GB2048358A - Connecting form panels - Google Patents

Abstract

A device (1) serves for the connection of form panels (2) which are arranged in one plane and which have at their margins (3) U-shaped stiffening profiles (5) which are opened outwardly in a direction parallel to the form skin (6), hence are directed with the openings (4) respectively towards the corresponding opening (4) on the adjacent panel (2) or the like, and whose outer legs (7) remote from the form skin (6) have a margin (8) bent over towards the form skin (6). The stiffening profiles (5) are to be connected releasably by a removable mounting (9). In so doing, the mounting (9) is provided to grip behind the margins (8) on the inside of stiffening profiles lying against one another. The outer U-legs (7) of the stiffening profiles (5) have, for this purpose, a smaller height than the inner legs (10) of these stiffening profiles. The mountings (9) can thereby be introduced through the gap (15) between the outer U- legs (7). The thickness of the mounting (9) is, in so doing equal to or smaller than the clear spacing of the outer U-legs (7) or the gap (15), so that the mounting (9) is introducible on edge between these U-legs (7) and is then brought into the functional position due to rotation about an axis running approximately perpendicularly to the form skin (6). The mounting (9) has a tensioning element (19) which engages approximately in the region of said mounting lying between the margins (8) and which has an abutment supported on the outside of the form, so that a good bracing of the mounting is possible with simultaneous alignment of the form panels (2) to be connected to one another. <IMAGE>

Description

SPECIFICATION Device for the connection of form elements This invention relates to a device for the connection of form elements, such as form panels, arranged in one plane, which have at their margins U-shaped stiffening profiles which are opened outwardly in a direction parallel to the form skin, hence directed with the openings respectively towards the corresponding opening on the adjacent element, and whose outer legs remote from the form skin have a margin extending at least in regions towards the form skin and which are held together releasably in the functional position by a removable clamp or suchlike mounting.

It is already known from German OLS 2,049,245 and German OLS 2,716,864 to provide stiffening profiles of the above-mentioned type at the margins of form panels. In so doing, the margins of the outer of the Ulegs are intended to lie against one another in the functional position or, at most, to have a small spacing in the region of a form tie bar passing through them in their joint. Beads are provided on the U-crossbars, running at right angles to the form skin, of the stiffening profiles. There serve as mounting U-shaped clamps which grip round the stiffening profiles on the outside and which can be hinged on the stiffening profiles and are fixed in the functional position with a wedge or the like.

The hingeing can be effected only on one of the profiles lying against one another, since otherwise a simple removal of the form would be prevented.

Furthermore, these clamp-like mountings projecting on the outside are obstructive even during transport and storage of the form panels. The bead required on the U-crossbar of the stiffening profile for the engagement of a modified clamp element in German OLS 2,716,864 represents a weakening of this profile, said weakening arising precisely in the region of the profiles which is exposed to the largest pressure under load.

A further inadequacy of this mounting consists in that an exact alignment of the form panels in the joint region is not provided.

Furthermore, the force applied by the clamps cannot be exerted in the region of the stiffening struts abutting the stiffening profiles e.g.

at right angles and guided over the rear side of the form panel, if said stiffening struts are to be brought up against the stiffening profiles. At most, the clamps can be attached next to the corresponding junction point, although this leads to a less favourable introduction of force.

The object of the invention is therefore to provide a device of the above-mentioned type with which a favourable introduction of force is possible at any point along the stiffening profiles, without weakening the profile by the provision of beads, perforations or the like.

According to the invention, there is provided a device for the connection of form elements, such as form panels, which have at their margins U-shaped stiffening profiles which are open outwardly in a direction parallel to the form skin, hence directed in use with the openings respectively towards the corresponding opening on the adjacent form element, and whose outer legs remote from the form skin have a margin extending at least in regions towards the form skin and have a smaller height than the inner legs, the device comprising a mounting adapted to grip behind said margins, the thickness of the mounting being equal to or less than the clear spacing between the outer U-legs of two adjacent stiffening profiles lying against one another, whereby the mounting is introducible on edge between the U-legs and is brought into the functional position by rotation about an axis extending approximately perpendicularly to the form skin and at least one tensioning element engaging in the region of said mounting lying between the margins in use and having an abutment adapted to be supported on the outside of the form elements.

The margins on the outer legs thereby serve for the engagement of the mounting which due to its arrangement on the inside of the stiffening profiles may be disposed at any point desired. Since the margins are adapted for engagement with these mountings, an especial forming on the stiffening profiles for the engagement of the mounting is no longer necessary. The gap for the introduction of the mounting may be made by a spacing initially left as it is when the form panels are joined together or it is also possible that the thickness of the mounting is equal to or smaller than the clear spacing of the outer U-legs of two adjacent stiffening profiles lying against one another and that the mounting is introducible on edge between the U-legs and is brought into the functional position due to rotation about an axis extending substantially perpendicularly to the form skin.Such a form of realisation and arrangement is especially advantageous because the form panels can already assume their final position before they are connected firmly to the subsequently introduced mounting and pulled together in the joint region.

A preferred feature of the invention may consist in that the margin on the outer leg of the stiffening profile is, starting from the Uleg, directed diagonally towards the face to be concreted and the adjacent profile of the adjacent form panel. If a clamp-like mounting is attached to such an inclined face, there arise parallel to the form skin corresponding force components which lead to the desired firm pulling together of the form panels in the joint region.

It is appropriate, in so doing, if the margin extends straight from a bending edge or is planar at least on its inner inclined face. The dimension of the mounting perpendicular to the form skin is appropriately equal to or smaller than the clear spacing between the free edge of the margin and the inner U-leg of the stiffening profile. The mounting can then be brought effectively from the outside between the adjacent stiffening profiles and thereafter pulled back with its retaining projections over the inclined margins, due to which it then connects the stiffening profiles.

Especially with a combination of the abovementioned features and measures there results a form of realisation of the invention which is easy to handle so that it can be used by untrained personnel, whereby in an advantageous way the mounting may be attached at any point whatever of the form panels, hence also distributed in sufficient number over their height.

In a further preferred feature of the invention, the mounting has a tensioning element which engages in the region of said mounting lying between the margins and which has an abutment supported on the outside of the form elements. On the one hand, the mounting can thereby be tightened effectively from outside, due to which the above-mentioned force components take effect correspondingly parallel to the form skin. Furthermore, however, the above-mentioned abutment may serve as an alignment aid.

This is achieved in a simple way especially when the abutment on the tensioning element is designed as a bracket which is displaceable relative to the tensioning element and pressable against the outside of the form panel and which has for simultaneous alignment of the form panels bearing faces aligned with one another for bearing on the adjacent form panels. An improvement of the clamping effect of the mounting may be achieved due to the fact that the mounting has two projections which grip behind the margins and engage on their inclined faces and which lie in the functional position, that is after the tightening of the tensioning element, with their end faces simultaneously against the inside of the outer U-legs. There results thereby an especially firm and stable interconnection in the region of the mounting and the risk of deformation under the influence of a load is prevented.

