SLIDING DOOR SYSTEM

Description

[0001] The invention relates to a sliding door system with an emergency opening system and a method for emergency opening of the sliding door system.

[0002] Sliding door systems comprise a sliding door that is retractable into a wall, and a door frame that provides the necessary support for the sliding door and anchors it to the building. The sliding door is installed between two preferably panel-shaped wall elements of a building wall and has at least one door leaf, the outer surface of which forms the visible surface of the sliding door when closed. The door leaf is mounted on a guide body that can be moved in the closing and opening directions. The door leaf has approximately the dimensions of a door opening in the associated wall element and can be moved transversely to the outer surfaces of the wall elements such that, when the sliding door is closed, the visible surface of the door leaf is flush with the visible surface of the associated wall element. Such doors or sliding doors are also referred to as wallpaper doors.Such sliding doors are typically equipped with two door leaves mounted on the same guide frame. When the sliding door is closed, the outer surface of the second door leaf is also flush with the outer surface of the associated wall element. Such sliding doors, and especially the door openings, are difficult to see when closed, which is aesthetically advantageous.

[0003] DE 101 63 061 B4 discloses a sliding door comprising a guide body that can be moved horizontally between two wall panels and on which two door leaves that can be spread apart in opposite directions are mounted. When the sliding door is closed, the outer surfaces of the spread-apart door leaves are flush with the outer surfaces of the two visible surfaces of the wall. The guide body can be moved horizontally along a linear guide and is driven by a traction drive powered by an electric motor.At least one door leaf is connected to the displaceable guide body via guide levers forming a parallelogram guide system, so that a distance measured at right angles to the outer surfaces of the wall elements between the door leaf and the guide body can be changed so that the outer surface of the door leaf can be positioned in the wall, i.e. between the two wall elements of the wall, when the sliding door is open, and in the door opening and flush with the outer surface of the wall element assigned to the door leaf when the door is closed.

[0004] Such sliding doors can be used as entrance doors in hotels, hotel rooms, co-working spaces, meeting rooms, hospitals, hospital rooms, apartments, or office spaces, among others. Such doors often demarcate a private area from a non-private area and are usually automatically locked or lockable when closed to prevent unauthorized access to the private area. A power failure while the door is closed or locked will therefore prevent the sliding door from being unlocked or opened by the electric drive.

[0005] The invention is based on the object of creating a sliding door system with a locking device which enables the sliding door to be opened or unlocked from a private room even when the power is off, but which cannot be unlocked from a non-private room.

[0006] According to a first aspect of the invention, a sliding door system solves this problem. The sliding door system has a sliding door, a door frame, and a locking system. The sliding door comprises a first door leaf and a second door leaf, which are mounted such that a distance between the first door leaf and the second door leaf is smaller when the sliding door is open than when the sliding door is closed. The locking system comprises a lock attached to the sliding door and a locking part mounted on the door frame. The lock has an anchor body rotatably mounted about a rotation axis, said body having an engagement notch, and the locking part has a first latch.In a locked state of the locking system, the first latch engages the engagement notch of the anchor body to lock the sliding door, and a bolt on the anchor body engages an engagement region to prevent the anchor body from rotating about the rotation axis. The lock has an actuator that can move the bolt out of engagement with the anchor body to bring the locking system from the normally locked state to an unlocked state by rotating the anchor body about the rotation axis. The locking system has an emergency opening function that can be actuated by an emergency activation force.The emergency opening function releases the locking of the sliding door by a movement of the lock caused by the emergency activation force, wherein the direction of movement of the lock is substantially perpendicular to the surface of the first door leaf and the lock is displaceable relative to the locking part to such an extent that the engagement notch can be displaced out of the engagement area of ​​the first latch, thereby making the sliding door openable.

[0007] According to a second aspect of the invention, a method for emergency opening of a sliding door system solves the problem. The method for emergency opening of a sliding door system according to the first aspect of the invention, comprising the steps: Applying the emergency activation force to the first door leaf. Moving the first door leaf so that the gap between the first door leaf and the second door leaf is reduced, and simultaneously guiding the lock between the first door leaf and the second door leaf so that the first door leaf and the lock move in substantially the same direction. Emergency opening of the locking system by allowing the first latch to pass through the engagement notch of the anchor body.

