EP0359126B1 - Tubular element for a structure, particularly with a thin-walled design, for a three-dimensional framework - Google Patents

Tubular element for a structure, particularly with a thin-walled design, for a three-dimensional framework Download PDF

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Publication number
EP0359126B1
EP0359126B1 EP89116537A EP89116537A EP0359126B1 EP 0359126 B1 EP0359126 B1 EP 0359126B1 EP 89116537 A EP89116537 A EP 89116537A EP 89116537 A EP89116537 A EP 89116537A EP 0359126 B1 EP0359126 B1 EP 0359126B1
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EP
European Patent Office
Prior art keywords
stop
rods
rod
structural element
element according
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.)
Expired - Lifetime
Application number
EP89116537A
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German (de)
French (fr)
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EP0359126A1 (en
Inventor
Peter Preuss
Reinhard Schmidek
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mero Raumstruktur GmbH and Co
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Mero Raumstruktur GmbH and Co
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Publication date
Application filed by Mero Raumstruktur GmbH and Co filed Critical Mero Raumstruktur GmbH and Co
Priority to AT89116537T priority Critical patent/ATE70329T1/en
Publication of EP0359126A1 publication Critical patent/EP0359126A1/en
Application granted granted Critical
Publication of EP0359126B1 publication Critical patent/EP0359126B1/en
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/19—Three-dimensional framework structures
    • E04B1/1903—Connecting nodes specially adapted therefor
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/19—Three-dimensional framework structures
    • E04B1/1903—Connecting nodes specially adapted therefor
    • E04B1/1906—Connecting nodes specially adapted therefor with central spherical, semispherical or polyhedral connecting element
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/19—Three-dimensional framework structures
    • E04B2001/1924—Struts specially adapted therefor
    • E04B2001/1927—Struts specially adapted therefor of essentially circular cross section
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/19—Three-dimensional framework structures
    • E04B2001/1957—Details of connections between nodes and struts
    • E04B2001/196—Screw connections with axis parallel to the main axis of the strut
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/34—Branched
    • Y10T403/341—Three or more radiating members
    • Y10T403/344—Plural pairs of axially aligned members
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/34—Branched
    • Y10T403/347—Polyhedral

