Holding mechanism for a door

Abstract

The invention relates to a holding mechanism (10) for immobilizing a door (20), which opens on both sides, relative to a doorframe (30) in the left-hand open position or in the right-hand open position of the door, comprising a door-mounted element (1.1) to be arranged on the door (20) and a frame-mounted element (2.1) to be arranged on the doorframe (30). The two mounted elements (1.1, 2.1) are telescopically connected together via a telescopic device (6). The invention additionally relates to a door (20) and a doorframe (30) comprising a corresponding holding mechanism (10).

Description

[0001] Door locking device

[0002] The invention relates to a locking device for locking a door hinged on both sides relative to a door frame in its left open position and its right open position, with a door mounting element for arrangement on the door and a frame mounting element for arrangement on the door frame.

[0003] In various areas of technology, it is necessary to lock doors—which includes not only doors in the true sense of the word, but also flaps, hatches, lids, or windows—in their open position relative to a door frame and thus secure them in this position so that the doors cannot slam shut again or be closed accidentally. Typically, locking devices are used for this purpose, which can lock or fix the doors in the open position relative to the door frame.

[0004] In the simplest case, the door can be wedged open, for example, with a door wedge. While this type of locking mechanism is very simple and inexpensive to implement, it requires only a small gap between the door and the floor for the door wedge to engage. Furthermore, the door wedge can easily slip or get lost, making this type of door locking mechanism insufficiently reliable.

[0005] One advantage of such a simple wedge solution, however, is that a door wedge can also be used to secure doors that are hinged on both sides, i.e. doors that can be opened not just around a single pivot axis, but optionally around two, namely a right and a left pivot axes. In order to open a door both to the left and to the right, simple hinges cannot be used; instead, so-called hinge locks are often used in practice. These hinge locks combine the functions of locks and hinges and thus allow the door to be opened to both the left and the right. The precise design and function of such hinge locks is described in more detail in DE 10 2015 117 505 B3, for example.

[0006] As an alternative to a door wedge, it is also possible to provide a double-hinged door with a door mounting element and the door frame with a frame mounting element. The two mounting elements are connected to one another via a locking lever. The frame mounting element and the door mounting element each have two locking contours in the manner of guide rails for locking the locking lever. These locking contours are arranged such that a double-hinged door can be locked either in its right-hand open position or its left-hand open position. Such a device is described in the German patent application with the file number DE 10 2021 115 490.1, which had not yet been published at the time of this application.

[0007] Although this device can also reliably secure double-hinged doors, this solution is quite complex in terms of construction. Based on this, the invention addresses the problem of providing a locking device for securing a double-hinged door that is characterized by a simpler design.

[0008] This task is solved in a locking device of the type mentioned above in that the two mounting elements are telescopically connected to one another via a telescopic device.

[0009] The telescopic device allows the two mounting elements to be connected to each other, but also to be moved relative to each other. When the door is open, the telescopic device can be extended, and the two mounting elements can be held at a certain distance from each other by the telescopic device, thus securing the door in its open position. The telescopic device can be arranged and configured in such a way that the door can be reliably secured in both its left and right open positions.

[0010] When the door is open, the telescopic device may have reached its maximum length, preventing the door from opening any further. The telescopic device can thus prevent the door from opening beyond a certain point. For example, the telescopic device can be designed so that the door can be opened by a maximum of 90 degrees around both the left and right pivot axes. In this respect, the telescopic device can also function as a door opening limiter. When the door is fully opened or the telescopic device is fully extended, the two mounting elements can be at their maximum possible distance from each other.

[0011] To lock the telescopic device in its extended position, it has proven advantageous to provide a locking device that can be used to lock the telescopic device accordingly. The locking device can be used to secure the telescopic device in its extended position, preventing it from being retracted and the door from being closed. To retract the telescopic device and close the door again, the locking device must first be unlocked.

[0012] According to an advantageous development of the invention, it is proposed that the telescopic device has at least two telescopic stages. It can be provided that the two telescopic stages can each be locked independently of one another via a locking device. Thanks to the two telescopic stages, the telescopic device can be extended further overall than would be the case, for example, with a telescopic device with only one telescopic stage. Especially for a door hinged on both sides, it is often necessary for the telescopic device to be able to be extended far in order to secure the door in both the left and right open positions. Therefore, a single telescopic stage is often not sufficient. Furthermore, a telescopic device with several telescopic stages requires less installation space in the retracted position than a telescopic device of the same length with fewer telescopic stages.A telescopic device with at least two telescopic stages has also proven to be advantageous in terms of space requirements.

