EP3228777B1 - Supporting head for connecting to an end of a supporting element for a formwork beam - Google Patents

Description

The invention relates to a holding head according to the preamble of claim 1.

The invention further relates to a support according to the preamble of claim 7.

Finally, the invention relates to a formwork construction according to the preamble of claim 8.

the EP 1 482 105 A1 discloses a crosshead with a base plate from which two long stanchions and two short stanchions protrude. In addition, a locking pin is provided which is held captive in an opening in the base plate, but which can be displaced in the vertical direction in the opening. The locking pin is used to secure the cross head on a head plate, which is provided on a tubular body of a support. For this purpose, the cross head is rotated during assembly against the head plate or the support, whereby openings in the cross head are brought into congruence with openings in the head plate of the support. As a result, the locking pins are lowered so that the locking pins protrude into the openings in the top plate. In the secured state, the locking pin is completely lowered under the top of the base plate.

From the DE 196 05 824 a generic head connection for a pipe support is known. The head connection has a base plate on which two retaining tabs are attached. The strap of a formwork support can be held by the retaining tabs. It is attached to the formwork beam in such a way that the strap of the formwork beam is inserted between the two retaining straps. The head connection is then rotated in such a way that the belt is located between the base plate and the retaining tabs. In this way it can be prevented that the formwork support is lifted off the head connection during use. The disadvantage of the prior art, however, is that the mounting of the formwork support at the head connection can be weakened or even loosened, in particular due to vibrations.

In the EP 1 498 557 A1 a different type of crosshead becomes one Girder slab formwork described. The cross head has a base plate from which four elongated, straight stanchions protrude. A formwork support can be arranged between the stanchions. The arrangement of two stanchions on each longitudinal side of the cross head not only prevents the formwork beam from tilting about its longitudinal axis, but also prevents the formwork beam from rotating relative to the base plate. At the outer ends of the stanchions, nail holes are also provided, by means of which the formwork support can be fixed to the crosshead in the vertical direction. This prior art has the particular disadvantage that securing the formwork support by means of the nail holes is comparatively cumbersome. In addition, handling is made more difficult because the formwork support has to be positioned between the four stanchions.

The object of the present invention is to eliminate or alleviate at least individual disadvantages of the prior art. The invention therefore sets itself the goal of creating a retaining head, a support equipped therewith and a formwork structure in such a way that the formwork support can be quickly and reliably secured to the retaining head with structurally simple means.

This object is achieved by a formwork support with the features of claim 1, a support with the features of claim 7 and by a formwork construction with the features of claim 8. Preferred embodiments are given in the dependent claims.

According to the invention, the holding head has at least one anti-rotation element which, in the holding position, counteracts a rotation of the holding head in the direction of the release position.

The holding head according to the invention has one hook element per longitudinal side of the holding head, so that in the holding position a strap element of the formwork support is encompassed by the hook elements, but in the released position rotated relative to it by the hook elements is resolved. As a result, the formwork carrier is secured in the holding position on the one hand against tilting of the formwork carrier about its longitudinal direction. On the other hand, the hook elements prevent the formwork carrier from being lifted off the holding head in the direction perpendicular to its base element. Because of the hook elements, nail holes for driving nails into the formwork support can advantageously be dispensed with. When the formwork support is attached to the support head, the formwork support is first positioned on the base element of the support head in a position that is rotated relative to the support head. Thereafter, the formwork carrier can be rotated relative to the holding head (or vice versa) in such a way that the hook elements in the holding position encompass the opposite longitudinal edges of the belt element of the formwork carrier. As a result, the formwork support is secured against both tilting and lifting off the holding head. In addition, an anti-rotation element is provided, with which an undesired rotation of the formwork carrier with respect to an axis running essentially perpendicular to the main plane of the base element of the holding head (ie with respect to the operating position around an especially essentially vertical axis) is at least made more difficult. The arrangement of the anti-rotation element causes a holding torque in the holding position, which counteracts a rotation of the formwork carrier relative to the holding head from the holding position in the direction of the release position. Advantageously, this can prevent vibrations or other environmental influences on the construction site from loosening or even loosening the fixation of the formwork carrier on the holding head. The hook elements in connection with the anti-rotation element can advantageously maintain the simple assembly of the retaining head by rotating it relative to the formwork carrier, with anti-rotation being also achieved in the retaining position.

