SAFETY DEVICE FOR CEILING FORMWORK

Description

The invention relates to a safety device for a ceiling formwork structure, which comprises a first grid. Further, the invention relates to methods for deploying formwork panels of a ceiling formwork structure, which can be used in particular in conjunction with the safety device according to the invention.

When a ceiling formwork structure is being erected, formwork panels are usually laid out on a structure made from vertical formwork supports and horizontal formwork support beams, which are preferably designed as longitudinal beams and transverse beams. In general, the formwork panels are laid out manually by one or more installers. In this context, the installer runs the risk of falling through the coarse-meshed arrangement of the formwork support beams which are not yet covered with formwork panels.

Grid-based safety devices and net-based safety devices are known from the state of the art.

The document EP 3 231 961 A1 shows a horizontal formwork system and a safety method for installing formwork panels in a horizontal formwork system.

The document DE 10 2017 123 014 A1 shows a spacer element for supporting two yoke timbers of a ceiling formwork structure that extend parallel to each other and are carried on ceiling supports, as well as a fall protection system for a ceiling formwork structure with the spacer element.

It is an object of the invention to provide an improved safety device for ceiling formwork structures. It is a further such object to provide an improved method of deploying formwork panels of a ceiling formwork structure.

According to the invention, this object is achieved by a safety device for a ceiling formwork structure and a method of deploying formwork panels of a ceiling formwork structure in accordance with the independent claims. Advantageous embodiments are claimed in the dependent claims. A first aspect of the invention relates to a safety device for a ceiling formwork structure, which comprises a first grid on which a projection is arranged along a first edge, which projection protrudes in relation to a plane which is spanned by the first grid, in order to form a stop member for formwork panels of the ceiling formwork structure against the safety device.

A second aspect of the invention relates to a safety device system which comprises a plurality of safety devices in accordance with the first aspect of the invention, wherein adjacent safety devices are connected along the edges which are arranged at least substantially perpendicular to the respective first edge, in particular at running channels.

A third aspect of the invention relates to a ceiling formwork arrangement comprising formwork support beams, formwork supports, formwork panels and at least one safety device in accordance with the first aspect of the invention or a safety device system in accordance with the second aspect of the invention, wherein the formwork support beams are supported by the formwork supports, and the formwork panels and the at least one safety device lie on the formwork support beams, wherein the at least one safety device is arranged in such a way that, in each case, the first edge is oriented at least substantially perpendicular to a longitudinal direction of the formwork support beams.

A fourth aspect of the invention relates to a method of deploying formwork panels of a ceiling formwork structure, comprising the following process steps:

• • a) placing a safety device for a ceiling formwork structure, which comprises a planar first grid, on which a projection is arranged along a first edge, which protrudes with respect to a plane which is spanned by the first grid, in particular in accordance with any one of claims 1 to 10, on an arrangement of a plurality of formwork support beams which are oriented at least substantially in parallel, in such a way that the first edge is oriented perpendicular to a longitudinal direction of the formwork support beams and that the stop member points upwards and is oriented towards the side of the formwork support beams from which the formwork panels are intended to be deployed;
  • b) positioning a first formwork panel in such a way that an edge of the first formwork panel comes into abutment with the upstand of the safety device; and
  • c) slidingly moving the entire arrangement comprising the first formwork panel and the safety device in the longitudinal direction of the formwork support beams until the first formwork panel can be placed or has been placed on the formwork support beams.

A fifth aspect of the invention relates to a method of deploying formwork panels of a ceiling formwork structure, comprising the following process steps:

• • a) placing a safety device system which comprises a first safety device and a second safety device for a ceiling formwork structure, each of which comprises a planar first grid on which a projection is arranged along a first edge which protrudes with respect to a plane which is spanned by the at least one first grid, wherein the first grids have running channels at the respective two edges which are arranged at least substantially perpendicular to the first edge, wherein the two safety devices are connected at the running channels;
  • b) positioning a first formwork panel in such a way that an edge of the first formwork panel comes into abutment with the projection of the first safety device;
  • c) slidingly moving the entire arrangement comprising the first formwork panel and the first safety device in the longitudinal direction of the formwork support beams until the first formwork panel can be placed or has been placed on the formwork support beams;
  • d) positioning a second formwork panel in such a way that an edge of the second formwork panel comes into abutment with the upstand of the second safety device; and
  • e) slidingly moving the entire arrangement comprising the second formwork panel and the second safety device in the longitudinal direction of the formwork support beams until the second formwork panel can be placed or has been placed on the formwork support beams.

