Sliding door

Abstract

A sliding door (1) can be installed between two wall elements (3.1, 3.2) with door openings (5) on a building wall. The sliding door includes a door leaf support frame (8) which is guided on a straight guide (6.1) arranged above the door openings (5) and is horizontally movable. At least one door leaf (15.1, 15.2) is attached to the door leaf support frame (8) by means of a link (16) forming a parallelogram guide system in such a way that the distance between the door leaf (15.1, 15.2) and the door leaf support frame (8), measured perpendicular to the outer surface of the door element (15.1, 15.2), can vary from a narrow position to a wide position. In the open state of the sliding door (1), the door leaf (15.1, 15.2) is in the narrow position and can be retracted between the two wall elements (3.1, 3.2). When closed, the door panels (15.1, 15.2) are positioned in the door opening (5) in a wide position, and the outer surfaces of the door panels (15.1, 15.2) are coplanar with the outer surfaces of the wall elements (3.1, 3.2) corresponding to the door panels (15.1, 15.2). A preload (30) presses the door panels (15.1, 15.2) against the door support frame (8) in a narrow position. A first preload magnet (32) generates preload.

Description

Technical Field

[0001] The present invention relates to a sliding door installed between two preferably plate-shaped wall elements on a building wall. Background Technology

[0002] The sliding door includes at least one door leaf mounted on a door leaf support frame that is displaceable in the closing and opening directions, and has approximately the size of a door opening present in a corresponding wall element. Here, the two wall elements form the surfaces of the building wall on opposite sides of the building wall. The door leaf, together with the door leaf support frame, can be displaced in the closing and opening directions. Furthermore, the distance between the door leaf and the door leaf support frame can be changed horizontally, perpendicular to the closing and opening directions, such that when the sliding door is closed, the outer surface of the door leaf is positioned coplanarly with the outer surface of the corresponding wall element. Typically, such a sliding door has two door leaves mounted on the same door leaf support frame, wherein, when the sliding door is closed, the outer surface of the second door leaf is also positioned coplanarly with the outer surface of the wall element corresponding to the second door leaf. This type of sliding door, particularly the door opening, is almost invisible when closed, which offers advantages in both aesthetics and security. The sliding door has a door frame that terminates the wall element on the inside. The door frame has an opening for accommodating the door leaf support frame with at least one door leaf.

[0003] A sliding door is known from EP3935249A1, comprising a door leaf support frame that is horizontally movable between two wall elements, with two door leaf support frames that are adjustable in opposite directions. The door leaf is supported such that the distance between the door leaf and the door leaf support frame can be varied. Thus, the door leaf can move from a narrow position to a wide position, wherein in the narrow position the door leaf rests against the door leaf support frame, allowing it to move between the wall elements, and in the wide position the sliding door is closed.

[0004] For movement, a mechanism is arranged in the end region of the closing movement to open the door leaf, thus moving the door leaf into a wide position. Here, the door leaf can move freely until the closing movement is about to end. Therefore, the door leaf is not tightly guided or held against the door leaf support frame. Thus, for example, an air pressure difference between opposite sides of the door opening may cause the door leaf to deviate from the door leaf support frame. If one of the door leaves deviates too far from the door leaf support frame during opening and closing, the door leaf may come into contact with the door frame. This may produce undesirable noise or scratch the door frame and / or the door leaf. Furthermore, when the door is open, a gap may form between the door leaf and the door frame, with varying widths along the height of the door. This significantly affects the aesthetics. Summary of the Invention

[0005] The purpose of this invention is to provide a sliding door that does not have the above-mentioned disadvantages.

[0006] This objective is achieved by a sliding door that can be installed between two wall elements with door openings on a building wall. The sliding door includes a door leaf support frame that is guided on a straight guide disposed above the door opening and is horizontally movable. At least one door leaf is attached to the door leaf support frame by means of a linkage forming a parallelogram guide system, such that the distance between the door leaf and the door leaf support frame, measured perpendicular to the outer surface of the door leaf, can be adjusted from a narrow position to a wide position. In the open state of the sliding door, the door leaf is in the narrow position and can retract between the two wall elements. In the closed state, the door leaf is positioned in the wide position within the door opening, and the outer surface of the door leaf can be positioned coplanarly with the outer surface of the wall element corresponding to the door leaf. A preload presses the door leaf into the door leaf support frame in the narrow position by generating a preload. A first preload magnet generates this preload.

[0007] In the narrow position, the door support frame, along with the door leaf, retracts into the wall, that is, between the two wall elements. In the wide position, the door is closed. That is, the door leaf closes the door opening. To ensure that the door leaf reliably rests against the door support frame when it moves between the wall elements, i.e., in the narrow position, the sliding door is equipped with a preload mechanism that presses the door leaf firmly against and holds it securely against the door support frame. For this purpose, the preload mechanism primarily applies force to the door leaf, thereby pressing the door leaf against the door support frame. In other words, the process of pressing the door leaf against the door support frame can also be described as applying a preload force to the door leaf, the purpose of which is to press the door leaf against the door support frame. The preload mechanism may also include, for example, a spring. A switchable magnet, a lifting magnet, or a linear motor can be used to perform the pressing or preload.

