DE202021004262U1 - Folding device for a folding door and furniture with a folding door - Google Patents

Abstract

Folding device (2) for a folding door (11) having a first and a second door element (111, 112) which are hingedly connected to one another, with a first coupling wing (22A) which is connected to the first door element (111), and with a second coupling wing (22B) which is connected to the second door element (112), with a coupling shaft (81) by which the two coupling wings (22A, 22B) are connected to one another in an articulated manner, and with a mechanical energy store (27) , which acts on the two coupling wings (22A, 22B), characterized in that
that the two coupling wings (22A, 22B) each have a first wing part (221A; 221B), which is provided for connection to the associated first or second door element (111; 112), and a second wing part (222A; 222B) and a wing shaft ( 82A, 82B) hingedly interconnecting the corresponding first and second wing portions (221A, 222A; 221B, 222B); and
that a bearing body (21) is provided which holds a bearing element (211) for holding the coupling shaft (81) and at least one bearing piston (26) which is surrounded by a coil spring (27) which serves as an energy store, and which bearing body ( 21) is articulated by the two coupling wings (22A, 22B) to a loading carriage (23) which has a bearing opening (230) for receiving the at least one bearing piston (26) and which is mounted on the at least one bearing piston (26) in an axially displaceable manner is.

Description

The invention relates to a folding device for a folding door, in particular a folding sliding door, and a piece of furniture with a folding door, in particular a folding sliding door, which is provided with a folding device.

Sliding doors, optionally folding doors, are often used to close off openings in rooms or pieces of furniture, which are moved into a door compartment or into a parking space after the opening has been released, so as not to be a nuisance.

The US8336972B2 discloses a piece of furniture with a door compartment in which a displacement device is provided, by means of which the sliding door can be displaced within the door compartment. The displacement device comprises a holding device in the form of a pair of scissors, by means of which a stop profile connected to the sliding door is held in a vertical orientation. The displacement device also includes running rails, along which the stop profile is mounted in a displaceable manner by means of drives and can be pushed into the door compartment with practically no resistance.

The US9284761B2 discloses a piece of furniture with a displacement device by means of which a folding door can be displaced into a door compartment. The folding door comprises two door elements, of which the first door element is connected at the front to a carriage that can be moved along a running rail that has two rail sections that are aligned perpendicular to one another and are connected to one another by a curved section, one of which is guided into the door compartment. The second door panel is connected to the back with a stop profile, for example, according to the by a holding device US8336972B2 is held vertically.

To close the piece of furniture, the folding door is extended from the door compartment and unfolded. In the closed position, the door elements are aligned in a planar manner with respect to one another. In order to open the piece of furniture, the folding door is folded shut again, with the door elements assuming an angle not equal to 180° in an open position and being retracted into the door compartment, preferably aligned parallel to one another.

Devices are known from the prior art which support these folding processes, the unfolding or the folding of a folding door.

The JP2011162994A discloses a folding device which assists the unfolding of a folding door and is provided with a lever arm which is rotatably attached to a first door panel, is supported by a spring and is provided with a roller at an end piece which abuts the second door panel.

The DE202018100262U1 discloses a folding device which assists in the closing of a folding door and is provided with a lever arm which is rotatably attached to a first door panel, supported by a spring and guided with an end piece in a guide mounted on the second door panel.

The US2018119470A1 discloses another folding device which includes a pivoted lever arm and which assists in the folding of a folding door.

The disadvantage of these devices is that they take up a relatively large amount of space and have a complex design. Furthermore, these devices are designed to fulfill only one function.

From the US3846868A a hinge provided with a spring is also known, by means of which door elements which are connected to one another in an articulated manner are rotated either into the open position or into the closed position after a central position has been exceeded. The hinge is elaborately designed and requires fitting elements that are to be mounted on the upper edges of the door elements.

The present invention is therefore based on the object of creating an improved folding device by means of which a folding door can be folded or guided into a closed position or into an open position. Furthermore, a piece of furniture is to be created with a folding door that is equipped with the folding device.

The folding device should be simple in construction and easy to assemble. Furthermore, the folding device should be compact with small dimensions and take up little space.

The folding device should be able to be modified with little effort, so that the folding device can bring the folding door either from the closed position into an open position or from an open position into the closed position.

The folding device should preferably comprise a locking device which holds the planarly aligned door elements in the closed position. The locking of the door elements in the closed position should be canceled by pressing the door elements.

Preferably, the folding device should also fulfill a hinge function, so that the door elements alone by at least two Faltvor directions can be connected to each other in an articulated manner.

The piece of furniture equipped with at least one folding device should be easy to use and should not be subject to any significant restrictions with regard to the interior space. The door elements are to be released from the closed position in a simple manner and automatically moved as far as possible into an open position.

This object is achieved with a folding device according to claim 1 and a piece of furniture with at least one such folding device according to claim 11. Advantageous configurations of the invention are specified in further claims.

The folding device intended for a folding door, in particular a folding sliding door, having a first and a second door element which are hinged to one another, comprises a first coupling wing which is connected to the first door element and a second coupling wing which is connected to the second door element is connected to a coupling shaft, through which the two coupling wings are articulated to each other, and with a mechanical energy store which acts on the two coupling wings.

According to the invention, it is provided that the two coupling wings each have a first wing part, which is provided for connection to the associated door element, and a second wing part and a wing shaft, which articulately connects the first and second wing parts that correspond to one another, and that a bearing body is provided , which holds a bearing element for holding the coupling shaft and at least one bearing piston, which is surrounded by a helical spring that serves as an energy store, and which bearing body is connected in an articulated manner by the two coupling wings to a loading carriage, which has a bearing opening for receiving the at least one bearing piston and which is mounted in an axially displaceable manner on the at least one bearing piston.

The first door element of the folding door is connected by stop hinges, for example to a structural element such as a side wall or partition of the piece of furniture or to a stop profile that is held in a displaceable manner.

Two bearing pistons aligned parallel to one another are preferably held displaceably by the bearing body and give the folding device increased stability. Bearing bushes are preferably held in the bearing openings of the loading carriage, which ensure that the loading carriage is always held in an axially displaceable manner, aligned parallel to the bearing body.

