IE57453B1

IE57453B1 - Fastener

Info

Publication number: IE57453B1
Application number: IE195486A
Authority: IE
Original assignee: Hardware & Systems Patents Ltd
Priority date: 1985-08-06
Filing date: 1986-07-23
Publication date: 1992-09-09
Also published as: GB2179091B; GB8519687D0; GB8617349D0; GB2179091A; AU6042886A; NZ217097A; IE861954L; AU581598B2

Abstract

A fastener for a door, window and the like includes an element slidable between fastened and unfastened positions in which a catch member 10 on the element is engageable with and disengageable from a keeper. The element is slidable from one side of the door by means of finger hold 19 and from the other side of the door by a rack and pinion mechanism 41,42 operable by a drive member 50 actuated by a cylinder lock 49. A selective locking action whereby the fastener may be operated from said one side even when locked from the other side is provided by arranging for the cylinder lock 49 to lock the drive member 50 in an angular position in which the drive member 50 is isolated from the rack and pinion mechanism permitting manual sliding of the element through the finger hold 19.

Description

This invention relates to fasteners for closure members such as doors, windows and the like and in particular, though not exclusively, to fasteners for f closure members mounted for sliding movement between 1 open and closed positions. 1 Fasteners which are operable to provide a fastening action from both sides of a closure member and which can be locked in a fastened position are known. Generally, however, when locked in the fastened position, the fastener cannot be operated from either side of the closure member.

A selective locking action whereby the fastener may be locked in the fastened position from one side, usually the outer side, whilst still permitting operation of the fastener from the other side may be provided but the operating mechanisms are complex, costly to manufacture and assemble and, are often of a size that cannot easily be fitted in a limited space.

It is an object of the present invention to provide a fastener having a selective locking action which overcomes the problems and disadvantages aforementioned.

According to the present invention a fastener for a closure member such as a door, window and the like comprises an element adapted to be mounted on a first frame member for limited sliding movement between a fastened position and an unfastened position, a keeper * adapted to be mounted on a second frame member, a catch member on the element for engagement and disengagement with the keeper in the fastened and unfastened positions respectively, means operable from one side of the closure member for sliding the element between the -3fastened and unfastened positions, a rotatable drive member adapted to be mounted on the first frame member and operable from the other side of the closure member, a rack on the element, a pinion engageable with the rack and rotatable by the drive member on rotation of the drive member in opposed senses for sliding the element between the fastened and unfastened positions, and means for locking the drive member in an angular position which permits sliding movement of the element between the fastened and unfastened positions from said one side of the closure member.

By the instant invention, a fastener is provided which can be operated from both sides of the closure member and which can be operated from said one side at all times even if the drive member for operating the fastener from the other side has been locked.

Such operation is achieved by transmitting the drive from the drive member to the element through a rack and pinion and arranging for the drive member to be locked in a position in which it is isolated from the pinion to allow normal operation of the fastener from said one side.

By the use of a rack and pinion, the forces applied to the element on rotating the drive member act in the direction of sliding movement of the element so * that a smooth and positive action is obtained which is reliable in service.

The element conveniently comprises an elongate bar mounted on the rear surface of one of two opposed face plates and has a formation received in an opening in the face plate for the user to slide the bar between the fastened and unfastened positions. -4Preferably the drive member is mounted on a barrel of a cylinder lock mounted on the other face plate and , the barrel is rotatable by a key, the key being removable to lock the drive member only when the drive 'i member is rotated to the required angular position to isolate it from the pinion. In this way the drive member cannot be locked in a position in which operation of the fastener from said one side of the closure member would be prevented.

The drive member and pinion preferably have formations, for example a lobe and a lug, which are engaged on rotation of the drive member in opposed senses for sliding the element between the fastened and unfastened positions and are disengaged in the locked position of the drive member to permit rotation of the pinion for operation of the fastener from said one side of the closure member.

Preferably the pinion lug is rotated through 90° between the fastened and unfastened positions of the element and the drive member lobe has an arcuate extent of less than 180°.

Advantageously, the fastener includes means for retaining the element in a selected position. Such means is conveniently provided by a friction pad acting on the element under the biassing of a spring. In this way the element is frictionally retained in any selected position.

