WO2021212178A1

WO2021212178A1 - Corner transfer linkage

Info

Publication number: WO2021212178A1
Application number: PCT/AU2021/050363
Authority: WO
Inventors: Michael Alchin; Isaac Yeshouroun; Kewen Zhou
Original assignee: Alchin Long Group IP Pty Limited
Priority date: 2020-04-24
Filing date: 2021-04-23
Publication date: 2021-10-28
Also published as: AU2021258696A1

Abstract

The invention provides a corner transfer linkage (10) for a window or door panel, particularly for pivoted widows such as awning or casement windows, and more particularly for a securing system thereof where activation movements and loads are required to be transferred around a corner of intersecting frame members. The corner transfer linkage (10) comprises a first slider (12) to be slidably mounted on a first track for movement along said first track, a second slider (13) to be slidably mounted on a second track for movement along said second track, with said first track inclined to the second track by an internal corner angle (α), and a substantially inflexible interconnecting rocker member (13) pivotally connected to each slider (11, 12) at respective first and second pivot joints (17, 18) to pivot about respective first and second pivot axes (P1, P2), so as to extend between the sliders. Slidable movement of said first slider (11) along said first track causes slidable movement of the second slider (12) along said second track. The invention extends to a securing system including the corner transfer linkage (10) and a window or door panel including said securing system.

Description

CORNER TRANSFER LINKAGE

Field

[0001] The present invention relates to movable panel securing mechanisms, particularly multipoint securing mechanisms for securing windows and doors.

Background

[0002] Pivotally mounted window and door assemblies include a frame to which there is pivotally attached a pivoted panel or sash, typically comprising a glass panel housed in a sash frame formed of sash members.

[0003] In awning windows, the pivoted panel is hingedly attached adjacent an upper sash member and pivots about a generally horizontal axis, whereas casement windows pivot about a vertical sash member.

[0004] It is common to secure the pivoted window (and door) panels with a securing mechanism to restrain the panel in a predetermined position commonly a closed position. However, in the case of some windows, such as large pivoted window panels, securing the window at a single point on the frame may be insufficient to restrain the window adequately. For instance, if a person leans against the window at a location remote from the latch or due to high wind loads commonly experience elevated widows of ulti-level buildings.

[0005] It is therefore desirable, and in some instances, it is a regulatory requirement, for windows to have multiple securing point spaced around the window panel. However, securing at multiple points require each point to be activated individually and it is not uncommon for users to activate only one securing point out of convenience.

[0006] It is also known to provide multi-point securing systems having multiple securing mechanisms connected to and operable from a single actuator mechanism. One example latch mechanism adaptable as a multi-point securing system is disclosed in Australian Patent Application 2016204675 herein incorporated by reference. Such multipoint securing systems require transmission of actuation forces from the actuator mechanism to each securing mechanism around the window panel. This may present a challenge when it is desired to retain the actuator transmission mechanism within the confines of the sash members at the perimeter of the window panel particularly when the actuating mechanism and securing mechanism are positioned on adjacent sash members. Existing systems struggle to distribute operating forces smoothly around the perimeter of the sash with minimal frictional losses.

[0007] It is an object of the present invention to overcome or ameliorate at least one of the disadvantages of the prior art, or to provide a useful alternative.

Summary of Invention

[0008] In a first aspect, there is provided a comer transfer linkage for a panel, the comer transfer linkage comprising: a first slider to be slidably mounted on a first track for movement along said first track; a second slider to be slidably mounted on a second track for movement along said second track, with said first track inclined to the second track by an internal comer angle; a substantially inflexible interconnecting rocker member pivotally connected to each slider at respective first and second pivot joints to pivot about respective first and second pivot axes, so as to extend between the sliders; wherein slidable movement of said first slider along said first track causes slidable movement of the second slider along said second track.

[0009] Unless the context clearly requires otherwise, throughout the description and the claims, the words “comprise”, “comprising”, and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is to say, in the sense of “including, but not limited to”.

[0010] The invention is particularly for pivoted widows such as awning or casement windows, and more particularly for a securing system thereof where activation movements and loads are required to be transferred around a comer of intersecting frame members.

[0011] In certain embodiments, the first track is associated with a first peripheral edge of the panel and the second track is associated with a second peripheral edge of the panel, said second peripheral edge be adjacent to the first peripheral edge. [0012] In certain embodiments, opposing ends of the rocker member are pivotally connected to respective proximal ends of each slider.

[0013] In certain embodiments, the first slider includes a first connecting formation for facilitating connection of the first slider to an actuator mechanism and/or a latch mechanism.

[0014] Preferably, the first connecting formation and the first pivot joint are spaced apart by a distance and wherein the distance is adjustable.

[0015] In certain embodiments, the first slider comprises a proximal body supporting said first pivot joint and distal body supporting said first connecting formation, each of the proximal and distal bodies to be slidably mounted on the first track for movement along said first track and wherein said proximal body is connected to said distal body by an adjustable connector for adjusting separation of the bodies and thereby the distance between first connecting formation and the first pivot joint.

[0016] In certain embodiments, the preceding claims wherein the internal comer angle is 90 degrees.

[0017] In certain embodiments, each pivot axis is orthogonal to the first and second tracks.

[0018] Preferably, the first slider includes an elongate body.

[0019] In certain embodiments, the second slider includes an elongate body.

[0020] In certain embodiments, the first and second tracks are associated with respective first and second sash members of a door or window panel frame.