In the sense of the invention, the term “planar” preferably means “having an infinite radius of curvature”.

In the sense of the invention, “a plurality” means “at least two”.

The invention is based on the realization that areas of the formwork construction in which no formwork panels have yet been laid should be covered in the interest of the safety of the installers of the formwork panels.

The invention follows the approach of covering, with a grid, the edge area of an area of a ceiling formwork structure that is already covered with formwork panels, which edge area is dangerous for the installers. The grid is a part of a safety device which is characterized by the fact that it has a projection with which adjacent formwork panels can come into abutment.

In this context, the grid is arranged on the formwork support beams in a slidingly movable manner so that it can be slidingly moved by an installer with the aid of a formwork panel, which is placed with its front edge against the projection of the grid, the movement corresponding to the dimension of a formwork panel, whereupon the formwork panel is placed on the formwork support beams.

In this context, the projection prevents an adjacent formwork panel from being slidingly moved over the grid. As a result of this, an installer can push formwork panels from his position in the direction of installation of the ceiling formwork structure “from behind”, whereby the safety device is also slidingly moved by the respective formwork panel.

The invention offers a simple and cost-effective solution for securing the process of constructing a formwork by means of a ceiling formwork structure. By providing the projection, the moving of the safety device can be accomplished in a single operation together with the deploying of the formwork panels. In particular, the work flow of the installers is not adversely affected by moving the safety device.

Preferably, the first grid is planar. As a result of this, it is particularly easy to place it on formwork support beams and to store it when it is not in use. Further preferably, the projection is formed in one piece with the grid. Further preferably, the projection is formed by an upstand of the grid. In this variant, the safety device is particularly inexpensive to manufacture. In addition, it has a particularly high strength due to the one-piece construction. Further preferably, the projection extends over the entire length of the first edge. As a result of this, a particularly good stop member for the formwork panels is created.

In an advantageous embodiment of the safety device, this comprises a second grid, wherein the first grid is pivotably connected to the second grid along a second edge, which is located opposite to the first edge and which extends at least substantially parallel to it.

Preferably, in a first position, the second grid lies in the plane which is spanned by the first grid. Further preferably, the plane is spanned by the first grid and the second grid.

Further preferably, the second grid is pivotable between a first position, in which it forms a single plane with the first grid, and a second position, in which it forms a further plane with respect to the first grid.

This has the advantage that the protection function is provided right up to the edges of the ceiling formwork structure, in that, before an edge of the ceiling formwork structure is reached, the first grid can be lifted in a first step and further formwork panels can be inserted underneath, and, in a second step, the first grid can be folded onto the second grid, and, in turn, these two grids can be lifted, and further formwork panels can be inserted underneath.

In a further advantageous embodiment of the safety device, the projection has, in a direction perpendicular to the plane, a greater extent than a thickness of a formwork panel which is meant to come into abutment with the projection, in particular an extent of about twice the thickness.

Preferably, the projection has an extent of more than about 21 mm in the direction perpendicular to the plane, preferably an extent of more than about 27 mm, more preferably an extent of about 42 mm, most preferably an extent of about 54 mm.

This has the advantage that the front edge of a formwork panel, which is guided, by an installer, over a formwork panel that has already been placed, can be securely positioned against the projection of the grid.

In a further advantageous embodiment of the safety device, this has guide elements which are arranged on a side of the plane which faces away from the upstand, which plane is spanned by the first grid and/or by the second grid.

The guide elements ensure that there is a lateral guide for the safety device along the formwork support beams. The safety device can therefore not slip away “sideways”, which would make it necessary to correct its orientation. On the one hand, this would put the installer in danger, as they would have to move into the danger zone at the edge of the formwork structure, and on the other hand it would also mean an interruption to the work flow of constructing the formwork. Irrespective of this, a correction of the orientation can also be carried out while the installer is in a safe position by moving the grid via the upstand.

Preferably, the guide elements are arranged at a distance of about 0.145 m, more preferably at a distance of about 0.14 m, even more preferably at a distance of about 0.12 m, most preferably at a distance of about 0.10 m from each of the two edges of the first grid and/or the second grid, which extend at least substantially perpendicular to the first edge. In this context, the two edges preferably form the largest extent of the grid in a direction perpendicular to the first edge.

