Locking device

Abstract

The invention relates to a locking device (50) for locking a door (30) against a door frame (40) with a rotary-tension lock (1) which has a rotatable and axially movable locking tongue (2), and an actuating unit for moving the locking tongue (2) between a locking position (V) and an unlocking position (E), wherein the actuating unit is designed as an interchangeable locking cylinder (10).

Description

[0001] The invention relates to a locking device according to the preamble of claim 1.

[0002] Corresponding locking mechanisms are known in a wide variety of designs and serve to lock a door, which is usually pivotable, against a fixed frame. The term "door" here refers not only to doors in the strict sense, but also to windows, flaps, hatches, or other, especially pivotable, locking elements.

[0003] Very simple locking devices can, for example, be latches with a locking tongue that rotates back and forth between an unlocked and a locked position around an actuating axis. When the locking tongue is in the locked position, it engages the door frame or a frame-side retaining element, thus securing the door to the frame and preventing it from being opened. To open the door again, the locking tongue must first be rotated back to the unlocked position.

[0004] As a further development of these simple latches, so-called rotary-tension latches exist, whose locking tongues not only rotate back and forth but can also move axially. This axial movement allows the door to be reliably locked against the frame, and in the locked position, it can also be pressed firmly against the frame. This compresses a door seal located between the door and the door frame, thus preventing gas exchange between the interior and exterior. Furthermore, pressing the door against the frame ensures that it is in a precisely defined position and therefore cannot rattle. Such a rotary-tension latch is described, for example, in DE 20 2010 012 699 U1.

[0005] To move the locking tongue and thus actuate the rotary latch, the latch is equipped with an actuating unit, which can be, for example, a pivot lever. A rotary movement of the pivot lever then allows the locking tongue to be both rotated and moved axially.

[0006] It is often necessary to additionally secure the door with a cylinder lock to prevent unauthorized unlocking. The cylinder lock can, for example, be used to block the movement of the swing handle, so that to open the door, the cylinder lock must first be unlocked, and then the swing handle and, consequently, the locking bolt must be moved. While this combination of swing handle and cylinder lock has proven effective and is used in practice in various configurations, locking and unlocking the door requires operating both the cylinder lock and the rotary latch mechanism.

[0007] WO 00 / 49251 A1 relates to a key-operated lock with a housing containing a locking plug, a motion control sleeve, and a sleeve-like cam. The cam rotates with the locking plug, while the motion control sleeve is stationary. The cam has at least one cam slot, and the motion control sleeve has at least one motion control slot. A shaft extends outward from the housing and has at least one projection that engages with both the cam slot and the motion control slot. The cam slot and the motion control slot are configured such that the rotation of the locking plug imparts a sequence of rotary and axial movements to the shaft.A locking element attached to the shaft moves in a series of axial and rotational movements between a locked and an unlocked position to selectively secure a door, panel or similar in the closed position.

[0008] US Patent 6,041,627 A relates to a pull-up latch for securing one element to another, such as a cabinet door to a cabinet, wherein it is unlocked and locked by turning the latch handle in one direction or the other. When the door is in a locked position, turning in the unlocking direction first causes a spring-loaded element carrying a locking pawl to move axially inward and away from the engagement surface. The inward movement of the shaft is enabled by rotating a cam in the latch body to present downward-sloping cam surfaces of the second cam element. An adjustable locking pawl element is provided, which can be positioned to operate over a range of distances relative to the latch body.

[0009] Based on this, the invention aims to provide a locking device that enables simpler locking and unlocking.

[0010] This problem is solved in a locking device of the type mentioned above by the characterizing features of claim 1.

[0011] By designing the actuating unit as an interchangeable cylinder, the rotary latch can be operated via the cylinder itself, thus moving the locking bolt directly through the cylinder. The cylinder therefore performs a dual function, serving both as the actuating unit and as protection against unauthorized unlocking. Advantageously, no additional actuating unit, such as a pivot lever, is required to move the locking bolt.