[0021] In certain embodiments, the sash members include an euro groove or a C groove.

[0022] In certain embodiments, the preceding claims wherein the panel is a door or window panel.

[0023] In a second aspect, there is provided a securing system for a panel, the panel movable between a first and second positions with respect to a supporting structure, the securing system comprising: an actuator mechanism disposed on a peripheral portion of the panel and having an actuator for operating the securing system; a securing mechanism disposed on a second peripheral portion of the panel, said securing mechanism having a securing member for engaging a complementary receiver on supporting structure to retain the panel in a predetermined position; a corner transfer linkage including: a first slider to be slidably mounted on a first track for movement along said first track; a second slider slidably mounted on a second track for movement along said second track, with said first track inclined to the second track by an internal corner angle; a substantially inflexible interconnecting rocker member pivotally connected to each slider at respective first and second pivot joints to pivot about respective first and second pivot axes, so as to extend between the sliders; wherein slidable movement of said first slider along said first track causes slidable movement of the second slider along said second track; a first connecting member connecting the actuator mechanism to the first slider; and a second connecting member connection the second slider to the securing mechanism.

[0024] In certain embodiments the securing system includes a locking or latching member such as a catch or a locking bolt or lock pin.

[0025] In certain embodiments the panel is a door or window panel.

[0026] Preferably, the interconnecting rocker member is substantially rigid.

[0027] In a third aspect, there is provided a window or door panel including a comer transfer linkage, the corner transfer linkage comprising: a first slider to be slidably mounted on a first track for movement along said first track associated with a first peripheral edge of the panel; a second slider to be slidably mounted on a second track for movement along said second track associated with a second peripheral edge of the panel, with said first track inclined to the second track by an internal corner angle; a substantially inflexible interconnecting rocker member pivotally connected to each slider at respective first and second pivot joints to pivot about respective first and second pivot axes, so as to extend between the sliders; wherein slidable movement of said first slider along said first track causes slidable movement of the second slider along said second track.

[0028] In another aspect, there is provided a corner transfer linkage for a panel, the corner transfer linkage comprising: a first slider to be slidably mounted on a first track for movement along said first track; a second slider to be slidably mounted on a second track for movement along said second track, with said first track inclined to the second track by an internal comer angle; a substantially inflexible interconnecting rocker member having a first and second spaced end portions connected to each slider at respective end portions thereof so as to extend between the sliders; wherein an end portion of the rocker member is rotatable with respect to the first or second slider; and wherein slidable movement of said first slider along said first track causes slidable movement of the second slider along said second track.

[0029] [0025] In certain embodiments, respective end portions of the first and second sliders are rotatable with respect to the rocker.

[0030] Preferably, the corner transfer linkage includes a flexible member joining an end of one or both of the first and second sliders to a respective end or ends of the rocker member.

[0031] In certain embodiments, the preceding claims wherein the interconnecting rocker member is substantially rigid..

Brief Description of Drawings

[0032] Preferred forms of the present invention will now be described by way of example with reference to the accompanying drawings wherein:

[0033] Figure l is a perspective view of a corner transfer linkage in accordance with an embodiment of the invention; [0034] Figure 2 is an exploded perspective view of the comer linkage of Figure 1;

[0035] Figures 3 A and 3B are side views of the corner linkage shown in Figure 1 attached to a comer portion of a euro groove frame for a window panel showing the linkage in first and second position;

[0036] Figure 4 is a side view of the corner linkage shown in Figure 1 detached from a comer portion of an euro groove frame for a window panel shown in Figures 3A and 3B;

[0037] Figure 5 is a top view of Figure 4;

[0038] Figure 6 is a front view of Figure 4;

[0039] Figure 7 is a rear view of Figure 4;

[0040] Figures 8A and 8B are side views of the corner linkage shown in Figure 1 detached from the corner portion of a euro groove frame for a window panel shown in Figures 3 A and 3B show steps for attaching the linkage to the frame;

[0041] Figure 9 is a perspective view of a corner transfer linkage in accordance with another embodiment of the invention;

[0042] Figures 10A - 10 D are respective side, front, rear and bottom views of the corner transfer linkage shown in Figure 9;

[0043] Figure 11 is an exploded perspective view of the corner linkage of Figure 9;

[0044] Figure 12A is a side view of the comer linkage shown in Figure 9 attached to a comer portion of a euro groove frame for a window panel;

[0045] Figure 12B is a front view of Figure 12A;

[0046] Figure 12C is a detailed view of view of Figure 12B;

[0047] Figure 12D is atop view of Figure 12A; [0048] Figure 13 is a perspective view of a portion of a window panel and panel securing system including the corner transfer linkage shown in Figure 9;

[0049] Figure 14 is a partially exploded perspective view of Figure 13;

[0050] Figure 15 is another exploded perspective view of Figure 13;

[0051] Figure 16 is a partially exploded perspective view of a corner transfer linkage in accordance with a further embodiment of the invention;

[0052] Figure 17 is a front view of a frame window panel having a euro groove including the comer linkage shown in Figure 16;

[0053] Figure 18 is a detailed view of view of comer B of Figure 17;

[0054] Figure 19 is a perspective view of comer B of Figure 17;

[0055] Figure 20 is another perspective view of the comer transfer linkage shown in Figure 16 showing an adjustment tool in engagement with the threaded connector for lengthwise adjustment of the displacement between a proximal pivot joint and the respective connecting formation; and

[0056] Figure 21 is a partially exploded perspective view of the corner linkage shown in Figure 18.