This effect can be further improved due to the fact that the mounting is formed by at least one flat iron bar or the like which has to constitute the two projections griping behind the bends open slots remote from the form skin for the entry of the margins. In so doing, at least the edge, respectively gripping behind a margin, of the slot of the mounting may extend diagonally in relation to the centre axis of the mounting, whereby the orientation of this inclination corresponds in the functional position at least approximately to the inclination of the margin. There results therefrom in the functional position a bearing which runs over the entire overlap between the edge of the slot and the margin and which arises additionally to the bearing on the inside of the outer leg and thus leads to a stable positioning.Furthermore, the slot may be narrowed towards its closed end and the edge of the slot situated on the outside of the margin may run preferably parallel to the centre axis of the mounting and/or at right angles to the form skin. This enables the margin to be caught, preferably clamped, in the functional position at least at its free edge on both sides in the slot.

The aligning effect of the device as a whole may be improved when the abutment has a length exceeding or overlapping the width of stiffening profiles lying against one another and that it has at least at its ends bearing faces for pressing against the outside of the form, especially against stiffening struts provided on the form panels. This bracket can thereby fulfil even better its double function, on the one hand, to serve as abutment for the inner clamp and, on the other hand, to align the form panels flush with one another, because, on the one hand, the alignment is simplified due to the larger spacing of the bearing faces and, on the other hand, also larger forces can be transmitted.

The abutment bracket may have additionally in the region of the mounting bearing faces which lie in the functional position against the outsides of the outer legs of the stiffening profiles. The outer leg of the stiffening profiles is then thereby clamped firmly between this additional bearing face and the end side of the corresponding projection of the mounting, so that there arises, altogether, upon the connection of the form panels not only a force lock, but also at least in one plane a form lock.

The stiffening struts may be connected flush to the stiffening profiles and preferably have the same height and the bearing faces of the abutment bracket may in this case all be aligned with one another. In so doing, it is possible in an advantageous way to arrange the device according to the invention in the region of the butting together of the stiffening struts with the stiffening profiles. However, a modified form of realisation may consist in that with stiffening struts offset vertically in relation to the stiffening profiles the bearing faces of the abutment bracket are offset and/ or subsequently adaptable, preferably adjustable in the same way.

It results from the foregoing that with a combination of a clamp-like mounting having corresponding introduction slots for the margins with a bracket serving as abutment for a tensioning element of this mounting a firm connection of adjacent form panels at any point whatever, particularly in the region of transverse struts, is possible without perforations, deformation of the webs especially important for stiffening perpendicular to the form skin or the like being necessary on the stiffening profiles, so that even an interconnection of several form panels connected in this way may be changed over without dismantling.

A further development appropriate for the simplicity of the entire construction may consist in that the tensioning element is designed as a bolt piece or the like and is connected to the mounting at least in a tension-proof manner. In so doing, it is, as a rule, appropriately connected firmly, optionally welded, to the mounting, so that also the above-described introduction of the mounting in a position at right angles to its functional position and the subsequent turning into the functional position can be effected easily.

Clamping parts provided with inclined faces may be provided in a longitudinal direction relative to the bolt for the fixing of the abutment upon the bracing of the form elements.

In so doing, it is possible that there is provided as clamping part a nut which interacts with an external thread provided on the bolt and which engages over the bolt on its outside or also in a perforation. Another form of realisation may consist in that a wedge passing through or gripping behind the bolt and/ or the bracket is provided as clamping part, whereby a slot is provided for this wedge at least in the bolt and optionally also in the bracket and the wedge may simultaneously form a lock against turning for the bracket.

However, as a lock against turning between the tensioning element and bracket the tensioning element, also may have at least in regions a contour diverging from a circular cross section and the bracket recess engaging over this region a corresponding inner shape.

In a preferred embodiment, a compensating form element is provided on the tensioning element and/or the mounting on the side lying opposite the end faces of the projections of the mounting and the width of the mounting is enlarged preferably by the width of the compensating element. The mounting can thus be used to adjust the dimension of a form. In this case, upon the bracing of the mounting it is ensured that the adjacent form panels are tensioned and pulled against the compensating form element situated therebetween. The introduction of the holding element is then effect due to the fact that with the form panels unassembled said element is introduced therebetween until the mounting lies against the inner legs. In this position the compensating form element projects beyond the form skin.The form panels are now pulled together until they butt against the compensating element, whereafter the mounting can be pulled back. It then catches with its slots or the like the margins of the stiffening profiles of the two form panels and upon the bracing of the device pulls them firmly against the compensating element. In so doing, it is advantageous if there is provided as compensating element a rolled U-shaped profile whose U-legs lie against the mounting and are preferably fastened, especially welded there.

These U-legs then constitute simultaneously stops for the end sides, otherwise directly abutting one another, of the margins of the form panels.

In many cases it may also be appropriate if the bracket is provided for the passage of several tensioning elements or the like.

Thereby, either a compensating element designed as a form panel with correspondingly several mountings can be included or a bracket arrangement offset in relation to the joint of two form panels is also possible, due to which said bracket is suitable for the clamping of additional stiffening supports, square timbers or the like.

In so doing, it is especially appropriate if the bracket has a slot directed in its longitudinal direction for the passage of several parallel tensioning elements and/or for an engagement of a tensioning element offset in relation to its centre. It is also possible thereby that here, too, form tie bars are provided. In two form panels adjacent one another are offset vertically to one another so that the stiffening webs or struts, abutting the stiffening profiles, of adjacent form panels are no longer aligned with one another, the device moreover permits an inclined engagement of the bracket if said bracket is turnable in relation to the tensioning elements.

Besides the connection of form panels lying in one plane, the invention also permits a form of realisation to constitute form corners.

It consists, above all, in that an angle piece is provided as abutment and there is arranged on each angle leg on its side adjacent the face to be concreted at least one mounting which has the construction according to the invention and can therefore engage between two stiffening profiles in order to pull them together in the functional position. As an additional combination possibility it is also of importance how a form tie bar can engage in the region of the mountings for the corner connection and how the abutment and its bracing possibility are conceived especially with the inner corner and the correspondingly constrained conditions of space.

However, it should also be mentioned that the device may be additionally further developed and designed for additional purposes especially also for the planar region of form panels due to the fact that the length of the region, surmounting the abutment bracket or the like, of the tensioning element carrying the mounting is larger than the thickness of a square timber or suchlike additional part to be fixed on the outside of the form. The abutment bracket may then, on occasion, come to rest also with a little spacing from the actual form panel, whereby this spacing is then filled by square timbers or suchlike parts to be fixed which are clamped there by means of this bracket and then additionally ensure simultaneously the tensioning force and the aligning force on the form panel.

A considerable advantage of the spacing between the margins of stiffening profiles lying against one another consists in that lugs or projections of cantilevers, stays or the like may be inserted into this spacing, so that they are held in a form-locking manner in a direction transverse to this slot between stiffening profiles lying against one another.

Above all with a form of realisation where the abutment is to be turnable in relation to the tensioning element it is advantageous if there is provided on the outer end of the tensioning element for the mounting a grip with which the tensioning element and the mounting fastened thereto and then situated on the inside of the stiffening profiles lying against one another are turnable.

