AU2005203686B2

AU2005203686B2 - A mortice lock

Info

Publication number: AU2005203686B2
Application number: AU2005203686A
Authority: AU
Inventors: David Lumby
Original assignee: Dormakaba Australia Pty Ltd
Current assignee: Dormakaba Australia Pty Ltd
Priority date: 2004-09-13
Filing date: 2005-08-17
Publication date: 2006-08-31
Anticipated expiration: 2025-08-17
Also published as: AU2005203686A1

Description

A MORTICE LOCK STechnical Field The present invention relates to locks and more particularly but not exclusively to mortice locks.

Background of the Invention Described in Australian Patent 753964 is a mortice lock. This mortice lock has a 00 "handing" cylinder that when moved angularly can inhibit operation of one or both of the Cc handles associated with the lock.

C A disadvantage of the above mentioned mortice lock is that if incorrectly installed, the lock can inadvertently be arranged in an "unlocked" configuration providing Ci free access through the associated door.

Object of the Invention It is the object of the present invention to overcome or substantially ameliorate the above disadvantage.

is Summary of the Invention There is disclosed herein a lock for a door mounted in a door jamb, the lock having: a lock body; a lock tongue mounted in the body for substantially linear movement in a direction between a retracted position at which the tongue is at least substantially located within the body, and an extended position at which the tongue projects from the body to engage the doorjamb; a tongue actuator mounted in the body and including a first actuator member for angular movement about an axis generally normal to the direction of movement of the tongue, the first actuator member being operable to move the tongue from the extended position to the retracted position, and a second actuator member mounted in the body for angular movement about said axis to move the tongue from the extended position to the retracted position, said first actuator member being operable from a first side of said body and therefore a first side of said door, and the second actuator member being operable from an opposite side of said body and therefore an opposite side of said door; and -1- [R:\LIBTT]03806speci.doc: KEH a disabling assembly selectively operable to prevent actuation of both actuator 0 members, or prevent actuation of a selected one of said actuators, said disabling assembly

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Sincluding a first handing member angularly movable about a handing axis, said handing Saxis being generally transverse of the tongue direction of movement, said first handing s member being movable between a first position preventing movement of said first actuator to move the tongue from the extended position to the retracted position, and a second position providing for movement of said first actuator member to move the tongue IN0 from the extended position to the retracted position, a second handing member angularly IN movable about said handing axis between a first position preventing movement of the 1o second actuator member to move the tongue from the extended position to the retracted position, and a second position providing for movement of said second actuator member to move the tongue from the extended position to the retracted position.

Preferably, said first handing member and said second handing member are each radially elongated relative to said handing axis.

is Preferably, said disabling assembly includes: a disabling slide movable in a direction, generally normal to the direction of movement of the tongue, between a first position allowing movement of both actuator members to retract the tongue, and a second position locating the handing members so that the handing members are operable to prevent movement of the actuator members.

Preferably, the disabling slide is movable generally linearly between the first and second positions thereof.

Preferably, the handing members are engagable with the lock body to prevent angular movement of the handing members when the slide is in the slide second position.

Preferably, the lock includes a lock cylinder to cause movement of the slide.

Preferably, each of the handing members is movable between a fixed portion and an adjustment position, with the handing members when in the fixed position being prevented from moving between the handing member first and second positions, while when the adjustment position, the handing members can be moved between the handing member first and second positions.

Preferably, the handing members are moved through 1800 about the handing axis to be moved between the handing members first and second positions.

Preferably, the slide has a slot operatively associated with each handing member, each slot having a linear portion within which the associated handing member is engaged when in the fixed position.

-2- R: I B3Tr103 86speci.doc: KEFH Preferably, when either handing member is in the adjustment position, the

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O associated linear portion is not engaged thereby providing for movement of the handing Smember between the handing member first and second positions.

Brief Description of the Drawings Ir 5 A preferred form of the present invention will now be described by way of example with reference to the accompanying drawings wherein: Figure 1 is a schematic isometric view of a mortice lock; 00 00 Figure 2 is a schematic parts exploded isometric view of the lock of Figure 1; Figure 3 is a schematic isometric view of a disabling assembly employed in the lo lock of Figure 1; Figure 4 is a schematic enlarged isometric view of portion of the disabling assembly of Figure 3; Figure 5 is a schematic side elevation of the lock of Figure 1; Figure 6 is a schematic enlarged side elevation of the portion of the lock as shown in Figure Figure 7 is a schematic isometric view of portion of the lock of Figure 1 with the lock tongue in an extended position; Figure 8 is a schematic isometric view of the lock as shown in Figure 7 with the tongue in a retracted position; Figure 9 is a schematic isometric view of the disabling assembly of Figures 3 and 4 together with the lock tongue actuator; Figure 10 is a schematic parts exploded isometric view of the disabling assembly of Figures 3 and 4; Figure 11 is a schematic isometric view of the tongue and actuator therefore of the lock of Figure 1; Figure 12 is a schematic parts exploded isometric view of the tongue of the lock of Figure 1; Figure 13 is a schematic isometric view of the tongue and actuator of the lock of Figure 1; Figure 14 is a schematic top plan view of the tongue of Figure 12; and Figure 15 is a schematic isometric view of a modification of the lock of Figures 1 to 14.