[0008] The sliding door comprises a first door leaf and a second door leaf, both of which are mounted in such a way that the distance between the first and second door leaves can be reduced when the sliding door is opened. When the sliding door is closed, the distance is greater again, so that the outer surfaces of the two door leaves are typically flush with the surface of the wall. Typically, at least one of the two door leaves is flush with the wall surface on the wall side of this door leaf. Preferably, both door leaves are flush on their respective wall sides.

[0009] Preferably, the distance between the first door leaf and the second door leaf is defined as the distance between the flat outer surfaces of the two door leaves. One door leaf is preferably flush with the wall surface on the wall side of this door leaf. Preferably, both door leaves are flush on their respective wall sides.

[0010] The door frame is anchored to the building structure. The door frame accommodates a guide rail and the locking element. Once the door locking system is unlocked, the sliding door can be opened.

[0011] The rotation axis of the anchor body preferably runs vertically. This eliminates the need for any alignment of the lock to the striking part. The sliding door is typically height-adjustable. This shifts the position of the lock relative to the striking part. The alignment of the rotation axis of the anchor body allows the height to be adjusted without having to subsequently adjust the striking part or the lock, as both the lock can be positioned precisely horizontally relative to the sliding door and the striking part can be positioned precisely horizontally within the door frame. The locking system allows for play in the vertical direction. The sliding door system is preferably installed so that a person can walk through it horizontally. The door leaves are aligned vertically. The direction of movement of the two door leaves from the open state to the closed state is essentially horizontal.

[0012] The emergency activation force is a force that a person applies to the first door leaf. In an emergency, the person typically tries to get out from the inside of the sliding door. To do this, the person intuitively presses on the door leaf. The force thus acting on the door leaf is understood to be the emergency activation force. This force can be translated and transmitted so that the force ultimately unlocks the sliding door via a mechanical chain of effects. The emergency can be caused by a power failure in the building. However, a fire or other threat can also cause the person to want to open the sliding door.

[0013] By applying the emergency activation force to the first door leaf, which is typically located on an interior or private side of the door, the first door leaf, which is flush with the interior wall surface before the emergency activation force is applied, is pushed slightly into the wall. The internal structure of the sliding door transmits this displacement at least partially to the lock. The transmission takes place, for example, via a parallelogram guide system and the guide body. The second door leaf of the sliding door remains at rest during this time. Since the second door leaf is at rest, but the first door leaf is displaced by the emergency activation force, the emergency activation force causes a reduction in the distance between the first door leaf and the second door leaf.

[0014] Possible features and advantages of embodiments of the invention may be considered, among other things and without limiting the invention, to be based on ideas and findings described below.

[0015] According to a preferred embodiment of the sliding door system, the emergency activation force is applied directly to the first door leaf of the sliding door system.

[0016] In other words, the anchor plate is arranged in such a way that emergency opening only functions when the emergency activation force is applied to the first door leaf, and the sliding door is unlocked. In particular, applying a force corresponding to the emergency activation force, but of the same magnitude but in the opposite direction, to the second door leaf does not unlock the sliding door. The sliding door cannot therefore be opened by pressing on the second door leaf. This is achieved by arranging the engagement notch of the anchor plate substantially on the side of the first door leaf. It is advantageous for the first door leaf to be arranged on the side of the sliding door from which emergency opening of the sliding door is required. In particular, the first door leaf is arranged on the private side of the sliding door.The second door leaf is preferably mounted on the side of the sliding door from which emergency opening of the sliding door is not permitted. In particular, the second door leaf is located on the publicly accessible, non-private, side of the sliding door.

[0017] The emergency activation force is applied directly to the first door leaf. No additional elements such as door latches or emergency release levers are activated; instead, the emergency activation force is applied directly to the surface of the first door leaf.

[0018] The advantage is that people inside the home or office can leave the area even if the actuator cannot unlock the locking system, for example, due to a power outage. Since the emergency opening also works non-destructively, it can be used in life-threatening emergencies, such as a fire. It can also be used if the door needs to be opened in the event of a power outage or a defective door drive.

[0019] According to a preferred embodiment, the emergency activation force can be applied perpendicularly to the first door leaf of the sliding door system.

[0020] This means that the emergency activation force can be applied essentially perpendicularly to the first door leaf. Advantageously, a person can simply push against the first door leaf, thereby causing the emergency opening of the door. Especially when evacuating multiple people in a life-threatening emergency, it is important that the emergency opening of the sliding door can be operated intuitively and quickly. Advantageously, pushing against the first door leaf is intuitively the first method of opening that a fleeing person would use to open the door.

