GB2179095A

GB2179095A - Cylinder lock for motor and manual operation

Info

Publication number: GB2179095A
Application number: GB08619503A
Authority: GB
Inventors: Othmar Uebersax
Original assignee: Bauer Kaba AG
Current assignee: Bauer Kaba AG
Priority date: 1985-08-12
Filing date: 1986-08-11
Publication date: 1987-02-25
Also published as: DE3619756C2; DE3619756A1; GB2179095B; GB8619503D0

Abstract

A motor and manually operable cylinder lock is advantageously constructed in such a way that the manual and motor function cannot be impaired or destroyed in an undesired manner. The respective key-operated rotor parts 4,26, are connected to by engageable and disengageable couplings 5,41, to respective further parts 6,22. The respective further parts are connected by a shaft 19 to rotate together and one 6 drives the lock bolt while the other 22 can also be driven by the motor 23 via an electromagnetically controlled clutch 29. The key guide 50,55 does not have a continuous construction, so that coupling members are protected from outside intervention. <IMAGE>

Description

SPECIFICATION Cylinder lock Field of the Invention The present invention relates to a cylinder lock, in particular, a lock which can be operated manually or by a motor.

Background to the Invention Typically such a lock has rotor parts mounted to rotate in each of two coaxially arranged, fixed outer cylinders. Each rotor part has a key guide and a stop bolt, and has tumbler bolts associated with it. The tumbler bolts extend in bores in the inner cylindrical rotor part and the outer cylinder under a resilient bias, and are displaceable in the bores. A pivotable driver between the two rotor parts is in operative connection with a bolt and/or a catch of a lock or other locking member and can be non-positively connected with each of the two rotor parts, as well as with a geared motor via connecting members.

Such locks having safety or security lock cylinders are in many cases used for assembly with mortise locks in which a bolt and/or a catch is in operative connection with a driver for opening and closing a door.

An electrically remotely controllable mortise lock is inter alia known, which has dimensions according to DIN (Deutsche Industrie Norm- German Industry Standard) 18250/1. It is possible with the aid of such remotely controllable mortise locks to indicate and monitor the state of a door or lock, namely "open" or "closed", optically and/or acoustically at a desired point either electrically or electronically, c.f. in this connection e.g. DE-OS 3309 962 Al.

The present invention seeks to provide a cylinder lock in which the manual and motor functions cannot be undesirably disturbed, and preferably also to provide a key guide which is finite or limited, i.e. not continuous.

Summary of the Invention According to the invention there is provided a cylinder lock for manual and motor operation, having two axially spaced co-axial outer cylinders, first and second rotor parts each mounted in a respective outer cylinder and key-releasable for rotation with respect to the associated outer cylinder, a rotatable driver operatively connected to a bolt or a catch and connectable to the first rotor part by a first engageable and disengageable coupling, a further rotatable member connected to rotate with the driver and connectable to the second rotor part by a second engageable and disengageable coupling, and a motor for motor operation of lock, the first rotor part being connected to the driver via the first coupling when a key is used to rotate the first rotor part, the second rotor part being connected to the further rotatable member via the second coupling when a key is used to rotate the second rotor part, and the motor being operatively connected to the further rotatable member during motor operation of the lock.

In a further aspect of the present invention there is provided a safety combination lock, particularly for the manual and motor closing of a door, in which a rotor part is mounted in rotary manner in one of two coaxially positioned fixed, outer cylinders and each rotor part has a key guide and tumbler bolts under spring action in bores of the inner cylindrical rotor part and the outer cylinder, which are displaceably mounted therein and whereby between the two rotor parts, a pivotable driver in operative connection with a bolt and/or a catch of a lock can be non-positively connected via connecting members with one of the two rotor parts, as well as with a geared motor, characterized in that on the one hand a rotor part of a first safety lock cylinder can be connected non-positively via an engageable and disengageable coupling to a driver and on the other hand a rotatably mounted part connected via a shaft to the driver can be nonpositively connected by means of an engageable and disengageable coupling to a rotor part of a second safety lock cylinder and via a further engageable and disengageable coupling to the toothed wheel of a geared motor.