[0012] According to the invention, the lock cylinder has a locking bolt for moving the locking tongue, which can be rotated about an actuating axis by means of a suitable key. The locking tongue can thus only be moved by a suitable key, preventing unauthorized opening of the door. The lock cylinder can be coupled to the rotary latch so that the locking tongue can be moved by a rotational movement of the lock cylinder or the rotatable cylinder core of the lock cylinder. According to the invention, the locking bolt is designed as a radially projecting thumb that can be moved back and forth by a suitable key. The lock cylinder can be a standard, commercially available part.Therefore, different locking cylinders can have essentially identical locking bolts and can thus be used without further adjustment of the locking bolts.

[0013] Regarding the lock cylinder, it has proven advantageous for it to be designed as a profile half-cylinder. The profile half-cylinder can be operated with a key from one side, particularly from the outside of the door. For this purpose, the profile half-cylinder can have a keyhole accessible only from the outside. Operation from the other side is not possible with a profile half-cylinder, nor is it necessary. This is because the locking bolt is located on the inside of the door, which locks the door against the frame. Profile half-cylinders are standard components that do not require any modifications for use in the locking mechanism.

[0014] Regarding the movement of the locking tongue, it has proven advantageous if it is moved axially in a first angular range by a rotational movement of the locking bolt and rotated in a second angular range. The corresponding movements of the locking tongue are thus separated, and it is advantageous if the first and second angular ranges do not overlap. A superposition of the axial movement with the rotational movement would have the disadvantage that the locking tongue could scratch the frame.

[0015] It has also proven advantageous for the locking tongue to be rotatable between the unlocked position and a pre-locked position. In the unlocked position, the locking tongue cannot engage behind the frame, allowing the door to be opened. In the pre-locked position, the locking tongue can engage behind the frame, thus preventing the door from being opened. However, the door seal is not compressed in the pre-locked position, as the door is not pressed against the frame. The locked and pre-locked positions of the locking tongue therefore correspond to the positions of the locking tongue of a simple latch, which does not allow for any compression.

[0016] Further development suggests that the locking tongue should be axially movable back and forth between the pre-locked and locked positions. When the locking tongue is moved accordingly, the door is pressed against the frame, thereby compressing the door seal. The locking tongue is moved in the direction of the door and / or the lock cylinder.

[0017] According to an advantageous embodiment of the invention, it is proposed that the rotary locking device comprises a rotatable rotary clamping sleeve and a locking shaft connected to the locking tongue, wherein the rotary clamping sleeve has a cam guide and the locking shaft is guided in the cam guide to effect an axial displacement of the locking shaft when the rotary clamping sleeve rotates. This mechanism allows the locking shaft to be both rotated and axially movable when the rotary clamping sleeve rotates.

[0018] The rotary clamping sleeve can be mounted to rotate but be axially immovable. The locking shaft can be guided by a pin in the cam guide of the rotary clamping sleeve. At the end of the locking shaft opposite the pin, it can be detachably connected to the locking tongue. The locking tongue can thus rotate together with the locking shaft and also be movable in the axial direction. Furthermore, a fixed switching ring can be provided, which may have at least one control edge. The pin can bear against the control edge and thereby prevent rotation of the locking shaft. When the pin bears against the control edge, the locking shaft is moved only in the axial direction when the rotary clamping sleeve is rotated. If the locking shaft has been moved axially to such an extent that the pin no longer bears against the control edge, further rotation of the rotary clamping sleeve causes the locking shaft to rotate.This rotation allows the locking tongue to be turned back and forth between the unlocked position and the pre-locked position.

[0019] For the movement of the rotary clamping sleeve, it has proven advantageous for it to be rotatable around the lock cylinder. It is therefore possible for the rotary clamping sleeve to be coupled to the locking bolt and to rotate together with it around the actuating axis. This allows the rotary clamping sleeve to rotate when a suitable key is turned in the lock cylinder, thereby also rotating the locking tongue and moving it axially. The central axis of the rotary clamping sleeve can correspond to the actuating axis, resulting in a compact design. The rotary clamping sleeve can have an interface through which the locking bolt can interact with the rotary clamping sleeve and thus rotate it. The locking bolt is advantageously rotatable only together with the rotary clamping sleeve, but not relative to the rotary clamping sleeve.The rotary clamping sleeve can interact with the other elements of the rotary clamping fastener in the manner described above, although this is not strictly necessary.

