EP3625417B1 - Length-adjustable control arm - Google Patents

Description

The invention relates to a control arm for the articulated connection of a flap holder to a flap, folding flap, door or the like, the control arm having at least a first and a second adjustable telescopic arm guided thereon to adjust its length, and the control arm at least one locking device for fixing the position of the two telescopic arms to one another

The invention also relates to a lifting device for a flap, folding flap, door or the like with a flap holder, a flap bearing that can be fastened to the flap, folding flap, door or the like and a control arm that is adjustable in length and connecting the flap holder and the flap bearing, the control arm at least has a locking device for fixing its set length.

The invention further relates to a method for adjusting the length of a control arm of a lifting device for a flap, folding flap, door or the like of a piece of furniture, the control arm being a pivotable connection between a flap holder attached to a furniture body and a flap holder attached to the flap, folding flap, door or the like attached flap bearing, wherein the control arm for adjusting its length has at least a first and a second adjustable telescopic arm guided thereon, and wherein the control arm has at least one locking device for fixing the position of the two telescopic arms to each other.

From the DE 20 2006 020 216 U1 an actuating arm for a furniture flap is known. The actuating arm connects a base body mounted on a piece of furniture to the furniture flap and is used to move the furniture flap. It has an inner and an outer tube part which are mounted so that they can be telescopically displaced with respect to one another. This enables the length of the actuating arm to be continuously adjusted so that it can be adapted to different cabinet sizes. After setting the correct length, the two pipe parts are fixed to each other by a locking device. For this purpose, there is a clamping element between the pipe parts arranged with a tab on which an eccentric projection of a pivotably mounted actuating element (clamping lever) acts. By actuating the tensioning lever, the tab is deformed towards the inner pipe part and thus the inner pipe part is expanded so that the pipe parts are prevented from shifting relative to one another. Disadvantageously, the pipe parts which are spread apart from one another, in particular in the case of heavy furniture flaps, can inadvertently move relative to one another, as a result of which a complete closing of the furniture flap is no longer possible. In order to avoid unintentional displacement of the pipe parts that are not fixed to one another during the adjustment process, an additional guide element with spring-loaded friction linings arranged on it is required. These form a frictional connection between the two pipe parts, which makes the movement difficult to move. With the guide element, an additional component is required in order to achieve the desired function of the actuating arm.

the EP 1 812 674 B1 describes a spring-loaded actuator for moving a flap of a piece of furniture. The actuator has a base body for attachment to a furniture body. It is connected to the furniture flap via an actuating arm. The actuating arm can according to the teaching from the DE 20 2006 020 216 U1 be made adjustable in length. A pivotably mounted latching part is assigned to the actuator, on which the actuating arm is fixed by a latching connection. This enables simple and quick assembly and disassembly of the actuating arm. Disadvantageously, the actuating arm has a complex latching arrangement for fixing it to the pivotably mounted latching part, as a result of which the manufacturing costs for the actuating arm increase significantly.

A control arm with the features of the introductory part of claim 1 is from DE 196 12 922 A1 known.

It is the object of the invention to provide a control arm for the articulated connection of a flap holder to a flap, folding flap, door or the like, the length of which can be adapted easily, quickly and secured against unintentional adjustment to a respective flap, folding flap, door or the like.

It is a further object of the invention to provide a lifting device with such a control arm.

It is also an object of the invention to provide a method for adjusting the length of such a control arm.

The object of the invention relating to the control arm is achieved with the features of claim 1, the control arm being assigned a locking connection which acts in the direction of its change in length between the telescopic arms and which has at least two or more locking positions arranged along the length change of the control arm and spaced apart by a locking distance . When the locking device is released, the control arm according to the invention automatically adjusts itself to its optimal length when the flap, folding flap, door or the like is closed. It engages in one of the locking positions. Due to the locking connection that acts, this length is retained when the flap, folding flap, door or the like is opened. For this purpose, the force required to overcome the latching connection is preferably set greater than the force transmitted to the control arm by the flap, folding flap, door or the like in the direction of the possible length adjustment. With the aid of the locking device, the position of the two telescopic arms with respect to one another can now be fixed when the flap, folding flap door or the like is open. Due to the open flap, folding flap, door or the like, the locking device is easily accessible and can be operated easily. The control arm according to the invention enables its length to be adjusted correctly after the flap, folding flap door or the like has been closed once. This can significantly reduce the time required to adjust the length. Especially when using two flap holders, for example on both opposite sides of the flap, folding flap, door or the like, their length can be adjusted simultaneously by closing the flap, folding flap, door or the like and fixed after opening the flap, folding flap, door or the like will. The assembly effort for building a piece of furniture with a flap holder with such a control arm is therefore very low.

A defined length adjustment of the control arm can be achieved in that successive latching positions are each arranged at the same latching distance from one another.

According to a particularly preferred embodiment of the invention, it can be provided that the latching distance is in an integer ratio to the spacing of possible mounting positions of the flap holder on a piece of furniture, preferably that the latching distance is in an integer ratio of 32mm, particularly preferably that the latching distance is 8mm. The correct length of the control arm is obtained when the flap, folding flap, door or the like is closed, since this can only be completely closed with a control arm of the correct length. When the flap, folding flap, door or the like is closed, the control arm is aligned along the arrangement of the possible mounting position of the flap holder. The flap holder is fixed to wall bores on the body of the piece of furniture that are evenly spaced from one another. These wall holes are also used, for example, to attach shelves. Their distance is standardized and is mostly 32 mm. By means of a latching distance, which is in an integer ratio to the distance between the possible mounting positions of the flap holder, the length of the control arm can, despite its only discontinuous adjustment options, exactly match the size of the piece of furniture, the flap, folding flap, door or the like or the mounting position of the flap holder can be set on the piece of furniture. This enables the flap, folding flap, door or the like to be fully closed.

