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WO2006097137A1 - Long carrier element, especially a side rail for a ladder - Google Patents

Long carrier element, especially a side rail for a ladder Download PDF

Info

Publication number
WO2006097137A1
WO2006097137A1 PCT/EP2005/011396 EP2005011396W WO2006097137A1 WO 2006097137 A1 WO2006097137 A1 WO 2006097137A1 EP 2005011396 W EP2005011396 W EP 2005011396W WO 2006097137 A1 WO2006097137 A1 WO 2006097137A1
Authority
WO
WIPO (PCT)
Prior art keywords
aluminum
sides
narrow
ladder
element according
Prior art date
Application number
PCT/EP2005/011396
Other languages
German (de)
French (fr)
Inventor
Ruedi Kälin
Original Assignee
Kaelin Ruedi
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
Application filed by Kaelin Ruedi filed Critical Kaelin Ruedi
Publication of WO2006097137A1 publication Critical patent/WO2006097137A1/en

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C7/00—Component parts, supporting parts, or accessories
    • E06C7/10—Reinforcements for ladders
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
    • E04C3/06—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal with substantially solid, i.e. unapertured, web
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C7/00—Component parts, supporting parts, or accessories
    • E06C7/08—Special construction of longitudinal members, or rungs or other treads
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
    • E04C2003/0404—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
    • E04C2003/0408—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by assembly or the cross-section
    • E04C2003/0413—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by assembly or the cross-section being built up from several parts
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
    • E04C2003/0404—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
    • E04C2003/0408—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by assembly or the cross-section
    • E04C2003/0413—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by assembly or the cross-section being built up from several parts
    • E04C2003/0417—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by assembly or the cross-section being built up from several parts demountable
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
    • E04C2003/0404—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
    • E04C2003/0426—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by material distribution in cross section
    • E04C2003/043—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by material distribution in cross section the hollow cross-section comprising at least one enclosed cavity
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
    • E04C2003/0404—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
    • E04C2003/0443—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by substantial shape of the cross-section
    • E04C2003/0465—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by substantial shape of the cross-section square- or rectangular-shaped

Definitions

  • Elongated support element in particular a spar for a ladder
  • the invention relates to an elongate support element, in particular a spar for a ladder, according to the preamble of claim 1.
  • the spars are formed as a substantially rectangular hollow parts, each with two longitudinal and two narrow sides and the rungs are directed at right angles to the longitudinal sides.
  • the spars When climbing the ladder, the spars are subjected to a bending stress in a plane parallel to the longitudinal sides, which depends on the inclination of the ladder.
  • Similar support elements can also be used, for example, as suspension profiles for sun blinds.
  • the present invention has for its object to provide a support element of the type mentioned, which has an improved flexural stiffness or strength.
  • the tensioned narrow side of the support element according to the invention comprises a part or a support extending over its entire length from a material, preferably steel, which has greater strength and rigidity than aluminum
  • the flexural rigidity or strength of the support element can be considerably improved which makes a reduction of his overall profile possible and thus brings material and thus cost savings.
  • the reduction in volume not only saves material but also logistical advantages.
  • the total weight of, for example, a conductor provided with the support elements or bars configured according to the invention can be reduced and cost savings of up to 20% can be achieved.
  • FIG. 1 shows a first embodiment of a support element according to the invention in cross section.
  • FIG. 2 shows a second embodiment of a support element according to the invention in cross section
  • FIG. 3 shows a third embodiment of a support element according to the invention in cross section
  • FIG. 4a a top view of two U-shaped aluminum profiles that can be plugged together to form a support element
  • Figure 5 is a plan view of the U-shaped aluminum profiles of Figure 4a mated with a ladder rung.
  • FIG. 6a shows two L-shaped aluminum profiles that can be plugged together to form a support element, with a ladder rung in plan view
  • Fig. 6b the L-shaped aluminum profiles of Fig. 6a plugged together with the ladder rung.
  • Fig. L is an elongate support member 1, for example a spar of a ladder, shown in cross section.