The invention together with its substantial feaures is described in detail hereinafter with reference to the drawings wherein: Figure 1 is a plan view of an exemplary embodiment of the device according to the invention, in which the stiffening profiles and the form skin of two form panels lying against one another and held by the device are illustrated in cross section, Figure 2 is a view of the rear side of the form panels and the device which engages thereon and which is illustrated partly cutaway, Figure 3 is a schematised and diagrammatic representation of the arrangement of a form with opposing form walls, whereby adjacent form panels are held together by several vertically offset devices according to the invention and the arrangement of form tie bars is illustrated, Figure 4 is a plan view of a modified embodiment of the device according to the invention, in which a wedge is provided to brace the mounting in relation to its abutment, Figure 5 shows a modified embodiment corresponding to Fig. 4 in which a thread with a nut serves for the bracing, Figure 6 shows an embodiment of the invention in which there is welded to the mounting a U-shaped compensating element against which the form panels adjacent one another can then be laid and fastened in the spacing of this compensating element, Figure 7 shows an embodiment in which a compensating form sheet overlapping the form skin is fastened to the device where the mounting is divided into individual parts adjustable parallel to the form skin for adaptation to different spacings of the adjacent form panels, Figure 8 shows an embodiment of a device with two parallel mountings which permit the inclusion of a compensating element which has stiffening profiles at its parallel margins, Figure 9 shows an embodiment corresponding to that of Fig. 8 in which the compensating element has no stiffening profiles, but engages on the abutment bracket by means of a tie bar or the like, Figure 10 is a rear view of the abutment bracket according to Fig. 8 and especially Fig.

9, whereby different positions of tensioning elements or tie bars are suggested, Figure 11 is a cross section and plan view of the corner region of a form with outer corner and inner corner, Figure 12 is an enlarged view of the detail A marked by a circle in Fig. 11, Figure 13 is a section running parallel to the form skin through the engagement region of a mounting of an inner corner, whereby two possibilities of a lock against turning for this mounting are suggested, Figure 14 is a view of an inner corner, Figure 15 is a cross section through the margin of a form panel with a recess for a form tie bar on to the sectional line XV-XV in Fig. 16, Figure 16 is a view of the recess at the margin of a form panel according to Fig. 15, in which the margin profile and the form tie bar are shown in section, Figures 1 7 to 24 are various schematised views and cross sections of examples of application of the connecting and holding device according to the invention.

A device designated as a whole by 1 which may have according ta the following descriptions different forms of realisation which are then each provided with different reference numerals, but is always provided as a whole with the reference numeral 1 serves to con nect form elements arranged in one plane, especially form panels 2 or corner elements described below with reference to Figs. 11 to 1 3 or also to connect other form parts such as square timbers, cantilevers and the like with forms according to Figs. 1 7 to 24.

The form panels 2 or the like have at their margins 3 U-shaped stiffening profiles 5 which are opened outwardly in a direction parallel to the form skin, hence directed with the openings 4 respectively towards the corre sponding opening 4 on the adjacent panel 2 or the like, and whose outer legs 7 remote from the form skin 6 have a margin 8 bent round towards the form skin 6, and which are held together releasably in the functional position by a clamp or mounting 9 described in detail below (see e.g. Figs. 1 to 3, Figs. 6 to 9 and 11 to 14).

In the various examplary embodiments it will be seen that the stiffening profiles 5 are fastened with their inner legs 10 to the form skin 6 on the side remote from the concrete e.g. by means of screws 11 countersunk in the form skin 6, whereby there is joined to and moulded on the margin 1 2 of these inner legs optionally via a bead 1 3 a fold 14 which overlaps the end side of the form skin panels 6 and terminates preferably flush with the surface adjacent the concrete of the form skin 6.

A mounting 9 is provided to grip behind the margins 8 on the inside of stiffening profiles 5 lying against one another, which in the embodiment of Fig. 1 especially simple and appropriate, yet occurring in most cases may be realised especially simply due to the fact that the outer U-legs 7 of the stiffening profiles 5 have respectively a smaller height than the inner legs 10 situated in the region of the form skin 6, so that the mounting 9 is introducible through a gap 1 5 (see e.g. also Fig. 3) between the outer U-legs.

For example, with reference to Fig. 2 it is seen that the thickness of the mounting 9 is equal to or, as in the exemplary embodiment, smaller than the clear spacing, constituting the gap 15, of the outer U-legs 7 of two adjacent stiffening profiles 5 lying against one another and that the mounting 9 is introducible on edge between the U-legs 7 and is brought into the functional position due to rotation about an axis running approximately perpendicularly to the form skin 6. With such an arrangement, from which it is, however, also possible to diverge according to special forms of application and exemplary embodiments which will be described hereinafter, the form panels 2 may be set up directly abutting one another, whereafter the device 1 is attached and fixed, thus leading to the connection of the form panels 2.

The margin 8 on the outer leg 7 of the stiffening profile 5 is, starting from the U-leg 7, directed diagonally towards the face to be concreted and the adjacent profile of the adjacent form panel 2. In so doing, the margin 8 is, starting from its bending edge 1 6 or suchlike change of direction, made straight or plane at least on its inner inclined face 1 7.

The dimension of the mounting 9 perpendicular to the form skin 6 is equal to or smaller than the clear spacing between the free edge 1 8 of the margin 8 and the inner U-leg 10 of the stiffening profile 5. The mounting 9 can therefore be turned in this gap or else fitted well therein upon lateral pushing-in without colliding with the margins 8.

To enable rapid and simple assembly, the mounting 9 has a tensioning element 1 9 which engages in the region of said mounting lying between the margins 8 and which has an abutment supported on the outside of the form and described in detail below. The mounting 9 can be tightened in relation to this abutment by means of the tensioning element 19, due to which there arise parallel to the form skin 6 via the inclined faces 1 7 of the margins 8 corresponding force components which lead to a pulling together of the form panels with a simultaneous alignment of the form skins 6.For this purpose, the mounting 9 has two projections 20 which grip behind the margins 8 and engage on their inclined faces 1 7 and which lie in the functional position, that is after the tightening of the tensioning element 19, with their end faces 21 simultaneously against the inside of the outer U-legs 7. This brings about also at least partly the above-mentioned aligning effect. Furthermore, this results in a firm and stable seat with simultaneous bracing of the outer legs 7 and of the margins 8 which can transmit the various forces better in this way.

It is provided in an advantageous way that the mounting 9 has to constitute the two projections 20 gripping behind the margins 8 open slots 22 remote from the form skin 6 for the entry of the margins 8. These slots 22 are thus situated next to the two projections 20 and are limited, in turn, by an inner projection 23 or the like on which the tensioning element 1 9 can engage centrally. The tensioning element could optionally also be provided in one piece from this inner projection 23 or be formed thereby, which would be a further possible form of realisation of the invention.

An improvement of the force components parallel to the form skin 6 may be achieved due to the fact that at least the end, respectively gripping behind a margin 8, of the slot 22 of the mounting 9 runs diagonally in relation to the centre axis of the mounting 9, the orientation of this inclination corresponding in the functional position at least approximately to the inclination of the margin 8.