Preferably, means is provided for locking the ί element in the fastened position from said one side of the closure member. Such means conveniently has a profiled end portion received in a shaped key-way in the element and rotatable In the fastened position of the element to lock the element -5and prevent operation of the fastener from the other side of the closure member. In this way the fastener Is positively locked from said one side providing additional security to that obtained when the drive member is locked with the element in the fastened position.

The invention will now be described in more detail, by way of example only, with reference to the accompanying drawings wherein:FIGURE 1 is a perspective view of a fastener according to the present Invention; FIGURE 2 is an exploded perspective view of the main parts of the fastener shown in Figure 1; FIGURE 3 is a view of the fastener of Figures 1 and 2 with parts omitted for clarity showing the element in the unfastened position; FIGURE 4 is a view similar to Figure 3 showing the element in the fastened position; and FIGURES 5,6,7 and 8 are schematic views showing the relative positions of the drive member and pinion for various operating conditions of the fastener.

Referring first to Figures 1 to 4 of the accompanying drawings, there is shown a fastener 1 for a closure member such as a door or window (not ehown) mounted for sliding movement relative to a fixed frame (not shown).

The fastener 1 has inner and outer rectangular face plates 2 and 3 respectively which, in use, are flush mounted in opposed relationship on the inner and outer sides of the closure member. The marginal edge of each face plate 2,3 is seated in a respective peripheral rebate portion of a rectangular opening in the closure member and the face plates 2,3 are secured -6( together by means of a pair of screws 4 (one only shown) Inserted through respective holes 5 in the inner face plate 2 and engaging aligned tapped holes 6 in the outer face plate 3.

Each face plate 2,3 has a respective recessed · handle pull 7 by means of which the user can grip and slide the closure member relative to the fixed frame * to open/close the closure member from either side.

An element consisting of bar 8 is slidably mounted on the rear surface 9 of the inner face plate 2 and has a catch member 10 for engagement or disengagement with a keeper 11 mounted on the fixed frame.

The catch member 10 is of laminate construction for extra strength and comprises two hook-shaped plates 12 mounted on a boss 13 on the bar 8 and secured by a screw 14 engagaging a tapped hole 15 in the boss 13. The plates 12 are locked against rotation by respective projections 16 which locate in a groove 17 in the bar 8. The plates 12 form a hook 18 which projects laterally outwards between the face plates 2,3 for engagement or disengagement with the keeper 11.

The bar 8 also has a pair of transverse ribs providing a finger hold 19 received in a rectangular aperture 20 in the inner face plate 2 for operation of the fastener from the inner side of the closure member.

The ribs are engageable with the respective opposed ends of the aperture 20 to limit sliding movement of the bar 8 between an unfastened position shown in Figure 3 and a fastened position shown in Figure 4. -7The bar 8 is frictionally retained in any selected position by means of a friction pad 21 acting on one end of the bar 8 under the resilient biassing of a spring 22. An upstand 23 on the rear surface 9 of the inner face plate 2 extends through a rectangular cutout 24 in the end of the bar 8 and locates the friction pad 21 and spring 22. The lateral edges 25 of the bar 8 are slidably received in respective channels 26 in the friction pad 21 to provide the frictional restraint to sliding movement of the bar 8.

A locking device 27 mounted on the inner face plate 2 is operable from the inner side of the closure member to lock the bar 8 in the fastened position. The locking device 27 comprises a flat disc 28 having a transverse rib 29 on one side and a cylindrical shank 30 on the other side terminating in an end portion 31 of rectangular cross-section.

The disc 28 is rotatably mounted in an annular recess 32 in the front surface 33 of the inner face plate 2. A projection (not shown) in the base of the recess locates in an arcuate cut-out 34 in the underside of the disc to limit rotation of the disc to 90°.

The shank 30 extends through a hole 35 in the face plate 2 and the rectangular end portion 31 is received in a shaped key-way in the bar 8. The locking device 21 is retained in position by means of a lock washer 36 mounted on the shank 30.

The key-way comprises an elongate narrow slot 37 terminating at one end in an enlarged hole 38. The dimensions of the slot 37 and hole 38 are such that the rectangular end portion 31 of the shank is freely rotatable in the hole 38 but only enters the slot 37 -8when the long sides of the end portion 31 are parallel to the sides of the slot 37 as shown in Figure 3.

