Locking device with a crank driven by plate lock cylinders

Abstract

In summary, the invention relates to a locking device (10) for displacing a lock bolt (30), which has an outer locking cylinder (14), in particular an outer Scandinavian oval locking cylinder (14), and an inner locking cylinder (16), in particular an inner Scandinavian oval locking cylinder (16). Furthermore, the locking device (10) has a lock case (12), the lock bolt (30), and an at least two-part crank (60). The crank (60) has a first and a second crank element (32, 34), which can be used independently of one another to displace the lock bolt (30) from a release position to a blocking position and vice versa. The first crank element (32) is arranged in a rotationally fixed manner on a first driver plate (52) of the outer locking cylinder (14), while the second crank element (34) is arranged in a rotationally fixed manner on a second driver plate (54) of the inner locking cylinder (16).To move the lock bolt (30), a key (18) must be inserted into a key receptacle (20) of the respective locking cylinder (14, 16). Furthermore, the invention relates to a method for carrying out a locking operation, in particular of the aforementioned locking device (10).

Description

Background of the invention

[0001] The invention relates to a locking device in which an outer locking cylinder with driver plates and an inner locking cylinder with driver plates can be used independently of one another with the aid of a suitable key to move a lock bolt from a release position to a blocking position and vice versa. The invention further relates to a method for actuating a locking device.

[0002] Locking devices for windows and / or doors can have various mechanisms, which rely on different locking cylinder designs. Locking cylinders are often classified according to their external shape. In this way, a distinction can be made between profile cylinders, round cylinders, and oval cylinders. Each locking cylinder class can, in turn, be available in different designs, which may overlap in function and handling with designs of other classes. Depending on the design, different advantages can arise, for example, with regard to burglar resistance, ease of installation, handling, robustness, or emergency and danger functions.

[0003] In particular, locking cylinders with a locking lug built into the cylinder, which transfers key movement directly or indirectly to the lock bolt, are widely used in modern locking devices. This is often the case, for example, with common profile locking cylinders.

[0004] In the context of the invention, the locking devices disclosed in the following publications can be cited in particular to illustrate the prior art: DE 44 22 094 A1 discloses a lock for locking and unlocking doors, which lock has two profile locking cylinder cores, the locking lugs of which can be used independently of one another to move a lock bolt.

[0005] DE 27 52 089 A1 discloses a lock which has a profile locking cylinder with a first locking nose, wherein in one embodiment of the invention the profile locking cylinder has a second locking nose which is independent of the first locking nose or can be switched off.

[0006] DE 195 18 491 A1 discloses a profile locking cylinder having at least two locking lugs, which are preferably axially spaced along the longitudinal axis of the profile locking cylinder. At least one of the at least two locking lugs is preferably divided into two independently operable locking lug halves.

[0007] EP 3 929 380 A1 describes a locking cylinder with a locking nose, preferably designed as a profile locking cylinder, which is highly robust against burglary attempts.

[0008] DE 1 024 842 A discloses a lock which has two round locking cylinders connected to each other via a tenon connection and with offset end parts, the locking lugs of which can be used independently of each other to move a lock bolt.

[0009] DE 36 17 217 C2 discloses a security lock which has two locking cylinders, the cores of which can each come into operative connection via coupling members with a driver which has a locking nose.

[0010] A design that differs from the locking cylinders listed above, although is known from the prior art, are locking cylinders that have a driver plate on their rear side that protrudes axially in their longitudinal direction and is aligned with a key receptacle on their front side. This is the case, for example, with well-known Scandinavian oval locking cylinders. Such a locking device often has an outer and an inner locking cylinder to enable the locking device to be operated from both the outside and the inside of the window or door. The outer and inner locking cylinders are usually connected to one another using screws, with the screw heads often resting on the front of the inner locking cylinder and the screw threads being screwed into the back of the outer locking cylinder.

[0011] The respective driver plates of the locking cylinders are positioned opposite each other, whereby the locking device must have a mechanism by means of which a locking operation can be carried out by turning one of the driver plates.

[0012] It is known from the prior art that this mechanism can be achieved using a one-piece crank handle with an hourglass-shaped recess into which both drive plates engage. The crank handle, in turn, has a locking lug for directly or indirectly moving the lock bolt. In a common embodiment, the lock bolt is located below the crank handle.