[0008] Preferably, each door leaf is pressed against the door leaf support frame by four preloads evenly distributed on the door leaf. Preferably, these four preloads are located in one corner area of ​​each door leaf. Thus, the entire door leaf is evenly and reliably pressed against the door leaf support frame. More advantageously, a design with six preloads is provided, arranged in two vertical columns and three horizontal rows.

[0009] In a feasible implementation of a sliding door, each of the two connecting rods forming a parallelogram guide system has one end fixed to one of two vertically arranged and horizontally spaced torsion bars. These torsion bars are rotatably supported on the door leaf load-bearing frame, wherein all the connecting rods are approximately equal in length and parallel to each other, and have a vertical axis door leaf support at the other end of the connecting rod. This door leaf support cooperates with a corresponding support on the door leaf, allowing the door leaf to be guided on the parallelogram guide system. In the parallelogram guide system, the pivoting movement of one of the two torsion bars increases or decreases the distance between the door leaf and the door leaf load-bearing frame.

[0010] The advantage of this implementation is that at least one door leaf is connected to the door leaf support frame not only in its upper region via a connecting rod, but also in its lower region. This achieves a stable position of the door leaf in all operating states, which cannot be guaranteed by the aforementioned prior art sliding door guide systems. Another advantage is that it avoids the need for guide grooves for the door leaf in the bottom region of the sliding door.

[0011] Pre-tensioning is generated by the magnetic attraction between a pre-tensioning magnet installed on the door leaf or door leaf support frame and another ferromagnetic part of the door leaf or door leaf support frame. Therefore, either the pre-tensioning magnet on the door leaf acts on the ferromagnetic part of the door leaf support frame, or vice versa.

[0012] In another feasible implementation of the sliding door, an electric motor for moving the door leaf support frame is arranged on the movable door leaf support frame. The advantage of this drive structure is that there is no need to install drive auxiliary components or cable junction boxes outside the door leaf support frame, so the installation location of the sliding door requires very little installation work.

[0013] In another feasible embodiment of the sliding door, the sliding door is equipped with a second door leaf. This second door leaf is arranged symmetrically with respect to the door leaf support frame and is attached to the door leaf support frame using the same components as the at least one door leaf, and is movable laterally to the outer surface of the wall element. With this type of sliding door, a passageway through the building wall is realized, wherein the door openings in the two wall elements can be closed by the door leaf, and in the closed state, the outer surface of the door leaf can be positioned coplanarly with the corresponding outer surfaces of the respective wall elements.

[0014] In another feasible implementation of the sliding door, the sliding door is equipped with a latch that, in the closed state, prevents the increase or decrease of the distance measured perpendicular to the outer surface of the wall element between the door leaf and the door leaf support frame from causing a reversal, thereby preventing the opening movement of the door leaf support frame. In this way, the latch of the sliding door can be easily implemented, preventing the sliding door from opening from the desired side of the building wall.

[0015] In another feasible embodiment of the sliding door, an intentional manual force is generated by manually pressing the outer surface of the opposing second door leaf, which disengages the locking element corresponding to the door leaf from its engagement with the rotation stop. In this embodiment of the sliding door, the latch can only be overcome by an electrically activated traction mechanism or by pressing it against one of the two door leaves. The latch is neither visible from either side of the building wall nor can it be unlocked by any operation.

[0016] In another feasible embodiment of the sliding door, the door leaf support frame is guided in its upper region on a straight guide portion arranged above the door opening in such a way that the upper region can only move parallel to the straight guide portion. Furthermore, in its lower region, the door leaf support frame is guided on a short guide portion arranged laterally above the door opening. The advantage of this embodiment of the sliding door is that in the area of ​​the door opening, the ground does not require any guide portions for the door leaf support frame or the door leaf itself, thus remaining completely flat and without grooves.

[0017] In another feasible embodiment of the sliding door, a first contact area is constructed on the door leaf support frame, and a second contact area is constructed on the door leaf, wherein the first contact area contacts the second contact area in a narrow position.

[0018] The two contact areas define the position of the door leaf in the narrow space when they come into contact. In other words, the first contact area acts as a stop against the corresponding second contact area, and vice versa. The contact areas are designed to support the preload force acting upon them. If multiple preloads press the door leaf against the door leaf support frame, preferably, each preload has a pair of first and second contact areas. Here, in the narrow space, the first and second contact areas together support the preload force of the preload. If a second door leaf is present, the same principle applies to the second door leaf. Preferably, the preload is constructed in or on the contact areas.

[0019] In one feasible implementation of a sliding door, the first contact area or the second contact area is made of a flexible material, preferably an elastomer.

