AU2022402329A1 - Ceiling formwork element - Google Patents

Abstract

The invention relates to a ceiling formwork element (2) for connecting to a supporting head (4) of a formwork support (3), comprising a frame (6) for a formwork board (5), and a blocking element (10) on the frame (6) for engaging under a securing protrusion (11) on the supporting head (4) of the formwork support (3), wherein the blocking element (10) is connected to a spring element (12) such that the blocking element (10) can be transferred from a blocking position into a release position against the spring force of the spring element (12).

Description

Ceiling formwork element

The invention relates to a ceiling formwork element for connecting to a supporting head of a formwork support, comprising: a frame for a formwork board, a blocking element on the frame for engaging under a securing protrusion on the supporting head of the formwork support.

Furthermore, the invention relates to a ceiling formwork, comprising: a ceiling formwork element, and a formwork support having a supporting head.

Finally, the invention relates to a method for setting up a ceiling formwork and a method for dismantling a ceiling formwork.

Various embodiments of ceiling formworks are known in the state of the art, in which ceiling formwork elements are supported on the supporting heads of formwork supports. The arrangement on the formwork supports secures the ceiling formwork element in the horizontal direction. In such ceiling formworks, it is further known that the supporting head of the formwork support comprises an undercut, which is brought into engagement with a corresponding securing means on the ceiling formwork element.

For example, DE 42 11 200 C2 shows a supporting head with hook strips, into which a corresponding hook edge on a formwork board element can be hooked in.

With the help of this securing means, the ceiling formwork element is secured in the mounted state on the supporting head of the formwork support in the vertical direction. This is referred to as liftout guard, which in particular ensures that the ceiling formwork element remains connected to the supporting head in the event of wind loads that can act on the ceiling formwork element from below. Since ceiling formwork elements are typically supported on four formwork supports at the four corners, an intermediate state can arise during the setting up of the ceiling formwork in which the ceiling formwork element rests on only three formwork heads. In this situation, too, the blocking element ensures an appropriate securing of the position in the vertical direction.

However, the known liftout guards involve considerable disadvantages. If the securing means is integrated into the supporting head, the liftout guard cannot be deactivated. Thus, it is not possible to remove a single ceiling formwork element from an array of ceiling formwork elements or to install a single ceiling formwork element in a gap of such an array of ceiling formwork elements. In general, it is necessary to pivot the ceiling formwork elements upwards into the intended position. Vertical installation or removal is not possible.

This problem can be solved in principle by using removable additional parts for the liftout guard.

An example of this is shown in DE 4308607 Al, which addresses the problem that with the state of the art of DE 42 11 200 C2, when several formwork board elements are arranged in their horizontal position, form stripping can only be started at a certain point. In contrast, DE 4308 607 Al provides wing-shaped weights that can be pivoted about a cylindrical pin, with which wing-shaped weights the retaining edge on the formwork board element can be over engaged. However, it is a drawback that the function of such wing shaped weights or counterweights can be impaired by dirt. Furthermore, this state of the art is only designed for horizontal ceiling formwork, since the wing-shaped weights always pivot into the vertical position.

In general, the known embodiments pose a risk of misuse. It can have particularly serious consequences if the liftout guard is not mounted correctly or - in the case of removable liftout guards is forgotten altogether.

Furthermore, a different solution is known from AT 409 648 B, in which a formwork carrier can be held on the supporting head by a catch spring. However, this embodiment is susceptible to dirt and damage. Moreover, the complexity and the weight of the supporting head is increased.

In this context, the object of the present invention aims to mitigate or eliminate at least individual drawbacks of the state of the art. The object of the invention is preferably to provide a liftout guard for ceiling formwork, which opens up more variable application possibilities without neglecting the safety aspects.

This object is achieved by a ceiling formwork element according to claim 1, a ceiling formwork according to claim 16, a method for setting up a ceiling formwork according to claim 21, and a method for dismantling a ceiling formwork according to claim 24.

In the ceiling formwork element according to the invention the blocking element is connected to a spring element, so that the blocking element is transferable from a blocking position into a release position against the spring force of the spring element.

The ceiling formwork according to the invention comprises a ceiling formwork element and a formwork support having a supporting head. The supporting head comprises a securing protrusion, wherein the blocking element engages under the securing protrusion of the supporting head in the blocking position.