Even during the pulling together, but also in the functional position, there then results a surface contact between the margin 8 and the outer margin of the slot 22. The pressure per unit of area is correspondingly small and the entire arrangement comes correspondingly close to a form lock. In the exemplary embodiments it is also provided that the slot 22 narrows towards its closed end and that the margin, situated on the outside of the margin 8, of the slot 22 runs preferably parallel to the centre axis of the mounting 9 and consequently at right angles to the form skin 6. The slot thereby becomes wider at its free end, so that "finding" the edge of the margin 8 upon the attachment of the mounting after the turning thereof into the functional position is facilitated.

The margin 8 is in the functional position e.g. as shown in Fig. 1 caught and clamped on both sides at its free edge in the slot 22, due to which the risk of deformation is avoided under a higher load and, moreover, a good force transmission is made possible.

The above-mentioned abutment may in an especially favourable and advantageous embodiment also represented in the drawings be provided on the tensioning element 1 9 as a bracket 24 which is displaceable relative to this tensioning element 1 9 and pressable against the outside of the form panel 2 or the like and which has for the simultaneous alignment of the form panels 2 bearing faces 25 aligned with one another for bearing on the form panels 2 adjacent one another.Although the abutment could be limited in its dimension to the total width of the stiffening profiles 5 lying against one another, it is, however, appropriate for the above-mentioned advantageous alignment of adjacent form panels if the bracket 24, as provided in the exemplary embodiments, has a length exceeding or overlapping the width of stiffening profiles 5 lying adjacent one another and if there are provided at least at its ends bearing faces 25 for pressing against the outside of the form, especially against the stiffening struts 26 provided on the form panel. The mounting 9 may also be attached in a region of the form panels where such stiffening struts 26 butt flush and at right angles against the stiffening profiles situated at the margin, because the mounting 9 engages flatly on the inside of the stiffening profiles 5.In combination with the bracket 24 serving as abutment, but extending beyond the stiffening profiles 5, this results in an especially good combination with the requirement also of aligning the form panels simultaneously with their fixing to one another. This is improved if the abutment bracket 24 has in the region of the mounting 9 additional bearing faces 27 which lie in the functional position against the outsides of the outer legs 7 of the stiffening profiles 5. This is to be seen especially well and clearly in Fig.

1.

Fig. 1 shows, as with other exemplary embodiments, how the stiffening struts 26 are connected flush to the stiffening profiles 5, this connection being effected appropriately by welding. In so doing, they have appropriately the same height so that the bearing faces 25 and 27 of the abutment bracket 24 can all be aligned with one another.

However, it would, of course, also be possible that the stiffening struts 26 are vertically offset in relation to the stiffening profiles 5 on their outsides, whereby the bearing faces 25 and 27 of the abutment bracket 24 would then have to be offset to one another in the same way. These bearing faces, especially the outer bearing faces 25, could optionally be adaptable also to such an offset e.g. by shims or adjustment facilities.

Fig. 1 also shows that a recess 28 constituting a spacing in relation to the form may be provided between the inner bearing faces 27 and the outer bearing faces 25 of the abutment bracket 24. It is ensured thereby that the bracket serving also for alignment truly acts as a support with its outer bearing faces 25 and does not come to rest in a region situated nearer to the stiffening profiles on an irregularity of a stiffening strut 26 or the like, due to which the alignment could be endangered.

Fig. 2 illustrates that at least the outer bearing faces 25 of the abutment bracket 24 may have a greater width than the bracket 24 itself and optionally even than the stiffening struts 26, so that the pressure per unit of area is effectively distributed and, in an application yet to be described, in which square timbers or the like are to be clamped between the bracket 24 and the form, a correspondingly effective distribution of the compressive forces is achieved. Furthermore, the possibility also results thereby of offsetting the bracket in relation to the struts or, with vertically offset adjacent panels and correspondingly turned bracket 24 (see Fig. 20), of nevertheless obtaining a sufficiently large bearing face so that the abutment forces for the mounting 9 and the forces applied simultaneously therewith to align the form panels may be made sufficiently large.

It will be seen e.g. in Fig. 2 that the mounting 9 may be formed from at least one flat iron bar or the like, whose thickness is less than the spacing of the margins 8 with stiffening profiles 5 lying together. Such a flat iron bar may be manufactured simply and also be provided easily with the slots 22. Furthermore, this arrangement permits the abovementioned introduction of the mounting in an on-edge position which is therefore at right angles to the subsequent functional position.

The above-mentioned tensioning element 1 9 may be designed in various ways. One appropriate form of construction which is realised e.g. in Figs. 1, 4 and 5 consists in that the tensioning element is designed as a bolt piece and is connected to the mounting 9 at least in a tension-proof manner, in the exemplary embodiment firmly in general. Clamping parts provided with inclined faces in relation to the bolt piece 29 may be provided for the fixing of the abutment on the bracing of the form. In the embodiment of Figs. 1 and 5 there is provided as clamping part a nut 31 interacting with an external thread 30 provided on the bolt 29 and engaging over the bracket 24 on its outside, or in a form of realisation not shown in a perforation. Said nut permits a dosed and yet strong force deployment.

Figs. 4 and 8 show as clamping part a wedge 32 passing through the bolt 29 and in Fig. 4 also simultaneously the bracket 24 or gripping behind the bracket according to Fig.

8, whereby a slot 33 is provided for this wedge 32 in the bolt 29 and in the exemplary embodiment according to Fig. 4 also in the bracket 24 and the wedge 32 may constitute simultaneously a lock against turning for the bracket 24 in relation to the bolt 29. The wedge and wedge faces are arranged so that the knocking-in of the wedge leads to a displacement of the mounting 9 towards the bracket 24.

Fig. 5 shows another possibility of the lock against turning which consists in that between the tensioning element 1 9 and bracket 24 the tensioning element 1 9 has at least in regions a contour diverging from a circular cross section and the recess, overlapping this region 34, of the bracket 24 has a corresponding inner shape. A rotation on the bracket 24 leads in this case also to a rotation of the mounting 9.

In other exemplary embodiments it is provided that the bolt 29 engaging on the mounting 9 has as a whole a circular cross section so that without a lock against turning passing through the two parts or engaging thereon a relative turning between the mounting and bracket is possible. Above all, it may be appropriate in this case if there is provided especially on the outer end of the tensioning element 1 9 or of the bolt 29 for the mounting 9 a grip 35 with which the tensioning element and the mounting 9 fastened thereto are turnable. This facilitates, on the one hand, any application whatever of the bracket on the outside of the form or else on the outside of parts to be pressed against the form, while on the inside of the stiffening profiles 5 to be connected to one another the mounting can nevertheless be turned conventiently into the correct position.Such a grip 35 is suggested in Fig. 11 which also serves to describe a possible corner connection. It will be seen that in this case there is provided a grip 35 which passes through the tensioning element 1 9 displaceably in a perforation and which has in the exemplary embodiment at its two ends stops 36 overlapping the perforation in the tensioning element 1 9. This grip 35 may thereby be displaced in a way known per se again into a convenient starting position after half a revolution.

It may be mentioned that there could be provided instead of such a grip projecting beyond the contour of the tensioning element also at the free end of the tensioning element 1 9 a deformation or the like for the engagement of a tool to effect the turning action.