[0020] According to the invention, the rotary locking device comprises a rotary clamping sleeve, the rotary clamping sleeve having a crank section via which it is rotaryally coupled to the locking bolt for the movement of the locking tongue. The crank section thus enables a connection between the rotary locking device and the locking cylinder, and the locking cylinder or the locking bolt of the locking cylinder can be rotaryally coupled to the rotary clamping sleeve. The crank section can extend radially with respect to the actuating axis of rotation and thus provide an interface away from the actuating axis of rotation. The crank section can have a bolt recess that is adapted to the locking bolt of the locking cylinder, ensuring reliable transmission of movement in both clockwise and counterclockwise directions. The bolt recess can be U-shaped.This enables a reliable, form-fitting connection with the locking bar.

[0021] To limit the rotation of the locking bolt, it has proven advantageous for the cylinder to have one, and preferably two, stop surfaces. These stop surfaces ensure that the locking bolt can only rotate to the extent that the locking tongue can move back and forth between the locked and unlocked positions. In practice, a range of motion of approximately 270 degrees has proven advantageous. It can be designed so that during a rotation within a first angular range of 180 degrees, the locking tongue does not rotate but only moves axially. During a movement within an angular range between 180 and 270 degrees, the locking tongue is advantageously not moved further axially but is then rotated into the unlocked position. At an angular position of 180 degrees, the locking tongue can thus be in the pre-locked position.The stop surfaces can be designed and arranged in such a way that the ball section rests against one of the two stop surfaces in each of the two end positions.

[0022] In a further development of the invention, it has proven advantageous to provide a housing that can be connected to the door, in which the rotary latch and the lock cylinder are jointly housed. The shared housing for the rotary latch and the lock cylinder allows for relatively simple installation of the entire locking device. The housing can be connected to the inside of the door, in particular by screws, so that the housing is not visible from the outside. For connection to the door, the housing can have a connecting flange and be connected to the door via this flange, in particular by a screw connection. To prevent gas exchange, the housing, and in particular the connecting flange, can be sealed against the door.

[0023] Furthermore, it has proven advantageous with regard to the housing if the rotary latch is secured within the housing via the locking cylinder. In this case, it is not necessary to fasten the rotary latch or its components directly within the housing. The locking cylinder can be fixed and connected to the housing using a mounting screw. This mounting screw can be designed as a transverse screw, extending perpendicular to the operating axis. To mount the locking device, the rotary latch can first be positioned within the housing without the locking tongue, so that one end of the locking shaft protrudes from the housing. The housing can be designed such that the rotary latch can only be inserted from one side.The end of the locking shaft protruding from the housing can then be connected to the locking tongue, which is located outside the housing. The lock cylinder can then be inserted into the housing and secured. Since the rotary locking mechanism or rotary locking sleeve is located behind the lock cylinder inside the housing, the lock cylinder can secure the rotary locking mechanism within the housing.

[0024] Regarding the mounting of the rotary locking mechanism within the housing, it has proven advantageous for the rotary locking sleeve to be rotatably mounted within the housing. Axial movement of the rotary locking sleeve can be prevented by the locking cylinder. A seal, for example in the form of an O-ring, can be provided to seal the rotary locking sleeve against the housing.

[0025] Furthermore, it has proven advantageous for the housing to have a first housing section for receiving the locking cylinder and a second housing section for receiving the rotary latch. The rotary latch and the locking cylinder can be arranged one behind the other within the housing. The second housing section can have an opening through which the locking shaft projects, allowing the locking tongue to be mounted on the protruding end of the locking shaft. The second housing section can be cylindrical, and the cylinder axis can coincide with the operating axis. The first housing section can be connected to the door, particularly to the inside of the door. The two housing sections can be integrally joined.The first housing section can have a larger diameter than the second housing section, so that the first housing section forms a shoulder against which the crank section of the rotary clamping sleeve rests and can slide off when the locking cylinder moves.

[0026] Furthermore, it has proven advantageous for the first housing section to have a diamond shape. The center of the diamond can lie on the operating axis, allowing the locking cylinder to be positioned centrally within the first housing section. The first housing section can have rounded edges, which has proven advantageous for installation. The diamond shape has the advantage of providing sufficient space in the corners of the connecting flange for drilling holes to connect the housing to the door. The connecting flange can therefore be rectangular.

