The hinge bracket arrangement 4 comprises a first hinge bracket 5 and a second hinge bracket 7 pivotally connected to the first hinge bracket 5 about a connecting axis 6. The connection between the first hinge bracket 5 and the second hinge bracket 7 is provided by a connecting bolt 8 arranged about the connecting axis 6.

In the Figures 2A to 2C The door hinge 1 according to the invention is shown in different opening positions in the installed state: The first hinge part 2 is mounted in a front-side recess of a door leaf 9a and the second hinge part 3 in a reveal-side recess of a door frame 9b. In the Fig. 2A In the closing position shown (with an opening angle α of 0°), the door hinge 1 is concealed between the door leaf 9a and the door frame 9b. Fig. 2B shows a half-open position with an opening angle α of 90°. In the Fig. 2C is the Opening position is shown in which the door leaf 9 is pivoted through a maximum opening angle α of 180° relative to the closed position.

How to compare the Figures 2A to 2C can be seen, the first hinge bracket 5 has a first contact surface 10. The first contact surface 10 extends in a plane 11 which runs through the connecting bolt 8 and has a minimum distance of less than 5 mm from the connecting axis 6. The second hinge bracket 7 in turn has a second contact surface 12 which in the Fig. 2C shown opening position lies flat against the first contact surface 10. According to the invention, a projection 13 protrudes from the first contact surface 10, which in the opening position engages in a positive fit in a receptacle 14 of the second hinge bracket 7. This flat contact stabilizes the hinge bracket arrangement 4 in the opening position, thus preventing a "springy" feel.

In the exemplary embodiment, the projection 13 is designed with a substantially rectangular cross-section, two side surfaces 13a and a cover surface 13b, which adjoin one another with rounded edges. The side surface 13a facing away from the first contact surface 10 is adjoined by an outer surface of the first hinge bracket 5, which also extends in the same plane 11 as the first contact surface 10.

The receptacle 14 of the second hinge bracket 7 is designed and arranged such that in the open position it rests over its entire surface on a side surface 13a and cover surface 13b. This creates a large-area contact that provides positive support in several spatial directions.

The door hinge 1 shown in the embodiment has a so-called six-axis hinge bracket arrangement 4. The first hinge bracket 5 is pivotably connected to the first hinge part 2 by a first hinge pin 15a about a first hinge axis a. The first hinge bracket 5 is pivotably connected to the second hinge part 3 by a second hinge axis b which is positively guided on the second hinge part 3. For this purpose, the first hinge bracket 5 is penetrated by a second hinge pin 15b which is positively guided in a circular arc on the second hinge part 3 by a pivot arm 16. The pivot arm 16 is pivotally connected to the second hinge part 3 by a pivot pin 17 about a pivot axis e. The second hinge bracket 7, on the other hand, is pivotally connected to the first hinge part 2 about a third hinge axis c which is positively guided linearly in a slotted guide 18. The link guide 18 has a groove 18a in which a slotted nut 18b is guided, which receives a third hinge pin 15c arranged concentrically around the third hinge axis c. The rotatable connection of the second hinge bracket 7 to the second hinge part 3 is made via a fourth hinge pin 15d arranged concentrically around a fourth hinge axis.

How to use the Fig. 1 can be seen, the first hinge part 2 has a first base body 2a for fastening to a door leaf 9 and a two-part hinge bracket holder 2b arranged therein. The hinge bracket holder is formed from two mirror-symmetrical individual parts, which form both the groove 18a of the link guide 18 and the holder for the first hinge pin 15a. To provide lateral adjustment, the hinge bracket holders 2b can be moved in the lateral direction x via adjusting screws 2c.

In an analogous manner, the second band part 3 has a second base body 3a in which the hinge bracket arrangement 4 is held. For this purpose, two inner inserts 3b are provided which hold the fourth hinge pin 15d for the rotatable mounting of the second hinge bracket 7 and the pivot pin 17 for the pivot arm 16. The inner inserts 3b are held on a middle insert 3c with an eccentric adjustment in the pressure direction y. The middle insert 3c is in turn guided on the second base body 3a so as to be adjustable in the vertical direction z.

How to compare the Figures 2B and 2C As can be seen, the second hinge bracket 7 has an outer surface 19 which, in the open position, lies flat against an associated inner surface 20 of the swivel arm 16. The inner surface 20 extends in a plane 21 which runs through the swivel axis e. On the second hinge bracket, the outer surface 19 forms an angle β of approximately 120° with the second contact surface 12.