Regarding Fig. 5 it may also be added that the initial region 34, fastened to the mounting 9, of the clamping bolt 29 is polygonal, preferably square, and that there is provided on the polygon especially an outwardly leading thread region for a clamping nut 31. A metric thread is suggested in Fig. 5, while it is provided in Fig. 1 that the clamping thread 30 corresponds to that of a form tie bar, so that also a corresponding nut may be used, as with form tie bars, thus facilitating storage.

In many cases form panels adjacent one another may not be connected directly to one another, but corresponding compensating form elements are necessary to compensate for intermediate sizes. The present invention affords due to a form of realisation of especial importance the possibility of fixing together with the mounting between such adjacent form panels such variously conceivable compensating elements described in detail hereinafter with reference to examples. It is possible, in so doing, that a compensating form element 37, 38 or 39 is provided on the tensioning element 1 9 and/or the mounting 9 on the side lying opposite the end faces 21 of the projections 20 of the mounting 9 and the width of the mounting 9 or of the mounting region is enlarged preferably by the width of this compensating element.

Fig. 6 illustrates an exemplary embodiment for this purpose in which there is provided as compensating element 37 a rolled U-shaped profile whose U-legs 40 lie against the mounting 9 enlarged by the width of the U-crossbar 41 and are fastened, namely welded, there in the exemplary embodiment. The arrangement is such that the outside 42 of the U-crossbar 41 of the compensating element 37 is aligned in the functional position with the outside of the form skin 6 of the adjacent form panels 2.

For the assembly of this device 1 with compensating element 37 fastened thereto the entire device is firstly displaced transversely to the form skin 6 in the longitudinal direction of the tensioning element 19, the bracket 24 being removed or released, whereafter the two form panels are brought together until they directly abut the mounting towards the U-legs 40. Also the slots 22 of the mounting 9 and the margins 8 of the stiffening profiles 5 thereby reach the position fitting one another. If the device 1 is brought into the functional position, that is the mounting 9 is pulled back, the compensating element 37 is consequently also simultaneously pulled back and brought into alignment with the form skins 6.There then arises a connection which corresponds to the exemplary embodiment according to Fig. 1 and with which there is present only between the margins of the form panels a larger spacing which is bridged by the compensating element 37 connected firmly to the device 1. With a sufficiently firm tightening of the clamping nut 31 the entire connection is so stable that also such an interconnection of form panels could be changed over e.g. with a crane without dismantling analogously to an interconnection according to Fig. 1.

In a modified exemplary embodiment according to Fig. 7 it is provided that there is disposed on the region of the tensioning element 1 9 lying in the functional position on the inside of the stiffening profiles 5 a transverse spar 43 on which a mounting part 44 is mounted displaceably parallel to the form skin 6 and that there is arranged at the end of the tensioning element 1 9 a compensating element 38, for example a sheet-metal panel, overlapping the form skin 6 of the adjoining form panels 2. With such a device 1 form panels adjacent one another with different spacings may be connected to one another and mutually aligned.Due to the tensile force of the tensioning element upon clamping a corresponding clamping force is transmitted via the transverse spar 43 and the mounting parts 44 to the outer legs 7 of the stiffening profiles 5, while the connecting bracket 24 clamps these legs from outside, so that, altogether, a frictional connection arises in which the compensating panel 38 is not loaded or is not loaded very much in an advantageous way.

In the exemplary embodiment it is provided that the transverse spar 43 has a polygonal, especially square cross section and that the mounting parts 44 have a sleeve 45 or suchlike guide which runs parallel to the form skin 6 and whose inner contour corresponds to the outer contour of the transverse spar 43 and which permits, on the one hand, the lateral displacement of the mounting parts 44 and, on the other hand, the transmission of the transverse force from the spar 43 to the mounting parts 44.

In the above-described embodiments according to Figs. 6 and 7 and the embodiments yet to be described according to Figs. 8 and 9 it will be seen that especially with the additional arrangement of a compensating part 37, 38 or 39 the bearing face 25 of the abutment bracket 24 runs over its entire length and that the bearing faces 25 and 27 go over into one another, hence a recess 28 is missing. This is of advantage, above all, in an application according to Fig. 7, but also Figs. 8 and 9, where spacings of different widths are to be capable of being bridged equally well.

As shown in Figs. 8 to 10 it is possible that the bracket 24 may be provided for the passage of several tensioning elements 1 9 or the like. An especially appropriate embodiment in this respect which may be seen, above all, with reference to Fig. 10 consists in that the bracket 24 for the passage of several parallel tensioning elements 1 9 or the like and/or for an engagement, offset in relation to its centre, of a single tensioning element 1 9 has a slot 46 directed in its longitudinal direction.

This embodiment enables, with an arrangement according to Fig. 1, the one end of the bracket to stand substantially longer to the side in relation to the other end, starting from the tensioning element, which may be of advantage e.g. in the fixing of additional parts in this region or with unfavourable opposing bearing faces.

However, this arrangement serves primarily to fix a compensating panel 39. In the two cases of Figs. 8 and 9 the bracket 24 has at least two tensioning elements 1 9 passing through it, each with a mounting 9. The slots 22, remote from one another, of the two mountings 9 each accommodate a bend 8 of a stiffening profile 5 of a form panel at the side of the gap to be compensated and the above-mentioned compensating panel 39 aligned with the form panels 2 is inserted between the form panels 2. According to Fig.

8 this compensating panel 39 may be fastened on the sides adjacent one another of the mountings 9 by means of corresponding stiffening profiles 5, so that, in practice, there result two connecting points similar to those of Fig. 1 which are directly adjacent one another and which are bridged by a common bracket 24. In Fig. 9 it is provided that the compensating panel 39 is fixed by means of a special tensioning element 47 to the abutment bracket 24. This tensioning element 47 consists of a bolt part 48 on which a nut 49 or optionally also a wedge can engage, while there are fastened to the form panel one or two angle pieces 50 to which the bolt part 48 is fixed, especially welded.In this case, also, the bracket 24 is, as with the above-described embodiment, turnable and optionally fixable in relation to the mounting 9, so that optionally with an inclined arrangement of the bracket also the spacing of a vertical projection of the mountings is adjustable for adaptation to compensating panels of different widths. Although this spacing is adjustable also due to a displacement in the slot 46, the pivoting of the bracket to reduce the spacing of the adjacent form panels would have the advantage that the tensioning elements can be held respectively in a form-locking manner by the ends of the slots at least to one side, while with a relative displacement on the inside of the slot only a force lock is then available.

The device according to the invention is suitable, with corresponding adaptation to the particular purpose, in an advantageous way also for constituting a form corner, as is illustrated especially in Figs. 11 to 14 or 1 6.

In this case, there is provided as an abutment an angle piece 51 for the outer corner and an angle piece 52 for the inner corner and at least one mounting 9 is arranged on each angle leg on its side adjacent the face to be concreted. In the form of realisation illustrated in the drawing the legs of the angle pieces 51 and 52 are connected rigidly and in one piece at a given, in the exemplary embodiment a right angle. However, it would also be possible to make the legs of the angle pieces 51 and 52 adjustable in their angle to one another via flexible connections, hinges or the like.