  • the support element 1 is designed as a substantially rectangular hollow part, which comprises an aluminum hollow profile 2 with two longitudinal sides 3, 4 and two narrow sides 5, 6.
  • the support element 1, for example, the spar of a ladder is exposed to a bending load in the direction of arrow A of FIG. 1 bending in a plane parallel to the longitudinal sides 3, 4, in which the upper narrow side 5 on pressure and the lower narrow side 6 to train is claimed.
  • both narrow sides 5, 6 are provided with a support 7, 8 made of a greater strength and rigidity than aluminum, which in the embodiment shown in FIG is formed in each case as a on the outside of the respective narrow side 5, 6 fixed steel band.
  • the fixation is done with advantage by bending in extension of the longitudinal sides 3, 4 arranged tabs 9 of the hollow section 2 to the narrow sides 5, 6, with additional crimping (eg notches) or other mechanical connections (eg rivet joints) to prevent mutual displacement are provided between the steel strip 7 and 8 and the hollow section 2. It would be quite possible to fix the steel strips on the inside of the hollow profile, but the variant shown in Fig. 1 is particularly easy to manufacture.
  • a support member 10 is shown with a likewise rectangular, longitudinal sides 13, 14 and narrow sides 15, 16 having hollow profile 12 made of aluminum. It is in turn a support of a greater strength and rigidity compared to aluminum having material provided at least for the tensile narrow side 16.
  • both narrow sides 15, 16 are reinforced by a steel wire 17 is fixed in all corner regions of the narrow / long sides.
  • the steel wires 17 are retained by bending tabs 19 provided on the inside of the hollow section 12, with additional crimp connections or other mechanical connections for preventing mutual displacements between the respective steel wire 17 and the hollow section 12. It can e.g. Roughened wires 17 are used.
  • FIG. 3 Another embodiment of a support element 20 is shown in Fig. 3.
  • the support member 20 is formed as a substantially rechteckförmi- ger hollow part
  • the longitudinal sides 23, 24 are formed by two U-shaped profiles 21, 22 made of aluminum.
  • the longitudinal sides 23, 24 are formed by two U-shaped profiles 21, 22 made of aluminum.
  • each other Legs 23a, 24a and 23b, 24b of the aluminum profiles 21, 22 are each a steel strip 25, 26 fixed, which forms a part of the narrow sides.
  • the steel strips 25, 26 are preferably pressed into corresponding recesses 27 of the opposite legs 23a, 24a and 23b, 24b.
  • the tension-loaded narrow side of the support elements 1, 10, 20 comprises a material or preferably a steel which has greater strength and rigidity than aluminum over its entire length
  • the flexural rigidity can or strength of the support element can be significantly improved, which makes a reduction of its overall profile possible and material and thus also brings cost savings.
  • the reduction in volume not only saves material but also logistical advantages.
  • the total weight of, for example, a conductor provided with the support elements or bars configured according to the invention can be reduced and cost savings of up to 20% can be achieved.
  • the support elements or bars for a ladder can also be assembled from two U-shaped aluminum profiles 31, 32, including the legs 31a, 31b, 32a, 32b of these profiles with corresponding snap elements are equipped.
  • the narrow sides of the assembled from the profiles 31, 32 hollow part (or at least the zugbe pipete narrow side or profile) are in turn equipped with the inventive support of a greater compared to aluminum strength and stiffness material, preferably steel.
  • FIG. 4 a shows only the tabs 33 associated with the inner sides of the profiles 31, 32, which are used for fastening supply of steel wires in the corner regions of the profiles 31, 32 are provided.
  • the mating profile legs which form the longitudinal sides of the spar can, according to FIG. 4 b, be provided with suitable recesses 37, 38 for receiving a ladder rung, which has a cross-section corresponding to the recesses 37, 38, and which forms the two U-shaped mating pieces Profile 31, 32 can be clamped between them, which is schematically indicated in Fig. 5, where the ladder rung is designated 40.
  • the ladder rung 40 or the profiles 3 1, 32 may also be associated with each other corresponding latching elements, with which the rung 40 when mating the profiles 31, 32 is fixed in its longitudinal direction.
