Double lock cylinder

Abstract

In a double locking cylinder, an axially displaceable coupling slide (17, 18) projecting into a locking channel (7, 8) is connected via a force redirection (23, 24) to a radially displaceable coupling wedge (19, 20). In an operating position, the coupling wedge (19, 20) projects into the range of motion of a coupling pin (34, 35) axially guided in a locking bar (4). This transmits a torque from the radially movable coupling wedge (19, 20) to the coupling pin (34, 35). The double locking cylinder offers particularly high operational reliability.

Description

[0001] The invention relates to a double locking cylinder with two cores rotatable in a housing, each with a locking device for selectively blocking or releasing the cores, with a locking bar arranged between the cores, having a locking bar ring and a locking bar nose projecting from the locking bar ring, with a coupling device for positive locking coupling of the locking bar to one of the cores, with a locking channel arranged in at least one of the cores for inserting a key to control the locking device, wherein in a home position in which none of the coupling devices generate a positive locking, the locking bar is freely rotatable.

[0002] Double-lock cylinders, in which the locking bolt is freely rotatable in a neutral position where neither coupling device creates a positive lock, are particularly needed for use in panic locks. When the key is inserted, the coupling devices create a positive lock with the central locking bolt, either on one side or the other, and release the positive locks when the key is removed.

[0003] From EP 0 826 854 A2, a coupling device for a cylinder lock is known. The coupling device has a coupling plate for each cylinder core, which is rotationally fixed to the respective cylinder core for common rotation about an axis. The coupling plate is movable against a preload by the application of force in the axial direction. A coupling pin is provided for each cylinder core, which, in the coupled state, creates a rotationally fixed connection between the coupling plate and the locking bolt hub. For this purpose, the coupling pin is mounted on the locking bolt hub so as to be axially displaceable and is pressed towards the respective coupling plate by preload. The coupling plate has a coupling recess to receive the coupling pin. The coupling pin has very small dimensions and must be positioned opposite the coupling recess when closing.

[0004] From EP 0 536 653 A1, a locking cylinder is known in which bushings, axially pre-tensioned towards the cores by spring elements, can be axially displaced by a key inserted into the locking channel. The bushings, with a protruding tooth, create a positive fit with the locking bolt. The tooth must be positioned relative to the locking bolt during closing.

[0005] The invention is based on the problem of further developing a double locking cylinder of the type mentioned above in such a way that it ensures a particularly reliable function and can be used in panic locks in particular.

[0006] This problem is solved according to the invention by the fact that the coupling devices each have a coupling slide that can be displaced axially when closing and a coupling wedge that can be displaced radially, that in each of the coupling devices the coupling wedge is guided in the core in a rotationally fixed manner, that the coupling slide and the coupling wedge are connected via a force redirection, so that when the coupling slide is displaced axially, the coupling wedge can be displaced radially outwards to generate a positive locking with the closing lug.

[0007] This design allows the coupling wedge to be manufactured with high stability and capable of withstanding high forces. The positive locking mechanism created by the radial movement of the coupling wedge ensures exceptionally high operational reliability of the double locking cylinder. When both coupling wedges are in a radially inner position, the locking bolt can rotate freely, allowing the double locking cylinder to be used in panic locks.

[0008] According to an advantageous embodiment of the invention, the coupling wedge can be radially pushed out of the positive engagement with the locking bolt when no key is inserted, provided the force redirection has adjacent ramps of the coupling slide and the coupling wedge. This design allows the locking bolt to be rotated when no key is inserted into the lock cylinder, which is particularly important for use in panic locks.

[0009] According to another advantageous embodiment of the invention, reliable movement of the clutch slider back to its initial position can be easily ensured if the clutch slider is axially supported on the core by a slider spring element. This ensures that the clutch slider is reliably moved back to its initial position after the key is removed.