The latching connection between the telescopic arms is easily established in that, according to the invention, latching receptacles of the latching device are arranged on at least one of the telescopic arms, into which a resiliently mounted latching element of the latching device engages.

A simple fixation of the length of the control arm is made possible by the fact that, according to the invention, the locking device is designed to block the latching element in a latching receptacle. The locking element previously engaged in the locking receptacle can then no longer be disengaged from the locking receptacle even with strong tensile forces acting on the control arm, whereby the length of the control arm is fixed and can no longer be adjusted by heavy flaps, folding flaps, doors or the like held therewith can.

A simple and inexpensive construction of the locking device is achieved according to the invention in that the locking device has a blocking element which, in a first operating position, engages with another of the locking receptacles and in a second operating position in which the locking element is not blocked by the locking device in the first locking receptacle is out of engagement with the locking receptacle. The blocking element engages in the same latching receptacles that are also used to form the latching connection.

According to a preferred embodiment of the invention, it can be provided that the blocking element is arranged at a distance from the latching element by the latching distance or by an integral multiple of the latching distance. When the latching connection is engaged, in which the latching element engages in one of the latching receptacles, the blocking element is thus precisely aligned with a further latching receptacle and can be brought into engagement with this to fix the length of the control arm.

It can advantageously be provided that the latching receptacles are arranged on one of the telescopic arms and that the blocking element produces a locking connection to the other telescopic arm in both operating positions. The blocking element is thus firmly connected to both telescopic arms in its first operating position. This prevents mutual displacement of the telescopic arms. In its second operating position, the blocking element is only connected to one of the telescopic arms, while the connection to the latching receptacles of the other telescopic arm is canceled. In this operating position of the blocking element, the telescopic arms can be moved to one another and the length of the control arm can thus be adjusted.

If it is provided that the second telescopic arm is guided as an inner telescopic arm in the first telescopic arm as the outer telescopic arm and that the latching receptacles are arranged on the second telescopic arm, the latching receptacles are not visible from the outside and are arranged protected from contamination. The locking connection is not accessible from the outside and can therefore not be accidentally released.

A space-saving arrangement of the locking connection and / or the locking device can be achieved in that a groove running in the direction of its longitudinal extension is formed in the second telescopic arm and that the locking connection and / or the locking device is at least partially arranged in the groove. The second telescopic arm is advantageous guided as an inner telescopic arm in the first telescopic arm as an outer telescopic arm. The groove is thus covered at least in sections by the first telescopic arm and is thus arranged to be protected from contamination.

A particularly preferred variant of the invention is such that a slot nut, on which the latching element and / or the blocking element is arranged, is guided in the groove. The sliding block can be arranged in the area of the groove covered by the outer telescopic arm. The locking element can then produce a locking connection between the sliding block and the locking receptacles on the second telescopic arm. In its first operating position, the blocking element can engage in a latching receptacle, as a result of which the sliding block is no longer connected to the second telescopic arm in an adjustable manner. When the blocking element is released, the sliding block can be displaced relative to the second telescopic arm, the locking element engaging in the successive locking receptacles and in each case producing a releasable locking connection with these. At the same time, the blocking element can be connected to the first, outer telescopic arm in both operating positions (blocked and released position), as a result of which the sliding block is firmly connected to the first telescopic arm. In the second, released operating position of the blocking element, the second telescopic arm can thus be adjusted relative to the first telescopic arm in accordance with the predetermined grid. In the first, closed operating position of the blocking element, the two telescopic arms are fixed to one another.

A protected arrangement of the latching receptacles can be achieved in that the latching receptacles are arranged within the groove, preferably on a groove base. The latching connection can thus be arranged completely within the groove.

It can advantageously be provided that the latching element is designed as a spring-preloaded latching pin which can be moved linearly in a pin guide on the T-nut is guided. The locking pin is advantageously aligned transversely to the direction of the length adjustment of the control arm. A latching connection between the latching pin and a latching receptacle with a sufficiently high holding force can thus be provided so that it does not adjust automatically when the flap, folding flap, door or the like is opened. This enables the length of the control arm to be easily adjusted.

A small number of parts can be achieved in that the latching element is designed as a resilient latching shoulder with a latching head which is connected, preferably integrally, to the slot nut.

A simple yet effective locking device can be achieved in that the blocking element of the locking device is designed as a locking screw which is screwed into the slot nut and at the end engages one of the latching receptacles on the second telescopic arm and in a second operating Screw-in depth is out of engagement with the locking receptacle and / or that the locking screw is fixed in both operating screw-in depths on the first telescopic arm. The length adjustment of the control arm can thus be blocked by screwing in the locking screw and permitted by unscrewing the locking screw.

It can particularly preferably be provided that the locking screw, preferably a screw head of the locking screw, is arranged in a locking bore on the first telescopic arm and is accessible from the outside at both operating screw-in depths. The sliding block can thus be covered by the outer telescopic arm and arranged in the groove on the inner telescopic arm. The locking screw is accessed via the locking hole. The locking screw creates a connection to the outer telescopic arm through its engagement in the locking bore at both operating screw-in depths. As a result, the locking screw is arranged in alignment with the locking bore in all length settings of the control arm and is accordingly accessible. To dismantle the control arm, the locking screw can be unscrewed from the sliding block and removed through the locking hole. The telescopic arms can now be pulled apart and separated from each other.

A possible variant of the invention can be characterized in that the sliding block has a screw receptacle designed as a through hole into which the locking screw is screwed and that the screw receptacle is widened to a screw head receptacle on the side of the screw head of the locking screw. The locking screw can be screwed into the through-hole to such an extent that it protrudes from this at the end and engages in a locking receptacle arranged in alignment therewith. Accordingly, the locking screw can be unscrewed from the screw receptacle to such an extent that it no longer protrudes at the end. The connection to the latching receptacle is thus canceled and the sliding block can be displaced with respect to the telescopic arm carrying the latching receptacles, overcoming the latching connection. The screw head holder is designed to receive part of its screw head when the locking screw is screwed in. The outer section of the screw head remains in the locking bore of the first telescopic arm and establishes a connection to it that acts in the direction of adjustment of the telescopic arms. The screw head receptacle advantageously enables the screw head to be flush with the outer surface of the first telescopic arm when the locking screw is screwed in. To assemble the control arm, the telescopic arms can be pushed together with the sliding block inserted in the groove and an effective locking connection until the screw receptacle inserted in the sliding block for receiving the locking screw is aligned with the locking bore. The locking screw can then be screwed through the locking bore into the screw receptacle, whereby the connection between the sliding block and the first telescopic arm is established.