  • a spar can also be made of two in cross-section L-shaped aluminum profiles 41, 42 can be plugged together, wherein the mating in the longitudinal direction S of the rung 40 (Fig. 6a) or in the transverse direction P (Fig. 6b), as in the U-shaped profiles 31, 32 of FIG. 4b and 5, can take place.
  • a support made of a greater strength and stiffness compared to aluminum material, preferably steel, provided for the spar narrow sides 45, 46, and the longitudinal sides 43, 44 can recesses for receiving have the ladder rung 40, wherein the laying of the rung 40 from a central position to the pressure-loaded narrow side 45 toward the power is advantageous.
  • support elements according to the invention would also be conceivable. Also could be instead steel other materials or metals for the design or reinforcement of the narrow sides use.
  • the support elements according to the invention are not only suitable for ladder stiles, but everywhere where similar aluminum profiles are used and bending or tensile strength is obtained, eg in the case of sun blinds, etc.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Ladders (AREA)

Abstract

The invention relates to a long carrier element (1), especially a side rail for a ladder. Said carrier element is embodied as an essentially rectangular hollow part consisting of at least one aluminium profiled element (2), and comprises two longitudinal sides and two narrow sides (3, 4, 5, 6). The inventive carrier element is thus exposed to a flexural strain in a plane parallel to the longitudinal sides (3, 4). At least the narrow sides (5, 6) under tensile stress comprise a supporting element (7, 8) consisting of a material, preferably steel, which is more resistant and more rigid than aluminium. In this way, the bending rigidity or resistance of the carrier element is significantly improved, reducing the entire profile thereof, and saving on materials and cost.

Description

Längliches Tragelement, insbesondere ein Holm für eine Leiter Elongated support element, in particular a spar for a ladder
Die Erfindung betrifft ein längliches Tragelement, insbesondere ein Holm für eine Leiter, gemäss dem Oberbegriff des Anspruches 1.The invention relates to an elongate support element, in particular a spar for a ladder, according to the preamble of claim 1.
Es. sind Leiter mit mindestens zwei Tragelementen bzw. Holmen und dazwischen angeordneten Sprossen bekannt, wobei die Holme als im wesentlichen rechteckförmige Hohlteile mit je zwei Längs- und je zwei Schmalseiten ausgebildet und die Sprossen rechtwinklig zu den Längsseiten gerichtet sind. Beim Besteigen der Leiter werden die Holme einer Biegebeanspruchung in einer zu den Längsseiten parallelen Ebene ausgesetzt, die von der Schrägstellung der Leiter abhängig ist. Ähnliche Tragelemente können auch beispielsweise als Aufhängeprofile bei Sonnenstoren Einsatz finden.It. are ladder with at least two support elements or bars and interposed rungs known, the spars are formed as a substantially rectangular hollow parts, each with two longitudinal and two narrow sides and the rungs are directed at right angles to the longitudinal sides. When climbing the ladder, the spars are subjected to a bending stress in a plane parallel to the longitudinal sides, which depends on the inclination of the ladder. Similar support elements can also be used, for example, as suspension profiles for sun blinds.
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, ein Tragelement der eingangs genannten Art zu schaffen, das eine verbesserte Durchbiege- steifigkeit bzw. Festigkeit aufweist.The present invention has for its object to provide a support element of the type mentioned, which has an improved flexural stiffness or strength.
Diese Aufgabe wird erfindungsgemäss durch ein Tragelement mit den Merkmalen des Anspruches 1 gelöst.This object is achieved by a support member having the features of claim 1.
Weitere bevorzugte Ausgestaltungen des erfindungsgemässen Tragelementes bilden den Gegenstand der abhängigen Ansprüche.Further preferred embodiments of the inventive support element form the subject of the dependent claims.
