GB2056540A

GB2056540A - Fastening for sliding doors and windows

Info

Publication number: GB2056540A
Application number: GB7928157A
Authority: GB
Original assignee: Schlegel UK Ltd; Schlegel Ltd
Current assignee: Schlegel UK Ltd; Schlegel Ltd
Priority date: 1979-08-13
Filing date: 1979-08-13
Publication date: 1981-03-18
Also published as: IT1132558B; GR69847B; JPS5628979A; EG14904A; IT8024136A0; GB2056540B; ES8104481A1; ES494187A0

Abstract

A flush-mounted fastening for sliding doors and windows has a fastening bolt which is operated by an integral push-button 19 which only projects from a face plate of a casing of the mechanism when the bolt is in its withdrawn, inoperative position. The push-button 19 is biased to its projecting position and there is another push button 35, 37 which causes a spring-loaded slider 23, which latches the push-button 19 in its fastening portion by engagement at 27, 29 to move to a release position so that the bolt 17 can spring back to its withdrawn position, shown. <IMAGE>

Description

SPECIFICATION Combination handle and lock for sliding doors and windows This invention relates to the combination of handle and lock mechanism for sliding doors and windows. The mechanism is designed for operation from one side of the door or window only, normally from the inside, and it is designed to be mounted in the middle of the style.

According to the present invention we provide a combination handle and lock mechanism for a sliding door or window comprise a casing, a bolt movable in the casing between a projecting locking position and a withdrawn inoperative position, the casing being adapted to be mounted on a face of the door or window and having a handle slidably mounted relative thereto between a withdrawn position, which it occupies, preferably flush with the outer face of the casing, when the bolt is in its locking position, and a projecting position, the casing also supporting a bolt releasing device which preferably does not project from the outer face of the casing, actuation of the bolt release device causing the bolt to be moved to its withdrawn inoperative position and the handle to be moved to its projecting position.

Preferably, the handle also comprises an operating device for moving the bolt to its projecting locking position. Preferably, the bolt projects from the rear face of the handle and is mounted for sliding movement in an aperture in the rear of the casing in a direction normal to the rear face of the casing, the handle being mounted in an aperture in the front face of the casing.

Preferably, two coil springs provide a spring bias for biasing the handle to its projecting position and the boltto its inoperative position, the coil springs having one end bearing againstthe rearofthe casing and the opposite end being located in a recess in the rear face of the handle.

Preferably, the bolt release device includes a separate push button slidably mounted within the casing in a direction at right angles to the front face ofthe casing, under the bias of a coil spring. Preferably, the bolt release device includes a slider slidably mounted within the casing in a direction parallel to the front and rear faces of the casing, the slider being biassed to a position in which it holds the bolt in its operative locking position, the arrangement being such that when the push button is operated, the slider will be moved against its spring bias to release the bolt and allow into move to its withdrawn inoperative position.

Preferably, the slider has a latching surface engageable with a co-operating latching surface on the handle and a first cam surface which co-operates with a further cam surface on the handle, movement of the handle into the casing to move the bolt member to its operating position causing cooperation between the first and further cam surfaces to slide the slider against its spring bias to enable snapping engagement between the two latching surfaces.

Preferably, a second cam surface is also provided on the sliderwhich is engageable with a cam surface on the bolt release device so that when the bolt release device is operated, the second cam surface and cam surface on the bolt release device will move into engagement thus causing the slider to move against its spring bias thereby moving the latching surfaces on the handle and slider out of engagement with each other to allow the bolt to move to its withdrawn inoperative position under its spring bias.

A combination handle and door lock mechanism for sliding doors and windows is now described by way of example with reference to the accompanying drawings, in which: FIGURE 1 is a front view of a casing; FIGURE 2 is a section through the casing and associated locking mechanism and handle, and FIGURE 3 is an exploded internal view of the mechanism, the left hand portion being a front view of the rear plate of the casing and slider and the right hand portion being a rear view of the face plate of the casing, bolt release device, bolt and handle.