In the blocking position, the blocking element on the frame of the ceiling formwork element is configured to engage under the securing protrusion on the supporting head. This means that the blocking element is arranged under the securing protrusion on the supporting head in such a way that the ceiling formwork element is blocked from being lifted vertically upwards. As in the state of the art, the blocking element in the blocking position effects a liftout guard, which prevents the ceiling formwork element from lifting off from the supporting head, in particular due to wind loads from below. According to the invention, the blocking element can be elastically deflected against the spring force of the spring element in order to move the blocking element from the blocking position under the securing protrusion into the release position laterally next to the securing protrusion. Thus, the blocking element can be deactivated by overcoming the spring force of the spring element, in order to enable, for example, a vertical lowering of the ceiling formwork element onto the supporting head or a vertical lifting of the ceiling formwork element from the supporting head. Due to the elastic restoring forces of the spring element, the blocking element returns to the initial position in the unloaded state, which corresponds to the blocking position in the mounted state of the ceiling formwork element on the formwork support. The blocking element is thus biased in the direction of the blocking position with the aid of the spring element. This reduces misuse. Furthermore, it is avoided that the blocking element unintentionally remains in the release position. Advantageously, the application possibilities of the ceiling formwork element can thus be extended without impairing safety. Furthermore, the embodiment according to the invention is less susceptible to damage or dirt.

For the purposes of this disclosure, the location and direction indications, such as "top", "bottom", "vertical", "horizontal", refer to an intended use of the ceiling formwork, wherein the formwork support is placed in vertical alignment on a horizontal ground and the ceiling formwork element is arranged horizontally in the concreting position. Of course, the ceiling formwork can also be used to produce inclined ceilings, in which case the location and direction indications must then be transferred accordingly.

In order to achieve lateral movability of the blocking element between the blocking position and the release position, it is favourable if the blocking element is pivotable from the blocking position into the release position about a preferably substantially horizontal pivot axis. The blocking element can thus be pivoted out of the blocking position under the securing protrusion on the supporting head against the spring force, so that, for example, a lifting of the ceiling formwork element is enabled. In addition, in the release position, the support can be removed or a ceiling formwork element can be inserted from above.

For secure and stable connection to the securing protrusion on the supporting head, it is favourable if the blocking element is provided on a lower edge region of a longitudinal or transverse side part of the frame. By arranging the blocking element on the lower edge region of the side part, it can be ensured that the blocking element is arranged in the blocking position under the securing protrusion of the supporting head, so that the intended up-lift protection, i.e. the protection against an unintentional lifting off of the ceiling formwork element from the supporting head of the formwork support, is achieved. Depending on the embodiment, the blocking element can be located on a longitudinal or on a transverse side of the frame, wherein the longitudinal side refers to the longer side of the ceiling formwork element and the transverse side refers to the narrower side of the ceiling formwork element, which is preferably rectangular in plan view in conjunction with the formwork board.

In a preferred embodiment, the blocking element in the blocking position is preferably arranged substantially completely under a retaining edge on the upper side of the frame. The retaining edge supports an edge of the formwork board on the underside and can protrude laterally outwards beyond a longitudinal or transverse side part of the frame. Due to the fact that the blocking element is covered by the retaining edge on the upper side in the blocking position, the blocking element is protected, in particular from falling objects and from getting dirty by concrete.

The retaining edge preferably comprises a drip edge on the outside on the underside, which further improves the protection of the blocking element.

If the spring element is fastened to the inner side of the side part of the frame, protection against dirt is achieved, which reduces malfunction. Advantageously, the movability of the blocking element between the blocking position (activated state) and the release position (deactivated state) can thus also be ensured under the adverse conditions typical of construction sites.

Regarding a compact, lightweight and cost-effective construction, a flat spring may be provided as the spring element, which is connected at one end to the frame and at the other end to the blocking element. A spring plate, for example, may be provided as a flat spring. The flat spring is preferably connected to the frame via a permanent connection, in particular a rivet connection. Preferably, the flat spring is arranged in the blocking position of the blocking element substantially parallel to a side part of the frame. This results in a particularly space-saving and protected arrangement. It is particularly favourable if the flat spring does not protrude inwards beyond a lower edge of the frame in the blocking position.

In another embodiment, a spring clip is provided as the spring element, which may be bent from a round wire, for example.

In a first preferred embodiment the blocking element protrudes outwards from the side part of the frame in the blocking position, in particular substantially in the longitudinal or transverse direction of the frame. Thus, the blocking element in the blocking position projects laterally from the outside of the frame, as a result of which the blocking element in the blocking position is arranged under the securing protrusion on the supporting head.

