GB2067638A

GB2067638A - Window casement

Info

Publication number: GB2067638A
Application number: GB8037700A
Authority: GB
Original assignee: Aug Winkhaus GmbH and Co KG
Current assignee: Aug Winkhaus GmbH and Co KG
Priority date: 1980-01-15
Filing date: 1980-11-25
Publication date: 1981-07-30
Also published as: ATA531380A; GB2067638B; DE3001260A1; AT371541B; FR2476199A1; DE3001260C2; SE8008486L; SE429461B; YU299280A

Abstract

A window which can pivot about a vertical or horizontal axis, comprises frame members (190) and (151) (Fig. 3-not shown); a track (16) which is attached to frame member (190) and provided with a retaining device (202); a tilt-limiting scissor-element (12) connected to the track (16); an actuating rod having a first section (44) which is guided on the inner side of the track (16) and carries a cam (21) for locking the element (12) in a ready-to-pivot position, said first section of actuating-rod having an elongated slot (204) for the through- engagement of the retaining device and being coupled at 54 to a second section (56), said second section (56) being coupled via a corner member (62) to an exposed third section (24) located in an outer channel-space (178) of the frame member 190, the section (24) being provided with guide devices (188) so that it extends into the inner channel-space (174) of frame member 151 (Fig. 3-not shown). <IMAGE>

Description

SPECIFICATION Window casement The invention relates to window casements for windows which can either pivot about a vertical axis or tilt about a horizontal axis.

A window casement which comprises frame members formed from metal or, in particular, from plastics sections and possessing an open actuating-rod channel on their rebate side, guide rails for actuating-rods projecting from the side walls of the channel, half way up the channel, into the channel, and forming inner channel-space between the bottom of the channel and the underside of the guide rails, and a central channelspace between the mutually facing side surfaces of the guide rails and an open outer channel-space on the side of the guide rails remote from the channel bottom, is known for example from a brochure "Helmitin Kunststoffenster (Helmitin plastic windows)".

The invention seeks to match, in the best manner, an actuating-rod fitting for a window casement of this type to the factors defining the profile shape, with the intention of minimising the number of the separate parts of the actuating-rod fittings, of simplifying, as much as possible, the assembly of the actuating-rod fittings into the window casement, of likewise minimising the machining procedures on the window casement, required for attaching the actuating-rod fittings, or rendering the appearance of the installed actuating-rod fittings harmonious, despite the smallest possible number and smallest possible size of covering parts, of enabling the actuatingrod fittings to be adapted, in a simple manner, to different window casement formats, and of ensuring that the mobile actuating-rod components move easily and freely as a result of guiding these components in an advantageous manner with regard to friction. It is further intended that care should be taken to ensure that the actuating-rod fittings, starting from a group of basic fittings which are always present, can easily be supplemented in the case of high and/or wide window casements, which require additional locking measures on the frame, the components comprising the group of basic fittings being designed in such a way that, in the absence of the supplementary components, the connections for these supplementary components, present on the group of basic fittings, do not manifest themselves in a troublesome manner, either visually or functionally.Finally, it is still further intended that care should be taken to ensure that the attachment of the components comprising the actuating-rod fittings, to the casement frame, is effected with the best possible exploitation of accumulations of material within the profile, thus guaranteeing optimum retention of these components. This requirement arises particularly when the profile height of the profiles, measured always in the plane of the window casement, is limited, in accordance with the trends in modern window construction.

According to the present invention there is provided a window casement for windows which can either pivot about a vertical axis or tilt about a horizontal axis, comprising a plurality of frame members each of which has an open actuatingrod channel on a rebate side; guide rails for actuating-rods projecting from side walls of each channel, midway of the channel, into the open channel cross-section, and forming an inner channel-space between the bottom of the channel and the underside of the guide rails; a central channel-space between the mutually facing side surfaces of the guide rails and an open outer channel-space on the side of the guide rails remote from the bottom of the channel; a bent track attached to an upper frame member in the region of a pivot-axis corner in the outer channelspace, the bent track being provided with a retaining device, which extends into the inner channel-space and engages beneath the undersides of the guide rails; a tilt-limiting scissorelement connected, on the casement side, to the bent track; and an upper, concealed first section of actuating-rod being guided on the inner side of the bent track, in the central channel-space and/or inside the inner channel-space, said first section of actuating-rod carrying a locking cam for locking the tilt-limiting scissor-element in a ready-to-pivot position, the locking cam engaging through an elongated slot in the bent track, said first section of actuating-rod having an elongated slot for the through-engagement of the retaining device, the end of the upper said first section of actuating-rod, on the operating side, being coupled to an upper exposed second section of actuating-rod, located in the outer channel-space, said second section of actuating-rod extending into the inner channelspace by means of guide devices which engage slidably beneath the underside of the guide rails, the end of the second section of actuating-rod, on the operating side, being coupled via a first upper corner-turning member to an exposed third section of actuating-rod, on the operating side, located in the outer channel-space, the third section of actuating-rod, on the operating side, being provided with guide devices so that it extends into the inner channel-space and engages slidably beneath the underside of the guide rails.

In the case of a relatively large casement height, it may prove expedient or necessary to make provision, even on the pivot-axis side of the casement, for additional locking devices at the mid-height position. This said first section of actuating-rod may be connected via a second upper corner-turning member, on the pivot-axis side, to an exposed fourth section of actuatingrod, on the pivot-axis side, located in the outer channel-space, said fourth section of actuatingrod, on the pivot-axis side, being provided with guide devices and extending into the inner channel-space to engage slidably beneath the underside of the guide rails.