Preferably the lock has bias means tending to disengage the first and second couplings when the respective rotor part is not being operated by a key.

In one embodiment of the invention a respective pin slide is mounted so as to reciprocate under spring bias in a respective bore in a respective member of each of the first and second couplings, for movement transversely with respect to the longitudinal axis of the lock cylinder, and each pin slide can be inserted into a respective depression arranged on the inside of the associated fixed outer cylinder part.

According to a further advantageous development of the invention, a respective driving pin is positioned in each of the two coupling members in each case extending transversely with respect to the longitudinal axis of the lock cylinder, each driving pin being guided in reciprocable manner in a bore transverse to the longitudinal axis of the lock cylinder. In a predetermined position each driving pin faces a respective recess on the inner circumference of the drive, or, in the case of the second lock cylinder, the further rotary part in the form of a coupling flange.

Each pin slide may have a projecting arm and a respective spring may be positioned between the projecting arm of the pin slide and the driving pin.

To aid the fitting of the lock to doors of different thicknesses, the driver is preferably fixed via a telescopic tube to rotate with a coupling flange arranged in the vicinity of the second safety lock cylinder.

Advantageously, the motor is in driving connection with the coupling flange via a drive shaft and a toothed wheel of a gear arranged on the motor and an electromagnetically engageable and disengageable coupling, and motor drive is transmitted from the coupling flange via the telescopic tube with the driver.

For detecting undesired manipulations of the lock, a respective operating element with a spring-loaded sensor may be provided on each of the two outer cylinders of the lock, with the sensors indicating the presence of a key or other member inserted in the lock.

An operating member with a spring-loaded sensor may also be provided for indicating the neutral position of the driver and in a predetermined position said sensor is moved into a recess in the driver, the coupling flange or other rotary member which turns with the driver, and in said position provides a signal indicating the neutral position of the driver.

According to another advantageous development of the invention, the geared motor is fixed to rotate with the driver via a linkage including a a shaft and a toothed wheel fixed to the shaft.

Between the rotor of a first lock cylinder and the driver on the one hand as well as between the rotor of a second lock cylinder and the toothed wheel fixed to the shaft on the other hand there is preferably provided in each case an engageable and disengageable claw coupling.

According to another advantageous development of the invention, on the inner circumference of the outer lock cylinders there is provided in each case an abutment, which engages in a recess on the associated rotor over a predetermined axial length range and permits axial movement but restrains rotation of the rotor over the predetermined length range of the recess.

With these last-mentioned arrangements there may also be provided an operating member with a spring-loaded sensor on each outer cylinder of the lock to detect undesired manipulation of the lock, with the sensors also indicating the presence of a key in the associated rotor.

Embodiments of the present invention, given by way of non-limitative example, will now be described with reference to the accompanying drawings, in which: Figure 1 shows a longitudinal section through a lock which is a first embodiment of the present invention; Figure 2 shows a detail of the embodiment shown in Fig. 1, revealing the arrangement of an operating member 34 for controlling and detecting a neutral position of the driver; and Figure 3 shows a second lock embodying the present invention, in longitudinal section.

Detailed Description of the Illustrated Embodiments As shown in Fig. 1 a safety lock cylinder 2 is arranged in a manner known per se in a lock case 1 (not shown in detail). The cylinder has a fixed outer cylinder part 3, and a rotor 4 mounted in rotary manner in the outer part 3, the rotor having a key guide 50 for receiving a key.

The rotor 4 can be coupled with a driver 6 by means of a coupling member 5. The driver 6 has, in a manner known per se, a cam (not shown) which is in operative connection with a bolt (also not shown) for reciprocating the same or for opening and closing a door.

A pin slide 7 is mounted in a bore 10 in the coupling member 5 fixed to rotor 4 so as to reciprocate transversely to the longitudinal axis of lock cylinder 2 while subject to the bias of a compression spring 8. A depression 11 is provided on the inside of the fixed outer cylinder part 3 facing one end 12 of the pin slide 7. The pin slide can be inserted into said depression to release the driver 6 from the coupling connection with the coupling member 5.