With mutual rotations of the first wing parts connected to the door elements back and forth, the coupling wings are preferably folded up and down symmetrically to one another. During these processes, the loading carriage is moved back and forth along the bearing piston and the energy store is charged or discharged or the coil springs are tensioned or relaxed.

If the helical springs, which enclose the bearing pistons and form the energy store, serve as compression springs, the energy store is charged when the loading carriage travels in the direction of the bearing body. During this process, the door elements are transferred into the closed position in which they are aligned in a planar manner and are preferably locked by means of a locking device. The locking device is preferably integrated into the folding device, but can also be mounted externally, e.g.

If the locking of the door elements is released, the loading carriage is pushed back by the compressive force exerted by the coil springs and returned to the starting position. During this process, the first wing parts and thus the two door elements are rotated against one another and preferably aligned in parallel. The compression springs are held by the bearing pistons between the bearing body and the loading carriage and do not have to be fastened in order to develop the desired effect.

If, on the other hand, the helical springs are designed as tension springs and are connected to the bearing body with one end piece and to the loading carriage with the other end piece, the energy store is charged when the loading carriage travels in the direction away from the bearing body and is discharged again when it travels back in the direction of the bearing body . The energy store is therefore charged after the folding or the parallel alignment of the door elements, which is why the folding door is automatically partially or completely transferred into the closed position after it has been pulled out of the door compartment, in which the door elements are aligned parallel to one another. In this case, there is no need for a lock since the energy store is discharged.

The function of the folding device according to the invention can therefore be advantageously changed and adapted to the wishes of the user by a simple modification, by using the helical springs either as compression springs or tension springs.

In a preferred embodiment, it is provided that the first wing part of each coupling wing is connected to the coupling shaft with at least one first bearing element and to the wing shaft with at least one second bearing element, and that the second wing part of each coupling wing is connected to the wing shaft with at least one first bearing element and with at least a second bearing element is connected to a carriage shaft which is provided on the loading carriage separately or jointly for each coupling wing.

The bearing body preferably comprises two bearing feet, each holding a bearing piston and delimiting a bearing space through which the coupling shaft passes and in which the first bearing elements of the first wing parts are connected to the coupling shaft. In this way, a compact construction of the folding device is realized.

The folding device can be used in pieces of furniture in which separate locking devices are provided. It is preferably provided that the folding device comprises a locking device which can preferably be locked by moving the storage body and the loading carriage together and which can be unlocked again by moving the storage body and the loading carriage together.

In a preferred embodiment it is provided that the bearing body has a closure body which has a closure groove on one or both sides, into which a closure element that is connected to the loading carriage engages when the bearing body and the loading carriage move together.

The locking groove preferably runs around a central locking part and is designed in such a way that the associated locking element is guided cyclically around the locking part in the same direction during movements of the loading carriage and engages once in a locking area with each rotation and is released from the locking area again.

The folding door of a piece of furniture can advantageously be equipped with one or more folding devices according to the invention. The folding devices can perform the hinge function of the folding door alone or in combination with conventional hinges. The folding device can be provided with a compression spring or a tension spring according to the desired function. In the case of pieces of furniture with a folding door, which is transferred from a closed position into an open position by the folding device, a locking device is preferably provided which can be unlocked by pressing on the door elements. The locking device is preferably integrated into the folding device, but can also be mounted externally, e.g.

Additionally or alternatively, the at least one folding door, optionally a folding sliding door, can be provided with a pulling device according to the invention, by means of which the folding door can be automatically transferred from the closed position into an open position, optionally with the door elements being aligned in parallel.

The traction device comprises a first traction device mountable on the first door panel and a second traction device mountable on the second door panel, and a traction cable by which the first and second traction device units are connected to each other.

It is provided that the first pulling device unit has a first pulling device body provided for mounting on the first door element and a tension spring mounted in the first pulling device body, which has a first end piece with a first holding element mounted on a first end of the first pulling device body and which has a second end piece with a first end piece of the traction cable, which is guided via a first deflection element mounted on a second end of the first traction device body to the second traction device unit, which has a second traction device body provided for installation on the second door element, on which a second holding element is mounted at a first end to which the traction cable is connected.

In a preferred embodiment, it is provided that a first end piece of a spring bar, for example a leaf spring, is mounted on a second end of the second pulling device body, which has an exposed second end piece, by which a second deflection element is held, via which the pull cable to the second holding element is led.

Preferably, the traction device units are mounted horizontally or perpendicularly to the hinge axis of the folding door. In order that the traction device units do not collide when the door elements are folded together, they are preferably arranged offset one above the other vertically or parallel to the hinge axis of the folding door.

Provision is preferably made for the first pulling device unit to be mounted on the first door element in such a way that the first retaining element faces the hinge axis of the folding door and the first deflection element faces away from the hinge axis and that the preferably horizontally aligned second pulling device unit is mounted on the second door element in such a way that the spring rod with the second deflection element faces the hinge axis of the folding door and the second holding element faces away from the hinge axis, with the first holding element being connected to the pull cable via the tension spring is, which is guided over the first deflection element and the second deflection element, such as an eyelet or a roller, to the second holding element. With this arrangement of the towing device units, an optimum effect of the towing device is achieved. When the folding door is in the folded state, the traction cable runs between the ends of the two traction device units that are at a distance from one another.

As soon as the door elements are released from the planar alignment and a sufficiently high torque is exerted on the door elements by the traction cable or the tension spring, the door elements are rotated against one another at an accelerated rate. During this process, the spring rod, if necessary the leaf spring, is first pulled outwards at the front. As soon as the door elements are folded against each other, the force in the pull cable is reduced so that the pull cable is guided by the spring bar against the associated door element.

At least one of the deflection elements is preferably a deflection roller which is held by a deflection bearing. The deflection bearing is preferably held by means of a pivot bearing so that it can be rotated upwards or downwards. By tipping the deflection roller downwards or upwards, the traction cable is automatically guided past the first traction device unit at the top or bottom when the door elements are folded together.

