DE102019200770A1 - Scaffolding element with a node, scaffolding with such a scaffolding element and method for producing a scaffolding element - Google Patents

Abstract

The invention relates to scaffolding element (26) for a scaffolding (30), the scaffolding element (26) having a scaffolding tube (10) with a node (22), at the node (22)
a) a cross bar (24) of the scaffold element (26) is connected to the scaffold tube (10) and / or
b) a coupling point (20) for connecting a cross bar (24) is formed, the scaffold tube (10) in the region of the node (22) having a first stiffening groove (12) which is parallel to the central longitudinal axis (18) of the scaffold tube ( 10) extends
wherein the inner curvature of the first stiffening groove (12) corresponds to the outer curvature of the scaffold tube (10).

Description

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

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, thick scaffold tubes and / or gusset plates are therefore used in the area of the junction.

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

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.

The object of the present invention is to provide a scaffolding element that is particularly stable and lightweight and, moreover, can be manufactured inexpensively. Another object of the present invention is to provide a scaffolding with such a scaffolding element and to provide a method which makes it possible to easily manufacture such a scaffolding tube. In addition, a simple solution is to be created, such a light scaffold tube from commercially available scaffold tubes, e.g. B. round tubes, to distinguish them in order to make them easily recognizable and to avoid confusion.

The object is achieved by a scaffolding element with the features of patent claim 1 and a scaffolding according to patent claim 13 and a method according to patent claim 14. The subclaims indicate appropriate further training.

The object of the invention is thus achieved by a scaffold element with a scaffold tube and a node. A crossbar of the scaffold element can be connected to the scaffold tube at the node. Alternatively or additionally, a coupling point for connecting a cross bar can be formed at the node. To stabilize the scaffold tube in the area of the node, a first stiffening groove is provided which extends parallel to a longitudinal axis of the scaffold 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 recess in the scaffold tube. Such a recess, also known as a bead, significantly increases the resilience of the scaffold tube in the area of the junction. As a result, the scaffold tube can be made thinner, which makes it significantly easier to transport. The scaffold tube preferably has a wall thickness of 2 to 4 mm in the region 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 outer diameter.

The scaffold tube is preferably in the form of a scaffold post, i.e. H. for vertical use.

It is known that various geometrical framework conditions must be observed for standard scaffolding tubes, in particular standardized ones, including a minimum wall thickness of 2.0 mm. For standard steel scaffolding tubes with an outside diameter of 48.3 mm, a minimum wall thickness of 2.7 mm is also required to comply with standards. For standard aluminum scaffolding tubes with an outside diameter of 48.3 mm, a minimum wall thickness of 3.0 mm is also required to comply with standards.

Due to the shape of the first stiffening groove according to the invention, ie a concave Deepening in the scaffold tube in its longitudinal direction, with a curvature inwards, as before convexly outwards, the scaffold tube is significantly strengthened. The fact that the outer curvature of the tube is reflected in the inner curvature of the bead results in an inner surface of the first stiffening groove which corresponds to the outer surface over the same outer circumference of the scaffold 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. The external dimensions are smaller at the locations of the stiffening grooves.

Due to the inventive design of the first stiffening groove, d. H. a concave recess in the scaffold tube in its longitudinal direction, with an inward curvature, as previously convex outwards, the scaffold tube is recognizable in a significant manner as a scaffold tube that is not customary in the market and therefore not in accordance with standards. This obvious distinction means that 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 a longitudinal axis of the scaffold tube, in particular parallel to the central longitudinal axis of the scaffold tube. The size of the first stiffening groove is advantageously chosen so that it takes up a region of the outer circumference of the scaffold tube in the circumferential direction of the scaffold tube, which corresponds to an angular range between 20 ° and 40 °, preferably 30 °, in relation to the central longitudinal axis of the scaffold tube. At the preferred 30 °, this corresponds to a 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.