[0013] By engaging both drive plates in the recess of the switching crank, it is possible to trigger a closing process by rotating one drive plate by 90°, while the switching crank moves around the second, fixed drive plate during an idle stroke. Due to the special shape of the recess, the movement of the switching crank and thus the movement of the rotated drive plate is limited after a rotation angle of 90° by a stop against the opposite fixed drive plate.

[0014] To subsequently remove the key from the key holder, it is necessary to return the key holder and thus the rotated driver plate to a neutral position by turning the key back. The rotated driver plate then travels through the idle stroke of the switching crank.

[0015] If the lock bolt is already in a desired position due to a user's ignorance, when the key is turned only the relevant driver plate is moved in the idle stroke of the switching crank until it hits the crank after a rotation angle of 90°.

[0016] As a result, after turning the key, a user can be sure that the lock bolt is in the position corresponding to the direction of rotation, but he cannot deduce from the key movement alone whether he has actually triggered a locking process or whether the lock bolt was already in the desired position.

[0017] Furthermore, the positioning of the lock bolt below the crank when locking and unlocking such a locking device requires a key rotation direction that may seem counterintuitive to users accustomed to other common locking devices. In extreme cases, this can lead to a user who is unfamiliar with the locking device and who does not obtain or receive further information about the lock bolt position unknowingly leaving the locking device in its unlocked position after attempting to lock it. (For clarification, see also Fig. 4 .) Object of the invention

[0018] It is therefore an object of the invention to provide a method and a device in which an intuitive displacement of a lock bolt can be achieved using an outer locking cylinder with driver plates and an inner locking cylinder with driver plates. Description of the invention

[0019] This object is achieved according to the invention by a locking device according to claim 1 and a method according to claim 15. The subclaims give preferred embodiments.

[0020] The object of the invention is thus achieved by a locking device in which an outer locking cylinder with driver plates and an inner locking cylinder with driver plates interact with an at least two-part crank for moving a lock bolt. A first crank element is arranged in a rotationally fixed manner on the driver plate of the outer locking cylinder and a second crank element is arranged in a rotationally fixed manner on the driver plate of the inner locking cylinder, wherein the crank elements are arranged together with the lock bolt in a lock case. After inserting a key into a key receptacle of the respective locking cylinder in its neutral position, the respective driver plate can be rotated together with the corresponding crank element to move the lock bolt. The crank elements can be rotated independently of one another.In its end positions, the lock bolt assumes a release position or a blocking position.

[0021] The terms "top", "bottom", "inside", "outside" and the like refer to the assembled state of the locking device.

[0022] The locking cylinders are preferably Scandinavian oval locking cylinders, which, in accordance with their well-known design, each have a driver plate on their back.

[0023] Preferably, the driver plates are cuboid-shaped and arranged in a form-fitting manner with as little play as possible in a slot-shaped recess of the crank element assigned to them.

[0024] The crank elements preferably each have a locking lug, whereby these locking lugs can be used independently of one another to move the lock bolt. A locking operation is only possible if the position of the lock bolt matches the intended direction of rotation of the key and the lock bolt is not otherwise blocked. If this is not the case, the respective locking lug will strike the stuck lock bolt, thus preventing the key from turning.

[0025] To move the lock bolt, the respective locking lug engages, preferably during its circular path performed by the key rotation, into a trapezoidal or parabolic recess in the lock bolt. The shape of the recess ensures that the locking lug can move the lock bolt and then extend out of the recess to return to its neutral position.

[0026] Due to a preferred arrangement of the lock bolt above the crank elements, a direction of rotation is provided when locking and unlocking the locking device, which corresponds to the direction of rotation of a classic profile cylinder lock.

[0027] The lock bolt can be secured in its release position as well as in its blocking position to prevent accidental movement and increase security against burglary. This security can preferably be achieved via a snap-in connection, with a spring-loaded pin arranged on the lock bolt, which can snap into a release or blocking recess on the lock case. In particular, the snap-in connection can be designed such that the securing resistance for moving the lock bolt can be overcome during key rotation. It is also possible to arrange the pin on the lock case and the release and blocking recesses on the lock bolt.