[0027] According to an advantageous embodiment of the invention, a mounting adapter is proposed for mounting the locking cylinder in the housing. The mounting adapter allows the locking cylinder to be adapted to the housing or the first housing section, so that various, particularly commercially available, locking cylinders can be fitted to the housing. If the first housing section is diamond-shaped, the mounting adapter can also have a diamond-shaped outer contour to enable a positive fit within the first housing section. The mounting adapter can have a corresponding recess for receiving the locking cylinder, which is adapted to the geometric design of the locking cylinder. Therefore, different mounting adapters allow the use of differently designed locking cylinders without requiring any other modifications to the housing or the rotary latch.

[0028] Regarding the mounting adapter, it is advantageous if it is detachably connected to both the housing and the lock cylinder. This allows for easy replacement of the lock cylinder and the use of different cylinders. For installation, the mounting adapter is first inserted into the housing or the first housing section, and then the lock cylinder is positioned within the mounting adapter. The mounting adapter can be the same length as the first housing section, so that when positioned within the housing, it rests against the rear wall of the first housing section and is flush with the front edge.

[0029] For securing the lock cylinder and mounting adapter, it has proven advantageous if the lock cylinder and mounting adapter can be screwed to the housing together. This reduces the effort required for both installation and removal. The mounting screw can connect both the mounting adapter and the lock cylinder to the housing. The mounting screw can therefore extend through the housing, the mounting adapter, and the lock cylinder.

[0030] According to a further advantageous embodiment, the mounting adapter can fix the rotary locking mechanism axially within the housing. By connecting the mounting adapter to the housing, the rotary locking mechanism can be reliably fixed within the housing, eliminating the need for a separate connection between the rotary locking mechanism and the housing. The mounting adapter can rest against the rotary locking sleeve, thus preventing axial movement. The crank section of the rotary locking sleeve is then located between the mounting adapter on one side and the rear wall of the first housing section on the other. To allow the rotary locking sleeve to rotate around the actuating axis via the crank section, the mounting adapter has a recess to prevent obstruction of this movement. Consequently, the mounting adapter does not lie completely flush against the rear wall of the first housing section.

[0031] With regard to the aforementioned task, a door with a locking device for locking the door against a door frame is further proposed, wherein the locking device is designed in the manner described above. The advantages already described with regard to the locking device result.

[0032] Advantageously, the locking device or its housing is connected to the inside of the door, particularly by screws. The door can have a recess adapted to the size of the lock cylinder, so that only the lock cylinder is visible from the outside. This recess can also be covered by a cover, especially a hinged one. Since the dual function of the lock cylinder eliminates the need for a separate operating unit, further components on the outside of the door are unnecessary. However, it is also possible to equip the outside with a fixed handle to facilitate opening and closing the door.

[0033] Further advantages and details of the invention will be explained in more detail below using an exemplary embodiment. This will demonstrate: Fig. 1 A locking device in its assembled state in a perspective side view; Fig. 2a-c perspective views of the locking device in various installation situations; Fig. 3a-c perspective views of the locking device in various positions; Fig. 4a, b various exploded views of the locking device; Fig. 5 a horizontal sectional view of the locking device according to Fig. 1 Fig. 6a a view of a rotary latch arranged in a housing; Fig. 6b a vertical sectional view of the locking device according to Fig. 1 .

[0034] The presentation of Fig. 1 Figure 1 shows a locking device 50 for locking a door 30 against a door frame 40, so that the door 30 can no longer be moved relative to the door frame 40 when locked. The locking device 50 has a rotary-tension lock 1 with a rotatable and axially movable locking tongue 2, the construction and function of which are described in more detail below.

[0035] The twist-lock fastener is as shown in the illustration. Fig. 1 The housing 20 is mounted in a housing which can be connected to the back of a door 30 by means of screws via a connecting flange 24. The connecting flange 24 has a circumferential sealing lip that prevents gas exchange. Due to its mounting on the inside of the door, the housing 20 is located in the Fig. 2a bis 2c not recognizable, but only the locking cylinder 10, via which the locking tongue 2 can be moved to lock or unlock the door 30.

