EP3686374B1 - Scaffolding element with a node point, construction scaffold comprising such a scaffolding element and method for producing a scaffolding element - Google Patents

Description

field of invention

The invention relates to a scaffolding element for scaffolding, the scaffolding element having a scaffolding tube with a node, a crossbar of the scaffolding element being connected to the scaffolding tube at the node, in particular via a bolt head of the crossbar, and/or a coupling point, e.g. B. in the form of a perforated disc, also called a rosette, is designed to connect such a crossbar. The invention further relates to scaffolding with such a scaffolding element and a method for producing a scaffolding element and a use.

Technical background

It is known to assemble scaffolding from scaffolding elements, the scaffolding elements each having a scaffold tube with at least one node. The load on the scaffolding element is particularly high in the area of the node. In the prior art, therefore, thick scaffold tubes and/or gusset plates are used in the area of the node.

A disadvantage of these known reinforcements of the nodal points is the associated high weight of the scaffolding element. Since scaffolding members are transported and assembled by hand, there is a strong need for weight reductions in scaffolding members.

From the DE 10 2016 204 696 A1 it is known to reinforce a scaffold tube at a node with a stiffening groove. This stiffening groove reinforces the scaffold tube in the area of a node.

From the DE 198 44 610 A1 a scaffolding tube with indentations to increase the load-bearing capacity is also known, the indentation running parallel to the central axis of the scaffolding tube.

From the AT 360 733 B scaffolding tubes emerge, which form plug and socket parts that can be connected to one another at the ends. The male and female parts each have at least one longitudinal groove formed by an inward deformation of the original tube.

Of the DE 295 00 479 U1 In addition, a hollow profile bar can be seen, which has a tubular profile with an approximately circular outline and T-slots that are open to the outside and are arranged over the circumference at equal circumferential distances from one another. The base of the T-slots is convex towards the middle of the profile.

summary

The object of the present invention is to create a scaffolding element that is particularly stable and lightweight and can also be manufactured inexpensively. A further object of the present invention is to provide a scaffolding with such a scaffolding element and to provide a method which enables such a scaffolding tube to be easily manufactured. In addition, a simple solution is to be created, such a light scaffolding tube from commercially available scaffolding tubes, e.g. B. round tubes, in order to make them easily recognizable and to avoid confusion.

The object is achieved by a scaffolding element having the features of independent claims 1, 10 and 14. The dependent claims and the exemplary embodiments described below specify expedient developments.

The object according to the invention is thus achieved by a scaffolding element with a scaffolding tube and a node. A crossbar of the scaffolding element can be connected to the scaffolding tube at the junction point. As an alternative or in addition to this, a coupling point for connecting a crossbar can be formed at the node. To stabilize the scaffolding tube in the area of the node, a first stiffening groove is provided, which extends parallel to a longitudinal axis of the scaffolding tube. The first stiffening groove reduces the inner diameter of the scaffold tube. The inner curvature of the first stiffening groove corresponds to the outer curvature of the scaffold tube.

The first stiffening groove is thus designed in the form of a depression in the scaffold tube. Such an indentation, also known as a bead, significantly increases the load-bearing capacity of the scaffold tube in the area of the node. As a result, the scaffold tube can be made thinner-walled, making it significantly lighter is transportable. The scaffold tube preferably has a wall thickness of 2 to 4 mm in the area of the node. Ideally, the wall thickness in the area of the node is 2 mm. The wall thickness of the scaffold tube preferably remains the same over its entire outside diameter.

The scaffolding tube is preferably in the form of a scaffolding post, i. H. for vertically aligned use.

In the case of scaffolding tubes that are customary on the market, especially standardized ones, various basic geometrical conditions must be observed, including a minimum wall thickness of 2.0 mm. In addition, a minimum wall thickness of 2.7 mm is prescribed for commercially available scaffolding tubes made of steel with an outside diameter of 48.3 mm in order to comply with standards. A minimum wall thickness of 3.0 mm is also required for commercially available scaffold tubes made of aluminum with an outside diameter of 48.3 mm in order to comply with standards.