[0020] Here, the flexible material forms the surface of the first contact area and / or the second contact area. The flexible material may be supported by a support structure that is stronger than itself.

[0021] The flexible material used in the contact areas makes these areas bendable, in other words, soft and / or elastic. The primary advantage of this is that even if the contact areas misalign, the door panel will not deform, or the deformation will be significantly smaller. For example, if four pairs of contact areas are not on the same plane, the four non-flexible contact areas will deform the door panel to ensure a snug fit at all contact areas. Due to the flexibility of the flexible material, the deformation of the door panel will be less. This is particularly advantageous when there are multiple, especially three or more, contact areas.

[0022] The advantage of bendable materials also lies in suppressing contact noise that may occur when the door reaches a narrow position. The collision between the first and second contact areas can generate strong vibrations, which are emitted as contact noise through the large surface of the door. Bendable materials suppress the impact that may occur when the first contact area strikes the second contact area, thereby reducing contact noise. Rubber or foam polymers are particularly suitable as bendable materials. They possess excellent damping properties.

[0023] In one feasible implementation of a sliding door, the first or second contact area is designed to be adjustable. This adjustable design allows for adjustment of the distance between the door leaf and the wall element when in a narrow position. This enables the adjustment of a constant clearance. Particularly when the door is fully open, a uniform clearance between the door leaf and the wall or door frame element can be achieved. Furthermore, it prevents deformation of the door leaf when it contacts more than three points, such as four. Due to its adjustability, all contact areas can be positioned within a single plane, thus preventing door leaf deformation. Manufacturing tolerances of the door leaf or its supporting frame can be corrected in this way.

[0024] Preferably, the pre-tightened magnet is constructed at or in the first or second contact point, while the ferromagnetic portion is the other of the first or second contact points.

[0025] To enable the adjustable design of the first or second contact area, threads can be designed into the corresponding contact area, for example. Only one of the two contact areas needs to be adjustable. Here, the threads are preferably designed to prevent loosening, thus preventing unwanted misalignment. Alternatively, the contact area support can have multiple feasible contact areas, each corresponding to a different setting. By moving or twisting the contact area support, a suitable feasible contact area can be moved to a position where the suitable feasible contact area is the effective first or second contact area.

[0026] In one feasible implementation of a sliding door, pretensioning is further assisted by a pretensioner spring. The pretensioner spring pushes or pulls the door leaf towards the door leaf support frame. Preferably, the pretensioner spring has a flat or constant spring characteristic. When the door is closed, the pretensioner spring is additionally pretensioned as the door leaf is moved into the wide position. Because it is advantageous that the spring force increases only slightly, or preferably remains almost constant, the drive mechanism used to move the door leaf to the wide position is designed to substantially the same dimensions as without a pretensioner.

[0027] In a preferred embodiment, the second contact area on the door leaf may include a magnet, particularly a magnet fixed to the door leaf. Correspondingly, the first contact area on the door leaf support frame is formed on a ferromagnetic portion of the door leaf support frame, which is covered by a layer of flexible material. Here, the layer of flexible material is preferably chosen to be thin enough to ensure that the magnetic holding force is still sufficient to reliably hold the door leaf. For this purpose, the strength of the magnet and the ferromagnetism of the contact area can be coordinated in such a way that the door leaf can be pressed against the door leaf support frame with the required spring preload. The preload is selected such that the door leaf is reliably held during movement, and the closing mechanism can reliably move the door leaf from a narrow position to a wide position. Alternatively, the magnet may be fixed to the door leaf support frame, while the door leaf has a ferromagnetic contact area. Alternatively, the magnet may be located in the first contact area, while the second contact area may be designed to be ferromagnetic. Furthermore, flexible material may also be arranged at the magnet, such that the contact area opposite the magnet is designed to be substantially only ferromagnetic. In this case, no further modifications to the ferromagnetic side are required.

[0028] In one feasible implementation of a sliding door, the sliding door is equipped with a second door leaf that is symmetrically arranged with respect to a door leaf support frame and at least one door leaf, and one or more pretensioners press the second door leaf against the door leaf support frame.

[0029] Preferably, the door is designed such that the door leaves, designated as the first and second door leaves, move symmetrically relative to the door leaf support frame. The second door leaf may have substantially the same features as the first door leaf. Specifically, the second door leaf may have a second contact area, an elastomer, a spring, or a magnet.

[0030] Hereinafter, the first pretensioner can act between the first door leaf and the door leaf support frame, and the second pretensioner can act between the second door leaf and the door leaf support frame. Alternatively, the pretensioner can act directly between the first and second door leaves. This would halve the number of pretensioners.

[0031] In one feasible implementation of a sliding door, the pretensioner is designed to be bistable, so that both the narrow and wide positions are maintained by the pretensioner.