In order to reliably secure the formwork support with structurally simple means against unwanted rotation from the holding position in the direction of the release position, it is advantageous if the anti-rotation element has an elevation protruding from the floor element with a smaller extension perpendicular to the floor element than the hook elements. The elevation of the anti-rotation element creates a non-positive and / or form-locking connection between the anti-rotation element and the formwork carrier in the holding position. To release the formwork carrier, the connection between the anti-rotation element and the formwork carrier is released.

If the anti-rotation element is arranged essentially symmetrically with respect to a center plane of the holding head running perpendicular to the base element, the unwanted rotation of the formwork carrier from the holding position to the release position can be prevented particularly reliably.

In order to apply a holding torque that fixes the formwork carrier in the holding position, it is advantageous if the anti-rotation element has an elastically deformable spring element.

A snap or latching connection is preferably provided between the spring element and a recess in the formwork support. The spring element can be elastically deformed when the formwork carrier is transferred from the release position to the holding position. When the holding position is reached, the spring element snaps into the recess of the formwork support due to its inherent elasticity. Thus, in this embodiment, a positive connection is provided between the anti-rotation element and the formwork carrier in the holding position. By rotating the formwork carrier relative to the holding head, the anti-rotation element is elastically deformed, whereby the anti-rotation element can be brought out of engagement with the recess of the formwork carrier.

In an alternative embodiment, the formwork carrier has an essentially flat outer surface which is free of a recess for latching the anti-rotation element. In this embodiment, the spring element is in the holding position in an elastically deformed state, so that the spring element bears against the outer surface of the formwork support. Thus, the rotation lock in this embodiment is particularly Achieved via a frictional connection between the spring element and the anti-rotation element. Depending on the material of the formwork carrier, the spring element can also cause deformation of the formwork carrier in the holding position, which also counteracts the rotation of the formwork carrier from the holding position towards the release position.

According to a particularly preferred embodiment, the elastically deformable spring element has a fastening section fastened to the floor element and a spring section protruding therefrom, the fastening section preferably being arranged in a recess in the floor element. The fastening section and the spring section are preferably formed in one piece. In a particularly simple embodiment, the fastening section and the spring section are formed from an elongated sheet. The spring section is elastically deformable perpendicular to the plane of the sheet. In order to facilitate the attachment of the formwork carrier to the holding head, the fastening section is preferably arranged completely within a recess in the floor element so that the fastening section does not protrude beyond the adjoining sections of the floor element on which the formwork carrier is placed.

Depending on the design, the preferably leaf-shaped spring element can in particular be made of a metal or a plastic.

According to a further preferred embodiment, the anti-rotation element has at least one pressure body, preferably in the form of a ball, and a bearing spring, the pressure body being mounted displaceably against the force of the bearing spring, preferably in a direction essentially perpendicular to the main plane of the base element. In this embodiment, a substantially rigid pressure body, in particular made of metal, is provided, which is displaceable against the force of the bearing spring. When the formwork support is attached, the pressure body is pressed downwards by the formwork support, a spring force counteracting the displacement being built up in the bearing spring. In a preferred embodiment, the pressure body is locked in the holding position with a recess in the formwork support, the bearing spring being in a relaxed state. In a further preferred embodiment, the pressure body bears in the holding position against the outer surface of the formwork support, the bearing spring being present in the tensioned state.

According to a particularly preferred embodiment of the formwork support, a second reinforcing element extending in the longitudinal direction of the second chord element is arranged in a corresponding recess of the second chord element, with a first reinforcing element extending in the longitudinal direction of the first chord element preferably being arranged in a corresponding recess of the first chord element, the second Reinforcing element has at least one holding opening which extends essentially in the longitudinal direction of the second belt element and which is designed for a connection, in particular a snap connection, to the anti-rotation element of the holding head.