-3- [R:\LI BTT03806speci.doc:KEH Detailed Description of the Preferred Embodiment In the accompanying drawings there is schematically depicted a mortice lock ,I The mortice lock 10 includes a hollow body 11 having a front wall 12 through which a lock tongue 13 may project. The lock tongue 13 is slidably guided for linear movement between an extended position (as shown in Figures 1 and at which the tongue 13 engages a door jamb having a striker member 14, and a retracted position at least substantially contained within the body 11 (as shown in Figure 8).

00 The tongue 13 is movable from the extended position to the retracted position by 00 INO operation of a pair of cylinder locks 15 of which only one is illustrated. Each cylinder 1 O lock 15 is operatively associated with a respective side of the door so that the cylinder locks 15 are located on opposite sides of the door.

The tongue 13 can also be retracted by handles. For example, a handle may be provided on both sides of the door, or alternatively on only one side. The handle/s each have a square shaft that engages an actuator 16. The actuator 16 includes two actuator members 17 and 18 which are angularly movable about an axis 82 that extends generally normal to the direction of arrow 83 of the tongue 13. Each of the actuator members 17 and 18 is operatively associated with a respective one of the handles. More particularly each actuator member 17 and 18 has a respective arm 19 or 20. The arms 19 and 20 each extend from a respective hub 21, each hub 21 being provided with a generally square central aperture 22 that receives a correspondingly shaped shaft extending to the adjacent handle, one handle operating the member 18 and the other handle operating the member 17. Located between the members 17 and 18 is a disc 23 that is received within a correspondingly shaped aperture in the members 17 and 18 to maintain them aligned while providing for angular relative movement therebetween.

The arms 19 and 20 when moved angularly toward the rear wall 24 of the housing 11, engage the tongue 13 to move the tongue to the retracted position. Each of the actuator members 17 and 18 has a projection 25 that is engaged by a bracket 27 against which a spring 26 is urged. The spring 26 via the bracket 27 urges the members 17 and 18 to move angularly in the direction of the arrow 28, that is to move to a position at which the tongue 13 is movable to the extended position. The bracket 27 includes an elongated portion that passes through the spring 26 to engage within an eyelet 86 so that the spring 26 is maintained in a compressed condition urging the bracket 27 to cause the angular movement of the members 17 and 18.

-4- [R:\LIBTT]03806speci.doc:KEH IND The lock 10 further includes an auxiliary tongue assembly 29. The auxiliary tongue assembly 29 includes an auxiliary tongue 30 that engages a projection 87 of tongue 13 so as to be moved thereby from an extended position to a retracted position when the tongue 13 is being moved to the retracted position. The auxiliary tongue 30 is fixed to a bracket 31 having a flange 32 with an aperture through which a shaft 33 of the tongue 30 projects. The bracket 31 is also provided with a cam portion 34.

Operatively associated with the auxiliary tongue assembly 29 is a deadlock IND assembly 35. The assembly 35 includes a dead lock lever 36 pivotally mounted for IND angular movement about a shaft 37. Bearing against the lever 36 is a bias member 38 that receives a spring 39. The spring 39 passes over the shaft 33 and is compressed between the bracket 31 and an internal surface of the member 38. Accordingly the spring 39 urges (Ni the auxiliary tongue 30 to the extended position and urges the lever 36 to pivot upward to engage a step 40 which is part of the tongue 13. The lever 36 has a laterally extending arm 41 that engages an incline cam surface of the cam 34 so that as the bracket 31 moves the auxiliary tongue 30 to the extended position, the lever 36 is pivoted downward so as to be removed from engagement with the step 40. Accordingly when the auxiliary tongue is in the extended position, the tongue 13 is not prevented by the tongue 30 from moving to the retracted position. However when the auxiliary tongue 30 is in the retracted position and the tongue 13 in the extended position (that is with the tongues 13 and 30 engaged with the striker plate 14), the lever 36 is engaged with the step 40 thereby preventing movement of the tongue 13 to the retracted position.