The choice of an angular range between 20 ° and 40 °, preferably 30 °, allows the arrangement of several such stiffening grooves over the outer circumference of the scaffold tube and thus an increased reinforcing effect of the scaffold tube.

The scaffold tube preferably has a second stiffening groove parallel to the first stiffening groove. In the second stiffening groove, too, the inner curvature of the second stiffening groove corresponds to the outer curvature of the scaffold tube, ie. H. essentially, the convex shape of the scaffold tube is concavely deformed inward in the region of the second stiffening groove.

In a preferred embodiment, the second stiffening groove occupies a second region 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 invention, the second stiffening groove is the same size as the first stiffening groove, i. H. 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 designed in the same way as the first stiffening groove. This simplifies the manufacturing process.

In a further embodiment of the invention, the first region and the second region adjoin one another directly. Thus the first and the second area together occupy an area of the outer circumference of the scaffold tube which advantageously corresponds to between 40 ° and 80 °, preferably 60 °. The second stiffening groove then preferably adjoins the first stiffening groove, which is of the same design, in particular in the same shape or the same as the first stiffening groove. A piece of the scaffold tube then preferably adjoins the second stiffening groove, which piece is not deformed concavely, but has the normal convex outer curvature of the scaffold tube. In the preferred area size of approximately 30 ° in each case for the first and second areas, an area of a further 30 ° would then follow, which is not changed by a groove. Thus, in this embodiment, a quarter of the outer circumference of the scaffold tube has the sequence of the first stiffening groove, the second stiffening groove and the convex scaffold tube. This symmetry preferably continues over the entire outer circumference of the scaffold tube. The scaffold tube is particularly preferably axially symmetrical with respect to its central longitudinal axis. The scaffold element is further preferably axially symmetrical to the longitudinal axis of the scaffold element.

In a preferred embodiment of the invention there are a total of eight stiffening grooves in the area of nodes on the outer circumference of the scaffold tube, which are preferably all eight of the same type, in particular of the same shape or of the same design. These eight stiffening grooves advantageously take a share in the outer circumference of the scaffold tube between 50% and 80%, preferably two thirds.

The scaffolding element can have several nodes. Stiffening grooves are preferably of identical design in the area of a node. In a particularly preferred embodiment, the stiffening grooves of a scaffold are designed identically in the region 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 cross bar is preferably part of the scaffold element described in the patent claims, the cross bar being inserted into the rosette in a particularly reversible manner.

The inner curvature of the rosette advantageously 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 The outer contour of the scaffold tube corresponds to the outer curvature of the scaffold 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 scaffold tube.

In further embodiments of the invention, 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 allow flexible dimensioning of the scaffold element with simultaneous stability.

The object of the invention is further achieved by a scaffolding with a previously described scaffolding element.

The object according to the invention is further achieved by a method for producing a previously described scaffolding element. 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 scaffold tube is deformed inwards in the longitudinal axis by rollers so that the internal curvature of the stiffening grooves corresponds to the external curvature of the scaffold tube. This process can be used for both aluminum and steel pipes. In a further embodiment, in particular in the case of scaffold tubes made of aluminum, the first stiffening groove, the second stiffening groove and / or the further stiffening grooves are formed by extrusion profiling.

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.

• 1a eine Draufsicht in Richtung der Längsachse eines Gerüstrohrs;
• 1b eine isometrische Ansicht des Gerüstrohrs aus 1a;
• 2a eine Draufsicht auf eine Koppelstelle-Rosette in Form einer Lochscheibe zur Befestigung eines Querriegels mit Riegelkopf;
• 2b eine Seitenansicht der Rosette aus 2a;
• 2c eine isometrische Ansicht der Rosette aus den 2a und 2b;
• 3a eine isometrische Ansicht eines Gerüstelements mit einem Gerüstrohr und mit einer Rosette als Koppelstelle;
• 3b eine Draufsicht in Richtung der zentrischen Längsachse des Gerüstelements gemäß 3a;
• 4a eine Seitenansicht auf das Gerüstelement gemäß der 3a und 3b mit einem Gerüstrohr, mit einer Rosette und einem an der Rosette befestigten Querriegel mit Riegelkopf;
• 4b eine Draufsicht auf das Gerüstelement gemäß 4a;
• 5 eine isometrische Ansicht eines Baugerüsts mit erfindungsgemäßen Gerüstelementen und
• 6 eine isometrische Ansicht eines weiteren Baugerüsts mit erfindungsgemäßen Gerüstelementen.