In this embodiment, the holding opening in the second reinforcing element of the formwork support can therefore be used to accommodate the anti-rotation element in the holding position. A positive connection between the anti-rotation element and the second reinforcing element of the formwork support is therefore advantageously provided in the holding position. According to a particularly preferred embodiment, the anti-rotation element is set up for a snap or latching connection with the second reinforcing element of the formwork support. By rotating the formwork carrier relative to the holding head, the anti-rotation element is brought into engagement with the holding opening of the formwork carrier. To release the formwork carrier, the engagement between the anti-rotation element and the second reinforcement element of the formwork carrier is released. For this purpose, the anti-rotation element, as described above, has a spring element which is in the release position due to the support of the formwork support in an elastically deformed state and in the holding position in a state snapped to the holding opening of the formwork support. Alternatively The anti-rotation element, as also already described above, can have a pressure body which is mounted displaceably against spring force and which, in the holding position, engages in the holding opening of the formwork support.

The connection between the anti-rotation element and the second reinforcing element of the formwork support can be established particularly easily if the retaining opening of the second reinforcing element extends in the plane of an outer surface of the second belt element facing away from the first belt element, preferably essentially centrally between the longitudinal edges of the second belt element.

The first and the second reinforcing element can be designed accordingly. Therefore, if features and properties of the first reinforcement element are described for the purposes of this disclosure, these can equally be implemented in the first and / or in the second reinforcement element.

To reinforce or stiffen the first belt element provided therewith, the first reinforcement element is formed from a material different from the first belt element. The first and the second belt element are made in particular from a wood material, preferably softwood. The first reinforcement element (and correspondingly the second reinforcement element) is preferably formed from a metal, for example aluminum, a plastic, or a fiber-reinforced plastic. However, the first reinforcing element can alternatively also be made of a wood material different from the wood material of the first belt element, which is more resilient than the wood material of the first belt element, in particular in the direction perpendicular to the outer surface of the first belt element. For this purpose, the wood material of the first reinforcement element can have layers of wood arranged perpendicular to the outer surface of the first belt element, ie in the direction of loading. In particular, the wood material of the first reinforcement element can be plywood or laminated veneer lumber be, wherein several layers or plies of the plywood or the laminated veneer lumber are parallel to the main plane of the web element, ie in the direction of loading, are extended.

The first reinforcing element preferably extends essentially centrally between the longitudinal edges of the first belt element.

In order to reinforce the formwork support over its longitudinal extent, it is provided according to a first preferred embodiment that the first reinforcement element extends essentially over the entire length of the first chord element. As a result, the holding head can be attached to any position in the longitudinal direction of the formwork carrier and / or moved along the reinforcing element for the state of use.

Alternatively, a plurality of first reinforcing elements can be spaced apart from one another in the longitudinal direction of the first belt element. In this embodiment, instead of a continuous reinforcing element in the first and second chord element, individual first and second reinforcing elements are provided, with sections of the formwork beam free from first and second reinforcing elements extending therebetween.

• Fig. 1 eine schaubildliche Ansicht einer erfindungsgemäßen Schalungskonstruktion mit mehreren Schalungsträgern in Form von Jochträgern und Querträgern, wobei die Jochträger auf Halteköpfen von Stützen aufgelagert sind;
• Fig. 2 eine perspektivische Ansicht des erfindungsgemäßen Haltekopfs gemäß Fig. 1;
• Fig. 3 eine Schnittansicht des Verbindungsbereichs zwischen dem Schalungsträger und der Stütze;
• Fig. 4 und 5 weitere Ansichten des in Fig. 1 bis 3 dargestellten Haltekopfs;
• Fig. 6 eine perspektivische Ansicht einer weiteren erfindungsgemäßen Ausführungsform des Haltekopfs;
• Fig. 7 eine perspektivische Ansicht einer weiteren erfindungsgemäßen Ausführungsform des Haltekopfs; und
• Fig. 8 und Fig. 9 perspektivische Ansichten zur Veranschaulichung der Anbringung des Schalungsträgers an dem Haltekopf der Stütze.