According to a possible variant of the invention, it can be provided that the locking device has a locking arrangement which can be opened and closed and which, in its closed position, braces the sliding block with respect to one or both telescopic arms. The blocking arrangement therefore does not intervene in the latching receptacles. This makes it possible, for example, for the locking connection to be formed between the slot nut and one or both slot side walls, while the blocking arrangement is effective between the slot base and the first telescopic arm.

A simple and easy-to-assemble connection between the control arm and the flap holder can be achieved in that the first telescopic arm has a fastening area at its end facing away from the second telescopic arm, with which it can be plugged onto a retaining attachment of a pivotably mounted lever of the flap holder. As a result, a defined attachment of the control arm to the flap holder is achieved as a prerequisite for the correct adjustment of the length of the control arm.

The object relating to the lifting device is achieved according to claim 17 by a control arm according to the invention in accordance with the preceding description. The control arm can be easily and quickly adapted to the size of the piece of furniture and the hinged flap, folding flap, door or the like. This enables the lifting device to be installed quickly and easily.

A connection between the control arm and the flap holder that is easy to assemble and at the same time highly resilient can be achieved in that the flap holder has a pivotably mounted lever with a holding attachment onto which a first telescopic arm of the control arm is attached so that a fixing screw is screwed into the holding attachment , and that the completely screwed-in fixing screw is out of engagement and the partially screwed-in fixing screw is in engagement with a fixing hole on the first telescopic arm. To attach the control arm to the retaining attachment, the fixing screw is first screwed in completely. Then the control arm is pushed onto the holding attachment until the fixing hole is aligned with the fixing screw. The holding attachment preferably has a stop against which the control arm rests when it is correctly positioned. A tool is then guided through the fixing hole to the fixing screw and the screw is unscrewed so far that it is in engagement with the fixing hole. The control arm is firmly connected to the holding attachment. The defined attachment of the control arm to the flap holder thus obtained enables the length of the control arm to be adjusted correctly.

According to a particularly preferred equipment variant of the invention, it can be provided that the head of the fixing screw has a stop and then a fixing section and that the fixing screw, which is partially screwed into the holding attachment, rests with its stop on the telescopic arm and with the fixing section engages the fixing hole stands. The correct position of the fixing screw for fixing the control arm on the holding lug is given by the stop. The fixing section is advantageously designed to protrude above the stop in such a way that it engages in the fixing hole when the stop is in contact with the telescopic arm, but does not protrude from it opposite the stop. In this way, when the control arm is fully assembled, the fixing screw is advantageously flush with the outer surface of the control arm.

If it is provided that the control arm is connected to the flap bearing via a pivot bearing and that the flap bearing enables a stepless linear adjustment of the pivot bearing with respect to a flap, folding flap, door or the like attached to it, then deviations in the adjustable length of the adjustable length of the Control arm to be balanced by an optimal length. The linear adjustment path of the pivot bearing advantageously corresponds at least to the latching distance between adjacent latching steps of the control arm.

The object of the invention relating to the method is achieved with the features of claim 21.

In order to be able to compensate for small deviations of the set length of the control arm from the optimal length, it can be provided that a coupling point of the control arm on the flap bearing is adjusted to fine-tune the closed position of the flap, folding flap, door or the like.

Figur 1

ein Möbelstück mit einer angelenkten Faltklappe und einer Hebevorrichtung mit einem Steuerarm,

Figur 2

den Steuerarm in einer perspektivischen Seitenansicht,

Figur 3

einen Abschnitt des Steuerarms in einer Draufsicht,

Figur 4

einen Abschnitt des Steuerarms in einer Explosionsdarstellung,

Figur 5

den Steuerarm in einer teilweise geschnittenen Seitendarstellung,

Figur 6

einen Ausschnitt des Steuerarms in einer seitlichen Schnittdarstellung,

Figur 7

in einer seitlichen Schnittdarstellung das in Figur 1 gezeigte Möbelstück mit der angelenkten Faltklappe, der Hebevorrichtung und dem Steuerarm und

Figur 8

einen Ausschnitt des Steuerarms in einer seitlichen Schnittdarstellung.

The invention is explained in more detail below using an exemplary embodiment shown in the drawings. Show it:

Figure 1

a piece of furniture with a hinged folding flap and a lifting device with a control arm,

Figure 2

the control arm in a perspective side view,

Figure 3

a section of the control arm in a plan view,

Figure 4

a portion of the control arm in an exploded view,

Figure 5

the control arm in a partially cut side view,

Figure 6

a section of the control arm in a lateral sectional view,

Figure 7

in a lateral sectional view the in Figure 1 Shown piece of furniture with the hinged folding flap, the lifting device and the control arm and

Figure 8

a section of the control arm in a lateral sectional view.

Figure 1 shows a piece of furniture 10 with a hinged folding flap and a lifting device with a control arm 40. The piece of furniture 10 is in the present case designed as a hanging cabinet. The furniture body has a side wall 11, a rear wall 12, a cabinet lid 13 and a cabinet base 14. A holder 20 for fastening the piece of furniture, for example on a wall, is arranged on the side wall 11. The interior of the piece of furniture 10 is divided by a shelf 15. For this purpose, front and rear wall bores 16.1, 16.2 are made in the side wall 11 and in a second side wall (not shown) arranged opposite the side wall 11. In each case a front and a rear wall bore 16.1, 16.2 holding elements, not shown, are introduced on which the shelf board 15 rests. The front and rear wall bores 16.1, 16.2 are each spaced apart from one another by a fixed predetermined bore spacing 17. The hole spacing 17 is standardized and in the present case is 32 mm.