In order, on the one hand, to protect the spring element in the interior of the frame and, on the other hand, to enable the engagement under the securing protrusion outside the frame, the side part of the frame preferably comprises a passage opening, through which the blocking element protrudes outwards in the blocking position. Preferably, the passage opening comprises the same cross-sectional geometry as the blocking element. If, for example, a pin with a circular cross section is provided as the blocking element, a circular passage opening may correspondingly be provided on the side part of the frame. In the blocking position, the blocking element is preferably arranged in the passage opening on the side part with a substantially precise fit, but preferably with a (slight) clearance.

Depending on the embodiment, a pin, for example, may be provided as a blocking element. The pin may comprise a circular cross section. Furthermore, the pin may be tapered forward at the free end. However, the blocking element may also have other shapes, for example, the blocking element may be implemented as a catch with a non-circular cross section, in particular with a rectangular cross section.

In a preferred embodiment, the blocking element is fixedly connected to the spring element.

In another preferred embodiment, the blocking element and the spring element are connected to one another in that the blocking element bears against the spring element, in particular against the lower end of the spring element. The blocking element can be moved from the blocking position into the release position against the spring force of the spring element. This embodiment is particularly advantageous if the side part of the frame comprises the above-described passage opening, through which the blocking element protrudes outwards in the blocking position. The separate configuration of the blocking and spring element results in the advantage that the spring force can be transmitted to the blocking element without the blocking element being bound to the movement of the spring element. The above-described flat spring, which is connected at one end to the frame and at the other end, here via the contact on the contact surfaces, to the blocking element, is preferably provided as the spring element. During the transfer from the blocking position to the release position, the flat spring is pivoted, wherein the blocking element can be displaced substantially linearly along the passage opening. Advantageously, the blocking element does not have to pivot along with the spring element, since a relative movement between the blocking element and the spring element is made possible. In the case of a fixed connection of the spring element to the blocking element, the problem could arise that the blocking element might get wedged in the passage opening when pivoting along with the spring element. This problem can be reliably avoided by using the separate spring element in contact with the blocking element. This advantage occurs in particular if the blocking element is guided in the passage opening with a slight clearance. The transmission of the spring force via the contact surfaces is also advantageous with regard to dirt, which can accumulate at the passage opening. Finally, the installation and removal of the spring element and the blocking element are also particularly simple if the spring element and the blocking element are implemented as separate components that are brought into contact in the mounted state.

In a preferred embodiment, the blocking element comprises an upwardly directed hook, in particular at the free end. If the securing protrusion on the supporting head comprises a hook element directed downwards, in particular obliquely downwards, the ceiling formwork element is even better protected in the blocking position against unintentional lifting off from the supporting head. In the concreting position of the ceiling formwork, the upwardly directed hook of the ceiling formwork element is arranged adjacent to the downwardly directed hook element of the supporting head in such a way that the hook of the ceiling formwork element hooks with the hook element of the supporting head, the blocking element remains in the blocking position, and lifting off is thus prevented if the ceiling formwork element is lifted, for example, obliquely upwards without prior transfer of the blocking element into the release position. Only if the blocking element is deactivated against the force of the spring element before lifting the ceiling formwork element can the hook of the ceiling formwork element pass the hook element of the supporting head.

Preferably, the supporting head comprises two downwardly directed hook elements on each securing protrusion on the underside. As a result, the hooks can be secured to blocking elements of two adjacent ceiling formwork elements.

In order to provide sufficient spring force for the transfer between the blocking and release positions, the blocking element can be fastened to the free end of the spring element.

In another preferred embodiment, the blocking element protrudes inwards from the frame. In this embodiment, the blocking element is located in the release position and in the blocking position in the interior of the frame, as a result of which the blocking element is protected particularly reliably from dirt and damage.

For secure connection to the supporting head, it is favourable in this embodiment if the blocking element protrudes substantially diagonally inwards from a corner region between two side parts of the frame.

In a structurally simple and reliable embodiment, the blocking element is formed integrally with the spring element.

A flat piece may be provided for forming the blocking element and spring element integrally. The blocking element may be formed by the free end of the flat piece. In order to facilitate engagement with the securing protrusion, the free end of the flat piece may be angled, in particular around a bending or folding edge. The spring element may be formed by an elastically deformable central portion of the flat piece.

In addition, the flat piece may comprise at least one fastening portion for fastening to the inner side of the frame. The fastening portion can be connected via a connecting portion to the central portion for forming the spring element, wherein the central portion merges into the free end for forming the blocking element.