[0013] It can be provided that one locking device is provided for each telescopic stage. This design allows for a high degree of flexibility, since the various telescopic stages can each be secured independently of one another using a locking device. In order to retract the telescopic device, it may then be necessary to unlock all locking devices. If two telescopic stages are provided, two locking devices can be provided accordingly. Each telescopic stage can consist of two telescopic elements, with one telescopic element being able to be assigned to two telescopic stages. With two telescopic stages, three telescopic elements can be provided accordingly, with the central telescopic element being able to be part of both the first and the second telescopic stage.

[0014] According to an advantageous development of the invention, the telescopic device comprises a first telescopic element which can be connected to the door via the door mounting element, and a second telescopic element which can be connected to the door frame via the frame mounting element, wherein the two telescopic elements are guided into one another. When opening and closing the door, the telescopic elements can move relative to one another or can be extended when opening the door and pushed together when closing it. The two telescopic elements can thus form a telescopic step. The first, door-side telescopic element can be guided in the second, frame-side telescopic element.

[0015] To realize two telescopic stages, it has proven advantageous if an intermediate telescopic element is provided between the first telescopic element and the second telescopic element, wherein the first telescopic element is guided in the intermediate telescopic element and the intermediate telescopic element is guided in the second telescopic element. The first telescopic stage can therefore be formed by the first telescopic element and the intermediate telescopic element, and the second telescopic stage can be formed by the intermediate telescopic element and the second telescopic element. This design allows the telescopic device to be extended twice, namely by a linear movement of the first telescopic element relative to the intermediate telescopic element and by a linear movement of the intermediate telescopic element relative to the second telescopic element. To realize further telescopic stages, a corresponding number of intermediate telescopic elements can be provided, which can then be guided one inside the other.The first telescopic element, the intermediate telescopic element, and the second telescopic element are each referred to as telescopic elements. The terms used are intended only to more clearly distinguish the telescopic elements from one another. For example, if only two telescopic elements are provided, the telescopic element otherwise referred to as the intermediate telescopic element can function as the first or second telescopic element.

[0016] With regard to the locking devices, it has proven advantageous if the first telescopic element can be locked to the intermediate telescopic element via a first locking device, and the intermediate telescopic element can be locked to the second telescopic element via a second locking device. The locking devices thus enable the telescopic elements to be locked independently of one another. The use of the terms "first" and "second" should not be understood to imply that two different or at least two locking devices must necessarily be present. Both the locking device referred to as the first locking device and the locking device referred to as the second locking device can also be provided as the only locking devices.The terms “first” and “second” are intended merely to make the locking devices more clearly distinguishable for the purposes of the description below.

[0017] According to an advantageous development of the invention, it is proposed that the first telescopic element, together with the intermediate telescopic element, be guided in the second telescopic element. The first telescopic element can thus be moved together with the intermediate telescopic element relative to the second telescopic element, and the first telescopic element can also be moved relative to the intermediate telescopic element. In this way, the telescopic device can be doubly telescopic and thus extendable twice.

[0018] With regard to the design of the telescopic elements, it has proven advantageous if they are designed as linear guides. This design only allows a linear movement of the telescopic elements relative to one another and prevents any tilting or pivoting movement of the telescopic elements relative to one another. To implement a linear guide, for example, a telescopic element can be designed such that it laterally encompasses the telescopic element guided in it, thereby preventing any tilting or pivoting movement. It can be provided that the intermediate telescopic element and the second telescopic element are each designed as a guide rail and have a substantially C-shaped cross-sectional profile. The telescopic elements, in particular the intermediate telescopic element and the second telescopic element, can also provide guidance in the vertical direction in addition to a lateral guide.The telescopic elements can therefore function as axial guides.

[0019] Furthermore, it has proven advantageous if relative movement of the telescopic elements is limited by stops. The stops can prevent the telescopic elements from slipping apart, for example when the door is opened very wide. The stops can therefore also be used to define the maximum door opening angle. The intermediate telescopic element can have a stop to limit movement of the first telescopic element relative to the intermediate element. The first telescopic element can therefore be guided captively in the intermediate telescopic element. When the maximum extension length of the telescopic device or the first telescopic stage is reached, the first telescopic element can rest against the stop of the intermediate telescopic element. The stop can be designed as a unwinding.The stop can also prevent the locking element of the first locking device from slipping over the locking recess when the first telescopic stage is quickly pulled out.

[0020] The locking element of the second locking device, which is described in more detail below, can also function as a stop and ensure that the telescopic elements of the second telescopic stage cannot slip apart.

[0021] With regard to the two locking devices, it has proven advantageous to design them as two separate units. This design allows the two locking devices to be locked and unlocked independently of each other, which increases the overall variability of the telescopic device.

[0022] With regard to the first locking device, it has proven advantageous if it can be automatically locked upon movement of the telescopic elements of the first telescopic stage. It is therefore not necessary to actively lock the first locking device; instead, it can lock automatically when the two telescopic elements have reached their end position due to the movement of the door in its open position. Due to the locking, the two telescopic elements can then no longer be moved relative to each other. The locking device can be automatically locked upon movement of the first telescopic element relative to the intermediate telescopic element.