Definitions

  • the invention relates to a tubular truss rod, in particular in a thin-walled design for space trusses, the rods of which are connected at the nodes to the ends of each rod by means of head screws protruding from the ends of the rod with corresponding threaded bores, the head screws being rotatable and axially displaceable in the end regions of the rods are stored and their axial displacement to the outside is limited by a stop in the end region of each rod.
  • Such tubular truss rods are known from DE-C-874657.
  • the stops for the cap screws are formed in these rods by an end wall on a hollow conical end piece, which also contains the hole for the passage of the screw shaft.
  • These conical end pieces are welded to the end faces of each truss rod, but this increases their manufacturing costs.
  • GB-A-1189235 also discloses a connection for rods of a space framework with knots, at of the two cap screws with counter-rotating threads, which are screwed into a corresponding threaded sleeve.
  • One head screw extends with its threaded shaft through one of numerous holes into a hollow node piece and is axially fixed by means of a nut, while its angularly designed head sits in a correspondingly angular recess in the interior of the node piece in a rotationally fixed manner.
  • the second cap screw is located with its head inside the tubular truss rod and extends with its threaded shaft outwards through an opening in a conically tapered end section of the rod in question.
  • This screw is connected to this end portion of the rod by means of a nut.
  • the end sections drawn inwards in a conical shape at both ends of these trusses do not form a secure stop for the cap screw, by means of which tensile or compressive forces could reliably be transmitted, as would normally occur in space trusses.
  • this type of connection is complex because of the use of two cap screws.
  • the invention has for its object to reduce the manufacturing costs for such tubular truss bars.
  • the stop is formed in each case by bending, rolling or crimping end portions of the tubular rods inward in their cavity.
  • This type of design of the stops is cheaper than the usual welding of additional end pieces to the rod ends.
  • the bent, rolled or crimped end portions of the tubular rods also solidify their ends and also form stable stops for the Cap screws that can transmit both tensile and compressive forces in the usual order of magnitude.
  • the invention is preferably applied to truss bars with a wall thickness in the range of approximately 1-2 mm, which are used to produce relatively light trusses, for example for the exhibition area.
  • the stop can be formed in each case at approximately frustoconical end sections of the rods, which are made in one piece with the cylindrical tubular body of the rods.
  • the invention is therefore more versatile, since it is not only on truss bars with continuously cylindrical tubular bodies is limited.
  • the frusto-conical end portions of the bars can be made by known retraction techniques.
  • the head of the screws for connecting the rods to the node pieces has the shape of a truncated cone, the outer surface of which can be appropriately abutted against the inner wall of the truncated cone-shaped rod sections, these rod ends form additional stops for the cap screws, which are their axial Limit outward displacement along with the stops formed by molding end portions of the tubular rods.
  • the rods 10 can be made of relatively thin-walled metal pipes e.g. made of steel with a wall thickness of approx. 1 to 2 mm.
  • the node piece 11 has numerous threaded bores 13 intersecting with its axes in the center thereof, as well as a corresponding number of flats 14, which surround the threaded bores 13 on the outside and form contact surfaces for one end face 15 of a drive sleeve 16 for the cap screw 12.
  • the cap screw 12 is screwed with its threaded portion 17 into one of the threaded bores 13.
  • the head screw 12 sits axially displaceably with its shaft 18, but non-rotatably in the through bore 19 of the drive sleeve 16.
  • the head screw 12 is rotatably and axially displaceable in the end region of the rod 10 before the assembly described above. Their axial displacement outwards is by a stop 21 at the end of the rod 10 limited, the special training according to the invention will be explained.
  • the tubular rod 10 has frustoconical tapered end sections 22, which are produced by pulling in one piece with the cylindrical tubular body 23.
  • Each frustoconical end portion 22 of the rod 10 has a cylindrical portion 24 on the outside, which is bent through an angle of 180 ° into the cavity of the rod 10 to form the stop 21 for the cap screw 12.
  • the head 25 of the screw 12 is designed in the form of a truncated cone, the arrangement being such that, when the connection (FIG. 1) is complete, its outer surface 26 over the entire surface of the inner wall 27 of the frustoconically tapered end section 22 is present.
  • the inner wall 27 thus forms an additional stop surface for the screw 12, which limits its axial displacement to the outside.
  • the connection shown in FIG. 1 for one end of the rod 10 with a node piece 11 at the other end of the rod 10 is carried out in the same way in mirror image. In the finished connection, the drive sleeve 16 is clamped between the node piece 11 and the rod end.
  • the same parts are identified with the same reference numbers as in FIG. 1.
  • the cap screw 12 has a cylindrical head 28 and the tubular truss rods 10a to 10d are in the embodiments according to FIGS 5 continuously cylindrical from one end to the other, its outer diameter approximately corresponds to that of the drive sleeve 16.
  • the other ends of the rods 10a to 10f, not shown, are mirror images of the ends in FIGS. 2 to 7.
  • the stop 21a for the cap screw 12 has a perforated disk-shaped collar 29 which is bent inwards at a right angle from the cylindrical tubular body 23a and to which a sleeve piece 30 which extends into the interior of the rod 10a connects and which is coaxial with the axis of the rod 10a is arranged.
  • the inward-facing end edge of this sleeve piece 30 is in contact with the head 28 of the screw 12.
  • the perforated disk-shaped collar 29 with the molded sleeve piece 30 can be manufactured by means of cold forming by means of corresponding follow-up tools, which also applies analogously to the other exemplary embodiments.
  • the stop 21b (FIG. 3) for the cap screw 12 is in the form of an eyelet, which is formed in each case by rolling in an end section of the cylindrical tubular body 23b.
  • the stop 21c for the cap screw 12 according to FIG. 4 likewise represents an eyelet, which, however, in contrast to the one shown in FIG. 3, has an angular cross section.
  • FIG. 5 shows a stop 21d for the cap screw 12, which can be produced by flattening an eyelet, as shown for example in FIG. 3 at 21b.
  • the stop 21e shown in FIG. 6 for the cap screw 12 is composed, like that shown in FIG. 2, of a collar 29 in the form of a perforated disk and a sleeve piece 30 which extends into the interior of the rod.
  • the perforated disk-shaped collar 29 is formed at a right angle to the axis of the rod 10e at the outer end of the frustoconically tapered end section 22e. If the sleeve piece 30 is slightly widened at the inner end and then pressed against the perforated disk-shaped collar 29, the stop 21f shown in FIG. 7 for the cap screw 12 is obtained.
  • All of the stops 21, 21a to 21f are therefore only carried out by molding end sections of the tubular rods 10, 10a to 10f into their hollow space, the rods being able to be cylindrical tubular bodies or tubular bodies with conical end sections throughout.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Joining Of Building Structures In Genera (AREA)
  • Fishing Rods (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Prostheses (AREA)
  • Floor Finish (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Laminated Bodies (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)

