EP2492028A2 - Method for applying a rosette to a tube - Google Patents

Method for applying a rosette to a tube Download PDF

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Publication number
EP2492028A2
EP2492028A2 EP12001074A EP12001074A EP2492028A2 EP 2492028 A2 EP2492028 A2 EP 2492028A2 EP 12001074 A EP12001074 A EP 12001074A EP 12001074 A EP12001074 A EP 12001074A EP 2492028 A2 EP2492028 A2 EP 2492028A2
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EP
European Patent Office
Prior art keywords
rosette
hole
tube
plane
pipe
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP12001074A
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German (de)
French (fr)
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EP2492028A3 (en
EP2492028B1 (en
Inventor
Erich Spreitzer
Martin Leichtfried
Martin Kirchweger
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WELSER PROFILE AUSTRIA GmbH
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WELSER PROFILE AUSTRIA GmbH
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/06—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes in openings, e.g. rolling-in
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G1/00—Scaffolds primarily resting on the ground
    • E04G1/02—Scaffolds primarily resting on the ground composed essentially of members elongated in one dimension only, e.g. poles, lattice masts, with or without end portions of special form, connected together by any means
    • E04G1/12—Scaffolds primarily resting on the ground composed essentially of members elongated in one dimension only, e.g. poles, lattice masts, with or without end portions of special form, connected together by any means comprising members of special, e.g. composite, cross-section or with lugs or the like or lateral apertures for supporting or attaching other members
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G7/00—Connections between parts of the scaffold
    • E04G7/30—Scaffolding bars or members with non-detachably fixed coupling elements