The piece of furniture 10 can be closed by the folding flap shown here partially open. The folding flap has a first and a second partial flap 18, 19. The two partial flaps 18, 19 are connected to one another by a central hinge 22. The first partial flap 18 is attached in an articulated manner to the furniture body and there to the cabinet lid 13 by means of a furniture hinge 21.

The lifting device supports the opening and closing process of the folding flap. In the present case, it is designed to hold the folding flap in its position even in a partially open state. For this purpose, it has a flap holder 30 which is fastened to the side wall 11 of the piece of furniture 10. The flap holder 30 is fixed to at least one of the front wall bores 16.1. The mounting position of the flap holder 30 can be selected depending on the size of the piece of furniture 10 and the folding flap. The possible mounting positions are predetermined by the position of the front wall bores 16.1. An in Figure 7 The housing 32 of the flap holder 30 shown is shown in FIG Figure 1 covered by a cover 31. A holding attachment 33.1 extends out of the housing 32. How closer out Figure 7 it can be seen, the holding lug 33.1 is part of a pivotable on the Flap holder 30 mounted lever 33. The control arm 40 is connected at its one end to the holding attachment 33.1.

The control arm 40 has a first and a second telescopic arm 41, 42. The first telescopic arm 41 forms an outer telescopic arm in which the second telescopic arm 42 is mounted as an inner telescopic arm so as to be linearly adjustable. By shifting the second telescopic arm 42 relative to the first telescopic arm 41, the length of the control arm 40 can be changed. At its end facing away from the first telescopic arm 41, the second telescopic arm 42 has a holding section 43. The holding portion 43 is curved in shape. At the end, the holding section 43 is pivotably connected to a flap bearing 50 via a pivot bearing 51. The flap bearing 50 is attached to the inner surface of the second partial flap 19 of the folding flap.

To open and close the piece of furniture 10, the folding flap is pivoted about the furniture hinge 21. The second partial flap 19 is guided through the central hinge 22 and the lifting device. The lifting device transmits a force acting in the opening direction from the flap holder 30 via the control arm 40 and the flap bearing 50 to the folding flap.

When opening the folding flap, the second partial flap 19 is also around the in Figure 7 shown pivot axis 33.4 of the flap holder 30 is pivoted. This leads to a folding movement of the two partial flaps 18, 19 around the central hinge 22 until they are aligned at an acute angle to one another and are held in the upper region of the piece of furniture 10, supported by the lifting device.

In the closed state, the two partial flaps 18, 19 rest in one plane on the furniture body. The control arm 40 is then arranged in the interior of the piece of furniture 10 and runs to the side of the folding flap. Due to the curved shape of the holding section 43, the control arm 40 is guided to the pivot bearing 51 on the flap bearing 50 protruding into the furniture body. The closed state defines the required length of the control arm 40. If the control arm 40 is too long or too short, the folding flap cannot be closed completely against the furniture body. When using Flap levers, which cannot be adjusted in length, as a connection between the flap holder 30 and the flap bearing 50, have to be provided in each case with flap levers of a suitable length for pieces of furniture of different sizes. This is logistically complex and leads to malfunctions, for example if the wrong flap lever is used. By using the control arm 40, which is adjustable in length, it can be adapted to the respective installation conditions.

Figure 2 shows the control arm 40 in a perspective side view. The second telescopic arm 42 has a rectangular cross section. The first telescopic arm 41 is tubular. It has a rectangular internal cross-section. A receptacle for the second telescopic arm 42 is thus formed along its longitudinal extension. In the present case, the second telescopic arm 42 is partially pushed into the first telescopic arm 41. By pushing the second telescopic arm 42 into the first telescopic arm 41 or pulling the second telescopic arm 42 out of the first telescopic arm 41, the length of the control arm 40 can be adjusted. The two telescopic arms 41, 42 can be fixed to one another with the aid of a locking screw 65. A groove 42.1 is incorporated into the second telescopic arm 42. The groove 42.1 runs along the longitudinal extension of the control arm 40. It is open towards the locking screw 65. At the end, the second telescopic arm 42 forms the curved holding section 43. At the end of the holding section 43, this is pierced by an axis bore 43.1. The axis bore 43.1 is aligned transversely to the longitudinal extension of the control arm 40. It serves as part of the pivot bearing 51 of the articulated connection of the control arm 40 with the in Figure 1 flap bearing 50 shown.

Figure 3 shows a portion of the control arm 40 in a plan view. The second telescopic arm 42 is partially pushed into the first telescopic arm 41. The view enables a view into the groove 42.1 of the second telescopic arm 42. The groove 42.1 is laterally limited by groove side walls 42.3 arranged at a distance from one another. Opposite the opening of the groove 42.1, it is closed off by a groove bottom 42.2. In the groove bottom 42.2 42 locking receptacles 42.4 are formed along the longitudinal extension of the second telescopic arm. The latching receptacles 42.4 are designed as recesses in the groove bottom 42.2. In the present case, they have one on the edge with respect to the groove bottom 42.2 inclined and flat on its bottom contour. However, it is also conceivable to provide other contours of the latching receptacles 42.4, for example in the form of a spherical segment. The latching receptacles 42.4 are each spaced apart from one another by a constant latching distance 42.5. Each locking receptacle 42.4 is assigned a length specification of the control arm 40 in the form of a scale 42.6. The locking screw 65 is guided into the interior of the first telescopic arm 41 through a locking bore 41.1. A screw head 65.2 with a tool holder 65.3 of the locking screw 65 can be seen in the top view. The screw head 65.2 is arranged within the locking bore 41.1.