In the case of a fastening in the corner region between two abutting side parts of the frame, it is favourable if the flat piece comprises two fastening portions which are arranged at an angle of preferably substantially 90° to one another and are fastened to adjoining side parts of the frame, in particular arranged at an angle of 90° to one another.

In order to achieve a liftout guard at various regions of the ceiling formwork element, in particular at all four corners of the ceiling formwork element, a plurality of, in particular four, blocking elements are preferably provided on the frame, in particular on the longitudinal and/or transverse sides of the frame and/or on the corner regions of the frame. The blocking elements may be identical and implemented according to one of the embodiment variants described above. Thus, the blocking elements can each be connected to a spring element, so that the blocking elements can each be transferred from the blocking position into the release position against the spring force of the spring element. Depending on the embodiment, two blocking elements may be located at opposite ends of the longitudinal or transverse side of the frame in order to engage under the securing protrusions of two formwork supports arranged at a distance from one another. It is particularly preferred if two blocking elements respectively are located at opposite ends on both longitudinal or transverse sides of the frame in order to engage under the securing protrusions of four formwork supports arranged at a distance from one another. These embodiment variants may also be combined with each other. Thus, two blocking elements can be provided on opposite longitudinal and transverse sides of the frame at opposite ends. In this variant, a total of eight blocking elements are provided.

In order to achieve a formwork surface, i.e. a concrete contacting surface, the frame may be connected to the formwork board on the upper side. In one embodiment, the formwork board is permanently connected to the frame. In this way, a so-called panel formwork is obtained, which is used as a single component (which, as intended, cannot be disassembled). In an alternative embodiment, the formwork board is reversibly detachably connected to the frame. In this embodiment, therefore, the ceiling formwork element can be disassembled into the frame and the formwork board.

Preferably, the at least one securing protrusion on the supporting head is integrally connected, i.e. in a non-demountable fashion, to a base plate of the supporting head.

In a preferred embodiment, the securing protrusion on the supporting head comprises, on the upper side, a run-on slope for actuating the blocking element when the ceiling formwork element is lowered vertically in a horizontal position onto the supporting head.

In a first embodiment variant of the supporting head, the securing protrusion is directed outwards with respect to a longitudinal axis of the formwork support. In this case the blocking element can protrude outwards from the side part of the frame in the blocking position, in particular substantially in the longitudinal or transverse direction of the frame.

In a second embodiment variant of the supporting head, the securing protrusion is directed inward. In this variant, the blocking element can protrude inwards from the frame, i.e. in the direction of a centre of the frame.

In order to be able to mount a plurality of ceiling formwork elements on the supporting head, the supporting head preferably comprises a plurality of, in particular four, securing protrusions for connecting to a plurality of, in particular four, ceiling formwork elements. Preferably, exactly four securing protrusions are provided on the supporting head, each of which is connectable to at least one blocking element on the frame of the ceiling formwork element.

In the method for setting up a ceiling formwork, at least the following steps are carried out: providing a formwork support having a supporting head, providing a ceiling formwork element of any one of the above described embodiments, and connecting the ceiling formwork element to the supporting head of the formwork support, wherein the blocking element is arranged on the frame of the ceiling formwork element below the securing protrusion on the supporting head of the formwork support, so that the ceiling formwork element is secured against lifting off from the formwork support.

In a first embodiment variant of the method, the ceiling formwork element is pivoted upwards over a longitudinal or transverse side of the frame in order to arrange the blocking element in the blocking position, wherein the blocking element preferably does not come into contact with the securing protrusion on the supporting head.

In a second embodiment variant of the method, the ceiling formwork element is lowered substantially vertically onto the supporting head in order to arrange the blocking element in the blocking position, wherein the blocking element is deflected into the release position against the spring force of the spring element when it strikes the securing protrusion and is transferred into the blocking position by the spring force when it is lowered further.

In the method for dismantling a ceiling formwork, in which a ceiling formwork element in one of the previously described embodiment variants is connected to a formwork support, at least the following steps are carried out: transferring the blocking element of the ceiling formwork element from the blocking position into the release position, and lifting off the ceiling formwork element substantially in the vertical direction from the formwork support.

The invention will be explained in more detail with reference to exemplary embodiments illustrated in the drawings.

Figs. 1 to 3 each show an embodiment variant of a ceiling formwork according to the invention, in which a plurality of ceiling formwork elements are supported on formwork supports.

Fig. 4 and Fig. 5 show detailed views of a ceiling formwork element according to the invention in a mounted state on the supporting head and secured against up-lifting by a spring-loaded blocking element.