Show it:

• 1a a plan view in the direction of the longitudinal axis of a scaffold tube;
• 1b an isometric view of the scaffold tube 1a ;
• 2a a plan view of a coupling rosette in the form of a perforated disc for fastening a cross bolt with bolt head;
• 2 B a side view of the rosette 2a ;
• 2c an isometric view of the rosette from the 2a and 2 B ;
• 3a an isometric view of a scaffold element with a scaffold tube and with a rosette as a coupling point;
• 3b a plan view in the direction of the central longitudinal axis of the scaffold element according 3a ;
• 4a a side view of the scaffold element according to the 3a and 3b with a scaffold tube, with a rosette and a cross bolt with bolt head attached to the rosette;
• 4b a plan view of the scaffold element according to 4a ;
• 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.

1a shows a plan view of a scaffold tube 10th with a circumferential wall thickness t. A first stiffening groove is shown 12th , a second stiffening groove 14 and six more stiffening grooves 16 . The first stiffening groove 12th , the second stiffening groove 14 and the six other stiffening grooves 16 are of identical shape and size. They extend parallel to a longitudinal axis of the scaffold tube 10th and are symmetrical over the circumference of the scaffold tube 10th arranged. The scaffold tube 10th is convex in shape and has a maximum outer diameter Da. In the area of the first stiffening groove 12th , the second stiffening groove 14 and the six other stiffening grooves 16 is the scaffold tube 10th concave in shape and has a smaller outer diameter than at the convex points. In the area of the stiffening grooves 12th , 14 , 16 the scaffold tube also has a minimal inside diameter Dn. The concave shape in the area of the stiffening grooves 12th , 14 , 16 arises, for example, by rolling a cylindrical tube, in particular aluminum or steel tube. The concave shape in the area of the stiffening grooves 12th , 14 , 16 can also be created, for example, by extrusion profiling, particularly in the case of aluminum tubes. The inner curvature of the scaffold tube is found as an outer curvature in the concave areas.

1b shows an isometric view of a scaffold tube 10th . It has a first stiffening groove 12th , a second stiffening groove 14 and six more stiffening grooves 16 on, which is parallel to the central longitudinal axis 18th extend the scaffold tube. The scaffold tube shown 10th shows the stiffening grooves 12th , 14 , 16 over its entire length. It is also possible to use the stiffening grooves 12th , 14 , 16 to be carried out in a limited length, preferably in Area of a coupling point - rosette 20 or a node 22 (please refer 3a) .

The 2a , 2 B and 2c show different views of a coupling point - rosette 20 . Such a coupling point rosette is used at a node 22 for fastening a cross bolt with bolt head 24th (please refer 4a) .

3a shows an isometric view of a scaffold element 26 with a scaffold tube 10th at a node 22 . At the junction 22 is a coupling point rosette 20 appropriate. The scaffold tube 10th has stiffening grooves 12th , 14 , 16 on. In the area of a junction in particular, the stiffening grooves reinforce the stability of the scaffold tube 10th . The rosette 20 is shaped to fit on the scaffold tube 10th can be postponed.

3b shows a top view of a node 22 . You can see the scaffold tube 10th with its first stiffening groove 12th , its second stiffening groove 14 and the other stiffening grooves 16 . You can also see the rosette 20 which is shaped so that it fits into the stiffening grooves 12th , 14 , 16 engages and on the scaffold tube 10th can be postponed. The rosette 20 touches the scaffold tube 10th in the concave areas of the stiffening grooves 12th , 14 , 16 . In the areas where the scaffold tube 10th is curved convex outwards, the rosette shows 20 Recesses on.