The invention is explained further below with reference to preferred exemplary embodiments to which, however, it is not intended to be restricted. In the drawing shows:

• Fig. 1 a diagrammatic view of a formwork construction according to the invention with several formwork girders in the form of main girders and cross girders, the main girders being supported on holding heads of supports;
• Fig. 2 a perspective view of the holding head according to the invention according to Fig. 1 ;
• Fig. 3 a sectional view of the connection area between the formwork support and the support;
• Figures 4 and 5 further views of the in Figs. 1 to 3 holding head shown;
• Fig. 6 a perspective view of a further embodiment of the invention of the holding head;
• Fig. 7 a perspective view of a further embodiment of the invention of the holding head; and
• Fig. 8 and Fig. 9 perspective views to illustrate the attachment of the formwork support to the holding head of the support.

In Fig. 1 a formwork structure 1 is shown, which is set up in the embodiment shown for the production of a ceiling. The formwork structure 1 has several supports with support elements 2, which are supported on the ground. Similar formwork supports 3a are supported on the support elements 2, on which further formwork supports 3b are supported. The further formwork supports 3b run transversely to the formwork supports 3a. In the embodiment shown, the further formwork supports 3b are arranged essentially perpendicular to the formwork supports 3a. The formwork girders 3a on the support elements 2 are referred to as main beams, the transverse formwork girders 3b as transverse girders. Formwork panels 4 are arranged on the upper side of the formwork girders 3b forming the transverse girders. The formwork structure 1 is known per se from the prior art, so that more detailed explanations are not necessary. In the installed state, the formwork supports 3a, 3b are perpendicular to its (in Fig. 1 drawn) longitudinal direction 5 loaded.

How out Fig. 3 As can be seen, each formwork carrier 3a has a first belt element 6, which extends in the longitudinal direction 5 and consists of a wood material, and a second belt element 7, which extends in the longitudinal direction 5, consists of a wood material. The first belt element 6 and the second belt element 7 are via a In the longitudinal direction 5 extending web element 8 connected to one another, which is formed from a further wood material. The web element 8 is plate-shaped, the main plane of the web element 8 being essentially perpendicular to the main plane of the first 6 or second chord element 7. In the case of the ceiling formwork shown, the web element 8 is therefore oriented vertically in the installed state. The first 6 and second belt element 7 have a greater width, ie extension perpendicular to the main plane of the web element 8, than the web element 8. Accordingly, the formwork supports 3, as is customary in the prior art, are I-shaped. The first belt element 6 is made from a first wood material, the second belt element 7 from a second wood material. The first 6 and the second belt element 7 are preferably made from the same wood material, in particular softwood.

The further formwork carrier 3b is constructed in accordance with the formwork carrier 3a with a first belt element 6, a second belt element 7 and a web element 8 connecting the first belt element 6 to the second belt element 7. Accordingly, explanations relating to the structure of the formwork support 3a relate equally to the further formwork support 3b, unless differences are specifically pointed out.

As in Fig. 3 As illustrated schematically, the web element 8 has on one longitudinal side at least one first projection or prong 9 which engages in a corresponding recess in the first belt element 6. In addition, the web element 8 has at least one corresponding second projection or prong 10 on the other (opposite) longitudinal side, which engages in a corresponding recess in the second belt element 7. In the embodiment shown, two first projections 9 and two second projections 10 are provided. The first 9 and second projections 10 ensure that the web element 8 is securely anchored in the first 6 and second chord element 7. The first 9 and second projections 10 extend in the form of a web in the longitudinal direction 5 of the formwork carrier 3. In the embodiment shown, the first 9 and second protrusions 10 are wedge-shaped tapers towards the free end.

