EP1398431B1 - Verfahren zur Herstellung eines vertikalen Gerüstelementes, und durch Anwendung dieses Verfahrens hergestelltes Element - Google Patents

Verfahren zur Herstellung eines vertikalen Gerüstelementes, und durch Anwendung dieses Verfahrens hergestelltes Element Download PDF

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Publication number
EP1398431B1
EP1398431B1 EP02292249A EP02292249A EP1398431B1 EP 1398431 B1 EP1398431 B1 EP 1398431B1 EP 02292249 A EP02292249 A EP 02292249A EP 02292249 A EP02292249 A EP 02292249A EP 1398431 B1 EP1398431 B1 EP 1398431B1
Authority
EP
European Patent Office
Prior art keywords
star
strip
tubular portion
recesses
welded
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
EP02292249A
Other languages
English (en)
French (fr)
Other versions
EP1398431A1 (de
Inventor
Francis Arnault
Jean-Pierre Sarrazy
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.)
Entrepose Echafaudages
Original Assignee
Entrepose Echafaudages
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to FR0104245A priority Critical patent/FR2822734B1/fr
Priority to EP02292249A priority patent/EP1398431B1/de
Priority to ES02292249T priority patent/ES2290260T3/es
Priority to PT02292249T priority patent/PT1398431E/pt
Priority to AT02292249T priority patent/ATE368159T1/de
Application filed by Entrepose Echafaudages filed Critical Entrepose Echafaudages
Priority to DE60221393T priority patent/DE60221393T2/de
Priority to DK02292249T priority patent/DK1398431T3/da
Priority to US10/244,613 priority patent/US7090052B2/en
Priority to BR0203888-9A priority patent/BR0203888A/pt
Priority to JP2002284271A priority patent/JP4125574B2/ja
Publication of EP1398431A1 publication Critical patent/EP1398431A1/de
Application granted granted Critical
Publication of EP1398431B1 publication Critical patent/EP1398431B1/de
Priority to CY20071101244T priority patent/CY1107604T1/el
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • E04G7/302—Scaffolding bars or members with non-detachably fixed coupling elements for connecting crossing or intersecting bars or members
    • E04G7/306—Scaffolding bars or members with non-detachably fixed coupling elements for connecting crossing or intersecting bars or members the added coupling elements are fixed at several bars or members to connect
    • 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
    • Y10T403/30—Laterally related members connected by latch means, e.g., scaffold connectors

