GB2402165A

GB2402165A - Multi-point locking device with supplementary bolt

Info

Publication number: GB2402165A
Application number: GB0409849A
Authority: GB
Inventors: Michael Winterburn
Original assignee: WINTERFRAMES Ltd
Current assignee: WINTERFRAMES Ltd
Priority date: 2003-05-01
Filing date: 2004-05-04
Publication date: 2004-12-01
Also published as: GB0409849D0

Abstract

A multi-point locking device in which a shaft 10 is operated to linearly move locking lugs 14 is provided with a supplementary bolt member 40 which is mounted onto the shaft 10 to swing out of a slot 38 and engage a keeper. As shown the bolt member 40 has an enlarged head portion 44 which can engage a wider portion of a keeper slot. A narrower portion of the slot receives a main portion 42 of the member 40 and may narrow further to grip the portion 42 when the member 40 is fully engaged.

Description

Locking Devices The present invention relates to locking devices for

windows and doors and in particular, but not exclusively, to locking devices for use with plastic framed windows and doors. Plastic framed window and doors are those with, for a example a frame made from PVC or uPVC and which may be supplied as original or replacement windows and doors or for components of conservatories and the like.

One well known design of locking arrangement 5 for this type of door or window is generally illustrated in Figure 1. The locking arrangement comprises a user operable handle (not shown) which is used to drive a rotatably mounted shaft 10.

Thus turning of the handle by the user turns the shaft 10. Mounted on the shaft is a gearbox 12 which transfers the drive from the shaft 10 to one or more rack and pinion type arrangements (not shown) which convert the rotary motion of the shaft 10 and gearbox 12 into linear motion. A faceplate 16 is usually provided to which the gearbox 12 is attached, the face plate being mounted in use essentially flush with the side edge of the door or window. Each rack of the rack an pinion arrangement drives one or more lugs 14 to move linearly between an open position at which the door or window is free to move on its hinges and a secured position at which (with the window or door in its closed position) the lug or lugs co-operate with suitably shaped features on the door or window frame to retain the door or window in its closed position. The lugs 14 are illustrated in a position intermediate the open and secured positions. The locking arrangement normally further comprises a key-operated lock or the like which locks the locking arrangement in the secured position.

However, such locking arrangements do have disadvantages. One such disadvantage is that the level of security provided by the engagement of the lugs with the features on the frame is sometimes regarded as inadequate. The present invention seeks to alleviate this problem by providing a simple and convenient modification or adaptation of a conventional lock. Specifically the present invention provides an additional locking arrangement which works in association with the conventional locking arrangement to provide an enhanced level of security. The P102512GBI it: .. ::.

. À . . À . additional locking arrangement may be manufactured integrally with the conventional locking arrangement or may be added to a conventional locking arrangement during manufacture of, or fitting to, a door or window.

Accordingly a first aspect of the present invention provides a supplementary securing arrangement for modification of a window or door securing device, the securing device comprising a rotatably mounted useroperated shaft and window or door frame engagement lugs driven by said shaft to execute linear motion, whereby said shaft is moveable in use between a securing position in which said engagement lugs are operatively engaged with securing formations on said frame and an open position at which said lugs are not engaged with said securing formations, the supplementary securing device comprising an arm extending in a substantially radial plane with respect to the shaft and fixedly mounted thereon for rotational movement with the shaft, wherein when said shaft is in the second position the arm is spaced from said frame and when said shaft is in the first position, the arm is operatively receivable in a recess disposed in said frame.

According to a second aspect of the invention there is provided a door or window securing device comprising: i). a rotatably mounted user-operated shaft, ii). window or door frame engagement lugs driven by said shaft to execute linear motion, said shaft being moveable in use between a securing position in which said engagement lugs are operatively engagable with securing formations on said frame and an open position at which said lugs are not engagable with said securing formations, and iii). a supplementary securing device comprising an arm extending in a substantially radial plane with respect to the shaft and fixedly mounted thereon for rotational movement with the shaft, wherein when said shaft is in the second position the arm is spaced from said frame and when said shaft is in the first position, the arm is operatively receivable in a recess disposed in said frame.