In the case of very wide casements, it may prove necessary to make provision for additional locking devices in the region of the lower casement frame piece, between the operating side and the pivot-axis side of the casement. Thus a lower, exposed fifth section of actuating-rod may be connected via a lower corner-turning member, on the operating side, to the third section of actuating-rod on the operating side, said fifth section of actuating-rod being provided with guide devices and extending into the inner channelspace to engage slidably beneath the underside of the guide rails.

In the case where the profiles of the frame members have a very small design height, particularly plastics frame members, difficulties can arise with regard to fastening the bent track in the outer channel-space which receives this track and if it is desired to secure this track against displacement, the track being secured in any case against lifting-off by means of the T-shaped retaining members, by simply screwing a screw in through the base of the channel; it can happen that this screw does not then encounter sufficient material in the profile for holding securely, and it can also happen that the screw strikes against the window pane. To remedy this problem, the bent track may be secured against displacement by means of a fastening element which penetrates into the upper frame member outside the longitudinal centre-line of the bent track.In this connection, it should be pointed out that the special profile design, represented in particular in Figure 4 of the drawings in association with the positioning of the fastening screw, as shown in Figure 4, is of significance. In particular, it is preferable that a fastening tab, which bears on the outer surface of the bent track, also bears on the upper frame member outside the bent track and, at that point, has a hole, which receives a fastening screw, penetrating into the upper frame member The bent track may be part of an angle-bend which extends over an upper part of one frame member on the pivot-axis side, and inside the outer channel-space of this member, and, if appropriate, covering the upper corner-turning member on the pivot-axis side.Should such a corner-turning member not be available, the upper bent track can however be designed as an anglebend, since the actuating-rod channel is in any case certainly present in the frame member on the pivot-axis side and can thus receive the vertical leg of the angle-bend. In any case, the security is improved by the presence of the angle-bend, and positioning for correct functioning is rendered easier.

In order to be able to make provision, or not, according to choice, for the exposed actuating-rod on the pivot-axis side, without relatively extensive conversion procedures, it is advisable to attach the upper corner-turning member on the pivot-axis side detachably to the inner side of the angle-bend, since this corner-turning member is required only when provision is made for an exposed actuatingrod on the pivot-axis side. If no provision is made for such an actuating-rod, the associated upper corner-turning member on the pivot-axis side would be superfluous, would give rise to unnecessary expense and would be inconvenient.

The first upper corner-turning member on the operating side may include a corner-turning member housing, which has grooves in one side wall, for receiving a respective guide rail of the abutting frame member, a filler member being fastenable to the opposite side wall of the cornerturning member housing said filler member assuring the engagement of the guide rails and of the grooves by bearing on the respective side wall of the channel.

According to a preferred embodiment of the invention, for the purpose of coupling on to the second section of actuating-rod, the coupling end of the first, section of actuating-rod and/or for the purpose of coupling on to the fourth section of actuating-rod on the pivot-axis side, the coupling end of the second upper corner-turning member on the pivot-axis side, and/or for the purpose of coupling on to the second section of actuatingrod, the coupling end of the upper corner-turning member on the operating side, and/or for the purpose of coupling on to the third section of actuating-rod on the operating side, the coupling end of the first upper corner-turning member on the operating side, and/or for the purpose of coupling on the fifth section of actuating-rod, the coupling end of a lower corner-turning member on the operating side are cranked in such a manner that they bear against the outer surfaces of the respective exposed sections of actuating-rod. This type of coupling is advantageous with regard to simple assembly and disassembly of the actuating-rod fittings on the casement frame. The respective coupling-end can have a coupling peg which engages into a hole in the respective section of actuating-rod. The advantage of this configuration resides in the fact that provision then merely has to be made for holes, as coupling members, in the sections of actuating-rod. These holes can even be made relatively easily on the premises of the manufacture of the fittings, that is to say, on the premises of the particular company which installs the fittings in the window casements.In this way, adaptation of the fittings to different window casement formats is possible on the premises of the manufacturer. The manufacturer merely needs to trim the exposed sections of actuating-rod to the correct length in each case, and then to drill the holes necessary in each case. It is even conceivable, to make the coupling holes in a relatively large number, ready for use, so that, in this way, adaptation is possible without drilling new holes.

In many cases, a modified configuration will be necessary at the point of connection between the lower end of the section of actuating-rod on the operating side and the vertical leg of the lower corner-turning member on the operating side, and particularly in order to be able to attach, at this point on the vertical actuating-rod, a tilt-locking element at as low a position as possible.Thus the third section of actuating-rod on the operating side may overlap with its lower end, a vertical leg of the lower corner-turning member on the operating side, this vertical leg being accommodated in the central channel-space and/or in the inner channel-space, a coupling peg, projecting from the vertical leg of the lower corner-turning member on the operating side, engaging detachably into a hole on the lower end of the exposed section of actuating-rod on the operating side, a tilt-locking element being attached to the lower end of the third section of actuating-rod on the operating side, and to the outer surface of the actuating-rod.In this design, the detachable connection between the lower end of the third section of actuating-rod on the operating side and the vertical leg of the lower corner-turning member on the operating side is intended to allow the corner-turning member to be omitted, if the lower, exposed section of actuating-rod is not required.

In this design, the lower end of the third section of actuating-rod on the operating side assumes the function of securing the vertical leg of the lower corner-turning member on the operating side against lifting out of the actuating-rod channel of the frame piece on the operating side.

In order to assure functionally correct engagement between the vertical leg of the lower cornerturning member on the operating side and the lower end of the exposed section of actuating-rod on the operating side, the cross-sectional measurements of the vertical leg of this cornerturning member can be chosen such that the leg is located exactly in correct engagement with the exposed section of actuating-rod on the operating side, when bearing on the bottom of the channel.

