Hinge

Abstract

The invention relates to a door hinge (1) comprising a first hinge part (2) and a second hinge part (3) pivotally connected to the first hinge part (2). The first hinge part (2) has a first adjustment partner (5) and a second adjustment partner (7, 7') that is adjustable relative to the first adjustment partner (5) in an adjustment direction (6). An eccentric (8) is rotatably mounted on the first adjustment partner (5) about an eccentric axis (3) and engages in the second adjustment partner (7, 7'). According to the invention, the eccentric (8) is guided in the first adjustment partner (5) by a thread (5a, 8b).

Description

[0001] The invention relates to a door hinge comprising a first hinge part and a second hinge part pivotally connected to the first hinge part. The first hinge part has a first adjustment partner and a second adjustment partner that is adjustable relative to the first adjustment partner in one adjustment direction. An eccentric is rotatably mounted on the first adjustment partner about an eccentric axis and engages with the second adjustment partner.

[0002] Door hinges serve to pivotally connect a door leaf to a door frame surrounding a door opening. The first and second hinge parts are attached to the door leaf and the door frame, respectively, by means of a force-fit connection. This pivoting connection allows the door leaf to pivot between a closed position that at least partially closes the door opening and an open position that releases the door opening. Within the scope of the invention, the pivoting connection between the first and second hinge parts can be designed in any way. For example, designs are known in which the first and second hinge parts are connected by a hinge pin arranged concentrically around a hinge axis. However, the invention is equally applicable to other hinge designs – in particular, so-called multi-joint hinges.These have at least two hinge brackets connected to each other in a pivotable manner, which are pivotally held and / or guided on the first band part and the second band part.

[0003] Tolerances arise during the manufacture and installation of doors and hinges, which must be compensated for to ensure precise positioning of the door leaf in the doorway. Wear and settling can also be compensated for using adjustment mechanisms. These typically include vertical adjustment, lateral adjustment, and pressure adjustment. Since a door leaf is usually attached to the door frame with at least two hinges arranged vertically, one above the other, adjusting multiple hinges differentially can also tilt the door leaf.

[0004] To provide an adjustment mechanism, one of the two hinge parts is designed to have two adjustment components. One of these components can be fixed (directly or indirectly) to a door leaf or door frame, while the other is pivotally connected to the other hinge part. A relative displacement of the two adjustment components against each other effectively shifts the hinge and door frame relative to each other in the direction of adjustment. To provide multi-axis adjustment, several adjustment mechanisms (effective in different directions) can be sequentially actuated on one hinge part, and / or adjustment options can be provided on both hinge parts.

[0005] To enable precise adjustment of the first adjusting element relative to the second adjusting element in the adjustment direction, these elements are typically equipped with a drive. The invention is based on a design with an eccentric as the drive. Because the mechanical coupling of the eccentric, mounted on the first band section, to the second band section is offset from the eccentric axis – i.e., eccentric – a rotational movement of the eccentric can be directly converted into a linear displacement of the first adjusting element relative to the second adjusting element in the adjustment direction.

[0006] Such eccentrics are known from the prior art. However, a difficulty arises here: a force applied to the two adjusting components in the direction of adjustment can also be converted into a rotational movement of the eccentric. Accordingly, in the past, it was always essential to implement locking mechanisms that inhibit or lock relative movement between the two adjusting components and are only released for the purpose of adjustment. For this purpose, clamping screws were often used, which clamp the first and second adjusting components against each other perpendicular to the direction of adjustment, thereby creating a frictional locking mechanism. Nevertheless, two separate tools are required for adjustment – ​​one for loosening the clamping screws and one for operating the eccentric – to prevent the eccentric from shifting under the influence of a counterforce after the clamping screws are loosened or tightened.

[0007] From IT TV20 100 033 A1 and DE 44 18 082 C1 adjustable door hinges are known in which an adjusting eccentric with a thread is received in an adjusting partner.

[0008] Against this background, the invention aims to simplify the design and operation of a linear adjustment mechanism on a door hinge.

[0009] The subject 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.