Abstract

It is known to connect the ends of tubular elements (10) for three- dimensional framework to junction pieces (11) by cap screws (12). The cap screws (12) are mounted in a rotatable and axially displaceable manner in the end areas of the elements (10). Their axial movement to the outside is limited in each case by a stop (21) in the end area of each element (10). These stops were previously formed by additional parts which were fixed in the end area of the elements by, for example, welding, brazing, etc. The object of the invention is to avoid these additional parts and their complicated fastening. For this purpose, the stop (21) for the cap screws (12) is in each case formed by forming end sections (24) of the tubular elements (10) in their hollow space. In the case of tubular elements (10) having end sections (22) tapered in a frustum shape, the head (25) of the screws (12) can in addition be driven against the inner wall (27) of these end sections (22) if it is accordingly constructed in a matching frustum shape. <IMAGE>

Description

Die Erfindung bezieht sich auf einen rohrförmigen Fachwerkstab, insbesondere in dünnwandiger Ausführung für Raumfachwerke, deren Stäbe in den Knotenpunkten jeweils durch aus den Enden jedes Stabes herausragende Kopfschrauben mit entsprechende Gewindebohrungen aufweisenden Knotenstücken verbunden sind, wobei die Kopfschrauben in den Endbereichen der Stäbe drehbar und axial verschieblich gelagert sind und ihre axiale Verschiebung nach außen durch jeweils einen Anschlag im Endbereich eines jeden Stabes begrenzt ist.The invention relates to a tubular truss rod, in particular in a thin-walled design for space trusses, the rods of which are connected at the nodes to the ends of each rod by means of head screws protruding from the ends of the rod with corresponding threaded bores, the head screws being rotatable and axially displaceable in the end regions of the rods are stored and their axial displacement to the outside is limited by a stop in the end region of each rod.

Derartige rohrförmige Fachwerkstäbe sind durch die DE-C-874657 bekannt. Die Anschläge für die Kopfschrauben sind bei diesen Stäben durch eine Stirnwand an jeweils einem hohlen konischen Endstück gebildet, die auch die Bohrung für den Durchtritt des Schraubenschaftes enthält. Diese konischen Endstücke sind an den Stirnflächen eines jeden Fachwerkstabes angeschweißt, was jedoch deren Herstellungskosten erhöht.Such tubular truss rods are known from DE-C-874657. The stops for the cap screws are formed in these rods by an end wall on a hollow conical end piece, which also contains the hole for the passage of the screw shaft. These conical end pieces are welded to the end faces of each truss rod, but this increases their manufacturing costs.

Durch die GB-A-1189235 ist ferner eine Verbindung für Stäbe eines Raumfachwerkes mit Knotenstücken bekannt, bei der zwei Kopfschrauben mit gegenläufigen Gewinden, die in eine entsprechende Gewindehülse eingedreht sind, verwendet werden. Die eine Kopfschraube erstreckt sich mit ihrem Gewindeschaft durch eine von zahlreichen Bohrungen in einen hohlen Knotenstück nach außen und ist mittels einer Mutter axial fixiert, während ihr kantig ausgebildeter Kopf drehfest in einer entsprechend kantigen Aussparung im Innern des Knotenstückes sitzt. Die zweite Kopfschraube befindet sich mit ihrem Kopf im Innern des rohrförmigen Fachwerkstabs und erstreckt sich mit ihrem Gewindeschaft durch eine Öffnung in einem kegelförmig verjüngten Endabschnitt des betreffenden Stabs nach außen. Diese Schraube ist mittels einer Mutter mit diesem Endabschnitt des Stabs verbunden. Die an beiden Enden dieser Fachwerkstäbe kegelförmig nach innen gezogenen Endabschnitte bilden jedoch, besonders bei dünnwandiger Ausführung des Stabs keinen sicheren Anschlag für die Kopfschraube, durch den zuverlässig Zug- oder Druckkräfte übertragen werden könnten, wie sie üblicherweise in Raumfachwerken auftreten. Außerdem ist diese Verbindungsart wegen der Verwendung zweier Kopfschrauben aufwendig.GB-A-1189235 also discloses a connection for rods of a space framework with knots, at of the two cap screws with counter-rotating threads, which are screwed into a corresponding threaded sleeve. One head screw extends with its threaded shaft through one of numerous holes into a hollow node piece and is axially fixed by means of a nut, while its angularly designed head sits in a correspondingly angular recess in the interior of the node piece in a rotationally fixed manner. The second cap screw is located with its head inside the tubular truss rod and extends with its threaded shaft outwards through an opening in a conically tapered end section of the rod in question. This screw is connected to this end portion of the rod by means of a nut. However, the end sections drawn inwards in a conical shape at both ends of these trusses, particularly with a thin-walled design of the rod, do not form a secure stop for the cap screw, by means of which tensile or compressive forces could reliably be transmitted, as would normally occur in space trusses. In addition, this type of connection is complex because of the use of two cap screws.