[0032] Bistable means that the pretensioner exhibits the following effect: the door leaf not only has a first stable position, i.e., pressed against the door leaf support frame, which is the narrow position, but also a second stable state, i.e., the door leaf is preferably stably held in the wide position. Therefore, the door leaf remains in a stable position in both the closed and wide positions. In order to move from one stable position to another, energy must first be consumed to leave the current stable position, and then the door leaf can quickly spring into another stable position after passing through an unstable position.

[0033] In one feasible embodiment of a sliding door, the bistable preload includes a locking spring acting on a linkage. Here, the locking spring is preferably connected to the linkage in such a way that it is maximally preloaded at an unstable point located between the narrow and wide positions. Starting from this maximum preload at the unstable point, the locking spring can relax as the door moves towards the narrow position and as it moves towards the wide position. In both the narrow and wide positions, the preload of the locking spring is less than that at the unstable point. However, the spring is still sufficiently preloaded to stably hold the door in place.

[0034] In one feasible implementation, the bistable pretensioner has a first pretension magnet and a second pretension magnet, the first pretension magnet holding the door leaf in a narrow position and the second pretension magnet fixing the door leaf in a wide position.

[0035] Here, the first pre-tensioning magnet is arranged as described above and holds the door leaf in a narrow position on the door leaf support frame. For this purpose, a second pre-tensioning magnet is used to stably hold the door leaf in a wide position. Preferably, the second pre-tensioning magnet acts on or is disposed on a connecting rod. For this purpose, a third contact area is constructed on the door leaf support frame, and a fourth contact area is constructed on the connecting rod. In the wide position, the third contact area contacts the fourth contact area. Thus, the movement of the door leaf toward the wide position is defined. The second pre-tensioning magnet is preferably constructed on the third or fourth contact area. Thus, the wide position can be held by the second pre-tensioning magnet.

[0036] In one feasible embodiment of a sliding door, each of two links forming a parallelogram guide system has one end fixed to one of two vertically arranged and horizontally spaced torsion bars. The torsion bars are pivotally supported on the door leaf support frame about their longitudinal axis. All links are approximately equal in length and oriented parallel to each other. At their other end, the links have vertically pivotal door leaf support portions that mate with corresponding support portions on the door leaf, guiding the door leaf through the parallelogram guide system. In this system, the pivoting movement of one of the two torsion bars increases or decreases the distance between the door leaf and the door leaf support frame. A preload acts directly on the links.

[0037] In one feasible implementation, the door support frame can be horizontally moved by an electric motor. This allows the door support frame to be opened and closed, for example, under sensor control. Thus, even someone who cannot operate the sliding door with their hands free can use it. Furthermore, the electric motor ensures that the sliding door does not move too quickly, thereby preventing it from hitting the end stop too rapidly.

[0038] In one feasible implementation, the distance between the door leaf and the door leaf support frame, measured perpendicular to the outer surface of the door leaf, can be changed from a narrow position to a wide position by means of an actuator.

[0039] The actuator causes the door leaf to move from the narrow position to the wide position once the door leaf support frame has essentially reached the closed position. Thus, the actuator can include, for example, a spring that can be preloaded when the sliding door closes, particularly when the door leaf moves from the wide position to the narrow position. For this purpose, the door can be closed manually, for example, by first moving the door leaf from the wide position to the narrow position, and then laterally pushing the door leaf against the door leaf support frame. The energy stored in the spring can then move the door leaf back to the wide position.

[0040] In one feasible implementation, the actuator has an independent motor that moves the door leaf from the narrow position to the wide position. The advantage of this motor is that the door leaf can only move from the narrow position to the wide position after the door leaf support frame has reached the narrow position. This allows for very precise monitoring of the closing process, especially the process of pressing the seal against the door frame.

[0041] In one feasible implementation, the horizontal displacement of the door leaf support frame along the straight guide is converted into a change in distance by a mechanism that acts as an actuator. Here, this mechanism can be used to convert the horizontal displacement of the door leaf support frame along the straight guide into the movement of the door leaf from a narrow position to a wide position.

[0042] For example, such a mechanism may include a control slot. A sliding bolt on the linkage can engage with the control slot at least within the displacement range of the door leaf support frame, which is the final section of the sliding door's closing movement, at which point the sliding door is preferably almost completely closed. The engagement of the sliding bolt with the control slot actuates the control lever as the door leaf support frame moves within this final section of the closing movement. This movement of the linkage can be used to move the door leaf from a narrow position to a wide position.

[0043] The term "end region of closing movement" refers to the final part of the closing movement of the door leaf support frame, which begins approximately 10 to 20 millimeters before the final position of the door leaf support frame in the closed state of the sliding door and ends in the final position. Attached Figure Description

[0044] The following describes an embodiment of the sliding door according to the present invention with reference to the accompanying drawings.

[0045] in:

[0046] Figure 1A An exterior view of a sliding door installed between two wall elements located at a door opening is shown, with the sliding door in the open position, and a schematic horizontal sectional view of the sliding door structure is also shown.

[0047] Figure 1B Showing according to Figure 1A An external view of the installed sliding door in the closed position, and a schematic horizontal sectional view showing the structure of the sliding door.