Definitions

  • the present invention relates to a method of applying a rosette to a pipe.
  • Such tubes are z. B. used as supports in scaffolding. These are mostly metal pipes with a diameter of about 50 mm and a wall thickness of about 3 mm.
  • To mount the scaffold planks serve so-called rosettes, which are pushed onto the tubes and then welded to the pipe.
  • the welding of the rosettes to the metal pipe usually requires manual labor and leads to structural changes in the pipe.
  • the use of galvanized pipes requires subsequent post-galvanizing.
  • non-galvanized pipes can be welded with rosettes, after which the pipes must then be galvanized.
  • the object of the present invention is to avoid the disadvantages caused by welding and to provide a cost-effective method for applying rosettes to a pipe.
  • the rosette has a through hole for insertion of the tube and that initially the edge portion of the through hole is bent out of the plane of the rosette, so that the clear distance of the opposite edges of the through hole is greater than the outer dimensions of the tube , and the repositioning of the rosette on the tube of the peripheral area surrounding the through-hole is pushed back into the plane of the rosette, whereby the clear distance of the opposite edges of the through-hole is reduced to a dimension which is smaller than the original outer dimension of the tube.
  • the rosette is pressed onto the pipe, whereby both deformations on the rosette and deformations take place on the pipe.
  • the tube gets a constriction in the area of the rosette.
  • the method is suitable for fastening all possible flat metal components on a pipe, including plates or sheets, which have a greater extent than the rosettes used for the framework manufacturing.
  • the tube has a cylindrical outer circumference.
  • the rosette has a round through hole.
  • the edges of the through hole lie all over the outer tube wall when the margins are pushed back into the plane of the rosette. As a result, a very uniform loading of the tube is achieved.
  • the rosette has a star-shaped through hole with inwardly projecting cantilevers, wherein the diameter of the through hole is determined by the free ends of the cantilevers.
  • These cantilevers press like the teeth of a bit in the outer circumference of the tube, so that a positive connection is achieved not only in the longitudinal direction of the tube, but also in the circumferential direction of the tube shell.
  • a method in which the bending out of the edge region is effected by impressing a circumferential bead around the through hole, so that the edge of the through hole lies substantially in the plane of the rosette, while the radially outer edge region is pushed out of the plane is, and after insertion of the tube, the bead is pushed back into the plane of the rosette.
  • This approach has the advantage that during the pressing back of the edge region of the rosette takes place virtually no relative movement between the edge of the through hole and the tube in the longitudinal direction. The edge is merely pressed radially into the lateral surface of the tube, while the deformation work takes place substantially exclusively in the material of the rosette itself.
  • the material thickness of the rosette is significantly greater than the wall thickness of the tube, and preferably at least twice to three times as large. This material strength not only ensures a sufficient deformation force to constrict the tube; it also serves to avoid that there are dislocations within the rosette. As low has also been found, if the degree of deformation of the tube is about half to simple wall thickness of the tube.
  • the output arrangement consists of a tube 1 and a rosette surrounding the tube 2. Both are in the FIGS. 1 to 4 each shown in cross section, wherein the tube 1 is usually a scaffold tube and accordingly much longer than in Fig. 1 shown.
  • the material thickness A of the rosette 2 is in the embodiment shown here about 2 1/2 times as large as the wall thickness of the tube 1.
  • the rosette 2 has a through hole 3, the opposite edges 4 have a clearance C, in the Fig. 1 shown arrangement is greater than the outer diameter D of the tube.
  • Fig. 1 clearly shows that around the through hole a circumferential bead 5 is formed, which forms the edge region of the through hole 3.
  • the edges 4 themselves lie in the plane of the rosette 2. Only the bead is bent out of the plane or embossed.
  • the rosette 2 is pushed in the embodiment just described on the tube 1, to the position at which a later attachment is to take place.
  • the Fig. 3 to 6 show a further embodiment of the invention.
  • the essential difference to the embodiment of the Fig. 1 and 2 is that the through hole 3 is not round, but star-shaped. Due to the star-shaped configuration of the through hole 3, cantilevers 6 are formed which project radially inwards and whose free ends 7 form the edges 4 of the through-hole 3.
  • a circumferential bead 5 are pressed into the rosette 2 (see. Fig. 3 ), after which, after pushing out the rosette 2 on the tube 1, the bead 5 is pushed back into the plane of the rosette (see. Fig. 4 ).
  • the free ends of the cantilever arms 6 press into the wall of the tube 1, which now not only creates a positive connection in the longitudinal direction of the tube, but also in the circumferential direction of the tube.
  • the star-shaped configuration also has the advantage that lower forces are required for impressing the bead and that even when pressing back the bead, lower forces are sufficient to press the cantilevers into the pipe wall.
  • the deformation depth in the pipe wall is in the embodiments shown here about half the wall thickness B of a pipe.
  • the invention has been described herein with reference to the preparation of a scaffold tube.
  • different-area metal parts can be mounted on pipes having other cross sections, for example a rectangular cross section.
  • the shape of the rosette may differ from the shape shown in the figures.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Connection Or Junction Boxes (AREA)
  • Details Of Indoor Wiring (AREA)
  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)

Abstract

The method involves bending an edge region (5) of a through-hole (3) out of a plane of a collar so that an internal spacing (C) of opposite edges of the through-hole is greater than an outer dimension (D) of a pipe (1). The edge region is pushed back into the plane of the collar according to positioning of the collar on the pipe. The internal spacing of the opposite edges of the through-hole is reduced to a certain level that is smaller than the outer dimension of the pipe, where the internal spacing is determined by free ends of cantilever arms. An independent claim is also included for a scaffold support comprising a collar.