[0010] Based on the generic door hinge, the invention provides that the eccentric is guided on the first adjustment partner by a thread. The use of a thread according to the invention has several advantages. On the one hand, this increases the contact area between the eccentric and the first adjustment partner compared to a simple bushing bearing. This results in greater self-locking of the eccentric, so that it can hold the door hinge in position, at least temporarily, without additional locking means. Additionally, lateral forces (in the adjustment direction) on the eccentric cause the thread to tilt, which further increases the self-locking. For the purpose of adjusting the door hinge, this second aspect can be eliminated by aligning the eccentric precisely with its axis – particularly using an adjustment tool.As a further aspect, the rotational movement of the eccentric can be detected and / or influenced by its linear positioning in the direction of the eccentric axis within the framework of the inventive design. Due to the improved self-locking of the eccentric, it can absorb the forces at least temporarily, so that the adjustment can be locked between the first and second adjusting partners without the need to explicitly hold the eccentric under force. Instead, the eccentric can first be precisely adjusted with a single tool, and then any clamping devices can be activated with the same tool. This significantly simplifies the adjustment of the door hinge.

[0011] According to the invention, the eccentric has a cylindrical threaded section with an external thread that engages in a threaded bore of the first adjusting component, which has an internal thread. Only minor modifications are required during the manufacture of the hinge. Both the first adjusting component and the eccentric can be manufactured almost unchanged from a standard hinge. The components intended for forming the thread only need to be dimensioned slightly differently and provided with appropriate thread forms.

[0012] According to the invention, the cylindrical threaded section need not be perfectly cylindrical, but may have deviations from this, in particular flattened sections. One or more flattened sections arranged regularly on the outside of the cylindrical section can be used, in particular, as engagement points for a holding or turning tool during assembly. Furthermore, the flattened sections can also serve as a clearly visible indicator of the eccentric's rotational position.

[0013] According to the invention, an engagement section, eccentrically shaped with respect to the eccentric axis, is connected to the threaded section and engages with the second adjusting partner. The engagement section and the threaded section preferably connect directly to each other in the direction of the eccentric axis. The eccentric design of the engagement section enables the basic functionality of the eccentric, which converts a rotary movement into a linear movement.

[0014] To save material, the engagement section can be designed as a thin collar with a thickness of no more than 2 mm. The outer surface of the collar can then engage with the second adjusting partner.

[0015] According to the invention, the engagement section has a rounded, in particular arc-shaped or circular, outer shape. The arc shape enables a smooth and stepless rotary movement without intermediate resistance when in contact with a straight contact surface of the second adjusting partner.

[0016] The engagement section, which is particularly designed as a collar, may preferably have chamfered flanks. These flanks are inclined at an angle of approximately 45° to the eccentric axis. The engagement section – at least outside the chamfered flanks – lies entirely on one side of a central plane passing through the eccentric axis.

[0017] According to the invention, the eccentric has a tool holder, in particular an internal hexagon or internal hexagon socket. A suitable adjusting tool can be inserted into the tool holder to actuate the eccentric. Rotating this tool adjusts the eccentric, thereby causing an adjustment movement of the first adjusting partner and the second adjusting partner. Preferably, a clamping element associated with the eccentric adjustment and / or one or more adjustment mechanisms in other spatial directions have a similar tool holder. This makes it possible to operate several of these adjustments and / or locking mechanisms with the same adjusting tool. Due to the improved self-locking mechanism according to the invention, a single adjusting tool is sufficient, which can be inserted between the tool holder of the eccentric and the tool holder of an associated clamping device.

[0018] According to the invention, the tool holder has an axis of symmetry in the direction of which the associated adjusting tool can be inserted and around which a rotary movement is transmitted during actuation.

[0019] According to the invention, the axis of symmetry of the tool holder is arranged eccentrically to the eccentric axis. In particular, the axis of symmetry is offset in the direction of the engagement section.

[0020] According to the invention, the axis of symmetry of the tool holder is arranged centrally between the eccentric axis and the center axis of a circular segment-shaped outer surface of the engagement section. Due to the additional lever arm, the eccentric arrangement allows a greater torque to be transmitted to the eccentric. Furthermore, when the eccentric is actuated, the linear movement of the axis of symmetry with respect to the second adjustment partner—which must be engaged by the manufacturer's tool—is reduced. This allows the engagement hole to be made smaller, resulting in increased stability and a more compact design.

[0021] Preferably, the hinge has a first stop that limits the movement of the eccentric towards its axis up to a first extreme position. This stop prevents the eccentric from moving beyond this first extreme position. Due to the fixed coupling provided by the thread, the rotational movement of the eccentric is also limited along with its linear range of motion. The position of this first extreme position can be set very precisely.

