Follower for bidirectional escape routes

Abstract

The invention relates to a lock nut (1) for panic locks in bidirectional escape routes, comprising a first connecting nut (1a), a nut center part (3), and a second connecting nut (2b). In order to increase security and to enable opening of a lock (13) from both sides, the first connecting nut (2a), the nut center part (3), and the second connecting nut (2b) are mounted in such a way that rotation of the first connecting nut (2a) causes rotation of the nut center part (3), with the second connecting nut (2b) remaining at rest, and rotation of the second connecting nut (2b) causes rotation of the nut center part (3), with the first connecting nut (2a) remaining at rest.

Description

[0001] The present invention relates to a lock nut according to the features of the preamble of claim 1 and a lock comprising this lock nut for use in a bidirectional escape route.

[0002] In practice, the task of bidirectional escape routes, i.e. escape routes whose escape door is normally closed and should be able to be reliably opened from both sides in an emergency, is to ensure that the escape door can be safely unlocked from both sides.

[0003] Document EP 2 855 805 B1 describes a panic lock in which the panic side of the lock can be fixed during assembly. The lock nut is designed as a three-part lock nut, comprising a first connecting nut, a second connecting nut, and a nut center part. A handle for actuating the nut can be connected to each of the first and second connecting nuts. Furthermore, a coupling element is provided on each of the two connecting nuts, with which the respective connecting nut can be coupled to the nut center part. On the side of the lock case facing away from the forend, two selection elements are provided, the first selection element being assigned to the first connecting nut and the second selection element being assigned to the second connecting nut. In order to couple a selection element to the assigned connecting nut, the selection element is screwed to the lock case.In principle, it is possible to couple both connecting sockets to the socket center section, so that the panic lock can be unlocked at any time from both sides of a door leaf by operating the handle. Such a function is desirable in bidirectional escape routes. However, the disadvantage of the solution in document EP 2 855 805 B1 is the complex side selection device.

[0004] It is an object of the present invention to provide a lock follower for a double-sided panic lock that ensures secure unlocking of the panic lock from both sides of a door leaf. The lock follower should be simple and reliable in design and, in particular, should not require a special selection device. In particular, a lock follower should be created whose inner side can be actuated independently of the outer side, so that jamming of the lock follower is impossible if either the inner side or the outer side is blocked.

[0005] This object is achieved according to the invention by a lock nut according to the features of claim 1.

[0006] A lock nut is proposed, comprising a first connecting nut, a nut center part and a second connecting nut, wherein the first connecting nut, the second connecting nut and the nut center part are rotatably mounted about a common axis of rotation, wherein the first connecting nut has a stop projection and the nut center part has a first stop element which is assigned to the stop projection of the first connecting nut.It is essential that the second connecting nut has a stop projection and the nut center part has a second stop element which is assigned to the stop projection of the second connecting nut, wherein the first connecting nut, the nut center part and the second connecting nut are mounted in such a way that a rotation of the first connecting nut causes a rotation of the nut center part, wherein the second connecting nut remains at rest, and that a rotation of the second connecting nut causes a rotation of the nut center part, wherein the first connecting nut remains at rest.

[0007] Advantageously, the lock nut can be operated from both sides. In particular, operating an inside handle and / or outside handle involves rotating the respective connecting nut in the opening direction. Setting the panic side via a selection device is not necessary. Operating an inside handle connected to the lock nut and also operating an outside handle connected to the lock nut unlocks a door lock via the lock nut. The lock nut can therefore also be referred to as a bidirectional lock nut.

[0008] One advantage is that the two handles connected to the lock nut, the inner handle and the outer handle, can be moved independently of each other. When the inner handle is operated, the outer handle does not move. When the outer handle is operated, the inner handle does not move.

[0009] Another advantage is that the inside handle prevents the lock nut from being operated from the outside, and vice versa. This also prevents the lock nut from jamming, for example, if one of the handles is held.