The holding section 43 is tapered in its cross section compared to the section of the second telescopic arm 42 that receives the groove 42.1.

Figure 4 shows a portion of the control arm 40 in an exploded view. A slot nut 60 is assigned to the groove 42.1. The sliding block 60 is dimensioned so that it can be let into the groove 42.1 and guided therein. A base part 60.1 of the sliding block 60 is rounded at the end. The end of the groove 42.1 is correspondingly rounded. The sliding block 60 can thus be moved completely to the end of the groove 42.1. The slot nut 60 is pierced by a pin guide 61 aligned transversely to the longitudinal extension of the groove 42.1. The pin guide 61 is open as a through hole towards the groove 42.1 and opposite. How in particular Figure 5 It can be seen that the pin guide 61 is widened to the groove 42.1 pointing to a spring receptacle 61.1. A spring 63 is assigned to the spring receptacle 61.1. The spring 63 is designed as a compression spring. It preloads a locking pin 62. The locking pin 62 has a cylindrical shaft 62.1. A pin head 62.2 is formed on the end of the shaft 62.1. The pin head 62.2 is oriented towards the groove 42.1, while the shaft 62.1 points towards the tongue 63 and the pin guide 61. The pin head 62.2 is pointing towards the groove 42.1 according to the contour of the in Figure 3 shown locking receptacles 42.4 formed. The cross section of the shaft 62.1 of the locking pin 62 is adapted to the pin guide 61 of the slot nut 60. The shaft 62.1 can thus be inserted into the pin guide 61 and guided therein.

The sliding block 60 is also broken through by a screw receptacle 64. The screw receptacle 64 is aligned in accordance with the pin guide 61. It thus points in the direction of the groove 42.1. Facing away from the groove 42.1, the screw receptacle 64 is widened to form a screw head receptacle 64.1. The pin guide 61 and the screw receptacle 64 are corresponding to the locking distance 42.5 (see Figure 3 ) spaced apart from one another between the locking receptacles 42.4.

The locking screw 65 is assigned to the locking bore 41.1. The locking screw 65 has a threaded section 65.1 on which the screw head 65.2 with the tool holder 65.3 is integrally formed. The threaded section 65.1 is adapted to the screw receptacle 64 of the sliding block 60. The locking screw 65 can thus be screwed through the locking bore 41.1 into the screw receptacle 64 of the sliding block 60 if it is guided in the groove of the locking bore 41.1 in such a way that the locking bore 41.1 is aligned with the screw receptacle 64.

Figure 5 shows the control arm 60 in a partially sectioned side view. The sectional illustration relates to the transition area from the first to the second telescopic arm 41, 42. In the illustration shown, the second telescopic arm 42 is inserted as far as possible into the first telescopic arm 41. The control arm 40 thus has its smallest possible length. The sliding block 60 is arranged in the groove 42.1 of the second telescopic arm 42. The sliding block 60 is aligned with respect to the first telescopic arm 41 in such a way that the screw receptacle 64 is aligned with the locking bore 41.1. The locking screw 65 is screwed into the screw receptacle 64. The screw head 65.2 of the locking screw 65 is partially received in the screw head receptacle 64.1 of the sliding block 60. The outer area of the screw head 65.2 protrudes into the locking bore 41.1 of the outer telescopic arm 41. As a result, the sliding block 60 is held on the first telescopic arm 41. The spring 63 is inserted into the spring receptacle 61.1. The locking pin 62 is guided with its shaft 62.1 by the spring 63 to the pin guide 61 and is held radially therein. The spring 63 is clamped between the pin head 62.2 and the transition section between the spring receptacle 61.1 and the pin guide 61 which is tapered for this purpose. It pushes the pin head 62.2 of the locking pin 62 in the direction of the groove bottom 42.2 of the groove 42.1. Opposite to the groove bottom 42.2, the groove 62.1 is in the area of the sliding block 60 closed by the first telescopic arm 41. The spring force of the spring 63 transmitted to the sliding block 60 is thus absorbed by the first telescopic arm 41.

In the position shown of the two telescopic arms 41, 42 relative to one another, the locking pin 62 is arranged opposite a locking receptacle 42.4 in the groove bottom 42.2 of the groove 42.1. As a result, the pin head 42.2 is pressed into the latching receptacle 42.4 by the acting spring force. The pin head 42.2 and the latching receptacle 42.4 thus form a latching connection due to the acting spring force. This locking connection fixes the sliding block 60 with respect to the second telescopic arm 42. At the same time, the sliding block 60 is connected to the first telescopic arm 41 by the locking screw 65. A latching connection that acts between the two telescopic arms 41, 42 is thus established. The spring force acting on the locking pin 62 is overcome by a sufficiently large force acting along the longitudinal extension of the control arm 40 between the two telescopic arms 41, 42. The telescopic arms 41, 42 can thus be displaced linearly with respect to one another and the length of the control arm 40 can thereby be adjusted. When the next locking receptacle 42.4 is reached, the pin head 62.2 of the locking pin 62 is pressed back into it by the spring force. The change in length of the control arm 40 can thus be carried out in a grid fixedly predetermined by the detent spacing 42.5 between the detent receptacles 42.4. If the control arm 40 has the desired length, the sliding block 60 can be blocked with respect to the second control arm 42 by the locking screw 65. Since the same distance as the latching distance 42.5 between the latching receptacles 42.4 is selected between the pin guide 61 and the screw receptacle 64, the locking screw 65 is arranged exactly opposite a further latching receptacle 42.4 when the latching pin 62 is engaged in a latching receptacle 42.4. The locking screw 65 can then be screwed so far into the screw receptacle 64 of the sliding block 60 that the end of its shaft 62.1 protrudes from the screw receptacle 64 and into the latching receptacle 42.4. In this position of the locking screw 65, the sliding block 60 is fixed in relation to the second telescopic arm 42. The screw head 65.2 of the locking screw 65 is designed such that it protrudes at least partially into the locking bore 41.1 of the first telescopic arm 41 even in the screwed-in position of the locking screw 65. This leaves the T-nut 60 is also set with respect to the first telescopic arm 41. A linear adjustment of the two telescopic arms 41, 42 with respect to one another is thus blocked by the screwed-in locking screw 65.