For the construction of the form corner according to the invention it is appropriate if there are supported in the joint region, illustrated separately and more clearly in Fig. 12, of the form panels 2, at an angle to one another, of an outer corner the corner stiffening profiles 53 which are provided for engagement on the diagonally adjacent mountings 9 and which run in one piece or as a continuation of one another over the entire form height and are connected, preferably welded, to one another on their side remote from the form skin 6. Fig. 11 shows that these corner stiffening profiles 53 of the outer corner have approximately the form of a Y in a cross section, whereby the outer free margins 54 have legs 55 with bends 8, said legs corresponding to the outer U-legs 7 of the stiffening profiles 5 and standing at the angle of the corner to one another.Distributed over the height of the corner stiffening profiles 53, gusset plates 57 are arranged, in the exemplary embodiment welded, between the webs 56, arranged at right angles to the outer leg 55, of the corner stiffening profiles 53 for the reinforcement and connection thereof. The outer legs 55 of the corner stiffening profiles 53 are aligned with the outer legs 7 of the adjacent form panels 2. There thus results a corner connection which has the advantage that also in the immediate corner region the construction of the profiles to be connected corresponds to that of those which are to be connected also in the plane region of a form panel, so that, again, mountings 9 may be used with their advantages.

Fig. 11 reveals that the angle legs of the angle piece 51 of the outer corner are connected via an inclined region 58 which lies in the edge region and which constitutes a bevelling of the corner. Furthermore, a better force transmission thus results in the immediate corner region. For a rectangular outer corner, as shown in the exemplary embodiment, the Y-legs 55 of the corner stiffening profiles 53 and the legs of the angle pieces 51 stand at right angles to one another and the connection 58 of the angle legs forms with these angle legs an angle of 135 .

It will be seen especially in Fig. 1 2 that the corner stiffening profiles 53 are bent in the joint region respectively to the height of the inner legs 10, lying on the outside of the form skin 6, of the stiffening profiles 5 engaging there and the inner ends of these bends 59 meet one another preferably at right angles on the end sides of the form panels 2 standing at an angle to one another and are especially welded thereat. The bends 59 of the Y-legs thus constitute in this region an angle profile which can be inserted into the corner region formed by the end margins of the form skins 6 of the form panels 2. In Fig. 12 a joint is suggested in a way not corresponding to reality in order to illustrate the arrangement.

Connected to the inner corner designated as a whole by 60 are likewise stiffening profiles 61 which correspond to the stiffening profiles 5 of the form panels 2 and to whose ends adjacent the form is joined, in the exemplary embodiment welded, the form skin 62 of the inner corner 60. This arrangement, also, may be seen, above all, in Fig. 11. Distributed over the height of the form, there are inserted, especially welded, between the legs 63 of the form skin 62, constituting an angle, of the inner corner 60 and preferably the stiffening profiles 61 connected thereto gusset plates 64 or suchlike stiffenings which have with a rectangular corner according to the exemplary embodiment an approximately square shape.

On the angle piece 52 belonging to the inner corner 60 the passage 65 for the tensioning element 1 9 of the mounting 9 of the one angle leg is vertically offset in relation to the corresponding passage 65 on the other angle leg, as may be seen, above all, in Fig.

1 4. Additionally, there is provided on the angle piece 51 of the inner corner 60 an engagement for a form tie bar 66 which is vertically offset in relation to the passages 65 for the mountings 9. In so doing, the engagement points for the form tie bars 66 may lie respectively at the same height on the angle piece 52 of the inner corner 60 in both legs.

The engagement points of the form tie bars 66 are arranged, in the exemplary embodiment, in the centre between the vertically offset passages 65 for the tensioning elements 1 9 of the mountings 9, so that, altogether, a force transmission as symmetrical as possible results.

In the exemplary embodiment there are provided as an engagement for the form tie bars 66 nuts 67 or suchlike threaded parts which engage on the sides of the angle piece 52 remote from the form and whose internal thread corresponds to the external thread of the form tie bars 66. In so doing, the nut 67 or the like may be fastened, especially welded, fixedly against rotation to the angle piece 52, as is suggested in Fig. 1 2 in the region of the inner corner.

In a modified embodiment shown in Fig 14 the angle piece 52 may, however, have in the region of the form tie bar 66 a marginally open slot 68 with a width corresponding approximately to the diameter of the form tie bar 66 for a lateral introduction from the side of the form tie bar provided with the nut 67 or suchlike stop. Besides the assembly aid provided thereby, also dimensional inaccuracies may be compensated as a result.

It will be seen, above all, in Figs. 1 3 and 1 4 that the mounting 9 has in the region of the inner corner 60 a threaded sleeve 69 or suchlike, preferably, again, a welded-on nut, into which there engages from outside as tensioning element a threaded rod 70 which is mounted turnably, but fixedly in a longitudinal direction. If this threaded rod 70 is turned, the mounting 9 can thus be adjusted in an axial direction.On the side, remote from the form skin 6, of the angle legs of the angle piece 52 provided on the inner corner 60 there are provided in the exemplary embodiment, e.g. also for the engagement of a tool, grips 71 or suchlike parts which are connected fixedly against rotation to the threaded rod 70 passing through the angle piece 52 and which have in the exemplary embodiment a peripheral groove 72 into which at least one projection 73 or suchlike lug connected firmly to the angle piece engages. Although these grips 71 or the like are thereby turnable, they are fixed in an axial direction. These grips 71 may be turned to brace the mounting 9, due to which the slots 22 of the mountings 9 interact with the corresponding bends in the desired way and brace with one another the inner corner 60 and the form panel connected thereto.

According to Fig. 1 3 it is provided in this exemplary embodiment that two flat iron bars constituting the mounting 9, corresponding to one another and having mounting slots 22 or the like are fastened to the nut or threaded sleeve 69 through which passes the turnable threaded rod 70 and the threaded rod 70 engages symmetrically between these two flat iron bars constituting the mounting 9. The mounting 9 is locked against turning in the region of the corner connection, so that the turning of the threaded rod does not lead to assembly difficulties. To lock the mounting 9 against turning, there may be provided at least one pin 74 or suchlike projection projecting thereon and engaging into a recess of an adjacent profile.To avoid the necessity of having special form panels provided for the corner region, it is appropriate if the locking pin 74 engages into the corner stiffening profile 61 belonging to the inner corner 60 and there especially into a slot directed perpendicularly to the face to be concreted. It then permits the axial displacement of the mounting 9, but not the turning thereof.

An additional or other possibility consists in that there is provided as turning lock on the side, adjacent the mounting 9, especially of the inner corner stiffening profile 61 a projection 75 or the like which engages especially with a little play into the gap between the two parts accommodating the nut 69 or suchlike threaded sleeve between them and constituting the mounting 9. A weakening of one of the stiffening profiles due to a slot is thereby avoided and, moreover, the double arrangement of the mounting 9 is utilised even further.