[0022] The first stop is preferably positioned such that the engagement section is located in the first extreme position in the direction of adjustment. This eliminates the common problem that, with eccentric adjustments, rotation beyond a dead center leads to an unusual return of both adjusting components. The stop thus provides the operator with clear feedback that further adjustment is no longer possible.

[0023] Preferably, the door hinge also has a second stop, which limits the movement of the eccentric towards the eccentric axis opposite to the first stop up to a second end position. Linear and rotational movement can thus be restricted to a defined range. In this second end position, the engagement section of the eccentric is arranged in a second extreme position with respect to the direction of adjustment – ​​opposite to the first extreme position.

[0024] The first stop and / or the second stop can be formed, in particular, by the contact surfaces of the first or second adjustment partner. These stop surfaces can also be formed by further assemblies connected to the first or second adjustment partner. This is not limited to components of the door hinge. For example, the door hinge can be designed such that the first hinge part can be fixed to the contact surface of a door leaf or door frame, and that the stop is formed by at least a portion of this contact surface when installed.

[0025] The first and second adjusting partners are preferably guided linearly against each other in the adjustment direction. This forced guidance ensures that the two adjusting partners can only move relative to each other in the adjustment direction. Thus, the rotary drive of the eccentric is reliably converted into a linear displacement along the adjustment direction.

[0026] The first adjusting partner preferably rests with its first contact surface against a second contact surface of the second adjusting partner. This arrangement already provides support perpendicular to the contact surfaces.

[0027] In particular, the first and second contact surfaces extend – at least partially – perpendicular to the eccentric axis. The contact surfaces can also be used to lock the adjustment mechanism by means of clamping screws guided parallel to the eccentric axis.

[0028] According to a particularly preferred embodiment, a projection oriented in the adjustment direction is formed on the first contact surface, which engages positively in a corresponding groove in the second contact surface, and / or a projection oriented in the adjustment direction is formed on the second contact surface, which engages positively in a corresponding groove in the first contact surface. While the contact of two flat surfaces provides support that is undefined in two spatial directions, the positive engagement of a projection in a corresponding groove results in the desired guidance. The groove can be formed particularly simply as a triangular cross-section – especially in the form of an isosceles triangle. This can be produced easily and precisely both in castings and by machining.

[0029] To provide positive guidance, the projection is advantageously designed such that it is supported on both sides at the contact between the first and second contact surfaces in the groove. Preferably, the projection completely fills the cross-section of the groove.

[0030] Preferably, a groove is formed on the second adjustment partner, into which the eccentric engages. The groove is preferably oriented perpendicular to the adjustment direction.

[0031] According to a particularly preferred embodiment of the invention, the groove has at least one stop surface for limiting the rotational movement of the eccentric. For this purpose, the groove is particularly D-shaped.

[0032] The invention is explained below with reference to figures illustrating only one embodiment. These figures schematically show: Fig. 1 a three-dimensional view of a door hinge according to the invention, Fig. 2 a three-dimensional representation accordingly Fig. 1 with a first band section shown as an exploded view, Fig. 3A, 3B; detailed views of an eccentric according to the invention, Fig. 4; a rear view of a second adjusting partner according to the invention, Fig. 5; a view corresponding to Fig. 4 In a further embodiment of the second adjusting partner according to the invention, Figs. 6A and 6B show two sectional views in different adjusting positions of the second adjusting partner. Fig. 5 with the eccentric according to the invention.

[0033] The Fig. 1 Figure 1 shows a door hinge 1 according to the invention, comprising a first hinge part 2 and a second hinge part 3 pivotally connected to the first hinge part 2. In the illustrated embodiment, the pivotable connection is provided by a hinge bracket arrangement 4 in a so-called six-axis design. The door hinge 1 extends in a lateral direction x, a pressure direction y, and a vertical direction z.

[0034] The first belt section 2 has a first adjustment partner 5 and a second adjustment partner 7 that is adjustable in an adjustment direction 6 (parallel to the pressure direction y) relative to the first adjustment partner 5. As can be seen from the exploded view from Fig. 2 As can be seen, an eccentric 8 is rotatably mounted on the first adjustment partner 5 about an eccentric axis a, which engages with the second adjustment partner 7. As can be seen from the Fig. 4 As can be seen from the figures, a vertically extending groove 7a is formed on the rear side of the second adjusting partner 7, into which an engagement section 8a projects in a form-fitting manner when assembled. According to the invention, the eccentric 8 is guided in the first adjusting partner 5 by a thread 8b, 5a. For this purpose, the eccentric 8 has a cylindrical threaded section 8b formed concentrically around the eccentric axis a, which engages in a threaded bore 5a of the first adjusting partner 5, which is provided with an internal thread. The cylindrical threaded section 8b is provided laterally with two flattened surfaces 8c, as can be seen from the detailed views in the figures. Fig. 3A und 3B can be seen