[0010] In particular, it can be provided that upon rotation of the first connecting nut in the opening direction, the stop projection of the first connecting nut comes into contact with or is in contact with the first stop element, wherein the first stop element acts as a driver and the nut center part is rotated together with the first connecting nut, wherein upon rotation of the first connecting nut, the stop projection of the second connecting nut moves away from the second stop element and a gap is formed between the stop projection of the second connecting nut and the second stop element, in particular such that the gap enlarges with increasing angle of rotation of the first connecting nut. As a result, even if the second stop nut becomes stuck or blocked, for example by holding the corresponding door handle, the opening of the door lock by means of the first connecting nut cannot be prevented.

[0011] It can also be provided that upon rotation of the second connecting nut in the opening direction, the stop projection of the second connecting nut comes into contact with or is in contact with the second stop element, wherein the second stop element acts as a driver and the nut center part is rotated together with the second connecting nut, wherein upon rotation of the second connecting nut, the stop projection of the first connecting nut moves away from the first stop element and a gap is formed between the stop projection of the first connecting nut and the second stop element, in particular such that the gap enlarges with increasing angle of rotation of the second connecting nut. As a result, even if the first stop nut becomes jammed or blocked, for example by holding the corresponding door handle, the opening of the door lock by means of the second connecting nut cannot be prevented.

[0012] In one embodiment, it can be provided that the nut center part is plate-shaped and in the peripheral region of the nut center part a bore is provided into which a stop pin is inserted, wherein the stop pin passes through the bore and one of the two ends of the stop pin serves as the first stop element and the other of the two ends of the stop pin serves as the second stop element, or wherein the first stop element is fastened to one of the two ends of the pin and the second stop element is fastened to the other of the two ends of the pin.

[0013] Preferably, in one embodiment, the bore is designed as a threaded bore, the stop pin is designed as a threaded pin, and the first stop element is designed as a first nut and the second stop element as a second nut. Furthermore, the first nut and the second nut can each be designed as round nuts.

[0014] It can be provided that the first stop projection has an outer contour that is complementary to the outer contour of the first nut, and that the second stop projection has an outer contour that is complementary to the second outer contour of the second nut.

[0015] Advantageously, it can be provided that the first nut and the second nut are of identical design.

[0016] The object is further achieved by a door lock, in particular a mortise lock, wherein the door lock or mortise lock has a lock nut according to one of the embodiments described herein.

[0017] In particular, one embodiment can provide for the lock nut to have a first bearing disc and a second bearing disc, wherein the first bearing disc is assigned to the first connecting nut and the second bearing disc is assigned to the second connecting nut. Each of the two bearing discs has an annular projection that interacts with a corresponding recess in a lock cover of the mortise lock or with a corresponding recess in a lock base of the mortise lock. This allows for a functionally reliable mounting of the lock nut in a door lock.

[0018] The lock follower described above is intended for use in mortise locks of doors in bidirectional escape routes. As already described, bidirectional escape routes use doors that can be opened in both directions from their closed position. A frame-side stop for the door leaf is not provided. Bidirectional escape routes are designed for swing doors.

[0019] However, the use of the bidirectional lock nut is not limited exclusively to doors in bidirectional escape routes, but can also be used for hinged doors, as described below as an example.

[0020] In hinged doors, a lock follower with two connecting followers is typically used, with the two connecting followers being pivotally connected. This can lead to a critical situation if a person on one side of the door attempts to unlock the lock by operating the handle, while another person on the other side of the door attempts to prevent the lock from being unlocked by applying a force to the handle in the opposite direction to the direction the lock is unlocking. In this case, the lock may not be able to be unlocked.

[0021] With the lock nut according to the present invention, a situation as described above is not possible. Due to the fact that the first connecting nut and the second connecting nut are always independently rotatable, the lock can be opened even if another person on the other side of the door attempts to prevent the lock from being unlocked.