Description

Die vorliegende Erfindung bezieht sich auf ein Verfahren zum Aufbringen einer Rosette auf ein Rohr. Solche Rohre werden z. B. als Stützen im Gerüstbau verwendet. Es handelt sich zumeist um Metallrohre mit einem Durchmesser von ca. 50 mm und eine Wandstärke von ca. 3 mm. Zum Einhängen der Gerüstbohlen dienen sogenannte Rosetten, die auf die Rohre aufgeschoben und dann mit dem Rohr verschweißt werden. Das Anschweißen der Rosetten an das Metallrohr erfordert in der Regel Handarbeit und führt zu Gefügeveränderungen im Rohr. Zudem erfordert die Verwendung von verzinkten Rohren ein anschließendes Nachverzinken. Alternativ können unverzinkte Rohre mit Rosetten verschweißt werden, wonach die Rohre dann im Anschluss verzinkt werden müssen.The present invention relates to a method of applying a rosette to a pipe. Such tubes are z. B. used as supports in scaffolding. These are mostly metal pipes with a diameter of about 50 mm and a wall thickness of about 3 mm. To mount the scaffold planks serve so-called rosettes, which are pushed onto the tubes and then welded to the pipe. The welding of the rosettes to the metal pipe usually requires manual labor and leads to structural changes in the pipe. In addition, the use of galvanized pipes requires subsequent post-galvanizing. Alternatively, non-galvanized pipes can be welded with rosettes, after which the pipes must then be galvanized.

Aufgabe der vorliegenden Erfindung ist es, die durch das Schweißen verursachten Nachteile zu vermeiden und ein kostengünstiges Verfahren zum Aufbringen von Rosetten auf ein Rohr zur Verfügung zu stellen.The object of the present invention is to avoid the disadvantages caused by welding and to provide a cost-effective method for applying rosettes to a pipe.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, dass die Rosette ein Durchgangsloch zum Einführen des Rohres aufweist und dass zunächst der Randbereich des Durchgangslochs aus der Ebene der Rosette herausgebogen wird, so dass der lichte Abstand der sich gegenüberliegenden Ränder des Durchgangslochs größer als die Außenabmessungen des Rohres ist, und das Nachpositionieren der Rosette auf dem Rohr der das Durchgangsloch umgebende Randbereich in die Ebene der Rosette zurückgedrückt wird, wodurch sich der lichte Abstand der gegenüberliegenden Ränder des Durchgangslochs auf ein Maß verringert, das kleiner ist als die ursprüngliche Außenabmessung des Rohres.This object is achieved in that the rosette has a through hole for insertion of the tube and that initially the edge portion of the through hole is bent out of the plane of the rosette, so that the clear distance of the opposite edges of the through hole is greater than the outer dimensions of the tube , and the repositioning of the rosette on the tube of the peripheral area surrounding the through-hole is pushed back into the plane of the rosette, whereby the clear distance of the opposite edges of the through-hole is reduced to a dimension which is smaller than the original outer dimension of the tube.

Auf diese Weise wird die Rosette auf das Rohr aufgepresst, wodurch sowohl Verformungen an der Rosette als auch Verformungen am Rohr stattfinden. Das Rohr erhält im Bereich der Rosette eine Einschnürung. Auf die Art und Weise wird zwischen der Rosette und dem Rohr nicht nur ein Kraftschluss, sondern auch ein Formschluss erreicht. Grundsätzlich eignet sich das Verfahren zur Befestigung aller möglichen flächigen metallischen Bauteile auf einem Rohr, also auch Platten oder Bleche, die eine größere Ausdehnung als die für die Gerüstherstellung verwendeten Rosetten haben.In this way, the rosette is pressed onto the pipe, whereby both deformations on the rosette and deformations take place on the pipe. The tube gets a constriction in the area of the rosette. In the way, not only a frictional connection, but also a positive connection is achieved between the rosette and the tube. In principle, the method is suitable for fastening all possible flat metal components on a pipe, including plates or sheets, which have a greater extent than the rosettes used for the framework manufacturing.

Gemäß einer besonderen Ausführungsform weist das Rohr einen zylindrischen Außenumfang auf.According to a particular embodiment, the tube has a cylindrical outer circumference.

In diesem Zusammenhang ist auch günstig, wenn die Rosette ein rundes Durchgangsloch aufweist. Die Ränder des Durchgangslochs liegen vollflächig an der äußeren Rohrwandung an, wenn die Randbereiche in die Ebene der Rosette zurück gedrückt sind. Hierdurch wird eine sehr gleichmäßige Belastung des Rohres erreicht.In this context, it is also advantageous if the rosette has a round through hole. The edges of the through hole lie all over the outer tube wall when the margins are pushed back into the plane of the rosette. As a result, a very uniform loading of the tube is achieved.