By this means, however, the problem is still not solved of how the horizontal leg of the lower corner-turning member on the operating side should be secured against lifting out of the actuating-rod channel of the lower frame member To solve this problem, it is proposed that a portion of retaining track, which can be detached from the lower corner-turning member on the operating side, may be located in the outer channel-space in the region of the tilt-axis corner of the lower frame member, and retains the lower corner-turning member on the operating side, with its horizontal leg in the central channel-space and/or in the inner channel-space, a retaining device being provided on said portion of retaining track, said retaining member extending into the inner channel-space and engaging beneath the underside of the guide rails, said portion of retaining track being secured against longitudinal displacement and having, at one of its ends, means acting as a tilt-bearing.

Here also, the detachable connection between the portion of retaining track and lower corner turning member on the operating side has been chosen with particular regard to the fact that, depending on the width of the window casement, the lower corner-turning member on the operating side may or may not be present, whilst the portion of retaining track is necessary in every case when it is manufactured integrally with the tilt-bearing.

Preferably at least one of the retaining members engages, tunnel-like, over a part of the horizontal leg of the lower corner-turning member on the operating side.

The fixing of the portion of retaining track in its longitudinal direction can be rendered possible, in a simple manner, by arranging that at least one of the retaining members can be brought, by means of clamping devices, up against said portion of retaining track, whilst nipping the guide rails.

Preferably the bent track and/or the portion of retaining track and/or the exposed sections of actuating-rod have a rectangular profile which is matched to the cross-section of the outer channelspace. The above sections can accordingly be made from commercially available strip material.

The window casement can be very simply assembled and disassembled, in that the bent track, the exposed sections of actuating-rod and, as appropriate, the portion of retaining track are pushed into the channels in the longitudinal direction of the latter. A precondition for this insertion, however, is that, in at least some of the casement corners, the guide rails are reduced in size, in such a manner that the exposed sections of actuating-rod, and/or the bent track, and/or the portion of retaining track can be pushed into the channel without cbstruction by the guide rails of the respective frame member.

In the simplest case, the retaining members can be mushroom-shaped. The same applies also the guide members, and is particularly advantageous in the case of these members on account of the good sliding properties. The mushroom shaped retaining members are available as inexpensive commercial parts.

The invention is illustrated, merely by way of example, in the accompanying drawings, in which: Figure 1 represents, in exploded view, a group of actuating-rod fittings of a window casement according to the present invention; Figure 2 represents an enlargement of an upper left hand part of the actuating-rod fittings of Figure 1; Figure 3 is a section taken on the line Ill-Ill of Figure 1; Figure 3a shows a part of Figure 3 on an enlarged scale; Figure 4 is a section taken on the line IV--IV of Figure 1; and Figure 5 is a section taken on the line V-V of Figure 1.

A window casement according to the present invention is illustrated in the drawings but for the sake of clarity, frame members or pieces are omitted in Figure 1. The profile of the vertical frame piece on the pivot-axis side is, however, shown in Figure 3, and, additionally, the profile of the upper horizontal frame piece is shown in Figures 4 and 5, and it is accordingly to be assumed that the profiles of frame piece on the operating side and of the lower frame piece are of exactly the same design as the profiles according to Figures 3 to 5.

In Figure 1 , the pivot-axis of the window casement is schematically indicated by A-A and the tilt-axis is schematically indicated by B-B. In addition, an operating handle is indicated by reference numeral 10. The terms "upper", "lower", "operating side" and "pivot-axis side", employed in the following description and in the claims, relate to Figure 1.

The window frame associated with the window casement is not illustrated. it is, however, clear that the window casement is permanently connected to the static window frame, in the region of a corner-bearing drawn in on Figure 1, and that the window casement can, according to choice, be pivoted about the pivot-axis A-A or be tilted about the tilt-axis B-B. The actuating-rod fittings, represented in Figure 1, serve to switch the window casement from the ready-to-tiit position to the ready-to-pivot position, and to lock the window casement to the window frame, in its closed position relative to the window frame.

It has already been stated that the window casement is permanently connected, at the corner-bearing, to the window frame, the cornerbearing being associated both with the pivot-axis A-A and with the tilt-axis B-B, thus allowing both pivoting and tilting. In order to restrict the window casement in its tilting about the tilt-axis B-B, a tilt-limiting scissor-element 12 is provided, this element being pivotably and displaceably connected, at 14, via one of its ends, to the upper window casement. and, in particular, to a track 16, which is attached to the rebate side of the upper window casement frame piece.A main arm 18 of the tilt-limiting scissor-element 12, which is displaceably and pivotably coupled to the window casement at 14, is coupled, in a manner allowing pivoting about the pivot-axis A-A, to the fixed window frame in the region of the pivot-axis A-A, by means of a linkage-lug 20.

In Figure 1 ,the tilt-limiting scissor-element 12 is drawn in that position which it assumes, when the window casement is tilted, when the window casement is fully inclined. In the ready-to-pivot position, the tilt-limiting arm 1 8 is parallel to the upper frame piece and thereby parallel to the track 16, and is locked in this position.For this purpose, a locking cam 21 is displaceably guided along the track 16, this locking cam engaging with a locking stop 22 in the ready-to-pivot position, that is to say when the tilt-limiting arm 1 8 is positioned parallel to the track 16, so that the tilt-limiting arm is locked in the parallel position to the track 1 6 and the linkage-lug 20 can assume the function of the pivotable mounting of the window casement, at its upper end, about the pivot-axis A-A.

When ready to tilt, the tilt-limiting arm 1 8 is released from its lock to the bent track 16, so that the tilt-limiting arm 18 can move into the position shown in Figure 1. On the other hand, a tiltbearing must be formed, in the ready-to tilt position, in the region of the lower corner on the operating side, this tilt-bearing defining, in conjunction with the corner-bearing, the tilt-axis B-B. To form the tilt-bearing, a tilt-locking element 26 is located on a vertical section 24 of an actuating-rod on the operating side, this element moving into coincidence with a seating on the static window frame, when the window casement is set to the ready-to-tilt position, the tilt-locking element, in conjunction with the seating on the window frame side, then forming the tilt-bearing.