[0023] With regard to the first locking device, it has further proven advantageous if it can be unlocked manually. The door can be reliably held in the open position by the first locking device; however, if the door is to be closed again, manual intervention may be required to unlock the locking device. The first locking device can thus be manually moved from the locked position to the unlocked position, in which the two telescopic elements, in particular the first telescopic element and the intermediate telescopic element, can then be moved relative to one another again to close the door again.

[0024] With regard to the arrangement of the first locking device, it has proven advantageous if it is arranged on the underside of the first telescopic element. This arrangement allows the locking device to be easily reached by hand when the door is open and can therefore be unlocked by hand in order to close the door again. Furthermore, the first locking device can also be arranged on the upper side of the first telescopic element. This is particularly advantageous if the locking device is arranged in the lower area of ​​the door. The first locking device can therefore be arranged such that it points towards the middle of the door or towards the opposite frame edge. This ensures that the first locking device is easily accessible by hand.

[0025] With regard to the arrangement of the first telescopic element, it has proven advantageous if it can be pivotally connected to the inside of the door via the door mounting element. The door mounting element can be connected, in particular screwed, to the inside of the door, and the first telescopic element can be pivotally connected to the door mounting element at its end, wherein the pivot axis can extend in the vertical direction.

[0026] In this context, it has also proven advantageous if the first locking device is arranged at the end of the first telescopic element opposite the door mounting element. This end-side arrangement of the first locking device allows the first telescopic element to be moved as far as possible relative to the intermediate telescopic element, thus extending the telescopic device to a great extent.

[0027] With regard to the first locking device, it has proven advantageous if it is designed as a snap-lock. A snap-lock ensures reliable locking of two telescopic elements, preventing them from moving relative to each other.

[0028] With regard to the structural design of the locking device, it is proposed that it have a locking element that can be moved back and forth between a locking and an unlocking position. In the locking position, the first telescopic element can be locked relative to the intermediate telescopic element and thus fixed in place by the locking element. Movement of the first telescopic element relative to the intermediate telescopic element is then reliably prevented by the locking element.

[0029] According to an advantageous development of the locking device, the locking element is pre-tensioned into the locking position by a spring. This design ensures automatic locking when the end position is reached, i.e., when the door is fully open. Therefore, no manual intervention is required to lock the first locking device.

[0030] According to a further advantageous embodiment, it is proposed that the intermediate locking element has a locking recess into which the locking element can automatically engage to lock the first telescopic element to the intermediate telescopic element. The locking element can thus ensure a positive connection between the first telescopic element and the intermediate telescopic element. To release the positive connection, the locking element must first be moved into the unlocked position against the force of the spring. Relative movement of the two telescopic elements is then possible again.

[0031] From a design perspective, it has proven advantageous if the locking element is designed as a push button. This push button design allows the first locking element to be easily moved by hand against the force of the spring and transferred into the unlocked position to enable relative movement of the two telescopic elements.

[0032] In this context, it has further proven advantageous if the locking element is guided in a guide. The guide can enable reliable movement of the locking element between the locked and unlocked positions, so that the locking element does not tilt. The guide can be designed as a linear guide and allow movement of the locking element in the vertical direction, and thus in particular perpendicular to the first telescopic element. The guide can be mounted on the underside of the first telescopic element and thus also come into contact with the intermediate telescopic element. The first telescopic element can have a U-shaped cross-section, wherein the open side can face the intermediate telescopic element.If the locking device is located at the top of the door, the open side can face downwards; if the locking device is located at the bottom of the door, the open side can face upwards. Furthermore, the first telescopic element can also be guided via the guide in the intermediate telescopic element.

[0033] With regard to the second locking device, it has proven advantageous if it can be locked automatically when the second telescopic stage is extended. This allows the telescopic elements of the second telescopic stage, in particular the intermediate telescopic element and the second telescopic element, to be reliably locked so that they can no longer be moved. The automatic locking mechanism eliminates the need for manual intervention; instead, the second locking device is automatically locked when the door moves into the open position. Once the door has reached the left or right open position, the second locking device can thus prevent relative movement, and the telescopic device can thus reliably hold the door in the open position.

[0034] With regard to the second locking device, it has further proven advantageous if it can be unlocked automatically. Thus, no manual intervention is required to unlock the second locking device. Rather, the locking device can be designed such that the second locking device can be unlocked via a kinematic coupling of the telescopic elements. In particular, the second locking device can be unlocked via the telescopic elements or at least one telescopic element of the first telescopic stage. To close the door, it may therefore be sufficient to manually unlock only the first locking device, since the relative movement of the telescopic elements, in particular of the first telescopic element and the intermediate telescopic element, thus enabled automatically also unlocks the second locking device.