Von besonderem Vorteil ist auch, wenn die Rosette ein sternförmiges Durchgangsloch mit nach innen ragenden Kragarmen aufweist, wobei der Durchmesser des Durchgangslochs durch die freien Enden der Kragarme bestimmt ist. Diese Kragarme drücken sich wie die Zähne eines Gebisses in den Außenumfang des Rohres hinein, so dass ein Formschluss nicht nur in Längsrichtung des Rohres, sondern auch in Umfangsrichtung des Rohrmantels erreicht wird.Of particular advantage is also when the rosette has a star-shaped through hole with inwardly projecting cantilevers, wherein the diameter of the through hole is determined by the free ends of the cantilevers. These cantilevers press like the teeth of a bit in the outer circumference of the tube, so that a positive connection is achieved not only in the longitudinal direction of the tube, but also in the circumferential direction of the tube shell.

Besonders bevorzugt wird ein Verfahren, bei dem das Herausbiegen des Randbereichs durch Einprägen einer um das Durchgangsloch herum umlaufenden Sicke erfolgt, so dass der Rand des Durchgangslochs im Wesentlichen in der Ebene der Rosette liegt, während der radial weiter außen liegende Randbereich aus der Ebene hinaus gedrückt ist, und das nach Einführen des Rohres die Sicke in die Ebene der Rosette zurückgedrückt wird. Diese Vorgehensweise hat den Vorteil, dass während des Zurückdrückens des Randbereichs der Rosette praktisch keine Relativbewegung zwischen dem Rand des Durchgangslochs und dem Rohr in dessen Längsrichtung stattfindet. Der Rand wird lediglich radial in die Mantelfläche des Rohres hinein gedrückt, während die Verformungsarbeit im Wesentlichen ausschließlich im Material der Rosette selbst stattfindet.Particularly preferred is a method in which the bending out of the edge region is effected by impressing a circumferential bead around the through hole, so that the edge of the through hole lies substantially in the plane of the rosette, while the radially outer edge region is pushed out of the plane is, and after insertion of the tube, the bead is pushed back into the plane of the rosette. This approach has the advantage that during the pressing back of the edge region of the rosette takes place virtually no relative movement between the edge of the through hole and the tube in the longitudinal direction. The edge is merely pressed radially into the lateral surface of the tube, while the deformation work takes place substantially exclusively in the material of the rosette itself.

Als günstig hat sich herausgestellt, wenn der lichte Abstand der Ränder des Durchgangslochs im Verhältnis zum Außendurchmesser des Rohres so gewählt ist, dass sich das Rohr beim Zusammendrücken des aufgebogenen Randbereichs der Rosette nach innen verformt, wobei die Rosette an ihrem Aussenumfang in Richtung des Durchgangslochs abgestützt wird. Zwar ist es grundsätzlich auch denkbar, die Abstände so zu wählen, dass lediglich ein Presssitz zwischen der Rosette und dem Rohr erreicht wird; für viele Anwendungen ist es jedoch wünschenswert, wenn durch Verformen des Rohrs auch ein Formschluss erreicht wird.It has proven to be advantageous if the clear distance of the edges of the through hole in relation to the outer diameter of the tube is chosen so that the tube deforms upon compression of the bent edge region of the rosette inwardly, wherein the rosette supported on its outer periphery in the direction of the through hole becomes. Although in principle it is also conceivable to choose the distances so that only a press fit between the rosette and the pipe is achieved; For many applications, however, it is desirable if a positive connection is achieved by deforming the tube.