Der Erfindung liegt die Aufgabe zugrunde, die Herstellungskosten für solche rohrförmigen Fachwerkstäbe zu senken.The invention has for its object to reduce the manufacturing costs for such tubular truss bars.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß der Anschlag jeweils durch Einbiegen, Einrollen oder Einbördeln von Endabschnitten der rohrförmigen Stäbe nach innen in deren Hohlraum gebildet ist. Diese Art der Ausbildung der Anschläge ist preiswerter als das bisher übliche Anschweißen zusätzlicher Endstücke an den Stabenden. Die eingebogenen, eingerollten oder eingebördelten Endabschnitte der rohrförmigen Stäbe verfestigen außerdem deren Enden und bilden ferner stabile Anschläge für die Kopfschrauben, die sowohl Zug- als auch Druckkräfte in der üblichen Größenordnung übertragen können. Bevorzugt wird die Erfindung bei Fachwerkstäben mit einer Wandstärke im Bereich von ca. 1-2 mm angewendet, die zur Herstellung von relativ leichten Raumfachwerken, beispielsweise für den Ausstellungsbereich dienen.This object is achieved in that the stop is formed in each case by bending, rolling or crimping end portions of the tubular rods inward in their cavity. This type of design of the stops is cheaper than the usual welding of additional end pieces to the rod ends. The bent, rolled or crimped end portions of the tubular rods also solidify their ends and also form stable stops for the Cap screws that can transmit both tensile and compressive forces in the usual order of magnitude. The invention is preferably applied to truss bars with a wall thickness in the range of approximately 1-2 mm, which are used to produce relatively light trusses, for example for the exhibition area.

Ausgestaltungen der Erfindung gehen aus den Unteransprüchen hervor. So kann der Anschlag jeweils an etwa kegelstumpfförmig verjüngte Endabschnitte der Stäbe ausgebildet sein, die einstückig mit den zylindrischen Rohrkörper der Stäbe ausgeführt sind. Die Erfindung ist dadurch vielseitiger einsetzbar, da sie nicht nur auf Fachwerkstäbe mit durchgehend zylindrischen Rohrkörpern beschränkt ist. Die kegelstumpfförmigen Endabschnitte der Stäbe können durch bekannte Einziehtechniken hergestellt werden.Embodiments of the invention emerge from the subclaims. Thus, the stop can be formed in each case at approximately frustoconical end sections of the rods, which are made in one piece with the cylindrical tubular body of the rods. The invention is therefore more versatile, since it is not only on truss bars with continuously cylindrical tubular bodies is limited. The frusto-conical end portions of the bars can be made by known retraction techniques.

Aus den Ansprüchen 3 bis 7 gehen verschiedene vorteilhafte Ausführungsformen der erfindungsgemäßen Anschläge für die Kopfschrauben zur Verbindung der Stäbe mit den Knotenstücken eines Raumfachwerkes hervor.Various advantageous embodiments of the stops according to the invention for the cap screws for connecting the rods to the node pieces of a space framework are evident from claims 3 to 7.

Wenn nach noch einer weiteren Ausgestaltung der Erfindung der Kopf der Schrauben zur Verbindung der Stäbe mit den Knotenstücken die Form eines Kegelstumpfes hat, dessen Mantelfläche passend gegen die Innenwand der kegelstumpfförmig verjüngten Stababschnitte anschlagbar ist, bilden diese Stabenden zusätzliche Anschläge für die Kopfschrauben, welche deren axiale Verschiebung nach außen zusammen mit den durch Einformen von Endabschnitten der rohrförmigen Stäbe gebildeten Anschlägen begrenzen.If, according to yet another embodiment of the invention, the head of the screws for connecting the rods to the node pieces has the shape of a truncated cone, the outer surface of which can be appropriately abutted against the inner wall of the truncated cone-shaped rod sections, these rod ends form additional stops for the cap screws, which are their axial Limit outward displacement along with the stops formed by molding end portions of the tubular rods.

Die Erfindung wird anschließend anhand der Zeichnungen von Ausführungsbeispielen erläutert. Es zeigen:

Fig. 1
im Schnitt das eine kegelstumpfförmig verjüngte Ende eines rohrförmigen Fachwerkstabs, verbunden über eine Kopfschraube mit einem Knotenstück, von dem gleichfalls nur ein Teil gezeigt ist und die zwischen dem Knotenstück und dem Stabende eingespannten Treibmuffe für die Kopfschraube;
Fig. 2 bis 5
im Schnitt jeweils das eine Ende eines durchgehend zylindrischen Fachwerkstabs mit einem Teil einer Kopfschraube, einer Treibmuffe und unterschiedlichen Anschlägen gem. der Erfindung;
Fig. 6 und 7
jeweils eine den Figuren 2-5 ähnliche Teil- Schnittansichten, jedoch von jeweils einem kegelstumpfförmig verjüngten Stabende mit unterschiedlichem Anschlag für die Kopfschraube.