How out Fig. 1 , 3 Furthermore, it can be seen that the formwork support 3 also has at least one first reinforcing element 11 which extends in the longitudinal direction 5 of the first belt element 6 and which is arranged in a correspondingly shaped recess 12 in the first belt element 6. The first reinforcing element 11 extends between the outer surface 6 'of the first belt element 6 facing away from the second belt element 7 and the first projection 9 of the web element 9 the outer surface 6 ′ of the first belt element 6 is brought about via the first reinforcing element 11 into the web element 8.

How out Fig. 1 , 3 Furthermore, it can be seen that the formwork support 3a also has at least one second reinforcement element 13 which extends in the longitudinal direction 5 of the second belt element 7 and which is arranged in a corresponding recess 14 of the second belt element 7. The second reinforcing element 13 extends between the second projection 10 of the web element 8 and the outer surface 7 'of the second belt element 7 facing away from the first belt element 6, so that the second reinforcing element 13 contacts the second projection 10 of the web element 8 on one longitudinal side and on the other longitudinal side on the outer surface 7 'of the second belt element 7 is exposed.

How out Fig. 1 As can be seen, the further formwork support 3b or cross member in the embodiment shown also has a first reinforcement element 11 and a second reinforcement element 13. Depending on the design, however, at least individual additional formwork supports 3b can be designed without first or second reinforcing elements 11, 13.

How out Fig. 3 As can be seen, hollow profile elements 17 of the same type are provided as first 11 and second reinforcing element 13 in the embodiment shown. The hollow profile element on the first chord element 6 has one on the first projection 9 of the Web elements 8 abutting bottom wall 18 and upstanding side walls 19 therefrom, which in the embodiment shown diverge in the direction of the outer surface 6 '. In addition, the hollow profile element 17 has flanges 20 extending essentially in the plane of the outer surface 6 ′ of the first belt element 6. The flanges 20 delimit at least one holding opening 21 which extends in the longitudinal direction 5 of the formwork support 3a. The hollow profile element 17 on the second belt element 7 is constructed accordingly. The holding openings 21 of the hollow profile elements 17 extend in the longitudinal direction 5 of the formwork support 3 in the plane of the outer surface 6 ′ of the first chord element 6 or in the plane of the outer surface 7 ′ of the second chord element 7.

In the embodiment shown, the hollow profile element 17 has a smaller width on the side of the bottom wall 18 than on the side of the flanges 20. As a result, the hollow profile elements 17 are in full contact with the first 9 or second projections 10 of the web element 8. In addition, the hollow profile elements 17 have an intermediate web 26 between the bottom wall 18 and the flanges 20 which extends essentially parallel to the bottom wall 18.

How out Fig. 1 , 3 As can be seen, the supports at the free (upper) end have a holding head 27 for holding the second belt element 7 of the formwork support 3a. The holding head 27 has a plate-shaped base element 28 (see Fig. Fig. 2 , Fig. 4 ) for supporting the outer surface 7 ′ of the second belt element 7 of the formwork carrier 3 facing away from the first belt element 6. In addition, the holding head 27 has exactly one hook element 29 on each longitudinal side 30 of the base element 28. The hook elements 29 are essentially immovably or firmly connected to the base element 28. In the embodiment shown, the hook elements 29 are angled from the longitudinal edges of the floor element 28. The hook elements 29 each have two sections 29a, 29b which are arranged at an angle of preferably essentially 90 ° to one another (cf. Fig. 5 ). In the embodiment shown, the sections 29a of the hook elements 29 are essentially perpendicular to the main plane of the base element 28. the Sections 29b of the hook elements 29 extend essentially parallel to the main plane of the floor element 28, the sections 29b projecting inward from the ends of the sections 29a facing away from the floor element 28. The hook element 29 is on one longitudinal side of the base element 28, based on the longitudinal direction 31 of the holding head 27 (cf. Fig. 2 ), arranged at a distance from the hook element 29 on the other longitudinal side 30 of the base element 28. Accordingly, the hook elements 29 are arranged diagonally opposite one another on the base element 28. In the state of use, the holding head 27 is between a release position (cf. Fig. 8 ) and a stop position (cf. Fig. 9 ) rotatable relative to the formwork support 3a about an axis of rotation running essentially perpendicular to the main plane of the base element 28. In the release position, the longitudinal direction 31 of the holding head 27 is arranged at an angle to the longitudinal direction 5 of the formwork carrier 3a, so that the engagement between the hook elements 29 and the second strap element 7 of the formwork carrier 3a is released. In the holding position, the longitudinal direction 31 of the holding head 27 is arranged essentially parallel to the longitudinal direction 5 of the formwork carrier 3a, so that the sections 29b of the hook elements 29 are placed against the outer surfaces 7 ″ of the second belt element 7 of the formwork carrier 3a facing the first belt element 6 the formwork support 3a is secured in the holding position against lifting off the floor element 28 in the direction perpendicular to the main plane of the floor element 28.