One end of a compression spring 9 is supported on a projecting arm 13 of the pin slide 7, whilst the other end of the spring bears on a driving pin 14 guided in reciprocable manner in a bore 15 arranged transversely to the lock cylinder axis. The driver 6 has a recess 16, which faces the driving pin 14 at a predetermined position on the inner periphery of the driver 6.

The driver 6 is fixed with the aid of a pin 17 to turn with a shaft end 18. A telescopic tube 19 is connected at one end to the shaft end 18 via a cross pin 20. The other end of tube 19 is keyed, e.g. via pins 21, to a coupling flange 22 of a further safety lock cylinder 24. Lock cylinder 24 can be operated via a geared motor 23 or manually with the aid of a key and which is preferably located on the inside of a door. With the aid of the telescopic tube 19 the units of the lock, i.e. the safety lock cylinders, driver and motor drive, can be easily adapted for fitting to different door thicknesses.

The construction and operation of the further safety lock cylinder 24 essentially correspond to the construction and operation of the first safety lock cylinder 2. Therefore no further explanation is necessary in this connection. It is merely pointed out that the coupling flange 22 takes the place of the driver 6.

The geared motor 23 is in driving connection with the driver 6 via a mitre gear 27, an electromagnetically engageable and disengageable tooth wheel 28 in the gear train from the geared motor, via the coupling flange 22, the telescopic tube 19 and the shaft end 18.

The coupling flange 22 is mounted to rotate in a bearing bush 31 fixed to the casing 30 of the geared motor 23. An electromagnetically operable coupling 29 for the toothed wheel 28 acts by means of a coil 33 placed in an annular body 32.

As shown in Fig. 2 an operating member 34 is provided on the periphery of bearing bush 31. The operating member 34 has a spring-loaded sensor 35, which in a predetermined position moves into a recess 36 in coupling flange 22 and in this position controls the momentum for or provides the signal indicating the neutral or rest position of driver 6. In addition, on the outer, fixed cylindrical parts 3, 25 of the two safety lock cylinders 2, 24 there is provided in each case an operating member 37, 38 with a spring-loaded sensor 39, 40, making it possible to detect the presence of a key or an undesired manipulation of the lock.

The rotor 26 of the safety lock cylinder 24 can, be coupled by means of a coupling mem bey 41 to the coupling flange 22. A pin slide 42 is mounted in a bore 45 in the coupling member 41 fixed to the rotor 26 so as to reciprocate in a direction transverse to the axis of lock cylinder 24 while subject to the bias of a compression spring 44. A depression 46 which faces one end 47 of pin slide 42 is provided on the inside of the fixed, outer cylinder part 25. The end 47 of the pin slide 42 can be inserted into the depression 46 to release the coupling flange 22 from coupling connection with the coupling member 41.

One end of a compression spring 43 is supported on a projecting arm 48 of the pin slide 42, whilst the other end of the spring 43 bears on a driving pin 49 guided in reciprocable manner in a bore 51 positioned transversely to the axis of the lock cylinder 24. The coupling flange 22 has a recess 52, which faces the driving pin 49 at a predetermined position on the inner periphery of the coupling flange 22.

The lock constructed according to Figs. 1 and 2 is operated in the following way. In the case of manual operation of the lock cylinder 2, the inner rotor 4 is coupled to the driver 6 by turning the rotor 4 with an authorized key.

The pin slide 7 is raised from the depression 11 and the driving pin 14 moves into the recess 16 of the driver 6. The driver 6, coupled in this way to rotor 4, is further turned with the aid of the key in the desired manner for locking the door or extending the bolt.

In the case of manual operation of the lock cylinder 24, the rotor 26 is coupled to the coupling flange 22 by turning the rotor 26 with an authorized key. The pin slide 42 is raised from the depression 46 and the driving pin 49 is moved into the recess 52 of the coupling flange 22. The coupling flange 22, coupled in this way with the rotor 26, is further turned with the aid of the key in the desired manner for locking the door or extending the bolt.

