EP1362151B1 - Systéme d'echafaudage comprenant des barres profilées creuses - Google Patents

Systéme d'echafaudage comprenant des barres profilées creuses Download PDF

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Publication number
EP1362151B1
EP1362151B1 EP02714025.0A EP02714025A EP1362151B1 EP 1362151 B1 EP1362151 B1 EP 1362151B1 EP 02714025 A EP02714025 A EP 02714025A EP 1362151 B1 EP1362151 B1 EP 1362151B1
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EP
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Prior art keywords
scaffolding system
section
tapered cross
hollow section
end region
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Expired - Lifetime
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EP02714025.0A
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German (de)
English (en)
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EP1362151A1 (fr
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Wilhelm Layher Verwaltungs GmbH
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Wilhelm Layher Verwaltungs GmbH
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Priority claimed from DE10112370A external-priority patent/DE10112370A1/de
Application filed by Wilhelm Layher Verwaltungs GmbH filed Critical Wilhelm Layher Verwaltungs GmbH
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    • 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
    • E04G1/14—Comprising essentially pre-assembled two-dimensional frame-like elements, e.g. of rods in L- or H-shape, with or without bracing
    • 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
    • E04G7/301—Scaffolding bars or members with non-detachably fixed coupling elements for connecting bars or members which are parallel or in end-to-end relation