The first and/or the second holding element is preferably held by a holding carriage which can be displaced and locked along a holding rail. The traction cable can therefore be pretensioned as desired so that on the one hand the force required to planarly align the door elements in the closed position is not too high and on the other hand the force to unfold the door elements into the open position is sufficiently high.

In the case of planarly aligned door elements, the traction cable preferably runs parallel thereto and does not exert any torque on the door elements. The door elements are fixed in the closed position and can be secured with simple means. The folding door can now be opened by means of the folding device described or in a simple manner by means of an externally mounted spring, for example a leaf spring or a spiral spring. By pressing the door elements perpendicularly in the direction of the piece of furniture, the compression spring is charged, which then initiates the folding process and opens the folding door so far that the pulling device can take effect.

The pulling device and the folding device can advantageously be combined with one another. Provision can be made for the door elements to be rotated from the closed position into an open position by the pulling device and then converted into a parallel alignment by the folding device. Alternatively, it can be provided that the pulling device is provided for moving the door elements from the closed position into an open position and the folding device is provided for unfolding the door elements aligned parallel to one another.

• 1 ein erfindungsgemässes Möbelstück 1 in der Ausgestaltung eines Schrankes 1 mit einem ersten Türfach 10, in das eine in Schliessstellung gezeigte Falttür 11 die je ein erstes und ein zweites Türelement 111, 112 aufweist, die durch wenigstens eine erfindungsgemässe Faltvorrichtung 2 miteinander verbunden sind, einschiebbar ist und mit einem zweiten Türfach 10, in das eine einteilige Schiebetür 11 eingeschoben wurde;
• 2 die aus der Schliessstellung von 1 in eine Offenstellung überführte Falttür 11, die durch Anschlagscharniere 55 mit dem Anschlagprofil 5 einer Verschiebevorrichtung 9 verbunden ist, das durch eine Scherenvorrichtung 4 in senkrechter Ausrichtung gehalten und das am oberen Ende mit einem oberen Führungslaufwerk 71 und am anderen Ende mit einem unteren Führungslaufwerk 72 verbunden ist, die entlang von oberen und unteren Führungsschienen 91, 92 verschiebbar sind und mit einer Laufschiene 93, entlang der ein Frontlaufwerk 73, das mit der vorlaufenden Kante des zweiten Türelements 112 der Falttür 11 verbunden ist, entlang der Front des Schrankes 1 und zusammen mit der gefalteten Falttür 11 in das Türfach 10 hinein verschiebbar ist;
• 3a einen Teil der Verschiebevorrichtung 9 von 2 mit der fast vollständig gefalteten Falttür 11 mit dem ersten Türelement 111, das mit der nachlaufenden Kante mit dem Anschlagprofil 5 verbunden ist, und dem zweiten Türelement 112, das mit der vorlaufenden Kante durch ein Laufwerksscharnier 77 mit dem Frontlaufwerk 73 verbunden ist, welches innerhalb eines Kurvenabschnitts 933 der Laufschiene 93 gehalten ist;
• 3b das Frontlaufwerk 73 von 3a mit einem Segment der Laufschiene 93;
• 4 die aus der Schliessstellung von 1 in die Offenstellung von 2 überführte Falttür 11 mit dem ersten Türelement 111 und dem zweiten Türelement 112, die auf der dem Möbelstück 1 zugewandten Seiten mit der Faltvorrichtung 2 und einer Zugvorrichtung 3 ausgerüstet, sowie durch ein optionales Türscharnier 119 miteinander verbunden sind;
• 5 die Falttür 11 von 4 in der Position von 3a mit dem teilweise gezeigten ersten Türelement 111 und dem zweiten Türelement 112, die fast parallel zueinander ausgerichtet sind und zwischen denen die Faltvorrichtung 2 und die Zugvorrichtung 3 angeordnet sind;
• 6a die Faltvorrichtung 2 von 5 in Explosionsdarstellung mit einem Lagerkörper 21, der einen Teil einer Verschlussvorrichtung und zwei Lagerkolben 26 trägt und der durch zwei zueinander symmetrisch angeordnete Kopplungsflügel 22A, 22B, die je zwei gelenkig miteinander verbundene Flügelteile 221A, 222A; 221B, 222B aufweisen, mit einem Ladeschlitten 23 verbunden oder verbindbar ist, der auf den Lagerkolben 26 verschiebbar gelagert wird, die je von einer Schraubenfeder 27 umschlossen sind, die einerseits mit dem Lagerkörper 21 und andererseits mit dem Ladeschlitten 23 zusammenwirken;
• 6b einen Teil des Lagerkörpers 21 von 6a mit einem Verschlusskörper 212, der beidseits eine Verschlussnut 6A, 6B aufweist, in die Verschlusselemente 28A, 28B eingreifen können, welche als Endstücke einer vorzugsweise rechteckförmigen Verschlussstange 28 vorgesehen sind;
• 7a die Faltvorrichtung 2 von 6a mit Blick auf den Ladeschlitten 23 in einem Zustand bei parallel zueinander ausgerichteten Türelementen 111, 112 (links); bei gegeneinander abgewickelten Türelementen 111, 112 (Mitte) und bei planar ausgerichteten Türelementen 111, 112 (rechts)
• 7b die Faltvorrichtung 2 in den Zuständen von 7a mit Blick auf den Lagerkörper 21; und
• 8a - 8f die Faltvorrichtung 2 von 6a ohne die Kopplungsflügel 22A, 22B in verschiedenen Verschlusspositionen, in denen die Verschlusselemente 28A, 28B die Verschlussnut 6A; 6B durchlaufen.