[0028] The crank elements are preferably arranged next to one another, forming the crank. The crank elements can rotate independently of one another. A low-wear, low-maintenance plain bearing is preferably used.

[0029] Inserting and removing the key is generally only possible when the locking cylinder or its key receptacle is in the neutral position. For this purpose, a corresponding locking device can be included in the locking cylinder's mechanism. The rotationally fixed connection of the respective key receptacle to the respective driver plate, as well as the driver plates to the crank elements, determines their respective neutral positions. Therefore, each of the aforementioned components has a precisely defined neutral position over the area of ​​a full circle. Therefore, if the key is to be inserted, followed by moving the lock bolt and then removed, the key must be rotated 360° in the key receptacle.

[0030] If the key is turned further, after a further rotation of approximately 50°, the locking lug may strike the lock bolt, thus blocking the rotation. The same thing happens if the key is initially overturned. (Initial overturning refers to attempting to lock or unlock while the lock bolt is already in the corresponding position.)

[0031] It is well known that, particularly in door locking devices, it is often possible to move the lock bolt by a partial distance by turning the key several times in the same direction. By appropriately designing the lock bolt recess, this functionality can be easily implemented. This extends the key's possible rotation range by at least one full circle.

[0032] One possible application of the locking device shown here is to block or release a drive rod using the lock bolt, whereby the drive rod can be used to directly or indirectly lock a sash of a window or door to a fixed frame.

[0033] A gear can be used to move the drive rod. If the locking device's deadbolt is in its release position, the gear can also be used to move the drive rod into a position where it prevents the lock bolt from moving into the locked position. A user can thus also directly determine the drive rod's position by turning the key, since an attempt to lock the device results in a blockage of rotation after a rotation angle of approximately 180°. The locking lug engages the recess in the lock bolt, but the bolt cannot be moved.

[0034] The object of the invention is also achieved by a method comprising a locking process of the locking device described above, wherein a key is inserted into the key receptacle of the outer locking cylinder or the inner locking cylinder, the lock bolt is moved from the blocking position to the release position or vice versa, and the key is subsequently removed from the key receptacle. The key is rotated 360°, with the rotated components of the locking device remaining in their neutral position at the beginning and end of the process.

[0035] The method according to the invention is preferably carried out with a closing device described here.

[0036] Further advantages of the invention will become apparent from the description and the drawings. Likewise, the above-mentioned and further-described features can be used individually or in combinations according to the invention. The embodiments shown and described are not intended to be exhaustive, but rather are exemplary in nature for describing the invention. Brief description of the drawings

[0037] They show: Fig. 1 is an isometric view of a locking device arranged on a fitting, which has a lock case and locking cylinder, here in the form of a Scandinavian oval locking cylinder, with a key inserted into one of the locking cylinders; Fig. 2 is an exploded view of the lock case with a view of a lock bolt, a two-part crank, and a two-part spring element; Fig. 3 is an isometric, partially sectioned view of the locking cylinder, the key, and the two-part crank in the assembled state; Fig. 4 is an isometric view of part of a locking device known from the prior art, which has Scandinavian oval locking cylinders and a one-part switching crank; Fig. 5 is an isometric sectional view of the lock case and the components located therein, as well as the fitting and a drive rod; Fig.6 an isometric, partially sectioned view of a part of the lock case and the crank and the lock bolt in its release position, with the drive rod in a position that allows the lock bolt to be transferred to its blocking position; Fig. 7 a sectioned side view of the device shown in . Fig. 6 shown components in a time sequence during the execution of a locking process, including the overturning of a crank element until it strikes the lock bolt; Fig. 8 an isometric view of the locking device from Fig. 1 with the additional representation of a gear, which serves to move the drive rod, as well as a section of a frame of a window or a door and a section of a wing; Fig. 9 an isometric, partially sectioned view of the lock case, analogous to Fig. 6in which the drive rod is in a position that prevents the lock bolt from being moved into its blocking position. Detailed description of the invention and drawing

[0038] Fig. 1 shows a locking device 10, which has a lock case 12, an external locking cylinder 14 and an inner locking cylinder 16 The locking cylinders 14, 16 are shown here in the form of Scandinavian oval locking cylinders.

