DOOR HINGE

Abstract

A door hinge has a first leaf assembly, a second leaf assembly and a link assembly for pivoting of the first leaf assembly on the second leaf assembly between an open position and a closed position. This link assembly in turn has a first hinge link and a second hinge link pivoted about a connecting axis on the first link. The first hinge link is formed with a contact face that in the open position flatly engages a contact face of the second hinge link. This the first contact face also is formed with a projection that in the open position engages complementarily in a recess formed in the second hinge link.

Claims

1. A door hinge comprising: a first leaf assembly, a second leaf assembly and a link assembly for pivoting of the first leaf assembly on the second leaf assembly between an open position and a closed position, the link assembly comprising a first hinge link, and a second hinge link pivoted about a connecting axis on the first link, the first hinge link having a contact face that in the open position flatly engages a contact face of the second hinge link, the first contact face also having a projection that in the open position engages complementarily in a recess of the second hinge link.

2. The door hinge according to claim 1, wherein the first hinge link is connected to the first leaf assembly so as to be pivotable about a first hinge axis, the first hinge link being pivotal about a second hinge axis positively guided on the second leaf assembly, the second hinge link being connected to the second hinge link so as to pivot about a third hinge axis that is positively guided on the first leaf assembly, the second hinge link being connected to the second leaf assembly so as to pivot about a fourth hinge axis.

3. The door hinge according to claim 2, wherein the second hinge axis is guided on the second leaf assembly in a link guide.

4. The door hinge according to claim 2, further comprising: a pivot link carrying the second hinge axis on the second leaf assembly.

5. The door hinge according to claim 4, wherein the pivot link in the open position lies flat against an outer face of the second hinge link.

6. The door hinge according to claim 5, wherein the outer face forms with the second contact face an angle α between 90° and 135°.

7. The door hinge according to claim 5, further comprising: another pivot pin connecting the pivot link to the second leaf assembly and coaxial to a pivot axis of the other pivot pin, the inner face extending in a plane extending through the axis of the other pivot pin.

8. The door hinge according to claim 4, wherein the pivot link in the closed position bears with a back face against a casing of the second leaf assembly.

9. The door hinge according to, wherein claim 1 further comprising: a hinge pin connecting the first hinge link and the second hinge link and centered on the connecting axis, the first contact face extending in a plane passing through the hinge pin.

10. The door hinge according to claim 1, wherein the first hinge link is T-shaped with a horizontal crosspiece and a central leg member, the second hinge link is O-shaped with two vertical members and two horizontal members surrounding the central leg member, and the pivot link is C-shaped.

11. The door hinge according to claim 10, wherein the projection is formed on the leg member of the first hinge link.

12. The door hinge according to claim 10, wherein the recess is formed on the vertical member and extends over not more than the half of a vertical height of the second hinge link.

Description

BRIEF DESCRIPTION OF THE DRAWING

[0029] The above and other objects, features, and advantages will become more readily apparent from the following description, reference being made to the accompanying drawing in which:

[0030] FIG. 1 is a three-dimensional view of a door hinge according to the invention;

[0031] FIGS. 2A to 2C are horizontal sections through the door hinge according to the invention in various open positions; and

[0032] FIG. 3 is a three-dimensional exploded view of the hinge link assembly of the door hinge.

SPECIFIC DESCRIPTION OF THE INVENTION

[0033] FIG. 1 shows in a three-dimensional view a door hinge according to the invention 1 having a first leaf assembly 2, a second leaf assembly 3, and a hinge link assembly 4 therebetween for relative pivoting of the first leaf assembly 2 and the second leaf assembly 3 between an open position shown in FIGS. 1 and 2C and a closed position shown in FIG. 2A. The door hinge 1 extends in a vertical direction z, a horizontal direction x, and a pressing direction y. The pivoting movement caused by the hinge link assembly 4 thus includes rotation about the vertical direction z. The amount of rotation relation to the closed position is also called the opening angle α. The opening movement enabled by the hinge link assembly is thereby not purely of a rotational nature, but further comprises also a translational or straight-line component.

[0034] The hinge link assembly 4 includes a first hinge link 5 and a second hinge link 7 pivotally connected to the first hinge link 5 about a connection axis 6. The connection between the first hinge link 5 and the second hinge link 7 is provided by a connecting pin 8 arranged on the connecting axis 6.

[0035] In FIGS. 2A to 2C the door hinge 1 according to the invention is shown in different open positions in the installed state. Here, the first leaf assembly 2 is set in an edge mortise a door panel 9a and the second leaf assembly 3 is set in am edge mortise of a door frame 9b. In FIG. 2A shown closed position (with a opening angle α of 0°) the door hinge 1 concealed between the door panel 9a and the door frame 9b. FIG. 2B shows a half-open position with an opening angle α of 90°. In the FIG. 2C open position, the door panel 9b has pivoted through a maximum opening angle α of 180° from the closed position.