By shaping the first stiffening groove, i. H. a concave depression in the scaffold tube in its longitudinal direction, with an inward curvature, as before convex outward, the scaffold tube is significantly strengthened. Because the outer curvature of the tube is reflected in the inner curvature of the bead, the result is an inner surface of the first stiffening groove that corresponds to the outer surface over the same outer circumference of the scaffolding tube. The outer circumference of a scaffold tube between 48 and 49 mm, preferably 48.3 mm, can thus be retained as the maximum outer radius and maximum outer dimension. At the points of the stiffening grooves, the external dimension is smaller.

The shape of the first stiffening groove, ie a concave indentation in the scaffolding tube in its longitudinal direction, with an inward curvature, as before convex outwards, makes the scaffolding tube clearly recognizable as a scaffolding tube that is not commercially available and therefore does not conform to the standard. As a result of this obvious distinction, compliance with the minimum wall thickness of 2.7 mm or 3.00 mm can be dispensed with. This gives you the freedom to reduce the wall thickness to approx. 2 mm for pipes with an outside diameter of 48.3 mm.

The first stiffening groove extends parallel to the central longitudinal axis of the scaffold tube. According to the invention, the size of the first stiffening groove is selected such that it occupies an area of the outer circumference of the scaffolding tube in the circumferential direction of the scaffolding tube, which corresponds to an angular range of between 20° and 40°, preferably 30°, in relation to the central longitudinal axis of the scaffolding tube. At the preferred 30°, this corresponds to one twelfth of the outer circumference of the scaffold tube. The angular range of 20° and 40°, preferably 30°, corresponds to a central angle in relation to the central longitudinal axis of the scaffold tube.

Choosing an angular range between 20° and 40°, preferably 30°, enables the arrangement of several such reinforcement grooves over the outer circumference of the scaffolding tube and thus an increased reinforcing effect of the scaffolding tube. According to the invention, the scaffold tube has a second stiffening groove parallel to the first stiffening groove in the area of the node. In the case of the second stiffening groove, too, the inner curvature of the second stiffening groove corresponds to the outer curvature of the scaffolding tube, i. H. Essentially, the convex shape of the scaffolding tube is deformed concavely inwards in the area of the second stiffening groove.

Furthermore, according to the invention, the second stiffening groove occupies a second area of the outer circumference of the scaffold tube, which corresponds to an angular range between 20° and 40°, preferably 30°.

In further embodiments of the present disclosure, the second stiffening groove is the same size as the first stiffening groove, ie the first area is the same size as the second area. In addition, the second stiffening groove can be designed in the same way as the first stiffening groove, in particular it can have the same shape. In particular, the second stiffening groove can be the same be designed as the first stiffening groove. This simplifies the manufacturing process.

Furthermore, according to the invention, the first area and the second area directly adjoin one another. The first and the second area thus together occupy an area of the outer circumference of the scaffolding tube which advantageously corresponds to between 40° and 80°, preferably 60°. According to the invention, the second stiffening groove then follows directly on from the first stiffening groove, which second stiffening groove is designed in the same way, in particular in the same shape or the same as the first stiffening groove. According to the invention, a piece of the scaffolding tube which is not concavely deformed but has the normal convex outer curvature of the scaffolding tube is then in turn adjoined to the second stiffening groove. In the preferred area size of approx. 30° each for the first and second area, an area of another 30° would then follow, which is not changed by a groove. Thus, in this embodiment, a quarter of the outer circumference of the scaffolding tube has the sequence of first stiffening groove, second stiffening groove and convex scaffolding tube. This symmetry preferably continues over the entire outer circumference of the scaffold tube. The scaffolding tube is particularly preferably designed to be axially symmetrical with respect to its central longitudinal axis. More preferably, the framework element is formed axially symmetrically to the longitudinal axis of the framework element.