A locking cam 28 is attached to the section 24 of actuating-rod on the operating side, this cam engaging, in the closed position of the window casement relative to the window frame, into a locking plate on the window frame, so that the window casement neither tilts about the tilt-axis B-B nor can it be pivoted about the pivot-axis A-A.

The actuating-rod fittings, represented in Figure 1, serve the following purposes.

1. To release, in the ready-to-tilt position, a locking cam 21 from engagement with a locking stop 22, to release the locking cam 28 from engagement with the locking plate on the window frame, and to bring the tilt-locking element 26 into engagement with its seat on the window frame.

2. To hold the locking cam 28 out of engagement with the locking plate on the window frame and to release the tilt-locking element 26 from its seat on the window frame, in order to bring the locking cam 21, in the ready-to-pivot position, into engagement with the locking-stop 22 and thereby to hold the tilt-limiting arm 18 securely to the track 16, and 3. To bring the locking cam 28, when the window casement is located in the closed position relative to the window frame, into locking engagement with the locking plate on the window frame, the locking cam 21 being able to remain, in this locking position, in engagement with the locking stop 22 and the tilt-locking element 26 can also make an additional contribution to the locking of the closed window casement to the window frame.

An angle-bend 30 is attached to the upper corner of the window casement on the pivot-axis side, the horizontal part of this angle-bend, bearing on the upper frame piece, being formed by the track 16. A vertical leg 32 of the angle-bend 30 bears on the vertical frame piece of the window casement on the pivot-axis side (see also Figure 2). As can be seen from Figure 1, a bridge element 34 is attached to the track 16, this bridge element possessing an elongated slot 36. A pivot/slide peg, attached to the free end of the tiltlimiting arm 1 8 at 14, engages into this elongated slot 36. In addition, a supplementary arm 38 of the tilt-limiting scissor-element 12 extends from the tilt-limiting arm 18, this supplementary arm being pivotably mounted, at 40, on the tilt-limiting arm 1 8 and, at 42, on the track 1 6.

As can be seen from Figures 1 and 2, an upper, concealed section 44 of actuating-rod is guided on the lower side of the track 1 6. This section 44 of actuating-rod stands in drive-connection with the locking cam 21, through an elongated slot 46 passing through the track 1 6. The connection is made via a hollow rivet 48, which passes through the elongated slot 46 and, on one side, is riveted to the section 44 of actuating-rod and, on the other side, is riveted to a support 50 of the locking element 21. A securing part 52 of the support 50 having the shape of a hammer-head extends through the elongated slot 46 and additionally serves to guide the support 50 on the track 16, inside the elongated slot 46.

In Figure 1, the section 44 of actuating-rod, possesses, at its right-hand end, a coupling-end 54, this end being cranked upwards and being capable of coupling to an upper, exposed, section 56 Qf actuating-rod. For this purpose, a coupling peg 58 is located at the coupling-end 54, this peg being designed to engage into a coupling hole 60 of the section 56 of actuating-rod.

An upper corner-turning piece 62 on the operating side connects to the section 56 of actuating-rod, it being possible for this cornerturning piece to be made, in a conventional manner, from a bent sheet of spring material, as will be described in still more detail in connection with the upper corner-turning piece on the pivotaxis side. This upper corner-turning piece 62 on the operating side possesses a corner-turning piece housing 64. By means of an upwards-cranked coupling-end 66, shown in Figure 1, the cornerturning piece 62 can be coupled on to the righthand end, as shown in Figure 1 of the section 56 of actuating-rod and, for this purpose, the cornerturning piece is made with a coupling peg 68, which is designed to engage into a coupling hole 70 of the section 56 of actuating-rod.

The vertical leg of the upper corner-turning piece on the operating side includes a couplingend 72, which is likewise cranked, this couplingend being designed to bear on the outer surface of the section 24 of actuating-rod on the operating side, and, for this purpose, possesses a coupling per 74 for engaging into a guide hole 76 of the section 24 of actuating-rod on the operating side.

A coupling pocket 78 is attached to the outer surface of the section 24 of actuating-rod on the operating side. A coupling blade 80 engages into this coupling pocket 78. The coupling blade can be moved in the direction of the double arrow 82, and can be moved by the operating handle 10, via a hand-operation drive device 84, by turning the operating handle.

As already previously mentioned, the tiltlocking element 26 is attached to the lower end of the exposed section 24 of actuating-rod on the operating side, and particularly so that it is moved, together with the section 24 of actuating-rod, in the longitudinal direction of the latter.

With regard to the upper corner on the pivotaxis side, it should further be added that the section 44 of actuating-rod carries an additional locking cam 86, this cam engaging through an additional elongated slot 88 of the track 1 6, and being designed to engage with an additional locking stop 90 of the tilt-limiting arm.The function of the locking cam 86 and of the locking stop 90 is essentially identical to the function of the locking cam 21 and of the locking stop 22, that is to say, it is intended to secure the tiltlimiting arm 1 8 in the parallel position on the track 1 6. When the tilt-limiting arm 18 is swung inwards towards the parallel position, the locking cam 86, however, allows the locking stop 90 to be captured earlier than the locking stop 22 can be captured by the locking cam 21 , this action being advantageous for the operation of the actuatingrod fittings and of the window equipped with these fittings.

The part of the actuating-rod fittings so far described represents the group of basic fittings, this group already being functionally capable on their own, and being applied, in particular, when comparatively small window casements are involved.