From the Fig. 2A It can be seen that the pivot arm 16 in the closed position rests with a back surface 22 on the receiving body 3a of the second band part 3.

In the Fig. 3 the individual components of the hinge bracket arrangement 4 are shown as an exploded view. The position of the hinge axes a to d, the pivot axis e and the connecting axis 6 are shown with dotted lines. The first hinge bracket 5 is T-shaped with a side beam 5a and an adjoining middle section 5b. The second hinge bracket 7 is in turn O-shaped with two vertical beams 7a, 7b and two connecting the vertical beams 7a, 7b to each other in the horizontal direction. Horizontal sections 7c, 7d. The horizontal sections 7c, 7d encompass the central section 5b of the first hinge bracket 5 in the vertical direction z. The pivot lever 16 has a C-shaped configuration with a vertical beam 16a and two encompassing sections 16b, 16c projecting laterally from it. These encompass the end of the central section 5b of the first hinge bracket 5 opposite the first vertical beam 5a and are connected to it in a rotational manner about the second hinge axis b. In the exemplary embodiment shown, the projection 13 according to the invention is formed on the non-visible rear side of the central section 5b on the first hinge bracket. The receptacle 14 is visible as a bulge on the second vertical beam 7b of the second hinge bracket 7. While all the vertical beams 5a, 7a, 7b, 16a extend over the same height h, the projection 13 and the receptacle 14 make up no more than half of this height.

Claims (8)

1. A door hinge (1) with a first hinge part (2), a second hinge part (3) and a hinge bracket assembly (4) connecting the first hinge part (2) to the second hinge part (3) so as to be pivotable between an open position and a closed position, wherein the hinge bracket assembly (4) has a first hinge bracket (5) and a second hinge bracket (7) connected to the first hinge bracket (5) so as to be pivotably movable about a connecting axis (6) and wherein the first hinge bracket (5) has a first contact surface (10), which abuts in a flat manner against a second contact surface (12) of the second hinge bracket (7) in the open position, wherein a protrusion (13), which engages in a positive manner with a receptacle (14) of the second hinge bracket (7) in the open position, protrudes on the first contact surface (10), wherein the first hinge bracket (5) is connected to the first hinge part (2) so as to be pivotable about a first hinge axis (a), wherein the first hinge bracket is pivotably connected to a second hinge axis (b), which is positively guided on the second hinge part, wherein the second hinge bracket (7) is pivotably connected about a third hinge axis (c), which is positively guided on the first hinge part (2) and wherein the second hinge bracket (7) is connected to the second hinge part (3) so as to be pivotable about a fourth hinge axis (d), characterized in that the second hinge axis (b) is guided on the second hinge part (3) by means of a pivot arm (16) and that the pivot arm (16) abuts in a flat manner with an inner surface (20) against an outer surface (19) of the second hinge bracket (7) in the open position.
2. The door hinge (1) according to claim 1, characterized in that the outer surface (19) draws an angle β of between 90° and 135°, preferably approximately 120°, with the second contact surface (12).
3. The door hinge according to claim 1 or 2, characterized in that the pivot arm (16) is connected to the second hinge part (3) by means of a pivot pin (17) formed concentrically around the pivot axis (e) and that the inner surface (20) extends in a plane (21), which runs through the pivot pin (17), in particular through the pivot axis (e).
4. The door hinge (1) according to one of claims 1 to 3, characterized in that the pivot arm (16) abuts with a back surface (22) against a receiving body (3a) of the second hinge part (3) in the closed position.
5. The door hinge (1) according to one of claims 1 to 4, characterized in that the first hinge bracket (5) and the second hinge bracket (7) are connected by means of a hinge pin (8) arranged around the connecting axis (6) and that the first contact surface (10) extends in a plane (11), which runs through the hinge pin (8).
6. The door hinge (1) according to one of claims 1 to 5, characterized in that the first hinge bracket (5) is formed in a T-shaped manner with a lateral beam (5a) and a middle section (5b) adjoining thereon, the second hinge bracket (7) is formed in an O-shaped manner with two vertical beams (7a, 7b) and two horizontal sections (7c, 7d) encompassing the middle section and the pivot arm (16) is formed in a C-shaped manner.
7. The door hinge (1) according to claim 6, characterized in that the protrusion (13) is formed on the middle section (5b) of the first hinge bracket (5).
8. The door hinge (1) according to claim 6 or 7, characterized in that the receptacle (14) - on a vertical beam (7b) - extends over no more than half of the vertical height (h) of the second hinge bracket (7).

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