In a preferred embodiment of the present disclosure there are then a total of eight stiffening grooves in the area of nodes on the outer circumference of the scaffolding tube, which preferably all eight are of the same type, in particular of the same shape or the same. These eight stiffening grooves advantageously make up between 50% and 80%, preferably two-thirds, of the outer circumference of the scaffolding tube.

The framework element can have several nodes. Reinforcement grooves are preferably of the same design in the area of a node. In a particularly preferred embodiment, the stiffening grooves of a framework are of the same design in the area of several of its nodes.

In order to be able to flexibly connect the crossbar to the scaffold tube, the coupling point can be designed in the form of a rosette for fastening the crossbar. The crossbar is preferably part of the scaffolding element described in the patent claims, with the crossbar being inserted into the rosette in particular in a reversibly detachable manner.

Advantageously, the inner curvature of the rosette corresponds to the outer curvature of the first, the second and the further stiffening grooves of the scaffold tube. At least the inner contour of the rosette is compatible with the outer curvature of the scaffold tube. The inner contour of the rosette corresponds to the inner curvature of the rosette and the outer contour of the scaffolding tube corresponds to the outer curvature of the scaffolding tube in the area of the stiffening grooves and outside the area of the stiffening grooves. This ensures the defined and error-free threading of the rosette onto the scaffolding tube.

In further embodiments of the present disclosure, the outer diameter of the scaffold tube is between 48.3 mm and 120 mm and/or the ratio of the inner diameter of the scaffold tube to the outer diameter of the scaffold tube is between 0.75 and 0.95. These dimensions enable flexible dimensioning of the scaffolding element while maintaining stability.

The object according to the invention is also achieved by scaffolding with a scaffolding element as described above.

The object according to the invention is also achieved by a method for producing a scaffolding element as described above. In the method, the first stiffening groove, the second stiffening groove and/or the further stiffening grooves are pressed into the scaffold tube by rolling. The scaffolding tube is deformed inward in the longitudinal axis by rolling, so that the inner curvature of the stiffening grooves corresponds to the outer curvature of the scaffolding tube. This process can be used for both aluminum and steel pipes. In another embodiment, in particular in the case of aluminum scaffolding tubes, the first reinforcement groove, the second reinforcement groove and/or the further reinforcement grooves are formed by extrusion profiling.

A further aspect of the present disclosure relates to the use of a scaffolding element described above and below in scaffolding.

Further features and advantages of the invention result from the following detailed description of exemplary embodiments of the invention, from the patent claims and from the figures of the drawing, the invention being defined solely by the attached patent claims.

Fig. 1a

eine Draufsicht in Richtung der Längsachse eines Gerüstrohrs;

Fig. 1b

eine isometrische Ansicht des Gerüstrohrs aus Fig. 1a;

Fig. 2a

eine Draufsicht auf eine Koppelstelle-Rosette in Form einer Lochscheibe zur Befestigung eines Querriegels mit Riegelkopf;

Fig. 2b

eine Seitenansicht der Rosette aus Fig. 2a;

Fig. 2c

eine isometrische Ansicht der Rosette aus den Figuren 2a und 2b;

Fig. 3a

eine isometrische Ansicht eines Gerüstelements mit einem Gerüstrohr und mit einer Rosette als Koppelstelle;

Fig. 3b

eine Draufsicht in Richtung der zentrischen Längsachse des Gerüstelements gemäß Fig. 3a;

Fig. 4a

eine Seitenansicht auf das Gerüstelement gemäß der Figuren 3a und 3b mit einem Gerüstrohr, mit einer Rosette und einem an der Rosette befestigten Querriegel mit Riegelkopf;

Fig. 4b

eine Draufsicht auf das Gerüstelement gemäß Fig. 4a;

Fig. 5

eine isometrische Ansicht eines Baugerüsts mit erfindungsgemäßen Gerüstelementen und

Fig. 6

eine isometrische Ansicht eines weiteren Baugerüsts mit erfindungsgemäßen Gerüstelementen.

