WO2023242253A1

WO2023242253A1 - Connection device, ceiling formwork system comprising a connection device, and method for producing a ceiling formwork

Info

Publication number: WO2023242253A1
Application number: PCT/EP2023/065932
Authority: WO
Inventors: Katja Sedelmaier; Florian Sturm
Original assignee: Peri Se
Priority date: 2022-06-14
Filing date: 2023-06-14
Publication date: 2023-12-21
Also published as: DE102022114961A1

Abstract

The invention relates to a connection device (100) for connecting a securing device (200), for example a net, onto a ceiling formwork system (300) in order to produce a ceiling or a ceiling section in concrete construction, having a one-part or multipart spacer tube (110) for bridging the distance between two ceiling formwork system (300) supports (310) running parallel to each other and at least one connection assembly (120) for connecting the spacer tube (110) to one of the supports (310), said connection assembly (120) comprising: - a locking element (121) which can be brought into a locking engagement with a support (310) groove (311) formed with an undercut, - a bolt (122), in particular a threaded bolt, which is formed together with the locking element (121) as a single part or which is fixed to the locking element (121) for co-rotation, and - an actuation element (123) which is placed, in particular screwed, onto the bolt (122) or which is fixed to the bolt for co-rotation, for example in a welded manner, a riveted manner, using pins, or in a pressed manner. The invention additionally relates to a ceiling formwork system (300) comprising such a connection device (100) and to a method for producing a ceiling formwork comprising a securing device (200) using the connection device (100).

Description

Connection device, ceiling formwork system with connection device and method for producing ceiling formwork

The invention relates to a connection device for a safety device of a ceiling formwork system for producing a ceiling or a ceiling section in concrete construction. In addition, the invention relates to a ceiling formwork system for producing a ceiling or a ceiling section in concrete construction with such a connection device. In addition, a method for producing a ceiling formwork with a safety device using a connection device according to the invention is proposed.

Ceiling formwork systems include formwork panels that are laid next to each other on one level to form a level ceiling soffit. The installation takes place on supports that run parallel to each other, which in turn rest on ceiling supports. When laying, the formwork panels can be lifted in from below or placed on top. In order to place the formwork panels from above, at least one person must stand on the supporting structure or on an already laid formwork panel. This person can fall into a space left between two beams and fall. To prevent this from happening, the distance between the supports can be chosen to be correspondingly narrow.

Alternatively, a collecting device, for example in the form of a net or a grid, can be provided in the free space. The fall arrest device and the connection of the fall arrest device to the ceiling formwork system must be designed to withstand the load of a person falling into it. The load must also not cause the ceiling formwork system to collapse.

From WO 2019/069246 A1 a fall protection system for ceiling formwork is known, which includes spacer elements and a net that can be attached thereto. The spacer elements are arranged at a distance from each other transversely to two parallel supports, so that the spacer elements span the free space between the two supports. For this purpose, the spacer elements each have a bar element with bearing elements arranged at the ends. Holding elements for fastening the net are arranged on the bearing elements. In particular, two types of bearing elements for a spacer element emerge from WO 2019/069246 A1.

A first type is placed or plugged onto a support from above, so that the formwork panels no longer rest directly on the supports, but on the bearing elements resting thereon. This must be taken into account when setting the altitude. Since a bearing element resting or plugged onto the carrier remains displaceable relative to the carrier, fixing using additional fixing means, for example in the form of nails, is recommended to secure the position. The use of nails is recommended because in WO 2019/069246 A1 yoke wood is used as a support. However, the additional fixation with the help of nails makes it more difficult to dismantle the ceiling formwork system after the ceiling or ceiling section has been completed.

A second type has a base plate with a central rod bushing. The bearing element is placed on a ceiling support via the base plate and fixed in position with the help of a rod stub that extends through the rod bushing. The rod stub is preferably arranged on a fork element which serves to hold a yoke and is connected to the ceiling support via the rod stub. The base plate of the bearing element thus comes to lie between the ceiling support and the fork element, so that here too the bearing element influences the height of the formwork panels.

The present invention is concerned with the task of simplifying the assembly and/or disassembly of a safety device, in particular a collecting device, of a ceiling formwork system. In addition, the connection of the safety device to a component of the ceiling formwork system should enable safe load transfer via the ceiling system in the event of a load.

To solve the problem, the connection device with the features of claim 1 and the ceiling formwork system with the features of claim 12 are proposed. Advantageous developments of the invention can be found in the respective subclaims. Furthermore, a method for producing a ceiling formwork with a safety device using a connection device according to the invention is specified. Disclosure of the invention

What is proposed is a connection device for connecting a safety device, for example a network, to a ceiling formwork system for producing a ceiling or a ceiling section in concrete construction, comprising a one-piece or multi-part spacer tube for bridging a distance between two parallel supports of the ceiling formwork system and at least one connection assembly Connecting the spacer tube to one of the supports. The connection assembly comprises: a locking element that can be brought into locking engagement with an undercut groove of the carrier, a bolt, in particular a threaded bolt, which is formed in one piece with the locking element or is connected to the locking element in a rotationally fixed manner, and an actuating element which is located on the Bolt is placed, in particular screwed on, or connected to the bolt in a rotationally fixed manner, for example welded, riveted, pinned or pressed.