The invention is explained in more detail below with reference to drawings. It shows:

• 1 a piece of furniture 1 according to the invention in the configuration of a cupboard 1 with a first door compartment 10, into which a folding door 11, shown in the closed position, which has a first and a second door element 111, 112, which are connected to one another by at least one folding device 2 according to the invention, can be inserted and with a second door compartment 10 into which a one-piece sliding door 11 has been inserted;
• 2 from the closed position of 1 into an open position, which is connected by stop hinges 55 to the stop profile 5 of a displacement device 9, which is held in a vertical orientation by a scissor device 4 and which is connected at the upper end to an upper guide carriage 71 and at the other end to a lower guide carriage 72 is slidable along upper and lower guide rails 91, 92 and having a running rail 93 along which a front bogie 73 connected to the leading edge of the second door panel 112 of the folding door 11 along the front of the cabinet 1 and together with the folded folding door 11 is slidable into the door compartment 10;
• 3a a part of the displacement device 9 of 2 with the almost completely folded folding door 11 with the first door element 111, which is connected to the trailing edge with the stop profile 5, and the second door element 112, which is connected to the leading edge by a running gear hinge 77 with the front running gear 73, which is within a Curve portion 933 of the slide rail 93 is held;
• 3b the front drive 73 from 3a with a segment of the running rail 93;
• 4 from the closed position of 1 into the open position of 2 converted folding door 11 with the first door element 111 and the second door element 112, which are equipped on the side facing the piece of furniture 1 with the folding device 2 and a pulling device 3, and are connected to one another by an optional door hinge 119;
• 5 the folding door 11 from 4 in the position of 3a with the partially shown first door element 111 and the second door element 112, which are aligned almost parallel to each other and between which the folding device 2 and the pulling device 3 are arranged;
• 6a the folding device 2 of 5 in an exploded view with a bearing body 21, which carries part of a closure device and two bearing pistons 26 and by two mutually symmetrically arranged coupling wings 22A, 22B, each of which has two hingedly connected wing parts 221A, 222A; 221B, 222B, is connected or connectable to a loading carriage 23 which is slidably mounted on the bearing pistons 26, each of which is surrounded by a helical spring 27 which cooperates on the one hand with the bearing body 21 and on the other hand with the loading carriage 23;
• 6b a part of the bearing body 21 of 6a with a closure body 212, which has a closure groove 6A, 6B on both sides, into which closure elements 28A, 28B can engage, which are provided as end pieces of a preferably rectangular closure rod 28;
• 7a the folding device 2 of 6a with a view of the loading carriage 23 in a state with door elements 111, 112 aligned parallel to one another (left); with door elements 111, 112 (middle) developed against each other and with door elements 111, 112 aligned in a planar manner (right)
• 7b the folding device 2 in the states of 7a with a view of the bearing body 21; and
• 8a - 8f the folding device 2 of 6a without the coupling wings 22A, 22B in different locking positions, in which the locking elements 28A, 28B the locking groove 6A; 6B go through.

1 shows a piece of furniture 1 according to the invention in the form of a cupboard 1 with a first door compartment 10, from which a folding door 11 has been pulled out, and a second door compartment 10, into which a one-piece sliding door 11 has been pushed. The folding door 11 has a first and a second door element 111, 112, which are connected to one another by at least one folding device 2 according to the invention. The folding door 11 is unfolded so that the door elements 111, 112 are aligned in one plane and cover two-thirds of the cabinet opening 100.

1 shows further that the piece of furniture 1, for example a cupboard, has side walls 12, a top panel 14, a bottom panel 15 and partitions 13, which each delimit a door compartment 10 with a side wall 12.

Like this too 2 shows, the trailing edge of the first door element 111 when the sliding door 11 is extended is connected by stop hinges 55 to a stop profile 5 which, while being vertically aligned, can be displaced within the door compartment 10 . The leading edge of the first door element 111 is connected by at least one folding device 2 according to the invention and optionally door hinges 119 to the trailing edge of the second door element 112, the leading edge of which is connected at the top to a front running gear 73 (see also 3a) . The front drive 73 is guided in a rail 93, the one along the front of the cabinet 1 of 1 has running front section 932, which are connected on both sides by curve sections 933 with door compartment sections 931, which extend into the door compartments 10.

The metal stop profile 5 is provided with a cross-sectional profile that allows the mentioned hinges 55 and bearing devices 412, 421 and drives 71, 72 to be installed in a simple manner and preferably to be held in a form-fitting manner.

By means of the bearing devices 412, 421, the stop profile 5 is connected to a holding device 4 in the form of a scissors cross, which holds the stop profile 5 vertically aligned and displaceable. The scissor cross 4 comprises a first scissor arm 41 and a second scissor arm 42 which are rotatably connected to one another by a scissor joint 43 . The ends of the scissor arms 41 , 42 facing the stop profile 5 are connected to the bearing devices 412 , 421 on the stop profile 5 . The ends of the scissor arms 41, 42 that are remote from the stop profile 5 are connected to bearing devices 411, 422 that are stationarily mounted in the cabinet 1. The lower ends of the scissor arms 41, 42 are rotatably, but not slidably, supported by the lower bearing devices 412, 422. The upper ends of the scissor arms 41, 42 are supported by the upper bearing devices 411, 421 in a rotatable and vertically displaceable manner. When folding or unfolding the scissors cross 4, the upper ends of Sche Renarme 41, 42 move accordingly, the stop profile 5 is always kept in a vertical orientation.

Furthermore, the upper end piece of the stop profile 5 is connected to an upper guide mechanism 71 which is slidably mounted on an upper guide rail 21 . The lower end piece of the stop profile 5 is connected to a lower guide mechanism 72, which is slidably mounted on a lower guide rail. The guide rails 21, 22 are aligned parallel to one another and perpendicular to the stop profile 5 and are connected, for example, directly or indirectly to the top panel 14, the bottom panel 15, a side wall 12 and/or an intermediate wall 13. When the sliding door 11 is folded, the stop profile 5 can thus be pushed into the door compartment 10 up to a first stop and out of the door compartment 10 again up to a second stop.

Optionally, drive devices 96, 98 can be provided, by means of which the stop profile 5 and the sliding door 11 connected to it can be correspondingly displaced.

2 also shows damping devices 95 which are mounted inside the door compartment 10, for example on a rear wall, partition wall or side wall of the cabinet 1 and which catch the sliding door 11 in an end position.