In the case of relatively large window casements, and accordingly in the case of relatively large windows, it may be desirable to make provision, at a central point of the lower window casement frame, for an additional locking element 91, this element being designed to engage with an additional locking plate on the window frame. In addition, in the case of a relatively high window casement, it may be desirable to make provision, about half-way up the pivot-axis side, for an additional locking element 92, this element being designed to engage into an additional locking plate on the static window frame.

A lower corner-turning piece 94 on the operating side is provided for operating the additional locking element 91. This lower cornerturning piece 94 includes a corner-turning piece housing 96, of c-shaped cross-section, in which a spring steel strip 98 is guided. An elongated slot 100 is provided in the vertical leg of the cornerturning housing 96. A coupling peg 102, attached to the spring strip 98, extends through the elongated slot 100 and can be inserted into a hollow rivet 104. In the region of the horizontal leg of the corner-turning piece housing 96, a connector-piece 106 is attached to the spring strip, passing through an elongated slot of the corner-turning piece housing (elongated slot not illustrated), this connector-piece possessing a coupling-end 108 which is cranked downwards.

The coupling-end 108 possesses a coupling peg 110, which is designed to couple into a coupling hole 112 of a lower, exposed section 114 of actuating-rod. This section 114 of aetuating-rod carries the locking peg 91.

The description now reverts to the upper corner on the pivot-axis side and in particular to the operation of the locking cam 92.

As can be seen, in particular, from Figure 2, an upper corner-turning piece 116 is provided on the pivot-axis side, inside the angle-bend 30. This corner-turning piece 116 includes a c-shaped corner-turning piece housing 11 8, in which a spring strip 120 is guided. A coupling pin 122, attached to the spring strip 120 and extending with its shaft 124 through an elongated slot on the back of the c-shaped corner-turning piece housing 118, can be coupled into the hollow rivet 48.

The other end of the spring strip 12Q is attached to a connector-piece 130, by means of a rivet 126, which passes through an elongated slot 128 in the back of the c-shaped corner-turning piece housing 11 8. As can be seen from Figure 1, the connector-piece 1 30 possesses a cranked coupling-end 132. A coupling peg 134 is fastened to this coupling-end 132, this peg being designed to engage into a coupling hole 136 of an exposed section 138 of actuating-rod on the pivot-axis side. This section 138 of actuating-rod carries the locking cam 92.

When the coupling blade 80, shown in Figure 1, assumes its highest position, the locking cam 21 engages behind the locking stop 22, and the locking cam 86 engages behind the locking stop 90; additionally, the locking cam 28 engages into the locking plate of the window frame, this plate being assigned to this cam, and the locking cam 91 additionally engages into a locking plate of the window frame, this plate being assigned to this cam and, finally, the locking cam 92 also engages into the locking plate on the frame piece of the window frame on the pivot-axis side, this plate being assigned to this cam. In addition, the tiltlocking element 26 can engage into a locking plate on the window frame. The window casement is then locked to the window frame.

When the coupling blade 80 assumes an intermediate level, the locking cams 21,86 remain in engagement with the locking stops 22, 90, respectively so that the tilt-limiting arm 18 remains firmly secured to the track 1 6 and positioned parallel to this track. However, the locking cams 28, 90, 92 are then released from the locking plates on the window frame and the tilt-locking element 26 is also released from engagement with its locking plate. The window casement is then in the ready-to-pivot position.

When finally, the coupling blade 80 assumes its lowest position, as shown in Figure 1 , the locking cams 21, 86 clear the respective locking stops 22, 90. Furthermore, the locking cams 28, 91, 92 are out of engagement with the locking plates on the window frame and the tilt-locking element 26 is engaged with its seating on the window frame, so that, in conjunction with the corner-bearing, it defines the tilt-axis B-B and the window casement can consequently be brought into the tilted position, to the extent permitted by the tiltlimiting scissor-element 12.

As can be seen from Figure 2, the c-shaped corner-turning piece housing 11 8 of the upper corner-turning piece 11 6 on the pivot-axis side is detachably fastened to the angle-bend 30; it can be clipped into the angle-bend 30. For the purpose, a clip-tab 140 is stamped out and bent out from the vertical leg 32 of the angle-bend 30, this clip-tab being able to latch into a clip aperture 142 in the back of the vertical leg of the c-shaped corner-turning piece housing 1 18. At the same time, the edge 144 can latch-in between the section 44 of actuating-rod and a central part 146 of a retaining member 148 which is fastened to the track 1 6 by passing through an elongated slot 1 50 in the section 44 of actuating-rod.

If the locking cam 92 is not required, the section 1 38 of actuating-rod on the pivot-axis side and the corner-turning piece 11 6 can thus simply be omitted, without any other conversion procedures on the actuating-rod fittings being necessary.

In exactly the same way, by virtue of the loose coupling between the lower corner-turning piece 94 on the operating side and the section 24 of actuating-rod on the operating side, the cornerturning piece 94 and the section 114 of actuatingrod can be omitted if the locking cam 90 is not required. The following statements are now concernsd with the accommodation of the actuating-rod fittings so far described in the frame pieces of the window casement.

Attention is first drawn to Figure 3. Figure 3 shows the vertical frame piece 151 of the window casement on the pivot-axis side. This frame piece is formed by a plastics section or profile. A casement overlap 1 52 is seen in the Figure, this overlap being designed to contact the exposed surface of the window frame and possessing a receiving channels 1 54 for a resilient sealing strip.The peripheral rebate-surface of the casement, which is normal to the plane of the window, is indicated by reference numeral 1 56. The side receiving a window pane is indicated by reference numeral 1 58. An actuating-rod channel 1 60 is let into the peripheral rebate-surface 1 56 of the casement, this channel being represented on an enlarged scale in Figure 3a. The actuating-rod channel 160 possesses a base 1 62 and side walls 1 53. Guide rails 1 66 project from the side walls 164, these rails each possessing an underside 168, a side remote from the base 170, and side surfaces 172.