[0035] From a design perspective, a locking element is provided for the second locking device that can be pivoted back and forth between a locking position and an unlocking position. The locking element can be pivoted back and forth along a horizontal pivot axis, in particular a pivot axis extending along the intermediate telescopic element. The locking element of the second locking device can be designed as a locking lever that can be pivoted back and forth about the horizontal axis at one end and whose opposite end can lock the telescopic elements of the second telescopic stage.

[0036] With regard to the arrangement of the second locking device, it has proven advantageous if it is arranged in the end region of the intermediate telescopic element assigned to the second telescopic element. The intermediate telescopic element can be arranged between the first and the second telescopic element, such that one end region can be assigned to the first telescopic element and one end region to the second telescopic element. The second locking device can be located opposite the locking recess arranged in the other end region of the intermediate telescopic element. By arranging the locking device in the end region, it can be achieved that the intermediate telescopic element, in the extended position, is coupled at one end to the first telescopic element and at the other end to the second telescopic element. The telescopic device can thus be extended as far as possible.To connect the locking element to the intermediate telescopic element, a bearing element can be provided. This can be arranged in the manner of an angle in the end region of the intermediate telescopic element, so that one leg of the angle is bent horizontally and the other leg is bent downwards and thus arranged vertically. The bearing element can then be connected to the intermediate telescopic element at the horizontal leg, for example via a screw connection, and the locking element can be pivotally connected to the intermediate telescopic element at the vertical leg.

[0037] To unlock the second locking device, it has proven advantageous if it can be unlocked via an unlocking element, wherein the unlocking element is arranged on a telescopic element of the first telescopic stage, in particular the first telescopic element. The unlocking element can be arranged at the end of the first telescopic element, in particular on the same side as the first locking device. Provision can be made for the unlocking element and the first locking device to be connected to the first telescopic element via a common fastening element, in particular a common screw.

[0038] According to an advantageous development of the invention, it is proposed that the unlocking element contact the locking element of the second locking device upon retraction of the first telescopic stage and can transfer the latter into the unlocking position. Upon movement of the first telescopic element relative to the intermediate telescopic element, the unlocking element can contact the locking element and transfer or pivot the latter into the unlocking position. The second locking device can thus be unlocked by a relative movement of the telescopic elements of the first telescopic stage, in particular of the first telescopic element relative to the intermediate telescopic element. Therefore, no manual intervention is required to unlock the second locking device.

[0039] To unlock the second locking device, it has proven advantageous if the locking device is designed such that the second locking device is only unlocked when the first telescopic stage is almost fully retracted. The second locking device can therefore only be unlocked via the first telescopic stage shortly before the telescopic elements of the first telescopic stage reach their end position. This ensures improved stability, since when the door is closed, either the first telescopic stage or the second telescopic stage is retracted, and the overlap, i.e. the phase in which both the first and second telescopic stages are retracted, is minimal.The second locking device can advantageously only be unlocked when the first telescopic stage has already been retracted by more than 60%, preferably more than 70%, particularly preferably more than 80% and most preferably more than 90%.

[0040] With regard to the structural design of the unlocking element, it has proven advantageous if it is designed as a ramp for pivoting the locking element. The unlocking element can thus pivot the locking element from the locking position into the unlocking position upon contact. The unlocking element can be designed as a ramp projecting at the end relative to the first telescopic element. Furthermore, the unlocking element can be plate-shaped and extend substantially parallel to the first telescopic element.

[0041] In order to move the locking element of the second locking device into the locking position, it has proven advantageous if a telescopic element of the second telescopic stage, in particular the second telescopic element, has a locking contour with which the locking element can automatically lock. When the telescopic device or the second telescopic stage is extended, the locking element can automatically lock with the locking contour due to this movement. The two telescopic elements of the second telescopic stage can then be positively locked to one another via the locking element. Relative movement of the intermediate telescopic element with respect to the second telescopic element is then no longer possible. The locking contour can be arranged at the end, in particular on the side of the second telescopic element opposite the frame mounting element.This design allows the intermediate telescopic element to be extended as far as possible relative to the second telescopic element. The locking contour can be incorporated into the second telescopic element in the form of a notch, in particular a milled notch. For example, the notch can be punched, milled, or cut, in particular laser-cut.

[0042] With regard to the locking contour, it has also proven advantageous if it has a starting bevel and a rear grip, wherein the locking element can be automatically pivoted into the rear grip by contacting the starting bevel. When the locking element is pivoted into the rear grip, relative movement of the intermediate telescopic element with respect to the second telescopic element is no longer possible. The locking contour can be designed in the manner of a bent recess which allows engagement from behind of the locking element. The starting bevel can have an angle of approximately 45 degrees with regard to the pivot axis of the locking element so that the latter can be pivoted about the pivot axis into the rear grip when contacting the starting bevel. The locking element can be pivoted back by the unlocking element so that it no longer engages in the rear grip.The positive connection of the intermediate telescopic element with the second telescopic element can then be removed and the two elements can move relative to each other again to close the door.