[0010] The axial displacement of the coupling slide during closing can be achieved, for example, via push buttons or electromechanically in knob cylinders. When closing with a key, the coupling slide can be displaced axially particularly easily when inserting a key, according to another advantageous embodiment of the invention, if the coupling slide projects directly or indirectly into the locking channel via a plunger. The use of a plunger allows the double locking cylinder to be adjusted to a predetermined length.

[0011] According to another advantageous embodiment of the invention, generating the positive locking of the radially outwardly moving coupling wedge with the locking bar is particularly simple in terms of design if the locking bar ring has an axial guide for a coupling pin and if the coupling pin projects into the movement area of ​​the radially outwardly moving coupling wedge.

[0012] According to another advantageous embodiment of the invention, the positive locking of the locking bar ring with the coupling wedge is structurally particularly simple if two coupling discs are arranged coaxially to the locking bar ring, if the coupling discs support coupling pins projecting from each of the cores radially within the locking bar ring, and if the coupling pins each have a shoulder for axial support on one of the coupling discs and project beyond the other coupling disc with a coupling section. The radial positioning of the coupling wedge and the axial positioning of the coupling pin, intended for locking, enable the positive locking of the respective core with the locking bar.

[0013] To further simplify the engagement of the locking bolt with the coupling wedge when the key is not inserted, another advantageous embodiment of the invention provides that the coupling wedge has a ramp and the coupling section has a flank shaped accordingly, and that the angles of the contacting surfaces are greater than their friction angles. This design ensures that torque can only be transmitted from the coupling wedge to the locking bolt if the coupling wedge is radially supported. Otherwise, the flanks and ramps slide against each other and push the coupling wedge out of the coupling pin's range of motion. Preferably, the ramps and flanks are designed as symmetrical double ramps and double flanks to allow torque transmission in both directions of rotation.

[0014] According to another advantageous embodiment of the invention, pre-tensioning the components into a predetermined initial position is particularly easy if the clutch wedge is supported on the adjacent clutch disc by a spring pin and the spring pin can be moved from a protruding pre-tensioned position to a position pressed back into the clutch wedge.

[0015] A particularly reliable functionality of the double locking cylinder can be easily ensured according to another advantageous embodiment of the invention if the section of the spring pin projecting beyond the coupling wedge in the protruding position is larger than the coupling section of the coupling pin. This design prevents a positive fit between the core and the locking bolt as long as the coupling wedge is not axially displaced by the insertion of the key. This also ensures the free movement of the locking bolt, which is often necessary in so-called panic locks.

[0016] If the coupling wedge is axially positioned above the coupling pins, a positive fit between the core and the locking bolt in the direction of rotation is not possible. The core would first have to be rotated slightly for axial movement. To ensure trouble-free operation of the double locking cylinder during normal operation, it is advantageous to align the coupling wedge relative to the coupling pins in the key removal position. According to another advantageous embodiment of the invention, such alignment can be easily performed during initial actuation if the coupling wedge has a locking element for holding the spring pin in a central position and if the locking element permanently releases the movement of the spring pin after initial actuation. With this design, the locking element holds the spring pin only in an assembly position in which the coupling wedge can axially engage the coupling pins during initial actuation.After the coupling wedge is aligned with the coupling pins, it is pressed axially against the next coupling disc, permanently releasing the connection between the locking element and the spring pin. In the subsequent operating state of the double locking cylinder, this prevents any obstruction of the coupling wedge's axial movement during locking.

[0017] The key can be fully inserted into the locking channel in the assembly position where the coupling wedge can be positioned axially above the coupling pin, provided the coupling discs are arranged to be axially displaceable or tiltable in the locking bar ring.

[0018] According to another advantageous embodiment of the invention, the assembly of the coupling slide and its reliable operation can be easily ensured if a locking element movably arranged in the core is movable within the coupling slide's range of motion on the side facing away from the coupling wedge, and if the movement is controllable by the rotational position of the core relative to the housing. This control, dependent on the rotational position, can be easily achieved by providing the housing with a pocket and adjacent control ramps for receiving one end of the locking element. The locking element is preferably designed as a pin.