Definitions

  • the present invention relates to a scaffolding system with at least two hollow profile rods which are formed as vertical stems of the scaffold system or as vertical stems of the scaffolding frames of the scaffold system, wherein the hollow profile rods each have an upper end portion and a lower end portion, a defined outer diameter and a wall thickness, the outer diameter of the upper end portion relative to the outer diameter of the lower end portion is reduced, such that a plurality of hollow profile bars are stackable and the upper end portion of a first hollow profile bar is inserted in the inserted state in the lower end portion of a second hollow section bar to a stop and between the outer wall of the upper end portion and inner wall of a permissible gap dimension is present at the lower end region, and the lower end region of the at least one second hollow profile rod has a cross-sectional taper at least in regions.
  • Such hollow profile bars are in use in a very large number.
  • the wall thickness of such known hollow profile bars in the frame system described is 3.2 mm (millimeters).
  • the material used is steel St37, for example.
  • the size of the game between the stacked scaffolding frames has a significant impact on the sustainability of the overall system, since the result of the game resulting buckling angle between the individual plug-in elements in the static model.
  • the CH 659 282 A As the closest prior art discloses a profiled bar for a system framework having an upper end portion and a lower end portion, wherein the upper end portion opposite the lower end portion has a reduced outer diameter. Superimposed hollow profile rods can be put on each other, in which the upper end portion is inserted into the lower end portion. The lower end region has punctiform depressions in the upper and lower edge region, which abut pointwise at the upper end region in the inserted state. This document discloses all the technical features of the preamble of claim 1.
  • a piping system in which the tubes have a lower end portion having a constant circumferential cross-sectional expansion.
  • an upper end region of a tube arranged therebelow can be introduced, wherein the upper end region has longitudinally extending, strip-shaped cross-sectional widenings.
  • On the inside of the upper end region there is a further L-shaped protuberance which forms a bayonet-type connection with a strip-shaped cross-sectional widening in its end region.
  • the DE 78 03 180 discloses this document a plug-in device for connecting scaffolding parts, in which a pin of a further frame part is inserted into an insertion opening of a frame part. At the free end of the pin, a cap made of elastic material is present whose largest external dimensions are larger in cross section than the clear cross section of the associated insertion opening.
  • the present invention Based on the cited prior art, the present invention, the object or the technical problem of specifying a scaffold system with hollow profile rods as vertical stems, which can be produced economically, ensures high security, has a low weight, easy and fast assembly or disassembly as in the known scaffolding system maintains and at the same time is compatible with the already existing in use hollow profile bars / scaffolding frames is formed.
  • the scaffolding system according to the invention of the type mentioned above is characterized in that the at least one second hollow profile rod has a reduced wall thickness and a higher material strength while maintaining the defined outer diameter compared to a first hollow profile bar of the system framework, wherein the cross-sectional taper is formed so that between the inner wall of the lower end region in the region of the cross-sectional taper when stacked hollow profile rods and the outer wall of the upper insertion region of the plugged hollow profile rod results in the allowable gap or a smaller gap.
  • the cross-sectional taper can be made here either by cold and / or hot deformation. As cold deformation is in particular embossing or compression into consideration.
  • the scaffold system according to the invention it is possible to use a rod - with the same external diameter - with a smaller wall diameter than the hollow profile rods used since then, in particular higher material strengths being used.
  • the successive end portion of the hollow profile bars affects the load-bearing capacity of the entire scaffolding system.
  • a game in the range of these shocks is reliably limited by the provision of the cross-sectional taper in the mixed assembly of known hollow profile bars with the hollow profile bars according to the invention to a minimum.
  • the simplicity of manufacture and assembly or disassembly is maintained.
  • the wall thickness the weight is reduced significantly. This leads to cost savings and facilitates for the scaffolder assembly or disassembly.
  • the mixing with known hollow profile bars in the context of a Scaffold system are easily achieved the load-bearing strengths of the scaffolding systems constructed with the known hollow profile bars.
  • a particularly advantageous embodiment is characterized in that the cross-sectional taper is produced such that in the lower end region, a mandrel, which has the inner contour of the hollow profile bar with cross-sectional taper in negative form, is introduced and then cold formed on a matrix applied to the outer circumference of the lower end region ,
  • the tolerance values can be significantly improved.