[0039] A key 18 is in a key holder 20 of the inner locking cylinder 16. The inner locking cylinder 16 is connected to the outer locking cylinder 14 via a first connecting element 22a and a second connecting element 22bconnected, wherein the two connecting elements in the illustrated embodiment are screws, in particular hexagon socket cylinder head screws, which are guided through the inner locking cylinder 16 and the lock case 12 and screwed into the back of the outer locking cylinder 14.

[0040] The locking device 10 is on a wing 80 (see Fig. 8 ) of a window or door 78 (see Fig. 8 ) arranged. In Fig. 1 For better clarity, only one fitting is required for the arrangement 24 of wing 80 (see Fig. 8 ) is shown.

[0041] Fig. 2 shows an exploded view of the lock case 12, which has a first half shell 26 and a second half shell 28 wherein a lock bolt located in the lock case 12 30, a first crank element 32 and a second crank element 34and a two-part spring element 36 are visible. The spring element 36 has a spring 38 and a pin 40 and serves to create a locking connection with the purpose of securing the lock bolt 30 in a blocking position or a release position. On the first half-shell 26, a release recess is provided as a counterpart to the pin 40. 72a (see Fig. 5 ) and a blocking trough 72b (see Fig. 5 ). The lock bolt 30 has a receptacle 41 in which the spring 38 and the shaft of the pin 40 can be arranged.

[0042] The first crank element 32 has a first locking lug 42 and the second crank element 34 has a second locking lug 44The locking lugs 42, 44 serve to displace the lock bolt 30 while overcoming the securing resistance exerted by the spring element 36 within the framework of the locking connection. The locking lugs 42, 44 can be used to displace the lock bolt 30 into a, in particular parabolic, recess. 46 engage in the lock bolt 30. In the illustration, the crank elements 32, 34 are each shown in their neutral position. The locking lugs 42, 44 point downward in the illustrated embodiment.

[0043] The lock bolt 30 is arranged above the crank elements 32, 34. Furthermore, the crank elements 32, 34 each have a slot-shaped recess 48, 50 into which a first and a second driver plate 52, 54 (see Fig. 3 ) of the respective locking cylinder 14, 16 (see Fig. 1 ) to create a non-rotatable connection.

[0044] The figure also shows that the half-shells 26, 28 of the lock case 12 each have two through-holes 56a-d for the passage of the connecting elements 22a, 22b (see Fig. 1 ) the locking cylinders 14, 16 (see Fig. 1 ) and a through hole 58a, 58b to establish the connection between the crank elements 32, 34 and the locking cylinders 14, 16 (see Fig. 1 ).

[0045] Fig. 3 shows the locking cylinders 14, 16 connected via the connecting elements 22a, 22b. The lock case 12 (see Fig. 1 and 2 ) is hidden for clarity. The crank elements 32, 34 are connected to form a crank 60rotatably arranged relative to one another. The crank 60 is shown in section to illustrate the engagement of the driver plates 52, 54 in the respective crank elements 32, 34 as well as the arrangement of the crank elements 32, 34 relative to one another. In the present exemplary embodiment, a circular relative movement of the crank elements 32, 34 to one another is enabled by a sliding bearing, while each crank element 32, 34 is connected in a rotationally fixed manner to its respective cuboid driver plate 52, 54 via a positive connection.

[0046] Key 18 is analogous to the representation in Fig. 1inserted into the key receptacle 20 of the inner locking cylinder 16. When the key 18 is turned, its key receptacle 20 rotates along with the second driver plate 54 and the second crank element 34. The first driver plate 52 and the first crank element 32 do not change their position when the key 18 is turned in the illustrated configuration, since there is no key in a key receptacle (not visible here) of the outer locking cylinder 14. When the key 18 is turned, it is locked via a locking device 61 in the key receptacle 20. This ensures that the key 18 can only be removed or inserted in the neutral position of the locking cylinder 16.