[0043] With regard to the second telescopic element, it has proven advantageous if it is pivotally connected to the inside of the door frame via the frame mounting element. The second telescopic element can thus be arranged pivoted about a vertical axis relative to the door frame. When the door is closed, the frame mounting element and the door mounting element can be arranged such that the first telescopic element and the second telescopic element can rotate about a common vertical axis. The entire telescopic device can then be pivoted about this axis relative to the door or the door frame in the closed position.

[0044] With regard to the object mentioned above, a door and a door frame with a locking device for locking the door in its open position are also proposed, wherein the locking device is designed as described above. This results in the advantages already described with regard to the locking device.

[0045] Furthermore, it has proven advantageous if the door is hinged to the door frame on both sides and can be held open in both the left and right positions using the holding device. Therefore, only a single holding device is provided to selectively hold the door in either open position. With regard to the positioning of the holding device, it has proven advantageous if it is located on the inside of the door. This means that the holding device can not be visible from the outside when the door is closed. When the door is opened, the holding device can extend into the opening area between the open door and the door frame.

[0046] Furthermore, with regard to the arrangement of the locking device, it has proven advantageous if it is arranged in the region of the upper or lower door edge. The door can be rectangular, and the vertical door edges can be longer than the horizontal door edges. The door mounting element can be arranged in the upper region of the door, near the upper door edge, or in the lower region near the lower door edge. The door mounting element is advantageously arranged in the upper or lower third, preferably in the upper or lower fifth, particularly preferably in the upper or lower seventh, in particular in the upper or lower tenth of the door.

[0047] Furthermore, with regard to the arrangement of the holding device, it has proven advantageous if it is arranged in the middle area of ​​the door. Due to the central arrangement, the same holding device can be used to hold the door in the right as well as in the left open position. For example, if the door is opened 90 degrees, an angle of 45 degrees can result between the telescopic device or the holding device and the door as well as the door frame, regardless of whether the door is in the left or right open position. The holding device or the door mounting element is advantageously arranged in the middle third of the door, preferably in the middle fifth, particularly preferably in the middle seventh. In particular, the door mounting element is at the same distance from both vertical door edges.In the case of single-sided hinged doors, a corresponding locking device is usually located on the edge of the door and offset in the direction of the door's pivot axis.

[0048] It has also proven advantageous if the telescopic device extends into the interior space enclosed by the door when the door is closed. The telescopic device can extend essentially perpendicular to the door plane when the door is closed. This arrangement allows the telescopic device to be extended regardless of whether the door is opened around the left or right pivot axis. However, due to the pivoting arrangement of the telescopic device, it is not absolutely necessary for it to be positioned exactly perpendicular to the door when the door is closed. When the door is opened, the locking device can be automatically aligned relative to the door via the pivoting linkage.

[0049] With regard to the arrangement of the frame mounting element, it has proven advantageous if it is located on the inside of the door frame, particularly in the central area of ​​the door opening that can be closed by the door. The frame mounting element can thus be arranged on the side of the frame mounting element opposite the door mounting element, so that the two mounting elements are arranged in close proximity to each other. The distance of the door mounting element from the upper edge of the door and the distance of the frame mounting element from the upper edge of the door opening can be approximately the same.

[0050] With regard to the telescopic device, it has also proven advantageous if, in the extended position, it is longer than 0.7 times the width of the door. This design allows the telescopic device to be positioned in the center of the door, allowing the door to be opened both around the right pivot axis and the left pivot axis. Further details and advantages of the invention will be explained in more detail below with reference to the accompanying drawings. In the drawings:

[0051] Fig. 1a is a schematic perspective interior view of a closed door which can be locked in both the left and right open positions by means of a locking device;

[0052] Fig. 1b is an enlarged view of the locking device according to Fig. 1a;

[0053] Fig. 2 is a schematic exploded view of a locking device;

[0054] Fig. 3a, 3b the locking device in a view from above and a view from below in a retracted position;

[0055] Fig. 4a, 4b the locking device in a view from above and a view from below in an extended position.