Description of Embodiments

[0057] In Figures 1 to 9 of the accompanying drawings there is schematically depicted a corner transfer linkage 10 for transferring actuator motion of a panel securing system.

[0058] The invention will be described herein with respect to mounted window assemblies including a window frame defining an opening, to which there is pivotally attached a pivoted panel or sash, typically comprising a glass panel housed in a perimeter sash frame formed of sash members. In this embodiment, the pivotally mounted window is an awning window wherein the window panel is hingedly mounted to pivot about an upper horizontal sash member (top rail). An actuator mechanism, including a handle for operating the securing system is provided in a lower sash member (bottom rail) of the window panel. At least one securing mechanism is provided an upright sash member (stile) for engaging a complementary receiver on an associated upright frame member of the window frame to retain the window in a closed position. The securing mechanism may include a variety of latching or locking configurations including a pin, bolt or latch. The system may be biased to the secured position for instance, so as to be self latching or require positive actuation to engage the latch/lock. In any event, actuation inputs from a handle of the actuator mechanism to engage and/or disengage the securing mechanism are passed to the securing mechanism by means of an interconnected linkage including a corner transfer linkage 10.

Referring to Figure 1, the comer transfer linkage 10 includes a first slider 11, a second slider 12 and a rocker member 13 interconnecting the first slider 11 and second slider 12 at respective ends of the rocker member 13. The first and second slider 11 and 12 each include an elongate body (14 & 15 respectively), each body having one end portion proximal to and pivotally connected to the rocker member and another end portion distal to the rocker member. In this embodiment, the first slider body 14 is notably shorter that the second slider body 15 which accommodates a slide limit feature, however in other embodiments the slider bodies may be the same or more similar in length. The rocker member 13 is inflexible or substantially inflexible and has a comparatively arcuate body 16 with a convex side facing outward with respect to the panel and corner and a concave side facing inwards. The rocker member 13 is so curved sufficiently to avoid interference with the outside apex of the frame. By “inflexible” or “substantially inflexible”, it is meant that the rocker member will undergo minimal elastic deformation when subjected to the activation forces the linkage is designed to transfer, and will return to its original shape when activation forces are released. Preferably, however, the rocker member 13 is rigid or substantially rigid. As used herein, the terms “rigid” or “substantially rigid,” in addition to any standard dictionary definitions, are meant to also include the characteristic of an object or material to substantially hold its shape when under loads of normal operation, but wherein the shape may be altered if subjected to increased loads beyond typically expected. The amount of increased load needed to alter the shape of the object or material may depend on the application desired for the rocker member and other elements of the linkage and may vary from application to application. Preferably the other elements of the linkage including the sliders are also substantially inflexible and more preferably substantially rigid. [0059] The first slider 11 is configured for longitudinal slidable motion along first axis A1 defined by a first linear track associated with a respective first sash member 81 of the window panel frame. The second slider 12 is configured for longitudinal slidable motion along second axis A2 defined by a second linear track associated with a respective second sash member 82.

[0060] The first and second sash members 81 and 82 meet to form a window corner C such that the first and second axes (A1 and A2 respectively) intersect at an internal comer angle a. Figures 3 A, 3B and 4 display one corner portion 80 of the window panel sash. It will be appreciated that in the case of a square window as is shown in this embodiment, the first and second axes, and first and second sash members are perpendicular to one another. It is within the scope of the invention to accommodate widow corners having internal angles a other than 90 degrees, particularly obtuse internal angles.

[0061] Rocker member 13 is connected to respective proximal ends of each slider by means of first and second joints 17 and 18 at respective end portions 17a and 18a of the rocker member 13. Preferably, and in this embodiment each joint 17 and 18 are pivot joints including a respective pivot axis PI and P2 perpendicular (shown as b) to both the first and second axes (A1 and A2).

In this embodiment, as is best seen with reference to Figure 2, each pivot joint is a clevis joint comprising a fork end 19 disposed at a respective end portion 17a and 18a of the rocker member 13 arcuate body 16 and a respective eye 20 located at respective proximal ends of the first and second sliders. A rivet pin 21 passes through aligned apertures in each fork and eye thereby providing for pivoting motion of the joint. In some embodiments one or both joints 17 and 18 may take the form of a flex joint allowing relative rotation of an end portion of the rocker to a respective end portion of one or both of the first and second sliders. Such flex joints may include a flexible member joining an end of one or both of the first and second sliders to a respective end or ends of the rocker member.

[0062] As can be seen with reference to Figure 3 A and 3B, when assembled and each slider (11 and 12) is engaged on a respective track, each pivot joint 17 and 18 is confined to travel along or at least parallel to, the first and second axes A1 and A2 respectively. According sliding movement of first slider 11 along first track as indicated by arrow 31 will cause the second slider 12 to slide along the transverse second track indicated by arrow 32. That is to say, horizontal movement of the first slider 11, right as illustrated on the page will result in vertical movement of the second slider 12 up on the page while horizontal movement of the first slider 11, to the left as illustrated on the page will result in vertical movement of the second slider 12 down on the page. Conversely up /down movement of the second slider will cause a resultant right/left movement of the first slider. It will be appreciated however that due to relative geometries, the movement of each of the sliders are generally not directly proportional in terms of relative displacement and velocity.