[0048] Figure 2 Showing according to Figure 1B A horizontally movable portion of a sliding door in its closed state, excluding wall elements, and a horizontal cross-sectional view showing the movable portion.

[0049] Figure 3 Shown in relation to Figure 1 to Figure 2 A cross-sectional view of a sliding door similar to a center sliding door, using an alternative pretensioner supplemented by a pretension spring.

[0050] Figure 4A The width is shown in Figure 1 to 1. Figure 2 The cross-sectional view shown is similar to that of a sliding door, but with an alternative pretensioner supplemented by a locking spring.

[0051] Figure 4B Shown in narrow position, similar to Figure 1 to Figure 2 The cross-sectional view shown is similar to that of a sliding door, but with an alternative pretensioner supplemented by a locking spring.

[0052] Figure 5A The width is shown in Figure 1 to 1. Figure 2 The cross-sectional view shown is similar to that of a sliding door, but employs an alternative bistable pretensioner implemented with a magnetic structure.

[0053] Figure 5B Shown in narrow position, similar to Figure 1 to Figure 2 The cross-sectional view shown is similar to that of a sliding door, but employs an alternative bistable pretensioner implemented with a magnetic structure. Detailed Implementation

[0054] Figure 1AA sliding door 1 is shown in view of the front wall element of the two wall elements 3.1 and 3.2, with the sliding door in its open state installed between the wall elements. Wall elements 3.1 and 3.2 are supported on a floor 4, which has an embedded base plate 4.1 in the area of ​​the sliding door 1. A door opening 5 is provided in each of the two wall elements 3.1 and 3.2. A door frame 6 installed between the two wall elements 3.1 and 3.2 is not visible and is therefore indicated by dashed lines. This door frame includes an upper linear guide 6.1 arranged above the door opening, a door frame post 6.2 including a door closing edge 6.4, and a door frame post 6.3 away from the door closing edge 6.4, wherein the door frame post carries the upper linear guide 6.1. On the linear guide, preferably equipped with guide rollers 7, the upper part of the door leaf carrying frame 8 is displaceably guided along the linear guide 6.1 in the closing or opening direction of the sliding door 1. In the lower region of the door leaf support frame 8, the door leaf support frame is provided with a guide rail 10 arranged in the closing or opening direction. This guide rail, together with the guide shoe 11 fixed to the base plate 4.1 next to the door opening, forms the lower linear guide section. The door leaf support frame 8, which has sufficient rigidity, can only move in the closing or opening direction due to the cooperation of the two linear guide sections. The electric motor drive device for closing and opening the sliding door is combined with... Figure 2 introduce.

[0055] Door panels 15.1 and 15.2 are installed on both sides of the door panel support frame 8 in the following manner: the distance between door panels 15.1 and 15.2 and the door panel support frame 8, measured perpendicular to the outer surfaces of wall elements 3.1 and 3.2, is changed such that when the sliding door 1 is open, door panels 15.1 and 15.2 can be positioned between the two wall elements 3.1 and 3.2; and when the sliding door is closed, door panels 15.1 and 15.2 can be positioned in the door openings 5 ​​of wall elements 3.1 and 3.2, with one door panel corresponding to each door opening. In the closed state, the outer surfaces of door panels 15.1 and 15.2 are coplanarly positioned with the outer surface of each corresponding wall element. The horizontal section AA through the sliding door 1 in its open state schematically illustrates how, in the open state, the two door panels 15.1 and 15.2 are positioned between the two wall elements 3.1 and 3.2, wherein the door panels are supported by means of a link 16 forming a parallelogram guide system on a torsion bar 18 vertically arranged in the door panel support frame 8 and pivotable about its vertical axis, such that changes in the distance between the door panels and the door panel support frame 8 can be performed in the following manner. The following will combine... Figure 2 and Figure 3The mechanism for driving the linkage 16 to change the distance between the door leaf 15 and the door leaf support frame 8 is explained in more detail. In Figure 1, the distance between the door leaf 15.1 or 15.2 and the door leaf support frame 8 is in a narrower position. This narrow position allows the sliding door 1 to retract between the two wall elements 3.1 and 3.2.

[0056] Figure 1B Its corresponding horizontal section BB is shown in the closed state of the sliding door. Figure 1A The sliding door 1 is shown in its open state. In the closed state, the door leaf support frame 8 and the door leaves 15.1 and 15.2 supported thereon are moved to the area of ​​the door opening 5. In the moved end region, the distance between the door leaf 15 and the door leaf support frame 8 is increased by the pivot link 16, so that the door leaf extends into the recesses in the wall elements 3.1 and 3.2 that form the door opening 5, wherein the outer surfaces of the door leaves 15.1 and 15.2 are positioned flush with the outer surfaces 3.1.1 and 3.2.1 of their respective wall elements 3.1 and 3.2. The distance between the door leaf 15.1 or 15.2 and the door leaf support frame 8 corresponds to the width position. In order to minimize the gap between the door leaves 15.1, 15.2 and the recesses in the wall elements that form the door opening 5 in the closed state of the sliding door 1, it is necessary for the door leaf 15 to perform a movement perpendicular to the wall elements 3.1, 3.2 as its distance from the door leaf support frame 8 increases.