[0047] Fig. 4 shows part of a locking device 62, which is known from the prior art. The inner locking cylinder 16 (see Fig. 1 and 3) is hidden for clarity. The first driver plate 52 of the outer locking cylinder 14 and the second driver plate 54 (see Fig. 3 ) of the inner locking cylinder 16 (see Fig. 1 and 3 ) engage in an hourglass-shaped recess 64 a one-piece gear crank 66 The drive plates 52, 54 are not connected to the switching crank 66 in a rotationally fixed manner, but can, depending on the selected direction of rotation, perform a free rotation of up to 90° in an idle stroke of the hourglass-shaped recess 64, without causing any movement of the switching crank 66. A lock bolt 68, which is similar in form and function to the lock bolt 30 belonging to the invention, is arranged below the switching crank 66. This lock bolt 68 is connected via a locking lug 70 the switching crank 66 is movable.

[0048] In the illustrated state, the lock bolt 68 is in the release position. By rotating the driver plate 52 by 90° (counterclockwise in the illustrated view), the lock bolt 68 can be moved into the blocking position. A rotation of the driver plate 52 and the switching crank 66 beyond 90° is permitted provided that the inner locking cylinder 16 (see Fig. 1 and 3 ) no key 18 (see Fig. 1 and 3 ), from the opposite driver plate 54 (see Fig. 3 ) prevented.

[0049] To remove the key 18 (see Fig. 1 and 3), due to the locking device 61, it is necessary to return the driver plate 52 to its neutral position by rotating it back 90°. During this reverse rotation of the driver plate 52 during the idle stroke of the switching crank 66 (clockwise in the view shown), it can move through an angular range of 90°, while the switching crank remains in the position corresponding to the locking position of the lock bolt. In this case, the lock bolt 68 is not moved, and the key can be removed.

[0050] A user who has no prior information about the current state of the locking device 62 therefore generally does not know whether he will be able to open the door by turning the key 18 (see Fig. 1 and 3 ) performs a locking operation or an idle stroke if the lock bolt 68 is already in the desired position. In both cases, the key can be turned 90°.

[0051] Out of Fig. 4 It is further apparent that due to the arrangement of the lock bolt 68 below the switching crank 66, the direction of rotation of the key for moving the lock bolt 68 is exactly opposite to the direction of rotation of the key within the scope of a partial aspect of the invention.

[0052] Fig. 5 shows a sectional view of the lock case 12 as well as the lock bolt 30 and the spring element 36 located therein. The recess 46 in the lock bolt 30 indicates that the lock case 12 is shown from below. The lock bolt 30 is in the release position, which is secured by the locking connection of the pin 40 with the release recess 72a in the first half-shell 26. The blocking recess 72b remains free in this case. Also shown in section are the fitting 24 and a drive rod. 74,which in particular runs through the lock case 12 and into which the lock bolt 30 engages as soon as it is moved into the blocking position.

[0053] Fig. 6 shows the second half-shell 28 arranged on the fitting 24. The first crank element 32 and the second crank element 34, as well as the lock bolt 30, are arranged in the second half-shell 28, with the crank elements 32, 34 in their neutral position and the lock bolt 30 in the release position. The drive rod 74 is in a position that allows the lock bolt 30 to be moved into its blocking position.

[0054] Fig. 7 shows the components from Fig. 6 , wherein the change in the positions of the first crank element 32 and the lock bolt 30 is depicted at discrete intervals over the course of a locking process.

[0055] Figure a) is considered the initial state, in which the lock bolt 30 is in the release position and the first crank element 32 is in its neutral position. In this state, in the present application example, the key 18 (see Fig. 1 and 3 ) into the outer locking cylinder 14 (see Fig. 1 , 3 and 4 ) and a rotary movement is initiated to move the lock bolt 30 into its blocking position. The second crank element 34 (see Fig. 2 , 3 and 6 ) remains in its neutral position.

[0056] Figures b) and c) illustrate the engagement of the first locking lug 42 of the first crank element 32 into the recess 46 of the lock bolt 30 and the displacement of the lock bolt 30 into its blocking position.

[0057] Figures d) and e) show the extension of the first locking lug 42 from the recess 46 of the lock bolt 30 and the return to the neutral position after completion of a full circular movement.

[0058] In the state shown in Figure e), the key 18 (see Fig. 1 and 3 ) can be removed. In the illustrated application example, however, the first crank element 32 is over-rotated by approximately 50° until the first locking lug 42 strikes the lock bolt 30. This is shown in Figure f). The striking in this position signals to a user that an end position has been reached and that a locking process was carried out during actuation.