Dadurch, dass zumindest die zugbelastete Schmalseite des erfindungsgemässen Tragelementes einen sich über ihre Gesamtlänge erstreckenden Teil oder eine Stütze aus einem im Vergleich zu Aluminium grossere Festigkeit und Steifigkeit aufweisenden Material, vorzugsweise Stahl, um- fasst, kann die Durchbiegesteifigkeit bzw. Festigkeit des Tragelementes erheblich verbessert werden, was eine Reduktion seines Gesamtprofils möglich macht und Material- und somit auch Kosteneinsparungen mit sich bringt. Die Reduktion des Volumens bringt neben der Materialeinsparung auch logistische Vorteile. Schliesslich kann auch das Gesamtgewicht beispielsweise einer mit den erfindungsgemäss ausgestalteten Tragelementen bzw. Holmen versehener Leiter reduziert und Kosteneinsparungen bis zu 20% erreicht werden.Due to the fact that at least the tensioned narrow side of the support element according to the invention comprises a part or a support extending over its entire length from a material, preferably steel, which has greater strength and rigidity than aluminum, the flexural rigidity or strength of the support element can be considerably improved which makes a reduction of his overall profile possible and thus brings material and thus cost savings. The reduction in volume not only saves material but also logistical advantages. Finally, the total weight of, for example, a conductor provided with the support elements or bars configured according to the invention can be reduced and cost savings of up to 20% can be achieved.
Die Erfindung wird nachfolgend anhand der Zeichnung näher erläutert. Es zeigen: Fig. 1 ein erstes Ausführungsbeispiel eines erfindungsgemässen Tragelementes im Querschnitt;The invention will be explained in more detail with reference to the drawing. Show it: 1 shows a first embodiment of a support element according to the invention in cross section.
Fig. 2 ein zweites Ausführungsbeispiel eines erfindungsgemässen Tragelementes im Querschnitt;2 shows a second embodiment of a support element according to the invention in cross section;
Fig. 3 ein drittes Ausführungsbeispiel eines erfindungsgemässen Tragelementes im Querschnitt;3 shows a third embodiment of a support element according to the invention in cross section;
Fig. 4a zwei zu einem Tragelement zusammensteckbare U-förmige Aluminium-Profile in Draufsicht;FIG. 4a a top view of two U-shaped aluminum profiles that can be plugged together to form a support element; FIG.
Fig. 4b die U-förmigen Aluminium-Profile nach Fig. 4a in Seitenansicht;4b, the U-shaped aluminum profiles of Figure 4a in side view.
Fig. 5 in Draufsicht die U-förmigen Aluminium-Profile nach Fig. 4a zusammengesteckt mit einer Leiter-Sprosse;Figure 5 is a plan view of the U-shaped aluminum profiles of Figure 4a mated with a ladder rung.
Fig. 6a zwei zu einem Tragelement zusammensteckbare L-förmige Aluminium-Profile mit einer Leiter-Sprosse in Draufsicht; undFIG. 6a shows two L-shaped aluminum profiles that can be plugged together to form a support element, with a ladder rung in plan view; FIG. and
Fig. 6b die L-förmigen Aluminium-Profile nach Fig. 6a mit der Leiter- Sprosse zusammengesteckt.Fig. 6b, the L-shaped aluminum profiles of Fig. 6a plugged together with the ladder rung.