[0057] Figure 1A and Figure 1B The pretensioner is not shown and therefore represents prior art.

[0058] Figure 2 The enlarged view primarily shows the horizontally movable portion of the sliding door 1 in its closed state, with wall elements omitted. Figure 2 It also includes a horizontal section CC passing through the aforementioned movable portion. Reference numeral 6 indicates a door frame, which includes an upper horizontal straight guide section 6.1 and two vertical door frame posts 6.2 and 6.3 (6.3 is not visible here). The door leaf support frame 8, as already mentioned, is horizontally displaced and guided on the straight guide section. The door leaf support frame 8, including an upper crossbeam 8.1, a lower crossbeam 8.2, and two vertical supports 8.3, also has a guide rail 10 arranged parallel to the displacement direction on its lower crossbeam 8.2. This guide rail cooperates with guide shoes 11 arranged laterally in the bottom area of ​​the sliding door opening to further guide and stabilize the door leaf support frame 8.

[0059] To generate the closing and opening movements of the door leaf support frame 8, the door leaf support frame is equipped with a traction mechanism drive device 20, which is preferably in the form of a belt drive device. The traction mechanism drive device 20 includes an electric drive motor 21, which is fixed to the end of the upper crossbeam 8.1 of the door leaf support frame 8 away from the closing edge 6.2.1 of the door leaf, and carries a drive pulley 22. In addition, the traction mechanism drive device 20 also includes two deflection pulleys 23 fixed to the ends of the upper crossbeam near the closing edge 6.4 of the door leaf, and a traction mechanism 24, preferably designed as a belt and rotating around the drive pulley and the two deflection pulleys. In the appropriate position, the traction mechanism 24 is fixed to a retaining element fixedly mounted on the door frame, so that when the drive pulley 22 rotates, the door leaf support frame 8 and the door leaf 15 supported on it generate a horizontal closing or opening movement.

[0060] Four torsion bars 18 extend between the upper crossbeam 8.1 and the lower crossbeam 8.2 of the door leaf support frame 8, and these torsion bars are pivotally supported in the crossbeams about their longitudinal axis. Two of the four torsion bars correspond to the two door leaves 15.1 and 15.2, with an upper and lower connecting rod 16 fixed at one end to each torsion bar 18. The other end of the connecting rod 16 is provided with a vertical door leaf support portion 17, through which the connecting rod 16 supports and guides the door leaves 15.1 and 15.2. The upper and lower connecting rods 16 of each pair of torsion bars are connected to the corresponding door leaves 15.1 and 15.2, respectively, thereby guiding the door leaves on a parallelogram guiding system, so that even if the distance between the door leaf and the door leaf support frame 8 changes, the door leaf remains parallel to the door leaf support frame.

[0061] In order to change the distance between door leaves 15.1, 15.2 and the door leaf support frame 8, that is, to generate the pivoting motion of torsion bar 18, and further the pivoting motion of connecting rod 16, a transmission mechanism is provided in or on the upper crossbeam 8.1 of the door leaf support frame 8. Figure 2(Not visible in the image), this transmission mechanism causes a corresponding torsion bar 18 to pivot for each door leaf 15.1, 15.2. Here, the parallelogram guide system ensures that the four links of the same door leaf pivot synchronously. When the transmission mechanism increases the aforementioned distance, in the end region of the door leaf support frame 8 during the door closing movement, the control body, guided in the upper beam 8.1 but displaceable relative to the upper beam in the direction of movement of the door leaf support frame, is displaced such that the control body stop 38 connected to the control body abuts against a fixed stop, such as the closing edge 6.3 of the door frame post. Conversely, when the transmission mechanism decreases the distance, the control body is stopped or moved backward with a defined holding force at the start of the door opening movement until the distance between the door leaves 15.1 and 15.2 and the door leaf support frame is reduced to such that the door leaves can enter between the wall elements 3.1 and 3.2 shown in FIG. 1.

[0062] Pre-tightening magnets 32 are integrated into door panels 15.1 and 15.2 as pre-tighteners 30. Preferably, four pre-tightening magnets are arranged on each door panel 15.1 and / or 15.2, respectively, in the corner areas of door panels 15.1 and 15.2. Furthermore, the arrangement of the pre-tightening magnets 32 ensures that, in narrow positions, they remain attached to a preferably ferromagnetic adhesion region 33. This adhesion region 33 is the surface of a ferromagnetic vertical support 8.3. The vertical support 8.3 is preferably made of steel. Figure 2 As shown, in the wide position, the pre-tightening magnets do not exert significant force on the door leaf 15.1 or 15.2. This is because the distance between each pre-tightening magnet 32 ​​and the vertical carrier 8.3 is too large. The attachment area 33 also constitutes the contact area 35.1, on which the door leaf 15.1 or 15.2 contacts the door leaf support frame 8.