This has the advantage that the guide elements can easily be fed between the formwork support beams and still provide sufficient lateral guidance during the sliding movement.

In a further advantageous embodiment of the safety device, the first grid and the second grid are equipped with guide elements. If both grids of a safety device are equipped with guide elements, a particularly good guidance of the safety device along the formwork support beams is ensured. In a further advantageous embodiment of the safety device, the guide elements are profiles, in particular rails or round profiles, which extend at least substantially perpendicular to the first edge.

This has the advantage that inexpensive and widely available standard parts, in particular standard profiles, can be used.

In a further advantageous embodiment of the safety device, the first grid and/or the second grid comprises at least two layers of grid bars, wherein at least grid bars of the layer which are arranged on a side which faces away from the projection are round.

This has the advantage that the grids can easily be slidingly moved on the formwork support beams. In a further advantageous embodiment of the safety device, the first grid and/or the second grid comprises at least two layers of grid bars, wherein at least grid bars of the layer which are arranged on a side which faces away from the projection, are oriented at least substantially parallel to the first edge.

This also has the advantage of facilitating the sliding movement of the grids on the formwork support beams. This is because, in this configuration, when used as intended, the grid bars that are arranged perpendicular to the longitudinal axes of the formwork support beams rest on the formwork support beams.

In a further advantageous embodiment of the safety device, the first grid and/or the second grid are rectangular, and, preferably, the first edge and/or the second edge has an edge length L₁ of about 1.0 m to 3.5 m, preferably a length of about 2.0 m to 2.5 m, and most preferably of about 2.0 m, wherein, preferably, each of the two edges of the first grid and/or the second grid, which extend at least substantially perpendicular to the first edge, have an edge length L₂, L₃ of about 0.50 m to 1.5 m, preferably of about 1 m.

This has the advantage of good cooperation between the grids and the formwork panels, which usually have the same or similar dimensions, in particular when shoring and folding when an end of an area to be provided with a formwork structure has been reached. In this case, the safety device can also be arranged on formwork panels of similar dimensions, in particular formwork panels of slightly larger dimensions, in such a way that the grids can be slidingly moved along a respective single “track” of formwork panels that are arranged one behind the other. This is in particular of advantage if several “tracks” of formwork panels are arranged next to each other, as is usual with ceiling formwork structures.

In a further advantageous embodiment of the safety device, the two edges of the first grid, which extend at least substantially perpendicular to the first edge, have a greater edge length L₂ than the corresponding edges L₃ of the second grid, in such a way that the first grid can be folded onto the second grid on the side of the projection.

This has the advantage that the grids which have been folded together in this way form a compact unit and, in addition, the second grid does not protrude over the area to be provided with a formwork structure, where it might possibly abut against a boundary structure located there.

In a further advantageous embodiment of the safety device, the first grid and/or the second grid have running channels on each of the two edges which are arranged at least substantially perpendicular to the first edge, in order to connect the safety device to further safety devices.

This has the advantage that a continuous protection against falling can also be guaranteed in a direction perpendicular to the first edge. In addition, the individual safety devices, when used as intended, can be slidingly moved independently of one another in the direction of the formwork support beams. In a further advantageous embodiment of the safety device, a mesh width of the first grid and/or of the second grid is designed in such a way that an adult person cannot fall through the meshes, wherein the mesh width is preferably about 12 cm to about 15 cm.

This offers the advantage of high safety with minimum use of materials and low weight of the safety device.

In a further advantageous embodiment of the method of deploying formwork panels of a ceiling formwork structure in accordance with the fourth aspect of the invention, the method comprises the following further process steps:

• • d) positioning a second formwork panel in such a way that an edge of the second formwork panel comes into abutment with the projection of the safety device; and
  • e) slidingly moving the entire arrangement comprising the second formwork panel and the safety device in the longitudinal direction of the formwork support beams until the second formwork panel can be placed on the formwork support beams.

These process steps can be repeated as often as desired until a ceiling formwork structure has been completed. By continuing the method according to the fourth aspect, an unlimited number of formwork panels can be lined up in order to form a ceiling formwork structure. In this process, the workplace safety of the installer is always ensured. In this context, moving the safety device to a new place is fully integrated into the process of laying the formwork panels.