[0036] In the Fig. 2a und 2b A cover is shown which must first be folded up for operation, otherwise no key can be inserted into the lock cylinder 10 and therefore the locking tongue 2 cannot be moved. In the design of the Fig. 2b No corresponding cover is shown, so the lock cylinder 10 is directly accessible.

[0037] What about the Fig. 2a bis 2c However, it is noticeable that, apart from the locking cylinder 10, no further elements are required on the outside of the door 30 to lock or unlock it. This is because the locking cylinder 10 has a dual function. It not only ensures that the door cannot be opened or unlocked by an unauthorized person, but the locking cylinder 10 also functions as an operating unit, thus directly actuating and moving the locking bolt 2. A separate operating unit, such as a handle or a swing handle, is therefore unnecessary.

[0038] In the Fig. 3a bis 3c The locking device 50 is in accordance with Fig. 1 Shown from the other side. In the position according to Fig. 3a The locking device 50 is in the unlocked position E. In this position, the locking tongue 2 does not engage the door frame 40, and the door 30 can essentially pivot freely relative to the door frame 40. When the door 30 is closed and rests against the door frame 40, the locking tongue 2 can be turned into a pre-locked position R by rotating the cylinder core of the lock cylinder 10 with a suitable key around the operating axis B. Fig. 3b The cylinder core and the locking tongue 2 move in the same direction around the actuating axis of rotation B and are thus rotationally coupled. In the pre-locking position R, the locking tongue 2 engages behind the door frame 40, so that the door 30 can no longer be opened. In this position, however, the seal 41 located between the door 30 and the door frame 40 is not yet compressed, so that gas exchange between the inside and outside can occur. In addition, the door 30 may rattle or move slightly relative to the door frame 40.

[0039] To compress the seal 41 and thus prevent unwanted movement of the door 30 relative to the door frame 40, the door 30 can be pressed onto the door frame 40 or the seal 41. For this purpose, the locking tongue 2 is moved axially from the pre-locking position R towards the door 30 or the housing 20. The door 30 is pressed against the door frame 40 from the outside, and the locking tongue 2 from the inside, thereby compressing the seal 41 to a certain extent. The compression of the seal 41 is also in the Fig. 2a bis 2c This can be seen because the locking tongue 2 is in the locked position V. To reopen the door 30, the locking tongue 2 must first be moved from the locked position V to the pre-locked position R and then rotated around the actuating axis B back to the unlocked position E. This is done by rotating the cylinder core 13 of the locking cylinder 10 in the opposite direction.

[0040] Both the axial movement and the rotational movement of the locking tongue 2 are initiated by a rotational movement of the cylinder core 13. For example, if the locking tongue 2 is in the locked position, a rotational movement of the cylinder core 13 about the actuating axis B within a first angular range initially results in an axial movement of the locking tongue 2 until it reaches the pre-locking position R. For this movement, the cylinder core 13 can be rotated, for example, by 180 degrees. With a further movement of the cylinder core 13 within a second angular range, the locking tongue 2 rotates together with the cylinder core 13 until it reaches the unlocking position E. This is also the case when comparing the positions of the Fig. 3a und 3b As can be seen, the cylinder core 13 must be rotated by approximately 90 degrees. To lock or unlock the door 30, it is necessary to rotate the cylinder core 13 by approximately 270 degrees.

[0041] The mechanics of the rotary-locking fastener 1, which enables the various movements of the locking tongue 2, will be explained below using the exploded views of the Fig. 4a und 4b The locking cylinder 10 has a rotatable locking bolt 11 coupled to the cylinder core 13, which projects radially like a thumb and over which a rotary clamping sleeve 3 of the rotary-tension lock 1 can be rotated back and forth. In the axial direction, the rotary clamping sleeve 3 is fixedly mounted in the housing 20. As can be seen from the Fig. 4a As can be seen, the rotary clamping sleeve 3 has a cam guide 5 in which a pin 7 is guided, extending through the end of a locking shaft 4. At the other end, the locking shaft 4 is fixedly connected to the locking tongue 2 via a screw connection, so that an axial movement or a rotational movement of the locking shaft 4 leads to a corresponding movement of the locking tongue 2. The cam guide 5, arranged circumferentially on the cylindrical rotary clamping sleeve 3, serves to convert a rotational movement of the rotary clamping sleeve 3 initiated by the locking cylinder 10 into an axial movement of the locking shaft 4 and thus also an axial movement of the locking tongue 2 between the locked position V and the pre-locked position R.