[0063] In the narrow position, the pre-tightening magnet contacts the attachment area 33, thereby contacting the first contact area 35.1. This generates a holding force sufficient to reliably hold door panels 15.1 and 15.2 onto the door panel support frame 8. This ensures that door panels 15.1 and 15.2 are reliably pressed against the door panel support frame 8. Preferably, the pre-tightening magnet 32 ​​or the attachment area 33, i.e., the contact area 35.1 between the attachment area 33 and the pre-tightening magnet 32, is coated with an elastomer, particularly a layer of elastomer. This has the advantage of preventing contact noise when the narrow position is reached. Furthermore, the elastomer can compensate for slight misalignment of the four pre-tightening magnets 32 or the attachment areas 33.

[0064] Figure 3 A portion of sliding door 1 is shown. Figure 2 In the diagram shown, this part is located Figure 2 In the CC section. Figure 3An alternative embodiment of the pretensioner is shown. Here, door panels 15.1 and 15.2 are connected to the pretensioner spring 31 in addition to the pretensioner magnet 32. The pretensioner spring 31 is designed so that door panels 15.1 and 15.2 remain close to each other even when in a narrow position. Figure 3 The wide position is shown. In the narrow position, the second contact area 35.2 of door leaf 15.1 or 15.2 contacts the first contact area 35.1 of door leaf support frame 8. Link 16 guides door leaves 15.1 and 15.2 on door leaf support frame 8.

[0065] Preferably, the pretensioner springs 31 and contact areas 35.1 and 35.2 are attached close to each other. Furthermore, preferably, the four pretensioner springs 31 and the four pairs of contact areas 35.1 and 35.2 are positioned close to each other near the four corner areas of the door, such as... Figure 2 The four pre-tightened magnets are shown in the diagram. Here, the two second contact areas 35.2 are formed by attaching an elastomer to the door panels 15.1 and 15.2. Alternatively, the elastomer can also be attached to the door panel support frame 8.

[0066] Figure 4A and Figure 4B A portion of sliding door 1 is shown. Figure 2 In the view shown, this part is located in section CC. Figure 4A and Figure 4B An alternative embodiment of the pretensioner 30 is shown. Here, the link 16 is slightly modified. A support point 36 for the locking spring 34 is added to the link 16. The other end of the locking spring 34 is fixed to the door leaf support frame 8. The support point 36 is designed on the link 16 such that there is an unstable position between the wide and narrow positions. Figure 4A The first stable position is shown. The pull of the locking spring 34 on the linkage 16 compresses the door leaf 15.2 further away from the door leaf support frame 8 in the width direction. This movement is restricted by the door frame (not shown). Figure 4B The second stable position is shown. The pull of the locking spring 34 on the linkage 16 presses the door leaf 15.2 against the door leaf support frame 8 at the contact areas 35.1 and 35.2 of the pair of 35s. This movement is restricted by the contact areas 35.1 and 35.2 of the pair of 35s. Therefore, this design has two stable positions and can be called a bistable design. To move from one stable position to the other, the locking spring 34 must first be further preloaded to overcome the unstable position. Thus, the door leaf 15.1 can be reliably and stably held in either the narrow or wide position. In the narrow position, the preloaded magnet 32 ​​presses the door leaf 15.1 against the door leaf support frame 8 by attracting the ferromagnetic material of the door leaf 15.1. Similarly, the contact areas 35.1 or 35.2 are preferably made of or coated with an elastomer. Figure 4A and Figure 4BOnly one door leaf 15.1 is shown. However, the same technique applies to a second door leaf on the same load-bearing frame.

[0067] Figure 5A and Figure 5B A portion of sliding door 1 is shown. Figure 2 In the diagram shown, this part is located Figure 2 In the CC section. Figure 5A and Figure 5B Another alternative embodiment of the pretensioner 30 is shown, which employs a bistable design. Figure 5A and Figure 5B Unlike other structures, the bistable structure here is based on the use of a pre-tightened magnet. For example... Figure 2 As shown, the pre-tightening magnet 32 ​​and the attachment area 33 constitute a pre-tightening element. Figure 5B In the narrow section shown, the pre-tightened magnet 32, fixed to the door leaf support frame 8, contacts the attachment area 33 of the door leaf 15.1. It should be noted that this structure... Figure 2 The structures shown are reversed. In the narrow position, the first contact area 35.1 contacts the second contact area 35.2.

[0068] exist Figure 5A In the shown wide position, the second preload magnet 32b is fixed to the door leaf support frame 8. The fourth contact area 37.2 is constructed on the connecting rod 16. The third contact area 37.1 is directly constructed on the second preload magnet 32b. Alternatively, as an alternative to the illustrated embodiment, the second preload magnet can be arranged on the connecting rod and act on the third contact area, which is designed to be ferromagnetic at this time.