[0021] In addition, this solution is aesthetically pleasing because no emergency opening buttons or handles need to be installed on or near the door.

[0022] According to a preferred embodiment, the lock and the locking part are designed such that a counter-movement of the lock against the direction of movement is blocked, and that the second door leaf remains stationary and the sliding door remains locked if a pressure force of the same magnitude as the emergency activation force is applied to the second door leaf.

[0023] The direction of movement describes the direction of movement of the lock caused by the emergency activation force.

[0024] In other words, it is not possible to cause an emergency opening by applying a force equivalent to the emergency activation force to the second door leaf, i.e., from the non-private side of the sliding door. The position of the lock relative to the locking element is limited on one side when the sliding door is closed. This means that a relative movement of the lock in a direction toward the second door leaf leads to an emergency opening of the sliding door, as described above, while a relative movement of the lock in a direction toward the first door leaf is prevented. This one-sided limitation of the relative position is preferably implemented structurally via stop surfaces on the lock and locking element.

[0025] The sliding door remains locked even if a pressure force greater than the emergency activation force is applied to the second door leaf. The pressure force can be any size, as long as it is less than the strength of the sliding door system.

[0026] According to a preferred embodiment, the anchor body is plate-shaped.

[0027] This makes the anchor plate very easy and cost-effective to manufacture from a plate-shaped workpiece. The anchor plate is preferably punched, lasered, milled, waterjet cut, or eroded from a plate-shaped piece of metal or a metal strip. Alternatively, the anchor plate can be printed, forged, or cast.

[0028] According to a preferred embodiment, the anchor body is substantially circular in shape and an outer region of the anchor body has a substantially sector-shaped cutout, the two ends of which form in particular the engagement region and the engagement notch.

[0029] This design allows the required functions of the anchor part to be realized with a very simple geometry. Furthermore, the circular contour of the anchor plate ensures easy centering of the lock in the locking part.

[0030] According to a preferred embodiment, the anchor body is attached to the lock in such a way that the rotation about the axis of rotation is limited by two stops in such a way that at the first stop the locking system keeps the door closed and at the second stop the anchor body can pass the latch.

[0031] The two stops thus define the extreme positions that the anchor body must reach. The rotation of the anchor body is limited between these two stops. Further rotation of the anchor body beyond these extreme positions, i.e., beyond the first or second stop position, is neither necessary nor advantageous.

[0032] According to a preferred embodiment, the anchor body is connected to the lock via a spring, so that the spring exerts a preload force on the anchor body, which presses the anchor body against the first stop.

[0033] As a result, the anchor body is almost always positioned at the first stop. Therefore, the bolt can engage the engagement area as soon as it is positioned. Even when the sliding door is closed, the anchor body is held in a defined position. The first latch can therefore always be pushed back precisely. After passing the engagement notch, the sliding door is securely locked, as the engagement notch is in the correct position to engage or interlock with the first latch, thus securely locking the door.

[0034] According to a preferred embodiment, the actuator is designed as an electric drive.

[0035] The electric drive is easily controlled via electronics. It is preferably a solenoid. The electric drive is preferably directly connected to the bolt, particularly on a common operating axis.

[0036] According to a preferred embodiment, a guide body to which the lock is attached is mounted, in particular via a parallelogram guide system, such that the guide body is always located in the middle between the first door leaf and the second door leaf.

[0037] This allows for a symmetrical design of the sliding door system. The symmetrical design makes the individual components more uniform. In particular, the parallelogram guide system, the door frame, and, more generally, the profiles from which the sliding door system is made are more uniform. Therefore, production costs are lower.

[0038] According to a preferred embodiment, the locking part has a second latch opposite the first latch, wherein the locking part can be inserted between the first latch and the second latch.

[0039] The second latch serves to secure the engagement between the first latch and the anchor body in the locked state. The second latch defines the magnitude of the emergency activation force required to open the sliding door in an emergency by means of the pre-tensioning force of the latch spring of the second latch. Typically, the emergency activation force applied to the first door leaf is significantly greater than the pre-tensioning force of the latch spring. The second latch is moved against the pre-tensioning force of the latch spring to move the engagement notch of the anchor body out of the engagement area of ​​the first latch, thereby unlocking the sliding door.