The invention is subsequently explained with reference to the drawings of exemplary embodiments. Show it:
Fig. 1
in section one frustoconically tapered end of a tubular truss rod, connected via a cap screw to a knot piece, of which only a part is also shown, and the driving sleeve clamped between the knot piece and the rod end for the cap screw;
2 to 5
on average, one end of a continuously cylindrical truss rod with part of a cap screw, a drive sleeve and different stops acc. the invention;
6 and 7
each have a partial Sectional views, but each of a truncated cone-shaped rod end with a different stop for the cap screw.

Fig. 1 zeigt die Verbindung eines rohrförmigen Stabes 10 mit einem Knotenstück 11 durch eine Kopfschraube 12. Es handelt sich hierbei um Teile eines eine Vielzahl solcher Stäbe und Knotenstücke aufweisenden Raumfachwerks, vorzugsweise für Ausstellungsstände oder dergleichen. Die Stäbe 10 können für diese Anwendungsfälle aus relativ dünnwandigen Metallrohren z.B. aus Stahl mit einer Wandstärke von ca. 1 bis 2 mm bestehen.1 shows the connection of a tubular rod 10 to a knot piece 11 by means of a cap screw 12. These are parts of a spatial framework having a plurality of such rods and knot pieces, preferably for exhibition stands or the like. The rods 10 can be made of relatively thin-walled metal pipes e.g. made of steel with a wall thickness of approx. 1 to 2 mm.

Das Knotenstück 11 weist zahlreiche sich mit ihren Achsen in dessen Mittelpunkt schneidende Gewindebohrungen 13 sowie eine entsprechende Anzahl von Abflachungen 14 auf, welche die Gewindebohrungen 13 außen umfassen und Anlageflächen für jeweils eine Stirnfläche 15 einer Treibmuffe 16 für die Kopfschraube 12 bilden. Mittels dieser Treibmuffe 16 wird die Kopfschraube 12 mit ihrem Gewindeabschnitt 17 in eine der Gewindebohrungen 13 eingedreht. Die Kopfschraube 12 sitzt zu diesem Zweck mit ihrem Schaft 18 axial verschieblich, jedoch drehfest in der Durchgangsbohrung 19 der Treibmuffe 16. Die drehfeste Verbindung zwischen diesen Teilen erfolgt mittels eines am Schaft 18 der Kopfschraube 12 queraxial befestigten Bolzens 20, der mit einem aus dem Schaft 18 herausragenden Ende in ein axiales Langloch in der Treibmuffe 16 eingreift (nicht gezeigt).The node piece 11 has numerous threaded bores 13 intersecting with its axes in the center thereof, as well as a corresponding number of flats 14, which surround the threaded bores 13 on the outside and form contact surfaces for one end face 15 of a drive sleeve 16 for the cap screw 12. By means of this drive sleeve 16, the cap screw 12 is screwed with its threaded portion 17 into one of the threaded bores 13. For this purpose, the head screw 12 sits axially displaceably with its shaft 18, but non-rotatably in the through bore 19 of the drive sleeve 16. The rotationally fixed connection between these parts takes place by means of a bolt 20 which is fastened transversely axially on the shaft 18 of the head screw 12 and which engages with one from the shaft 18 protruding end engages in an axial slot in the drive sleeve 16 (not shown).

Die Kopfschraube 12 ist vor der oben beschriebenen Montage im Endbereich des Stabes 10 drehbar und axial verschieblich gelagert. Ihre axiale Verschiebung nach außen ist durch einen Anschlag 21 am Ende des Stabes 10 begrenzt, dessen spezielle erfindungsgemäße Ausbildung noch erläutert wird.The head screw 12 is rotatably and axially displaceable in the end region of the rod 10 before the assembly described above. Their axial displacement outwards is by a stop 21 at the end of the rod 10 limited, the special training according to the invention will be explained.