The rectangular end portion 31 of the shank enters the key-way hole 38 when the bar 8 is moved to the fastened position. To lock the bar in the fastened position, the disc 28 is rotated through 90° from the position shown in Figure 3 so that the long sides of the rectangular end portion 31 are transverse to the sides of the slot 37 as shown in Figure 4 preventing entry of the rectangular end portion 31 into the slot 37. In this way sliding movement of the bar 8 is precluded and the bar 8 is locked in the fastened position until the disc 28 is rotated back to the position shown in Figure 3.

The key-way slot 37 opens at the other end into an oval cut-out 39 in the bar 8. The cut-out 39 is provided along one long side with teeth 40 forming a rack 41. A pinion 42 rotatably mounted on a cylindrical stud 43 on the rear surface 9 of the inner face plate 2 is received within the oval cut-out 39 and has teeth 44 engageable with the rack teeth 40. The pinion 42 has an.upstanding lug 45 projecting towards the outer face plate 3 and the pinion teeth 44 extend over an angle of 90° around the pinion 42 such that sliding movement of the bar 8 between the unfastened position of Figure 3 and the fastened position of Figure 4 is accompanied by rotation of the pinion 42 and hence the lug 45 through 90°.

A cylinder lock 46 operable by a key 47 is mounted in a bore 48 in the outer face plate 3 for operation of the fastener 1 from the outer side of the closure member. The lock 46 has a barrel 49 rotatable by means of the key 47 and a drive member 50 is mounted on the -9inner end of the lock barrel 49 for rotation therewith. The drive member 50 has a cylindrical boss 51 which locates in a cylindrical bore 52 in the pinion 42 and an arcuate lobe 53 projecting towards the inner face plate 2.

The lobe 53 extends over an angle of slightly less than 180° around the drive member 50 and is engageable with the pinion lug 45 to operate the rack 41 and pinion 42 on rotation of the drive member 50 in a counterclockwise direction to slide the bar 8 to the unfastened position and in a clockwise direction to slide the bar 8 to the fastened position.

The relative positions of the drive member lobe 53 and the pinion lug 45 obtained on rotating the drive member 50 to slide the bar 8 to the unfastened and fastened positions are shown in Figures 5 and 6 respectively.

The drive member 50 is rotatable through 90° from the positions shown in Figures 5 and 6 to an intermediate position shown in Figures 7 and 8 respectively in which the key 47 may be removed to lock the barrel 49 and drive member 50 against rotation.

The key 47 can only be removed at the intermediate position of the drive member 50 and consequently the drive member cannot be locked at any other angular position.

By virtue of the angular extent of the drive member lobe 53 and pinion lug 45, such rotation of the drive member 50 to the intermediate position occurs without rotating the pinion 42 and hence the bar 8 remains in the unfastened and fastened positions respectively. -10Additionally, in the intermediate position of the drive member 50, the drive member lobe 53 does not restrict rotation of the pinion lug 45 through 90° as occurs on operation of the fastener 1 from the inner i· side of the closure member as previously described.

Accordingly, as will now be appreciated, the bar 8 may be slid to the fastened position from the outer side of the closure member by rotation of the drive member 50 using the key 47 and the drive member 50 locked in the intermediate position to prevent operation of the fastener 1 from the outer side of the closure member whilst still permitting operation of the fastener 1 from the inner side of the closure member.

Such operation is assured by arranging that.the key 47 can only be removed when the drive member 50 is at the intermediate position.

By the use of the rack 41 and pinion 42 for transmitting the drive on operation of the fastener 1 from the outer side of the closure member, the forces applied to the bar 8 act only in the direction of sliding movement of the bar 8 so that a smooth and positive action is obtained which precludes any risk of the bar 8 jamming or excessive wear on the components.

It will be understood that the fastener according to the present invention Is of compact and slim construction which is easily mounted on a frame section of similar width by forming openings to receive the face plates and the hook.

The fastener is especially suited for mounting on ‘ the hollow frame sections of extruded metal, plastics or metal/plastics composite as commonly now used for constructing the frames of sliding doors and windows.

Such use is not exclusive, however, and the fastener may also be mounted on timber frame sections. -11The invention is not limited to the embodiment above-described for example, the keeper may be mounted on the closure member and the catch member and operating mechanism therefor mounted on the fixed frame.

The spring loaded friction pad for retaining the bar in any selected position may be replaced by any suitable means, such as a resilient detent, for retaining the bar in one or both of the fastened and unfastened positions.