[0056] The illustrations in Fig. 1a and Fig. 1b show a door 20 hinged on both sides, in its closed position as viewed from the interior space closed off by the door 20. The door opening located in the door frame 30 is thus covered or closed by the door 20. Since the door 20 is hinged on both sides, it can be opened outwards about both a right and a left pivot axis. The corresponding hinges are arranged on the outside of the door 20, so that they cannot be seen in the illustrations in Fig. 1a and 1b. In the central area near the upper edge of the door 20, a locking device 10 is arranged, which will be described in more detail below with regard to the other illustrations.The locking device 10 reliably locks the door 20 in both its right and left open positions, so that to close the door it is first necessary to unlock the locking device 10. As can also be seen from Fig. 1a and Fig. 1b, the locking device 10 or the telescopic device 6 of the locking device 20, which will be described in more detail below, projects in the direction of the interior space closed off by the door 20. This is accompanied by the telescopic device 6 being extended when the door 20 is opened, regardless of the opening direction. If the door 20 has then been opened by 90 degrees, for example, the telescopic device 6 can be arranged at an angle of approximately 45 degrees to the door plane. In an alternative embodiment, the locking device 10 can also be arranged in the lower region of the door 20. As can be seen from Fig.1a, this would essentially correspond to an arrangement rotated by 180 degrees.

[0057] The structural design of the locking device 10 will now be explained below with reference to the detailed drawings. The illustration in Fig. 2 first shows a schematic exploded view of the locking device 10, which shows the essential parts. The locking device 10 essentially consists of a telescopic device 6, which is pivotally connected to the door 20 via a door mounting element 1.1 and pivotally connected to the door frame 30 via a frame mounting element 2.1. The two mounting elements 1.1, 2.1 can be screwed to the door 20 and the door frame 30 as shown in Figs. 1a and 1b and, when the door is closed, can be arranged one above the other in such a way that the telescopic device 6 can be pivoted about a vertically aligned axis. The telescopic device 6 itself essentially consists of two telescopic stages 6.1, 6.2, namely a first telescopic stage 6.1 and a second telescopic stage 6.2.The two telescopic stages 6.1, 6.2 are arranged in a row, allowing the telescopic device 6 to be extended twice. Since the locking device 10 is hinged in the center of the door 20 and in the center of the frame 30, it must be longer and extendable, for example, than a locking device for a single-sided door 20.

[0058] To implement the two telescopic stages 6.1, 6.2, the locking device 10 has three telescopic elements 1, 2, 3. The first telescopic element 1, which is connected to the door 20 via the door mounting element 1.1, is guided in an intermediate telescopic element 3, and the intermediate telescopic element 3 is in turn guided in a second telescopic element 2, which is connected to the door frame 30 via the frame mounting element 2.1. It is therefore possible to move the intermediate telescopic element 3 in a linear direction relative to the second telescopic element 2 and to move the first telescopic element 1 in a corresponding manner relative to the intermediate telescopic element 3. The second telescopic element 2 therefore acts as a linear guide for the intermediate telescopic element 3, and the intermediate telescopic element 3 acts as a linear guide for the first telescopic element 1.

[0059] From a structural point of view, the first telescopic element 1 is designed as a rail with a U-shaped cross-section. The two other telescopic elements 2, 3 are configured in such a way that they not only provide lateral guidance for the guided telescopic elements 1, 2, but also encompass the guided telescopic elements 1, 2 in such a way that they are also fixed vertically in the leading telescopic elements 2, 3. The telescopic elements 1, 2, 3 can thus only be extended in the axial direction, but cannot be rotated, pivoted, or tilted relative to one another.

[0060] To reliably secure the door 20 in the open position so that it cannot be accidentally closed again, it is necessary to lock the two telescopic stages 6.1, 6.2 in the extended position. In the locked position, the telescopic elements 1, 2, 3 can no longer be moved relative to one another, so that the open door can no longer be moved, but is fixed relative to the door frame 30 by the locking device 10.

[0061] In order to lock and secure the telescopic elements 1, 2, 3 together, two locking devices 4, 5 are provided, which, for the sake of clarity, are referred to below as the first locking device 4 and the second locking device 5. The first locking device 4 is assigned to the first telescopic stage 6.1 and, in the locked position, can prevent a relative movement of the first telescopic element 1 relative to the intermediate telescopic element 3. The second locking device 5, on the other hand, is assigned to the second telescopic stage 6.2 and can accordingly prevent a movement of the intermediate telescopic element 3 relative to the second telescopic element 2.

[0062] The two locking devices 4, 5 are designed such that they lock automatically when the door 20 is opened and an open position is reached, regardless of whether this is the right or left open position, so that no manual intervention is required for locking. First, the design of the first locking device 4 will now be described, before the design of the second locking device 5 is discussed in more detail. The first locking device 4 is arranged on the underside of the first telescopic element 1 in the end region opposite the door mounting element 1.1. The first locking device 4 essentially consists of three elements, namely the actual locking element 4.1, a spring 4.2, and a guide 4.3. The guide 4.3 is screwed to the first telescopic element 1 from below, and the locking element 4.1 is thus located in the guide 4.3 is arranged so that the locking element 4.1 can be moved vertically in the guide 4.3.