An inner channel-space 174 is formed between the base surface 1 62 and the undersides 1 68 of the guide rails 1 66. A central channel-space 1 76 is defined between the mutually opposite side surfaces 1 72 of the guide rails 1 66. Finally, an outer channel-space 1 78 is formed on the surface 170 of the guide rails 1 66 remote from the base.

As can be seen from Figure 3, the section 138 of actuating-rod on the pivot-axis side is matched in size to the outer channel-space 178, so that the section 138 of actuating-rod can slide there easily and freely. Mushroom-shaped guide members 1 88 are attached to the rear surface of the section 1 38 of actuating-rod, these guide members passing through the central channel-space 176, extending into the inner channel-space 1 74 and engaging behind the undersides 1 68 of the guide rails 166.

The guidance of the section 1 38 of actuatingrod on the pivot-axis side is achieved in this manner An upper frame piece 190 of the window casement possesses the same profile as the vertical frame piece on the pivot-axis side.

It can be seen from Figure 4, that the track 1 6 is guided in the outer channel-space 178, and that the section 44 of actuating-rod is guided on the inner surface of the track 1 6 in the region of the central channel-space 1 76 on the track 16. It can further be seen from Figure 4 that a fastening tab 1 92 is securely welded to the track 1 6. A fastening screw 1 94 passes through this fastening tab 1 92 and passes through an accumulation of material in the profile, that is to say, three successive profile walls 1 96, 1 98 and 200.

Figure 5 also shows a section through the upper frame piece 1 90 of the window casement.

Here again, the track 16 can be seen, which is located, in a manner which does not allow displacement, in the outer channel-space 178, fixed by means of the fastening screw 1 94. It can further be seen that mushroom-shaped retaining members 202 are located on the track 1 6. These retaining members pass through an elongated slot 204 of the section 44 of actuating-rod, which is located in the central channel-space 1 76. The track 16 is secured against lifting out of the actuating-rod channel 1 60 by means of the mushroom-shaped retaining members 202.

The sections 56, 24, 114 of actuating-rod are guided, by means of mushroom-shaped guide members 188, in exactly the same way as the section 138 of actuating-rod, the guidance of which was explained in greater detail by reference to Figure 3.

The corner-turning piece housing 64 of the upper corner-piece 62, on the operating side, is let into the actuating-rod channels 160 of the upper frame piece on the operating side and of the vertical frame piece on the operating side of the window casement, and is fastened there. To fasten the housing, a groove 208 is let into the side wall 206 of the corner-turning piece housing 64, this groove being designed to receive the guide rails 1 66 of the upper frame piece and of the vertical frame piece on the operating side.The corner-turning piece housing 64 is so narrow that it can be sunk into the actuating-rod channel 1 60 between the side surfaces 172 of the guide rails 1 66. The corner-turning piece housing 64 is then moved laterally, that is to say normal to the side surface 206, so that the guide rails 1 66 on one of the sides of the actuating-rod channels 1 60 engage into the grooves 208. Finally, an angleshaped filler piece 210 is inserted between the side surfaces 21 2 of the corner-turning piece housing 64 and the oppositely located side wall 1 64 of the channel, and fastened to the cornerturning piece housing 64 by means of a screw 214, so that the corner-turning piece housing 64 is then fixed in the actuating-rod channel 1 60 in a manner preventing any displacement.The dimensions of the angle-shaped filler piece 210 are chosen so that it always finds room in the outer channel-space 1 78.

The description now refers to the lowest corner, on the operating side.

The dimensions of the vertical leg of the cornerturning piece housing 96, of the lower cornerturning piece 94, on the operating side, are chosen so that, when the leg is bearing on the base 1 62 of the actuating-rod channel 1 60, its back lies in alignment with the side surfaces 1 70 of the guide rails 1 66 remote from the base. If then the section 24 of actuating-rod is guided into the outer channel-space 178, a secure engagement between the coupling peg 102 and the hollow rivet 104 is formed.

The horizontal leg of the corner-turning piece housing 96 of the corner-turning piece 94 is secured in the actuating-rod channel of the lower casement frame piece by means of a retaining track 21 8. The profile of the lower casement frame piece is of identical design to the profiles represented in Figures 3,4 and 5. The retaining track 21 8 is received by the outer channel-space 178. Two fastening elements 220, 222 are fastened to the retaining track 218; both fastening elements 220 and 222 are designed to engage beneath the underside 1 68 of the guide rails 1 66.

In this design, the retaining element 220 is formed in the shape of a tunnel, so that it allows the connector-piece 106 to pass through. The retaining element 222 is formed by a small rectangular plate, which, under the action of a compressible resilient body, bears on the inner surface of the retaining track 218. A clamping screw, passing through the retaining track 218 and the small rectangular plate 224, allows the latter to approach the retaining track 218, with a clamping action, so that the guide rails 1 66 are nipped between the retaining track 21 8 and the small plate. By means of the retaining elements 220, 222, the retaining track 218 is consequently secured both against lifting out of the actuatingrod channel and against longitudinal displacement.The retaining track 21 8 is separate from the corner-turning piece 94, so that the retaining track 21 8 can also be installed when the corner-turning piece 94 is not present.

A raised part 226 is located on the right-hand end, as shown in Figure 1, of the retaining track 218, this raised element encountering an opposing raised element on the window frame when the casement is closed from a pivot-open position.

The guide rails 1 66, represented in Figure 3a are reduced in size in the four corners of the window casement, in order to facilitate the assembly and disassembly of the actuating-rod fittings.