The locking element, which can be brought into engagement with an undercut groove in the carrier, enables a positive connection and thus a secure connection of the connection assembly to the carrier of the ceiling formwork system. To produce the positive connection, the locking element is inserted into the groove in a first angular position with respect to the carrier, then rotated and brought into a second angular position in which it engages behind the undercut groove of the carrier. In the second angular position, the locking element is therefore secured against slipping out of the groove.

The rotation of the locking element in order to bring it from the first angular position into the second angular position is preferably a rotation of 90° and/or takes place about a longitudinal axis A of the bolt, which runs perpendicular to a longitudinal axis B of the locking element.

If the locking element is brought into locking engagement with the undercut groove of the carrier, a clamping force can additionally be exerted on a section of the carrier delimiting the groove with the aid of the actuating element placed, in particular screwed, onto the bolt. The actuating element is used for this purpose preferably further screwed onto the bolt, so that the actuating element comes to rest directly or indirectly on said section of the carrier. The tightening torque determines the clamping force.

The connection assembly of the proposed connection device therefore not only enables a positive connection to a carrier, but also - via the clamp connection - a non-positive connection. The position of the connection assembly on the carrier is therefore secured in several ways. The multi-stage position securing prevents the safety device from collapsing under load or in the event of a load, as the load is safely transferred via the ceiling formwork system.

The connection assembly of the proposed connection device can also be easily assembled and dismantled again if necessary, since all connections are detachable. Assembly and disassembly can also be carried out largely without tools. An impact tool, such as a hammer, may be required.

The advantages of the proposed connection device are particularly evident in connection with a support of a ceiling formwork system, which has at least one undercut groove on an underside, the underside being the side facing downwards in the final installation position of the support. The connection assembly of the proposed connection device is attached to the underside of the carrier in such a way that the locking element comes into engagement with the groove. The carrier can already assume its final installation position. Preferably, however, the connection assembly is first connected to the carrier and then the carrier is lifted and/or pivoted into the final installation position.

According to a first preferred embodiment of the invention, the spacer tube is plugged onto the bolt between the locking element and the actuating element. This means that when producing the clamp connection, the actuating element only comes into contact with the carrier indirectly via the spacer tube. If necessary, a washer can be arranged between the distance tube and the actuating element, via which the clamping force is evenly transmitted to the distance tube.

According to a further preferred embodiment of the invention, a receptacle for the spacer tube is placed on the bolt between the locking element and the actuating element. In this embodiment too, the actuating element comes into contact with the carrier only indirectly via the receptacle. If necessary, one can again Washer can be arranged between the receptacle and the actuating element to ensure uniform power transmission. The receptacle has the advantage that first the connection assembly and then the distance tube can be mounted, with the distance tube only having to be inserted into the receptacle.

In a further development of this embodiment, it is proposed that the receptacle for the spacer tube to rest on the carrier is essentially plate-shaped and has at least one upstand which encompasses the carrier and/or engages in the groove of the carrier. The position of the receptacle relative to the carrier can be secured via the at least one upstand which surrounds the carrier and/or engages in the groove of the carrier. If at least two upstands are provided, an anti-twist device, i.e. securing the angular position of the receptacle in relation to the carrier, can also be effected.

Furthermore, it is proposed that the receptacle has at least one pin that can be brought into engagement with a recess in the spacer tube. With the help of the pin, a positive connection can be achieved between the spacer tube and the receptacle, which secures the position of the spacer tube after it has been inserted into the receptacle.

Furthermore, at least one hook- and/or eyelet-like connection element for connecting the safety device is preferably arranged on the distance tube or on the receptacle for the distance tube. In order to connect the safety device, which can in particular be a network, in this case the safety device only needs to be hooked into the hook- and/or eyelet-like connection element. The safety device can therefore be easily installed and dismantled again if necessary.

The holder for the distance tube can protrude over the support on both sides and form support surfaces for two distance tubes. In this way, the number of connection modules can be reduced. This advantage comes into play in particular when the safety device extends over at least two fields of the ceiling formwork system that are separated by a support.

The locking element of the connection assembly that can be brought into engagement with the undercut groove of the carrier can have a flat, wedge-shaped, spherical or round clamping surface. An even distribution of the clamping force can be achieved via a flat clamping surface. Via a wedge-shaped, spherical or round design Clamping surface can achieve a self-clamping effect when screwing the locking element into the locking position, since the locking element is simultaneously displaced or raised in the axial direction when screwed in. The flat, wedge-shaped, spherical or round clamping surface is preferably formed on the side of the locking element facing the actuating element.

If the locking element and the bolt are made in one piece, they can be formed by a grooved screw. In this case, the locking element is realized by a screw head of the grooved screw, which is not designed to be rotationally symmetrical, so that it has different widths, and - depending on the angular position of the grooved screw in relation to the groove of the carrier receiving the locking element - can be inserted into the groove or removable from the groove or in locking engagement with the groove. Alternatively, the groove screw can also be inserted or pushed into the groove laterally from an end face of the carrier. In this case, the screw head can have an excess dimension compared to the groove opening in any angular position and can therefore also be designed to be rotationally symmetrical.

In addition, the locking element can be a pin running transversely to the bolt or a sliding block placed on the bolt. In this case, the locking element and the bolt are manufactured separately and subsequently connected to each other. In the pin version, a locking element with a round clamping surface can be easily produced. In the version as a slot block, the clamping surface can be designed as desired.