In further advantageous embodiments of the methods of deploying formwork panels of a ceiling formwork structure in accordance with the fourth or fifth aspect of the invention, wherein the safety device further comprises a second planar grid, wherein the first grid is pivotably connected to the second grid along a second edge which is opposite to, and extends at least substantially parallel to, the first edge, the process steps b) and c) or b) to f) are repeated until the safety device has reached an end of an area to be provided with a formwork structure, wherein the methods further comprise the following process steps:

• • d) positioning a further formwork panel under the first edge of the first grid in such a way that the first grid is pivoted upwards;
  • e) slidingly moving the further formwork panel in the longitudinal direction of the formwork support beams under the first grid and/or under the second grid; and
  • f) folding the first grid to the second grid.

By inserting the further formwork panel under the first grid and folding the first grid over, the safety of the installer can be ensured right up to the edge of a ceiling formwork structure. In addition to the first grid and the second grid of the safety device, further first grids and second grids of further safety devices can be present, depending on the width of the area to be provided with a formwork structure.

In a further advantageous embodiment of the method of deploying formwork panels of a ceiling formwork structure in accordance with the fifth aspect of the invention, this method comprises the following further process steps:

• • g) positioning a further formwork panel under an edge of the second grid at which the second grid is connected to the second edge of the first grid, in such a way that the second grid is pivoted upwards;
  • h) slidingly moving the further formwork panel in the longitudinal direction of the formwork support beams under the second grid; and
  • i) removing the safety device from the formwork support beams.

Also by inserting the further formwork panel under the second grid, the safety of the installer can be ensured right up to the edge of a ceiling formwork structure. Here, the additional formwork panel must, in general, be cut to size.

In a further advantageous embodiment of the method of deploying formwork panels of a ceiling formwork structure in accordance with the fifth aspect of the invention, this method comprises the following further process steps:

• • j) positioning a third formwork panel in such a way that an edge of the third formwork panel comes into abutment with the projection of the first safety device;
  • k) slidingly moving the entire arrangement comprising the third formwork panel and the first safety device in the longitudinal direction of the formwork support beams until the third formwork panel can be placed on the formwork support beams; and/or
  • l) stepping onto the second formwork panel;
  • m) positioning a fourth formwork panel in such a way that an edge of the fourth formwork panel comes into abutment with the projection of the second safety device; and
  • n) slidingly moving the entire arrangement comprising the fourth formwork panel and the second safety device in the longitudinal direction of the formwork support beams until the fourth formwork panel can be placed or has been placed on the formwork support beams.

In this way, the safety device can be gradually moved across its entire width in the direction in which the installation of the formwork structure progresses. In this context, the installer is always secured across the entire width of the formwork structure.

Further features and advantages of the invention will become apparent from the following description with reference to the figures. The figures show, at least partially schematically:

FIG. 1 shows a perspective view of a first example embodiment of a safety device;

FIG. 2 shows a plan view of a second example embodiment of a safety device;

FIG. 3 shows a perspective view of a first example embodiment of a safety device system;

FIG. 4 shows a first example embodiment of a method of deploying formwork panels;

FIG. 5 shows a perspective view of a second example embodiment of a safety device system;

FIG. 6 shows the first example embodiment of a safety device according to FIG. 1 in three side views a, b, c, which illustrate the principle of operation of the safety device;

FIG. 7 Shows a Second Example Embodiment of a Method of Deploying Formwork panels;

FIG. 8 shows a top view of an example embodiment of a ceiling formwork arrangement;

FIG. 9 shows an example embodiment of a ceiling formwork arrangement in a cross-sectional view in the plane A-A in accordance with FIG. 6;

FIG. 10 shows an example embodiment of a ceiling formwork arrangement in a cross-sectional view in the plane B-B in accordance with FIG. 6;

FIG. 11 shows a side view of an example embodiment of a safety device;

FIG. 12 shows a side view of an example embodiment of a safety device; and

FIG. 13 shows the example embodiment of a safety device of FIG. 3 in an enlarged view A.

FIG. 1 shows a perspective view of a first example embodiment of a safety device 1.

The safety device 1 comprises a first grid 2, at the first edge 3 of which there is a projection 4. Preferably, the projection, as is shown in FIG. 1, is constructed as an upstand of the first grid 2. The projection 4 preferably extends over at least substantially the entire length of the first edge 3. In particular, the projection 4 can also be formed in sections from several partial projections along the first edge 3. A second grid 6 is preferably joined onto the second edge 7. The grids 2, 6 can be folded towards each other about the second edge 7, for which purpose hinges are used, for example. Preferably, these hinges are constructed as metal rings.