Figure 6 shows a detail of the control arm 40 in a sectional side view. The design of the telescopic arms 41, 42 and the locking screw 65 and their function corresponds to the description of the Figures 1 to 5 , to which reference is hereby made. The sliding block 60 also has a screw receptacle 64 into which the locking screw 65 is screwed.

The function of the locking pin 62 is taken over by a locking projection 66 with a locking head 66.1. The latching projection 66 is designed as a tab molded onto the base part 60.1 of the sliding block 60. It is oriented in the direction of the longitudinal extension of the actuating arm 40. The latching projection 66 thus runs at a distance from the groove bottom 42.2. The latching head 66.1 is integrally formed on the free end of the latching projection 66. It is aligned pointing in the direction of the groove bottom 42.2. The shape of the latching head 66.1 is adapted to the contour of the latching receptacles 42.4. The latching projection 66 is designed to be resilient. The latching head 66.1 is pressed against the groove bottom 42.2 by the latching shoulder 66. If the latching head 66.1 is arranged opposite a latching receptacle 42.4, it is pressed into the latching receptacle 42.4 by the resilient effect of the latching projection 66. As a result, a locking connection between the sliding block 60 and the locking receptacle 42.4 and thus the second telescopic arm 42 is established. The locking screw 65, which is partially screwed in and does not engage in one of the locking receptacles 42.4, makes the sliding block 60, as shown in FIG Figure 5 is connected to the first telescopic arm 41. A latching connection acting between the two telescopic arms 41, 42 is thus formed. The latching head 66.1 is arranged at a distance from the locking screw 65 between the latching receptacles 42.4 in accordance with the latching distance 42.5. When the latch head 66.1 is locked in a latching receptacle 42.4, the locking screw 65 is thus arranged opposite a latching receptacle 42.4. By screwing in the locking screw 65, it can be brought into engagement with the locking receptacles 42.4. The sliding block 60 is thus, as already closed Figure 5 is firmly connected to the second telescopic arm 42. A linear displacement of the two telescopic arms 41, 42 to one another is like this not possible anymore. The length of the control arm 40 is thus fixed. It is also conceivable for the locking screw 65 to be guided through the sliding block 60 in an aligned manner with the locking head 66.1. A locking screw 65 arranged in this way can then be screwed in and rest against the locking projection on the side facing away from the locking receptacle 42.4 and block it. This prevents the locking connection from being released and the telescopic arms 41, 42 are mutually fixed. By unscrewing a locking screw 65 arranged in this way, the latching projection 66 is released again and the latching head 66.1 can slide out of the latching receptacle 42.4 when a corresponding force is applied.

Preferably, when the latching connection is formed via a latching shoulder 66, the sliding block 60 and the latching shoulder 66 formed thereon are made from a resilient material, in particular from a metal or a plastic.

Figure 7 shows in a sectional side view the in Figure 1 The piece of furniture 10 shown with the hinged folding flap, the lifting device and the control arm 40. The course of the cut is laid through the control arm 40.

The control arm 40 is as described for the Figures 1 to 6 formed, wherein a slot nut 60 with a locking pin 62, as in the Figures 4 and 5 shown is used.

At its end facing the piece of furniture 10, the first telescopic arm 41 has a fastening area 41.3 with which it is slipped onto the holding attachment 33.1 of the lever 33 of the flap holder 30. The holding attachment 33.1 preferably has a stop, not shown, on which the fully pushed-on first telescopic arm 41 rests. Such a stop ensures the correct positioning of the control arm 40 with respect to the holding attachment 33.1. In this positioning, a threaded hole made in the holding attachment 33.1 is arranged in alignment with a fixing hole 41.4 on the first telescopic arm 41. Pointing towards the fixing bore 41.4, the threaded bore 33.2 is widened to form a head receptacle 33.3. A fixing screw 35 is screwed with a threaded section 35.1 into the threaded bore 33.2 in such a way that its screw head is at least partially arranged in the head receptacle 33.3 The screw head of the fixing screw 35 has a stop ring 35.2 which, opposite to the threaded section 35.1, is transferred into a fixing section 35.3. The fixing section 35.3 has a reduced diameter compared to the stop ring 35.2. A tool engagement 35.4 is formed in the fixing section 35.3 and the area of the stop ring 35.2. The diameter of the fixing section 35.3 is slightly smaller than the diameter of the fixing hole 41.4 on the telescopic arm 41, while the diameter of the stop ring 35.2 is larger than the diameter of the fixing hole 41.4. To attach the control arm to the holding attachment 33.1, the fixing screw 35 is first screwed into the threaded bore 33.2 until the head of the fixing screw 35 is completely received by the head receptacle 33.3 molded into the holding attachment 33.1. The head of the fixing screw no longer protrudes beyond the holding shoulder 33.1 and the first telescopic arm 41 can be pushed onto the holding shoulder 33.1, preferably up to a stop. In this mounting position, the fixing bore 41.4 is aligned with the fixing section 35.3 of the fixing screw 35. How closer to Figure 8 As shown, a tool 70 can now be guided through the fixing hole 41.4 to the tool engagement 35.4 of the fixing screw 35 and this can be partially screwed out of the threaded hole 33.2 until the stop ring 35.2 rests circumferentially around the fixing hole 41.4 on the first telescopic arm 41 and the fixing section 35.3 of the fixing screw 35 is in engagement with the locking bore 41.1. The control arm 40 is thus fixed on the holding attachment 33.1 of the lever 33 and can no longer be pulled off from it.

Between the holding attachment 33.1 and the end of the second control arm 42, an adjustment space 41.2 is formed in the first control arm 41, which is enlarged or reduced in size by moving the telescopic arms 41, 42 relative to one another. The positioning space 41.2 is designed in such a way that when the second telescopic arm 42 is completely pushed in, it does not strike the holding attachment 33.1.