In the case of motor operation of the coupling flange 22 by the geared motor 23, and of the driver 6 connected to rotate with the coupling flange 22 via the telescopic tube 19, there is no rotation of the rotors 4 and 26 of the two safety lock cylinders 2 and 24. The coupling connection between the toothed wheel 28 of the geared motor 23 and the coupling flange 22 is produced in a manner known per se with the aid of the electromagnetically engageable and disengageable coupling 29, i.e. the toothed wheel 28 mounted on coupling the flange 22 is drawn by means of the magnetic field produced by coil 33 onto coupling flange surface 56. Thus, the releasable connection of the geared motor 23 to the driver 6 is provided by a stop cam 57 fitted to the toothed wheel 28.

In Fig. 3, a safety lock cylinder 60 is arranged in a lock case (not shown) and has an inner, axially displaceable rotor 61, which is provided with a key guide 62 for receiving a key 63.

A cam 65 is provided on the inner circumference of the outer, fixed part 64 of the safety lock cylinder 60, which cam engages in a recess 66 in the rotor 61 over a predetermined length range and only permits an axial reciprocation, but no rotation of rotor 61, in the predetermined length range.

There is also an axially reciprocable member 67, which is connected to rotate with the rotor 61 via a slot 68 and a pin 69 guided in the slot and fixed to the rotor 61. Compression springs 70, 71 are inserted between the rotor 61 and the coupling member 67 and aid the coupling function.

The axially reciprocable coupling member 67 and a driver 72 in operative connection with a bolt and/or catch both have respective opposed claws, 73, 74 which can be engaged with each other to couple the driver 72 to the rotor 61. The driver 72 is mounted to rotate in bearing bushes 75, 76 and is connected via a shaft 77 to rotate with a gear 79 of a geared motor 80.

In this embodiment also, a key checking function is provided by means of a limit switch 97 having a sensor and which is arranged on the inside of the fixed, outer cylindrical part 64 of the safety lock cylinder 60.

Furthermore, a limit switch 82 is arranged on the outer cylindrical part 64 of safety lock cylinder 60, so that when the rotor 61 is coupled to driver 72, i.e. in the case of manual operation of cylinder lock 60, the geared motor 80 for the motor operation of the lock can be put out of operation.

The construction and operation of the second safety lock cylinder 85 located on the other, and preferably inner, door side are generally the same as the construction and operation of the first safety lock cylinder 60.

The safety lock cylinder 85 has a fixed, outer cylindrical part 86 and a rotor 87 having a key guide 88, the rotor being mounted to rotate in the outer part 86.

A toothed wheel 78 is provided with claws 89, which face claws 91 arranged on a coupling member 90 reciprocable axially with respect to the safety lock cylinder 85. The coupling member 90 is connected to rotate with the rotor 87 but to be axially displaceable with respect to it, by means of a slot 92 and a pin 93 guided in the slot and fixed to the rotor 87. Compression springs 93, 94 are provided between the coupling member 90 and the rotor 87 and these springs aid the coupling function. For producing a coupling connection between the rotor 87 and the toothed wheel 78 fixed to rotate with the shaft 77, it is possible to bring about the engagement of the claws 89 of the toothed wheel 78 with the claws 91 of the coupling member 90 by axial displacement thereof counter to the force of the spring 93.

A cam 95 is provided on the inner circumference of the outer, fixed part 86 of the safety lock cylinder 85, the said cam engaging in a recess 96 in the rotor 87 of the cylinder 85 and allows only axial reciprocation, but no rotation of the rotor 87 in a predetermined length range.

On the inner circumference of each of the outer fixed parts 64, 86 of the two safety lock cylinders 60, 85 there are respective sensors with associated limit switches 82, 83 in operative connection with the geared motor 80, which sense axial movement of the rotors 61, 87 and are used to put the geared motor 80 out of operation in the case of manual operation of the lock.

The lock according to Fig. 3 is operated as follows. In the case of manual operation of the outer or inner cylinder lock 60, 85, in each case one of the two rotors 61, 87 is moved axially inwardly towards the lock case over a predetermined length range with the aid of the key and counter to the force of the spring 71, 94, so that a coupling connection is produced between the rotor 61 and the driver 72 or the rotor 87 and the toothed wheel 78. The geared motor 80 is automatically put out of operation by means of the limit switches 82, 83 during the manual operating process. In motor operation, the rotors 61, 87 are not in coupling connection with driver 72 or toothed wheel 78.