[0063] When the door 20 is now opened, the first telescopic element 1 slides in the intermediate telescopic element 3. According to the illustration in Fig. 2, the first telescopic element 1 would therefore move accordingly to the left relative to the intermediate telescopic element 3. The intermediate telescopic element 3 has a bevel at its end assigned to the first telescopic element 1, which functions as a stop 3.2. When the first telescopic element 1 is moved relative to the intermediate telescopic element 3, the guide 4.3 slides in the intermediate telescopic element 3 until it reaches the stop 3.2. Further extension of the first telescopic stage 6.1 is then no longer possible. As can be seen in the illustration in Fig. 2, and even better in the illustration in Fig. 3a, the intermediate telescopic element 3 has a locking recess 3.1 in its lower part shortly before the stop 3.2. When the two telescopic elements 1, 3 have reached their end position and the guide 4.3 is at the stop 3.2, the locking element 4.1 is located directly above the locking recess 3.1. Since the locking element 4.1 is pre-tensioned downward by the spring 4.2, the locking element 4.1 automatically engages the locking recess 3.1 upon reaching the end position, thereby positively connecting the first telescopic element 1 and the intermediate telescopic element 3. Relative movement of the two telescopic elements 1, 3 is then no longer possible.

[0064] If the door 20 is to be closed again, it is first necessary to unlock the locking element 4.1 and thus move it out of the locking recess 3.1. To do this, the locking element 4.1 can be pressed from below, for example with a finger, through the locking recess 3.1 and thus moved against the force of the spring 3.1. In this unlocked position, the locking element 4.1 no longer engages in the locking recess 3.1, so that the locking connection between the two telescopic elements 1, 3 is canceled and they can then be moved relative to each other again.

[0065] In Fig. 4b, the locking device 10 or the telescopic device 6 is shown in an extended position from below. Visible here is the locking element 4.1 protruding through the locking recess 3.1, which can be returned to the unlocked position by a corresponding pressure force, which then enables a relative movement of the two telescopic elements 1, 3 of the first telescopic stage 6.1 to close the door 20.

[0066] The second locking device 5 is arranged at the opposite end of the locking recess 3.1 of the intermediate telescopic element 3. The second locking device 5 essentially consists of a bearing element 5.2, on which a locking element 5.1 designed as a locking lever is arranged so as to be pivotable about a pivot axis extending in the horizontal direction.

[0067] The functioning of the locking of the second telescopic stage 6.2 via the second locking device 5 will now be explained in more detail with reference to Fig. 3a and Fig. 4a. In Fig. 3a, the locking device 10 is in the retracted position and the door 20 is therefore closed. If the door 20 is opened, the intermediate telescopic element 3, which is guided in the second telescopic element 2, moves forward. In the arrangement according to Fig. 2, this would correspond to a movement of the intermediate telescopic element 3 to the right. Since the second telescopic element 2 is connected to the fixed door frame 30 via the frame mounting element 2.1, the second telescopic element 2 does not move or does not move in a linear direction.

[0068] The second telescopic element 2 has the locking contour 2.2 on its rear side, as shown in Fig. 3a. This locking contour 2.2 essentially consists of a ramp 2.1 and a rear grip 2.22. If the second telescopic stage 6.2 is extended when the door 20 is opened, the locking element 5.1 comes into contact with the ramp 2.21 shortly before reaching the end position, which leads to a movement of the locking element 5.1 about its axis of rotation. This movement pivots the locking element 5.1 into the rear grip 2.22, as can be seen in the illustration in Fig. 4a. A backward movement of the intermediate telescopic element 3 is then no longer possible, since the intermediate telescopic element 3 is fixed relative to the second telescopic element 2 by the locking element 5.1 arranged in the rear grip 2.22. The two telescopic elements 2, 3 and the second telescopic stage 6.2 are thus locked.

[0069] If the door 20 is to be closed, it is necessary to unlock the second locking device 5 again, for which the locking element 5.1 must be pivoted out of the rear grip 2.22. For this purpose, an unlocking element 5.3 is provided, which is designed in the manner of a ramp. In the exemplary embodiment, the unlocking element 5.3 is part of the first telescopic stage 6.1 and is attached to the TI opposite the door mounting element 1.1.

[0070] The release element 5.3 is arranged protruding from the end of the first telescopic element 1, as can be seen in the illustration in Fig. 2. The release element 5.3 is connected to the first telescopic element 1 via a screw, which also serves to fasten the guide 4.3 to the first telescopic element 1.

[0071] As can be imagined from Fig. 4a, when the door 20 is closed, the first telescopic element 1 initially slides down into the intermediate telescopic element 3, for which the first locking device 4 must first be unlocked. Movement of the second telescopic stage 6.2 or the intermediate element 3 relative to the second telescopic element 2 is initially prevented by the second locking device 5. When the door 20 is closed, the first telescopic element 1 and thus also the unlocking element 5.3 also move relative to the second telescopic element 2. Shortly before the first telescopic stage 6.1 is fully retracted, the unlocking element 5.3 comes into contact with the locking element 5.1 and pivots it out of the rear grip 2.22. No additional manual intervention is required for this; only the locking element 5.1 is automatically unlocked due to the relative movement of the first telescopic element 1 relative to the other two telescopic elements 2, 3 when the door 20 is closed.