3a shows a part of the displacement device 9 of FIG 2 with a view of the entrance of the first door compartment 10, with the first door element 111, which is connected to the trailing edge inside the door compartment 10 with the stop profile 5, and the second door element 112, which is connected to the front drive with the leading edge by a drive hinge 77 73 is connected, which is held within a curved section 933 of the running rail 93. The movements of the trailing edge of the first door element 111 and the leading edge of the second door element 112 when entering and exiting the door compartment 10 are shown with two arrow lines M11, M12.

3b shows the front drive 73 of FIG 3a with a segment of the running rail 93, which has a rail foot 938 and a guide channel 939. The front running gear 73 has a running gear body 730 which holds a roller 731 that has fallen onto the rail foot 938 and two guide rollers 732 guided in the guide channel 939 . In addition, a coupling element or a coupling bolt 733 is mounted in the carriage body 730, by means of which a coupling arm 734 is held and optionally adjustable in height. The linkage arm 734 supports a deck hinge 77 mounted on the leading edge of the second door panel 112. As shown in FIG.

4 shows the from the closed position of 1 into the open position of 2 converted folding door 11 with the first door element 111 and the second door element 112, which are rotatable about a hinge axis x in relation to one another. On the sides facing the piece of furniture 1, the door elements 111, 112 are equipped with the folding device 2 and a pulling device 3, and are connected to one another by an optional door hinge 119. The folding device 2 and the pulling device 3 complement each other advantageously, but can also be used independently of one another.

By means of the folding device 2, the folding door 11, depending on the configuration of the folding device 2 from the closed position 1 in an open position, for example 2 or 3 or from the open position of eg from 2 or 3 into the closed position of 1 be transferred.

By means of the traction device 3, which has two traction device units 31, 32 connected to one another by a traction cable 33, the folding door 11 can be moved from the closed position of 1 into an open position (see e.g 3 ) are transferred.

The traction device 3 comprises a first traction device unit 31, which is mounted on the first door element 111, and a second traction device unit 32, which is parallel to the hinge axis x of the folding door 11 and displaced downwards relative to the first traction device unit 31 on the second door element 112.

The first hitch unit 31 has an elongated first hitch body 310 bolted to the first door panel 111 . A first holding element or a first holding pin 311 is held at an end of the first pulling device body 310 which faces the hinge axis x. A first end piece 3121 of a tension spring 312 is suspended in the first retaining bolt 311 , the second end piece 3122 of which is connected to the tension cable 33 , which is guided to the second tension device unit 32 via a first deflection element 313 . The pull rope is in 4 and in 5 shown in phantom. The first deflection element 313 is held at an end of the first traction device body 310 which faces away from the hinge axis x.

The first deflection element 313 is a deflection roller which is rotatably held by a deflection bearing 3130 . The deflection bearing 3130 is held by a rotary bearing 3131 in such a way that it can tilt downwards or can be rotated downwards by the traction cable 33 during the folding process.

The second hitch assembly 32 includes an elongated second hitch body 320 bolted to the second door panel 112 . At the end of the second pulling device body 320, which faces the hinge axis X, a spring rod in the form of a leaf spring 324 protrudes from the pulling device body 23, which is connected to a second deflection element 325 on the front near the hinge axis x. The rear end of the leaf spring 324 is held in the hitch body 320 by a jig 3249 . In this embodiment, the second deflection element 325 forms an eyelet through which the traction cable 33 is guided to a second holding element 321 which is held at an end of the second traction device unit 32 remote from the hinge axis x. The second holding element 321, for example a bolt, is preferably held by a holding carriage 322, which can be displaced and fixed along a carriage track 323. By moving the holding carriage 322, the tension spring 312 can be pretensioned as required.

When the door elements 111, 112 are rotated into the closed position, the two traction device units 31, 32 are rotated apart, as a result of which the tension spring 312 is tensioned. In the closed position of 1 the traction cable 33 is aligned parallel to the door elements 111, 112, which is why, despite the high spring force of the tensioned tension spring 312, only a very small torque is exerted on the door elements 111, 112. The folding door 11 can therefore be fixed in the closed position in a simple manner. In order to transfer the folding door 11 from the closed position back to the open position, a spring element is preferably provided, which can be tensioned by pressure and subsequently pushes the door elements 111, 112 out at the edges facing one another so far that the tension cable 33 causes this Torque now for folding the door elements 111, 112 is sufficient.

In preferred embodiments, this initial ejection function is performed by a folding device 2, which is provided with a mechanical energy store that can be charged and locked by pressing the folding door 11 and unlocked again by pressing the folding door 11 again, as described below .

As soon as the folding door 11 is in the closed position 1 has left, 33 torques are exerted on the door elements 111, 112 by the deflection elements 313, 325 acting on the tensile forces of the traction cable, which accelerate the folding process. During the folding process, the pull cable 33 exerts a force on the front end piece of the leaf spring 324, which is bent outwards and now also pulls the first door element 111 against the second door element 112. However, the primary function of the spring bar, optionally in the form of a leaf spring 324, is to hold the lift cord 33 in position when the door panels 111, 112 are folded.

Each of the hinges 119 and each of the folding devices 2 can have its own coupling shaft 81 . The hinges 119 and/or the folding devices 2, on the other hand, can have a common coupling shaft.

5 shows the folding door 11 of 4 in the position of 3a with the partially shown first door element 111 and the second door element 112, which are aligned almost parallel to each other and between which the folding device 2 and the pulling device 3 are arranged.

It is shown that the first pulling device unit 31 lies above the second pulling device unit 32, as a result of which the two door elements 111, 112 can be aligned parallel to one another. The first deflection roller 313 has tilted downwards. It is shown by way of example that the second deflection element 325 can also be a roller, which is held by means of a deflection bearing 3250, which is optionally connected to the front end of the leaf spring 324 by a pivot bearing 3251. In preferred embodiments, the front end piece of the leaf spring 324 is designed in the shape of a fork, so that a roller can be held by means of a bearing shaft which is connected to the fork ends of the leaf spring 324 .

In this position of the door elements 111, 112, the function of the leaf spring 324 is clearly visible, which holds the traction cable 33 in position so that it does not hang down and become a nuisance.

6a shows the folding device 2 of FIG 4 and 5 in exploded view.