As a further development measure, it is proposed that the bolt has an end section that accommodates the locking element, which projects beyond the locking element and can be brought into engagement with a recess in the carrier, which is formed in an inner wall delimiting the groove of the carrier. This measure creates an additional positive connection between the bolt and the carrier. This additional form fit can in particular prevent the connection assembly from shifting relative to the carrier in the longitudinal direction of the carrier. This is because the undercut groove of the carrier that accommodates the locking element is preferably designed as a longitudinal groove that extends over at least part of the length of the carrier, so that without the additional positive fit, only the clamping fit of the connection assembly counteracts a displacement in the longitudinal direction of the carrier. The additional positive fit can therefore further increase the load capacity of the safety device. The recess receiving the end section of the bolt is preferably formed in an inner wall of the carrier that delimits the groove and is opposite the opening of the groove. When the locking element is inserted into the groove, the end section of the bolt can also be inserted into the recess. Furthermore, the length of the recess is limited in order to achieve the additional positive fit. The length can be dimensioned such that only one bolt of a connection assembly can be inserted, so that it is secured against displacement in the longitudinal direction of the carrier. However, the length can also be dimensioned such that the bolts of two adjacent connection assemblies can be inserted into the recess and secured against longitudinal displacement. Due to the limited length of the recess, the installation position of the connection module or the connection modules is also precisely specified.

The actuating element of the connection assembly of the proposed connection device can in particular comprise a wing nut, a cam nut, a strike plate with a threaded hole and/or a lever. The actuating element is preferably screwed onto the bolt, which is designed as a threaded bolt for this purpose. The actuation of the actuating element therefore leads to a longitudinal displacement of the actuating element in the direction of the longitudinal axis of the bolt or threaded bolt. In this way, the clamping force required for the clamping connection between the connection assembly and the carrier can be achieved. The actuating element is therefore preferably provided with an internal thread that corresponds to the external thread of the threaded bolt. Furthermore, at least one lever or lever arm is preferably provided on the actuating element in order to be able to apply a larger torque or tightening torque via the lever effect. The lever or lever arm also makes it easier to loosen the clamp seat. For example, the lever arm can be hit with a striking tool, in particular a hammer.

Alternatively, the actuating element can be connected to the bolt in a rotationally fixed manner, for example welded, riveted, pinned or pressed, so that the bolt can be designed without a thread. The clamping effect is then achieved by rotating the locking element, which has a non-flat clamping surface for this purpose. The rotation of the locking element is achieved via an actuation of the actuation element, in particular a rotation of the actuation element. In this case, the actuating element can in particular be designed as a lever connected to the bolt in a rotationally fixed manner. According to a preferred embodiment of the invention, the actuating element is operatively connected to a locking device, which comprises a preferably spring-loaded locking element which can be brought into engagement with a recess. A specific end position of the actuating element can be specified via the locking device. Furthermore, the actuating element can be secured in the predetermined end position with the help of the locking device. If the locking element is spring-loaded, it is preferably pressed into the recess by means of spring force when the actuating element has assumed a certain angular position. To release the locking device, the locking element simply needs to be pulled out of the recess against the spring force. This can easily be done manually and without tools.

The operative connection between the actuating element and the locking device can in particular be such that the locking device is pivotally mounted about the longitudinal axis A of the bolt via the actuating element. When the actuating element is actuated, the locking device is activated at the same time.

The additionally proposed ceiling formwork system for producing a ceiling or a ceiling section in concrete construction comprises: at least one support with an underside and an undercut groove formed on the underside and at least one connection device according to the invention for connecting a safety device, for example a network.

When assembling the ceiling formwork system, the connection device is connected to the support via its connection assembly. Since the undercut groove of the carrier intended for connection is provided on its underside, the connection assembly can simply be attached from below when the carrier is already installed. However, the connection assembly is preferably first connected to the carrier and then the carrier is brought into its final installation position, for example by pivoting in. This makes assembly of the connection device easier. The safety device can also be installed before swinging in. Workers who then insert the formwork panels of the ceiling formwork system from above are protected from falling because there is no longer a free edge to fall. At the same time are Workers on the level below are protected from falling objects by the safety device.

After the ceiling formwork system has been installed, the connection device according to the invention is therefore connected to at least one support of the system, the connection being established via a connection assembly of the connection device, in particular via a locking element of the connection assembly that engages in the groove of the support. The locking element creates a positive connection between the connection assembly and the carrier, which prevents the locking element from falling out of the groove and thus prevents the connection assembly or the connection device from falling down. By actuating the actuating element, a clamping fit can be achieved at the same time, which in particular prevents displacement of the connection assembly or the connection device in the longitudinal direction of the carrier.

Depending on the design of the connection assembly, a further positive connection can be effected between an end section of the bolt received in the carrier and a recess in the carrier, which is advantageously formed in an inner wall of the carrier that delimits the groove and is opposite the groove opening. Advantageously, the end portion of the bolt projects beyond the locking element, so that when the locking element is inserted into the groove, the end portion of the threaded bolt is simultaneously inserted into the recess of the carrier. To achieve positive locking, the recess for receiving the bolt has a limited length compared to the groove. The length is preferably selected so that only one bolt or only the bolts of two adjacent connection assemblies can be used.