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According to a third aspect of the invention there is provided an opening structure comprising: i). a wing component comprising a door or window moveable between open and closed conditions; ii). a wing component frame into which the wing component is received in its closed condition; iii). a wing component securing device comprising: a) a rotatably mounted useroperated shaft; b) wing component frame engagement lugs driven by said shaft to execute linear motion, said shaft being moveable in use between a securing position in which said engagement lugs are operatively engageable with securing formations on said frame and an open position at which said lugs are not engagable with said securing formations, and c) a supplementary securing device comprising an arm extending in a substantially radial plane with respect to the shaft and fixedly mounted thereon for rotational movement with the shaft, wherein, when said shaft is in the open position the arm is spaced from said frame and when said shaft is in the securing position, the arm is operatively receivable in a recess disposed in said frame.

Locking means, such as a key operated lock may advantageously be provided for locking the shaft in its securing position.

For a better understanding of the invention and to show how the same may be carried into effect, reference will be made to the following drawings in which: Figure 1 is a sketch of a prior art securing arrangement, Figure 2 is a sketch of a securing arrangement according to the invention; Figure 3 is a sketch of an arm of the securing arrangement of Figure 2, Figure 4 is a sketch of a housing for receiving the arm of Figures 2 and 3, and P102512GBI À 1 e:: :e: Be: :: ee.

Figure 5 is a simplified end view of a section (profile) of a plastic window, incorporating a locking arrangement of the invention.

Referring in particular to Figures 2 and 5, the supplementary securing device 30 and the lock 5 are mounted in a plastic profile defined by a plurality of plastic webs 70 forming one or more box sections. The supplementary securing device 30 of the invention is mountable on shaft 10 (shown in ghost lines in Figure 2), generally - but not essentially- on the opposite side of gearbox 12 from the user operated handle. One or more securing bolts 72 are used to secure both the lock 5 and the device 30 to the profile defined by the webs 70. The supplementary securing device 30 comprises a housing 32 including a through hole 50 for accommodating the shaft. Housing 32 is attached to a face plate 36 which defines a slot 38 and can include holes 39 for securing screws or the like for attachment of the device to the 1 S door or window. A securing arm 40 is mounted on the shaft 10 for movement with the shaft 10 as the shaft is operated by a user. The arm extends in a radial plane with respec* to the axis of the shaft 10 and movement of the shaft 10 about its axis causes movement of the arm 40 from a position at which it is located in behind the face plate 36, preferably within the housing 32, to a position in which the arm 40 extends out of the housing 32 and face plate 36. Thus, with the arm located behind the face plate 36 it does not obstruct opening and closing of the window or door. When the arm extends out of the housing 32 and face plate 36 it can be received (when the door or window is closed) in a recess or recess formed or mounted in the door or window frame. Opening of the door or window is thus prevented.

Figure 3 illustrates in more detail one example of an arm 40. The arm 40 includes sides 42 and an enlarged head portion 44. At the end of the arm 40 distant from the enlarged head portion 44 mounting means 46 are provided by means of which the arm 40 is locatable on the shaft and retained in the housing 32. The mounting means 46 include a bore 48 which is shaped to conform to the shape of the shaft 10. In the illustrated example the shaft 10 and bore 48 are of square cross section.

The housing 32 includes a pair of oppositely disposed circular holes 50 centred on P102512GBI :: . . :. .: À À e c the intended axis of the shaft 10 which holes 50 receive correspondingly sized upstanding cylindrical formations 52 of mounting means 46, whereby the arm 40 is retained in the housing.

Preferably the recess in the door or window frame is formed by a housing 60 (see Figure 4) mountable in the door or window frame and defining a void 62 into which the arm 40 is receivable. The housing preferably includes a face plate 64 which includes an aperture in the form of a slot 66 into which the arm 40 passes in use.