In diesem Zusammenhang ist es auch günstig, wenn die Materialstärke der Rosette deutlich größer ist als die Wandstärke des Rohres und vorzugsweise mindestens doppelt bis dreimal so groß ist. Diese Materialstärke stellt nicht nur eine hinreichende Verformungskraft zur Einschnürung des Rohres sicher; sie dient auch dazu, dass es innerhalb der Rosette nicht zu Verwerfungen kommt. Als günstig hat sich ferner herausgestellt, wenn das Maß der Verformung des Rohres etwa der halben bis einfachen Wandstärke des Rohres entspricht.In this context, it is also advantageous if the material thickness of the rosette is significantly greater than the wall thickness of the tube, and preferably at least twice to three times as large. This material strength not only ensures a sufficient deformation force to constrict the tube; it also serves to avoid that there are dislocations within the rosette. As low has also been found, if the degree of deformation of the tube is about half to simple wall thickness of the tube.

Im Folgenden werden Ausführungsbeispiele der Erfindung anhand einer Zeichnung näher erläutert.In the following, embodiments of the invention will be explained in more detail with reference to a drawing.

Es zeigen:

Fig. 1
ein Rohr mit einer aufgeschobenen Rosette vor der Verformung des Rohrs,
Fig. 2
die Anordnung nach Fig. 1, nachdem die Rosette zurück geformt ist,
Fig. 3
eine ähnliche Anordnung wie Fig. 1, jedoch mit einer Rosette mit einem sternförmigen Durchgangsloch entsprechend der Draufsicht in Fig. 5,
Fig. 4
die Anordnung aus Fig. 3 im montierten Zustand, ähnlich Fig. 2,
Fig. 5
eine Draufsicht auf die Anordnung aus Fig. 4 und
Fig. 6
eine perspektivische Ansicht der Anordnung aus Fig. 5.
Show it:
Fig. 1
a pipe with a pushed rosette before deformation of the pipe,
Fig. 2
the arrangement after Fig. 1 after the rosette is shaped back,
Fig. 3
a similar arrangement as Fig. 1 but with a rosette with a star-shaped through hole corresponding to the top view in FIG Fig. 5 .
Fig. 4
the arrangement Fig. 3 in the assembled state, similar Fig. 2 .
Fig. 5
a plan view of the arrangement Fig. 4 and
Fig. 6
a perspective view of the arrangement Fig. 5 ,

Wie aus Fig. 1 ersichtlich ist, besteht die Ausgangsanordnung aus einem Rohr 1 und einer das Rohr umgebenden Rosette 2. Beide sind in den Figuren 1 bis 4 jeweils im Querschnitt dargestellt, wobei das Rohr 1 üblicherweise ein Gerüstrohr und dementsprechend deutlich länger ist, als in Fig. 1 gezeigt. Die Materialstärke A der Rosette 2 ist bei dem hier gezeigten Ausführungsbeispiel etwa 2 1/2 mal so groß wie die Wandstärke des Rohres 1. Die Rosette 2 weist ein Durchgangsloch 3 auf, dessen sich gegenüberliegende Ränder 4 einen lichten Abstand C aufweisen, der in der Fig. 1 dargestellten Anordnung größer ist als der Außendurchmesser D des Rohres 1. Fig. 1 zeigt deutlich, dass rund um das Durchgangsloch eine umlaufende Sicke 5 eingeformt wird, die den Randbereich des Durchgangslochs 3 bildet. Die Ränder 4 selbst liegen in der Ebene der Rosette 2. Lediglich die Sicke ist aus der Ebene herausgebogen bzw. geprägt. Die Rosette 2 wird in der eben beschriebenen Ausgestaltung auf das Rohr 1 aufgeschoben, bis an die Position, an der später eine Befestigung erfolgen soll.How out Fig. 1 it can be seen, the output arrangement consists of a tube 1 and a rosette surrounding the tube 2. Both are in the FIGS. 1 to 4 each shown in cross section, wherein the tube 1 is usually a scaffold tube and accordingly much longer than in Fig. 1 shown. The material thickness A of the rosette 2 is in the embodiment shown here about 2 1/2 times as large as the wall thickness of the tube 1. The rosette 2 has a through hole 3, the opposite edges 4 have a clearance C, in the Fig. 1 shown arrangement is greater than the outer diameter D of the tube. 1 Fig. 1 clearly shows that around the through hole a circumferential bead 5 is formed, which forms the edge region of the through hole 3. The edges 4 themselves lie in the plane of the rosette 2. Only the bead is bent out of the plane or embossed. The rosette 2 is pushed in the embodiment just described on the tube 1, to the position at which a later attachment is to take place.