[0059] Out of Fig. 7It can further be deduced that in a case in which the user, starting from the state shown in Figure a), had initiated a turning process opposite to the direction of rotation shown here, the first locking lug 42 would have struck the lock bolt 30 after a rotation of approximately 50°. This provides the user with clear information about the position of the lock bolt and, in particular, whether a locking process took place during the turning, even when initially over-turning.

[0060] Fig. 8 shows the locking device 10, as it is also shown in Fig. 1 In addition, a gear arranged on the same fitting 24 76 The gear 76 is used to move the drive rod 74 (see Fig. 5 and 6 ). By moving the drive rod 74 (see Fig. 5 and 6) can cause a release or blocking of a relative movement of a wing of the window or door 78 to the frame 82. The window or door 78, which 82 and the wing 80 are each shown in the form of a section for the purpose of better clarity.

[0061] Fig. 9 shows, in analogy to Fig. 6 , a view of the second half-shell 28, which is arranged on the fitting 24, together with the lock bolt 30 arranged in the half-shell 28 and the crank elements 32, 34. In contrast to Fig. 6, the drive rod 74 is in this case in a position which prevents the displacement of the lock bolt 30 into its blocking position. In this case, the user can only turn the crank elements 32, 34 by approximately 180° during a desired locking operation before a blockage of the crank elements 32, 34 occurs. Thus, the user has the option of operating the locking device 10 (see Fig. 1 ) also provides clear information on the position of the drive rod 74. Conversely, this means that if the lock bolt 30 is in its blocking position, the gear 76 (see Fig. 8 ) cannot be fully served.

[0062] Taking a summary of all the figures of the drawing, the invention relates to a locking device 10 for displacing a lock bolt 30, which has an outer locking cylinder 14, in particular an outer Scandinavian oval locking cylinder 14, and an inner locking cylinder 16, in particular an inner Scandinavian oval locking cylinder 16. Furthermore, the locking device 10 has a lock case 12, the lock bolt 30, and an at least two-part crank 60. The crank 60 has a first and a second crank element 32, 34, which can be used independently of one another to displace the lock bolt 30 from a release position to a blocking position and vice versa.The first crank element 32 is arranged in a rotationally fixed manner on a first driver plate 52 of the outer locking cylinder 14, while the second crank element 34 is arranged in a rotationally fixed manner on a second driver plate 54 of the inner locking cylinder 16. To move the lock bolt 30, a key 18 must be inserted into a key receptacle 20 of the respective locking cylinder 14, 16. Furthermore, the invention relates to a method for carrying out a locking operation, in particular of the aforementioned locking device 10. List of reference symbols

[0063] 10 Locking device 12 Lock case 14 Outer locking cylinder 16 Inner locking cylinder 18 Key 20 Key receptacle 22a First connecting element 22b Second connecting element 24 Fitting 26 First half-shell 28 Second half-shell 30 Lock bolt 32 First crank element 34 Second crank element 36 Spring element 38 Spring 40 Pin 41 Receptacle 42 First locking lug 44 Second locking lug 46 Recess (lock bolt) 48 Recess (first crank element) 50 Recess (second crank element) 52 First driver plate 54 Second driver plate 56a Passage for connecting element (first half-shell) 56b Passage for connecting element (first half-shell) 56c Passage for connecting element (second half-shell) 56d Passage for connecting element (second half-shell) 58a Passage for the outer locking cylinder (first half-shell) 58b Passage for the inner locking cylinder (second half-shell) 60Crank 61Locking device 62Locking device (state of the art) 64Hourglass-shaped recess66Crank handle 68Lock bolt (state of the art) 70Locking lug (crank handle) 72aRelease recess 72bBlocking recess 74Drive rod 76Gear 78Window / door 80Sash 82Frame