Referring to the drawings, the mechanism has a casing 1 made up of a face plate 3 and a rear plate 5 attached to the rear of the face plate 3 by means of screws shown schematically at 7. Two countersunk screw apertures 9 are provided in the face plate 3 to enable the face plate to be flush mounted in the rear face of a sliding door or window, e.g. a patio door.

An aperture 11 for a combination handle and bolt actuating device and a further aperture 13 for a push button bolt releasing device are provided in the face plate 3. The rear plate 5 has a circular aperture 15 therein through which a locking bolt 17 projects.

The locking bolt 17 projects from the rear face of a handle 19 which is slidably mounted in the casing 1 in a direction at right angles to the face plate 3 and which is biased by coil springs 21 to a position in which it projects through the aperture 11 in the face plate 3 as shown in Figure 2, in which the bolt 17 is in a withdrawn inoperative position. As shown in Figure 2, the coil springs 21 have one end bearing against the rear plate 5 and their opposite ends are housed in apertures in the rear face of the handle 19.

Also slidably mounted within the casing 1, but in a direction at right angles to the direction of movementofthe handle 19, and parallel to the front and rear faces ofthe casing 1, is a slider 23. The slider 23 is biased by a coil spring 25 having one end bearing against a top wall ofthe casing 1 and its opposite end located in an aperture in the slider 23 to a position in which a latching surface 27 on the lower end ofthe slider can engage with a co-operating latching surface 29 provided on one face of a projection on the upper rear corner ofthe handle 19.

These two latching surfaces 27 and 29 will engage with each other when the handle 19 is pushed into the casing so that its front face does not project beyond the front face of the face plate 3, against the bias ofthe coil springs 21. In moving the handle 19 from the full line position shown in Figure 2to its flush position and the operative position of the bolt 17 as shown in outline, a force is applied to the front face of the handle 19 so that it moves into engagement with a first cam surface 31 on the lower face ofthe slider 23. This first cam surface 31 is inclined and a further inclined cam surface 33 is provided on the rear upper face of the projection on the handle 19, the arrangement being such that when the two cam surfaces move into engagement with each other, the slider 23 will be moved from the position shown in Figure 2 against the bias of the coil spring 25.Continued movement of the handle 19 will eventually cause the two cam surfaces to move past each other, whereupon the coil spring 25 will cause the slider to spring back to the position shown in Figure 2 so that its latching surface 27 will engage with the co-operating latching surface 29 on the handle 19, thus locking the handle in its fully withdrawn position and the bolt 17 into its extend operative position.

A push button bolt releasing device 35 having a serrated front face 37 is slidably mounted in the aperture 13 in the face plate 3 towards and away from the rear plate 5 and is biased to its inoperative position shown in Figure 2 by a coil spring 39, one end of which bears against the rear plate 5 and the other end of which is located in a recess in the rear face of the push button release device 35. When the bolt is in its projecting locking position as shown in chain line in Figure 2 and it is desired to release the bolt to its full line position shown in Figure 2, a force is applied to the serrated front face 37 ofthe push button bolt releasing device 35 causing the device 35 to move against the bias of the coil spring 39.A second inclined cam surface 41 is provided on an upper face of a recess 43 in the slider 23 with which a cam surface 45 on an upper rearface of the releasing device 35 engages. When the device 35 is pushed inwardly against the bias of its spring 39, the cooperating cam surfaces 41 and 45 will cause the slider 23 to move upwardly in the casing from the position shown in Figure 2, against the bias ofthe spring 25 so as to move the co-operating latching surfaces 27 and 29 out of engagement with each other th us allowing the springs 21 to move the bolt 17 to its withdrawn position and causing the handle to move outwardly to project through the aperture 11 in the face plate 3 ofthe casing. This of course will then allow a door or window to which the combination handle and lock mechanism is fitted to be opened.

It will be appreciated that a keep member would be mounted on the frame of the door orthe window and would have either a hook projection or an eyelet type profile which would be engaged by the bolt 17 when it is moved to its projecting locking position. A machined hole would be produced within the leading edge of the lock style into which this keep member would project and when the bolt member on the mechanism is locked, it would course locate within the keep member thus locking the sliding door or window in a closed position.