At each of the lateral edges of the grids 2, 6, there are preferably running channels 9, which can be used to connect to further safety devices 1 (not shown).

FIG. 2 shows a plan view of a second example embodiment of a safety device 1.

This safety device also comprises a first grid 2, at the first edge 3 of which there is a projection 4. The second grid 6 is joined onto the second edge 7. The grids 2, 6 can be folded towards each other about the second edge 7. At the lateral edges of the grids 2, 6, there are respective running channels 9, which can be used to connect to further safety devices 1 (not shown).

In contrast to the first example embodiment according to FIG. 1, the second example embodiment has guide elements 8 which are attached to the first grid 2 and/or to the second grid 6 and which are spaced at a distance de of preferably about 14.5 cm from the lateral edges of the grids 2, 6 and which extend at least substantially perpendicular to the first edge 3.

The guide elements 8 are preferably bent or angled at their ends in such a way that a steering portion is arranged at least on the side which faces away from the first edge 3, which steering portion is bent or angled towards a central axis perpendicular to the first edge 3 of the grids 2, 6.

The steering portion of the guide elements 8 serves as a lead-in chamfer and facilitates the feed-in process between the formwork support beams 11 (not shown). In this context, the guide elements 8 are preferably curved, as is shown in FIG. 2, whereby the curvature is concave in relation to the lateral edges of the grids 2, 6, and/or the ends are bent away in relation to the lateral edges of the grids 2, 6. Preferably, a mesh width di is selected in such a way that an adult human being cannot slip through the meshes, preferably between about 12 cm and about 15 cm.

FIG. 3 shows a perspective view of a first example embodiment of a safety device system 20.

Three safety devices 1a, 1b, 1c lie next to each other on formwork support beams 11, and adjacent safety devices 1a, 1b; 1a, 1c are connected to each other at the running channels 9. Here, too, the running channels 9 between the safety devices 1a, 1b, 1c are preferably connected with rings or carabiners (not shown).

In the following, a first method (200) of deploying formwork panels (5) of a ceiling formwork structure by means of the safety device system 20 is explained with reference to FIG. 4:

In a first process step 201, a safety device system 20 which comprises a first safety device 1a, a second safety device 1b and a third safety device 1c for a ceiling formwork structure is placed on an arrangement of a plurality of formwork support beams 11 which are oriented at least substantially parallel to one another, in such a way that the respective first edge 3 of each of the safety devices 1, 1b, 1c is oriented perpendicular to a longitudinal direction of the formwork support beams 11 and the projection 4 points upwards and is oriented towards the side of the formwork support beams 11 from which the formwork panels 5 are intended to be deployed.

In a second process step 202, a first formwork panel 5 in such a way that an edge of the first formwork panel 5 comes into abutment with the projection 4 of the first safety device 1a.

In a third process step 203, the entire arrangement comprising the first formwork panel 5 and the first safety device 1a is slidingly moved in the longitudinal direction of the formwork support beams 11 until the first formwork panel 5 can be placed or has been placed on the formwork support beams 11.

This sliding movement process is illustrated in FIG. 3: A formwork panel 5 is in engagement with the projection 3 of the first grid 2. If the first safety device 1a is slidingly moved even further in the longitudinal direction of the formwork support beams 11, the formwork panel 5 can be inserted horizontally. The running channels 9 are connected to each other in such a way that the first safety device 1a can only advance, with respect to a further safety device 1b; 1c that is connected to it via the running channels 9, up to a distance in the longitudinal direction of the formwork support beams that corresponds to the length of a running channel (9). Preferably, the length of the running channels (9) corresponds to the lateral edge length L₂, L₃ of the grids 2, 6.

In a fourth process step 204, a second formwork panel 5 (not shown) is positioned in such a way that an edge of the second formwork panel 5 comes into abutment with the projection 4 of the second safety device 1.

In a fifth process step 205, the entire arrangement comprising the second formwork panel 5 and the second safety device 1b is slidingly moved in the longitudinal direction of the formwork support beams 11 until the second formwork panel 5 can be placed or has been placed on the formwork support beams 11.

In a sixth process step 206, the first formwork panel is preferably stepped upon by the installer.

In a seventh process step 207, a third formwork panel 5 is positioned in such a way that an edge of the third formwork panel 5 comes into abutment with the projection of the first safety device 1a.