  • the rod supplied by the pipe manufacturer has tolerances in terms of wall thickness, ovalizations and weld bead thickening. Due to the illustrated production, these tolerances can be significantly reduced. This even leads to the extent that the gap dimension that has been permitted since then can be further reduced in the case of stacked hollow profile rods, which significantly increases the load capacity of the entire scaffolding system.
  • a preferred embodiment of the scaffolding system according to the invention is characterized in that the cross-sectional taper is formed as extending in the longitudinal direction strip-like indentation, said indentation preferably in the circumferential direction grid-shaped, in particular after a circumferential angle of 90 ° (old degree) is arranged.
  • the circumferential angle may for example be 60 ° or 45 ° or even smaller.
  • a further, particularly advantageous embodiment is characterized in that the cross-sectional taper is present as at least partially present in the circumferential direction strip-shaped indentation, which is formed according to a particularly preferred embodiment as a circumferential annular indentation.
  • the known hollow profile rods used in a variety have a wall thickness of 3.2 mm and are made of steel St37. It is with the scaffold system according to the invention possible to reduce the wall thickness of the hollow profile bars preferably to 2.7 mm, without reducing the carrying capacity of the scaffolding frames manufactured from the hollow profile bars.
  • already known hollow profile bars can be mixed with further hollow profile bars with a reduced wall thickness and a higher material strength without the assembly friendliness suffers or the load is reduced.
  • a scaffolding frame with two parallel spaced vertical stems, which are connected below the upper end portion by a crossbar and at the bottom by a transverse bar, is characterized in that a hollow profile rod of the type described above is used as a vertical handle.
  • a weight reduction of the frame weight compared to the known from the LAYHER flash scaffold scaffolding frames by about 2 kg (kilograms) is possible without the load suffers.
  • FIG. 1 shown in a side view three scaffolding frames 50 of a scaffold system have a principle known structural design.
  • a hollow profile rods 10 spaced vertical stems available as round tube profiles, which are connected to each other in the upper region via an upper cross bar 14.
  • a gusset plate 18 is welded in each case.
  • Each hollow profile bar 10 has beyond the upper cross bar 14 beyond an upper end portion 20, which has a reduced outer diameter compared to the remaining profile rod portion such that this upper end portion 20 in a lower end portion 22 of each above it scaffolding frame 50 can be introduced.
  • the lower end regions 22 of two hollow profile bars 10 of a scaffolding frame 50 are likewise connected to each other by a lower transverse bar 16 connected. This constructively gives a total of a frame structure.
  • the length of the upper end portion 20 is EO and that of the lower end portion 22 is EU. Both lengths are essentially the same size.
  • the lower end portion 22 is attached during assembly to the upper end portion 20 of the underlying hollow-section bar 10 and scaffolding frame 50 to a present below the upper end portion 20 stop 24 of the hollow section bar 10.
  • Fig. 2 shows schematically along the section AA in detail E according to Fig. 1 the nested state of an upper end portion 20 and a lower end portion 22, which is based on the geometry of a hollow section bar 10 with a predetermined outer diameter DA in the rod longitudinal region and a predetermined (reduced) outer diameter DR in the upper end portion 22, which is respectively determined or fixed by the already known, on the market hollow section bar.
  • the maintenance of the outer diameter of the known scaffold system ensures that even in the lower end region - despite the cross-sectional taper - the usual pipe coupling elements for connecting other scaffolding bars, such as diagonals, can be used.
  • Fig. 3a is in a first embodiment, the cross-sectional taper 30.1 as in the longitudinal direction, substantially over the entire length EU of the lower end portion 22 extending longitudinal strips 30.1 formed, the indentation is chosen so large that an allowable gap width S is achieved.
  • each offset by 90 ° (Altgrad) exists in the circumferential direction of the longitudinal strip 30.1.
  • FIG. 4 An example known in the prior art is in Fig. 4 shown.
  • the cross-sectional taper is in this case formed as a circumferential annular indentation 30.2, which is present in each case at the upper edge region and lower edge region of the lower end region 22.
  • the annular indentation is formed so that between the inner wall of the annular indentation 30.2 with inserted upper end portion 20 and the inner wall of the underlying hollow section bar 10, a permissible gap S is present.
  • FIGS. 5a and 5b A well-known in the art another example is in the FIGS. 5a and 5b shown.
  • the cross-sectional tapering is shown as a punctiform indentation 30.3, which is circumferentially present in a grid of 90 ° both in the upper edge region and in the lower edge region of the lower end region 22.
  • the indentation depth of the punctiform recess 30.3 is chosen so that between the inner wall and the outer wall of the upper end portion 20 of the lower-side hollow-section bar 10 is an allowable clearance.
  • cross-sectional tapers represent only exemplary embodiments. Suitable cross-sectional tapers are all solutions which produce an allowable gap S and nevertheless ensure a simple plug-on operation of adjacent hollow profile bars 10 or scaffolding frames 50.