4a shows the scaffolding element 26 in the area of the node 22 . In 4a it can be seen further that the scaffold tube 10th a first stiffening groove 12th has, which is in the direction of the longitudinal axis 18th of the scaffold tube 10th extends. Right next to the first stiffening groove 12th is the second stiffening groove 14 educated. More stiffening grooves 16 are around the circumference of the scaffold tube 10th distributed. All stiffening grooves 12th , 14 , 16 run parallel to each other in the direction of the longitudinal axis 18th of the scaffold tube 10th . Both shoulders 28 a cross bolt with a bolt head 24th lie on the scaffold tube 10th on. In 4a can also be seen that the cross bolt with bolt head 24th about the rosette 20 at the node 22 in the form of a coupling point 20 with the scaffold tube 10th connected is. The two shoulders 28 of the cross bolt with bolt head 24th are in the area outside of stiffening grooves on the scaffold tube 10th on.

4b shows a plan view of a node 22 where a crossbar 24th over a rosette 20 with a scaffold tube 10th connected is. The stiffening grooves can be seen 12th , 14 , 16 . You can also see that the upper shoulder 28 of the cross bolt with bolt head 24th on the scaffold tube 10th is present. The shoulder 28 lies at a convex point on the scaffold tube 10th on the scaffold tube 10th on. The rosette 20 lies with its inner curvature in concave areas in the areas of the stiffening grooves 12th , 14 , 16 on the scaffold tube 10th on.

5 shows a scaffolding 30th in the form of a supporting scaffold tower with several scaffolding elements according to the invention 26 , of which only a first scaffold element for reasons of clarity 26 is provided with a reference number. The scaffolding elements 26 mostly have at least one coupling point 20 on. At the coupling point 20 is a cross bolt with a bolt head 24th can be arranged. In the area of the coupling point 20 shows the scaffolding 30th at least a first stiffening groove, which in 5 due to the small representation of the scaffolding 30th is not visible.

6 shows another scaffolding 30th in the form of a work or facade scaffold. The scaffolding 30th is designed in the form of a facade scaffold. Analogous to the scaffolding 30th according to 5 shows the scaffolding 30th according to 6 a variety of scaffolding elements 26 on. The scaffolding elements 26 are via crossbars with bolt head 24th linked together in coupling points 20 , also rosettes 20 called, are attached. Stiffening grooves are in 6 due to the small representation of the scaffolding 30th not visible. This form of scaffolding can be used on one of the four sides of the scaffold tube 10th the crossbars are welded, being on the other three sides of the scaffold tube 10th the rosette as a coupling point 20 one connection each with cross bolts with bolt head 24th enables.

QUOTES INCLUDE IN THE DESCRIPTION

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Patent literature cited

• DE 102016204696 A1 [0004]

Claims (17)