Figs. 6 to 8 show an embodiment variant in which the ceiling formwork element is pivoted upwards about a shorter transverse side into the mounted position on the supporting head.

Figs. 9 to 11 show a further embodiment variant in which the ceiling formwork element is pivoted upwards about a longitudinal side into the mounted position on the supporting head.

Figs. 12 to 14 show another embodiment variant in which the ceiling formwork element is lowered vertically downwards onto the supporting head.

Figs. 15 to 17 show various embodiments of the ceiling formwork element, which differ in the number and arrangement of the blocking elements for the liftout guard.

Fig. 18 and Fig. 19 show views of a further embodiment variant of the ceiling formwork element, in which the blocking element is arranged in the interior of the frame.

Fig. 20 shows a cross section along line XX-XX in Fig. 21.

Fig. 21 shows a plan view of the ceiling formwork element according to Figs. 18 to 20.

Fig. 22 and Fig. 23 show a further embodiment variant, in which the blocking element comprises a hook at the free end for securing to the supporting head.

Figs. 24 to Fig. 26 show a further embodiment, in which the blocking element is separate from the spring element, wherein the blocking element bears against the spring element in such a way that the blocking element can be moved against the spring force of the spring element.

Figs. 1 to 3 show various embodiment variants of a ceiling formwork 1 with which a ceiling or floor element can be concreted. Depending on the dimension of the ceiling or floor element, the ceiling formwork 1 comprises a plurality, in this case, for example, six, ceiling formwork elements 2, which are supported on telescopic, i.e., length-adjustable, ceiling or formwork supports 3. The formwork supports 3 are located in a vertical position on a horizontal ground. At the upper end, the formwork supports 3 each comprise a supporting head 4, to which one to four ceiling formwork elements 2 can be reversibly detachably attached at the corners. The ceiling formwork elements 2 each comprise a (single-part or multi-part) formwork board 5, which is configured to be rectangular with longer longitudinal sides and shorter transverse or narrow sides. The upper sides of the formwork boards form a flat formwork surface, which comes into contact with the concrete during concreting. The ceiling formwork element 2 moreover comprises a formwork frame, hereinafter shortly referred to as frame 6, which supports the formwork board 5. The frame 6 comprises four side parts 7, namely two longitudinal side parts 7A on the longitudinal sides of the ceiling formwork element 2 and two transverse side parts 7B on the transverse or narrow sides of the ceiling formwork element 2. In the embodiment shown, the side parts 7 are arranged perpendicular to the main plane of the ceiling formwork element 2, defined by the formwork facing of the formwork board 5.

In the embodiment variant of Fig. 1, the ceiling formwork element 2 is implemented as a panel formwork element in which a single formwork board 5 is connected to the frame 6. Depending on the embodiment, the formwork board can be permanently connected, i.e. as intended, cannot be disassembled or reversibly detached, to the frame 6. In addition, longitudinal and/or transverse stiffeners may be provided between the longitudinal side parts 7A and/or transverse side parts 7B of the frame 6.

In the embodiment variant of Fig. 2, two formwork elements 9, each along with the formwork board 5, are reversibly releasably connected to the circumferential frame 6, in particular in a mounting position inclined to the horizontal.

In the embodiment variant of Fig. 3, the frame 6 is first arranged in the horizontal concreting position and subsequently connected to the formwork board 5 (not shown in Fig. 3).

All embodiment variants of the ceiling formwork element 2 have in common that at least one blocking element 10 is arranged on the frame 6, which, in the mounted state of the ceiling formwork element 2 on the formwork supports 3, engages under one of the four securing protrusions 11 provided on the supporting heads 4 of the formwork support 3. Thus, the securing protrusion 11 forms an undercut for the blocking element 10. Furthermore, retaining parts 4A, in this case retaining pins, onto which the ceiling formwork element 2 is placed, are provided on the supporting heads 4. The retaining pins 4A serve both for horizontal securing as well as a rotation point for a previously described mounting type. As a result, the ceiling formwork element 2 is secured against up lifting, which could be caused in particular by wind forces that can load the ceiling formwork element 2 from below.

In the embodiments shown, the blocking element 10 is connected to a spring element 12 in such a way that the blocking element 10 can be moved against the spring force of the spring element 12 from a blocking position engaging under the securing protrusion 11 into a release position, here a temporary mounting position, arranged laterally next to the securing protrusion 11.