Claims

1. A locking device (10) for displacing a lock bolt (30), comprising: • an outer lock cylinder (14) having on its rear side a first driver plate (52) projecting axially in its longitudinal direction, which is aligned with a first key receptacle (20) on the front side of the outer lock cylinder (14); and • an inner lock cylinder (16) having on its rear side a second driver plate (54) projecting axially in its longitudinal direction, which is aligned with a second key receptacle on the front side of the inner lock cylinder (16); wherein a key (18) can be inserted into each of the lock cylinders (14, 16) in a neutral position of the lock cylinders (14, 16); and • a lock case (12) in which the lock bolt (30) is arranged to be displaceable by rotating one of the keys (18) from a blocking position to a release position or vice versa, characterized in thatan at least two-part crank (60) is arranged in the lock case (12), wherein a first crank element (32) and a second crank element (34) can be used independently of one another to move the lock bolt (30), and wherein the first crank element (32) is connected in a rotationally fixed manner to the first driver plate (52) of the outer locking cylinder (14) and the second crank element (34) is connected in a rotationally fixed manner to the second driver plate (54) of the inner locking cylinder (16).

2. Locking device (10) according to claim 1, wherein the driver plates (52, 54) are cuboid-shaped, wherein the first driver plate (52) is arranged without play in a slot-shaped recess (48) of the first crank element (32) and the second driver plate (54) is arranged without play in a slot-shaped recess (50) of the second crank element (34).

3. Locking device (10) according to one of the preceding claims, in which the first crank element (32) has a first locking lug (42) and / or the second crank element (34) has a second locking lug (44), wherein the locking lug(s) (42, 44) serve to displace the lock bolt (30).

4. Locking device (10) according to claim 3, wherein the first locking lug (42) and / or the second locking lug (44) is / are designed to strike the lock bolt (30).

5. Locking device (10) according to claim 3 or 4, wherein the lock bolt (30) has a parabolic or trapezoidal recess (46) into which the locking lug(s) (42, 44) engage in the course of their trajectory upon rotation of the driver plate(s) (52, 54) in order to displace the lock bolt (30) and to subsequently extend out of the recess (46) again.

6. Locking device (10) according to one of the preceding claims, wherein the lock bolt (30) is arranged above the crank (60).

7. Locking device (10) according to one of the preceding claims, in which a latching connection via a spring element (36) between the lock bolt (30) and the lock case (12) serves to secure the lock bolt (30) in its blocking position and / or release position.

8. Locking device (10) according to one of the preceding claims, in which the crank elements (32, 34) are arranged rotatably relative to one another and the mobility of the crank elements (32, 34) relative to one another is ensured by a sliding bearing.

9. Locking device (10) according to one of the preceding claims, in which at least one of the locking cylinders (14, 16) has a locking device (61) which only allows the insertion and removal of the key (18) into the respective key receptacle (20) when the respective locking cylinder (14, 16) is in the neutral position.

10. Locking device (10) according to claim 9, wherein, in the event that the locking cylinder (14, 16) is in the neutral position, its driver plate (52, 54) can be rotated together with the key (18) through 360° after the key (18) has been inserted until the neutral position is reached again, wherein during this rotation process the lock bolt (30) is transferred from the release position to the blocking position or vice versa.

11. Locking device (10) according to one of the preceding claims, in which an over-rotation of the respective crank element (32, 34) from its neutral position beyond the corresponding blocking or release position of the lock bolt (30) is only possible over an angular range of maximum 60° before the crank element (32, 34) is blocked by striking the lock bolt (30).

12. Locking device (10) according to one of the preceding claims, wherein the locking device (10) has a drive rod (74), and wherein the lock bolt (30) can be used to block or release the drive rod (74).

13. Window or door (78) with a fixed frame (82) and a sash (80) movable relative to the fixed frame (82) and a locking device (10) according to one of the preceding claims, wherein the locking device (10) is designed for the indirect or direct locking of the sash (80) to the fixed frame (82).

14. Window or door (78) according to claim 13 with a gear (76) for moving the drive rod (74).

15. Method for actuating a locking device (10), comprising: • inserting a key (18) into a key receptacle (20) of a locking cylinder (14, 16) which has driver plates (52, 54) while the locking cylinder (14, 16) is in its neutral position, • rotating the key (18) through 360°, whereby a lock bolt (30) is moved from a release position to a blocking position or vice versa, and • subsequently removing the key (18), whereby the locking cylinder (14, 16) is again in its neutral position.

Images