The connection device is only held at one end via the connection assembly connected to the carrier. The other end is therefore preferably connected to another carrier via a further connection assembly. The connection device is then preferably arranged between two parallel supports and is connected to each of them via a connection assembly. The spacer tube between the two connection assemblies is tailored to the distance between the supports. The spacer tube therefore also has a stiffening effect. The distance tube is always correctly aligned due to the distance between the two supports. If the spacer tube is designed in several parts, the parts can preferably be pushed together and pulled apart telescopically, so that - if the distance between the carriers varies - the length of the distance tube can be adjusted to the respective distance between the carriers. The connection of a security device, for example a network, usually requires more than just one connection device. At least two connection devices are therefore preferably arranged at a distance from one another between parallel supports of the ceiling formwork system. The safety device can then be hung between these. For this purpose, each connection device preferably has at least two hook- and/or eyelet-like connection elements. These are each arranged in an end region of the connection device, for example on the distance tube or on a receptacle for the distance tube.

The connecting devices arranged between parallel supports form at least one rectangular field together with the supports. If more than two connection devices are mounted at a distance from each other between parallel beams, several rectangular fields lie next to each other. The safety device can extend over just one field or over several fields, provided that it is long enough.

Two fields can be separated from each other by one beam, two beams or a “split beam”.

When separated by a carrier with a groove on the bottom, a connection assembly can be mounted on this carrier, which is connected or connectable to a spacer tube of a connecting device on both sides of the carrier. Alternatively, two connection assemblies can be mounted one behind the other, i.e. offset from one another, on the carrier, each of which is connected or can be connected to a spacer tube.

If the fields are separated by two supports that are arranged next to one another, a connection assembly of a connection device can be mounted on each support so that the spacer tubes can be arranged without being offset from one another.

If the fields are separated by a “split carrier”, a separate second carrier is not required, so only one carrier is required. However, this can be divided lengthwise into two equal halves so that each half delimits one field. The halves can be assembled separately from each other so that assembly only takes place when the respective field is assembled. Each half of the “split carrier” can also be connected to a connection assembly of a connection device according to the invention. The “divided carrier” has two parallel beams on its underside undercut grooves so that a locking element of a connection assembly can be inserted into each groove. The split carrier is slightly wider than the carrier with just one groove.

In addition, a method for producing a ceiling formwork with a safety device using a connection device according to the invention is proposed. The procedure includes the steps:

Erecting a supporting structure with several ceiling supports,

Connecting a first end of a first beam to the support structure, connecting a first end of a second beam to the support structure so that both beams are aligned parallel to one another at a distance from one another,

Connecting the connection device to the two carriers, preferably in the area of a second end of the respective carrier,

Connecting the safety device to the connection device and pivoting the carrier into its final installation position before or after connecting the safety device to the connection device.

The method has the advantage that the connection device can be mounted from below, that is, from a safe level, so that there is no risk of falling when installing the connection device. The same applies to connecting the safety device to the connection device. After assembly, the safety device protects the workers. People who are on the slab formwork are protected against falling. People underneath are protected from falling objects.

Preferred embodiments of the invention are explained in more detail below with reference to the accompanying drawings. These show:

1 is a perspective view of a first preferred embodiment of a connection device according to the invention for a safety device,

Fig. 2 is a perspective view of a connection assembly

Connection device of Figure 1, 3a-3c each show a sectional view of the connection assembly

1 during assembly on a support of a ceiling formwork system,

4 is a perspective view of a connection assembly of a second preferred embodiment of a connection device according to the invention,

5a-5c each show a sectional view of the connection assembly of FIG. 4 during assembly on a support of a ceiling formwork system,

6 is a sectional view of the assembled connection assembly of FIG. 4 including the spacer tube,

7 is a sectional view of the assembled connection assembly of FIG. 4 including two spacer tubes,

8 is a perspective view of a connection assembly of a third preferred embodiment of a connection device according to the invention,

9a-9c each show a sectional view of the connection assembly of FIG. 8 during assembly on a support of a ceiling formwork system,

10 is a perspective view of a connection assembly of a fourth preferred embodiment of a connection device according to the invention,

11a-11c each show a sectional view of the connection assembly of FIG. 8 during assembly on a support of a ceiling formwork system,

12 shows a perspective view of a fifth preferred embodiment of a connection device according to the invention for a safety device,

13 is a side view of the connection device of FIG. 12,

14 shows a further side view of the connection device of FIG. 12, but rotated by 90°,

15 shows a longitudinal section through the connection device of FIG. 12, 16 is a perspective view of a sixth preferred embodiment of a connection device according to the invention for a security device,

17 is a perspective view of a connection assembly of the connection device of FIG. 16,

18 is a top view from below of the connection assembly of the connection device of FIG. 16 during assembly,

19 is a top view from below of the connection assembly of the connection device of FIG. 16 after assembly,

20 is a perspective view of the connection assembly of the connection device of FIG. 16 during assembly,

21 is a perspective view of the connection assembly of the connection device of FIG. 16 after assembly,

22 shows a longitudinal section through the connection assembly of the connection device of FIG. 16 after assembly,

23 is a plan view of the underside of a support of a ceiling formwork system with two mounted connection assemblies of two connection devices according to FIG. 16,

24 is a perspective view of a support of a ceiling formwork system,

25 shows a cross section through the carrier of FIG. 24,

26 shows a perspective view of a ceiling formwork system with a safety device during the assembly of a connection device according to the invention, 27 is a perspective view of the ceiling formwork system of FIG. 26 during a further assembly step,

28 is a perspective view of the ceiling formwork system of FIG. 26 after the safety device has been connected,

Fig. 29 shows a cross section through a divided support for a ceiling formwork system and

Fig. 30 is a perspective view of a ceiling formwork system with the support of Figure 29.