Claims (21)

  1. Système d'échafaudage avec au moins deux barres profilées creuses (10) réalisées sous la forme de tiges verticales du système d'échafaudage ou sous la forme de tiges verticales du cadre d'échafaudage (50) du système d'échafaudage, les barres profilées creuses (10) comportant respectivement une zone d'extrémité supérieure (20) et une zone d'extrémité inférieure (22), un diamètre extérieur (DA) défini et une épaisseur de paroi (t), le diamètre extérieur (DR) de la zone d'extrémité supérieure (20) étant réduit par rapport au diamètre extérieur (DA) de la zone d'extrémité inférieure (22), de telle sorte que plusieurs barres profilées creuses (10) puissent être enfilées les unes sur les autres et que la zone d'extrémité supérieure (20) d'une première barre de profilé creux (10) soit introduite dans l'état enfiché dans la zone d'extrémité inférieure (22) d'une deuxième barre de profilé creux (10) jusqu'à une butée (24) et qu'un écartement (S) admis soit présent entre la paroi extérieure de la zone d'extrémité supérieure (20) et la paroi intérieure de la zone d'extrémité inférieure (22) et que la zone d'extrémité inférieure (22) de l'au moins une deuxième barre de profilé creux (10) comporte au moins dans certaines zones un rétrécissement de section transversale (30.1) ;
    caractérisé en ce que :
    - l'au moins une deuxième barre de profilé creux (10) comporte, en maintenant le diamètre extérieur (DA) défini, une épaisseur de paroi (t) réduite et une résistance de matériau supérieure par rapport à une première barre de profilé creux (10) de l'échafaudage systémique ;
    - le rétrécissement de section transversale (30.1) étant réalisé de telle sorte que l'écartement (S) admis ou un écartement plus petit apparaît entre la paroi intérieure de la zone d'extrémité inférieure (22) dans la zone du rétrécissement de section transversale (30.1) en cas de barres profilées creuses (10) enfilées les unes sur les autres et de la paroi extérieure de la zone d'enfichage (20) supérieure de la barre de profilé creux (10) enfilée.
  2. Système d'échafaudage selon la revendication 1, caractérisé en ce que :
    - le rétrécissement de section transversale (30.1, ...) est fabriqué par déformation ou froid et/ou à chaud.
  3. Système d'échafaudage selon la revendication 2, caractérisé en ce que :
    - le rétrécissement de section transversale (30.1, ...) est fabriqué par estampage.
  4. Système d'échafaudage selon la revendication 2, caractérisé en ce que :
    - le rétrécissement de section transversale est fabriqué par poinçonnage.
  5. Système d'échafaudage selon la revendication 2, caractérisé en ce que :
    - le rétrécissement de section transversale est fabriqué de telle sorte qu'un mandrin est introduit dans la zone d'extrémité inférieure, ledit mandrin comportant en forme négative le contour intérieur de la barre de profilé creux (10) avec un rétrécissement de section transversale puis que la zone d'extrémité est déformée à froid via une matrice appliquée sur la périphérie extérieure.
  6. Système d'échafaudage selon l'une quelconque des revendications précédentes ou plusieurs d'entre elles, caractérisé en ce que :
    - le rétrécissement de section transversale (30.1) est réalisé sous la forme d'un enfoncement en forme de bande s'étendant dans la direction longitudinale de la barre de profilé creux.
  7. Système d'échafaudage selon la revendication 6, caractérisé en ce que :
    - le rétrécissement de section transversale (30.1) est disposé dans la direction périphérique de la barre de profilé creux en forme de trame, notamment selon un angle de périphérie de respectivement 90° (degrés), ou de 60° ou 45° ou moins.
  8. Système d'échafaudage selon la revendication 6 et/ou 7, caractérisé en ce que :
    - le rétrécissement de section transversale (30.1) s'étend pour l'essentiel sur l'ensemble de la longueur (EU) de la zone d'extrémité inférieure (22) de la barre de profilé creux (10).
  9. Système d'échafaudage selon l'une quelconque des revendications 1 à 5 ou plusieurs d'entre elles, caractérisé en ce que :
    - le rétrécissement de section transversale (30.3) est réalisé sous la forme d'un enfoncement en forme de point.
  10. Système d'échafaudage selon la revendication 9, caractérisé en ce que :
    - le rétrécissement de section transversale (30.3) est disposé en forme de trame en périphérie et/ou dans la direction longitudinale de la barre de profilé creux (10).
  11. Système d'échafaudage selon la revendication 10, caractérisé en ce que :
    - le rétrécissement de section transversale (30.3) est présent quatre, six ou huit fois dans la direction périphérique.
  12. Système d'échafaudage selon l'une quelconque des revendications 9 à 11 ou plusieurs d'entre elles, caractérisé en ce que :
    - les rétrécissements de section transversale (30.3) sont présents dans la zone de bordure supérieure et inférieure de la zone d'extrémité inférieure (22) de la barre de profilé creux (10).
  13. Système d'échafaudage selon l'une quelconque des revendications 1 à 5 ou plusieurs d'entre elles, caractérisé en ce que :
    - le rétrécissement de section transversale (30.2) est présent sous la forme d'un enfoncement en forme de bande présent au moins dans certaines zones dans la direction périphérique de la barre de profilé creux.
  14. Système d'échafaudage selon la revendication 13, caractérisé en ce que :
    - le rétrécissement de section transversale (30.2) est réalisé sous la forme d'un enfoncement de forme annulaire.
  15. Système d'échafaudage selon la revendication 13 et/ou 14, caractérisé en ce que :
    - le rétrécissement de section transversale (30.2) est présent au moins dans la zone de bordure supérieure et inférieure de la zone d'extrémité inférieure (22) de la barre de profilé creux (10).
  16. Système d'échafaudage selon l'une quelconque des revendications précédentes ou plusieurs d'entre elles, caractérisé en ce que :
    - l'épaisseur de paroi de la barre de profilé creux se situe dans la zone comprise entre 2,5 à 3,0 mm (millimètres), notamment 2,7 mm (millimètres).
  17. Système d'échafaudage selon l'une quelconque des revendications précédentes ou plusieurs d'entre elles, caractérisé en ce que :
    - la barre de profilé creux est en ST52.
  18. Système d'échafaudage selon la revendication 1, caractérisé en ce que :
    - le rétrécissement de section transversale est réalisé par au moins un élément saillant disposé au niveau de la paroi intérieure de la barre de profilé creux (10).
  19. Système d'échafaudage selon l'une quelconque des revendications précédentes ou plusieurs d'entre elles, caractérisé en ce que :
    - la barre de profilé creux (10) est réalisée sous la forme d'un profilé creux de tube rond.
  20. Système d'échafaudage selon l'une quelconque des revendications précédentes ou plusieurs d'entre elles, caractérisé en ce que :
    - la longueur (EU) de la zone d'extrémité inférieure (22) avec le rétrécissement de section transversale (30.1, ...) se situe dans la zone comprise entre 100 mm (millimètres) et 200 mm, notamment 150 mm.
  21. Système d'échafaudage selon l'une quelconque des revendications précédentes ou plusieurs d'entre elles, caractérisé en ce que :
    - la zone d'extrémité inférieure (22) comporte le diamètre extérieur (DA) défini dans la zone située à l'extérieur des rétrécissements de section transversale.
EP02714025.0A 2001-02-22 2002-02-19 Systéme d'echafaudage comprenant des barres profilées creuses Expired - Lifetime EP1362151B1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE20103130U 2001-02-22
DE20103130 2001-02-22
DE10112370A DE10112370A1 (de) 2001-02-22 2001-03-15 Hohlprofilstab für ein Gerüstsystem
DE10112370 2001-03-15
PCT/DE2002/000568 WO2002066768A1 (fr) 2001-02-22 2002-02-19 Barre profilee creuse pour un systeme d'echafaudage