[0063] Each of the first and second sliders (11 and 12) include a connecting formation 35 disposed at the distal end for connection to an actuator mechanism and/or a latch mechanism, typically by means of transmission rods. Each connecting formation 35 takes the form of an aperture 36 and a connecting pin 37 received and fixed in the aperture 35 to which each rod may be connected by means of a receiving aperture in an end portion of the rod. In use, actuation inputs from the actuator mechanism are passed via a first transmission rod to the first slider 11, transferred via the rocker member 13 to the second slider 12 and then to the latch mechanism by means of a second transmission rod. In this regard the sliders 11, 12 and in particular the rocker member 13 are substantially rigid on application of any predesigned forces applied through the comer linkage. Due to the offset pivot axes PI and P2 the rocker member is subjected to a larger bending moment than the sliders during operation and therefore typically requires a higher relative strength, stiffness and or area moment of inertia.

[0064] In this embodiment, the corner linkage 10 is intended to be used with a “Euro Groove” or “C groove” window sash extrusion wherein the window frame sash members are provided with an outward facing mounting rail or track. More particularly, the first and second sliders (11, 12) are configured to be mounted in the groove of the Euro Groove sash members. That is to say, in this embodiment the sash members 81 & 82 provide the respective first and second tracks on which the sliders move. As is best seen in Figures 4 - 7, which display a corner portion 80 of a window panel sash, each euro groove frame member 81 & 82 comprises a pair of longitudinal channels 83 which together form a respective track. A corresponding pair of runners are disposed on the body of each slider and configured to be received in the channels 83 of each sash member so as to co-operatively retain each slider whilst allowing for relative sliding motion.

The runners are in the form of a pair of parallel longitudinally orientated elongate ribs 38 projecting from opposite sides of the respective slider body.

[0065] Sliding movement of the linkage 10 is restricted by retainer 40 acting on one of the sliders. In this embodiment the retainer is associated with the second slider. The retainer 40 includes a stem 41 and guide cap 42. The stem 41 is configured to be received within an elongate, longitudinally extending aperture 43 in the second slider body and fixed to the track by threaded fastener 45 passing through a central bore 44 in the stem 41. Abutment of either end of the elongate aperture 43 against the stem 41 restricts movement of the second slider 13 along the track thereby preventing over extension of the linkage 10. Together with the guide cap 42, the retainer 40 retains and guides the second slider 13 and prevents the linkage inadvertently sliding out of the track during installation, repair, maintenance or replacement. To accommodate the elongate aperture 43 and retainer 40 between the proximal and distal ends of the second slider, the second slider body is notably longer than the first slider body.

[0066] A pair of complementary stop faces 49 are also provided on each of the first slider 11 and the rocker member 12 to prevent over rotation of the rocker in use as can be seen in Figure 3A. The stop surfaces also may be used as an alignment guide during installation to assist with aligning the rocker member with respect to the corner.

[0067] The procedure for installing the corner linkage into the window panel frame is illustrated in Figures 8A and 8B. First, the second slider 12 is inserted into the groove of the second sash member 82 so that the elongate ribs 38 locate within the longitudinal channels 87. The second slider is raised so that the first slider 11 may be inserted into the groove of the first sash member 81, again so that the elongate ribs 38 locate within the longitudinal channels 87. The intersecting first and second sash members are clipped at the outside apex of the corner so as to provide access to the channels 87 formed in the euro groove extrusion.

[0068] Once the second slider is inserted into the second track, the stem 41 of the retainer 40 may then be inserted through elongate aperture 43 in the second slider and fixed by threaded fastener 45 into a pre-drilled aperture 47 in the second sash member 82. This step may be performed either prior to, or following, insertion of the first slider into the first track. With the retainer 40 fixed to the second sash member 82, the second slider 12 is retained in the vertical second track. In installations where the second sash member 82 is vertically orientated as shown in Figure 8A, it will be appreciated that the retainer prevents the second member sliding out of the second track at the lower open corner 80 under the weight of the linkage if the first slider is not retained in the first track. Thus, the retainer 40 reduces the likelihood of components being dropped during installation, repair, maintenance, replacement or retro-fitment of the linkage, which is an important safety consideration where the linkage is to be installed in an outward opening panel in an elevated location.

[0069] Another embodiment of the invention is shown in Figures 9, 10A - 10D, 11, and 12A - 12D. In this embodiment corner transfer linkage 110 includes a first slider 111, a second slider 112 and a rocker member 113 interconnecting the first slider 111 and second slider 112. The first and second slider 111 and 112 each include a respective elongate body 114 and 115, each body having one end proximal to and connected to the rocker member 113 and another end distal to the rocker member. In this embodiment, the first and second slider bodies are comparatively reduced in thickness and preferably formed from metal, or aluminum. It will be appreciated for instance that the slider body may be manufactured from stamped metal plate.

[0070] As in the first embodiment the rocker member 113 is substantially rigid and has a comparatively arcuate body 116 with a convex side facing outward with respect to the panel and comer and a concave side facing inwards. In this embodiment the rocker member 113 includes rib formations 127 to enhance stiffness and resistance to bending forces.

[0071] The first slider 111 is configured for longitudinal slidable motion along first axis B1 defined by a first linear track associated with a respective first sash member 181 of the window panel frame. The second slider 112 is configured for longitudinal slidable motion along second axis B2 defined by a second linear track associated with a respective second sash member 182.