The locking device for locking the fastener from the inner side of the closure member may be of any suitable type.

The cylinder lock may be replaced by any appropriate device capable of rotating the drive member and being locked in a position which isolates the drive member from the rack and pinion to permit operation of the fastener from the inner side of the closure member.

Finally, although the fastener has been described with reference to a closure member mounted for sliding movement relative to a fixed frame, it will be appreciated that the fastener may be adapted for use with a closure member mounted for hinged or pivotal movement relative to a fixed frame. Additionally the fastener may be adapted for use with two closure members mounted for relative sliding, hinged or pivotal movement.

Claims

Claims:

1. A fastener for a closure member such as a door, window and the like comprises an element adapted to be mounted on a first frame member for limited sliding movement between a fastened position and an unfastened position, a keeper adapted to be mounted on a second frame member, a catch member on the element for engagement and disengagement with the keeper in the fastened and unfastened positions respectively, means operable from one side of the closure member for sliding the element between the fastened and unfastened positions, a rotatable drive member adapted to be mounted on the first frame member and operable from the other side of the closure member, a rack on the element, a pinion engageable with the rack and rotatable by the drive member on rotation of the drive member in opposed senses for sliding the element between the fastened and unfastened positions, and means for locking the drive member in an angular position which permits sliding movement of the element between the fastened and unfastened positions from said one side of the closure member.

2. A fastener according to claim 1 wherein the drive member is mounted on a barrel of a cylinder lock for locking the drive member in said angular position.

3. A fastener according to claim 2 wherein the barrel is rotatable by a key and the key is removable to lock the drive member only when the drive member is in said angular position.

4. A fastener according to any one of the preceding claims wherein the drive member and pinion have formations which are engaged on rotation of the drive -13member in opposed senses for sliding the element between the fastened and unfastened positions and are disengaged when the drive member is in said angular position.

5. A fastener according to claim 4 wherein the formations comprise a lobe on the drive member and a lug on the pinion.

6. A fastener according to claim 5 wherein the lug is rotated through 90° between the fastened and unfastened positions and the lobe has an arcuate extent of less than 180°.

7. A fastener according to any one of the preceding claims including means for retaining the element in a selected position.

8. A fastener according to claim 7 wherein the retainer means comprises a friction pad acting on the element under the biassing of a spring.

9. A fastener according to any one of the preceding claims including a device for locking the element in the fastened position from said one side of the closure member.

10. A fastener according to claim 9 wherein the locking device has a profiled end portion engageable in a shaped key-way in the element.

11. A fastener according to claim 10 wherein the profiled end portion is rectangular and the key-way comprises an elongate narrow slot terminating in an enlarged hole, the end portion being rotatable between a first position in which the end portion is retained in the enlarged hole to lock the element and a second position in which the end portion is slidable lengthwise of the slot to permit sliding movement of the element between the fastened and unfastened positions. -1412. A fastener according to any one of the preceding claims wherein the element and drive member are each mounted on a respective one of two opposed face plates adapted to be mounted on opposed sides of the first frame member.

12. 13. A fastener according to claim 12 wherein the face plates are adapted to be flush mounted.

13. 14. A fastener according to claim 12 or claim 13 wherein each face plate has a recessed handle pull.

14. 15. A fastener according to any one of claims 12 to 14 wherein the element is slidably mounted on.the rear surface of the associated face plate and has a formation received in an opening in the face plate for manually sliding the element between the fastened and unfastened positions.

15. 16. A fastener- according to claim 1 substantially as hereinbefore described with reference to the accompanying drawings.

16. 17. A fastener according to any one of the preceding claims in combination with the first and second frame members.

17. 18. The combination according to claim 17 wherein the first frame member comprises a closure member and the second frame member comprises a fixed frame on which the closure member is mounted for hinged, pivotal or sliding movement.

18. 19. The combination according to claim 17 wherein the first and second frame members each comprise a respective closure member with the closure members being mounted for hinged, pivotal or sliding movement relative to each other.

19.

20. The combination according to claim 18 or claim 19 wherein the or each closure member comprises a door or window. -15

21. The combination according to any one of claims 17 < to 20 wherein the drive member is operable from that side of the closure member which in use faces s outwardly. Dated this the 23rd day of July, 1986 F. R. KELLY & CO. BY: VVflM A EXECUT IVE 27 Clyde Road^Befilsbridge, Dublin 4