[0019] According to another advantageous embodiment of the invention, determining the position of the clutch discs during operation of the double locking cylinder is particularly simple in terms of design if the clutch discs rest against a central locking bar hub of the locking bar in the basic position.

[0020] The invention allows for numerous embodiments. To further illustrate its basic principle, one of these is shown in the drawing and described below. This shows in Fig. 1 shows a double locking cylinder in a longitudinal section, Fig. 2 shows the double locking cylinder made of Figure 1 in a sectional view along line II - II, Fig. 3 the double locking cylinder made of Figure 2 in a sectional view along line III - III, Fig. 4 the double locking cylinder made of Figure 2in a sectional view along line IV - IV, Fig. 5 two coupling devices of the double locking cylinder in an enlarged perspective view, Fig. 6a a sectional view through a coupling wedge of the double locking cylinder in an operating position, Fig. 6b a sectional view through a coupling wedge of the double locking cylinder in a mounting position, Fig. 7 another sectional view through the double locking cylinder during initial actuation.

[0021] Figure 1Figure 1 shows a double cylinder lock with two rotatable cores 2 and 3 within a housing 1 and a locking bolt 4 arranged centrally between the cores 2 and 3. The housing 1 has locking devices 5 and 6 for selectively blocking or releasing the movement of the cores 2 and 3. The cores 2 and 3 each have a keyway 7 and 8 for inserting a key 9 and for controlling the locking devices 5 and 6. Coupling devices 10 and 11 are arranged between the cores 2 and 3 and the locking bolt 4. When a key 9 is inserted into the respective keyway 7 and 8, these coupling devices 10 and 11 create a positive-locking coupling between the locking bolt 4 and the respective core 2 and 3.

[0022] One of the cores 3 has a core extension with a battery 12 and a plunger 13 that penetrates the locking channel 8. The coupling device 11 arranged on this side is actuated via the plunger 13. Of course, both sides can also be constructed identically or have a knob (not shown) with a push button for actuating the coupling devices 10, 11. In the illustrated embodiment, the locking devices 4, 5 have electromagnetic actuators. In an embodiment not shown, the locking devices can also have mechanical pin tumblers.

[0023] The locking bar 4 has a locking bar ring 14, a locking bar nose 15 projecting from the locking bar ring 14, and a central locking bar hub 16. The coupling devices 10, 11 each have an axially displaceable coupling slide 17, 18 and a coupling wedge 19, 20. The coupling wedges 19, 20 bear against coupling discs 21, 22 arranged within the locking bar ring 14. The coupling discs 21, 22 bear against the locking bar hub 16.

[0024] Figure 2Figure 1 shows an enlarged cross-sectional view through the area of ​​the double locking cylinder containing the coupling devices 10, 11 along line II-II. It can be seen that the coupling slide 17, 18 and the coupling wedge 19, 20 are connected to each other via a force deflection 23, 24. The force deflection 23, 24 has ramps 25, 26 adjacent to each other on the coupling slide 17, 18 and the coupling wedge 19, 20, such that when the coupling slide 17 is axially displaced by inserting the key 9 into the locking channel on the right side, the coupling wedge 19 is radially displaced within the locking bolt ring 14. The angles of the adjacent ramps 25, 26 are chosen to be larger than their respective friction angles. An axial force introduced into the clutch slide 17 by the key 9 thus causes the clutch device 10 of the respective side to be actuated.Without the axial force introduced by the key 9, the clutch slider 17 and clutch wedge 19 would slide apart and no torque could be transmitted.

[0025] The coupling slide 17, 18 is guided axially and non-rotatably in the core 2, 3. The coupling wedge 19, 20 extends over the axis of rotation of the cores 2, 3 to a radially inner limit of the locking bolt ring 14. The coupling wedge 19, 20 has an axial / radial guide 27, 28 in the core 2, 3 and is held non-rotatably. This displacement creates a positive fit between the respective core 2, 3 and the locking bolt 4, and the respective side of the double locking cylinder is in the closed position, in which a lock connected to the locking cylinder can be closed. This state is shown on the right side of the image for the coupling device 10.