In Fig. l ist ein längliches Tragelement 1, beispielsweise ein Holm einer Leiter, im Querschnitt gezeigt. Das Tragelement 1 ist als ein im wesentlichen rechteckförmiger Hohlteil ausgebildet, der ein Aluminium-Hohlprofil 2 mit zwei Längsseiten 3, 4 und zwei Schmalseiten 5, 6 umfasst. Das Tragelement 1, z.B. der Holm einer Leiter, wird bei einer Kraftbelastung in Pfeilrichtung A nach Fig. 1 einer Biegebeanspruchung in einer zu den Längsseiten 3, 4 parallelen Ebene ausgesetzt, bei der die obere Schmalseite 5 auf Druck und die untere Schmalseite 6 auf Zug beansprucht wird. Erfindungsgemäss ist zumindest die zugbelastete Schmalseite 6, gemäss Fig. 1 beide Schmalseiten 5, 6 mit einer Stütze 7, 8 aus einem im Vergleich zu Aluminium grossere Festigkeit und Steifigkeit aufweisenden Material versehen, die bei dem in Fig. 1 gezeigten Ausführungsbeispiel jeweils als ein an der Aussenseite der jeweiligen Schmalseite 5, 6 fixierter Stahlband ausgebildet ist. Die Fixierung erfolgt mit Vorteil durch Umbiegen von in Verlängerung der Längsseiten 3, 4 angeordneten Lappen 9 des Hohlprofils 2 zu der Schmalseiten 5, 6, hin, wobei zusätzliche Quetschverbindungen (z.B. Einkerbungen) oder andere mechanische Verbindungen (z.B. Nietverbindungen) zum Verhindern von gegenseitigen Verschiebungen zwischen dem Stahlband 7 bzw. 8 und dem Hohlprofil 2 vorgesehen sind. Es wäre durchaus möglich, die Stahlbänder auch auf der Innenseite des Hohlprofils zu fixieren, allerdings ist die in Fig. 1 dargestellte Variante herstellungstechnisch besonders einfach.In Fig. L is an elongate support member 1, for example a spar of a ladder, shown in cross section. The support element 1 is designed as a substantially rectangular hollow part, which comprises an aluminum hollow profile 2 with two longitudinal sides 3, 4 and two narrow sides 5, 6. The support element 1, for example, the spar of a ladder is exposed to a bending load in the direction of arrow A of FIG. 1 bending in a plane parallel to the longitudinal sides 3, 4, in which the upper narrow side 5 on pressure and the lower narrow side 6 to train is claimed. According to the invention, at least the tensioned narrow side 6, according to FIG. 1, both narrow sides 5, 6 are provided with a support 7, 8 made of a greater strength and rigidity than aluminum, which in the embodiment shown in FIG is formed in each case as a on the outside of the respective narrow side 5, 6 fixed steel band. The fixation is done with advantage by bending in extension of the longitudinal sides 3, 4 arranged tabs 9 of the hollow section 2 to the narrow sides 5, 6, with additional crimping (eg notches) or other mechanical connections (eg rivet joints) to prevent mutual displacement are provided between the steel strip 7 and 8 and the hollow section 2. It would be quite possible to fix the steel strips on the inside of the hollow profile, but the variant shown in Fig. 1 is particularly easy to manufacture.
In Fig. 2 ist ein Tragelement 10 mit einem ebenfalls rechteckförmigen, Längsseiten 13, 14 und Schmalseiten 15, 16 aufweisenden Hohlprofil 12 aus Aluminium dargestellt. Es ist wiederum eine Stütze aus einem im Vergleich zu Aluminium grossere Festigkeit und Steifigkeit aufweisenden Material zumindest für die zugbelastete Schmalseite 16 vorgesehen. Beim in Fig. 2 dargestellten Ausführungsbeispiel sind beide Schmalseiten 15, 16 verstärkt, indem in allen Eckbereichen der Schmal-/Längsseiten jeweils ein Stahldraht 17 fixiert ist. Die Stahldrähte 17 werden durch Umbiegen von auf der Innenseite des Hohlprofils 12 vorgesehenen Lappen 19 festgehalten, wobei zusätzliche Quetschverbindungen oder andere mechanische Verbindungen zum Verhindern von gegenseitigen Verschiebungen zwischen dem jeweiligen Stahldraht 17 und dem Hohlprofil 12 vorgesehen sind. Es können z.B. aufgerauhte Drähte 17 verwendet werden.In Fig. 2, a support member 10 is shown with a likewise rectangular, longitudinal sides 13, 14 and narrow sides 15, 16 having hollow profile 12 made of aluminum. It is in turn a support of a greater strength and rigidity compared to aluminum having material provided at least for the tensile narrow side 16. In the embodiment shown in Fig. 2, both narrow sides 15, 16 are reinforced by a steel wire 17 is fixed in all corner regions of the narrow / long sides. The steel wires 17 are retained by bending tabs 19 provided on the inside of the hollow section 12, with additional crimp connections or other mechanical connections for preventing mutual displacements between the respective steel wire 17 and the hollow section 12. It can e.g. Roughened wires 17 are used.