For an easy passage of the form tie bars 66, whether in the region of a corner connection or between two forms, there may be provided the appropriate form of realisation which is illustrated in Figs. 15 and 1 6 and which consists in that the stiffening profile 5, 53 and/or 61 has to constitute a passage for a form tie bar 66 with its profile strip or folds 1 4 lying against the end faces of the form panels 2 a cut-out 76 or recess running through this end face in the direction of orientation of the form tie bar 66. The depth of this cut-out or recess 76 may correspond appropriately to the smallest cross-sectional length, especially to the smallest diameter of the form tie bar 66, and said tie bar can fit into the recess 76 at least without a lateral protrusion.It is thereby possible that no such recess is necessary on the adjoining opposing form panel, thus favouring a stepless vertical offset of the form panels or other form parts abutting one another.

Especially for the additional possibilities of use according to Figs. 21 to 24 yet to be described it is advantageous if the length of the region, surmounting the abutment bracket 24 or the angle pieces 51 or 52, of the tensioning element carrying the mounting 9 is larger than the thickness of a square timber or suchlike additional part to be fixed to the outside of the form. As already mentioned at another point, it is thereby possible to attach to the tensioning element the connecting bracket or the other abutment part or elsc an additional stop part to be held with the clamping nut or the like and consequently to fix attachments, scaffolding parts, cantilevers or the like to the form according to the invention.

In Fig. 1 7 it is suggested how also two adjacent form panels vertically offset to one another may be connected easily with the device according to the invention, without it being necessary to insert intermediate pieces or to provide special perforations, slots or the like on the stiffening profiles 5 on the margin side.

Fig. 1 8 shows in addition to the form panels adjacent the connection how also storeys may be added to a form with a connection bracket 24 according to Figs. 8 to 10, whereby the mounting is arranged eccentrically to the centre of the bracket, since the connecting bracket is intended to reach with its longer region to the first stiffening strut 26 running parallel to the margin to be bridged.

Another possibility of varying the height of form panels corresponding to Fig. 3 is shown in Fig. 1 9 where the form panel is arranged turned through 90 and is provided with an additional part fixed via the device according to the invention.

Fig. 20 shows an alternative version of Fig.

19, whereby the stiffening struts of the form panels to be connected to one another are mutually offset, although this can be overcome due to a turned and thus inclined connecting or abutment bracket 24.

In Fig. 21 a walkable cantilever 77 is fastened to a form panel 2, the device 1 according to the invention being used to clamp and fix a corresponding cantilever part 78 in the above-mentioned way by means of the bracket 24.

Fig. 22 shows the connection of a stiffening brace 79 exactly in the joint region of two adjacent form panels. The detail marked by the circle B is shown more clearly in Fig. 23 and it will be seen how a brace part 80 is pressed by means of the device 1 against the form and especially against the stiffening profiles 5, whereby this brace part 80 has in an advantageous way projections or lugs 81 which can engage into the gap between the bends 8 of the stiffening profiles 5 lying against one another, due to which a lock against turning of these brace parts 80 is obtained.

Finally, Fig. 24 illustrates how the abutment bracket 24 may be used to fix two square timbers 82 or to fasten additional boards 83 or the like to the outside of a form panel 2. In this case, the connecting bracket is then supported on the outside of the part to be fixed additionally and transmits its clamping forces via this part and the stiffening profile to the form, while the mounting 9 is simultaneously fixed via the tensioning element and the connection of adjacent form panels is consequently effected.

Further advantageous possibilities of application are opened up due to the device according to the invention, whereby in an advantageous way weakenings of the stiffening profiles due to corresponding deformation or even perforations, slots or the like can be avoided and yet a favourable introduction of force at any points whatever of the form panels, especially in the region, particularly favourable therefor, of the occurrence of additional stiffening struts, can be effected, in order to connect to one another and align in a longitudinal direction the form panels.

For the stability and rigidity of the form panels especially in their marginal region it is advantageous that the webs constituting the stiffening profile 5, 53 and 61 and especially the web 5a perpendicular to the rear side of the form skin 6 are straight in cross section.

The device 1 according to the invention can, nevertheless, engage on the stiffening profiles.

Claims (42)

1. Device for the connection of form elements such as form panels, which have at their margins U-shaped stiffening profiles which are open outwardly in a direction parallel to the form skin, hence directed in use with the openings respectively towards the corresponding opening on the adjacent form element, and whose outer legs remote from the form skin have a margin extending at least in regions towards the form skin and have a smaller height than the inner legs, the device comprising a mounting adapted to grip behind said margins, the thickness of the mounting being equal to or less than the clear spacing between the outer U-legs of two adjacent stiffening profiles lying against one another, whereby the mounting is introducible on edge between the U-legs and is brought into the functional position by rotation about an axis extending approximately perpendicularly to the form skin and at least one tensioning element engaging in the region of said mounting lying between the margins in use and having an abutment adapted to be supported on the outside of the form elements.

2. Device according to claim 1, wherein the mounting has two projections which grip behind the margins and engage on the inclined faces thereof in use and which lie in the functional position, that is after the tightening of the tensioning element, with their end faces simultaneously against the inside of the outer U-legs.

3. Device according to claim 2 wherein in order to form the two projections gripping behind the margins, the mounting has open ended slots, remote from the form skin, for the entry of the margins and at least the edges, respectively gripping behind a margin, of the slots of the mounting extends diagonally in relation to the centre axis of the mounting, whereby the orientation of this inclination corresponds at least approximately in the functional position to the inclination of the margin.

4. Device according to claim 3, wherein the slot narrows towards its closed end, the edge of the slot situated on the outside of the margin in use extends preferably parallel to the centre axis of the mounting, and the margin engages, preferably is clamped, on both sides in the functional position at least at its free edge in the slot.

5. Device according to one of claims 1 to 4, wherein the abutment on the tensioning element comprises a bracket which is displaceable in relation to the tensioning element and is pressable against the outside of the form panel and which has for simultaneous alignment of the form panels bearing faces aligned with one another for bearing on the adjacent form panels, the bracket has a length exceeding or overlapping the width of stiffening profiles lying against one another, the bearing faces are provided at least at its ends for pressing against the outside of the form, the abutment bracket has additional bearing faces in the region of the mounting which lie in the functional position on the outsides of the outer legs of the stiffening profiles.

6. Device according to any of claims 1 to 5, wherein the tensioning element comprises a threaded member and is connected to the mounting in a tension-proof way.

7. Device according to claim 6, wherein clamping parts provided with inclined faces are provided for the fixing of the abutment upon the bracing of the form in a longitudinal direction relative to the threaded member.

8. Device according to claim 7, wherein the clamping part comprises a nut interacting with the threaded member and engaging over the bracket on its outside or in a perforation.

9. Device according to claim 7, wherein the clamping part comprises a wedge passing through or gripping behind the threaded member and/or the bracket, a slot being provided for the wedge at least in the threaded member and optionally also in the bracket and the wedge simultaneously forms a lock against turning for the bracket.

1 0. Device according to any of claims 1 to 9, wherein the tensioning element has at least in regions a contour diverging from a circular cross section and the recess, engaging over this region, of the bracket has a corresponding inner shape to act as a lock against turning between the tensioning element and the bracket.

11. Device according to any of claims 6 to 10, wherein the threaded member engaging on the mounting has a circular cross section over a major portion of its length.