In the embodiment shown, the liftout guard or blocking element 10 is mounted on the frame 6 pivotable about a horizontal pivot axis in the main plane of the ceiling formwork element 2, i.e. in the mounted state on the supporting head 4. In this case, the blocking element 10 is provided on a lower edge region of one of the longitudinal side parts 7A or transverse side parts 7B of the frame 6 in such a way that the blocking element 10 is arranged under the securing protrusion 11 when the ceiling formwork element 2 is mounted on the supporting head 4.

Advantageously, in the blocking position the blocking element 10 is arranged substantially completely under a retaining edge 6A on the upper side of the frame 6. Thus, in the blocking position, the blocking element 10 is covered on the upper side by the retaining edge 6A, which surrounds the formwork board 5 on the edge side and projects laterally outwards beyond the side part 7. As a result, the blocking element 10 is protected, in particular from falling objects and getting dirty by, for example, concrete.

The retaining edge 6A preferably comprises a drip edge on the underside, which further improves the protection of the blocking element 10.

The frame 6 moreover comprises a lower edge 6B, in particular on the longitudinal and transverse sides, which secures the ceiling formwork element 2 in conjunction with the retaining part 4A in the horizontal direction against displacement away from the securing protrusion 11, and thus the blocking element 10 remains in the blocking position.

Figs. 4 to 17 show a first embodiment variant in which the spring element 12 is fastened to the inside of the respective side part 7 of the frame 6, but the blocking element 10 projects outwards in the blocking position from the outside of the side part 7 of the frame 6, i.e. away from the centre of the ceiling formwork element 2. To this end, the side part 7 of the frame 6 comprises a passage opening 13 through which the blocking element 10 projects outwards in the blocking position. In the embodiment variant shown, a flat spring, in particular a small metal plate, which is connected at one end to the frame 6 and at the other end to the blocking element , is provided as the spring element 12. A pin, which is attached to the free, lower end of the spring element 12, here in the form of the flat spring, is provided as the blocking element 10.

Fig. 4 and Fig. 5 show the mounted state of the ceiling formwork element 2 on the supporting head 4 of the formwork support 3. The blocking element 10 protrudes, at a vertical distance, in a direction parallel to the main plane of the ceiling formwork element 2 under the securing protrusion 11, which in this embodiment variant is directed outwards in the radial direction with respect to the longitudinal axis 3A of the formwork support 3 (cf. Fig. 4). If vertical forces, in particular wind loads, act on the ceiling formwork element from below, cf. arrow 14 in Fig. , the blocking element 10 abuts against the underside of the securing protrusion 11, thereby preventing the ceiling formwork element 2 from lifting off from the supporting head 4 in this region.

Figs. 6 to 8 show a first variant of the method for setting up the ceiling formwork 1. In this variant, the ceiling formwork element

2 is pivoted upwards into the horizontal position via a transverse side, i.e. one of the shorter sides, of the frame 6, cf. arrow 15. In this case, the blocking element 10 is arranged in the blocking position under the securing protrusion 11. If, during the upward pivoting, the blocking element 10 comes into contact with the securing protrusion 11 on the supporting head 4, the blocking element 10 is pressed in by the flexible arrangement on the ceiling formwork element 2. When the ceiling formwork element is completely pivoted upward, the blocking element 10 is automatically returned by the connected spring element 12 back into the blocking position behind the securing protrusion 11.

Figs. 9 to 11 show a second variant of the method during setting up the ceiling formwork 1. In this variant, the ceiling formwork element 2 is pivoted upwards into the horizontal position via a longitudinal side, i.e. one of the longer sides, of the frame 6, cf. arrow 16. The blocking element 10 is arranged in the blocking position under the securing protrusion 11 without contacting the securing protrusion.

Figs. 12 to 14 show a third variant of the method during setting up the ceiling formwork 1. In this variant, the ceiling enabling element 2 is lowered in the vertical direction, cf. double arrow 17, from above onto the supporting head 4. The securing protrusion 11 on the supporting head 4 comprises a run-on slope 18 on the upper side. If the blocking element 10 strikes the run-on slope 18, the blocking element 11 is pressed inwards against the action of the spring element 12, thereby releasing a further lowering of the ceiling formwork element 2 until the blocking element 11 snaps under the securing protrusion 11 due to the restoring forces of the spring element 12.

As can be seen from Figs. 15 to 17, a plurality of blocking elements can each be provided on the frame 6 in conjunction with a spring element 12. These blocking elements 10 with the spring elements 12 can be identical to the embodiment described above.

In the variant of Fig. 15, two blocking elements 10 are provided on each transverse side of the ceiling formwork element 2, which project in the longitudinal direction of the ceiling formwork element 2, with respect to the blocking position, from the transverse side parts 7B of the frame 6.