[0036] As can be seen from a comparison of FIGS. 2A to 2C, the first hinge link 5 has a first contact face 10. This first contact face 10 lies in a plane 11 that extends through the connecting pin 8 and is spaced from the axis 6 by a minimum distance of less than 5 mm. The second hinge link 7 has in turn a second contact face 12 that in the FIG. 2 open position lies flatly in face contact against the first contact face 10. According to the invention a projection 13 of the first contact face 10 in the open position engages in a recess 14 of the second hinge link 7 complementarily. This face contact stabilizes the hinge link assembly 4 in the open position, and prevents thus a “springy” feel.

[0037] Here the projection 13 has a substantially rectangular cross-section formed by two side faces 13a and an upper face 13b that merge into each other at rounded corners. The side face 13a turned away from the first contact face 10 merges into an outer face of the first hinge link 5 that is in the same plane 11 as the first contact face 10.

[0038] The recess 14 of the second hinge link 7 is constructed such that in the open position it is in full surface contact against the side face 13a and cover face 13b. This ensures a multidimensional form fit.

[0039] The link assembly 4 of door hinge is of the so-called six-axis type. In it the first hinge link 5 is connected to the first leaf assembly 2 by a first hinge pin 15a for pivoting about a first hinge axis a. The first hinge link 5 is pivotal on the second leaf assembly 3 about a second hinge axis b guided in the second leaf assembly 3. A second hinge pin 15b extends through the first hinge link 5 and through the pivot link 16 and is movable in an arcuate guide on the second leaf assembly 3. The pivot link 16 is carried on another hinge pin 17 pivoted on the second leaf assembly 3 at a pivot axis e. The second hinge link 7 on the other hand is connected to the first leaf assembly 2 for pivoting about a third hinge axis c that is positively guided for straight-line movement in a guide 18. The link guide 18 has a groove 18a in which moves a slide block 18b that carries a third hinge pin 15c concentric to the third hinge axis c. The second hinge link 7 is pivotal on the second leaf assembly 3 at a fourth hinge pin 15d itself on a fourth hinge axis.

[0040] As particularly shown in FIG. 1, the first leaf assembly 2 has a first casing 2a for fastening to the door panel 9a and a two-part hinge mount 2b. The hinge mount is formed from two mirror-symmetrically formed individual parts that both form the grooves 18a for the link guide 18 as well as the seats for the first hinge pin 15a. For horizontal adjustment, the hinge link recess 2b is thereby movable via set screws 2c in the horizontal direction x.

[0041] Analogously, the second leaf assembly 3 has a second casing 3a also holding the hinge assembly 4 is held. For this purpose two inner inserts 3b are provided that hold the fourth hinge pin 15d for pivoting of the second hinge link 7 as well as the pivot pin 17 for the pivot link 16. The inner inserts 3b are movable for eccentric adjustment in the pressure direction y on a middle insert 3c. The middle insert 3c is in turn shiftable in the vertical direction z on the m second casing 3a.

[0042] As can be seen from a comparative view of FIGS. 2B and 2C, the second hinge link 7 has an outer face 19 that in the open position lies flatly in surface contact against an associated inner face 20 of the pivot link 16. The inner face 20 extends in a plane 21 extending running through the pivot axis e. On the second hinge link the outer face 19 forms with the second contact face 12 an angle μ of about 120°.

[0043] FIG. 2A shows that the pivot link 16 in the closed position rests with a back face 22 against the casing 3a of the second leaf assembly 3.

[0044] In FIG. 3 the individual components of the link assembly 4 are shown in an exploded view. There the position of the hinge axes a to d, the pivot axis e as well as of the connecting axis 6 are shown with dot-dash lines. The first hinge link 5 is T-shaped with a crosspiece 5a and an integral central leg section 5b. The second hinge link 7 is in turn 0-shaped with two vertical side members 7a and 7b and two horizontal members 7c and 7c joining the vertical bars 7a and 7b to each other horizontally. The horizontal members 7c and 7d thus embrace the middle member 5b of the first hinge link 5 in the vertical direction z. The pivot link 16 is C-shaped with a vertical bar 16a and two horizontally projecting members 16b and 16c. These embrace the end of the middle member 5b of the first hinge link 5 opposite the first vertical member 5a and are connected to it rotationally about the second hinge axis b. In the illustrated embodiment, the projection according to the invention 13 is formed on the unillustrated rear side of the middle member 5b of the first hinge link. The recess 14 is visible as a bulge on the second vertical member 7b of the second hinge link 7. While all vertical elements 5a, 7a, 7b, and 16 extend over the same height h, the projection 13 and the recess 14 are not more than half of this height.