Publications (2)

Publication Number Publication Date
EP1362151A1 EP1362151A1 (fr) 2003-11-19
EP1362151B1 true EP1362151B1 (fr) 2017-01-25

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EP (1) EP1362151B1 (fr)
PL (1) PL200251B1 (fr)
WO (1) WO2002066768A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202006015586U1 (de) 2006-10-11 2008-02-21 Wilhelm Layher Verwaltungs-Gmbh Vertikalrahmenelement aus Metall
DE102008045795A1 (de) 2008-09-05 2010-03-18 Hünnebeck Group GmbH Vertikalrahmen für Gerüste mit oben offenem Profil als oberer Horizontalstrebe
DE202008011819U1 (de) 2008-09-05 2008-11-06 Hünnebeck Group GmbH Vertikalrahmen für Gerüste mit oben offenem Profil als oberer Horizontalstrebe
DE102011001796A1 (de) 2011-04-05 2012-10-11 Wilhelm Layher Verwaltungs-Gmbh Gerüststiel
WO2012163340A1 (fr) 2011-06-01 2012-12-06 Wilhelm Layher Verwaltungs-Gmbh Ensemble comprenant une pièce d'échafaudage et un élément d'échafaudage vertical
DE102013108326A1 (de) * 2013-08-02 2015-02-05 Peri Gmbh Gerüstrohr eines Baugerüsts und Gerüstelement
DE202017000448U1 (de) 2017-01-26 2017-03-08 Artinger Gerüstbau e.K. Rahmen-Modulgerüstverbindung

Citations (4)

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Publication number Priority date Publication date Assignee Title
DE7803180U1 (de) 1978-02-03 1978-05-18 Schliephacke, Heinrich, Dipl.-Ing., 4030 Ratingen Steckvorrichtung zur verbindung von geruestteilen
CH659282A5 (fr) 1982-01-25 1987-01-15 Wallther Eng Ab Dispositif d'assemblage d'elements d'echafaudage allonges.
DE19630225A1 (de) * 1995-07-27 1997-01-30 Sgb Holdings Rohrsystem, insbesondere zur Anwendung in einer Gerüstkonstruktion, sowie Rohre für ein Rohrsystem
DE19547382A1 (de) 1995-12-19 1997-06-26 Krupp Foerdertechnik Gmbh Kupplung für die Verbindung von stabförmigen Teilen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7803180U1 (de) 1978-02-03 1978-05-18 Schliephacke, Heinrich, Dipl.-Ing., 4030 Ratingen Steckvorrichtung zur verbindung von geruestteilen
CH659282A5 (fr) 1982-01-25 1987-01-15 Wallther Eng Ab Dispositif d'assemblage d'elements d'echafaudage allonges.
DE19630225A1 (de) * 1995-07-27 1997-01-30 Sgb Holdings Rohrsystem, insbesondere zur Anwendung in einer Gerüstkonstruktion, sowie Rohre für ein Rohrsystem
DE19547382A1 (de) 1995-12-19 1997-06-26 Krupp Foerdertechnik Gmbh Kupplung für die Verbindung von stabförmigen Teilen

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
ROLOFF, PAUL: "Das Stahlrohrgerüst", 1957, ULLSTEIN FACHVERLAG, Ullstein A.G., Berlin, article "Die Regel-Stahlrohrgerüste nach DIN 4420", pages: 22-43,56 - 61, XP055431639
VÖLKEL, G.E. ET AL.: "Untersuchung des Einflusses der Wanddicke von Gerüstrohren auf die Drehwinkelsteifigkeit bei Verbindungen mit Normalkupplungen. Abteilung 2 Baukonstruktionen", 10 June 1998, FRAUNHOFER IRB VERLAG, Stuttgart, article "Forschungsbericht", XP055431650

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PL362388A1 (en) 2004-11-02
EP1362151A1 (fr) 2003-11-19
WO2002066768A1 (fr) 2002-08-29
PL200251B1 (pl) 2008-12-31

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