Show it:

Fig. 1a

a plan view in the direction of the longitudinal axis of a scaffold tube;

Fig. 1b

an isometric view of the scaffold tube Fig. 1a ;

Figure 2a

a top view of a coupling point rosette in the form of a perforated disk for attaching a crossbar with a bolt head;

Figure 2b

a side view of the rosette Figure 2a ;

Figure 2c

an isometric view of the rosette from the Figures 2a and 2b ;

Figure 3a

an isometric view of a scaffolding element with a scaffold tube and with a rosette as a coupling point;

Figure 3b

according to a plan view in the direction of the central longitudinal axis of the framework element Figure 3a ;

Figure 4a

a side view of the scaffolding element according to FIG Figures 3a and 3b with a scaffold tube, with a rosette and a crossbar with bolt head attached to the rosette;

Figure 4b

a top view of the scaffolding element according to FIG Figure 4a ;

figure 5

an isometric view of a scaffolding with scaffolding elements according to the invention and

6

an isometric view of another scaffolding with scaffolding elements according to the invention.

Fig. 1a shows a plan view of a scaffold tube 10 with a wall thickness t that does not change in the circumferential direction. Shown is a first stiffening groove 12, a second stiffening groove 14 and six further stiffening grooves 16. The first stiffening groove 12, the second stiffening groove 14 and the six further stiffening grooves 16 are of identical shape and size. They extend parallel to a longitudinal axis of the scaffolding tube 10 and are arranged symmetrically over the circumference of the scaffolding tube 10 . The scaffold tube 10 is convex in shape and has a maximum outside diameter Da. In the area of the first stiffening groove 12, the second stiffening groove 14 and the six further stiffening grooves 16, the scaffold tube 10 is concave in shape and has a smaller outer diameter than at the convex points. In the area of the stiffening grooves 12, 14, 16, the scaffold tube also has a minimum inner diameter Dn. The concave shape in the area of the stiffening grooves 12, 14, 16 is created, for example, by rolling a cylindrical tube, in particular aluminum or steel tube. The concave shape in the area of the stiffening grooves 12, 14, 16 can also be created, for example, by extrusion profiling, particularly in the case of aluminum tubes. In the concave areas, the inner curvature of the scaffolding tube is reflected as an outer curvature.

Fig. 1b shows an isometric view of a scaffold tube 10. It has a first stiffening groove 12, a second stiffening groove 14 and six further stiffening grooves 16, which extend parallel to the central longitudinal axis 18 of the scaffold tube. The scaffold tube 10 shown shows the stiffening grooves 12, 14, 16 over its entire length. It is also possible to design the stiffening grooves 12, 14, 16 with a limited length, preferably in the area of a coupling point - rosette 20 or a node 22 (see Figure 3a ).

the Figures 2a, 2b and 2c show different views of a coupling point - rosette 20. Such a coupling point - rosette is used at a node 22 to attach a crossbar with a bolt head 24 (see Figure 4a ).

Figure 3a shows an isometric view of a scaffolding element 26 with a scaffold tube 10 at a node 22. At the node 22 a coupling point rosette 20 is attached. The scaffold tube 10 has stiffening grooves 12, 14, 16. The stiffening grooves increase the stability of the scaffold tube 10 in particular in the area of a node. The rosette 20 is shaped in such a way that it can be pushed onto the scaffold tube 10.

Figure 3b shows a top view of a node 22. You can see the scaffold tube 10 with its first stiffening groove 12, its second stiffening groove 14 and the further stiffening grooves 16. You can also see the rosette 20, which is shaped so that it fits into the stiffening grooves 12, 14, 16 engages and can be pushed onto the scaffold tube 10. The rosette 20 touches the scaffolding tube 10 in the concavely shaped areas of the stiffening grooves 12, 14, 16. In the areas in which the scaffolding tube 10 is convexly curved outwards, the rosette 20 has recesses.