The slot 66 is preferably sized so that its lateral dimension conforms with that of the arm 40. The slot 66 may be slightly wedged so that its sides are not exactly parallel. Thus the width of the slot 66 becomes narrower in the direction in which the arm 40 enters the slot 66 so that as the arm 40 approaches the extremity of its movement the sides of the slot 66 engage the sides 42 of the arm 40. A portion 68 of the slot 66 may be wider to accommodate entry of the enlarged head portion 44 of the arm 40.

Thus the invention provides a supplementary locking device which is mountable on a common shaft 10 with the conventional locking arrangement and acts in combination with the conventional locking arrangement to provide enhanced security. Manufacturers of windows and doors have the option of purchasing a conventional locking arrangement, possibly substituting an extended shaft 10, and adding the supplementary locking device according to the invention to achieve an enhanced level of security in a simple and cost effective manner. Alternatively, the conventional locking arrangement can be modified in manufacture to include the supplementary locking device according to the invention so that the two locking arrangements are supplied as one unit, thereby also providing a simple and cost effective enhanced level of security.

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Claims

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À . . . À Claims 1. A supplementary securing arrangement for modification of a window or door securing device, the securing device comprising a rotatably mounted user operated shaft and window or door frame engagement lugs driven by said shaft to execute linear motion, whereby said shaft is moveable in use between a securing position in which said engagement lugs are operatively engaged with securing formations on said frame and an open position at which said lugs are not engaged with said securing formations, the supplementary securing device comprising an arm extending in a substantially radial plane with respect to the shaft and fixedly mounted thereon for rotational movement with the shaft, wherein when said shaft is in the open position the arm is spaced from said frame and when said shaft is in the securing position, the arm is operatively receivable in a recess disposed in said frame.
2. A door or window securing device comprising: i). a rotatably mounted user-operated shaft, ii). window or door frame engagement lugs driven by said shaft to execute linear motion, said shaft being moveable in use between a securing position in which said engagement lugs are operatively engageable with securing formations on said frame and an open position at which said lugs are not engagable with said securing formations, and iii). a supplementary securing device comprising an arm extending in a substantially radial plane with respect to the shaft and fixedly mounted thereon for rotational movement with the shaft, wherein, when said shaft is in the open position the arm is spaced from said frame and when said shaft is in the securing position, the arm is operatively receivable in a recess disposed in said frame.
3. An opening structure comprising: i). a wing component comprising a door or window moveable between open and closed conditions; P102512GB1 e be: . :. ac: e.

À . . À . . . ii). a wing component frame into which the wing component is received in its closed condition; iii). a wing component securing device comprising: a) a rotatably mounted user-operated shaft; S b) wing component frame engagement lugs driven by said shaft to execute linear motion, said shaft being moveable in use between a securing position in which said engagement lugs are operatively engageable with securing formations on said frame and an open position at which said lugs are not engagable with said securing formations, and c) a supplementary securing device comprising an arm extending in a substantially radial plane with respect to the shaft and fixedly mounted thereon for rotational movement with the shaft, wherein, when said shaft is in the open position the arm is spaced from said frame and when said shaft is in the securing position, the arm is operatively receivable in a recess disposed in said frame.
4. A supplementary securing arrangement as claimed in claim 1 or a door or window securing device as claimed in claim 2 or an opening structure as claimed in claim 3 further comprising a key-operated lock for locking the shaft in the securing position.
5. A supplementary securing arrangement as claimed in claim or 4 or a door or window securing device as claimed in claim 2 or 4 or an opening structure as claimed in claim 3 or 4 wherein said arm comprises a relatively narrow shank portion and a relatively enlarged head portion.
6. An opening structure as claimed in claim 5 further wherein said recess in said frame comprises a slot having, along at lea* part of its length a width greater than the width of said shank portion of the arm and less than the width of said head portion of the arm.
7. An opening *ructure as claimed in claim 6 wherein the sides of said slot are wedged.

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8. A supplementary securing arrangement as claimed in claim 1 or a door or window securing device as claimed in claim 2 or an opening structure as claimed in claim 3 substantially as hereinbefore described with reference to any of Figures 2 to 5.

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