Definitions

  • the present invention relates to the field of scaffolding, and more specifically it relates to improvements made to the vertical scaffolding elements consisting of a tubular section provided with a number of radially projecting bushings distributed peripherally in a star, intended for the attachment of a horizontal transom end of the scaffolding.
  • the bushings are manufactured individually, from a metal plate bent in the form of a U-shaped stirrup, and then individually welded to the tubular section. Each edge of the U-shaped stirrup is welded to the tubular section both externally and possibly internally.
  • the documents GB-A-2 207875 and FR-A-1,553,487 certainly show arrangements of scaffolding elements comprising a star-shaped part, defining radial sleeves for fastening sleepers.
  • the document GB-A-2,207,875 discloses a device that can be manufactured by carrying out the method set forth in the preamble of claim 1.
  • star parts disclosed in these documents have a geometric conformation that does not allow easy manufacture with simple equipment by a low-skilled workforce.
  • the object of the invention is to remedy these drawbacks and to propose an improved solution that can simplify the manufacturing process, and make it shorter, simpler and therefore less expensive.
  • the invention provides a method of manufacturing a vertical scaffolding element according to the preamble of claim 1, which method is characterized according to the invention by the steps set out in the part characterized in claim 1.
  • the sleeves are no longer manufactured and individually secured to the tubular section by a large number of longitudinal welds; but they result from the realization of a star-shaped part; and moreover, this star piece is obtained by simple stamping and folding operations on an initially flat metal strip, which piece is then welded to the tubular section by a small number of arc welds that can be achieved quickly. with simple equipment, not requiring qualified personnel.
  • the fingerprints are formed as open dihedral at an angle of 2 ⁇ / n .
  • the stamped strip is folded so as to bring the lateral faces of two adjacent impressions in a substantially parallel mutual position.
  • the number of fingerprints is four and for the angle ⁇ of opening of the dihedrons formed by the fingerprints to be approximately 90 °, thanks to which one obtains a vertical scaffolding element consisting of a tubular section equipped with four sockets arranged substantially in a cross.
  • the metal strip is treated in such a way that said abutting ends of the strip which are welded are located outside the end of a socket, so that the weld seam does not interfere with the fastening of the members. complementary scaffolding on the socket.
  • the welded abutting ends of the strip it will be advantageous for the welded abutting ends of the strip to be located in an area of the star-shaped part that bears against the tubular section, so that the upper and lower ends of the weld bead are remelted during the subsequent welding of the star piece on the tubular section.
  • the invention proposes a vertical scaffolding element as defined in claim 9.
  • FIGS. 1A to 1G taking more particularly into consideration a preferred embodiment with four bushings arranged substantially in cross, that is to say diametrically opposite two by two according to two perpendicular branches, because this is the configuration which, in practice, seems to have to find the most extensive application.
  • n impressions 2 approximately dihedron with rounded edge 3 extending transversely to the extent of the strip 1.
  • Two successive two fingerprints are separated by a flat zone 5, undeformed, of the strip 1.
  • a short section 6 is pressed substantially perpendicularly to the wall 4a, 4b respectively, of the adjacent footprint 2.
  • the bending or folding operation is performed in two steps.
  • the star part 11 is in the form of a cross with opposite arms, offset by 90 °, as illustrated in FIG. 1D.
  • the short sections 6 of the ends of the strip 1 are butted to form an end of one of the branches.
  • the star piece 11 is terminated by welding the abovementioned ends 6 at 13, so that a monobloc star piece 11 consisting of a metal strip conforming to a closed contour of complex shape is obtained, as illustrated in FIG. 1E (here piece 11 has a cross section with four branches).
  • the rounded edges 3 of the dihedral impressions 2 are all positioned on a cylindrical contour of revolution, the dimensions of the various deformed / folded parts of the strip 1 being chosen so that this cylindrical contour 12 (drawn in dashes in Figure 1D) possesses substantially the same diameter as the outside diameter of a tubular mounting section.
  • the star piece 11 is put on and positioned on a metal tubular section 14 (FIG. 1F), the rounded edges 3 of the dihedrons formed by the initial impressions 2 bearing against the external face of the tubular section 14.
  • the revolution cylinder 12 for positioning the rounded edges 3 is of a diameter slightly smaller than that of the outer face of the tubular section 14 so that the star piece 11 elastically clamps the tubular section 14 on which it is inserted: the star part 11 thus remains in place without other retaining means for the next operation.
  • weld beads 15 are deposited, in two circular passes, on the upper and lower edges of the rounded edges 3, or in eight locations. in the example illustrated in Figure 1G.
  • a vertical scaffolding element generally designated by the reference 16, which consists of a tubular section 14 provided with a number n (here four) of sockets 17 radially projecting distributed peripherally star, intended for attachment of a horizontal end of the scaffolding horizontal cross.
  • n here four
  • the configuration of the star part 11 and its welding on the tubular section 14 by welding seams 15 in upper and lower arcs are clearly visible in Figure 2.
  • the method of the invention eliminates the disadvantages associated with the manufacture and joining of the individual sockets. It allows the manufacture of all sleeves 17 in integral form, the star part 11 can be obtained by implementing simple mechanical processes. In addition, its attachment to the tubular section requires two welding operations performed circularly, discontinuously, around the perimeter of the tubular section, and therefore under very simple conditions. These two welding operations can be performed in one pass by using two welding equipment, or in two successive passes.
  • the invention is not limited to this single configuration and it is possible to envisage an implementation of the method of the invention to lead to a star part 11 'whose branches 17' have a different conformation , for example a tapered conformation as schematically illustrated in FIG. 3.
  • the branches 17 ' may have convergent walls joined at their end by a flattened transverse portion 5' having a width less than the portion 5 provided for in FIGS. 1A to 1G and 2 Even the transverse portion 5 'can be reduced to nothing and the walls converge in a point-like manner. It suffices for this to adapt accordingly the stamping operation of Figure 1B (imprints 2 more or less close or even contiguous), and the folding operations of Figures 1C and 1D (approximation of the walls 4, 4b so that they converge without becoming parallel).
  • FIG. 4 schematically illustrates the conformation of a vertical element 16 'incorporating a star-shaped part 11' defining three sockets 17 '' spaced apart by 120 °, with convergent side walls according to the arrangements of FIG.
  • the abutting ends of the folded metal strip according to the method of the invention are located approximately on the end of a socket.
  • the weld bead 13 solidarisant these ends may constitute an inconvenience for hanging on the bushing of scaffolding members. It may therefore be desirable to ensure that said butted ends are outside the end of the sleeve, for example laterally or even preferably in an area of the star part 11 which bears against the tubular section. (That is to say in the re-entrant angle separating two consecutive sockets) as is clearly illustrated in FIG. 5.
  • the high and low ends of the weld 13 are re-melted during the welding of the part. in star 11 on the tubular section, which has a favorable influence on the quality of these welds.
  • the rounded edges 3 may be shaped with their concavity facing outwards, so that these concave-shaped edges 18 better fit the cylindrical outline of the tubular section 14. on which they are applied and soldered.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Ladders (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Joining Of Building Structures In Genera (AREA)
  • Adornments (AREA)
  • Luminescent Compositions (AREA)
  • Stringed Musical Instruments (AREA)