[0022] The invention is explained below using several exemplary embodiments with the aid of the accompanying drawings. The exemplary embodiments shown are not to be understood as limiting. Fig. 1 shows an example of the lock nut according to the invention in its basic position. Fig. 2 shows the lock nut according to the invention with the first connecting nut actuated. Fig. 3 shows the lock nut according to the invention with the first connecting nut and the second connecting nut actuated. Fig. 4 shows the lock nut according to the invention with the second connecting nut actuated. Fig. 5 shows a mortise lock with a lock nut according to the invention.

[0023] The lock nut 1 has a first receptacle for connecting an inner handle and a receptacle for connecting an outer handle. The lock nut 1 can therefore also be referred to as a bidirectional lock nut 1. A bidirectional lock nut 1 is a lock nut 1 in which actuation of the inner handle connected to the lock nut 1 and also actuation of the outer handle connected to the lock nut 1 unlocks the lock. The two handles can be moved independently of one another. When the inner handle is actuated, the outer handle is not moved. When the outer handle is actuated, the inner handle is not moved.

[0024] In particular, a bidirectional door or escape door is understood to be a door or escape door that can be opened in both directions. Colloquially speaking, a bidirectional door can be opened by either "pulling" or "pushing." This can be a swing door, where the door leaf does not hit a door frame when closed.

[0025] The lock nut 1 is in the Figures 1 to 4It has three nut parts, namely a nut center part 3 and two connecting nuts 2a, 2b. The nut center part 3 and the two connecting nuts 2a, 2b are mounted concentrically so as to rotate about a rotation axis. The two connecting nuts 2a, 2b each have a receptacle for connecting a corresponding handle. The handles are not shown in the figures. The lock nut 1 has a sandwich-like construction, with the nut center part 3 being arranged between the first connecting nut 2a and the second connecting nut 2b.

[0026] The nut center part 3 is plate-shaped. The nut center part 3 has a bore in its peripheral area into which a stop pin 5c is inserted. The bore is designed as a threaded bore, and the stop pin is designed as a threaded pin. The longitudinal axis of the stop pin 6c is oriented essentially parallel to the rotational axis of the nut center part 3 and the two connecting nuts 2a, 2b. A first stop element 5a is attached to one of the two ends of the stop pin 5c, and the second stop element 5b is attached to the other of the two ends of the stop pin 5c. The stop elements 5a, 5b are each designed as a round nut that is screwed onto the threaded pin.

[0027] The follower center part 3 interacts with the lock mechanism of a mortise lock. When the follower center part 3 is rotated, the follower center part 3 engages with the lock mechanism, unlocking the mortise lock.

[0028] The two connecting nuts 2a, 2b each have a stop projection 4a, 4b, which interacts with one end of the cylindrical pin arranged on the nut center part 3. Upon rotation of one of the first connecting nuts 2a or the second connecting nut 2b, the stop projection 4a, 4b of the respectively rotated connecting nut 2a, 2b comes into contact with the respective stop element 5a, 5b of the nut center part 3.

[0029] Here, the rotation of the respective connecting nut 2a, 2b is transferred to the nut center part 3, so that the respective connecting nut 2a, 2b and the nut center part 3 are rotated together.

[0030] The two connecting nuts 2a, 2b each further comprise a hook-shaped projection 7a, 7b. The hook-shaped projections 7a, 7b each serve to secure a corresponding connecting rod, which is connected to an associated return spring to return the connecting nuts 2a, 2b to their basic position after actuation. A first connecting rod 8a and a first return spring 9a are associated with the first connecting nut 2a, and a second connecting rod and a second return spring are associated with the second connecting nut 2b. The connecting rod 8a and the return spring 9a are Figure 5 shown.

[0031] The hook-shaped projections 7a, 7b each have a back portion. The peripheral area of ​​the back portion is complementary to the respective outer circumference of the stop elements 5a, 5b.

[0032] Furthermore, a first bearing disc 6a and a second bearing disc 6b are provided, by means of which the bidirectional lock follower 1 is rotatably mounted between a lock cover and a lock base of a mortise lock. The first bearing disc 6a and the second bearing disc 6b are essentially annular. Each of the two bearing discs 6a, 6b has an annular projection that interacts with a corresponding recess in the lock cover or with a corresponding recess in the lock base of the mortise lock.