Eine weitere Ausführungsform eines Tragelementes 20 ist in Fig. 3 dargestellt. Auch das Tragelement 20 ist als ein im wesentlichen rechteckförmi- ger Hohlteil ausgebildet, dessen Längsseiten 23, 24 durch zwei U-förmige Profile 21, 22 aus Aluminium gebildet sind. In den einander zugewandten Schenkeln 23a, 24a bzw. 23b, 24b der Aluminium- Profile 21, 22 ist jeweils ein Stahlband 25, 26 fixiert, der einen Teil der Schmalseiten bildet. Die Stahlbänder 25, 26 werden vorzugsweise in entsprechende Ausnehmungen 27 der gegenüberliegenden Schenkel 23a, 24a bzw. 23b, 24b ein- gepresst.Another embodiment of a support element 20 is shown in Fig. 3. Also, the support member 20 is formed as a substantially rechteckförmi- ger hollow part, the longitudinal sides 23, 24 are formed by two U-shaped profiles 21, 22 made of aluminum. In the facing each other Legs 23a, 24a and 23b, 24b of the aluminum profiles 21, 22 are each a steel strip 25, 26 fixed, which forms a part of the narrow sides. The steel strips 25, 26 are preferably pressed into corresponding recesses 27 of the opposite legs 23a, 24a and 23b, 24b.
Dadurch, dass zumindest die zugbelastete Schmalseite der erfindungsge- mässen Tragelemente 1, 10, 20 einen sich über ihre Gesamtlänge erstrek- kenden Teil oder eine Stütze aus einem im Vergleich zu Aluminium grossere Festigkeit und Steifigkeit aufweisenden Material, vorzugsweise Stahl, umfasst, kann die Durchbiegesteifigkeit bzw. Festigkeit des Tragelementes erheblich verbessert werden, was eine Reduktion seines Gesamtprofils möglich macht und Material- und somit auch Kosteneinsparungen mit sich bringt. Die Reduktion des Volumens bringt neben der Materialeinsparung auch logistische Vorteile. Schliesslich kann auch das Gesamtgewicht beispielsweise einer mit den erfindungsgemäss ausgestalteten Tragelementen bzw. Holmen versehener Leiter reduziert und Kosteneinsparungen bis zu 20% erreicht werden.Due to the fact that at least the tension-loaded narrow side of the support elements 1, 10, 20 according to the invention comprises a material or preferably a steel which has greater strength and rigidity than aluminum over its entire length, the flexural rigidity can or strength of the support element can be significantly improved, which makes a reduction of its overall profile possible and material and thus also brings cost savings. The reduction in volume not only saves material but also logistical advantages. Finally, the total weight of, for example, a conductor provided with the support elements or bars configured according to the invention can be reduced and cost savings of up to 20% can be achieved.
Wie in Fig. 4a und 4b gezeigt, können die Tragelemente bzw. Holme für eine Leiter auch aus zwei im Querschnitt U-förmigen Aluminium-Profilen 31, 32 zusammengesteckt werden, wozu die Schenkel 31a, 31b, 32a, 32b dieser Profile mit entsprechende Schnappelementen ausgerüstet sind. Die Schmalseiten des aus den Profilen 31, 32 zusammengesteckten Hohlteils (oder zumindest die zugbeanspruchte Schmalseite bzw. Profil) sind wiederum mit der erfindungsgemässen Stütze aus einem im Vergleich zu Aluminium grossere Festigkeit und Steifigkeit aufweisenden Material, vorzugsweise Stahl ausgestattet. Aus Fig. 4a sind lediglich die der Innenseiten der Profile 31, 32 zugeordneten Lappen 33 ersichtlich, die für die Befesti- gung von Stahldrähten in den Eckbereichen der Profile 31, 32 vorgesehen sind.As shown in Fig. 4a and 4b, the support elements or bars for a ladder can also be assembled from two U-shaped aluminum profiles 31, 32, including the legs 31a, 31b, 32a, 32b of these profiles with corresponding snap elements are equipped. The narrow sides of the assembled from the profiles 31, 32 hollow part (or at least the zugbeanspruchte narrow side or profile) are in turn equipped with the inventive support of a greater compared to aluminum strength and stiffness material, preferably steel. FIG. 4 a shows only the tabs 33 associated with the inner sides of the profiles 31, 32, which are used for fastening supply of steel wires in the corner regions of the profiles 31, 32 are provided.