Zum Befestigen wird, wie hier nicht mehr dargestellt ist, von oben und von unten ein Pressstempel auf die Rosette 2 zu bewegt, der die Sicke 5 wieder zurück in die Ebene der Rosette 2 formt. Aufgrund des Zurückformens der Sicke 5 entsteht eine Situation, wie sie in Fig. 2 dargestellt ist. Die Ränder 4 des Durchgangslochs 3 bewegen sich aufeinander zu und schnüren das Rohr 1 ein.To attach is, as is not shown here, from above and from below a ram on the rosette 2 moves, which forms the bead 5 back into the plane of the rosette 2. Due to the reshaping of the bead 5 creates a situation as in Fig. 2 is shown. The edges 4 of the through hole 3 move toward each other and lace the tube 1.

Aufgrund des Zurückformens der Sicke 5 entsteht eine Situation, wie sie in Fig. 2 dargestellt ist. Die Ränder 4 des Durchgangslochs 3 bewegen sich aufeinander zu und schnüren das Rohr 1 ein. Hierdurch wird nicht nur die Rosette 2 auf das Rohr 1 aufgepresst, es entsteht vielmehr eine Verformung des Rohres 1, die auch für eine formschlüssige Verbindung zwischen der Rosette 2 und dem Rohr 1 sorgt. Der lichte Abstand C1 der Ränder 4 in Fig. 2 ist somit kleiner als der Außendurchmesser D des unverformten Rohres 1.Due to the reshaping of the bead 5 creates a situation as in Fig. 2 is shown. The edges 4 of the through hole 3 move toward each other and lace the tube 1. As a result, not only the rosette 2 is pressed onto the tube 1, but rather there is a deformation of the tube 1, which also for a positive connection between the rosette 2 and the tube 1 provides. The clear distance C1 of the edges 4 in Fig. 2 is thus smaller than the outer diameter D of the undeformed tube. 1

Die Fig. 3 bis 6 zeigen ein weiteres Ausführungsbeispiel der Erfindung. der wesentliche Unterscheid zu dem Ausführungsbeispiel nach den Fig. 1 und 2 besteht darin, dass das Durchgangsloch 3 nicht rund, sondern sternförmig ausgestaltet ist. Aufgrund der sternförmigen Ausgestaltung des Durchgangslochs 3 entstehen Kragarme 6, die radial nach innen vorstehen und deren freie Enden 7 die Ränder 4 des Durchgangslochs 3 bilden.The Fig. 3 to 6 show a further embodiment of the invention. the essential difference to the embodiment of the Fig. 1 and 2 is that the through hole 3 is not round, but star-shaped. Due to the star-shaped configuration of the through hole 3, cantilevers 6 are formed which project radially inwards and whose free ends 7 form the edges 4 of the through-hole 3.

Wie im zuvor genannten Beispiel auch, werden in die Rosette 2 eine umlaufende Sicke 5 eingepresst (vgl. Fig. 3), wonach nach Ausschieben der Rosette 2 auf das Rohr 1 die Sicke 5 wieder in die Ebene der Rosette zurückgedrückt wird (vgl. Fig. 4). Hierdurch drücken sich die freien Enden der Kragarme 6 in die Wandung des Rohres 1 ein, wodurch nun nicht nur ein Formschluss in Längsrichtung des Rohres, sondern auch in Umfangsrichtung des Rohres entsteht. Gegenüber der runden Ausgestaltung des Durchgangslochs hat die sternförmige Ausgestaltung zudem den Vorteil, dass für das Einprägen der Sicke geringere Kräfte aufzuwenden sind und dass auch beim Zurückdrücken der Sicke geringere Kräfte ausreichen, um die Kragarme in die Rohrwandung hineinzudrücken.As in the example above, a circumferential bead 5 are pressed into the rosette 2 (see. Fig. 3 ), after which, after pushing out the rosette 2 on the tube 1, the bead 5 is pushed back into the plane of the rosette (see. Fig. 4 ). As a result, the free ends of the cantilever arms 6 press into the wall of the tube 1, which now not only creates a positive connection in the longitudinal direction of the tube, but also in the circumferential direction of the tube. Compared with the round configuration of the through-hole, the star-shaped configuration also has the advantage that lower forces are required for impressing the bead and that even when pressing back the bead, lower forces are sufficient to press the cantilevers into the pipe wall.