[0033] The following describes the function of the lock nut 1. The basic position of the lock nut 1 is Fig. 1 shown. In Fig. 2The bidirectional lock nut 1 is shown with the first connecting nut 2a actuated. The first connecting nut 2a is actuated by means of a first handle (not shown) and causes the first connecting nut 2a to rotate. When the first connecting nut 2a is rotated, the stop projection 4a of the first connecting nut 2a comes into contact with the stop pin of the nut center part, whereby the nut center part 3 is rotated together with the first connecting nut 2a. During the rotation, the section of the nut center part 3 engages with an element of the lock mechanism, which causes the mortise lock to be unlocked. It should be noted that when the first connecting nut 2a is actuated, only the nut center part 3 is moved and the second connecting nut 2b remains in its basic position, as shown in Fig. 2 is shown.

[0034] Fig. 3shows the lock nut 1 with the first connecting nut 2a and the second connecting nut 2b actuated. This corresponds to a situation in which the handle connected to the first connecting nut 2a and the handle connected to the second connecting nut 2b are actuated. In this case, the nut center part 3 is moved by the two connecting nuts 2a, 2b, which also unlocks the mortise lock in this situation.

[0035] In Fig. 4The lock nut 1 is shown with the second connecting nut 2b actuated. Actuation of the second connecting nut 2b by means of a handle (not shown) causes rotation of the second connecting nut 2b. Upon rotation of the second connecting nut 2b, the stop projection 4b of the second connecting nut 2b comes into contact with the stop pin of the nut center part 3, whereby the nut center part 3 is rotated together with the second connecting nut 2b. During the rotation, the section of the nut center part 3 engages with an element of the lock mechanism, which causes the mortise lock to be unlocked. It should also be noted here that when the second connecting nut 2b is actuated, only the nut center part 3 is moved and the first connecting nut 2a remains in its basic position, as shown in Fig. 4 is shown.

[0036] In Fig. 5 a mortise lock with the lock nut 1 described above is shown.

[0037] Here, the mortise lock is shown with the lock cover removed. In this view, only the first connecting nut 2a and the center nut 3 are shown. The second connecting nut 2b is covered by the center nut 3. Fig. 5 The connecting rod 9a and the return spring 10a can also be seen. The mortise lock also has a lock latch 10, a control latch 11, and a bolt 12. Furthermore, it is a self-locking lock. This means that the bolt 12 is automatically moved from its closed position to its pre-locked position if, with the control latch 11 retracted, the lock latch is first retracted and then extended again under spring pressure. Such a sequence control is known to those skilled in the art and requires no further explanation.

[0038] The bidirectional lock follower 1 described above is intended for use in mortise locks of doors in bidirectional escape routes. As already described above, bidirectional escape routes use doors that can be opened in both directions from their closed position. A frame-side stop for the door leaf is not provided. Bidirectional escape routes use swing doors.

[0039] The use of the bidirectional lock nut 1 is not limited exclusively to doors in bidirectional escape routes, but can also be used for hinged doors.

[0040] Because the first connecting nut 2a and the second connecting nut 2b can rotate independently of each other, the lock can be opened even if another person on the other side of the door attempts to prevent the lock from being unlocked. This results in improved security. List of reference symbols

[0041] 1Lock nut 2aFirst connecting nut 2bSecond connecting nut 3Nut center part 4aStop projection of the first connecting nut 4bStop projection of the second connecting nut 5Stop pin 5aFirst stop element 5bSecond stop element 6aFirst bearing disc 6bSecond bearing disc 7aProtrusion of the first connecting nut 7bProtrusion of the first connecting nut 8aConnecting rod 9aFirst return spring 10Lock latch 11Control latch 12Bolt 13Lock