[0072] The first and second sash members 181 and 182 meet to form a window corner Cl such that the first and second axes (B 1 and B2 respectively) intersect at an internal comer angle a. Figures 12A to 12D display one corner portion 180 of the window panel sash. It will be appreciated that in the case of a square window as is shown in this embodiment, the first and second axes, and first and second sash members are perpendicular to one another. Internal angles a other than 90 degrees, particularly obtuse internal angles are within the scope of the invention.

[0073] Rocker member 113 is pivotally connected to proximal ends of each slider by means of first and second pivot joints 117 and 118 each joint having a pivot axis Q1 and Q2 perpendicular (shown as b) to both the first and second axes B1 and B2 as can be seen in Figure 10A to 10D. As is best seen with reference to the exploded view in Figure 11, each pivot joint is a clevis joint comprising a fork end 119 and a respective eye 120. In this embodiment the body 116 of the rocker member 113 includes an eye 120 for locating in a fork end 119 formed in the proximal end of the second slider 112, and a fork end 119 for receiving an eye block 122 attached to the proximal end of the first slider 111. Eye block 122 includes a locating formation in the form of a pair of protrusions 123 which are to be located in a corresponding locating formation in the proximal end of the first slider in the form of a pair of apertures 124. In each case a rivet pin 121 passes through aligned apertures in each fork and eye thereby providing for pivoting motion of the joint.

[0074] With reference to Figure 12A to 12D, when assembled and each slider (111 and 112) is engaged on a respective track, each pivot joint 117 and 118 is confined to travel along or at least parallel to, the first and second axes B1 and B2 respectively. According sliding movement of first slider 111 along first track as indicated by arrow 131 will cause the second slider 112 to slide along the transverse second track indicated by arrow 132. That is to say, horizontal movement of the first slider 111, right as illustrated on the page will result in vertical movement of the second slider 112 up on the page while horizontal movement of the first slider 111, to the left as illustrated on the page will result in vertical movement of the second slider 112 down on the page. Conversely up /down movement of the second slider will cause a resultant right/left movement of the first slider. It will be appreciated however that due to relative geometries, the movement of each of the sliders are generally not directly proportional in terms of relative displacement and velocity.

[0075] Each of the first and second sliders (111 and 112) include a connecting formation 135 disposed at the distal end for connection to an actuator mechanism and/or a latch mechanism, typically by means of transmission rods. Each connecting formation 135 takes the form of an aperture 136 for receiving a connecting pin 137 to which each rod may be connected. In use, actuation inputs from the actuator mechanism are passed via a first transmission rod to the first slider 111, transferred via the rocker member 113 to the second slider 112 and then to the latch mechanism by means of a second transmission rod. In this regard the sliders 111, 112 and the rocker member 113 are substantially rigid on application of any predesigned forces applied through the corner linkage. Since the rocker member is subjected to a larger bending load, due relative misalignment of the pivots, its strength and rigidity are typically more critical. [0076] In this embodiment, the corner linkage 110 is intended to be used with a “Euro Groove” or “C groove” window sash extrusion. More particularly, the first and second sliders (111, 112) are configured to be mounted in the groove of the Euro Groove sash members. That is to say, in this embodiment the sash members 181 & 182 provide the respective first and second tracks on which the sliders move. As is best seen in Figures 12A to 12D, each euro groove frame member comprises a pair of longitudinal channels 183 which together form a respective track. A corresponding pair of runners are disposed on the body of each slider and configured to be received in the channels 183 of each sash member so as to co-operatively retain each slider whilst allowing for relative sliding motion. In this embodiment, the runners are ribs 138 provided by an extension of the respective thin elongate body as indicated by dotted lines in Figure 11.

[0077] Sliding movement of the linkage 110 is restricted by retainer 140. The retainer 140 includes a stem 141 and guide cap 142. The stem 141 is configured to be received within an elongate, longitudinally extending aperture 143 in the first slider body and fixed to the track by threaded fastener 145 passing through a central bore 144 in the stem 141. Abutment of either end of the elongate aperture 143 against the stem 141 restricts movement of the slider 111 along the track thereby preventing over extension of the linkage 110 and also inadvertent decoupling of the linkage from the widow frame track, particularly as noted, where the linkage is to be installed in an elevated location. The guide cap 142 further retains and guides the first slider 111.

[0078] A pair of complementary stop faces 149 are also provided on each of the first slider 111 body and the rocker member 112 to prevent over rotation of the rocker in use as can be seen in Figure 3A.

[0079] In this embodiment the comer transfer unit and more particularly the second slider 112 also serves as a securing mechanism being equipped with a locking/latching formation 150 in the form of a lock pin 150 (locking member).

[0080] The lock pin 150 is intended to engage a striker (not shown) attached to the supporting frame work of the pivotally mounted window panel. In operation, the pin 150 is moved between a position engaging the striker to secure or lock the window in a predetermined position (typically in a closed position), and a position at which the striker is released so that the window panel can be moved. The pin 150 includes a locking roller 151 mounted on a rivet 152 and attached to the second slider by means of aperture 153. In operation, the pin 150 moves along with longitudinal movement of the second slider and may selectively be used to engage a corresponding striker on the window supporting frame.