The tongue 13 is an assembly including a forward portion 42 that has a ramp surface 43 that engages the striker plate 14. Attached to the forward portion 42 are first and second tongue base portions 44 and 45. The portions 44 and 45 have apertures 46 through which a shaft 47 of the forward portion 42 projects. More particularly the shaft 47 has an aperture 48 through which a pin 49 passes to secure the forward portion 42 to the base portion 44.

The base portion 45 includes a cam 50 that engages the arm 41 to move the lever 36 to a position clear of the step 40. In this respect it should be appreciated the portion is movable in the direction of the arrow 83 relative to the portion 44.

Operatively associated with the tongue 13 is a first spring 51 that abuts the forward portion 42 and is compressed to urge the tongue 13 to the extended position. The spring 51 is received over a pin 53 that extends through a bracket 54 and flange 57 fixed to the body 11. Associated with the base portion 45 is a further compressed spring R:\LIBTT]03 8O6speci.doc: KEH with spring 55 bearing against the flanges 81 and bracket 54. The spring 51 is

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O compressed against the flange 57 that is fixed to the body 11. The bracket 54 is pressed against flange 56.

Operatively associated with the tongue 13 is the cylinder locks 15. Each cylinder lock 15 has a cam member 58 that is moved angularly about the axis 59 of the cylinder lock 15 by operation of a key. When the cam member 58 moves in the direction of the arrow 60 the extremity 87 of the cam member 58 engages the flange 56 and causes IDrearward movement of the base portion 45 relative to the base portion 44. This causes 00 INDcompression of the spring 55 and engagement of the cam 50 with the arm 41 so that the S O10 lever 36 is pivoted from the step 40. Thereafter further movement of the cam member 58 moves the base portion 44 rearwardly so as to retract the tongue 13.

The lock 10 further includes a disabling (handing) assembly 61. The assembly 61 is operable to permit movement of both members 17 and 18 or alternatively selectively engage one or both the members 17 or 18 to prevent movement thereof to retract the Is tongue 13.

The assembly 61 includes a slide 62 guided for sliding linear movement in a direction generally normal to the direction of movement of the tongue 13 (arrow 83). The slide 62 is movable between a first position (as shown in Figure 7) and a second position (as shown in Figure In the second position both members 17 and 18 are operable, that is they can be caused to move angularly by either handle to retract the tongue 13. In the first position of the slide 62, the assembly 61 can be configured to again allow movement of both members 17 or 18 or may engage one or both of the members 17 and 18.

The assembly 61 includes first and second levers (handing members) 63 and 64 that are independently angularly movable about a handing axis 65 that extends generally normal to the direction of movement of the slide 62 and also generally normal to the direction of arrow 83 of the tongue 13. Each lever 63 and 64 is pivotally mounted in the slide 62 and is operable by use of a screw driver engaging a slot 66 in the respective lever 63 or 64. Accordingly the levers 63 and 64 can be positioned to engage or not engage the associated members 17 or 18. Each lever 63 and 64 is radially elongated so as to project from the axis Slidably mounted in the slide 62 is a "kick out" member 67 that is movable transverse of the direction of movement of the slide 62 between a first position and a second position. In the first position (as shown in Figure 3) the member 67 is engagable with a rearwardly projecting cam 68 of the base portion 44. When the tongue 13 is -6- R:\LI BTT]03 806speci.doc: KEH moved to the retracted position the cam 68 engages the member 67 to cause the assembly O 61 to move to the position of Figure 8 so that both members 17 and 18 are free for C movement. Accordingly when a door having the lock 10 is moved to the closed position, the user cannot inadvertently close the door and have the lock 10 lock the door closed.

s However the assembly 61 can be configured so that the tongue 13 cannot move N the slide 62 to the position of Figure 8. This is achieved by lateral movement of the member 67. More particularly the member 67 is slidably mounted in the slide 62 for INO movement in a direction transverse of the movement of the slide 62. The member 67 is 00 IND provided with an aperture that receives a locating ball 72 urged outwardly by a spring 69 also located in the aperture in the member 67. The ball 72 engages locating recesses 70 in the slide 62 so that the member 67 is retained in the appropriate position, that is either Sengaging or not engaging with the cam 68.

The levers 63 and 64 are mounted in the slide 62 by means of a pin 73 received in passages 74 of each lever 63 and 64. The levers 63 and 64 are also separated by means IS of a flange 75 through which the pin 73 passes via a passage 76. Springs 77 are located between the levers 63 and 64 and adjacent flanges 89 of the slide 62 to retain the levers 63 and 64 in a desired location. More particularly the levers 63 and 64 have flat portions 79 that engage the associated spring 77 so as to retain the lever 63 and 64 in the desired position.