[0026] The clutch slide 17 of the clutch assembly 10 shown on the right side of the image is supported on the core 2 by a slide spring element 29. The clutch wedge 19 is supported on the next clutch disc 21 by a wedge spring element 30 and a spring pin 31. When the key 9 is removed, the slide spring element 29 and the wedge spring element 30 pre-tension the clutch slide 17 and the clutch wedge 19 into a home position, which is shown on the left side of the image for the clutch assembly 11. In this home position, the respective core 3 and the locking lug 4 are decoupled from each other.

[0027] If both coupling devices 10, 11 are in their home position as shown on the left side of the image, the locking bar 4 is decoupled and can be rotated freely.

[0028] Figure 3 shows a cross-sectional view through the double locking cylinder made of Figure 2along line III-III. This sectional view is guided by the coupling device 10, which creates the positive locking of one core 2 with the locking lug 4 in the direction of rotation. The locking lug ring 14 has axial, partially cylindrical guides 32, 33 for coupling pins 34, 35, so that a torque can be transmitted from the coupling pins 34, 35 to the locking lug 4. The axial / radial guide 27 for the coupling wedge 19, located outside the plane of the section, is shown in dashed lines. The coupling wedge 19 projects with a double ramp 36 into the range of motion of one coupling pin 34. The coupling pin 34, which is connected to the coupling wedge 19, has a double flank 37 shaped according to the double ramp 36 and is correspondingly partially cylindrical with the section of the guide 32 located in the locking lug ring 14. The double ramp 36 and the double flank 37 ensure that torque can be transmitted in both directions.Furthermore, the adjacent flanks 37 and ramps 36 ensure that the torque can only be transmitted when the clutch wedge 19 is radially supported by the inserted key 9. The locking bolt 4 can then be turned using the key 9.

[0029] Figure 4 shows a cross-sectional view through the double locking cylinder made of Figure 2along line VI-VI in the area of ​​a locking element 38. The locking element 38 is slidably guided in the core 2 on a ramp 39 of the coupling slide 17 and controlled by a pocket 40 in the housing 1. In the illustrated rotational position of the core 2, the locking element 38 can be moved out of the movement range of the coupling slide 17. With a slight rotation of the core 2, the locking element 38 is supported by the housing 1 and engages behind the coupling slide 17 on the side facing away from the coupling wedge 19 at the ramp 39. The coupling slide 17 also has a rotation lock 41 in the core 2.

[0030] Figure 5 shows in perspective the individual components of the coupling devices 10, 11 of the double locking cylinder. Figure 1It can be seen that the coupling pins 34, 35 each have a shoulder 42, 43 for support on the opposite coupling disc 21, 22. Furthermore, the coupling pins 34, 35 project beyond the coupling discs 21, 22 with a coupling section 46, 47. If the coupling wedge 19, 20 on one side of the lock cylinder is axially positioned above one of the coupling pins 34, 35 and a key 9 is inserted into the corresponding locking channel 7, the coupling pin 34 transmits an axial force to the coupling disc 22 furthest from the coupling wedge 19. This axial force causes the coupling disc 33 to tilt against the force of the spring pin of the other coupling wedge 20. Subsequently, one core 2 can be rotated via the key 9 until the free end of the coupling pin 34 snaps back into place next to the coupling wedge 20, enabling a positive fit between core 2 and locking bolt 4. This possibility of tilting one coupling disc 22 is in Figure 7 explained in more detail.

[0031] Figure 6a shows the coupling wedge 19 in a sectional view in operating position. Figure 6b Figure 1 shows the clutch wedge 19 in a sectional view in its assembled position. A comparison of the figures shows that the spring pin 31 is held in a central position by a locking element 44 in the assembled position. The clutch wedge 19 is installed in this position. After initial actuation of the double locking cylinder, the spring pin 31 is depressed, releasing the locking element 44. The locking element 44 is then held in a recess 45, without any function. The spring pin 31 can protrude permanently in the operating position and bear against the corresponding clutch disc 19.