[0081] As noted, the corner transfer linkage may be a component part of a window panel securing system. Such a system is exemplified in Figure 13 where in a portion of a window panel 188 is illustrated. The panel comprises a glass panel portion 189 and a peripheral “Euro Groove” frame including a first and second sash members 181 and 182. The comer transfer linkage 110 described above and shown in Figure 9 to 12D forms a component of a panel securing system 160. As best seen in partial exploded and exploded views shown in Figures 14 and 15 respectively, the window panel securing system 160 comprises an actuator mechanism

161 having a pivotally mounted actuator handle 162 and a latching/locking mechanism 163 having a lock pin 164. A first connecting rod 165 connects the actuator mechanism 161 to the comer transfer linkage 110, and a second connecting rod 166 connects the corner transfer linkage 110 to the latching/locking mechanism 163. Connection between the various components and connecting rods is provided in this embodiment by complementary pin and aperture pairs.

[0082] Turning handle 162 to operate the system rotates a cam having a tongue 167 to engage a laterally move sliding transfer block 168 connected to first connecting rod 165, causing the connecting rod to move longitudinally as indicated by arrow Ml . This motion is transferred to comer transfer linkage 110 and passed to sliding latching/locking mechanism 163 via connecting rod 166 as indicated by arrow M2. Lock pin 150 on the corner transfer linkage and lock pin 134 on the latching/locking mechanism 163 may therefore be moved together by rotation of handle

162 to engage a respective striker (not shown) attached to the supporting frame work of the pivotally mounted window panel to selectively engage or release the window panel securing system.

[0083] It will be noted that the above portion of the window panel is provided with two potential points of securement, one each by lock pins 150 and 164. It will further be appreciated that additional points of securement may be added to the window panel on the potion of the panel not shown and connected to the same actuator mechanism 161 and pivotally mounted actuator handle 162 allowing for single point operation. Furthermore, securement points may be mounted along any peripheral edge of a moveable panel by appropriate use of corner transfer linkages, connecting rods and latching/locking mechanisms. [0084] As noted above, the corner transfer linkages 10 and 110 as described above are intended to be mounted in the grooves of a Euro Groove frame assembly having integral channels forming a track for each slider. However, the invention may be used with other types of frames formed of sash members having different configurations of tracks and rails. For instance, the rail may be configured as a longitudinally extending rib on the sash member mating with a corresponding groove on the slider. As such various shapes and configurations of complementary rails and runners may be used. Alternatively, if the sash members do not include a suitable groove or rail formation rail along which the sliders may run, a suitable rail may be attached to the sash member as required.

[0085] Figures 16 to 21 show another comer transfer linkage in accordance with the invention. Comer transfer linkage 210 comprises first and second sliders (211 & 212 respectively) each to be mounted to a respective track for slidable movement along a respective first and second axes (A201 and A202 respectively) said first and second axes being set at an internal corner angle to one another. Each slider is connected by means of a respective proximal pivot joint (217 and 218 respectively) to a substantially rigid, interconnecting rocker member 213 to pivot about a respective pivot axis (P201 and P202). Each slider further includes a respective connecting formation 235 disposed distal to the respective pivot joint for connection of the linkage 210 to an actuator mechanism and/or a latch mechanism, typically by means of transmission rods.

[0086] It will be appreciated that the corner transfer linkage 210, by virtue of the pivotally connected rocker member 213, passes linear movement between the first and second sliders along the respective first and second tracks. However, due to the geometry of the tracks and linkage, the instantaneous displacement ratio of the first and second sliders is non-uniform. For instance, for first and second tracks set at orthogonally as shown in the figures, the instantaneous displacement ratio of the first to second sliders is given by tan a where a is the included angle between a track and a line connecting the pivot axes P201 and P202. Thus movement by a set displacement of one slider may not result in an equal displacement of the second slider. In this regard, in one embodiment the invention provides adjustable displacement between the connecting formation 235 and the pivoting joint on at least one slider that may be used to optimize the geometry of the comer transfer linkage 210. Whilst typically, the corner transfer linkage 210 will be optimized to provide an even 1 : 1 displacement ratio so that movement of the first (input) slider causes an equal movement of the second (output) slider, in some circumstances it may be desirable to provide an uneven ratio. [0087] Turning to Figures 16 to 21, at least one of the sliders (211 & 212) provides for lengthwise adjustment of the displacement between its respective proximal pivot joint and connecting formation 235. By way of example, in the embodiment of the invention displayed, the first slider 211, includes a proximal body 214a and a distal body 214b each configured for longitudinal slidable motion along first axis A201 defined by the first linear track. The proximal body 214a is pivotally connected to the rocker member 213 at its proximal end while the distal body 214b includes the connecting formation 235 disposed at a distal end. In other embodiments, the first or both sliders may provide for lengthwise adjustment of the displacement between its respective proximal pivot joint and connecting formation 235.

[0088] In this embodiment, adjustable separation of the proximal and distal bodies (214a &

214b) is provided by a threaded connector 250, extending between the proximal and distal bodies (214a & 214b) and configured such that rotation of the threaded connector 250 increases or reduces the separation between them.