Beim Ausführungsbeispiel nach Fig. 1 weist der rohrförmige Stab 10 kegelstumpfförmig verjüngte Endabschnitte 22 auf, die durch Einziehen aus einem Stück mit dem zylindrischen Rohrkörper 23 hergestellt sind. Jeder kegelstumpfförmige Endabschnitt 22 des Stabes 10 weist nach außen einen zylindrischen Abschnitt 24 auf, der zur Ausbildung des Anschlags 21 für die Kopfschraube 12 um einen Winkel von 180° in den Hohlraum des Stabes 10 umgebogen ist.In the exemplary embodiment according to FIG. 1, the tubular rod 10 has frustoconical tapered end sections 22, which are produced by pulling in one piece with the cylindrical tubular body 23. Each frustoconical end portion 22 of the rod 10 has a cylindrical portion 24 on the outside, which is bent through an angle of 180 ° into the cavity of the rod 10 to form the stop 21 for the cap screw 12.

Wie aus Fig. 1 hervorgeht, ist der Kopf 25 der Schraube 12 in Form eines Kegelstumpfes ausgeführt, wobei die Anordnung so getroffen ist, daß dessen Mantelfläche 26 bei der fertigen Verbindung (Fig. 1) vollflächig an der Innenwand 27 des kegelstumpfförmig verjüngten Endabschnitts 22 anliegt. Die Innenwand 27 bildet somit eine zusätzliche Anschlagsfläche für die Schraube 12, welche deren axiale Verschiebung nach außen begrenzt. Der Vollständigkeit halber sei bemerkt, daß die in Fig. 1 für das eine Ende des Stabes 10 gezeigte Verbindung mit einem Knotenstück 11 am anderen Ende des Stabes 10 in gleicher Weise spiegelbildlich ausgeführt ist. Bei der fertigen Verbindung ist die Treibmuffe 16 zwischen dem Knotenstück 11 und dem Stabende eingeklemmt.As can be seen from FIG. 1, the head 25 of the screw 12 is designed in the form of a truncated cone, the arrangement being such that, when the connection (FIG. 1) is complete, its outer surface 26 over the entire surface of the inner wall 27 of the frustoconically tapered end section 22 is present. The inner wall 27 thus forms an additional stop surface for the screw 12, which limits its axial displacement to the outside. For the sake of completeness, it should be noted that the connection shown in FIG. 1 for one end of the rod 10 with a node piece 11 at the other end of the rod 10 is carried out in the same way in mirror image. In the finished connection, the drive sleeve 16 is clamped between the node piece 11 and the rod end.

In den Ausführungsbeispielen nach den Fig. 2 bis 7 sind gleiche Teile mit den selben Bezugszahlen gekennzeichnet wie in Fig. 1. Jedoch hat die Kopfschraube 12 jeweils einen zylindrischen Kopf 28 und die rohrförmigen Fachwerkstäbe 10a bis 10d sind bei den Ausführungen nach Fig. 2 bis 5 von einem Ende zum anderen durchgehend zylindrisch ausgeführt, wobei ihr Außendurchmesser etwa demjenigen der Treibmuffe 16 entspricht. Die nicht gezeigten anderen Enden der Stäbe 10a bis 10f sind spiegelbildlich zu den Enden in den Fig. 2 bis 7 ausgebildet.In the exemplary embodiments according to FIGS. 2 to 7, the same parts are identified with the same reference numbers as in FIG. 1. However, the cap screw 12 has a cylindrical head 28 and the tubular truss rods 10a to 10d are in the embodiments according to FIGS 5 continuously cylindrical from one end to the other, its outer diameter approximately corresponds to that of the drive sleeve 16. The other ends of the rods 10a to 10f, not shown, are mirror images of the ends in FIGS. 2 to 7.

Beim Ausführungsbeispiel nach Fig. 2 weist der Anschlag 21a für die Kopfschraube 12 einen vom zylindrischen Rohrkörper 23a im rechten Winkel nach innen gebogenen, lochscheibenförmigen Bund 29 auf, an dem sich ein in das Innere des Stabes 10a erstreckendes Hülsenstück 30 anschließt, welches koaxial zur Achse des Stabes 10a angeordnet ist. Der nach innen zeigende Stirnrand dieses Hülsenstücks 30 steht in Anlage mit dem Kopf 28 der Schraube 12. Der lochscheibenförmige Bund 29 mit dem angeformten Hülsenstück 30 können mittels entsprechender Folgewerkzeuge durch Kaltverformung hergestellt werden, was sinngemäß auch für die übrigen Ausführungsbeispiele gilt.In the exemplary embodiment according to FIG. 2, the stop 21a for the cap screw 12 has a perforated disk-shaped collar 29 which is bent inwards at a right angle from the cylindrical tubular body 23a and to which a sleeve piece 30 which extends into the interior of the rod 10a connects and which is coaxial with the axis of the rod 10a is arranged. The inward-facing end edge of this sleeve piece 30 is in contact with the head 28 of the screw 12. The perforated disk-shaped collar 29 with the molded sleeve piece 30 can be manufactured by means of cold forming by means of corresponding follow-up tools, which also applies analogously to the other exemplary embodiments.