[0040] The second latch can be of the same design as the first. This ensures symmetrical centering when inserting the lock into the locking body. And a uniform type of latch can be installed on both sides of the locking part.

[0041] Alternatively, the second latch can be optimized so that the emergency activation force required is adapted to the force that can be exerted by a person. This allows the second latch to use a latch spring that is stronger than the latch spring of the first latch, keeping the sliding door securely locked in other operating situations. The latch spring of the first latch is less strong, so that it offers little resistance to the anchor body during locking. This allows for smooth locking.

[0042] According to a preferred method, the emergency opening comprises the step Pushing the second latch through the lock as a result of the movement of the lock caused by the emergency activation force.

[0043] The second latch allows you to set a defined force as the emergency activation force. The more a latch spring preloads the second latch, the harder a person must push against the first door leaf to open the sliding door.

[0044] According to a preferred method, the second door leaf is substantially at rest in a first phase of reducing the distance between the first door leaf and the second door leaf before the sliding door is unlocked.

[0045] In an initial phase of reducing the distance between the first door leaf and the second door leaf before the sliding door is unlocked, the first door leaf is moved by only a few millimeters, typically less than 5 mm. After this initial phase, i.e., after the door is unlocked, the distance between the two door leaves is further reduced, and then the sliding door is moved essentially horizontally and moved into the open position. During this movement into the open position, the second door leaf also moves.

[0046] The direction of the emergency opening, i.e. the side of the sliding door from which the emergency opening can be operated, can be reversed by turning the lock. The lock is attached to the guide body with one or more fasteners, such as screws. To turn the lock, the fastener is loosened. The lock is removed from the guide body or a bracket on the guide body in the direction of movement of the sliding door. The lock is then rotated 180° so that the engagement notch is now on the other side of the sliding door. The lock is pushed back into the guide body or the bracket on the guide body and fastened.

[0047] The lock can only be turned if the sliding door is in the open position. This ensures that the emergency opening direction can only be carried out by persons who can open the sliding door. Furthermore, the turning of the lock can be secured against unauthorized turning by additional security devices such as a locking cylinder. The locking part can be turned in a similar way to the lock. A fastening element of the locking part on the door frame is loosened, the locking part is removed, turned over, pushed back in and fastened again. The locking part is only turned if the latch spring of the first latch and the latch spring of the second latch are of different strengths. If the latch spring of the first latch and the latch spring of the second latch are identical, turning is not necessary.

[0048] Further advantages, features, and details of the invention will become apparent from the following description of exemplary embodiments and from the drawings, in which identical or functionally equivalent elements are provided with identical reference numerals. The drawings are merely schematic and not to scale.

[0049] Showing: Fig. 1 a sliding door system, Fig. 2 a section through a sliding door system, Fig. 3 the closing of the sliding door system, Fig. 4 the normal unlocking of the sliding door system, Fig. 5 the emergency unlocking of the rail system, and Fig. 6 the anchor body in detail.

[0050] Fig. 1 shows a sliding door system 100. The parallelogram guide system 23 is attached to a guide body 24 of the sliding door 20. On this parallelogram guide system, the Fig.1 not shown, door leaves are attached. The sliding door 20 is slidably mounted so that it can be moved from an open state to a closed state and back again. In the closed state, the door leaves are spaced far enough apart that they are flush with the wall into which the sliding door 20 is recessed. In the open state, the door leaves are spaced closer together than in the closed state, so that the sliding door can be retracted into a wall. The sliding door also has a door frame 30 that is firmly connected to the wall.

[0051] In order to keep the sliding door 20 in a closed state, the sliding door system 100 has a locking system 40. The locking system consists of a lock 41 which is attached to the sliding door and a locking part 50 which is attached to the door frame 30.

[0052] Figur 2 shows the sliding door system from the Fig. 1 in a horizontal section. The sliding door system is shown in a locked state.

[0053] In addition to the Fig. 1 shows the Fig. 2 the first door leaf 21 and the second door leaf 22. The first door leaf 21 is the inner door leaf, i.e. typically in the apartment or office, while the second door leaf 22 is typically the outer door leaf, i.e. facing outwards onto the corridor in front of the office or apartment.