[0089] As can be seen in the figures, the threaded connector 250 includes an elongate threaded shank 251 and stop surfaces in the form of an enlarged head portion 252 disposed on one end of the shank. The head portion 252 is to be received in a dock 253 disposed within the proximal body 214a while threaded shank 251 engages with a corresponding threaded aperture 254 associated with the distal body 214b. The dock 253 captures the head 252 and includes stop formations 255 and 256 which prevent longitudinal movement therebetween whilst allowing for rotation of the connector 250. Rotation of the connector 250 causes the threaded shank 251 to travel longitudinally through threaded aperture 254 to allow for adjustment of the separation between the proximal and distal bodies (214a & 214b). In this embodiment, the distal body 214b includes a nut insert 257 captured within a receiving slot in the body, the nut supporting the threaded aperture 254. Furthermore, this threaded aperture 254 in the nut insert 257 is aligned with a passage in the distal body 214b allowing insertion of the shank 251 therethrough to engage the threaded nut 257. The passage is sized to engage the threads of the threaded shank 251 thereby acting as a loc nut, or nyloc insert. An access port 253a (best seen in Figure 20) provides an opening to the dock 253 allowing for the head to be inserted or extracted from the dock in a transverse direction to thereby connect or disconnect the proximal and distal bodies (214a & 214b). This allows the proximal and distal bodies (214a & 214b) to be disconnected during installation, repair, maintenance or replacement of the linkage, while the distal body is retained on the on the respective track. [0090] The head portion 252 is provided with a tool engaging formation 258 for receiving a rotation tool 300 for rotation of the threaded connector 250. A tool access opening 260 in the proximal body 214a provides access to the head 251 of the threaded connector allowing for engagement of the tool 300 with the tool engaging formation 258. In this embodiment the tool engaging formation is a hexagonal recess engagable with a compatible Allen key (hex spanner). Preferably the tool engaging formation and tool 300 allow for off-axis operation, for instance, as shown in Figure 20 wherein the Allen key is a ball end Allen key. Upon convenient engagement of the tool 259 with the threaded connector 250 and rotation thereof, the threaded connector 250 maybe wound to extend from or retract into the distal body 214b thereby to reduce or increase separation between the proximal body 214a and a distal body 214b.

[0091] As with the embodiments previously described and shown in figures 1 - 15, the corner linkage 210 shown in Figures 16 - 21 is intended to be used with a “Euro Groove” or “C groove” window sash extrusion. More particularly, the first and second sliders (211, 212) and the proximal and distal bodies (214a & 214b) are configured to be mounted in the groove of the Euro Groove sash members 281 & 282 of widow panel 289 which provide the respective first and second tracks on which the sliders move. As is best seen in Figures 17 - 19, each euro groove frame member comprises a pair of longitudinal channels 283 which together form a respective track. A corresponding pair of runners are disposed on the body of each slider and configured to be received in the channels 283 of each sash member so as to co-operatively retain each slider whilst allowing for relative sliding motion. The runners are in the form of a pair of parallel longitudinally orientated elongate ribs 238 projecting from opposite sides of the respective slider body.

[0092] Sliding movement of the linkage 210 is restricted by retainer 240 acting on one of the sliders. In this embodiment the retainer is associated with the second slider 212. The retainer

240 comprises a threaded fastener 241 having a head 242 configured to be received within an elongate, longitudinally extending channel 243 in the second slider body. The threaded fastener

241 is to be fixed to the track such that abutment of the head with stops disposed at either end of the channel restricts movement of the second slider 213 along the track thereby preventing over extension of the linkage 210. An opening 245 intersects the channel allowing access to the channel and the threaded fastener 241 to be fixed into the track. [0093] Once the second slider is inserted into the second track, the stem 41 of the retainer 40 may then be inserted through elongate aperture 43 in the second slider and fixed by threaded fastener 45 into a pre-drilled aperture 47 in the second sash member 82. This step may be performed either prior to, or following, insertion of the first slider into the first track. With the retainer 40 fixed to the second sash member 82, the second slider 12 is retained in the vertical second track. In installations where the second sash member 82 is vertically orientated as shown in Figure 8A, it will be appreciated that the retainer prevents the second member sliding out of the second track at the lower open corner 80 under the weight of the linkage if the first slider is not retained in the first track. Thus, the retainer 40 reduces the likelihood of components being dropped during installation, repair, maintenance or replacement of the linkage, which is an important safety consideration where the linkage is to be installed in an outward opening panel in an elevated location.

[0094] Components of the linkage may be fashioned from any appropriate engineering material including metals, plastics, composites or the like. In the embodiments shown in Figures 1 to 8D, and 16 to 19, the slider bodies are formed of a plastics material which allows for injection molding of parts and moreover reduces or eliminates metal-to-metal contact of the slider and rails of the sash members 81 and 82 which are typically formed of metal, such as aluminum or steel. One disadvantage of metal to metal contact is that corrosion of metal components, which may be enhanced by galvanic corrosion, may inhibit smooth operation of the linkage. For instance, corrosion of the track and/or sliders may inhibit smooth sliding movement of the slider along the respective track resulting in compromised linkage performance including binding, sticking or freezing. On the other hand, in the embodiments shown in Figures 9, 10A - 10D, 11, and 12A - 12D the slider bodies are made from metal as previously noted.

[0095] It will be appreciated that the invention is particularly adapted for transferring actuation inputs between transverse frame members of a window panel frame. For instance, where a latch assembly includes an actuator mechanism located on a first frame member and a latch mechanism located on a transverse frame member. One such latch assembly is shown in the applicant’s prior Australian Patent Application AU 2016204675 and may be particularly used for multi-point latching systems having a single actuator mechanism and multiple latching mechanism. [0096] In this regard the invention is not limited to a linkage system, but also includes a window latching system incorporating a linkage assembly as described above, in particular a linkage assembly having multiple latches connected to a single actuator.