[0035] In the direction of the eccentric axis a, an engagement section 8a, which is eccentrically shaped with respect to the eccentric axis a, adjoins the threaded section 8b and engages the second adjusting partner 7. In the illustrated embodiment, the engagement section 8a has a rounded outer shape with an outer surface that is semicircular around a central axis b. The radius of the outer surface around the central axis b is approximately one quarter to one third of the radius of the threaded section 8b around the eccentric axis a.

[0036] To save material, the engagement section 8a is designed as a narrow collar with chamfered flanks 8d. The engagement section 8a extends almost completely – with the exception of a small part of the chamfered flanks 8d – on one side with respect to a central plane 9 of the eccentric 8, which runs through the eccentric axis a and intersects the flattened sections 8c perpendicularly.

[0037] In the illustrated embodiment, the eccentric 8 has a tool holder 8e in the form of an internal hexagon. The axis of symmetry c of the tool holder 8e is arranged centrally between the eccentric axis a and the center axis b of the rounded outer surface.

[0038] How to approach a comparative analysis of Fig. 2 and 4As can be seen, the first adjusting partner 5 and the second adjusting partner 7 are linearly guided against each other in the adjustment direction 6. The first adjusting partner 5 has a first contact surface 5b, which bears flat against a second contact surface 7b of the second adjusting partner 7. The first contact surface 5b and the second contact surface 7b are aligned perpendicular to the eccentric axis a. To improve the positive guidance, the second contact surface 7b has a triangular cross-section and locally two-part projection 7c, which engages positively in a corresponding groove 5c of the first adjusting partner 5, thereby providing positive guidance in the adjustment direction 6.

[0039] To lock the eccentric adjustment effective in the pressure direction y - adjustment direction 6 - a clamping screw 10 is provided, which engages the second adjustment partner 7 at an elongated hole 7d and can be clamped against an internal thread 5d of the first adjustment partner 5.

[0040] In the illustrated embodiment, the first adjustment element is designed as an intermediate piece, which is guided in a base body 2a of the first hinge part 2 so as to be adjustable in the vertical direction z. For this purpose, the first adjustment element 5 accommodates two set screws 11, which can be moved against corresponding wedge surfaces 12 of the first hinge receptacle 2a. Vertical locking screws 13 are provided for locking, which extend through the first adjustment element 5 at vertically oriented elongated holes 5e and engage in corresponding internal threads 14 of the hinge base body 2a. Thus, in this embodiment, the first hinge part 2 provides two mutually perpendicular adjustment options – in the pressure direction y and in the vertical direction z.

[0041] In the exemplary embodiment, the door hinge 1 is designed as a concealed door hinge with a six-axis hinge bracket arrangement 4. This arrangement comprises a first hinge bracket 4a, which is pivotably mounted about a vertical axis on the second adjustment partner 7 and a further second adjustment partner 7', which is designed in a mirror-symmetrical manner. A second hinge bracket 4c, pivotally connected to the first hinge bracket 4a about a connecting axis 4b, is connected to the second adjustment partners 7, 7' of the first hinge part 2 about a vertical axis that is movable by a pivot arm 4d.

[0042] The second hinge part 3 has a second base body 3a for attachment to a door leaf or door frame. A two-part insert 3b is guided within this base body so as to be slidable in the lateral direction x, and this insert accommodates the hinge bracket assembly 4. The second hinge bracket 4c is pivotally connected to the two-part insert 3b about a vertically extending axis. The connecting axis with the first hinge bracket 4a is guided linearly on the two-part insert 3b by a cam guide. Two adjusting screws 3c between the two-part insert 3b and the second base body 3a are used to adjust the hinge 1 in the lateral direction x.

[0043] The Fig. 5 Figure 1 shows a second adjusting partner 7' according to a further embodiment. This differs from the second adjusting partner 7 according to Figure 2. Fig. 4 exclusively through the design of the vertically extending groove 7a', which is provided for the engagement of the eccentric 8. According to the exemplary embodiment from Fig. 5 The vertical groove 7a' is D-shaped with two vertically extending side surfaces 15, a rounded underside 16 and a horizontally and straight top surface 17.