Die Verformungstiefe in der Rohrwandung beträgt bei dem hier dargestellten Ausführungsbeispielen etwa die Hälfte der Wandstärke B eines Rohres.The deformation depth in the pipe wall is in the embodiments shown here about half the wall thickness B of a pipe.

Ein Vorteil der verschiedenen Verbindungsart gegenüber dem Schweißen ist, dass sowohl Rosette als auch Rohr vor dem Verbinden oberflächenbehandelt, beispielsweise verzinkt sein können. Bei entsprechender Schmierung der Presswerkzeuge ist es möglich, die Verbindung so herzustellen, dass die Oberfläche nicht zerstört wird, so dass ein Nachverzinken oder Nachbehandeln in aller Regel entbehrlich ist.An advantage of the different type of connection to welding is that both the rosette and the pipe can be surface-treated before joining, for example galvanized. With appropriate lubrication of the pressing tools, it is possible to produce the compound so that the surface is not destroyed, so that a Nachverzinken or aftertreatment is usually unnecessary.

Die Erfindung ist vorliegend anhand der Herstellung eines Gerüstrohres beschrieben worden. Es ist allerdings auch denkbar, dass andersflächige Metallteile an Rohren montiert werden können, die andere Querschnitte, beispielsweise einen Rechteckquerschnitt aufweisen. Auch die Form der Rosette kann von der in den Figuren dargestellten Form abweichen.The invention has been described herein with reference to the preparation of a scaffold tube. However, it is also conceivable that different-area metal parts can be mounted on pipes having other cross sections, for example a rectangular cross section. The shape of the rosette may differ from the shape shown in the figures.

Claims (10)