Detailed description of the drawings

Figures 1 to 3 show a first preferred embodiment of a connection device 100 according to the invention. This comprises a spacer tube 110 and two connection assemblies 120, each of which is connected to one end of the distance tube 110. In the present case, the distance tube 110 has a rectangular cross section and two hook- or eye-like connection elements 116 for connecting a safety device 200.

As can be seen in particular from FIG. 2, a connection assembly 120 of the connection device 100 according to FIG. 1 has a locking element 121 which is connected in a rotationally fixed manner to a bolt 122 in the form of a threaded bolt. This is guided through a through hole in the spacer tube 110, so that the locking element 121 comes to rest above the distance tube 110, with an end section 125 of the bolt 122 still projecting beyond the locking element 121. On the underside of the spacer tube 110, an actuating element 123 is screwed onto the bolt 122, with a washer 128 being inserted between the actuating element 123 and the spacer tube 110.

The assembly of the connection device 100 will be explained below with reference to Figures 3a to 3c. For assembly, a ceiling formwork system 300 with a support 310 is required, which has an undercut groove 311 on its underside. Such a carrier 310 is shown as an example in FIGS. 24 and 25. When assembling the connection device 100, a connection assembly 120 with the locking element 121 or the end section 125 of the bolt 122 in advance is inserted into the groove 311 of the carrier 310. The groove 311 is delimited on the inside by an inner wall 313 of the carrier 310, in which a recess 312 is formed (see Figures 24 and 25). The end section 125 of the bolt 122 which projects beyond the locking element 121 is inserted into this recess 312 until the locking element 121 is completely received in the groove 311 (see Figure 3a).

The insertion of the locking element 121 into the groove 311 requires a certain angular position of the locking element 121, since the locking element 121 in the present case is designed as a sliding block that can be brought into locking engagement with the groove 311 and has a length that is oversized compared to the opening of the groove 311 . The width of the sliding block, on the other hand, is chosen to be smaller than the opening of the groove 311, so that the locking element 121 can be inserted into the groove 311 when the longitudinal axis B of the locking element 121 is aligned parallel to the carrier 310 or to the groove 311.

After inserting the locking element 121 into the groove 311, the locking element 121 is rotated through 90° so that the longitudinal axis B runs transversely to the longitudinal direction of the carrier 310 (see Figure 3b). The locking element 121 is brought into locking engagement with the groove 311 in this way. The actuating element 123 is then further screwed on or tightened so that the spacer tube 110 comes into contact with the carrier 310 (see Figure 3c). By further tightening, the carrier 310 can be clamped between the locking element 121 and the spacer tube 110. For this purpose, the locking element 121 has a clamping surface 124, which in the present case is designed to be flat.

In the exemplary embodiment of FIGS. 1 to 3, the actuating element 123 is designed as a striking plate with a threaded hole. A striking tool can be attached to the lever arms of the striking plate in order to achieve greater tightening force via the leverage effect. Similarly, the clamp fit can be loosened using an impact tool.

A second preferred embodiment of a connection device 100 according to the invention can be seen from FIGS. 4 to 7. In contrast to the previously described embodiment, the spacer tube 110 is not connected directly to a connection assembly 120, but rather indirectly via a receptacle 111. The receptacle 111 is essentially plate-shaped and has support surfaces 117 for placing at least one spacer tube 110. A positive connection can be established between the spacer tube 110 and the receptacle 111 via recesses 119, which prevents that the placed spacer tube 110 falls down. In addition, the receptacle 111 has lateral upstands 112, 113, which enable the receptacle 111 to form a positive connection with the carrier 310. The bolt 122 holding the locking element 121 is guided centrally through the receptacle 111. Below the receptacle 111, the actuating element 123 is screwed onto the bolt 122, with a washer 128 also being inserted between the receptacle 111 and the actuating element 123.

When assembling the connection assembly 120, the locking element 121 and the receptacle 111 are first aligned with one another in the manner shown in FIG. 4 and then attached to the carrier 310 from below, so that the longitudinal axis B of the locking element 121 is parallel to the carrier 310 or to Groove 311 is aligned (see Figure 5a). When the locking element 121 is inserted into the groove 311, the upstands 113 of the receptacle 111 are simultaneously brought into engagement with the groove 311. The upstands 112 come to rest on both sides of the carrier 310, so that the receptacle 111 surrounds the carrier 310 on both sides. In this position, the receptacle 111 is secured against rotation by the upstands 112, 113. The locking element 121 is then rotated through 90° so that it comes into locking engagement with the groove 311 (see Figure 5b). By further screwing or tightening the actuating element 123, an additional clamping force is applied, so that the carrier 310 is clamped between the locking element 121 and the receptacle 111 (see Figure 5c).