The 7a and 7b show the folding device 2 in different states with the assembled device parts 21, 22A, 22B, 23 connected to one another by a coupling shaft 81, two vane shafts 82A, 82B and two carriage shafts 83A, 83B.

The folding device 2 comprises a first coupling wing 22A, which can be connected to the first door element 111, and a second coupling wing 22B, which can be connected to the second door element 112, and a coupling shaft 81, by which the two coupling wings 22A, 22B are connected to one another in an articulated manner . A mechanical energy store in the form of two helical springs 27 is also provided, which can act on the two coupling wings 22A, 22B. the fold Device 2 is symmetrical, which is why the description of one side of the folding device 2 with the first coupling wing 22A also applies to the other side of the folding device 2 with the second coupling wing 22B. In the exploded view of 6a however, all parts of the device are shown individually, which is why the description of the folding device according to 7a and 7b also on the 6a is referenced.

The two coupling wings 22A, 22B each have a first wing part 221A; 221B for connection to the associated first or second door panel 111; 112 is provided, and a second wing portion 222A; 222B and a vane shaft 82A, 82B having the first and second vane parts 221A, 222A; 221B, 222B hinged together. The first wing parts 221A; 221B are provided with openings 2210 through which mounting screws can be guided, by means of which the folding device 2 is connected to the two door elements 111, 112.

Furthermore, a bearing body 21 is provided which has bearing elements 211 for holding the coupling shaft 81 and holds two bearing pistons 26 which are each enclosed by a helical spring 27 which serves as an energy store. The bearing body 21 is articulated to a loading carriage 23 on both sides by the two coupling wings 22A, 22B. The plate-shaped loading carriage 23 has bearing openings 230 for receiving the bearing pistons 26 . Bearing bushes 25 are inserted into the bearing openings 230 and ensure precise guidance of the bearing pistons 26 or precise alignment of the loading carriage 23 . The loading carriage 23 is therefore mounted on the bearing piston 26 so that it can be displaced axially against the bearing body 21 .

The first wing part 221A; 221B of each coupling vane 22A, 22B is connected to the coupling shaft 81 by two first bearing elements 2211 and to the vane shaft 82A, 82B by a second bearing element 2212. The second wing part 222A; 222B of each coupling wing 22A, 22B is connected to the wing shaft 82A, 82B by two first bearing elements 2221 and to a carriage shaft 83A, 83B by two second bearing elements 2222. The carriage shafts 83A, 83B are supported separately from each other in bearing members 231A, 231B on opposite sides of the loading carriage 23. As shown in FIG.

6a and 7b also show that the bearing elements 211 of the bearing body 21 are designed as bearing feet, each of which holds one of the bearing pistons 26 and delimit a bearing space 210 through which the coupling shaft 81 passes and in which the overlapping first bearing elements 2211 of the first wing parts 221A; 221B and connected to the coupling shaft 81.

In preferred configurations, the folding device 2 comprises a locking device which can be locked by moving the bearing body 21 and the loading carriage 23 together and which can be unlocked again by moving the bearing body 21 and the loading carriage 23 together. The folding device 2 is preferably locked when the energy storage device is charged, in order to prevent it from being discharged and the door elements 111, 112 from moving undesirably.

The elements of the locking device are described with reference to 6a and 6b described. The function of the locking device is described below and is in the 8a until 8f shown.

The locking device comprises a locking body 212 which is part of the bearing body 21 and faces the loading carriage 23 . The closure body 212 has one or both sides (see 6b) a locking groove 6A, 6B, in each of which a locking element 28A; 28B, which is connected to the loading carriage 23, engages when the bearing body 21 and the loading carriage 23 are moved together. The two locking grooves 6A, 6B are formed as mirror images, so that the two locking elements 28A; 28B are always coaxially aligned and parallel to each other.

Each locking groove 6A, 6B encloses a central locking part 66 which has a detent depression 661 . The locking groove 6A, 6B and the locking part 66 are designed in such a way that the associated locking element 28A; 28B when the loading carriage 23 moves within the locking groove 6A, 6B cyclically in the same direction around the locking part 66 and engages once in the detent depression 661 with each revolution and is released again from the detent depression 661 when the loading carriage 23 moves further relative to the bearing body 21 becomes. The flanks of the locking groove 6A, 6B and, if applicable, the shape of the locking element 28A; 28B are selected in such a way that the closure element 28A; 28B retreating in the locking groove 6A, 6B is always prevented.

The locking groove 6A, 6B has an entry area 61 into which the locking element 28A; 28B can enter and exit again. On the lower side of the closure part 66, which is at least approximately heart-shaped, the entry region 61 is adjoined by a lead region 62, which opens into a latching region 63 running inclined upwards, in which the closure element 28A; 28B fall back and rest sink 661 can occur, in which the closure element 28A; 28B is held positively on the one hand by the force of the coil springs 27 and on the other hand by the shape of the closure part 66 or the detent recess 661 until a further mutual displacement of the loading carriage 23 relative to the bearing body 21 follows. If a further mutual displacement of the loading carriage 23 occurs in relation to the bearing body 21, the closure element 28A; 28B is raised from the detent depression 661 and guided further along the locking groove 6A, 6B through a return area 64 into the entry area 61 of the locking groove 6A, 6B, where it is released again from the locking body 212.

In the embodiment shown, the closure elements 28A, 28B are mutually aligned end pieces of a closure rod 28, which in this preferred embodiment is at least approximately rectangular in shape and is mounted on the loading carriage 23 by means of a retaining bracket 238 and assembly screws 239.

The locking bar 28 has a center piece 28C which is held at the rear of the loading carriage 23 by the retaining bracket 238 such that the side arms are directed through slots in the loading carriage 23 forwards against the bearing body 21 (see the dot-dash line).

7a shows the folding device 2 of FIG 6a with a view of the loading carriage 23 in a state with door elements 111, 112 aligned parallel to one another according to 5 (Left); with door elements 111, 112 developed against one another according to FIG 4 (middle) and with planar aligned door elements 111, 112 according to FIG 1 (to the right).