How out Fig. 2 , 3 Furthermore, it can be seen that the holding head 27 has a holding element 32 for fixing on the support element 2, which is mounted so as to be pivotable about bearing points 33. The holding element 32 has an elastically deformable bracket 34, the free ends of which can be brought into engagement with corresponding latching recesses 35 of the holding head 27. The support has a holding plate 35, preferably detachably connected to the support element 2, with a central opening into which a centering extension 36 (cf. Fig. 4 ) of the holding head 27 is inserted. To mount the holding head 27 on the support, the holding plate 35 is first connected to the support element 2. Thereafter, the bracket 34 of the holding element is folded outwards (not shown). As a result, the holding head 27 can be placed on the holding plate 35 via the centering extension 36. The bracket 34 is then brought into the position of engagement with the latching recesses 35, the bracket 34 being placed against the outside of the holding plate 35 facing away from the base element 28. As a result, the holding head 27 is secured against being pulled off the holding plate 35 on the support element 2.

How out Fig. 2 , 3 Furthermore, it can be seen that the holding head 27 has at least one anti-rotation element 37, which makes it difficult or prevents an undesired rotation of the holding head 27 from the holding position in the direction of the release position.

In the embodiment of Figures 2 to 5 the anti-rotation element 37 has an elevation 38 protruding from the base element 28, the height of which (ie its extension perpendicular to the base element 28) is many times less than the height of the hook elements 29. In the embodiment shown, the anti-rotation element 37 is arranged essentially centrally on the base element 28 of the holding head 27.

According to Figures 2 to 5 the anti-rotation element 37 has an elastically deformable spring element 39 to form the elevation 38. The elastically deformable spring element 39 has a fastening section 40 fastened to the base element 28 and a spring section 41 protruding upward therefrom. In the embodiment shown, the fastening section 40 is arranged completely in a recess 42 of the floor element 28. The fastening section 40 can be fastened to the upper side of the floor element 28 in any desired manner. In Fig. 2 a screw connection 43 is indicated. In the embodiment shown, the spring element 39 is arranged with a play 44 in the recess 42, so that an end region of the spring element 39 opposite the fastening section 40 can be displaced in the recess 42 when the spring section 41 is elastically deformed.

The embodiment of the Fig. 6 only differs thereby from that of Fig. 2 that two anti-rotation elements 37 are provided, which are spaced apart from one another in the longitudinal direction 31 of the holding head 27.

In the embodiment of Fig. 7 the anti-tilt element 37 has at least one pressure body 45 which, in the embodiment shown, is a ball. The pressure body 45 is mounted displaceably against the force of a bearing spring (not shown) in a direction essentially perpendicular to the main plane of the base element 28.

The above-described embodiments of anti-rotation elements can in principle be used with various types of formwork supports. However, a use for the in Fig. 1 Shutter support 3a shown, the retaining opening 21 of the second reinforcing element 13 on the second belt element 7 of the formwork support 3a being used for locking with the anti-rotation element 37 of the retaining head 27.