After mounting the connection assembly 120, the spacer tube 110 can be inserted into the receptacle 111. To produce the positive connection between the spacer tube 110 and the receptacle 111, the spacer tube 110 has a correspondingly shaped end section which can be brought into engagement with the recesses 119 of the receptacle 111 (see Figure 6). Since the receptacle 111 surrounds the carrier 310 on both sides and forms a further support surface 117 for another spacer tube 110, two spacer tubes 110 can also be inserted into the receptacle 111 - as shown by way of example in FIG.

A third preferred embodiment of a connection device 100 according to the invention is shown in Figures 8 and 9a to 9c. This has a receptacle 111 analogous to the previously described embodiment, so that it is also suitable for receiving two spacer tubes 110. In contrast to the previously described embodiment, in this embodiment the locking element 121 and the bolt 122 are designed in one piece as a grooved screw. A wing nut is screwed onto the grooved screw as an actuating element 123. During assembly, the screw head of the grooved screw, which forms the locking element 121, is inserted or pushed into the groove 311 of the carrier 310 from the side. This is because the screw head has an excess dimension compared to the opening of the groove 311 in every angular position. Lateral flats of the screw head rest on the groove flanks, so that this prevents rotation (see Figure 9a). After inserting the locking element 121 or the grooved screw, the receptacle 111 is pushed from below against the carrier 310, so that the upstands 113 engage in the groove 311 and the upstands 112 surround the carrier 310 on both sides. The position of the receptacle 111 is secured by means of the actuating element 123 in the form of the wing screw by screwing it on further (see Figure 9b). A clamping effect can also be achieved using the tightening force of the wing screw.

After mounting the connection assembly 120, the spacer tube 110 can be inserted into the receptacle 111 (see Figure 9c). If necessary, a second spacer tube 110 can also be inserted analogously to FIG.

A fourth embodiment of a connection device 100 according to the invention is described below with reference to FIGS. 10 and 11. Analogous to the exemplary embodiment described above, the connection assembly 120 has a grooved screw which forms the locking element 121 and the bolt 122, as well as a receptacle 111 for receiving at least one spacer tube 110. The receptacle 111 is in turn designed in the shape of a plate and has an upstand 113 for insertion into the Groove 311 of the carrier 310 and upstands 112, which - after assembly - surround the carrier 310 on both sides, so that this prevents rotation. Instead of recesses 119, the receptacle 111 has two pins 115 for a positive connection to two spacer tubes 110. Corresponding recesses 114 are formed in the spacer tubes 110 (see Figure 11c).

In contrast to the previous embodiments, the hook- and/or eye-like connection element 116 for connecting the safety device 200 is not arranged on the distance tube 110, but on the receptacle 111. Since two spacer tubes 110 can be inserted into the support 111, two connecting elements 116 are also provided.

During assembly, the locking element 121 or the screw head of the grooved screw is inserted or pushed into the groove 311 of the carrier 310 from the side (see Figure 11a). The receptacle 111 is then pushed from below onto the carrier 310 so that the upstand 113 engages in the groove 311 and the upstands 112 engage the carrier 310 on both sides embrace. To fix the receptacle 111, the actuating element 123 is further screwed onto the bolt 122 or the grooved screw. At the same time, a clamping force can be caused via the actuating element 123, so that the carrier 310 is clamped between the locking element 121 or the screw head of the grooved screw and the receptacle 111 (see Figure 11 b). After mounting the connection assembly 120, a spacer tube 110 can be inserted on both sides of the carrier 310 so that the pins 115 engage in the recess 114 of the respective spacer tube 110. Figure 11 c shows an example of the connection assembly 120 with an inserted spacer tube 110.

A fifth preferred embodiment of a connection device 100 according to the invention can be seen in FIGS. 12 to 15. In this embodiment, the distance tube 110 - analogous to the embodiment of Figures 1 to 3 - is connected directly to the connection assemblies 120. For this purpose, the bolts 122 of the connection assemblies 120 are each guided through a through hole in the spacer tube 110. The spacer tube 110 also has two hook- and/or eye-like connection elements 116 for connecting the safety device 200.

The connection assemblies 120 each have a bolt 122 and a locking element 121 in the form of a pin running transversely to the bolt 122, with end sections 125 of the bolts 122 each projecting beyond the locking element 121. An actuating element 123 in the form of a lever is placed at the other end of the bolts 122 and is connected to the respective bolt 122 in a rotationally fixed manner. By actuating the actuating element 123, the pin-shaped locking element 121 can therefore be rotated so that it can be inserted into the groove 311 of the carrier 310 in a first angular position and in locking engagement with the in a second angular position, namely offset by 90 ° to the first angular position Groove 311 can be brought. The rotatability of the bolt 122 and thus of the locking element 121 and the actuating element 123 can be limited via a pin-shaped stop element 129 arranged on the bolt 122, which cooperates with a stop 130 which is formed by a sleeve 131 surrounding the bolt 122. Reaching the stop 130 also indicates that the locking element 121 is in locking engagement with the groove 311.

As can be seen in particular from Figures 14 and 15, when locking, a round clamping surface 124 of the pin-shaped locking element 121 is screwed into the groove 311 in such a way that the locking element 121, the bolt 122 and the actuating element 123 are slightly raised. In this way, a clamping force acting on the carrier 310 is achieved. In the exemplary embodiment of Figures 12 to 15, the actuating element 123 is also operatively connected to a locking device 126 arranged eccentrically with respect to the longitudinal axis A of the bolt 122. By actuating the actuating element 123 or the lever, the locking device 126 is pivoted so that a spring-loaded locking element 127 of the locking device 126 can be brought into engagement with a recess 118 of the spacer tube 110. This mechanism is described below in connection with a sixth preferred embodiment of a connection device 100 according to the invention, which is shown in FIGS. 16 to 23.