Of course, in order to open the door or window, the push button release device 35 would be operated, thus allowing the bolt to be released and causing the handle to project outwardly of the casing whereupon the handle can be gripped and the door or window duly slid open.

It will thus be appreciated that the present invention provides a combination handle and lock mechanism for a sliding door which, when the door is locked, is fully recessed in the rear face of the door but which, when the lock mechanism is released, will have a projecting handle which can be grasped to move the doorto an open position.

Claims

1. A combination handle and lock mechanism for a sliding door or window comprising a casing, a bolt movable in the casing between a projecting locking position and a withdrawn inoperative position, the casing being adapted to be mounted in a face ofthe door or window and having a handle slidably mounted relative thereto between a withdrawn position which it occupies when the bolt is in its locking position and a projecting position, the casing also supporting a bolt releasing device, actuation of the bolt release device causing the bolt to be moved to its withdrawn inoperative position and the handle moved to its projecting position.

2. A combination handle and lock according to claim 1 which is adapted to have the front face of its casing mounted flush with a door or window to which it is to be fitted, the handle being flush with the front face when the bolt is in its locking position.

3. A combination handle and lock according to claim 1 or 2 wherein the handle also comprises an operating device for moving the bolt to its projecting locking position.

4. A combination handle and lock according to claim 1, 2 or 3 wherein the bolt projects from the rear face of the handle and is mounted for sliding movement in an aperture in the rear of the casing in a direction normal to the rear face of the casing, the handle being mounted in an aperture in the front face ofthe casing.

5. A combination handle and lock according to any one of claims 1-4 wherein two coil springs provide a spring bias for biasing the handle to its projecting position and the bolt to its inoperative position, the coil springs having one end bearing against the rear of the casing and the opposite end being located in a recess in the rear face of the handle.

6. A combination handle and lock according to any one of claims 1-5 wherein the bolt release device includes a separate push button slidably mounted within the casing in a direction at right angles to the front face of the casing, under the bias of a coil spring.

7. A combination handle and lock according to claim 6 wherein the bolt release device includes a sliderslidably mounted within the casing in a direction parallel to the front and rear faces ofthe casing, the slider being biased to a position in which it holds the bolt in its operative locking position, the arrangement being such that when the push button is operated, the slider will be moved against its spring bias to release the bolt and allow it to move to its withdrawn inoperative position.

8. Acombination handle and lock according to claim 7 wherein the slider has a latching surface engageable with a co-operating latching surface on the handle and a first cam surface which co-operates with a further cam surface on the handle, movement ofthe handle into the casing to move the bolt member to its operating position causing cooperation between the first and further cam surfaces to slide the slider against its spring bias to enable snapping engagement between the two latching surfaces.

9. A combination handle and lock according to claim 8 wherein a second cam surface is provided on the slider which is engageable with a cam surface on the bolt release device so that when the bolt release device is operated, the second cam surface and cam surface on the bolt release device will move into engagement thus causing the slider to move against its spring bias thereby moving the latching surfaces on the handle and slider out of engagement with each other to allow the boltto move to its withdrawn inoperative position under its spring bias.

10. A combination handle and door lock mechanism for sliding doors and windows substantially as hereinbefore described with reference to the accompanying drawings.

New claims or amendments to claims filed own 17 July 1980.

Superseded Claim 1.

New or amended claims:- Claim 1.

1. A combination handle and lock mechanism for a sliding door or window comprising a casing, a bolt slidably movable in the casing between a projecting locking position and a withdrawn inoperative position, the casing being adapted to be mounted in a face of the door or window and supporting a handle slidably movable with the bolt between a withdrawn position which it occupies when the bolt is in its locking position and a projecting position when the bolt is withdrawn, the casing also supporting a separate and manually operable bolt releasing device, actuation of the bolt release device causing the bolt to be moved to its withdrawn inoperative position and the handle to be moved to its projecting position.