[0054] If a person presses on the second door leaf 16 and applies a force corresponding to the emergency activation force (110), the second door leaf only moves very slightly. Due to the symmetrical parallelogram guide system, the guide body moves exactly half that distance. This movement is stopped by the anchor body 10 coming into contact with the locking part 50. The first latch 51 would then be slightly pressed. The sliding door 20 is locked because the engagement notch 44 is securely engaged or interlocked with the first latch 51. However, the door cannot be pushed in because the lock is securely supported in the locking part 50. In an upper area of ​​the sliding door 20, this is supported by the guide rail. The door is therefore securely protected against burglary.

[0055] Fig. 3 shows the process of closing the sliding door 20. Fig. 3a shows the state before closing. A spring (not shown) presses the anchor body with a first stop 15 against a bolt 17. When the door is open, the anchor body 10 is thus in the orientation shown. Fig. 3b shows a first contact between the armature body 10 and the first latch 51. Even if large frictional forces occur at this contact, the armature body 10 cannot rotate further, since it is already at the first stop. In Fig. 3c the first latch 51 behind the anchor body has fallen back in and the sliding door 20 is securely locked.

[0056] Fig. 4 shows the normal unlocking of the sliding door 20. The spring (not shown) still presses the first stop 15 of the anchor body 10 against the bolt 17. The spring force is selected to be large enough that this configuration is maintained even if tensile forces act on the guide body when the sliding door is closed. Such tensile forces can be caused, for example, by the contact pressure of seals on the door panels. In the configuration described, there is a small gap, i.e. play, between the bolt 46 and the engagement area 47. If large tensile forces are applied, this gap would be eliminated, and the bolt 46 would keep the door locked by the engagement notch 44 firmly engaging or interlocking with the first latch 51. If, however, no large tensile forces are applied, the bolt 46 can be removed from the engagement area 47 with very little force. The anchor body can now be rotated by a tensile force, and the sliding door can be opened.

[0057] Fig 5 shows the emergency opening procedure. Typically, emergency opening is required so that a person can escape from a room, office, or apartment. However, it can also be required if, for example, the actuator is defective or there is simply a power failure. To do this, the person presses on the door leaf in front of them as soon as they reach the door. The person thus applies an emergency activation force to the first door leaf 21. The parallelogram guide system 23 transmits the emergency activation force to the guide body 25. This guide body 25 is guided at the top by the guide rails and at the bottom by a guide against the locking system. The guide body is slightly elastic, so that the guide body can deform slightly and thus shift. This pushes back the second latch, and the engagement or toothing between the first latch and the engagement notch 44 is canceled, as shown in Fig. 5b is shown. Since the sliding door 20 is no longer locked, the guide body 25 and the entire sliding door 20 can be moved along the guide rail and thus opened.

[0058] An unauthorized person attempting to gain access to a private area only has access to the outer, non-private door leaf. This is typically the second door leaf 52. The sliding door cannot be opened this way. Pressing on the sliding door at the second door leaf moves the guide body 25 a maximum of until it rests against the outer edge of the engagement notch 44 next to the first latch 51. Pulling on the second door leaf 22, for example, using a vacuum lifter, only pulls the second door leaf more firmly into the door frame 30. The second door leaf 22 rests against the door frame and then merely compresses the seals (not shown).

[0059] Figur 6shows an isometric view of the most important components, particularly the anchor body 10 with its rotation axis 13. The first stop 15 and the second stop 16 are realized as the ends of a milled recess, with a bolt 17 secured in the recess. The spring 18 biases the anchor body into a position in which the bolt 17 rests against the first stop 15. The latch 46 can be actuated by the actuator 49.

[0060] Finally, it should be noted that terms such as "having," "comprising," etc., do not exclude other elements or steps, and terms such as "a" or "an" do not exclude a plurality. Furthermore, it should be noted that features or steps described with reference to one of the above embodiments may also be used in combination with other features or steps of other embodiments described above. Reference signs in the claims are not to be considered as limitations.