Disassembly of the actuating-rod fittings can be undertaken approximately as follows: The angle-shaped filler piece 210 is first detached from the upper corner-turning piece 62, on the operating side. The corner-turning piece housing 64 is then extracted from the actuatingrod channel 16Q, the coupling pegs 68, 74 coming out of the respective coupling holes 70, 76. The handle 10 is then removed, so that the coupling blade 80 is pulled out of the pocket 78.

The screw 194 is then released. The clamping between the small rectangular plate 222 and the retaining track 21 8 is thus released. The retaining track 218 is now pulled out towards the right, as shown in Figure 1. At this stage, the section 24 of actuating-rod, with the corner-turning piece 94.

can be pulled out downwards. The section 114 of actuating-rod can now be pulled out towards the right. The angle-bend 30 is pulled out upwards, towards the left, in the direction of the track 16, the coupling peg 134 detaching itself from the coupling hole 136. Finally, the section 138 of actuating-rod can be pulled out upwards.

Assembly is completed in reverse sequence.

In place of the mushroom-shaped retaining members 202, 220,224, 148 and/or the guide members 188, retaining devices or guide devices of different configuration may also be provided.

For example, the track 16, the retaining track 218 and/or the sections 56, 24, 114. 138 of actuatingrod may be made with C-shaped, claw-shaped edge profiles, these profiles engaging around the guide rails 1 66.

As can be seen from Figure 1, aligned bores 69, 71 are provided on the cranked coupling-end 66 and on the section 56 of actuating-rod. After inserting the coupling peg 68 into the coupling hole 70, a mushroom-shaped plastic rivet 73 can be inserted into these bores, in the manner of a press-button, this rivet preventing unintended lifting of the cranked coupling-end 66 from the section 56 of the actuating-rod. The same plastic rivet can also be provided at the other connection points, where holes, not marked with reference numbers, are provided in addition to the coupling pegs 74, 110, 134, 58 and the coupling holes 76, 112, 136, 60 respectively.

The actuating-rod fittings described above are particularly suitable for plastics profiles having a small height in the plane of the casement, in the case of which there are difficulties in attaching actuating-rod fittings of conventional type to the base of the actuating-rod channel with screws, because of the danger of these screws entering the region of the bed of the glass panes.

The fastening tab 192, shown in Figures 1 and 4, can also be attached loosely to the track 16.

Attachment in this manner is preferred, because the right-hand/left-hand usability of the actuatingrod fittings, on which a high value is laid, is then unrestricted by the fastening tab. For example, it is conceivable that the fastening tab 192 possesses a pin. which can be inserted into a hole in the track 16, this hole being expediently located in the longitudinal median plane of the track 16. A coupling of the fastening tab 1 92 to the track 1 6 in the form of a bayonet-lock is also conceivable.

Claims

1. Window casement for windows which can either pivot about a vertical axis or tilt about a horizontal axis, comprising a plurality of frame members each of which has an open actuating rod channel on a rebate side; guide rails for actuating-rods projecting from side walls of each channel, midway of the channel, into the open channel cross-section, and forming an inner channel-space between the bottom of the channel and the underside of the guide rails; a central channel-space between the mutually facing side surfaces of the guide rails and an open outer channel-space on the side of the guide rails remote from the bottom of the channel; a bent track attached to an upper frame member in the region of a pivot-axis corner in the outer channelspace, the bent track being provided with a retaining device, which extends into the inner channel-space and engages beneath the undersides of the guide rails; a tilt-limiting scissorelement connected, on the casement side, to the bent track; and an upper, concealed first section of actuating-rod being guided on the innner side of the bent track, in the central channel-space and/or inside the inner channel-space, said first section of actuating-rod carrying a locking cam for locking the tilt-limiting scissor-element in a ready-to-pivot position, the locking cam engaging through an elongated slot in the bent track, said first section' of actuating-rod having an elongated slot for the through-engagement of the retaining device, the end of the upper said first section of actuating-rod, on the operating side, being coupled to an upper, exposed second section of actuating-rod, located in the outer channel-space, said second section of actuating-rod extending into the inner channelspace by means of guide devices which engage slidably beneath the underside of the guide rails, the end of the second section of actuating-rod, on the operating side, being coupled via a first upper corner-turning member to an exposed third section of actuating-rod on the operating side, located in the outer channel-space, the third section of actuating-rod, on the operating side, being provided with guide devices so that it extends into the inner channel-space and engages slidably beneath the underside of the guide rails.

2. Window casement as claimed in claim 1 in which the retaining device comprises at least one retaining member which is T-shaped when viewed in cross-section perpendicular to the axis of the channel.

3. Window casement as claimed in claim 1 or 2 in which each guide device comprises a guide member which is T-shaped in cross-section.

4. Window casement as claimed in any preceding claim in which said first section of actuating-rod is connected via a second upper corner-turning member, on the pivot-axis side, to an exposed fourth section of actuating-rod, on the pivot-axis side, located in the outer channel-space, said fourth section of actuating-rod, on the pivotaxis side, being provided with guide devices and extending into the inner channel-space to engage slidably beneath the underside of the guide rails.

5. Window casement as claimed in any preceding claim in which a lower, exposed fifth section of actuating-rod is connected via a lower corner-turning member, on the operating side, to the third section of actuating-rod on the operating side, said fifth section of actuating-rod being provided with guide devices and extending into the inner channel-space to engage slidably beneath the underside of the guide rails.

6. Window casement as claimed in any preceding claim in which the bent track is secured against displacement by means of a fastening element which penetrates into the upper frame member outside the longitudinal centre-line of the bent track.

7. Window casement as claimed in claim 6 in which a fastening tab, which bears on the outer surface of the bent track, also bears on the upper frame member outside the bent track and, at that point, has a hole, which receives a fastening screw, penetrating into the upper frame member.