Figure 16 shows the entire connection device 100, which has a multi-part spacer tube 110 and two connection assemblies 120. The multi-part design of the spacer tube 110 has the advantage that the length of the connecting device 100 is adjustable. The connection assemblies 120 are each firmly connected to a part of the spacer tube 110.

17 shows a connection assembly 120 of the connection device 100 of FIG. The actuating element 123 is designed as a lever which is connected to the bolt 122 in a rotationally fixed manner. The actuating element 123 is also operatively connected to a locking device 126 arranged eccentrically with respect to the longitudinal axis A of the bolt 122. In addition, the connection assembly 120 has a bent sheet metal 132, which forms a stop 133 for the actuating element 123 (see also Figures 18 and 19). The sheet metal 132 thus replaces the sleeve 132 of the previously described embodiment.

When assembling the connection assembly 120, it is attached to the carrier 310 from below with the end section 125 of the bolt 122 and the locking element 121 in advance, so that the end section 125 engages with the recess 312 in the inner wall 313 of the carrier 310 and the locking element 121 come into engagement with the groove 311. The locking element 121 assumes an angular position in which its longitudinal axis B is aligned parallel to the carrier 310 or to the groove 311 (see Figure 20). By actuating the actuating element 123, the locking element 121 is then brought into locking engagement with the groove 311 by pivoting the actuating element 123 through 90 ° in the direction of the sheet metal 132 (see Figure 21). The actuating element 123 comes into contact with the stop 133 of the sheet metal 132 (see also Figures 18 and 19). With the When the actuating element 123 is actuated, the locking device 126 is simultaneously pivoted, so that in the end position of the actuating element 123 at the stop 133, the spring-loaded locking element 127 comes into engagement with the recess 118 formed in the spacer tube 110 (see Figure 22 and Figures 18 and 19). The locking device 126 thus prevents the actuating element 123 or the lever from being actuated and the locking element 121 from being moved into an angular position in which it falls out of the groove 311. The locking device 126 therefore serves to secure the position of the connection module 120.

When dismantling the connection device 100 or the connection assembly 120, only the spring-loaded locking element 127 has to be pulled out of the recess 118 against the spring force and the lever has to be pivoted back. The locking element 121 then assumes an angular position in which it can easily be removed from the groove 311 of the carrier 310.

As shown by way of example in FIG. 23, two connecting devices 100 can be mounted on a carrier 310 offset from one another in the longitudinal direction of the carrier 310. In order to keep the offset as small as possible, the sheets 132 have sloping edges 134. The small offset ensures that the end sections 125 of the bolts 122 each come into engagement with the recess 312 of the inner wall 313 of the carrier 310. Because the length of the recess 312 is limited (see Figures 24 and 25).

The preferred embodiments of a connection device 100 according to the invention described with reference to FIGS. 1 to 25 are preferably assembled or erected together with a ceiling formwork system 300. A possible process is shown in Figures 26 to 28.

The ceiling formwork system 300 shown includes a support structure 320 made up of several ceiling supports 321, which are set up at a distance from one another, so that four ceiling supports 321 each define a ceiling field. Carriers 310 are placed on the support structure 320 so that they run parallel and laterally limit the ceiling field. Formwork panels 330 are already placed on the supports 310 of a first ceiling field, so that this ceiling field is closed. The supports 310 of the next ceiling field are already hooked into the support structure 320 at one end, so that they simply hang down at the other end. Before these are pivoted into their final installation position, a connection device 100 according to the invention is used for one Safety device 200 mounted in the form of a net. For this purpose, the connection assemblies 120 of the connection device 100 are each connected to a carrier 310, with a locking element 121 of the respective connection assembly 120 being brought into locking engagement with an undercut groove 311 of the respective carrier 310. In addition, a clamping connection between the connection assembly 120 and the carrier 310 is achieved by actuating an actuating element 123. Since the supports 310 of the ceiling field to be constructed are only hooked into the support structure 320 at one end, the connection device 100 can be easily installed from below (see Figure 26). After the connection device 100 has been installed, it can be pivoted together with the supports 310 into the final installation position (see Figure 27). The safety device 200 can be connected before pivoting or after. The latter is recommended if the safety device is a net that is stretched across several ceiling panels (see Figure 28). Alternatively, a separate net can be used for each ceiling panel.

As an alternative to a carrier 310 with only one groove 311, a carrier 310 with two grooves 311 can also be used. Such a carrier 310, also called a “split carrier,” is shown as an example in FIG. 29. The double groove offers connection options for two connection assemblies 120, which can be arranged in such a way that the spacer tubes 110 connected to the connection assemblies 120 come to lie next to one another and not - as shown in Figure 23 - offset from one another. In addition, the carrier 310 can be divided lengthwise into two halves, which can be mounted separately from one another.