Die zusammensteckbaren Profilschenkel, die die Längsseiten des Holmes bilden, können gemäss Fig. 4b mit geeigneten Ausnehmungen 37, 38 für die Aufnahme einer Leitersprosse versehen sein, die einen den Ausnehmungen 37, 38 entsprechenden Querschnitt aufweist, und die beim Zusammenstecken der beiden U-förmigen Profile 31, 32 zwischen diesen einklemmbar ist, was schematisch in Fig. 5 angedeutet ist, wo die Leitersprosse mit 40 bezeichnet ist. Der Leitersprosse 40 bzw. den Profilen 3 1, 32 können auch einander entsprechende Rastelemente zugeordnet sein, mit denen die Sprosse 40 beim Zusammenstecken der Profile 31, 32 in ihrer Längsrichtung fixiert wird.The mating profile legs which form the longitudinal sides of the spar can, according to FIG. 4 b, be provided with suitable recesses 37, 38 for receiving a ladder rung, which has a cross-section corresponding to the recesses 37, 38, and which forms the two U-shaped mating pieces Profile 31, 32 can be clamped between them, which is schematically indicated in Fig. 5, where the ladder rung is designated 40. The ladder rung 40 or the profiles 3 1, 32 may also be associated with each other corresponding latching elements, with which the rung 40 when mating the profiles 31, 32 is fixed in its longitudinal direction.
Wie in Fig. 6a, 6b angedeutet, kann ein Holm auch aus zwei im Querschnitt L-förmigen Aluminium-Profilen 41, 42 zusammensteckbar sein, wobei das Zusammenstecken in Längsrichtung S der Sprosse 40 (Fig. 6a) oder in Querrichtung P (Fig. 6b), wie bei den U-förmigen Profilen 31, 32 nach Fig. 4b und 5, erfolgen kann. Analog zu der vorstehend beschriebenen Ausführungsform ist auch bei dieser Variante eine Stütze aus einem im Vergleich zu Aluminium grossere Festigkeit und Steifigkeit aufweisenden Material, vorzugsweise Stahl, für die Holm-Schmalseiten 45, 46 vorgesehen, und die Längsseiten 43, 44 können Ausnehmungen für die Aufnahme der Leitersprosse 40 aufweisen, wobei die Verlegung der Sprosse 40 aus einer zentralen Stellung zu der druckbelasteten Schmalseite 45 hin kräftemässig vorteilhaft ist.As indicated in Fig. 6a, 6b, a spar can also be made of two in cross-section L-shaped aluminum profiles 41, 42 can be plugged together, wherein the mating in the longitudinal direction S of the rung 40 (Fig. 6a) or in the transverse direction P (Fig. 6b), as in the U-shaped profiles 31, 32 of FIG. 4b and 5, can take place. Analogous to the embodiment described above, also in this variant, a support made of a greater strength and stiffness compared to aluminum material, preferably steel, provided for the spar narrow sides 45, 46, and the longitudinal sides 43, 44 can recesses for receiving have the ladder rung 40, wherein the laying of the rung 40 from a central position to the pressure-loaded narrow side 45 toward the power is advantageous.
Selbstverständlich wären noch weitere Ausführungsformen der erfin- dungsgemässen Tragelemente durchaus denkbar. Auch könnten anstelle von Stahl andere Materialien bzw. Metalle für die Ausgestaltung oder Verstärkung der Schmalseiten Verwendung finden. Die erfindungsgemässen Tragelemente sind nicht nur für Leiterholme geeignet, sondern überall dort, wo ähnliche Aluminiumprofile eingesetzt und Biege- bzw. Zugbean- g-au-sg-es-g-tz-t werden, z.B. bei Sonnenstoren etc. Of course, further embodiments of the support elements according to the invention would also be conceivable. Also could be instead steel other materials or metals for the design or reinforcement of the narrow sides use. The support elements according to the invention are not only suitable for ladder stiles, but everywhere where similar aluminum profiles are used and bending or tensile strength is obtained, eg in the case of sun blinds, etc.