In the variant of Fig. 16, two blocking elements 10 are provided on each longitudinal side of the ceiling formwork element 2, which project in the transverse direction of the ceiling formwork element 2, with respect to the blocking position, from the longitudinal side parts 7A of the frame 6.

In the variant of Fig. 17, two blocking elements 10 are provided on each longitudinal and transverse side of the ceiling formwork element 2, which project in the longitudinal or transverse direction of the ceiling formwork element 2, with respect to the blocking position, from the longitudinal side parts 7A and transverse side parts 7B of the frame 6.

Figs. 18 to 21 show another embodiment of the ceiling formwork 1. In this embodiment, the blocking element 10 and the spring element 12 are arranged inside the internal space of the frame 6 framed by the side parts 7. The blocking element 10 protrudes inwards with respect to the side parts 7 of the frame 6. In the embodiment shown, the blocking element 10 protrudes substantially diagonally inwards in the direction of the centre of the ceiling formwork element 2 from a corner region 8 formed between two side parts 7 of the frame 6. The supporting head 4 comprises a correspondingly configured securing protrusion 11, which in this embodiment is directed inwards towards the longitudinal axis 3A of the formwork support 3. In the mounted concreting position, the blocking element is again arranged under the securing protrusion 11 on the supporting head 4.

In this embodiment, the blocking element 10 can be formed integrally with the spring element 12. To this end, a flat piece 19 may be provided, wherein a free end portion 19A of the flat piece 19 forms the blocking element 10 and a central portion 19B forms the spring element 12. In the embodiment shown, the central portion 19B of the flat piece 19 is connected via a connecting portion 19C to two fastening portions 19D, which are fastened to the inner sides of the two adjacent side parts 7 of the frame 6.

Figs. 22 and 23 show an embodiment variant in which the blocking element 10 is implemented as a catch with an angular cross section. At the free end, the blocking element 10 comprises an upwardly directed hook 20. Correspondingly, the supporting head 4 comprises two obliquely downwardly directed hook elements 21 on the undersides of the securing protrusions 11, which prevent the ceiling formwork element 2 from being unintentionally lifted off from the supporting head 4 in the concreting position, with the blocking element 10 being in the blocking position.

Fig. 24 to Fig. 26 show a modification of the embodiment according to Fig. 4 and Fig. 5. In contrast to the embodiment of Fig. 4 and Fig. 5, the blocking element 10 according to Fig. 24 to Fig. 26 is separated from the spring element 12. The blocking element 10 and the spring element 12 are connected to one another in that the blocking element 10 bears against the spring element 12, in this case against the lower end of the spring element 12. In the embodiment shown, a pin-shaped portion of the blocking element 10 protrudes outwards through the passage opening 13 in the blocking position. In the interior of the frame, the blocking element 10 comprises a contact element, in this case a small contact plate A, which prevents the blocking element 10 from falling out of the passage opening 13 to the outside. In the embodiment variant shown, a flat spring, which bears against the small contact plate of the blocking element 10, so that the blocking element 10 is pressed outwards in the direction of the blocking position, is provided as the spring element 12.

Claims (24)

Claims:

1. A ceiling formwork element (2) for connecting to a supporting head (4) of a formwork support (3), comprising: a frame (6) for a formwork board (5), a blocking element (10) on the frame (6) for engaging under a securing protrusion (11) on the supporting head (4) of the formwork support (3), characterised in that the blocking element (10) is connected to a spring element (12), so that the blocking element (10) can be transferred from a blocking position into a release position against the spring force of the spring element (12).

2. The ceiling formwork element (2) according to claim 1, characterised in that the blocking element (10) can be pivoted from the blocking position into the release position about a preferably substantially horizontal pivot axis.

3. The ceiling formwork element (2) according to claim 1 or 2, characterised in that the blocking element (10) is provided on a lower edge region of a longitudinal or transverse side part (7; 7A, 7B) of the frame (6).

4. The ceiling formwork element (2) according to any one of claims 1 to 3, characterised in that the spring element (12) is fastened to the inner side of the side part (7) of the frame (6).

5. The ceiling formwork element (2) according to any one of claims 1 to 4, characterised in that a flat spring is provided as the spring element (12), which is connected at one end to the frame (6) and at the other end to the blocking element (10).

6. The ceiling formwork element (2) according to any one of claims 1 to 5, characterised in that the blocking element (10) projects outwards from the side part (7) of the frame (6) in the blocking position, in particular substantially in the longitudinal or transverse direction of the frame (6).