How out Fig. 3 As can be seen, the elevation 38 of the anti-rotation element 27 protrudes in the holding position at least partially into the holding opening 21 of the second reinforcing element 13, whereby a form-fitting connection is achieved. In the embodiment shown, the spring section 41 of the anti-rotation element 37 is compressed by the flange 20 of the second reinforcing element when the formwork support 3a is rotated relative to the holding head 27. In order to transfer the formwork carrier 3a into the release position, a holding torque must therefore be overcome so that the formwork carrier 3a is secured against undesired rotations, for example due to vibrations, in the holding position.

Claims (10)

1. Retaining head (27) for connection to one end of a prop element (2) for a formwork support (3a), the head comprising a base element (28) for contact with an outer surface (7") of the formwork support (3a), and comprising, on each long side of the base element (28), a hook element (29) for hooking onto the formwork support (3a), the hook element (29) on one long side of the base element (28) being arranged, in the longitudinal direction (31) of the retaining head (27), at a distance from the hook element (29) on the other long side of the base element (28) in order to be arranged diagonally opposite on the base element, characterised in that the retaining head (27), during use, can be rotated relative to the formwork support (3a) between a retaining position that secures the formwork support (3a) on the hook elements (29) and a release position that releases the formwork support (3a) from the hook elements (29), and in that the retaining head (27) has at least one anti-rotation element (37) which, in the retaining position, counteracts a rotation of the retaining head (27) towards the release position.
2. Retaining head (27) according to claim 1, characterised in that the anti-rotation element (37) has an elevation (38) which protrudes from the base element (28) and has a smaller extent perpendicular to the base element (28) than the hook elements (29).
3. Retaining head (27) according to either claim 1 or claim 2, characterised in that the anti-rotation element (27) is arranged substantially symmetrically with respect to a central plane of the retaining head (27) extending perpendicularly to the base element (28).
4. Retaining head (27) according to any of claims 1 to 3, characterised in that the anti-rotation element (37) has an elastically deformable spring element (39).
5. Retaining head (27) according to claim 4, characterised in that the elastically deformable spring element (39) has a fastening portion (40) fastened to the base element (28), and a spring portion (41) projecting from said fastening portion, the fastening portion (40) preferably being arranged in a depression (42) in the base element (28).
6. Retaining head (27) according to any of claims 1 to 3, characterised in that the anti-rotation element (37) has at least one pressure body (45), preferably in the form of a ball, and a bearing spring, the pressure body (45) preferably being mounted so as to be able to slide, counter to the force of the bearing spring, in a direction substantially perpendicular to the main plane of the base element (28).
7. Prop comprising a prop element (2) and comprising a retaining head (27) at one end of the prop element (2), characterised in that the retaining head (27) is designed according to any of claims 1 to 6.
8. Formwork structure comprising a formwork support (3a) which has a first flange element (6), a second flange element (7) and a web element (8) connecting the first flange element (6) to the second flange element (7), and comprising a prop which has a prop element (2) and a retaining head (27) at one end of the prop element (2), characterised in that the prop is designed according to claim 7.
9. Formwork structure (1) according to claim 8, characterised in that a second reinforcing element (13) extending in the longitudinal direction (5) of the second flange element (7) is arranged in a corresponding recess (14) in the second flange element (7), a first reinforcing element (11) extending in the longitudinal direction of the first flange element (6) preferably being arranged in a corresponding recess (12) in the first flange element (6), the second reinforcing element (13) having at least one retaining opening (21) which extends substantially in the longitudinal direction (5) of the second flange element (7) and which is designed for a connection, in particular a snap-fit connection, with the anti-rotation element (37) of the retaining head (27).
10. Formwork structure (1) according to claim 9, characterised in that the retaining opening (21) of the second reinforcing element (13) extends, preferably substantially midway between the longitudinal edges of the second flange element (7), in the plane of an outer surface (7') of the second flange element (7), which surface faces away from the first flange element (6).

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