Claims

1. Lock nut (1), in particular for bidirectionally accessible escape doors, comprising a first connecting nut (1a), a nut center part (3) and a second connecting nut (2b), wherein the first connecting nut (2a), the second connecting nut (2b) and the nut center part (3) are rotatably mounted about a common axis of rotation, wherein the first connecting nut (2a) has a stop projection (4a) and the nut center part (3) has a first stop element (5a) which is assigned to the stop projection (4a) of the first connecting nut (2a), and wherein the second connecting nut (2b) has a stop projection (4b) and the nut center part (3) has a second stop element (5b) which is assigned to the stop projection (4b) of the second connecting nut (2b), characterized by thatthe first connecting nut (2a), the nut center part (3) and the second connecting nut (2b) are mounted in such a way that a rotation of the first connecting nut (2a) causes a rotation of the nut center part (3), wherein the second connecting nut (2b) remains at rest, and that a rotation of the second connecting nut (2b) causes a rotation of the nut center part (3), wherein the first connecting nut (2a) remains at rest.

2. Lock nut according to claim 1, characterized by thatupon rotation of the first connecting nut (2a) in the opening direction, the stop projection (4a) of the first connecting nut (2a) comes into contact with or is in contact with the first stop element (5a), wherein the first stop element (5a) acts as a driver and the nut center part (3) is rotated together with the first connecting nut (2a), wherein upon rotation of the first connecting nut (2a), the stop projection (4b) of the second connecting nut (2b) moves away from the second stop element (5b) and a gap is formed between the stop projection (4b) of the second connecting nut (2b) and the second stop element (5b), in particular that the gap increases with increasing angle of rotation of the first connecting nut (2a).

3. Lock nut according to claim 1 or 2, characterized by thatupon rotation of the second connecting nut (2b) in the opening direction, the stop projection (4b) of the second connecting nut (2b) comes into contact with or is in contact with the second stop element (5b), wherein the second stop element (5b) acts as a driver and the nut center part (3) is rotated together with the second connecting nut (2b), wherein upon rotation of the second connecting nut (2b), the stop projection (4a) of the first connecting nut (2a) moves away from the first stop element (5a) and a gap is formed between the stop projection (4a) of the first connecting nut (2a) and the second stop element (5a), in particular that the gap increases with increasing angle of rotation of the second connecting nut (2b).

4. Lock nut (1) according to one of claims 1 or 2, characterized by thatthe nut center part (3) is plate-shaped and the nut center part (3) has a bore in its peripheral region into which a stop pin (5c) is inserted, wherein the stop pin (5c) passes through the bore and one of the two ends of the stop pin (5c) serves as the first stop element (5a) and the other of the two ends of the stop pin (5c) serves as the second stop element (5b), or wherein the first stop element (5a) is fastened to one of the two ends of the stop pin (5c) and the second stop element (5b) is fastened to the other of the two ends of the pin.

5. Lock nut (1) according to claim 3, characterized by that the bore is designed as a threaded bore, and that the stop pin (5c) is designed as a threaded pin, and that the first stop element (5a) is designed as a first nut and the second stop element (5b) is designed as a second nut.

6. Lock nut (1) according to claim 4, characterized by that the first nut and the second nut are each designed as round nuts.

7. Lock nut (1) according to one of claims 4 or 5, characterized by that the first stop projection (4a) has an outer contour that is complementary to the outer contour of the first nut, and that the second stop projection (4b) has an outer contour that is complementary to the second outer contour of the second nut.

8. Lock nut (1) according to one of claims 4 to 6, characterized by that the first nut and the second nut are identical.

9. Mortise lock, wherein the mortise lock (13) has a lock nut (1) according to one of claims 1 to 8.

10. Mortise lock according to claim 8, characterized by that the mortise lock (13) has a tilt latch or a roller latch.

11. Mortise lock according to one of claims 8 or 9, characterized by thatthe lock nut (1) has a first bearing disc (6a) and a second bearing disc (6b), wherein the first bearing disc (6a) is assigned to the first connecting nut (2a) and the second bearing disc (6b) is assigned to the second connecting nut (2b), wherein each of the two bearing discs (6a, 6b) has an annular projection which cooperates with a corresponding recess in a lock cover of the mortise lock (13) or with a corresponding recess in a lock base of the mortise lock (13).

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