As best seen in Figure 9, the lever 63 is positioned to engage the member 17 by abutting a step 80 of the member 17 to thereby prevent movement of the member 17 to retract the tongue 13. However the member 18 is free for movement so that upon actuation of the associated handle, the tongue 13 can be retracted providing it is free for movement, that is it has been released by the lever 36. In that respect when either of the members 17 or 18 is moved to retract the tongue, the projections 19 engage the base portion 45 to cause rearward movement thereof This rearward movement of the base portion 45 causes the cam 50 to engage the arm 41 to move the lever 36 to a position clearing the step 40. Accordingly the handles are free to retract the tongue 13.

The slide 62 further has an abutment 81 that is engaged by the cam 58 to move the assembly 61 to the position as shown in Figure 8, that is a position allowing movement of both members 17 and 18 irrespective of the orientation of the levers 63 and 64.

In respect of the cam 58, cams of different lengths may be employed on different sides of the door. For example on one side of the door a shorter cam 58 may be employed -7- [R:\LIBTTIO3806speci .doc:KEH that merely operates the slide 61 and does not operate the tongue 13. On the other side of

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O the door a longer cam 58 could be employed that retracts the tongue 13 and does not I operate the slide 61. Typically the longer cam 58 would be manipulated by a cylinder lock on the outside of the door while the shorter cam 58 would be operated by a cylinder s lock on the inside of the door.

,I In respect of the above described preferred embodiment, the hollow body 11 has two side walls 78 and 79 each having an aperture 82 providing access to the slots 66 to N0 provide for operation of the lever 63 and 64 from their respective sides of the lock 0 IND However in the embodiment of Figure 15 each lever 64 has extending from it an

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O elongated projection 83 containing the slot 66. Each projection 83 is operatively associated with a respective one of the slots 82. Each slot 82 includes an enlarged portion 84 that is generally circular in configuration and a generally linear portion 85. Each projection 83 has arcuate ends 86 to cooperate with the configuration of the enlarged portion 85. Each projection 83 and therefore the lever 63 or 64 thereof is locatable in two is positions, that is, the position provided by the enlarged portion 84 (adjustment position) and the position provided by the linear portion 85 (fixed position). When the projection 83 is located in the enlarged portion 84, it can be rotated about the axis 65 to locate the lever 63 or 64 in the appropriate position. Thereafter the projection 83 is moved down into the linear portion 85 so that the lever 63 or 64 is maintained in that desired position.

The projection 83 is moved through 1800 to locate the arms 63 and 64 in the positions previously described. In respect of moving the projection 83 between the slot portions 84 and 90, this movement is achieved by movement of the assembly 61, that is, the slide 62.

By having the projection 83 firmly held in the linear portion 85, the levers 63 and 64 cannot be altered in their position unless the assembly 61 is moved so that the projection 83 is located in the portion 84. In this embodiment the handing axis 65 passes centrally through the portion 84.

-8- [R:LIBTTJ03806spec .doc:KEH

Claims

2. The lock of claim 1, wherein said first handing member and said second handing member are each radially elongated relative to said handing axis.
3. The lock of claim 1 or 2, wherein said disabling assembly includes: a disabling slide movable in a direction, generally normal to the direction of movement of the tongue, between a first position allowing movement of both actuator members to retract the tongue, and a second position locating the handing members so that the handing members are operable to prevent movement of the actuator members. -9- R:LI B TT]03 806speci.doc: KEH
4. The lock of claim 3, wherein the disabling slide is movable generally O linearly between the first and second positions thereof. The lock of claim 3 or 4, wherein the handing members are engagable with the lock body to prevent angular movement of the handing members when the slide s is in the slide second position. S6. The lock of claim 3, 4 or 5, wherein the lock includes a lock cylinder to cause movement of the slide. IO 7. The lock of anyone of claims 3 to 6, wherein each of the handing IND members is movable between a fixed portion and an adjustment position, with the handing members when in the fixed position being prevented from moving between the handing member first and second positions, while when the adjustment position, the N handing members can be moved between the handing member first and second positions.
8. The lock of any one of claims 3 to 7, wherein the handing members are moved through 1800 about the handing axis to be moved between the handing members first and second positions.
9. The lock of claim 7 or 8, wherein the slide has a slot operatively associated with each handing member, each slot having a linear portion within which the associated handing member is engaged when in the fixed position. The lock of claim 9, wherein when either handing member is in the adjustment position, the associated linear portion is not engaged thereby providing for movement of the handing member between the handing member first and second positions.
11. A lock for a door mounted in a door jamb, substantially as herein described with reference to Figures 1 to Dated: 25 May, 2006 Kaba Australia Pty Limited Patent Attorneys for the Applicant/Nominated Person SPRUSON FERGUSON IBTT03806speci doc:KEH