[0069] Figure 5A The first stable position is shown. Figure 5B The second stable position is shown. Preferably, the preload magnet 32 ​​and the second preload magnet 32b are displaceably supported so that the position of the stable position can be adjusted.

[0070] If one of the rooms connected by the sliding door does not have high aesthetic requirements, the sliding door according to the present invention can also be designed with only a single door leaf 15.1 or 15.2.

[0071] In principle, such as Figure 2 The sliding door shown can be used Figure 3 , Figure 4A , Figure 4B , Figure 5A and Figure 5B All the concepts shown.

Claims

1. A sliding door (1) capable of being installed between two wall elements (3.1, 3.2) having door openings (5) in a building wall, wherein, The sliding door includes a door leaf support frame (8), which is guided on a straight guide (6.1) arranged above the door opening (5) and is horizontally movable, wherein at least one door leaf (15.1, 15.2) is attached to the door leaf support frame (8) by a link (16) forming a parallelogram guide system in such a way that the distance between the door leaf (15.1, 15.2) and the door leaf support frame (8) measured perpendicular to the outer surface of the door element (15.1, 15.2) can change from a narrow position to a wide position. In the open state of the sliding door (1), the door leaf (15.1, 15.2) is in the narrow position and can retract between the two wall elements (3.1, 3.2), and The door panels (15.1, 15.2) can be positioned in the door opening (5) in a wide position when closed, and the outer surface of the door panels (15.1, 15.2) can be positioned coplanar with the outer surface of the wall element (3.1, 3.2) corresponding to the door panels (15.1, 15.2). The pretensioner (30) presses the door panels (15.1, 15.2) in the narrow position against the door panel support frame (8) by generating pretension. The first pretensioning magnet (32) generates pretension.

2. The sliding door according to claim 1, characterized in that, A first contact area (35.1) is constructed on the door leaf support frame, and a second contact area (35.2) is constructed on the door leaf, wherein the first contact area (35.1) contacts the second contact area (35.2) at a narrow position.

3. The sliding door (1) according to claim 2, characterized in that, The first contact area (35.1) or the second contact area (35.2) is made of a flexible material, preferably an elastomer.

4. The sliding door (1) according to claim 2, characterized in that, The first contact area (35.1) or the second contact area (35.2) is designed in an adjustable manner so that the distance can be adjusted.

5. The sliding door (1) according to any one of claims 1 to 4, characterized in that, Pre-tensioning is assisted by a pre-tensioner spring (31).

6. The sliding door according to any one of claims 1 to 5, characterized in that, The sliding door (1) is provided with a second door leaf (15.2), which is symmetrically arranged with respect to the door leaf support frame and the at least one door leaf (15.1), and one or more pretensioners press the door leaf (15.1) and the second door leaf (15.2) onto the door leaf support frame (8).

7. The sliding door according to any one of claims 1 to 6, characterized in that, The pretensioner is designed to be bistable, so that the narrow position and the wide position can be maintained by means of the pretensioner.

8. The sliding door according to claim 7, characterized in that, The bistable preload has a locking spring (34) acting on the connecting rod (16).

9. The sliding door according to claim 8, characterized in that, The bistable pretensioner has a first pretension magnet (32) and a second pretension magnet (32b), the first pretension magnet holding the door panels (15.1, 15.2) in a narrow position and the second pretension magnet holding the door panels (15.1, 15.2) in a wide position.

10. The sliding door according to any one of claims 1 to 10, characterized in that, Each pair of connecting rods (16) forming a parallelogram guiding system is fixed at one end to one of two vertically arranged and horizontally spaced torsion bars (18), which are supported on the door leaf support frame (8) in a manner that allows them to pivot about their longitudinal axis. All connecting rods (16) are approximately equal in length and parallel to each other, and have a vertical door leaf support portion (17) at their other end. The door leaf support portion cooperates with the corresponding support portion on the door leaf (15.1, 15.2) so that the door leaf is guided on the parallelogram guiding system. The pivoting movement of one of the two torsion bars (18) increases or decreases the distance between the door leaf (15.1, 15.2) and the door leaf support frame (8), and the pretensioner acts directly on the connecting rod.

11. The sliding door according to any one of claims 1 to 10, characterized in that, The door leaf support frame (8) can be horizontally moved by means of an electric motor (21).

12. The sliding door according to any one of claims 1 to 11, characterized in that, The distance between the door leaf (15.1, 15.2) and the door leaf support frame (8), measured perpendicular to the outer surface of the door leaf (15.1, 15.2), can be changed from a narrow position to a wide position by means of an actuator.

13. The sliding door according to claim 12, characterized in that, The actuator has an independent motor.

14. The sliding door according to claim 12, characterized in that, The horizontal displacement of the door leaf support frame (8) along the straight guide (6.1) can be converted into a change in distance by means of a mechanism that acts as an actuator.

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