7b shows the folding device 2 in the states of FIG 7a with a view of the bearing body 21 in a state with planar aligned door elements 111, 112 according to 1 (left), in accordance with door elements 111, 112 unwound against one another 4 (centre) and with door elements 111, 112 aligned parallel to one another according to FIG 5 (to the right).

In the entire range of displacement of the door elements 111, 112, the first end piece of each coil spring 27 rests on the bearing body 21 and the second end piece of each coil spring 27 on the loading carriage 23. If the helical springs 27 are designed as compression springs, the end pieces of the helical springs 27 are automatically pressed against the bearing body 21 and the loading carriage 23 . If the helical springs 27 are provided as tension springs, the end pieces of the helical springs 27 are firmly connected to the bearing body 21 on the one hand and to the loading carriage 23 on the other hand. For example, the last turn of the helical springs 27 is firmly clamped by a fixing bracket which is screwed to the bearing body 21 or the loading carriage 23 .

When the helical springs 27 are designed as compression springs, the loading carriage 23 is permanently pushed away, with the folding device 2 rotating the door elements 111, 112 in opposite directions after they have been unlocked. Once this state as it is in 5 is shown is reached, the energy store or the coil springs 27 are discharged and must be reloaded by manual mutual rotation of the door elements 111, 112.

When the coil springs 27 are designed as tension springs, the loading carriage 23 is permanently pulled against the bearing body 21, with the folding device 2 rotating the door elements 111, 112 apart after they have been released. In the state of 5 the helical springs 27 are therefore loaded or tensioned, and discharged with a rotation to the closed position of 1 (please refer 7b , the folding device 2) shown on the left is reached. In this state of 1 if the energy store or the coil springs 27 are discharged and must be reloaded by manual mutual rotation of the door elements 111, 112.

The prestressing of the helical springs 27 can be adjusted in preferred configurations of the folding device 2 . For this purpose, the bearing pistons 26 are preferably provided with a thread in the area of the bearing body 21 which holds an adjusting nut which can be turned against the associated helical spring 27 .

The figures 8a until 8f show the folding device 2 of FIG 6a without the coupling wings 22A, 22B in different locking positions, in which the locking elements 28A, 28B the locking groove 6A; 6B go through. In this embodiment, the coil springs 27 are designed as compression springs.

In 8a the locking rod 28 is detached from the locking body 212 . In 8b the loading carriage 23 is pushed against the bearing body 21 and the locking elements of the locking rod 28 enter the associated locking groove 6 on the underside of the heart-shaped locking part 66 . In 8c the closure elements of the closure rod 28 have reached the position in front of the detent depression 661 and are pushed into the detent depression 661 by returning the loading carriage 23 and held there. In 8d the loading carriage 23 is again guided against the bearing body 21, as a result of which the locking elements of the locking rod 28 are lifted out of the detent recess 661 and shifted upwards in the locking groove 6 be practiced In 8e the loading carriage 23 is moved back again by the compression springs 27, as a result of which the locking elements of the locking rod are guided again above the locking part 66 in the associated locking groove 6 to the entrance of the locking body 212. 8f shows the condition of the folding device 2 from FIG 8a .

Reference List

1

Arrangement, piece of furniture, cabinet

10

first or second door compartment 10 or parking space

100

Interior of assembly 1

11

folding door

111

first door panel

112

second door panel

119

door hinges

12

Outer wall delimiting the door compartment 10

13

Inner wall delimiting the door compartment 10

14

Arrangement top shelf 1

15

sub-floor of the arrangement 1

2

folding device

21

bearing body

210

storage room

211

bearing feet

212

closure body

22A, 22B

coupling wings

221A, 221B

first wing parts

2210

Holes for mounting screws

2211, 2212

Bearing elements of the first wing part

222A, 222B

second wing parts

2221, 2222

Bearing elements of the second wing part

23

loading carriage

230

storage openings

231A, 231B

storage elements

238

mounting bracket

239

Bracket mounting screw 29

25

bearing bushes

26

bearing piston

27

Energy storage, coil springs

28

locking bar

28A, 28B

closure elements

3

pulling device

31

first drawbar unit

310

first drawbar body

311

first retaining element, retaining bolt

312

first spring element, coil spring

3121, 3122

Connection rings of the tension spring

313

first deflection element, first deflection roller

3130

first deflection bearing

3131

first pivot

32

second drawbar unit

320

second device body

321

second retaining element, retaining bolt

322

holding slide

323

toboggan run

324

Spring rod, preferably leaf spring

3249

Assembly device for the leaf spring 324

325

second deflection element, second deflection roller

3250

second deflection bearing

3251

second pivot bearing

33

pull rope

4

Holding devices, scissor device

41, 42

first and second scissor arm

411, 412

Shear bearing of the first scissor arm 41

421, 422

Scissor stay bearing of the second scissor arm 42

43

shear bearing

5

stop profile

55

stop hinges

6A, 6B

locking grooves

61

entrance area

62

lead area

63

rest area

64

return area

66

Locking part with locking sink 661

661

detent sink

71

upper guide drive

711

upper drive rollers

715

Mounting flange of the guide bogies 71, 72

718

upper drive arm

719

upper coupling part

72

lower guide drive

728

lower drive arm

721

lower drive rollers

729

lower coupling part

73

front drive

730

drive body

731

roller

732

guide rollers

733

Coupling element, coupling bolt

734

coupling arm

77

drive hinge

81

coupling shaft

82A, 82B

propeller shafts

83A, 83B

carriage shafts

9

shifting device

91

upper guide rail

92

lower guide rail

93

running rail

931

Door compartment section of the track 93

932

Front section of the running rail 93

933

curve section

938

Rail base of the running rail 93

939

Guide channel of the running rail 93

95

damping elements

96

first drive device

98

second drive device

M11

Course of movement of the first door element 111

M12

Course of movement of the second door element 112

X

hinge axis

QUOTES INCLUDED IN DESCRIPTION

This list of documents cited by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent Literature Cited

• US 8336972 B2 [0003, 0004]
• US 9284761 B2 [0004]
• JP2011162994A [0007]
• DE 202018100262 U1 [0008]
• US2018119470A1 [0009]
• US3846868A [0011]