[0042] A switching ring 6, which is fixedly mounted in the housing 20, is provided to control the movement of the locking shaft 4. The switching ring 6 allows a rotation of the rotary clamping sleeve 3 to be converted into an axial movement of the locking tongue 2 within a specific angular range, and into a rotary movement of the locking tongue 2 within a different angular range. In this way, the switching ring 6 also ensures that these two movements of the locking tongue 2 do not overlap.

[0043] The switching ring 6 is arranged concentrically to the rotary clamping sleeve 3 and thus also concentrically to the actuating axis of rotation B. It has a control edge against which a pin 7 can rest, ensuring that the locking shaft 4 moves axially and is not rotated together with the rotary clamping sleeve 3. When the cylinder core 13 has been rotated far enough that the pin 7 no longer rests against the control edge, the locking shaft 4 rotates together with the rotary clamping sleeve 3 about the actuating axis of rotation B, and the locking tongue 2 can thus be rotated back and forth between the pre-locking position R and the unlocking position E.

[0044] In order for the rotary clamping sleeve 3 to be rotated by the locking cylinder 10 around the actuating axis B, it has a crank section 8 which is located in the Fig. 6a und 6b This can be seen. The crank section 8 has a U-shaped recess at its distal end into which the locking bolt 11 can engage and which is thus designed as a bolt receptacle. A rotation of the cylinder core 13 then leads, via the crank section 8, to a rotation of the rotary clamping sleeve 3 and thus to the movement of the locking tongue 2.

[0045] In the Fig. 6a und 6b The locking position V is always visible, in which the locking tongue 2 can engage behind the door frame 40. Due to the geometric design of the locking cylinder 10, which in this embodiment is designed as a profile half-cylinder, the locking bolt 11 is not in a vertical zero position in the locking position V, but is pivoted by approximately 45 degrees. This is because the crank section 8 is directly rotationally coupled to the rotary clamping sleeve 3, so that the cylinder core 13 is not movable relative to the rotary clamping sleeve 3 and can engage in the crank section 8 in any position.

[0046] A counterclockwise rotation is not possible in this position, as the crank section 8 rests against a stop surface 12 of the lock cylinder 10. From this position, the locking bolt 11 can be rotated clockwise until the other side of the crank section 8 rests against the corresponding stop surface 12. This can be seen from the Fig. 6a As can be seen, the total radius of movement is therefore approximately 270 degrees, of which approximately 90 degrees are for a rotational movement of the locking tongue 2 and approximately 180 for an axial movement.

[0047] To assemble the locking device 50, the rotary latch 1 is first inserted into the housing 20 without the locking tongue 2. The housing 20 consists of two housing sections: a larger first housing section 21 and a smaller second housing section 22 located behind the first housing section 21. The second housing section 22 has a bore through which the locking shaft 4 passes, so that it protrudes from the rear of the housing 20 when the rotary latch 1 is positioned accordingly within the housing 20. In a subsequent step, the locking tongue 2 can be connected to the end of the locking shaft 4 protruding from the housing 20 using a screw.

[0048] The crank section 8 of the rotary clamping sleeve 3 rests against the rear wall of the first housing section 22, which, due to the smaller second housing section 21, acts like a shoulder, as can be seen from the Fig. 6a This can be seen. The crank section 8 thus ensures that the rotary locking device 1 cannot be pushed further into the housing 20 than is possible in the Fig. 5 This can be seen. The rotary latch 1 is not itself permanently connected to the housing 20. Instead, the locking cylinder 10, which is inserted into the housing 20 after the rotary latch 1, serves to fix the rotary latch 1 in the housing 20 and can be secured in the housing 20 by means of a fastening screw 23. Thus, the rotary latch 1 is also secured and fixed in the housing 20, at least indirectly, via the fastening screw 23.