[0072] When the second locking device 5 is then unlocked, the intermediate telescopic element 3 can be moved relative to the second telescopic element 2 during a further closing movement of the door 20 and can slide within the second telescopic element 2. When the end position is reached and the door 20 is closed, the locking device 10 is in the position shown in the illustrations in Figs. 3a and 3b.

[0073] To close a door 20 that has been locked in the open position, it is only necessary to unlock the first locking device 4. The second locking device 5 is then automatically unlocked via the kinematics of the telescopic elements 1, 2, 3, for which no manual intervention is required. When the door is opened, both locking devices 4, 5 result in automatic locking, so that no further intervention is required to secure the door 20. The door 20 is automatically locked upon reaching both the left and right open positions and can no longer be closed inadvertently.

[0074] Reference symbol:

[0075] 1 first telescopic element

[0076] 1.1 Door mounting element

[0077] 2 second telescopic element

[0078] 2.1 Frame mounting element

[0079] 2.2 Locking contour

[0080] 2.21 Starting slope

[0081] 2.22 Rear grip

[0082] 3 Intermediate telescopic element

[0083] 3.1 Recess

[0084] 3.2 first stop

[0085] 4 first locking device

[0086] 4.1 Locking element / push button

[0087] 4.2 Spring

[0088] 4.3 Leadership

[0089] 5 second locking device

[0090] 5.1 Locking element / locking lever

[0091] 5.2 Bearing element

[0092] 5.3 Release element

[0093] 6 Telescopic device

[0094] 6.1 first telescopic stage

[0095] 6.2 second telescopic stage

[0096] 10 locking device

[0097] 20 Door

[0098] 30 door frames

Claims

Patent claims:

1. A locking device for locking a door (20) hinged on both sides relative to a door frame (30) in its left open position and its right open position, comprising a door mounting element (1.1) for arrangement on the door (20) and a frame mounting element (2.1) for arrangement on the door frame (30), characterized in that the two mounting elements (1.1, 2.1) are telescopically connected to one another via a telescopic device (6).

2. Locking device according to claim 1, characterized in that the telescopic device (6) has at least two telescopic stages (6.1, 6.2), wherein the two telescopic stages (6.1, 6.2) can each be locked independently of one another via a locking device (4, 5).

3. Locking device according to claim 2, characterized in that the two locking devices (4, 5) are designed as separate structural units.

4. Locking device according to one of claims 2 or 3, characterized in that the first locking device (4) can be automatically locked and manually unlocked upon movement of the telescopic elements (1, 3) of the first telescopic stage (1.6).

5. Locking device according to one of claims 2 to 4, characterized in that the first locking device (4) is designed as a snap-in lock.

6. Locking device according to one of claims 2 to 5, characterized in that the second locking device (5) can be automatically locked when the second telescopic stage (6.2) is pulled out.

7. Locking device according to one of claims 2 to 6, characterized in that the second locking device (5) can be unlocked automatically.

8. Locking device according to one of claims 2 to 7, characterized in that the second locking device (5) has a locking element (5.1) which can be pivoted back and forth between a locking position and an unlocking position.

9. Locking device according to one of claims 2 to 8, characterized in that the second locking device (5) can be unlocked via an unlocking element (5.3), wherein the unlocking element (5.3) is arranged on a telescopic element (1) of the first telescopic stage (6.1).

10. Locking device according to claim 9, characterized in that the unlocking element (5.3) can contact the locking element (5.1) when the first telescopic stage (6.1) is retracted and can transfer the latter into the unlocking position. 11 . Locking device according to one of claims 2 to 10, characterized in that a telescopic element (2) of the second telescopic stage (6.1) has a locking contour (2.2) with which the locking element (5.1) can lock automatically. Locking device according to claim 11, characterized in that the locking contour (2.2) has a run-on bevel (2.21) and a rear grip (2.22), wherein the locking element (5.1) can be pivoted behind the rear grip (2.22) by contacting the run-on bevel (2.21). Door (20) and door frame (30) with a locking device (10) for locking the door (20) in its open position, wherein the locking device (10) is designed according to one of the preceding claims. Door (20) and door frame (30) according to claim 13, characterized in that the locking device (10) is arranged on the inside of the door (20), in the region of the upper or lower door edge and in the central region of the door (20). Door (20) and door frame (30) according to one of claims 13 or 14, characterized in that the telescopic device (6) extends into the interior space closed by the door (20) when the door (20) is closed.

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