[0097] The invention has been described above as a linkage for use with an awning type pivot window, it will be appreciated that it is not limited to this field of use and may equally be applied to other pivoting style windows such as casement style windows, or any other moveable window or other panel configured to move out of alignment with the plane of the window /door frame. It will be appreciated that the invention provides a corner transfer linkage which may reduce frictional losses of transferring actuator movement around the perimeter of a panel particularly at comer transitions. The invention may also prove a less complex comer transfer linkage which is more reliable and cheaper to manufacture than existing linkages or provide a useful alternative.

Claims

1. A corner transfer linkage for a panel, the corner transfer linkage comprising: a first slider to be slidably mounted on a first track for movement along said first track; a second slider to be slidably mounted on a second track for movement along said second track, with said first track inclined to the second track by an internal comer angle; a substantially inflexible interconnecting rocker member pivotally connected to each slider at respective first and second pivot joints to pivot about respective first and second pivot axes, so as to extend between the sliders; wherein slidable movement of said first slider along said first track causes slidable movement of the second slider along said second track.

2. The comer transfer linkage of claim 1 wherein the first track is associated with a first peripheral edge of the panel and the second track is associated with a second peripheral edge of the panel, said second peripheral edge be adjacent to the first peripheral edge.

3. The comer transfer linkage of claim 1 or 2 wherein opposing ends of the rocker member are pivotally connected to respective proximal ends of each slider.

4. The comer transfer linkage of any one of the preceding claims wherein the first slider includes a first connecting formation for facilitating connection of the first slider to an actuator mechanism and/or a latch mechanism.

5. The comer transfer linkage of claim 4 wherein the first connecting formation and the first pivot joint are spaced apart by a distance and wherein the distance is adjustable.

6. The comer transfer linkage of claim 5 wherein the first slider comprises a proximal body supporting said first pivot joint and distal body supporting said first connecting formation, each of the proximal and distal bodies to be slidably mounted on the first track for movement along said first track and wherein said proximal body is connected to said distal body by an adjustable connector for adjusting separation of the bodies and thereby the distance between first connecting formation and the first pivot joint.

7. The comer transfer linkage of any one of the preceding claims wherein the internal comer angle is 90 degrees.

8. The comer transfer linkage of any one of the preceding claims wherein each pivot axis is orthogonal to the first and second tracks.

9. The comer transfer linkage of any one of the preceding claims wherein the first slider includes an elongate body.

10. The comer transfer linkage of any one of the preceding claims wherein the second slider includes an elongate body.

11. The comer transfer linkage of any one of the preceding claims wherein the first and second tracks are associated with respective first and second sash members of a door or window panel frame.

12. The corner transfer linkage of claim 1 wherein the sash members include an euro groove or a C groove.

13. The comer transfer linkage of any one of the preceding claims wherein the panel is a door or window panel.

14. The comer transfer linkage of any one of the preceding claims wherein the interconnecting rocker member is substantially rigid.

15. A securing system for a panel, the panel movable between a first and second positions with respect to a supporting structure, the securing system comprising: an actuator mechanism disposed on a peripheral portion of the panel and having an actuator for operating the securing system; a securing mechanism disposed on a second peripheral portion of the panel, said securing mechanism having a securing member for engaging a complementary receiver on supporting structure to retain the panel in a predetermined position; a corner transfer linkage including: a first slider to be slidably mounted on a first track for movement along said first track; a second slider slidably mounted on a second track for movement along said second track, with said first track inclined to the second track by an internal corner angle; a substantially inflexible interconnecting rocker member pivotally connected to each slider at respective first and second pivot joints to pivot about respective first and second pivot axes, so as to extend between the sliders; wherein slidable movement of said first slider along said first track causes slidable movement of the second slider along said second track; a first connecting member connecting the actuator mechanism to the first slider; and a second connecting member connection the second slider to the securing mechanism.

16. The securing system for a panel of claim 15 wherein the securing system includes a locking or latching member such as a catch or a locking bolt or lock pin.

17. The securing system for a panel of claim 15 or 16 wherein the panel is a door or window panel.

18. The securing system of any one of claims 15 to 17 wherein the interconnecting rocker member is substantially rigid.

19. A window or door panel including a comer transfer linkage, the comer transfer linkage comprising: a first slider to be slidably mounted on a first track for movement along said first track associated with a first peripheral edge of the panel; a second slider to be slidably mounted on a second track for movement along said second track associated with a second peripheral edge of the panel, with said first track inclined to the second track by an internal corner angle; a substantially inflexible interconnecting rocker member pivotally connected to each slider at respective first and second pivot joints to pivot about respective first and second pivot axes, so as to extend between the sliders; wherein slidable movement of said first slider along said first track causes slidable movement of the second slider along said second track.

20. A corner transfer linkage for a panel, the corner transfer linkage comprising: a first slider to be slidably mounted on a first track for movement along said first track; a second slider to be slidably mounted on a second track for movement along said second track, with said first track inclined to the second track by an internal comer angle; a substantially inflexible interconnecting rocker member having a first and second spaced end portions connected to each slider at respective end portions thereof so as to extend between the sliders; wherein an end portion of the rocker member is rotatable with respect to the first or second slider; and wherein slidable movement of said first slider along said first track causes slidable movement of the second slider along said second track.

21. A corner transfer linkage for a panel according to claim 20 wherein, respective end portions of the first and second sliders are rotatable with respect to the rocker.

22. A corner transfer linkage for a panel according to claim 20 or 21 wherein a flexible member joining an end of one or both of the first and second sliders to a respective end or ends of the rocker member.