[0032] Figure 7 shows the double locking cylinder made of Figure 2During initial activation of the side shown on the right with key 9. The side shown on the left is in an assembly state in which, as shown in Figure 6b As shown analogously, the locking element 44 holds the spring pin 31 in a central position. When the key 9 is inserted, the coupling wedge 19 of the coupling device 10 shown on the right, for example, comes into contact perpendicularly with the end face of the coupling pin 34. This, with its shoulder 42, axially pushes the coupling disc 22 of the coupling device 11 shown on the left and tilts it. A positive locking in the direction of rotation cannot be created in this way. Only after an initial rotation of the right core 2 do the end faces of the coupling wedge 19 and one of the coupling pins 34 no longer overlap, so that the tilted coupling disc 22 engages in the Figure 2 The position shown can snap into place. In this process, the coupling pin 34, as shown in Figure 2shown, moved by the spring force of the spring pin 31' of the left coupling device 11 next to the coupling wedge 19.

[0033] The first actuation process occurs when the clutch slide 17 is displaced towards the cylinder center by inserting the key 9 into the locking channel 7. The force applied during insertion acts axially from the clutch slide 17 to the clutch wedge 19 via the inclined ramps 25, 26. The clutch wedge 19 is initially displaced radially so that the end faces of the clutch wedge 19 and the clutch pin 34 can face each other. The clutch wedge 19 presses the clutch pin 34 into the locking lug 4 via an end face, whereby the clutch pin 34 tilts one of the clutch discs 22 against the spring force, as described in Figure 7The locking element 44 is released and moved into the pocket 45 and subsequently no longer serves any function. By turning the key 9, the clutch slide 17 is rotated about the longitudinal axis of the core 2. This causes the clutch wedge 19, which is connected to it at the contact surface, to also rotate about this axis. After the rotation of the key 9 stops, the end faces of the clutch wedge 19 and the clutch pin 34 no longer overlap, so that the clutch pin 34 is pressed towards the key 9 by the spring-loaded clutch disc 22. The clutch disc 22 is now back in its position. Figure 2 The initial position shown. Thus, the coupling pin 34 and the coupling wedge 19 are aligned with each other by the first actuation.

[0034] After the key 9 has been turned almost 360°, the coupling wedge 19 rests with one side of the double ramp 36 against one side of the double flank 37 of the coupling pin 34. Further turning of the key 9 causes the coupling pin 34 to rotate via the connection between the coupling slide 17 and the coupling wedge 19. Because the partially cylindrical section of the coupling pin 34 engages in the guide 32 of the locking bolt 4, the locking bolt 4 is also rotated, and a lock connected to the cylinder can be actuated. After the key 9 is removed, the locking bolt 4, and thus also the locking bolt nose 15, is in a rotational position that differs from its assembly state and corresponds to the standard operating state of the cylinder.

[0035] In the following normal operation of the lock cylinder, the end faces of the coupling wedge 19 and the coupling pin 34 are generally aligned with each other in the direction of rotation. The double lock cylinder can therefore be closed by inserting and turning the key 9 authorized to lock it.

[0036] However, if the end faces of the coupling wedge 19 and coupling pin 34 should overlap, the actuation process is repeated as described above during the initial actuation. Since, particularly when used in a panic lock, the locking bolt 4 can be manually rotated even with the key 9 removed, the design of the coupling devices 10, 11 increases the operational reliability of the double locking cylinder.