Scaffolding element (26) for a scaffolding (30), wherein the scaffolding element (26) has a scaffolding tube (10) with a node (22), with a cross bar (24) of the scaffolding element (26) at the node (22) a) the scaffold tube (10) is connected and / or b) a coupling point (20) is formed for connecting a cross bar, the scaffold tube (10) in the area of the node (22) having a first stiffening groove (12) which is parallel to the central one Longitudinal axis (18) of the scaffold tube (10), characterized in that the inner curvature of the first stiffening groove (12) corresponds to the outer curvature of the scaffold tube (10). Scaffolding element after Claim 1 , characterized in that the first stiffening groove (12) extends substantially over the entire length of the scaffold tube (10). Scaffolding element after Claim 1 or 2nd , characterized in that the first stiffening groove (12) in the circumferential direction of the scaffold tube (10) occupies a first region of the outer circumference of the scaffold tube (10) which has an angular range with respect to the central longitudinal axis (18) of the scaffold tube (10) between 20 ° and 40 °, preferably 30 °, corresponds. Scaffolding element according to one of the preceding claims, characterized in that the scaffolding tube (10) in the region of the node (22) has a second stiffening groove (14) parallel to the first stiffening groove (12), the inner curvature of the second stiffening groove of the outer curvature of the scaffolding tube (10 ) corresponds. Scaffolding element after Claim 4 , characterized in that the second stiffening groove occupies a second region of the outer circumference of the scaffold tube (10), which corresponds to an angular range between 20 ° and 40 °, preferably 30 °. Scaffolding element after Claim 4 or 5 , characterized in that the second stiffening groove occupies a second area of the outer circumference of the scaffold tube (10), the second area being the same size as the first area. Scaffolding element according to one of the Claims 4 to 6 , characterized in that the second stiffening groove (14) is of the same design as the first stiffening groove (12). Scaffolding element according to one of the Claims 5 to 7 , characterized in that the first area and the second area directly adjoin one another. Scaffolding element according to one of the preceding claims, characterized in that on the outer circumference of the scaffolding tube (10) there are one to six further stiffening grooves (16) which are designed in the same way as the first stiffening groove (12) and the second stiffening groove (14). Scaffolding element after Claim 9 , characterized in that the first stiffening groove (12), the second stiffening groove (14) and the further stiffening grooves (16) are distributed symmetrically over the outer circumference of the scaffold tube (10). Scaffolding element according to one of the Claims 9 or 10th , characterized in that the coupling point (20) is designed as a rosette, the inner curvature of the rosette corresponding to the outer curvature of the first, second and further stiffening grooves (12, 14, 16) of the scaffold tube (10). Scaffold element according to one of the preceding claims, characterized in that the outer diameter (Da) of the scaffold tube (10) is between 48.3 mm and 120 mm and / or the ratio of the inner diameter (Dn) of the scaffold tube (10) to the outer diameter (Da) of the scaffold tube (10) is between 0.75 and 0.95. Scaffolding (30) with a scaffolding element (26) according to one of the Claims 1 to 12th . Method for producing a scaffolding element (26) according to one of the Claims 1 to 12th , characterized in that the outer curvature of the scaffold tube (10) in a first region of the outer circumference in the circumferential direction of the scaffold tube (10), which has an angular range in relation to the central longitudinal axis (18) of the scaffold tube (10) of 20 ° to 40 ° degrees, is preferred 30 °, corresponds in the direction parallel to the central longitudinal axis (18) of the scaffold tube is deformed inwards by rolling or, in particular in the case of scaffolding tubes made of aluminum, is formed by extruded profiling. Method for producing a scaffold tube (10) according to Claim 14 , characterized in that the outer diameter (Da) of the scaffold tube (10) is between 48.3 mm and 120 mm and / or the ratio of the inner diameter (Dn) of the scaffold tube (10) to the outer diameter (Da) of the scaffold tube (10) between 0.75 and 0.95. Method for producing a scaffold tube (10) according to Claim 14 or 15 , characterized in that the outer curvature of the scaffold tube (10) is deformed inwards in the direction parallel to the central longitudinal axis (18) of the scaffold tube (10), a steel tube, in particular with an outer diameter (Da) 48.3 mm and a wall thickness (t) from approx. 2.0 to approx. 2.6 mm, is deformed and several regions, in particular 8 regions, of the scaffold tube (10) are deformed in the circumferential direction. Method for producing a scaffold tube (10) according to one of the Claims 14 to 16 , characterized in that the outer curvature of the scaffold tube (10) is formed in the direction parallel to the central longitudinal axis (18) of the scaffold tube (10) by extrusion profiling, an aluminum tube, in particular with an outer diameter Da = 48.3 mm and a wall thickness ( t) of approximately 2.0 to approximately 2.6 mm, and wherein in the circumferential direction several regions, in particular 8 regions, of the scaffold tube (10) are formed.

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