Figure 4a shows the scaffolding element 26 in the area of the node 22. In Figure 4a It can also be seen that the scaffolding tube 10 has a first stiffening groove 12 which extends in the direction of the longitudinal axis 18 of the scaffolding tube 10 . The second stiffening groove 14 is formed directly next to the first stiffening groove 12 . Further stiffening grooves 16 are distributed around the circumference of the scaffold tube 10 . All stiffening grooves 12, 14, 16 run parallel to one another in the direction of the longitudinal axis 18 of the scaffold tube 10. Both shoulders 28 one The crossbar with the bolt head 24 rests against the scaffolding tube 10. In Figure 4a It can also be seen that the crossbar with the bolt head 24 is connected to the scaffold tube 10 via the rosette 20 at the node 22 in the form of a coupling point 20 . The two shoulders 28 of the crossbar with the bolt head 24 rest on the scaffold tube 10 in the area outside of the stiffening grooves.

Figure 4b shows a plan view of a node 22 in which a crossbar 24 is connected to a scaffolding tube 10 via a rosette 20 . The stiffening grooves 12, 14, 16 can be seen. It can also be seen that the upper shoulder 28 of the crossbar with the bolt head 24 is in contact with the scaffold tube 10. The shoulder 28 rests against the scaffolding tube 10 at a convex point of the scaffolding tube 10 . The inner curvature of the rosette 20 rests against the scaffold tube 10 at concave points in the areas of the stiffening grooves 12 , 14 , 16 .

figure 5 shows scaffolding 30 in the form of a shoring tower with a plurality of scaffolding elements 26 according to the invention, of which only a first scaffolding element 26 is provided with a reference number for reasons of clarity. Most of the framework elements 26 have at least one coupling point 20 . A cross bolt with a bolt head 24 can be arranged at the coupling point 20 . In the area of the coupling point 20, the scaffolding 30 has at least one first stiffening groove, which figure 5 is not visible due to the small representation of the scaffolding 30.

6 shows another scaffolding 30 in the form of a working scaffolding or facade scaffolding. The scaffolding 30 is in the form of a facade scaffolding. Analogously to scaffolding 30 according to figure 5 has the scaffolding 30 according to 6 a variety of framework elements 26 on. The scaffolding elements 26 are connected to one another via crossbars with a bolt head 24 , which are hooked into coupling points 20 , also called rosettes 20 . Stiffening grooves are in 6 not visible due to the small representation of scaffolding 30. With this form of scaffolding, the crossbars can be welded on one of the four sides of the scaffolding tube 10, with the rosette on the other three sides of the scaffolding tube 10 as a coupling point 20 each allows a connection with crossbars with bolt head 24.

Claims (14)

1. Scaffolding element (26) for a scaffold (30), wherein the scaffolding element (26) comprises a scaffolding tube (10) having a convex outer curvature and a node point (22), wherein on the node point (22)

   a) a crossbar (24) of the scaffolding element (26) is connected to the scaffolding tube (10) and/or

   b) a coupling point (20) for coupling a crossbar is formed,

   wherein the scaffolding tube (10) comprises a first stiffening notch (12) in the region of the node point (22), the stiffening notch (12) extending in parallel to the central longitudinal axis (18) of the scaffolding tube (10) as a concave recess having an curvature towards the interior like the before outer curvature, such that the inner curvature of the first stiffening notch (12) corresponds to the outer curvature of the scaffolding tube (10),

   wherein the scaffolding tube (10) comprises a second stiffening notch (14) in the region of the node point (22) being parallel to the first stiffening notch (12), wherein the inner curvature of the second stiffening notch corresponds to the outer curvature of the scaffolding tube,

   wherein the first stiffening notch (12) covers a first section of the outer circumference of the scaffolding tube (10) along a circumferential direction corresponding to an angular section between 20° and 40°, preferably 30°, with respect to the central longitudinal axis (18) of the scaffolding tube (10),

   wherein the second stiffening notch covers a second section of the outer circumference of the scaffolding tube (10) corresponding to an angular section between 20° and 40°, preferably 30°,