[0049] Since the first housing section 21 is larger than the locking cylinder 10, as is the case, for example, in the Fig. 4b As can be seen, a mounting adapter 25 is provided, which enables the locking cylinder 10 to be adapted to the diamond-shaped first housing section 21. The mounting adapter 25 has a receptacle adapted to the locking cylinder 10, and its outer contour is adapted to the first housing section 21. If different locking cylinders 10 are to be used, only the mounting adapter 25 needs to be adapted to them, but not the rotary latch 1 or the housing 20, especially since the locking bolts 11 of different locking cylinders 10 are generally standardized.

[0050] As this is shown in the Fig. 5 As can be seen, the lock cylinder 10 has a bore below the locking bolt 11, which serves to connect the lock cylinder 10 to the housing 20 via the fastening screw 23. The mounting adapter 25 also has a corresponding bore which, when mounted, aligns with the corresponding bore of the lock cylinder 10, so that both the lock cylinder 10 and the mounting adapter 25 can be connected to the housing 20 using only one screw. Bezugszeichen:

[0051] 1 Rotary-locking latch 2 Locking tongue 3 Rotary clamping sleeve 4 Locking shaft 5 Slide guide 6 Switch ring 7 Pin 8 Crank section 10 Lock cylinder 11 Locking bolt 12 Stop surface 13 Cylinder core 20 Housing 21 First housing section 22 Second housing section 23 Mounting screw 24 Connecting flange 25 Mounting adapter 30 Door 40 Door frame 41 Seal 50 Locking device B Actuating rotary axis E Unlocking position R Pre-locking position V Locking position

Claims

1. Locking device for locking a door (30) to a door frame (40) with a rotary clamping lock (1) which has a rotatable and axially movable locking tongue (2), and an actuating unit for moving the locking tongue (2) between a locking position (V) and an unlocking position (E), wherein the actuating unit is designed as a replaceable lock cylinder (10) characterised in that the lock cylinder (10) has a lock bit (11) for moving the locking tongue (2) in the form of a thumb protruding in the radial direction, which can be rotated about an actuating axis of rotation (B) by means of a suitable key, wherein the rotary clamping lock (1) has a rotary clamping sleeve (3) which is rotationally coupled to the lock bit (11) via a crank section (8) in order to move the locking tongue (2).

2. Locking device according to one of the preceding claims, characterised in that the lock cylinder (10) is designed as a profile half-cylinder.

3. Locking device according to one of the preceding claims, characterised in that the locking tongue (2) is moved axially in a first angular range by a rotary movement of the lock bit (11) and is rotated in a second angular range.

4. Locking device according to one of the preceding claims, characterised in that the locking tongue (2) can be rotated back and forth between the unlocking position (E) and a pre-locking position (R).

5. Locking device according to one of the preceding claims, characterised in that the locking tongue (2) can be moved axially back and forth between the pre-locking position (R) and the locking position (V).

6. Locking device according to one of the preceding claims, characterised in that the rotary clamping lock (1) has a locking shaft (4) connected to the locking tongue (2), wherein the rotary clamping sleeve (3) has a slide guide (5) and the locking shaft (4) is guided in the slide guide (5) to effect an axial displacement of the locking shaft (4) when the rotary clamping sleeve (3) is rotated.

7. Locking device according to one of the preceding claims, characterised by a housing (20) connectable to the door (30), in which the rotary clamping lock (1) and the locking cylinder (10) are jointly accommodated.

8. Locking device according to claim 7, characterised in that the rotary clamping lock (1) is secured in the housing (20) via the lock cylinder (10).

9. Locking device according to one of claims 7 or 8, characterised in that the housing (20) has a first housing section (21) for accommodating the lock cylinder (10) and a second housing section (22) for accommodating the rotary clamping lock (1), wherein the first housing section (21) is designed in a rhombus shape.

10. Locking device according to one of claims 7 to 9, characterised by a mounting adapter (25) for mounting the lock cylinder (10) in the housing (20), wherein the mounting adapter (25) is detachably connected to the housing (20) and detachably connected to the lock cylinder (10).

11. Locking device according to claim 10, characterised in that the lock cylinder (10) can be screwed to the housing (20) together with the mounting adapter (25).

12. Locking device according to one of claims 10 or 11, characterised in that the mounting adapter (25) fixes the rotary clamping lock (1) in the axial direction in the housing (20).

13. Door with a locking device (50) for locking the door (30) against a door frame (40), wherein the locking device (50) is designed according to one of the previous claims.

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