Der Anschlag 21b (Fig. 3) für die Kopfschraube 12 hat die Form einer Ringöse, welche jeweils durch Einrollen eines Endabschnitts des zylindrischen Rohrkörpers 23b ausgebildet wird.The stop 21b (FIG. 3) for the cap screw 12 is in the form of an eyelet, which is formed in each case by rolling in an end section of the cylindrical tubular body 23b.

Der Anschlag 21c für die Kopfschraube 12 entsprechend Fig. 4 stellt gleichfalls eine Ringöse dar, die jedoch im Gegensatz zu der in Fig. 3 gezeigten einen kantigen Querschnitt hat.The stop 21c for the cap screw 12 according to FIG. 4 likewise represents an eyelet, which, however, in contrast to the one shown in FIG. 3, has an angular cross section.

In Fig. 5 ist ein Anschlag 21d für die Kopfschraube 12 gezeigt, der durch Flachdrücken einer Ringöse, wie sie beispielsweise in Fig. 3 bei 21b gezeigt ist, hergestellt werden kann.FIG. 5 shows a stop 21d for the cap screw 12, which can be produced by flattening an eyelet, as shown for example in FIG. 3 at 21b.

Der in Fig. 6 gezeigte Anschlag 21e für die Kopfschraube 12 setzt sich gleich dem in Fig. 2 gezeigten aus einem lochscheibenförmigen Bund 29 und ein von diesem sich in das Stabinnere erstreckendes Hülsenstück 30 zusammen. Der lochscheibenförmige Bund 29 ist bei dieser Variante der Erfindung jedoch im rechten Winkel zur Achse des Stabes 10e am äußeren Ende des kegelstumpfförmig verjüngten Endabschnitts 22e angeformt. Wenn man das Hülsenstück 30 am inneren Ende etwas aufweitet und dann gegen den lochscheibenförmigen Bund 29 drückt, erhält man den in Fig. 7 gezeigten Anschlag 21f für die Kopfschraube 12.The stop 21e shown in FIG. 6 for the cap screw 12 is composed, like that shown in FIG. 2, of a collar 29 in the form of a perforated disk and a sleeve piece 30 which extends into the interior of the rod. In this variant of the invention, however, the perforated disk-shaped collar 29 is formed at a right angle to the axis of the rod 10e at the outer end of the frustoconically tapered end section 22e. If the sleeve piece 30 is slightly widened at the inner end and then pressed against the perforated disk-shaped collar 29, the stop 21f shown in FIG. 7 for the cap screw 12 is obtained.

Sämtliche Anschläge 21, 21a bis 21f werden also lediglich durch Einformen von Endabschnitten der rohrförmigen Stäbe 10, 10a bis 10f in deren Hohlraum ausgeführt, wobei die Stäbe durchgehend zylindrische Rohrkörper oder Rohrkörper mit konischen Endabschnitten sein können.All of the stops 21, 21a to 21f are therefore only carried out by molding end sections of the tubular rods 10, 10a to 10f into their hollow space, the rods being able to be cylindrical tubular bodies or tubular bodies with conical end sections throughout.

Claims (8)

1. A tubular structural element (10), particularly in thin-walled form, for three-dimensional frameworks whose rods are each connected at the nodal points by nodal fittings having cap screws (12) projecting out of the end of each rod (10) with complementary tappings (13), the cap screws (12) being rotationally and axially displaceably mounted in the end portions of the rods, and their axial displacement in an outward direction being limited in each case by a stop (21) in the end portion of each rod (10), characterised in that the stop (21) is respectively formed by inward bending, curling or crimping of end sections (24) of the tubular rods (10) into the hollow space of said rods.
2. A tubular structural element according to Claim 1, characterised in that the stop (21, 21e, 21f) is formed in each case on approximately conically tapered end sections (22, 22e, 22f) of the rods (10, 10e, 10f) and is manufactured integrally with the cylindrical tubular members (23, 23e, 23f) of the rods (10, 10e, 10f).
3. A tubular structural element according to Claim 2, characterised in that the stop (21) comprises in each case a cylindrical end section (24) of the rods (10) bent over through an angle of 180°.
4. A tubular structural element according to Claim 1 or 2, characterised in that the stop (21a, 21e) has a collar (29) in the shape of a pierced disc and standing at right angles to the axis of the rod, and a barrel piece (30) extending from this collar (29) into the interior of the rod (10a, 10e).
5. A tubular structural element according to Claim 1 or 2, characterised in that the stop (21b) has the shape of a curled ring eye.
6. A tubular structural element according to Claim 5, characterised in that the stop (21c) is in the shape of a ring eye with an angular cross-section.
7. A tubular structural element according to 1 or 2, characterised in that the stop (21d, 21f) comprises a flat-pressed ring eye.
8. A tubular structural element according to Claim 2, characterised in that the head (25) of the screws (12) for connecting the rods (10) to the nodal fittings (11) has the shape of a truncated cone, whose shell surface (26) fits snugly against the internal wall (27) of the conically-tapered rod end sections (22).
EP89116537A 1988-09-09 1989-09-07 Tubular element for a structure, particularly with a thin-walled design, for a three-dimensional framework Expired - Lifetime EP0359126B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89116537T ATE70329T1 (en) 1988-09-09 1989-09-07 TUBULAR FRAME BAR, PARTICULARLY IN A THIN-WALLED VERSION FOR SPACE FRAMES.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3830738A DE3830738A1 (en) 1988-09-09 1988-09-09 TUBULAR SPECIALTIES, ESPECIALLY IN THIN-WALLED VERSION FOR SPACIOUS FRAMEWORKS
DE3830738 1988-09-09