Verfahren zum Aufbringen einer Rosette (2) auf ein Rohr (1), wobei die Rosette (2) ein Durchgangsloch (3) zum Einführen des Rohres (1) aufweist, und wobei der Randbereich (5) des Durchgangslochs (3) zunächst aus der Ebene der Rosette herausgebogen wird, so dass der lichte Abstand (C) der sich gegenüberliegenden Ränder des Durchgangslochs (3) größer ist als die Außenabmessung (D) des Rohres, und wobei nach dem Positionieren der Rosette auf dem Rohr der das Durchgangsloch (3) umgebende Randbereich (5) in die Ebene der Rosette (2) zurückgedrückt wird, wodurch sich der lichte Abstand (C1) der gegenüberliegenden Ränder (4) des Durchgangslochs (3) auf ein Maß verringert, das kleiner ist als die ursprüngliche Außenabmessung (D) des Rohres.A method for applying a rosette (2) to a pipe (1), wherein the rosette (2) has a through hole (3) for inserting the pipe (1), and wherein the edge region (5) of the through hole (3) first of the Level of the rosette is bent so that the clear distance (C) of the opposite edges of the through hole (3) is greater than the outer dimension (D) of the tube, and wherein after positioning the rosette on the tube of the through hole (3) surrounding edge region (5) is pushed back into the plane of the rosette (2), whereby the clear distance (C1) of the opposite edges (4) of the through hole (3) is reduced to a dimension which is smaller than the original outer dimension (D) of the pipe. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass das Rohr einen zylindrischen Außenumfang aufweist.A method according to claim 1, characterized in that the tube has a cylindrical outer periphery. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Rosette ein rundes Durchgangsloch (3) aufweist.A method according to claim 1 or 2, characterized in that the rosette has a round through hole (3). Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Rosette ein sternförmiges Durchgangsloch mit nach innen ragenden Kragarmen (6) aufweist, wobei der lichte Abstand (C) der Ränder (4) des Durchgangslochs durch die freien Enden (7) der Kragarme (6) bestimmt ist.A method according to claim 1 or 2, characterized in that the rosette has a star-shaped through hole with inwardly projecting cantilevers (6), wherein the clear distance (C) of the edges (4) of the through hole through the free ends (7) of the cantilevers ( 6) is determined. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Kragarme (6) aus der Ebene der Rosette herausgebogen und nach Einführen des Rohres (1) zurückgebogen werden.Method according to one of claims 1 to 4, characterized in that the cantilever arms (6) are bent out of the plane of the rosette and bent back after insertion of the tube (1). Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass das Herausbiegen des Randbereichs durch Einprägen einer um das Durchgangsloch (3) umlaufenden Sicke (5) erfolgt, so dass der Rand (4) des Durchgangslochs (3) im Wesentlichen in der Ebene der Rosette (2) liegt, während der radial weiter außen liegende Randbereich (5) aus der Ebene hinausgedrückt ist, und dass nach Einführen des Rohres (1) die Sicke (5) in die Ebene der Rosette zurückgedrückt wird.Method according to one of claims 1 to 5, characterized in that the bending out of the edge region by impressing a around the through hole (3) encircling bead (5) takes place, so that the edge (4) of the through hole (3) substantially in the plane the rosette (2) is located, while the radially outer edge region (5) is pushed out of the plane, and that after insertion of the tube (1) the bead (5) is pushed back into the plane of the rosette. Verfahren nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass der lichte Abstand (C) der Ränder (4) des Durchgangslochs (3) im Verhältnis zum Außendurchmesser (D) des Rohres (1) so gewählt ist, dass sich das Rohr (1) beim Zusammendrücken des aufgebogenen Randbereichs (5) der Rosette (2) nach innen verformt, wobei die Rosette an ihrem Aussenumfang in Richtung des Durchgangslochs abgestützt wird.Method according to one of claims 1 to 6, characterized in that the clear distance (C) of the edges (4) of the through hole (3) in relation to the outer diameter (D) of the tube (1) is selected so that the tube ( 1) upon compression of the bent-over edge region (5) of the rosette (2) deformed inwardly, wherein the rosette is supported on its outer periphery in the direction of the through-hole. Verfahren nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Materialstärke (A) der Rosette deutlich größer als die Wandstärke (B) des Rohres (1) ist und vorzugsweise mindestens doppelt bis dreimal so groß ist.Method according to one of claims 1 to 7, characterized in that the material thickness (A) of the rosette is significantly greater than the wall thickness (B) of the tube (1) and preferably at least twice to three times as large. Verfahren nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass das Maß der Verformung des Rohres etwa der halben bis einfachen Wandstärke (B) des Rohres (1) entspricht.Method according to one of claims 1 to 8, characterized in that the degree of deformation of the tube corresponds approximately to half to simple wall thickness (B) of the tube (1). Gerüststütze mit Rosette, hergestellt nach einem der Ansprüche 1 bis 9.Scaffold support with rosette, produced according to one of claims 1 to 9.
EP20120001074 2011-02-23 2012-02-17 Method for applying a rosette to a tube Active EP2492028B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE201110012097 DE102011012097A1 (en) 2011-02-23 2011-02-23 Method of applying a rosette to a pipe

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EP2492028A2 true EP2492028A2 (en) 2012-08-29
EP2492028A3 EP2492028A3 (en) 2013-02-20
EP2492028B1 EP2492028B1 (en) 2013-12-25

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ES2449486T3 (en) 2014-03-19
EP2492028A3 (en) 2013-02-20
EP2492028B1 (en) 2013-12-25

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