In an eighth process step 208, the entire arrangement comprising the third formwork panel and the first safety device is slidingly moved in the longitudinal direction of the formwork support beams until the third formwork panel can be placed on the formwork support beams.

In a ninth process step 209, the second formwork panel 5 is stepped upon.

In a tenth process step 210, a fourth formwork panel is positioned in such a way that an edge of the fourth formwork panel 5 comes into abutment with the projection of the second safety device.

In an eleventh process step 211, the entire arrangement comprising the fourth formwork panel 5 and the second safety device 1b is slidingly moved in the longitudinal direction of the formwork support beams until the fourth formwork panel 5 can be placed or has been placed on the formwork support beams.

This process is repeated with the safety devices 1a, 1b, 1c until the entire ceiling formwork structure has been deployed. In addition, when an end of the area to be provided with a formwork structure has been reached, the first grids can be folded over and the individual safety devices 1a, 1b, 1c can be removed from the formwork support beams 11, as will be explained below with reference to FIGS. 6 and 7.

FIG. 5 shows a perspective view of a second example embodiment of a safety device system 20.

Formwork panels 5 with a smaller width than in the example embodiment shown in FIG. 3 are used here. In general, these are used in a filler zone. The two safety devices 1 are arranged so that they overlap with each other. This allows the safety device system 20 to be adapted to the width of an area to be provided with a formwork structure. Preferably, the overlapping safety devices are also connected with rings or carabiners.

FIG. 6 shows the first example embodiment of a safety device 1 according to FIG. 1 in three side views a, b, c, which illustrate the principle of operation of the safety device.

In the following, a second method 100 of deploying formwork panels 5 of a ceiling formwork structure is explained with reference to FIG. 7:

In a first process step 101, a safety device 1 is placed on an arrangement of a plurality of formwork support beams 11 (not shown) which are oriented at least substantially parallel to one another, in such a way that the first edge 3 is oriented perpendicular to a longitudinal direction of the formwork support beams 11 and the projection 4 points upwards and is oriented towards the side of the formwork support beams 11 from which the formwork panels 5 are intended to be deployed.

In a second process step 102, a first formwork panel 5a is positioned in such a way that an edge of the first formwork panel 5a comes into abutment with the projection 4 of the safety device 1.

In a third process step 103, the entire arrangement comprising the first formwork panel 5a and the safety device 1 is slidingly moved in the longitudinal direction of the formwork support beams 11 until the first formwork panel 5a can be placed or has been placed on the formwork support beams 11. This state is shown in FIG. 6 a.

In a fourth process step 104, the first formwork panel 5a is preferably stepped upon by an installer.

In a fifth process step 105, a second formwork panel 5b is positioned in such a way that an edge of the second formwork panel 5b comes into abutment with the projection 4 of the safety device 1. This is also shown in FIG. 6a.

In a sixth process step 106, the entire arrangement comprising the second formwork panel 5b and the safety device 1 is slidingly moved in the longitudinal direction of the formwork support beams 11 until the second formwork panel can be placed on the formwork support beams. In this context, the front edge of the second formwork panel 5b engages with the projection 4 of the first grid 2 of the safety device 1. This process is indicated by the arrows in FIG. 6a.

The process steps 104 to 106 are preferably repeated until the safety device has reached an end of an area to be provided with a formwork structure.

In a seventh process step 107, a third formwork panel 5c is positioned under the first edge of the first grid 2 in such a way that the first grid 2 is pivoted upwards. This state is shown in FIG. 6b.

In an eighth process step 108, the third formwork panel 5c is slidingly moved under the first grid in the longitudinal direction of the formwork support beams. FIG. 6b shows this process of slidingly moving a formwork panel 5 under the first grid 2. For this purpose, the first grid 2 is lifted slightly. As is shown in FIG. 6 b, this step is carried out when an end of the area to be provided with a formwork structure has been reached and the safety device 1 cannot be slidingly moved any further in the longitudinal direction of the formwork support beams, for example due to an existing wall panel or wall formwork structure 13 having been reached. Then, in the example embodiment shown, a fourth formwork panel 5d is slidingly moved under the first grid 2.