7. The ceiling formwork element (2) according to claim 6, characterised in that the side part (7) of the frame (6) comprises a passage opening (13) through which the blocking element (10) protrudes outwards in the blocking position.

8. The ceiling formwork element (2) according to any one of claims 1 to 7, characterised in that a pin is provided as the blocking element (10).

9. The ceiling formwork element (2) according to any one of claims 1 to 8, characterised in that the blocking element (10) is fastened to the free end of the spring element (12).

10. The ceiling formwork element (2) according to any one of claims 1 to 5, 8 or 9, characterised in that the blocking element (10) protrudes inwards from the frame (6).

11. The ceiling formwork element (2) according to claim 10, characterised in that the blocking element (10) protrudes substantially diagonally inwards from a corner region (8) between two side parts (7; 7A, 7B) of the frame (6).

12. The ceiling formwork element (2) according to any one of claims 1 to 11, characterised in that the blocking element (10) is formed integrally with the spring element (12).

13. The ceiling formwork element (2) according to any one of claims 1 to 12, characterised in that a plurality of blocking elements (10) are provided on the frame (6), in particular on the longitudinal and/or transverse sides of the frame (6) and/or on the corner regions (8) of the frame (6).

14. The ceiling formwork element (2) according to any one of claims 1 to 8, 10, 11 or 13, characterised in that the blocking element (10) and the spring element (12) are connected to each other in that the blocking element (10) bears against the spring element (12), in particular against the lower end of the spring element (12).

15. The ceiling formwork element (2) according to any one of claims 1 to 14 characterised in that the frame (6) is connected to the formwork board (5).

16. The ceiling formwork (1) comprising: a ceiling formwork element (2) according to any one of claims 1 to 15, and a formwork support (3) having a supporting head (4) which comprises a securing protrusion (11), wherein the blocking element (10) engages under the securing protrusion (11) of the supporting head (4) in the blocking position.

17. The ceiling formwork (1) according to claim 16, characterised in that the securing protrusion (11) on the supporting head (4) comprises, on the upper side, a run-on slope (18) for actuating the blocking element (10) when the ceiling formwork element (2) is lowered vertically in a horizontal position onto the supporting head (4) .

18. The ceiling formwork (1) according to claim 16 or 17, characterised in that the securing protrusion (11) is directed outwards with respect to a longitudinal axis (3A) of the formwork support (3), wherein the blocking element (10) is configured in particular according to any one of claims 2 to 9 or claim 14.

19. The ceiling formwork (1) according to claim 16 or 17, characterised in that the securing protrusion (11) is directed inwards, wherein the blocking element (10) is configured according to any one of claims 10 to 12.

20. The ceiling formwork (1) according to any one of claims 16 to 19, characterised in that the supporting head (4) comprises a plurality of, in particular four, securing protrusions (11) for connecting to a plurality of, in particular four, ceiling formwork elements (2).

21. A method for setting up a ceiling formwork (2), comprising the steps of: providing a formwork support (3) with a supporting head, providing a ceiling formwork element (2) according to any one of claims 1 to 15, and connecting the ceiling formwork element (2) to the supporting head (4) of the formwork support (3), wherein the blocking element (10) is arranged on the frame (6) of the ceiling formwork element (2) below the securing protrusion (11) on the supporting head (4) of the formwork support (3), so that the ceiling formwork element (2) is secured against lifting off from the formwork support (3).

22. The method according to claim 21, characterised in that the ceiling formwork element (2) is pivoted upwards over a longitudinal or transverse side of the frame (6) in order to arrange the blocking element (10) in the blocking position, wherein the blocking element (10) preferably does not come into contact with the securing protrusion (11) on the supporting head (4).

23. The method according to claim 21, characterised in that the ceiling formwork element (2) is lowered substantially vertically onto the supporting head (4) in order to arrange the blocking element (10) in the blocking position, wherein the blocking element (10) is deflected into the release position against the spring force of the spring element (12) when it strikes the securing protrusion (11) and is transferred into the blocking position by the spring force when it is lowered further.

24. A method for dismantling a ceiling formwork (1), in which a ceiling formwork element (2) according to any one of claims 1 to is connected to a formwork support (3), having the steps of: transferring the blocking element (10) of the ceiling formwork element (2) from the blocking position into the release position, and lifting off the ceiling formwork element (2) substantially in the vertical direction from the formwork support (3).

1

2

4

6 3 7 7A 3

7B

Fig. 1

Fig.