[0044] The functionality is explained in the Fig. 6A und 6B depicted. This shows the Fig. 6A a so-called neutral position or "basic position". The eccentric 8 is positioned with its engagement section 8a within the groove 7a'. The flanks of the engagement section 8a rest against the side surfaces 15 and the rounded part of the engagement section 8a rests against the rounded underside 16 with clearance. This ensures that the second adjustment partner 7' is positioned without play in the adjustment direction 6 by the eccentric 8.

[0045] The Fig. 6BFigure 1 shows an adjusted position in which the eccentric 8 is rotated 90° counterclockwise. This shifts the second adjustment partner 7' by an amount d relative to the basic position indicated by the dashed / dash-dotted lines in the adjustment direction 6. In this position, the rounded surface of the eccentric 8 rests against one of the two side surfaces 15. Simultaneously, the horizontally formed upper surface 17 serves as a stop surface, which, in conjunction with the positive guidance in the adjustment direction 6, prevents further rotation of the eccentric in the same direction. This limits the rotational movement of the eccentric to the usable angular range of 180°.

Claims

1. A door hinge (1) with a first hinge part (2) and a second hinge part (3), which is connected to the first hinge part (2) in a pivotably movable manner, wherein the first hinge part (2) has a first adjustment partner (5) and a second adjustment partner (7, 7'), which is adjustable in an adjustment direction (6) with respect to the first adjustment partner (5), wherein an eccentric (8), which engages with the second adjustment partner (7, 7'), is mounted on the first adjustment partner (5) so as to be rotatable about an eccentric axis (a), wherein the eccentric (8) is guided in the first adjustment partner (5) with a thread (5a, 8b), wherein the eccentric has a cylindrical threaded section (8b) with an external thread, which engages with a threaded bore (5a), which is provided with an internal thread, of the first adjustment partner (5), wherein an engagement section (8a) adjoins the threaded section (8b), which engagement section is formed eccentrically relative to the eccentric axis (a) and which engages with the second adjustment partner (7, 7'), wherein the engagement section (8a) has a rounded outer shape with a circular segment-shaped outer surface arranged about a center axis (b), and wherein the eccentric (8) has a tool receptacle (8e), in particular a hexagon socket or a hexalobular, which has an axis of symmetry (c), characterized in that the axis of symmetry (c) is arranged centrally between the eccentric axis (a) and the center axis (b).

2. The door hinge (1) according to claim 1, characterized in that the cylindrical threaded section (8b) has at least one flattened portion (8c).

3. The door hinge (1) according to claim 1 or 2, characterized in that the engagement section (8a) is formed as collar with beveled flanks (8d).

4. The door hinge (1) according to one of claims 1 to 3, characterized by a first stop, which limits a linear movement of the eccentric (8) in the direction of the eccentric axis (a) all the way to a first end position.

5. The door hinge (1) according to claim 4, characterized in that the engagement section (8a) of the eccentric (8) in the first end position is aligned in a first extreme position in the adjustment direction (6).

6. The door hinge (1) according to claim 4 or 5, characterized by a second stop, which limits a linear movement of the eccentric (8) in the direction of the eccentric axis (a), opposite to the first stop, all the way to a second end position.

7. The door hinge (1) according to claim 6, characterized in that the engagement section (8a) of the eccentric (8) in the second end position is aligned in the adjustment direction (6) in a second extreme position.

8. The door hinge (1) according to one of claims 1 to 7, characterized in that the first adjustment partner (5) and the second adjustment partner (7, 7') are linearly forcibly guided on one another in the adjustment direction (6).

9. The door hinge (1) according to claim 8, characterized in that the first adjustment partner (5) abuts flat with a first abutment surface (5b) against a second abutment surface (7b) of the second adjustment partner (7, 7').

10. The door hinge (1) according to claim 9, characterized in that the first abutment surface (5b) and the second abutment surface (7b) are aligned perpendicular to the eccentric axis (4).

11. The door hinge (1) according to claim 9 or 10, characterized in that a projection, which is aligned in the adjustment direction and which engages in a positive manner with a corresponding groove in the second abutment surface (7b), is formed on the first abutment surface (5b) and / or that a projection (7c), which is aligned in the adjustment direction and which engages in a positive manner with a corresponding groove (5c) in the first abutment surface (5b), is formed on the second abutment surface (7b).

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