Claims (9)

  1. Verfahren zur Herstellung eines vertikalen Gerüstelements (16, 16'), welches von einem rohrförmigen Abschnitt (14) gebildet ist, auf dem ein sternförmiges Teil (11) angeschweißt ist, das eine Anzahl n von radial vorstehenden Hülsen (17, 17', 17") festlegt, die peripherisch sternförmig angeordnet sind und zur Befestigung eines horizontalen Querendes des Gerüsts ausgelegt ist, wobei das Verfahren darin besteht,
    a) einen ebenen Metallstreifen (1) von vorbestimmter Länge an n regelmäßig verteilten Stellen flach tiefzusenken, um n annähernd flächenwinkelförmige (4a, 4b) Vertiefungen (2) mit abgerundeter, quer zur Fläche des Streifens verlaufender Kante (3) zu bilden,
    b) dann den Streifen, der so an die Verbindungen (7, 10) der Seitenenden (4a, 4b) der Flächenwinkel mit den Zwischenbereichen (5) angepasst ist, so zu biegen, dass die Seitenflächen (4a, 4b) von zwei benachbarten Vertiefungen (2), die auf beiden Seiten eines Zwischenbereichs (5) des Streifens liegen, aneinander angenähert werden, und dass die abgerundeten Kanten (3) der Vertiefungen (2) auf einer zylindrischen Rotationskontur (12) positioniert werden, die im Wesentlichen den selben Durchmesser hat wie der äußere Durchmesser des rohrförmigen Abschnitts (14), um den Streifen mit seinen aneinandergefügten Enden auf sich selbst zu schließen und so ein sternförmiges Teil (11) zu bilden,
    c) das sternförmige Teil (11) mit den abgerundeten Kanten (3) der durch die Vertiefungen (2) gebildeten Flächenwinkel auf dem rohrförmigen Abschnitt zu positionieren, welche Vertiefungen (2) in Anlage auf der Außenseite des rohrförmigen Abschnitts (14) angeordnet sind, und
    d) schließlich das sternförmige Teil (11) an diesen rohrförmigen Abschnitt zu schweißen,
    dadurch gekennzeichnet, dass
    - nach Schritt b) zur Bildung des sternförmigen Teils (11) und vor Schritt c) die beiden aneinandergefügten Enden (6) des Streifens bei (13) so zusammengeschweißt werden, dass sie ein sternförmiges Einblockteil bilden, und
    - dass während Schritt d) das sternförmige Einblockteil (11) mit dem rohrförmigen Abschnitt (14) nur durch kreisförmige, unterbrochene Schweißstellen (15) solidarisiert wird, welche am oberen und unteren Rand der den rohrförmigen Abschnitt (14) berührenden abgerundeten Kanten (3) angebracht werden.
  2. Verfahren nach Anspruch 1,
    dadurch gekennzeichnet, dass
    die Vertiefungen (2) in Form von Flächenwinkeln (4a, 4b) ausgebildet sind, die in einem Winkel von 2π/n geöffnet sind.
  3. Verfahren nach Anspruch 1 oder 2,
    dadurch gekennzeichnet, dass
    der tiefgesenkte Streifen (1) so gebogen ist, dass die Seitenflächen (4a, 4b) von zwei benachbarten Vertiefungen (2) in eine zueinander im Wesentlichen parallele Position gebracht werden.
  4. Verfahren nach einem der Ansprüche 1 bis 3,
    dadurch gekennzeichnet, dass
    die Anzahl von Vertiefungen (2) vier beträgt, und dass der von den Vertiefungen (2) gebildete Öffnungswinkel α der Flächenwinkel (4a, 4b) ungefähr 90° beträgt,
    wodurch man ein vertikales Gerüstelement (16) erhält, das von einem rohrförmigen Abschnitt (14) gebildet ist, welches mit vier Hülsen (17, 17') ausgestattet ist, die im Wesentlichen kreuzförmig angeordnet sind.
  5. Verfahren nach einem der Ansprüche 1 bis 4,
    dadurch gekennzeichnet, dass
    der Metallstreifen so behandelt wird, dass die aneinandergefügten geschweißten Enden des Streifens auf dem Ende einer Hülse liegen.
  6. Verfahren nach einem der Ansprüche 1 bis 4,
    dadurch gekennzeichnet, dass
    der Metallstreifen so behandelt wird, dass die aneinandergefügten, geschweißten Enden des Streifens außerhalb des Endes einer Hülse liegen.
  7. Verfahren nach Anspruch 6,
    dadurch gekennzeichnet, dass
    die aneinandergefügten geschweißten Enden des Metallstreifens in einem Bereich des sternförmigen Teils liegen, der am rohrförmigen Abschnitt anliegt.
  8. Verfahren nach einem der Ansprüche 1 bis 7,
    dadurch gekennzeichnet, dass
    die abgerundeten Kanten (3) so gebildet werden, dass ihre Konkavität nach außen liegt, damit diese Kanten eng am rohrförmigen Abschnitt anliegen.
  9. Vertikales Gerüstelement, das durch Einsatz des Verfahrens nach einem der Ansprüche 1 bis 8 erhalten wird, das von einem rohrförmigen Abschnitt (14) gebildet ist, auf den ein sternförmiges Einblockteil (11) geschweißt ist, das eine Anzahl n von radial vorstehenden Hülsen (17, 17', 17") festlegt, die peripherisch sternförmig angeordnet sind und zur Befestigung eines horizontalen Querendes des Gerüsts ausgelegt ist, wobei das sternförmige Teil von einem tiefgesenkten Metallstreifen (1) gebildet ist, der gebogen wird und mit seinen aneinandergefügten und aneinander geschweißten Enden auf sich selbst geschlossen wird, wobei das sternförmige Teil auf einer zylindrischen Rotationskontur (12), die im Wesentlichen den selben Durchmesser hat wie der äußere Durchmesser des rohrförmigen Abschnitts (14), abgerundete Kanten (3) aufweist, wobei das sternförmige Teil (11) mit dem rohrförmigen Abschnitt (14) nur durch kreisförmige, unterbrochene Schweißstellen (15) solidarisiert wird, welche am oberen und unteren Rand der den rohrförmigen Abschnitt (14) berührenden abgerundeten Kanten (3) angebracht werden.
EP02292249A 2001-03-29 2002-09-13 Verfahren zur Herstellung eines vertikalen Gerüstelementes, und durch Anwendung dieses Verfahrens hergestelltes Element Expired - Lifetime EP1398431B1 (de)