Claims (15)

Folding device (2) for a folding door (11) having a first and a second door element (111, 112) which are hingedly connected to one another, with a first coupling wing (22A) which is connected to the first door element (111), and with a second coupling wing (22B) which is connected to the second door element (112), with a coupling shaft (81) by which the two coupling wings (22A, 22B) are connected to one another in an articulated manner, and with a mechanical energy store (27) , which acts on the two coupling wings (22A, 22B), characterized in that the two coupling wings (22A, 22B) each have a first wing part (221A; 221B) which is intended for connection to the associated first or second door element (111; 112) is provided, and a second wing part (222A; 222B) and a wing shaft (82A, 82B) which connects the mutually corresponding first and second wing parts (221A, 222A; 221B, 222B) to one another in an articulated manner; and that a bearing body (21) is provided, which holds a bearing element (211) for holding the coupling shaft (81) and at least one bearing piston (26), which is surrounded by a coil spring (27) serving as energy storage, and which bearing body (21) is articulated by the two coupling wings (22A, 22B) to a loading carriage (23) which has a bearing opening (230) for receiving the at least one bearing piston (26) and which can be displaced axially on the at least one bearing piston (26). is stored. Folding device (2) after claim 1 , characterized in that the two coupling wings (22A, 22B) are arranged symmetrically to the bearing body (21) and to the bearing piston (26). Folding device (2) after claim 1 or 2 , characterized in that the helical spring (27) is used as a compression spring or that the helical spring (27) is connected to the bearing body (21) and the loading carriage (23) and is used as a tension spring. Folding device (2) after claim 1 , 2 or 3 , characterized in that the first wing part (221A; 221B) of each coupling wing (22A, 22B) has at least one first bearing element (2211) with the coupling shaft (81) and with at least one second bearing element (2212) with the wing shaft (82A, 82B ) and that the second wing part (222A; 222B) of each coupling wing (22A, 22B) is connected to the wing shaft (82A, 82B) with at least one first bearing element (2221) and with at least one second bearing element (2222) with one or one each associated carriage shaft (83A, 83B), which is or are held in bearing elements (231A, 231B) of the loading carriage (23) together or separately for each coupling vane (22A, 22B). Folding device (2) according to one of Claims 1 - 4 , characterized in that in each bearing opening (230) a bearing bush (25) is provided, into which the associated bearing piston (26) can be inserted. Folding device (2) according to one of Claims 1 - 5 , characterized in that two parallel aligned bearing pistons (26) are provided. Folding device (2) after claim 6 , characterized in that the bearing body (21) comprises two bearing feet (211), each holding a bearing piston (26) and delimiting a bearing space (210) which is penetrated by the coupling shaft (81) and in which the first bearing elements ( 2211) of the first wing parts (221A; 221B) are connected to the coupling shaft (81). Folding device (2) according to one of Claims 1 - 7 , characterized in that the folding device (2) comprises a locking device (212, 28) which can be locked by moving the bearing body (21) and the loading carriage (23) together and which can be locked by moving the bearing body (21) and the loading carriage (23) together can be unlocked again. Folding device (2) after claim 8 , characterized in that the bearing body (21) has a closure body (212) which has a closure groove (6A, 6B) on one or both sides, in each of which a closure element (28A; 28B) which is connected to the loading carriage (23). , engages when the bearing body (21) and the loading carriage (23) are moved together. Folding device (2) according to one of Claims 1 - 9 , characterized in that each locking groove (6A, 6B) encloses a central locking part (66) which has a latching depression (661) and is designed in such a way that the associated locking element (28A; 28B) when the loading carriage (23) moves within the locking groove (6A, 6B) is guided cyclically around the locking part (66) in the same direction and engages once in the locking depression (661) and is released from the locking depression (661) again during each rotation. Piece of furniture (1) with a folding door (11), which has two door elements (111, 112) which are articulated to one another and can be rotated in opposite directions about a hinge axis (x), which can be rotated by a folding device (2) according to one of the Claims 1 - 10 , which are without locking device or with a lock gel device is equipped, are connected to each other. Piece of furniture (1) in particular claim 11 , characterized in that a traction device (3) is provided, comprising a first traction device unit (31) mounted on the first door element (111) and a second traction device unit (32) which is at the same level or parallel to the hinge axis (x) is mounted on the second door element (112) displaced relative to the first pulling device unit (31), and which each have a holding element (311, 321) which is guided by a pulling cable (33) over at least one first deflection element (313). and at least one tension spring (312), such as a coil spring, are interconnected. piece of furniture (1) after claim 12 , characterized in that the first pulling device unit (31), which is preferably aligned perpendicularly to the hinge axis (x), is mounted on the first door element (111) in such a way that the first holding element (311) faces the hinge axis (x) of the folding door (11) and the first The deflection element (313) faces away from the hinge axis (x) and that the second pulling device unit (32), which is preferably aligned perpendicularly to the hinge axis (x), is mounted on the second door element (112) in such a way that the second holding element (321) moves from the hinge axis (x ) faces away, wherein the first holding element (311) is connected via the tension spring (312) to the pull cable (33), which is guided via the first deflection element (313) to the second holding element (321). piece of furniture (1) after claim 12 or 13 , characterized in that the second pulling device unit (32) comprises a spring bar (324) with a second deflection element (325) and is mounted on the second door element (112) in such a way that the spring bar (324) with the second deflection element (325) of the hinge axis ( x) faces the folding door (11) and the second retaining element (321) faces away from the hinge axis (x), the first retaining element (311) being connected via the tension spring (312) to the tension cable (33), which is connected via the first Deflection element (313) and the second deflection element (325) is guided to the second holding element (321). piece of furniture (1) after claim 12 , 13 or 14 , characterized in that at least one of the deflection elements (313, 325) is a deflection roller which is held by a deflection bearing (3130, 3250) which is held rotatably up or down by means of a pivot bearing (3131, 3251) and/or that the first holding element (311) or the second holding element (312) is held by a holding carriage (322) which can be displaced and locked along a holding rail (323).

Images