8. Window casement as claimed in any preceding claim in which the bent track is part of an angle-bend which extends over an upper part of one frame member on the pivot-axis side, and inside the outer channel-space of this frame member.

9. Window casement as claimed in claim 8 in which the second upper corner-turning member on the pivot-axis side is detachably fastened to the inner surface of the angle-bend.

10. Window casement as claimed in any preceding claim in which the first upper cornerturning member on the operating side includes a corner-turning member housing, which has grooves in one side wall, for receiving a respective guide rail of the abutting frame member, a filler member being fastenable to the opposite side wall of the corner-turning member housing, said filler member assuring the engagement of the guide rails and of the grooves by bearing on the respective side wall of the channel.

11. Window casement as claimed in any preceding claim in which for the purpose of coupling on to the second section of actuatingrod, the coupling end of the first, section of actuating-rod and/or for the purpose of coupling on to the fourth section of actuating-rod on the pivot-axis side, the coupling end of the second upper corner-turning member on the pivot-axis side, and/or for the purpose of coupling on to the second section of actuating-rod, the coupling end of the upper corner-turning member on the operating side, and/or for the purpose of coupling on to the third section of actuating-rod on the operating side, the coupling end of the first upper corner-turning member on the operating side, and/or for the purpose of coupling on to the fifth section of actuating-rod, the coupling end of a lower corner-turning member on the operating side are cranked in such a manner that they bear against the outer surfaces of the respective exposed sections of actuating-rod.

12. Window casement as claimed in claim 11 in which the respective coupling end has a coupling peg which engages into a hole in the respective section of actuating-rod.

13. Window casement as claimed in claim 11 or 1 2 in which the third section of actuating-rod on the operating side overlaps with its lower end, a vertical leg of the lower corner-turning member on the operating side, this vertical leg being accommodated in the central channel-space and/or in the inner channel-space, a coupling peg, projecting from the vertical leg of the lower corner-turning member on the operating side, engaging detachably into a hole on the lower end of the exposed section of actuating-rod on the operating side, a tilt-locking element being attached to the lower end of the third section of actuating-rod on the operating side, and to the outer surface of the actuating-rod.

14. Window casement as claimed in claim 12 in which a portion of retaining track, which can be detached from the lower corner-turning member on the operating side, is located in the outer channel-space in the region of the tilt-axis corner of the lower frame member, and retains the lower corner-turning member on the operating side, with its horizontal leg in the central channel-space and/or in the inner channel-space, a retaining device being provided on said portion of retaining track, said retaining member extending into the inner channel-space and engaging beneath the underside of the guide rails, said portion of retaining track being secured against longitudinal displacement and having, at one of its ends, means acting as a tilt-bearing.

1 5. Window casement as claimed in claim 14 in which at least one of the retaining members engages, tunnel-like, over a part of the horizontal leg of the lower corner-turning member on the operating side.

1 6. Window casement as claimed in claim 14 or 1 5 in which at least one of the retaining members can be brought, by means of clamping devices, up against said portion of retaining track, whilst nipping the guide rails.

1 7. Window casement as claimed in any preceding claim in which the bent track and/or the portion of retaining track and/or the exposed sections of actuating-rod have a rectangular profile which is matched to the cross-section of the outer channel-space.

1 8. Window casement as claimed in any preceding claim in which in at least some of the casement corners, the guide rails are reduced in size, in such a manner that the exposed sections of actuating-rod, and/or the bent track, and/or the portion of retaining track can be pushed into the channel without obstruction by the guide rails of the respective frame member

19. Window casement as claimed in any preceding claim in which at least some of the retaining members and/or the guide members are mushroom shaped.

20. Window casement substantially as herein described with reference to and as shown in the accompanying drawings.

21. Window casement with actuating-rod fittings for windows which can either pivot about a vertical axis or tilt about a horizontal axis in which the frame pieces are formed from metal or, in particular from plastic profiles, these frame pieces possessing an open actuating-rod channel on their rebate side, whilst guide rails for actuating-rods project from the side walls of the actuating-rod channel, half way up the channel, into the open channel cross-section, and form an inner channelspace between the bottom of the channel and the underside of the guide rails; a central channelspace between the mutually facing side surfaces of the guide rails and an open outer channel-space on the side of the guide rails remote from the channel bottom, characterised in that a bent track is attached to the upper frame piece in the region of the pivot-axis comer in the outer channel-space, and particularly characterised in that this bent track is provided with a retaining device, preferably with at least one retaining member in the shape of a T when viewed in cross-section perpendicular to the channel axis, this retaining member extending into the inner channel-space and engaging beneath the undersides of the guide rails; that the tilt-limiting scissor-element is connected, on the casement side, to this bent track; and an upper, concealed section of actuating-rod is guided on the inner side of the bent track, in the central channel-space and/or inside the inner channel-space, this section of actuating-rod carrying a locking cam for locking the tilt-limiting scissor-element in the ready-topivot position, this locking cam engaging through an elongated slot in the bent track, and this section of actuating-rod possessing an elongated slot for the through-engagement of the retaining device, or of the T-shaped retaining member, that the end of the upper, concealed section of actuating-rod, on the operating side, is coupled to an upper, exposed section of actuating-rod, located in the outer channel-space, this section of actuating-rod extending into the inner channel-space by means of guide devices and in particular by means of at least one guide member in the shape of a T when viewed in cross-section perpendicular to the channel axis, these guide devices engaging slidably beneath the underside of the guide rails, that the end of this upper, exposed, section of actuating-rod, on the operating side, is coupled via an upper corner-turning piece to an exposed section of actuating-rod, on the operating side, located in the outer channel-space, and that this exposed section of actuating-rod, on the operating side, is provided with guide devices and in particular with at least one T-shaped guide member, this member extending into the inner channel-space and engaging slidably beneath the underside of the guide rails.