Priority Applications (11)

Application Number Priority Date Filing Date Title
FR0104245A FR2822734B1 (fr) 2001-03-29 2001-03-29 Procede de fabrication d'un element vertical d'echafaudage, et element ainsi obtenu
PT02292249T PT1398431E (pt) 2001-03-29 2002-09-13 Processo de fabricação de um elemento vertical de edificação e elemento assim obtido
AT02292249T ATE368159T1 (de) 2001-03-29 2002-09-13 Verfahren zur herstellung eines vertikalen gerüstelementes, und durch anwendung dieses verfahrens hergestelltes element
DK02292249T DK1398431T3 (da) 2001-03-29 2002-09-13 Fremgangsmåde til fremstilling af et vertikalt stilladselement og det således opnåede element
DE60221393T DE60221393T2 (de) 2001-03-29 2002-09-13 Verfahren zur Herstellung eines vertikalen Gerüstelementes, und durch Anwendung dieses Verfahrens hergestelltes Element
ES02292249T ES2290260T3 (es) 2001-03-29 2002-09-13 Procedimiento de fabricacion de un elemento vertical de andamiaje, y elemento asi obtenido.
EP02292249A EP1398431B1 (de) 2001-03-29 2002-09-13 Verfahren zur Herstellung eines vertikalen Gerüstelementes, und durch Anwendung dieses Verfahrens hergestelltes Element
US10/244,613 US7090052B2 (en) 2001-03-29 2002-09-17 Method of manufacturing a vertical scaffolding element, and element thus obtained
BR0203888-9A BR0203888A (pt) 2001-03-29 2002-09-25 Processo de fabricação de um elemento vertical de andaime, e elemento assim obtido
JP2002284271A JP4125574B2 (ja) 2001-03-29 2002-09-27 垂直足場部材の作製方法、及びこれによって得られた部材
CY20071101244T CY1107604T1 (el) 2002-09-13 2007-09-27 Μεθοδος παραγωγης ενος κατακορυφου στοιχειου κατασκευης ικριωματος και το τοιουtoτροπως λαμβανομενο στοιχειο