As shown by way of example in FIG. 30, with the help of the ceiling formwork system 300, several fields can be formed in one plane, both next to one another and one behind the other. The fields are separated from each other by supports 310, which are designed here as “split supports”. This means that the supports 310 can each be divided into two halves, which can then be assembled field by field, that is, separately from one another. Each half of a divided carrier 310 has an undercut groove 311 on the underside for connection to a connection assembly 120 of a connection device 100. After the two halves have been pivoted into their respective end positions, the spacer tubes 110 of the two connecting devices 100 come to lie next to one another without being offset. Reference symbol list

100 connection device

110 spacer tube

111 recording

112 backsplash

113 backsplash

114 recess

115 cones

116 connection element

117 support surface

118 recess

119 recess

120 connection assembly

121 locking element

122 bolts

123 actuator

124 clamping surface

125 End section of the bolt 122

126 locking device

127 locking element

128 washer

129 stop element

130 stroke

131 sleeve

132 sheet metal

133 stop

134 edge

200 security device

300 ceiling formwork system 310 carriers

311 groove

312 recess

313 Interior wall 320 Support structure

321 ceiling support

330 formwork panel

Claims

Patent claims

1 . Connection device (100) for connecting a safety device (200), for example a network, to a ceiling formwork system (300) for producing a ceiling or a ceiling section in concrete construction, comprising a one- or multi-part spacer tube (110) for bridging a distance between two parallel extending supports (310) of the ceiling formwork system (300) and at least one connection assembly (120) for connecting the spacer tube (110) to one of the supports (310), the connection assembly (120) comprising: a locking element (121) which is in locking engagement with an undercut groove (311) of the carrier (310), a bolt (122), in particular a threaded bolt, which is formed in one piece with the locking element (121) or is non-rotatably connected to the locking element (121), and an actuating element ( 123), which is placed on the bolt (122), in particular screwed on, or connected to the bolt in a rotationally fixed manner, for example welded, riveted, pinned or pressed.

2. Connection device (100) according to claim 1, characterized in that between the locking element (121) and the actuating element (123) the spacer tube (110) or a receptacle (111) for the distance tube (110) is plugged onto the bolt (122). is, wherein preferably the receptacle (111) is essentially plate-shaped for contact with the carrier (310) and has at least one upstand (112, 113) which surrounds the carrier (310) and/or engages in the groove of the carrier (310).

3. Connection device (100) according to claim 2, characterized in that the receptacle (111) has at least one pin (115) which can be brought into engagement with a recess (114) in the spacer tube (110).

4. Connection device (100) according to one of the preceding claims, characterized in that on the distance tube (110) or on the receptacle (111) for the distance tube (110) at least one hook- and / or eye-like connection element (116) for connecting the Safety device (200) is arranged.

5. Connection device (100) according to one of claims 2 to 3, characterized in that the receptacle (111) projects beyond the carrier (310) on both sides and forms support surfaces (117) for two spacer tubes (110).

6. Connection device (100) according to one of the preceding claims, characterized in that the locking element (121) has a flat, wedge-shaped, spherical or round clamping surface (124).

7. Connection device (100) according to one of the preceding claims, characterized in that the locking element (121) is a pin running transversely to the bolt (122) or a sliding block placed on the bolt (122).

8. Connection device (100) according to one of the preceding claims, characterized in that the bolt (122) has an end section (125) which accommodates the locking element (121), which projects beyond the locking element (121) and engages with a recess (312). of the carrier (310), which is formed in an inner wall (313) delimiting the groove (311) of the carrier (310).

9. Connection device (100) according to one of the preceding claims, characterized in that the actuating element (123) comprises a wing nut, a cam nut, a striking plate with a threaded hole and / or a lever.

10. Connection device (100) according to one of the preceding claims, characterized in that the actuating element (123) is operatively connected to a locking device (126) which comprises a preferably spring-loaded locking element (127) which can be brought into engagement with a recess (118).

11. Connection device (100) according to one of the preceding claims, characterized in that the locking device (126) is pivotally mounted about a longitudinal axis (A) of the bolt (122) via the actuating element (123).

12. Ceiling formwork system (300) for producing a ceiling or a ceiling section in concrete construction, comprising at least one support (310) with a bottom (313) and an undercut groove (311) formed on the bottom (313) and at least one connecting device ( 100) according to one of the preceding claims for the connection of a security device (200), for example a network.

13. Ceiling formwork system (300) according to claim 12, characterized in that the connection device (100) is connected to at least one support (310), the connection being via a connection assembly (120) of the connection device (100), in particular via an in the groove (311) of the carrier (310) engaging locking element (121) of the connection assembly (120) is produced.

14. Ceiling formwork system (300) according to claim 12 or 13, characterized in that the connecting device (100) is arranged between two parallel supports (310) and is connected to each of them via a connection assembly (120).

15. Ceiling formwork system (300) according to one of claims 11 to 13, characterized in that at least two connecting devices (100) are arranged at a distance from one another between parallel supports (310) of the ceiling formwork system (300).

16. A method for producing a ceiling formwork with a safety device (200) using a connection device (100) according to one of claims 1 to 11, comprising the steps:

Erecting a support structure (320) with several ceiling supports (321), connecting a first end of a first support (310) to the support structure (320),

Connecting a first end of a second carrier (310) to the support structure (320), so that both carriers (310) are aligned parallel to one another at a distance from one another, connecting the connecting device (100) to the two carriers (310), preferably in the area of one second end of the respective carrier (310),

Connecting the safety device (200) to the connection device (100) and Pivoting the carrier (310) into its final installation position before or after connecting the safety device (200) to the connection device (100).