Claims

1. Sliding-door system (100), comprising a sliding door (20), a door frame (30), and a locking system (40), the sliding door (20) comprising a first door leaf (21) and a second door leaf (22), which are mounted such that a distance between the first door leaf (21) and the second door leaf (22) in an open state of the sliding door (20) is smaller than in a closed state of the sliding door (20), the locking system (40) comprising - a lock (41), which is fastened to the sliding door (20), and a locking part (50) which is mounted on the door frame (30), wherein - the lock (41) has an anchor body (10) which is mounted so as to be rotatable about a rotational axis (13) and has an engagement notch (44), and - the locking part (50) has a first latch (51), wherein, in a locked state of the locking system (40), the first latch (51) engages in the engagement notch (44) of the anchor body (10) in order to lock the sliding door (20), and a bolt (46) engages on the anchor body (10) in an engagement region (47) in order to thus prevent the anchor body (10) from rotating about the rotational axis (13), and the lock (41) has an actuator (48) which can move the bolt (46) out of the region (47) of engagement with the anchor body (10) in order to move the locking system (40), during normal operation, from the locked state into an open state by the anchor body (10) rotating about the rotational axis (13), characterized in that the locking system has an emergency opening function which can be actuated by an emergency activation force (110), and the emergency opening function, by a movement of the lock (41) brought about by the emergency activation force, releases the locking of the sliding doors, wherein the movement direction of the lock (41) is substantially perpendicular to the surface of the first door leaf (21), and the lock (41) is able to be slid relative to the locking part (50) so far that the engagement notch (44) can be slid out of the engagement region (47) of the first latch (51) in order to thus make it possible to open the sliding door (20).

2. Sliding-door system (100) according to claim 1, characterized in that the emergency activation force (110) can be applied directly to the first door leaf (21) of the sliding-door system (100).

3. Sliding-door system (100) according to claim 2, characterized in that the emergency activation force (110) can be applied to the first door leaf (21) of the sliding-door system (100) in a perpendicular manner.

4. Sliding-door system (100) according to one of the preceding claims, characterized in that the lock (41) and the locking part (50) are designed such that a counter movement of the lock (41) against the movement direction is blocked, and that the second door leaf (22) pauses, and the sliding door remains locked, if a compressive force of the same magnitude as the emergency activation force (110) is applied to the second door leaf (22).

5. Sliding-door system (100) according to one of the preceding claims, characterized in that the anchor body (10) is plate-shaped.

6. Sliding-door system (100) according to one of the preceding claims, characterized in that the anchor body (10) is substantially circular, and an outer region of the anchor body (10) has a substantially sector-shaped cutout, the two ends of which in particular form the engagement region (47) and the engagement notches (44).

7. Sliding-door system (100) according to one of the preceding claims, characterized in that the anchor body (10) is fastened to the lock (41) such that the rotation about the rotational axis (13) is limited by a first stop (15) and a second stop (16), such that the locking system (40) keeps the sliding door (20) closed at the first stop (15), and the anchor body (10) can pass the latch at the second stop (16).

8. Sliding-door system (100) according to claim 7, characterized in that the anchor body (10) is connected to the lock (41) via a spring (18), so that the spring (18) exerts a preload force on the anchor body (10) which presses the anchor body (10) against the first stop (15).

9. Sliding-door system (100) according to one of the preceding claims, characterized in that the actuator (48) is designed as an electric drive.

10. Sliding-door system (100) according to one of the preceding claims, characterized in that the locking part (50) has a second latch (52) opposite the first latch (51), wherein the locking part (50) is insertable between the first latch (51) and the second latch (52).

11. Sliding-door system (100) according to one of the preceding claims, characterized in that a guide body (24), on which the lock (41) is fastened, is mounted - in particular, mounted via a parallelogram guide system - in such a way that the guide body (24) is always located in the middle between the first door leaf (21) and the second door leaf (22).

12. Method for emergency opening of a sliding-door system (100) according to one of the preceding claims, comprising the steps of: - applying the emergency activation force (110) as a compressive force on the first door leaf (21), - moving the first door leaf so that the distance between the first door leaf (21) and the second door leaf (22) is reduced, and simultaneously guiding the lock (41) between the first door leaf (21) and the second door leaf (22) such that the first door leaf (21) and the lock (41) move substantially in the same direction, - emergency opening of the locking system (40), by the first latch (21) being able to pass through the engagement notch (44) of the anchor body (10).

13. Method for emergency opening of a sliding-door system (100) according to claim 11 or 12, characterized in that the emergency opening comprises the step of: - pressing the second latch (52) through the lock (41) as a result of the movement of the lock (41) caused by the emergency activation force (110).

14. Method for emergency opening of a sliding-door system (100) according to one of claims 11 through 13, characterized in that, in a first phase of reducing the distance between the first door leaf (21) and the second door leaf (22) before the sliding door (20) is unlocked, the second door leaf remains substantially still.