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
FR0104245A FR2822734B1 (fr) 2001-03-29 2001-03-29 Procede de fabrication d'un element vertical d'echafaudage, et element ainsi obtenu
EP02292249A EP1398431B1 (de) 2001-03-29 2002-09-13 Verfahren zur Herstellung eines vertikalen Gerüstelementes, und durch Anwendung dieses Verfahrens hergestelltes Element
US10/244,613 US7090052B2 (en) 2001-03-29 2002-09-17 Method of manufacturing a vertical scaffolding element, and element thus obtained
BR0203888-9A BR0203888A (pt) 2001-03-29 2002-09-25 Processo de fabricação de um elemento vertical de andaime, e elemento assim obtido
JP2002284271A JP4125574B2 (ja) 2001-03-29 2002-09-27 垂直足場部材の作製方法、及びこれによって得られた部材

Publications (2)

Publication Number Publication Date
EP1398431A1 EP1398431A1 (de) 2004-03-17
EP1398431B1 true EP1398431B1 (de) 2007-07-25

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Application Number Title Priority Date Filing Date
EP02292249A Expired - Lifetime EP1398431B1 (de) 2001-03-29 2002-09-13 Verfahren zur Herstellung eines vertikalen Gerüstelementes, und durch Anwendung dieses Verfahrens hergestelltes Element

Country Status (10)

Country Link
US (1) US7090052B2 (de)
EP (1) EP1398431B1 (de)
JP (1) JP4125574B2 (de)
AT (1) ATE368159T1 (de)
BR (1) BR0203888A (de)
DE (1) DE60221393T2 (de)
DK (1) DK1398431T3 (de)
ES (1) ES2290260T3 (de)
FR (1) FR2822734B1 (de)
PT (1) PT1398431E (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2638365C (en) * 2008-07-29 2011-07-12 Peter J. Rogers Twist lock coupling spigot
CN102367701A (zh) * 2011-11-28 2012-03-07 张雪山 一种脚手架快速连接件
JP5753620B1 (ja) * 2014-09-11 2015-07-22 竜也 近藤 建設用仮設足場構成体
CN115182571A (zh) * 2022-07-29 2022-10-14 北京建筑大学 一种双十字盘盘扣式脚手架连接节点结构

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1521232A (fr) * 1966-04-29 1968-04-12 Kwikform Ltd Perfectionnements apportés aux échafaudages utilisés en construction

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1553487A (de) * 1968-02-09 1969-01-10
FR2376275A1 (fr) * 1976-12-31 1978-07-28 Self Lock Echafaudages Dispositif d'echafaudages tubulaires
GB2207875A (en) * 1987-08-12 1989-02-15 Homestead Socket cluster for use in scaffolding

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1521232A (fr) * 1966-04-29 1968-04-12 Kwikform Ltd Perfectionnements apportés aux échafaudages utilisés en construction

Also Published As

Publication number Publication date
FR2822734B1 (fr) 2003-08-08
ATE368159T1 (de) 2007-08-15
BR0203888A (pt) 2004-05-25
ES2290260T3 (es) 2008-02-16
US20040050622A1 (en) 2004-03-18
EP1398431A1 (de) 2004-03-17
PT1398431E (pt) 2007-10-08
DE60221393T2 (de) 2008-04-03
FR2822734A1 (fr) 2002-10-04
DK1398431T3 (da) 2007-11-12
US7090052B2 (en) 2006-08-15
DE60221393D1 (de) 2007-09-06
JP2004116237A (ja) 2004-04-15
JP4125574B2 (ja) 2008-07-30

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