Publications (2)

Publication Number Publication Date
EP0359126A1 EP0359126A1 (en) 1990-03-21
EP0359126B1 true EP0359126B1 (en) 1991-12-11

Family

ID=6362653

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89116537A Expired - Lifetime EP0359126B1 (en) 1988-09-09 1989-09-07 Tubular element for a structure, particularly with a thin-walled design, for a three-dimensional framework

Country Status (9)

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US (1) US4991371A (en)
EP (1) EP0359126B1 (en)
JP (1) JPH02142999A (en)
AT (1) ATE70329T1 (en)
AU (1) AU4086389A (en)
CA (1) CA1317081C (en)
DE (2) DE3830738A1 (en)
ES (1) ES2029104T3 (en)
GR (1) GR3003343T3 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4019243C1 (en) * 1990-06-15 1991-09-19 Mero-Raumstruktur Gmbh & Co Wuerzburg, 8700 Wuerzburg, De
DE4202249C2 (en) * 1992-01-28 1998-10-29 Erich Tausend Coaxially screwed rod connection for truss constructions
DE29506323U1 (en) * 1995-04-12 1995-06-29 Rosenkötter, Torsten, Dipl.-Kaufm., 22179 Hamburg Node connection for support systems
DE19708198C2 (en) * 1997-02-28 1999-02-04 Thyssen Polymer Gmbh Profile connection
US6887009B1 (en) 2002-10-01 2005-05-03 Conservatek Industries, Inc. Cylindrical joint and reticulated frame structure
DE102010004155A1 (en) * 2010-01-04 2011-07-07 V & M Deutschland GmbH, 40472 Connecting arrangement of hollow steel under axial pressure profiles
DE102016102643B3 (en) * 2016-02-15 2017-05-11 Stefan OGINSKI Rod-shaped assembly with Umkrempelung and method for producing the rod-shaped assembly and use of a shell of fabric layer to form the Umkrempelung

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US294344A (en) * 1884-02-26 Skeleton i ron tower
DE874657C (en) * 1943-03-12 1953-04-27 Max Dr-Ing Mengeringhausen Connection of pipe rods and knot-forming connecting pieces, especially for detachable half-timbered structures
US2546043A (en) * 1944-05-24 1951-03-20 Frank D Parmenter Tie rod for concrete forms
DE901955C (en) * 1950-07-23 1954-06-14 Mengeringhausen Max Component for trusses, in particular scaffolding made of steel pipes, with coupling device
FR1408853A (en) * 1964-06-29 1965-08-20 Assembly node for metal framework
GB1189235A (en) * 1968-01-29 1970-04-22 Peter Benjamin Wright Crighton Improvements in or relating to Connecting Devices
US3632147A (en) * 1970-04-02 1972-01-04 Julie Finger Modular frame structure and connector
DE3026689C2 (en) * 1980-07-15 1982-08-12 Mero-Raumstruktur GmbH & Co Würzburg, 8700 Würzburg Junction connection for wooden bars of trusses, especially space trusses

Also Published As

Publication number Publication date
DE58900562D1 (en) 1992-01-23
CA1317081C (en) 1993-05-04
US4991371A (en) 1991-02-12
ATE70329T1 (en) 1991-12-15
GR3003343T3 (en) 1993-02-17
DE3830738A1 (en) 1990-03-22
JPH02142999A (en) 1990-06-01
ES2029104T3 (en) 1992-07-16
EP0359126A1 (en) 1990-03-21
AU4086389A (en) 1990-03-15

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