   wherein the first section and the second section, and thereby the first and the second stiffening notches, are directly adjacent to one another, wherein the first and the second stiffening notches are formed similar, and wherein a portion of the scaffolding tube is adjacent to the second stiffening notch, the portion not being deformed concavely, but having the normal convex outer curvature of the scaffolding tube.
2. Scaffolding element according to claim 1, wherein the first stiffening notch (12) extends substantially over the entire length of the scaffolding tube (10).
3. Scaffolding element according to claim 1 or 2, wherein the second stiffening notch covers a second section of the outer circumference of the scaffolding tube (10), wherein the second section is equally sized as the first section.
4. Scaffolding element according to one of the preceding claims, wherein the second stiffening notch (14) is formed similar to the first stiffening notch (12).
5. Scaffolding element according to one of the preceding claims, wherein one to six further stiffening notches (16) are arranged on the outer circumference of the scaffolding tube (10), the further stiffening notches (16) being formed similar to the first stiffening notch (12) and the second stiffening notch (14).
6. Scaffolding element according to claim 5, wherein the first stiffening notch (12), the second stiffening notch (14) and the further stiffening notches (16) are distributed symmetrically over the outer circumference of the scaffolding tube (10).
7. Scaffolding element according to one of claims 5 or 6, wherein the coupling point (20) is formed as a rosette, wherein the inner curvature of the rosette corresponds to the outer curvature of the first, the second and the further stiffening notches (12, 14, 16) of the scaffolding tube (10).
8. Scaffolding element according to one of the preceding claims, wherein the outer diameter (Da) of the scaffolding tube (10) is between 48,3 mm and 120 mm and/or the ratio of the inner diameter (Dn) of the scaffolding tube (10) to the outer diameter (Da) of the scaffolding tube (10) is between 0,75 and 0,95.
9. Scaffold (30) with a scaffolding element (26) according to one of claims 1 to 8.
10. Method for producing a scaffolding element (26) according to one of claims 1 to 8, wherein the outer curvature of a scaffolding tube (10) in a first section of the outer circumference along a circumferential direction of the scaffolding tube (10) which corresponds to an angular section of 20° to 40°, preferably 30°, with respect to a central longitudinal axis (18) of the scaffolding tube (10), is deformed towards the interior by rolling in a direction parallel to the central longitudinal axis (18) of the scaffolding tube or, especially for scaffolding tubes of aluminum, is formed by extrusion profiling.
11. Method for producing a scaffolding element (26) according to claim 10, wherein the outer diameter (Da) of the scaffolding tube (10) is between 48,3 mm and 120 mm and/or
    the ratio of the inner diameter (Dn) of the scaffolding tube (10) to the outer diameter (Da) of the scaffolding tube (10) is between 0,75 and 0,95.
12. Method for producing a scaffolding element (26) according to claim 10 or 11,

    wherein the outer curvature of the scaffolding tube (10) is formed by rolling towards the interior in a direction parallel to the central longitudinal axis (18) of the scaffolding tube (10),

    wherein a steel tube, especially with an outer diameter (Da) of 48,3 mm and a wall thickness (t) of ca. 2,0 to ca. 2,6 mm is deformed and

    wherein in a circumferential direction multiple sections, especially 8 sections, of the scaffolding tube (10) are deformed.
13. Method for producing a scaffolding element (26) according to one of claims 10 to 12, characterized in that the outer curvature of the scaffolding tube (10) is formed by extrusion profiling in a direction parallel to the central longitudinal axis (18) of the scaffolding tube (10),

    wherein an aluminum tube, especially with an outer diameter Da=48,3 and a wall thickness (t) of ca. 2,0 to ca. 2,6 mm, is formed, and

    wherein in a circumferential direction multiple sections, especially 8 sections, of the scaffolding tube (10) are formed.
14. Use of a scaffolding element (26) according to one of claims 1 to 8 in a scaffold (30).

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