1 2. Device according to claim 11, wherein at least the initial region, fastened to the mounting of the threaded member is polygonal and especially an outwardly leading thread region for a clamping nut is provided on the polygon.

1 3. Device according to any of the preceding claims, wherein a compensating form element and/or the monting on the side lying opposite the end faces of the projections of the mounting and the width of the mounting or of the mounting region is enlarged preferably by the width of the compensating element.

14. Device according to claim 13, wherein the compensating element comprises a U-shaped profile whose U-legs lie with their margins on the mounting and are preferably fastened, especially welded thereto.

1 5. Device according to any of the preceding claims, wherein a transverse spar on which a mounting part is mounted displaceably parallel to the form skin is provided on the region of the tensioning element lying on the inside of the stiffening profiles in the functional position, a compensating element such as a sheet-metal panel is arranged at the end of the tensioning element, engaging over the form skin of the adjoining form panels in use, the transverse spar has a polygonal, especially square cross section and in that the mounting parts have a sleeve or suchlike guide which extends parallel to the form skin and whose inner contour corresponds to the outer contour of the transverse spar.

1 6. Device according to any of claims 5 to 15 wherein the bearing face of the bracket extends over its entire length.

1 7. Device according to any of claims 5 to 16, wherein the bracket allows for the passage of a plurality of parallel tensioning elements or form tie bars and/or has a slot directed in its longitudinal direction for the engagement, offset in relation to its centre, of a tensioning element or of a form tie bar.

1 8. Device according to any of claims 5 to 17, wherein the bracket has at least two tensioning elements passing through it, each with a mounting, whereby at least the slots, remote from one another, of the mountings accommodate respectively in use a margin of a stiffening profile of a form panel.

1 9. Device according to claim 18, further comprising a compensating panel which is fixable to the abutment bracket on the sides of the mountings adjacent one another or by means of a tensioning element.

20. Device according to any one of the preceding claims, further comprising an angle piece having two legs to act as an abutment, wherein at least one mounting is arranged on each leg on its side adjacent the face to be concreted.

21. Device according to claim 20, wherein the legs of the angle piece are connected rigidly, preferably at a right angle.

22. Device according to claim 20, wherein in the legs of the angle piece are adjustable and optionally fixable in their angle relative to one another.

23. Device according to any of claims 20 to 22, wherein the mounting has in the region of the inner corner an internally threaded sleeve, such as a welded-on nut, into which there engages from outside as tensioning element a threaded rod which is mounted rotatably, but fixedly in a longitudinal direction.

24. Device according to claim 23, wherein there are provided on the side, remote from the form skin of the angle legs of the angle piece provided at the inner corner grips or suchlike engagement means which are connected fixedly against rotation to the: threaded rod passing through the angle piece and which have a turning part with a peripheral groove into which there engages at least one projection connected fixedly to the angle piece.

25. Device according to any of claims 20 to 24, wherein the mounting is locked against turning in the region of the corner connection, in that two flat bars forming the mounting, corresponding to one another and having mounting slots are fastened to the internally threaded sleeve through which the turnable threaded rod passes and the threaded rod engages preferably symmetrically between these two flat bars. or the like forming the mounting to lock the mounting against turning there is provided at least one pin or the like projecting on it and engaging into a recess of an adjacent profile, the locking pin engages into the corner stiffening profile belonging to the inner corner and there especially into a slot direced perpendiclarly to the face to be concreted and/or there is provided as lock against turning on the side, adjacent the mounting, especially of the corner stiffening profile a projection which engages preferably with a little play into the gap between the two parts accommodating between them the nut or suchlike threaded sleeve and forming the mounting.

26. Device according to any of claims 5 to 25, wherein the bracket is turnable in relation to the mounting and is optionally fixable.

27. Devices for the connection of form elements substantially as herein described with reference to the accompanying drawings.

28. Formwork comprising at least two form elements which have at their margins Ushaped stiffening profiles which are open outwardly in a direction parallel to the form skin and whose outer legs remote from the form skin have a margin extending at least in regions towards the form skin and have a smaller height than the inner legs, and at least one device according to any preceding claim, the mounting being adapted to grip behind said margins.

29. Formwork according to claim 28, wherein the margin extends diagonally towards the face to be concreted and towards the adjacent profile of the adjacent form panel.

30. Forwork according to claim 28 or 29, wherein the margin is straight, starting from a bending edge or is planar at least on its inner inclined face.

31. Formwork according to any of claims 28 to 30, when directly or indirectly appendant to claim 5, wherein stiffening struts are provided on the form elements which are connected flush with the stiffening profiles and have the same height and the bearing faces of the abutment bracket are all aligned with one another.

32. Formwork according to any of claims 28 to 31, when directly or indirectly appendant to claim 5, wherein stiffening struts are provided on the form elements which are offset vertically in relation to the stiffening profiles, and the bearing faces of the abutment bracket are offset and/or adaptable, preferably adjustable, by a corresponding amount.

33. Formwork according to any of claims 28 to 32, when directly or indirectly appendant to claim 6, wherein the length of the region surmounting the abutment bracket of the tensioning element carrying the mounting is preferably larger than the thickness of a square timber or suchlike additional part to be fixed on the outside of the form.

34. Formwork according to any of claims 28 to 33, when directly or indirectly appendant to claim 20, wherein there are supported in the joint region of the form panels, at an angle to one another, of an outer corner corner stiffening profiles which are provided for engagement on the diagonally adjacent mountings and which extend over the entire form height and are connected to one another on their side remote from the form skin.

35. Device according to claim 34, wherein the corner stiffening profiles of the outer corner form approximately the shape of a Y in cross section, whereby the outer free margins have respectively legs with bends corresponding to the outer U-legs of the stiffening profiles and these legs stand at the angle of the corner to one another.

36. Device according to claim 34 or 35, wherein the corner stiffening profiles are bent in the joint region approximately to the height of the inner legs on the outside of the form skin and the inner ends of these bends meet one another preferably at right angles on the end sides of the form panels standing at an angle to one another.

37. Formwork according to and of claims 28 to 33, when directly or indirectly appendant to claim 20, wherein stiffening profiles are connected to the inner corner which correspond to the stiffening profiles of the form panels and to whose ends adjacent the form the form skin of the inner corner is connected.

38. Formwork according to claim 37, wherein a passage for the tensioning element of the monting of the one angle leg is offset vertically in relation to a passage on the other angle leg.

39. Device according to claim 38, wherein there is provided on the angle piece of the inner corner additionally an engagement for a form tie bar which is offset vertically in relation to the passages for the mountings.

40. Device according to claim 38 or 39, wherein the engagement points of the form tie bars are arranged vertically in the centre between the vertically offset passages for the tensioning elements of the mountings.

41. Device according to any of claims 38 to 40, wherein there are provided as engagement for the form tie bars internally threaded members which engage on the sides of the angle piece remote from the form and whose internal thread corresponds preferably to the external thread of the form tie bars and the threaded member is fastened fixedly against rotation to the angle piece.

42. Formwork according to claim 41, wherein the angle piece has in the region of the form tie bar a marginally open slot with a width corresponding preferably approximately to the diameter of the form tie bar for lateral introduction of the form tie bar.