The safety combination locks illustrated have a relatively simple construction and offer a number of possible uses, whilst also offering high security.

Claims

1. A cylinder lock for manual and motor operation, having two axially spaced co-axial outer cylinders, first an second rotor parts each mounted in a respective outer cylinder and key-releasable for rotation with respect to the associated outer cylinder, a rotatable driver operatively connected to a bolt or a catch and connectable to the first rotor part by a first engageable and disengagable coupling, a further rotatable member connected to rotate with the driver and connectable to the second rotor part by a second engageable and disengageable coupling, and a motor for motor operation of the lock, the first rotor part being connected to the driver via the first coupling when a key is used to rotate the first rotor part, the second rotor part being connected to the further rotatable member via the second coupling when a key is used to rotate the second rotor part, and the motor being operatively connected to the further rotatable member during motor operation of the lock.

2. A cylinder lock according to claim 1 having bias means tending to disengage the first and second couplings when the respective rotor part is not being operated by a key.

3. A cylinder lock according to claim 1 or claim 2 which has means to sense engagement of the said couplings.

4. A cylinder lock according to claim 3 which has means to render the motor inoperative when a said coupling is engaged.

5. A cylinder lock according to any one of the preceding claims in which a respective pin slide is mounted in a respective bore in a coupling member of each respective said coupling, subject to a resilient bias, the bore extending transverse to the longitudinal axis of the lock outer cylinder, and each said pin slide being insertable into a depression on the inside of the associated outer cylinder.

6. A cylinder lock according claim 5 in which a respective driving pin is positioned transverse to the longitudinal axis of the lock cylinder in each respective coupling member, each said driving pin being guided in reciprocal manner in a bore arranged transverse to the longitudinal axis of the lock cylinder, and in a predetermined position of the driver or the further rotatable member, respectively, each driving pin faces a respective recess on the inner circumference of the driver or the further rotatable member, respectively.

7. A cylinder lock according to claim 6 in which the pin slides each have a projecting arm.

8. A cylinder lock according to claim 7 in which a respective spring is supported on the end of the projecting arm of each respective pin slide and bears on the associated driving pin.

9. A cylinder lock according to any one of claims 1 to 4 in which the said first coupling comprises engageable and disengageable claws.

10. A cylinder lock according to any one of claims 1 to 4 and 9 in which the said second coupling comprises engageable and disengageable claws.

11. A cylinder lock according to claim 10 as dependant on claim 9 in which a respective abutment is provided on the inner circumference of each said outer cylinder which engages in a respective recess in the respective rotor part and allows axial movement of the rotor part but restrains the rotor part against rotation over a predetermined range of said axial movement.

12. A cylinder lock according to claim 11 in which the said axial movement of the rotor part is accompanied by engagement and disengagement of the respective said claws.

13. A cylinder lock according to any one of the preceding claims in which the further rotatable member is connected to the driver by a shaft.

14. A cylinder lock according to claim 13 in which the shaft is telescopic.

15. A cylinder lock according to any one of the preceding claims which the motor is connectable to the further rotatable member by a third engageable and disengageable coupling.

16. A cylinder lock according to claim 15 in which the said third coupling is electromagnetically operable.

17. A cylinder lock according to any one of claims 1 to 14 in which the motor is connected to rotate with the further rotatable member.

18. A cylinder lock according to any one of the preceding claims in which each said outer cylinder has means to detect the presence of a key or other member inserted into the lock.

19. A cylinder lock according to claim 18 in which the said detection means comprises an operating member with a spring-loaded sensor.

20. A cylinder lock according to any one of the preceding claims in which an operating member with a spring-loaded sensor is provided for a rotary member which is, or is a member which turns with, the driver, and in a predetermined position of the rotary member the sensor moves into a recess on the rotary member and in this position provides a signal for a rest position of the driver.

21. A cylinder lock according to any one of the preceding claims in which the rotor part can be fully radially and axially moved with an authorised key.

22. A cylinder lock substantially as herein described with reference to Figs. 1 and 2 or Fig. 3 of the accompanying drawings.