In a ninth process step 109, the first grid 2 is folded over to the second grid 6. This state is shown in FIG. 6c. In turn, the entire arrangement comprising the first grid 2 and the second grid 6 can now be lifted, and, in a tenth and eleventh process step 110, 111, further formwork panels (not shown) positioned under the safety device 1 can be slidingly inserted until the entire area that is to be provided with a formwork structure is covered with formwork panels 5. Subsequently, the safety device 1 can be removed in a twelfth process step 112.

FIG. 8 shows a top view of an example embodiment of a ceiling formwork arrangement.

The safety device 1 shown corresponds to the example embodiment of FIG. 2. Formwork support beams 11 are also shown. The formwork support beams 11 are preferably at a distance of about 50 cm. In areas respectively at both ends of the safety device 1 in the longitudinal direction of the formwork support beams 11, the formwork support beams 11 are constructed as double beams. The distances d_s, d₄ and ds of the grid bars of the safety device 1 in the transverse direction to the formwork support beams 11 are selected in such a way that the grid bars disposed in the longitudinal direction are spaced apart from the formwork support beams. Preferably, d₃ is 24 cm, d₄ is 46 cm and d₅ is 50 cm. The distance d₂ of preferably about 14.5 cm of the guide elements 8 from the lateral edge of the safety device 1 is selected in such a way that, when the safety device 1 is being slidingly moved on the formwork support beams 11, the guide element 8 ensures a lateral guidance in the area of the double beams and, in particular, it ensures that it does not block the sliding movement.

FIG. 9 shows the example embodiment of a ceiling formwork arrangement 10 in a cross-sectional view according to the plane A-A of FIG. 8.

A large number of parallel formwork support beams 11 can be seen on which two safety devices 1 are placed next to each other. Preferably, the formwork support beams 11 are each supported by formwork supports. Formwork supports are not shown in this view.

FIG. 10 shows the example embodiment of a ceiling formwork arrangement 10 in a cross-sectional view according to the plane B-B of FIG. 8.

A large number of parallel formwork support beams 11 can be seen on which two safety devices 1 are placed next to each other. In each of the areas at the lateral ends of the safety devices 1, the formwork support beams 11 are constructed as double beams. Preferably, each of the formwork support beams 11 is supported by formwork supports 12. Preferably, the formwork support beams 11 rest on yoke carriers, and these are supported by formwork supports 12.

FIG. 11 shows a side view of an example embodiment of a safety device 1.

A height L₃ of the projection 4 is preferably more than the thickness of a formwork panel 5 (not shown), preferably about twice the thickness. Guide elements 8 can also be seen, which are attached to the grids 2, 6, in such a way that they are located below the grids 2, 6 when these are placed on formwork supports 11 (not shown) in accordance with their intended use.

FIG. 12 shows a side view of the example embodiment of a safety device of FIG. 9, wherein the second grid 2 is folded onto the first grid 6.

In the embodiment shown, the first grid 2 has an identical or greater edge length than the second grid 6. In other, advantageous embodiments, as is shown for example in FIG. 6c, the edge length of the first grid 2 is smaller than that of the second grid 6, as a result of which, in the folding process, the projection 4 stands up on the second grid 6.

FIG. 13 shows the enlarged portion C of the folded safety device 1 of FIG. 12.

It can be seen that the cross-section of the grid bars which extend parallel to the first edge of the first grid 2 is round. In relation to an installation position of the safety device 1 resting on formwork support beams 11, the guide elements 8 are attached below the round grid bars.

It is to be noted that the example embodiments are merely examples which are not intended to limit the scope of protection, the applications and the structure in any way. Rather, by the preceding description, the skilled person is provided with a guideline for the implementation of at least one example embodiment, whereby various modifications, in particular with regard to the function and arrangement of the components described, can be made without departing from the scope of protection as it results from the claims and/or combinations of features which are equivalent to these.

LIST OF REFERENCE SIGNS

• • 1 safety device
  • 2 first grid
  • 3 first edge
  • 4 projection
  • 5 formwork panel
  • 6 second grid
  • 7 second edge
  • 8 guide element
  • 9 running channels
  • 10 ceiling formwork arrangement
  • 11 formwork support beam
  • 12 formwork supports
  • 13 wall formwork structure/wall panel
  • 20 safety device system
  • L₁ edge length
  • L₂ edge length
  • L₃ edge length
  • D₁ mesh size
  • D₂ distance
  • D₃ distance
  • D₄ distance
  • D₅ distance
  • 100 method of deploying formwork panels
  • 200 method of deploying formwork panels