The lever 33 is pivotably mounted on the pivot axis 33.4 of the flap holder 30 via a fastening section 33.5. A coupling piece 34 is articulated to the lever 33, via which the force of one or more springs (not shown) provided in the flap holder 30 on the lever 33 and thus the control arm 40 is transmitted. As already described, this spring force supports the opening and closing movement of the folding flap and keeps it in partially open positions.

Opposite to the flap holder 30, the control arm 40 is connected to the flap bearing 50 arranged on the folding flap. The flap bearing 50 has an assembly support 53 which is screwed to the inside of the second partial flap 19 by means of assembly screws 54. A bearing part 52 is connected to the assembly support 53 in a linearly adjustable manner. The adjustment direction runs along the plane of the second partial flap 19 and the projection of the control arm 40 onto the second partial flap 19. With the aid of an adjusting screw, the correct position of the bearing part 52 and the pivot bearing 51 connected to it can be set and blocked.

When assembling the lifting device, the length of the control arm 40 is first adjusted to the size of the present piece of furniture 10 and the hinged folding flap. The length of the in Figure 3 shown scaling 42.6 can be read off. The length adjustment takes place in accordance with the latching specifications through the latching connection between the two telescopic arms 41, 42. The latching distance 42.5 between the latching receptacles 42.4 is in an integer ratio to the bore spacing 17 between the front wall bores 16.1. The hole spacing 17 of the wall holes 16.1, 16.2 is largely standardized and is usually 32 mm. The latching distance 42.5 of the latching connection of the control arm 40 is set at 8 mm in the present case. When the piece of furniture 10 is closed, the telescopic arms 41, 42 are aligned in accordance with the row of the front wall bores 16.1. Due to the integer ratio in which the latching distance 42.5 between the latching receptacles 42.4 is to the bore spacing 17 of the wall bores 16.1, the length of the control arm 40 can be set to the required length despite the rasterized, discontinuous length adjustment. As described above, when the piece of furniture 10 is closed, the required length is given by the mounting position of the flap holder 30 and the flap bearing 50. When the length of the control arm 40 is set correctly, the two telescopic arms 41, 42 are fixed to one another by the locking screw 65. Small deviations in the length of the control arm 40 from the exactly required length can be compensated for by a corresponding linear displacement of the position of the pivot bearing 51. This is done through a corresponding displacement of the bearing part 52 relative to the mounting bracket 53. The correct length of the control arm 40 and the position of the pivot bearing 51 is achieved when the folding flap rests completely on the furniture body when the piece of furniture 10 is closed and the two partial flaps 18, 19 are aligned with one another in one plane are. The adjustment range of the flap bearing 50 advantageously corresponds to at least the length of a latching distance 42.5. As a result, any deviation of the length of the control arm 40 from the required length, which is smaller than a latching distance 42.5, can be compensated for by appropriate positioning of the pivot bearing 51. Larger deviations can be compensated for by adjusting the length of the control arm.

The length of the control arm 40 can be easily adjusted in such a way that the lifting device is first mounted on the piece of furniture 10 on which the folding flap was previously attached and aligned. Then, with the linear adjustment of the flap bearing 50 blocked and the locking screw 65 of the control arm 40 loosened, the folding flap is closed. The closed state of the piece of furniture 10 defines the exactly required length of the control arm 40. When the folding flap is closed, the telescopic arms 41, 42 are adjusted in such a way that the control arm 40 assumes the correct length within the locking distance 42.5 The holding force of the locking connection between the two telescopic arms 41, 42 is selected such that the length of the control arm 40 is not adjusted when the folding flap is subsequently opened. The length of the control arm 40 can now be easily fixed with the folding flap open and the locking screw 65 accessible. The fine adjustment of the closed position of the folding flap is then carried out by setting the flap bearing 50 accordingly.

Figure 8 shows a detail of the control arm 40 in a sectional side view. As already described, by engaging a suitable tool, the fixing screw 35 can be unscrewed so far that its fixing section 35.3 is guided into the fixing bore 41.4, whereby the first telescopic arm 41 is fixed with respect to the holding attachment 33.1.

Claims (22)