Claims

1. Double locking cylinder with two cores (2, 3) rotatable in a housing (1), each with a locking device (5, 6) for selectively blocking or releasing the cores (2, 3), with a locking bar (4) arranged between the cores (2, 3) having a locking bar ring (14) and a locking bar nose (15) projecting from the locking bar ring (14), with a coupling device (10, 11) for positively engaging the locking bar (4) with one of the cores (2, 3), with a locking channel (7, 8) arranged in at least one of the cores (2, 3) for inserting a key (9) for controlling the locking device (5, 6), wherein in a home position in which neither of the coupling devices (10, 11) generates a positive engagement, the locking bar (4) is freely rotatable, characterized by the fact thatthe coupling devices (10, 11) each have a coupling slide (17, 18) that can be displaced axially when closing and a coupling wedge (19, 20) that can be displaced radially, that in each of the coupling devices (10, 11) the coupling wedge (19, 20) is guided in the core (2, 3) in a rotationally fixed manner, that the coupling slide (17, 18) and the coupling wedge (19, 20) are connected via a force redirection (23, 24), so that when the coupling slide (17, 18) is displaced axially, the coupling wedge (19, 20) can be displaced radially outwards to generate a positive locking with the locking lug (4).

2. Double locking cylinder according to claim 1, characterized by the fact that the force redirection (23, 24) has adjacent ramps (25, 26) of the clutch slide (17, 18) and the clutch wedge (19, 20).

3. Double locking cylinder according to claim 1 or 2, characterized by the fact that the clutch slide (17, 18) is axially supported on the core (2, 3) via a slide spring element (29).

4. Double locking cylinder according to at least one of claims 1 to 3, characterized by the fact that the clutch slide (17, 18) projects directly or indirectly into the closing channel (7, 8) via a plunger (13).

5. Double locking cylinder according to at least one of claims 1 to 4, characterized by the fact that the locking bar ring (14) has an axial guide (32, 33) for a coupling pin (34, 35) and that the coupling pin (34, 35) projects into the movement range of the radially outwardly moving coupling wedge (19, 20).

6. Double locking cylinder according to at least one of claims 1 to 5, characterized by the fact thatcoaxial to the locking bar ring (14) two coupling discs (21, 22) are arranged, such that the coupling discs (21, 22) support coupling pins (34, 35) projecting radially to each of the cores (2, 3) within the locking bar ring (14) and that the coupling pins (34, 35) each have a shoulder (42, 43) for axial support on one of the coupling discs (21, 22) and project beyond the other coupling disc (21, 22) with a coupling section (46, 47).

7. Double locking cylinder according to at least one of claims 5 to 6, characterized by the fact that the coupling wedge (19, 20) has a ramp and the coupling section (46, 47) has a flank shaped accordingly to the ramp and that the angles of the adjacent surfaces are greater than their friction angles.

8. Double locking cylinder according to at least one of claims 6 to 7, characterized by the fact thatthe clutch wedge (19, 20) is supported on the adjacent clutch disc (21, 22) via a spring pin (31) and the spring pin (31) can be moved from a protruding pre-tensioned position to a position pushed back into the clutch wedge (19, 20).

9. Double locking cylinder according to claim 8, characterized by the fact that the section of the spring pin (31) that extends beyond the coupling wedge (19, 20) in the protruding position is larger than the coupling section (46, 47) of the coupling pin.

10. Double locking cylinder according to at least one of claims 1 to 9, characterized by the fact that the coupling wedge (19, 20) has a locking element (44) for holding the spring pin (31) in a central position, and that the locking element (44) permanently releases the movement of the spring pin (31) after an initial actuation.

11. Double locking cylinder according to at least one of claims 5 to 10, characterized by the fact thatthe clutch discs (21, 22) are arranged to be axially displaceable or tiltable in the locking bar ring (14), 12. Double locking cylinder according to at least one of claims 1 to 11, characterized by the fact that a locking element (38) movably arranged in the core (2, 3) is movable into the movement range of the coupling slide (17, 18) on the side facing away from the coupling wedge (19, 20) and that the movement is controllable by the rotational position of the core (2, 3) relative to the housing (1).

13. Double locking cylinder according to at least one of claims 1 to 12, characterized by the fact that The clutch discs (21, 22) are in the basic position against a central locking bar hub (16) of the locking bar (4).

Images