1. Control arm (40) for the articulated connection of a flap holder (30) to a flap, folding flap, door or the like, the control arm (40) having at least a first telescopic arm (41) and a second telescopic arm (42) guided adjustably thereon for adjusting its length, and the control arm (40) having at least one fixing device for fixing the position of the two telescopic arms relative to one another
   wherein the control arm (40) is associated with a detent connection acting in the direction of its length change between the telescopic arms (41, 42), which detent connection has at least two or more detent positions arranged along the length change of the control arm (40) and spaced apart by a detent distance (42.5), wherein on at least one of the telescopic arms (41, 42), latching receptacles (42.4) of the latching connection are arranged, in which a resiliently mounted latching element of the latching connection engages, wherein
   in a first operating position, the locking device is designed to lock the latching element in a first of the latching receptacles (42.4),
   characterized in that
   the locking device has a blocking element which, in the first operating position, is in engagement with a further one of the latching receptacles (42.4) and, in a second operating position in which the latching element is not blocked by the locking device in the first latching receptacle, is out of engagement with the further latching receptacle (42.4).
2. Control arm (40) according to claim 1,
   characterized in
   in that successive latching positions are arranged at the same latching distance (42.5) from one another in each case.
3. Control arm (40) according to claim 2,
   characterized in
   in that the detent spacing (42.5) is in an integral ratio to the spacing of possible mounting positions of the flap holder (30) on a piece of furniture, preferably in that the detent spacing (42.5) is in an integral ratio to 32mm, particularly preferably in that the detent spacing (42.5) is 8mm.
4. Control arm (40) according to claim 1,
   characterized in
   in that the blocking element is arranged at a distance from the detent element by the detent distance (42.5) or by an integral multiple of the detent distance (42.5).
5. Control arm (40) according to claim 1 to 4,
   characterized in
   in that the latching receptacles (42.4) are arranged on one of the telescopic arms (41, 42), and in that the blocking element establishes a locking connection to the other telescopic arm (41, 42) in both operating positions.
6. Control arm (40) according to one of claims 1 or 5,
   characterized in
   in that the second telescopic arm (42) is guided as an inner telescopic arm in the first telescopic arm (41) as an outer telescopic arm, and in that the latching receptacles (42.4) are arranged on the second telescopic arm (42).
7. Control arm (40) according to one of the claims 1 to 6,
   characterized in
   in that a groove (42.1) running in the direction of its longitudinal extent is formed in the second telescopic arm (42), and in that the latching connection and/or the locking device is arranged at least partially in the groove.
8. Control arm (40) according to claim 7,
   characterized in
   in that a sliding block (60) is guided in the groove (42.1), on which the latching element and/or the blocking element is arranged.
9. Control arm (40) according to claim 7 or 8,
   characterized in
   in that the latching receptacles (42.4) are arranged within the groove (42.1), preferably on a groove bottom (42.2).
10. Control arm (40) according to claim 8 or claim 9, if dependent on claim 8, characterized in
    in that the latching element is designed as a spring-biased latching pin (62), which is guided in a pin guide (61) in a linearly movable manner on the groove block (60).
11. Control arm (40) according to claim 8 or claim 9, if dependent on claim 8,
    characterized in
    in that the latching element is designed as a spring-elastic latching attachment (66) with a latching head (66.1) which is connected, preferably integrally connected, to the sliding block (60).
12. Control arm (40) according to one of claims 8 or 10 to 11, or according to claim 9, if dependent on claim 8,
    characterized in
    in that the blocking element of the locking device is designed as a locking screw (65) which is screwed into the sliding block (60) and is in engagement at the end with one of the latching receptacles (42.4) on the second telescopic arm (42.4) at a first operating screw-in depth and is out of engagement with the latching receptacle (42.4) at a second operating screw-in depth and/or in that the locking screw (65) is fixed to the first telescopic arm (42) at both operating screw-in depths.
13. control arm (40) according to claim 12,
    characterized in
    that the locking screw (65), preferably a screw head (65.2) of the locking screw (65), is arranged in a locking bore (41.1) on the first telescopic arm (41) and accessible from the outside at both operating screw-in depths.
14. Control arm (40) according to claim 12 or 13,
    characterized in
    in that the sliding block (60) has a screw receptacle (64) which is designed as a through-bore and into which the locking screw (65) is screwed, and in that the screw receptacle (64) is widened on the side of the screw head (65.2) of the locking screw (65) to form a screw head receptacle (64.1).
15. Control arm (40) according to any one of claims 8 or 10 - 14, or claim 9 if dependent on claim 8,
    characterized in
    that the locking device comprises a locking arrangement to be opened and closed, which in its closed position braces the sliding block (60) relative to one or both telescopic arms (41, 42).
16. Control arm (40) according to any one of claims 1 to 15,
    characterized in
    in that the first telescopic arm (41) has, at its end facing away from the second telescopic arm (42), a fastening region (41.3) with which it can be plugged onto a retaining lug (33.1) of a pivotably mounted lever (33) of the flap holder (30).
17. Lifting device for a flap, folding flap, door or the like, having a flap holder (30), a flap bearing (50) which can be fastened to the flap, folding flap, door or the like, and a control arm (40) which connects the flap holder (30) and the flap bearing (50) and can be adjusted in its length, the control arm (40) having at least one fixing device for fixing its set length
    characterized by a control arm (40) according to any one of claims 1 to 16.
18. Lifting device according to claim 17,
    characterized in
    in that the flap holder (30) has a pivotably mounted lever (33) with a retaining lug (33.1) onto which a first telescopic arm (41) of the control arm (40) is fitted, in that a fixing screw (33.1) is inserted into the retaining lug (33. 1), and in that the fully screwed-in fixing screw (35) is disengaged and the partially screwed-in fixing screw (35) is engaged with a fixing bore (41.4) on the first telescopic arm (41).
19. Lifting device according to claim 18,
    characterized in
    in that the head of the fixing screw (35) has a stop (35.2) and, adjoining the latter, a fixing section (35.3), and in that the fixing screw (35), which is partially screwed into the retaining lug (33.1), bears with its stop (35.2) against the telescopic arm (41) and is in engagement with the fixing bore (41.4) by means of the fixing section (35.3).
20. Lifting device according to any one of claims 17 to 19,
    characterized in
    that the control arm (40) is connected to the flap bearing (50) via a pivot bearing (51), and that the flap bearing (50) enables a stepless linear adjustment of the pivot bearing (51) relative to a flap, folding flap, door or the like attached thereto.
21. method of adjusting the length of a control arm (40) of a lifting device for a flap, folding flap, door or the like of a piece of furniture (10) according to claim 1, wherein the control arm (40) provides a pivotable connection between a flap holder (30) attached to a furniture carcass and a flap bearing (50) attached to the flap, folding flap, door or the like, the control arm (40) 21. between the telescopic arms (41, 42) the latching connection is effective for the latched adjustment of the length of the control arm (40) in accordance with the predetermined, successive latching positions, that the flap, folding flap, door or the like is closed when the locking device is open, the length of the control arm (40) being adjusted to the required length and the latching connection latching in one of the possible latching positions in that the flap, folding flap, door or the like is opened, the length of the control arm (40) being maintained by the acting latching connection, and in that the position of the telescopic arms (41, 42) relative to one another is fixed by the fixing device when the flap, folding flap, door or the like is open.
22. Method according to claim 21,
    characterized in that
    that for fine tuning of the closed position of the flap, folding flap, door or the like, a coupling point of the control arm (40) to the flap bearing (50) is adjusted.

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