Claims

PATENTANSPRÜCHE
1. Längliches Tragelement, insbesondere Holm für eine Leiter, welches als ein im wesentlichen rechteckförmiger Hohlteil aus mindestens einem Aluminium-Profil (2; 12; 22; 31, 32; 41, 42) ausgebildet ist und zwei Längs- sowie zwei Schmalseiten (2, 4, 5, 6; 12, 14, 15, 16; 23, 24; 43, 44, 45, 46) aufweist und einer Biegebeanspruchung in einer zu den Längsseiten (2, 4; 12, 14; 23, 24; 43, 44) parallelen Ebene ausgesetzt ist, dadurch gekennzeichnet, dass zumindest die zugbelastete Schmalseite (6; 16; 46) einen sich über ihre Gesamtlänge erstreckenden Teil (25, 26) oder eine Stütze (7, 8; 17) aus einem im Vergleich zu Aluminium grossere Festigkeit und Steifigkeit aufweisenden Material umfasst. 1. elongated support element, in particular spar for a ladder, which is formed as a substantially rectangular hollow part of at least one aluminum profile (2; 12; 22; 31, 32; 41, 42) and two longitudinal and two narrow sides (2 , 4, 5, 6, 12, 14, 15, 16, 23, 24, 43, 44, 45, 46) and a bending stress in one of the longitudinal sides (2, 4, 12, 14, 23, 24, 43 , 44) is exposed to a parallel plane, characterized in that at least the tensioned narrow side (6; 16; 46) has an overall length extending portion (25, 26) or a support (7, 8; 17) of one compared to Aluminum includes greater strength and stiffness containing material.
2. Tragelement nach Anspruch I5 dadurch gekennzeichnet, • dass der Schmalseiten-Teil (25, 26) oder Stütze (7, 8; 17) aus Stahl ist.2. Supporting element according to claim I 5 characterized in that • the narrow side part (25, 26) or support (7, 8, 17) is made of steel.
3. Tragelement nach Anspruch 2, dadurch gekennzeichnet, dass ein Alumiήium-Hohlprofil (2) sowohl die Längsseiten (3, 4) als auch die Schmalseiten (5, 6) des Tragelementes (1) bildet, wobei zumindest an der zugbelasteten Schmalseite (6) ein Stahlband (7, 8) fixiert ist.3. Supporting element according to claim 2, characterized in that an aluminum hollow profile (2) forms both the longitudinal sides (3, 4) and the narrow sides (5, 6) of the support element (1), wherein at least on the tensioned narrow side (6 ) a steel strip (7, 8) is fixed.
4. Tragelement nach Anspruch 3, dadurch gekennzeichnet, dass das Stahlband (7, 8) durch Umbiegen von in Verlängerung der Längsseiten (3, 4) angeordneten Lappen (9) des Hohlprofils (2) zu der Schmalseite (5, 6) hin an der Aussenseite derselben festgehalten ist, wobei zusätzliche Quetschverbindungen oder andere mechanische Verbindungen zum Verhindern von gegenseitigen Verschiebungen zwischen dem Stahlband (7, 8) und dem Hohlprofil (2) vorgesehen sind.4. Supporting element according to claim 3, characterized in that the steel strip (7, 8) by bending in extension of the longitudinal sides (3, 4) arranged tabs (9) of the hollow profile (2) to the narrow side (5, 6) towards the outside of the same is held, with additional crimp connections or other mechanical connections for preventing mutual displacements between the steel strip (7, 8) and the hollow profile (2) are provided.
5. Tragelement nach Anspruch 2, dadurch gekennzeichnet, dass ein Aluminium-Hohlprofil (12) sowohl die Längsseiten (13, 14) als auch die Schmalseiten (15, 16) des Tragelementes (10) bildet, wobei im Eckbereich der S chmal-/Längsseiten jeweils ein Stahldraht (17) fixiert ist.5. Supporting element according to claim 2, characterized in that an aluminum hollow profile (12) forms both the longitudinal sides (13, 14) and the narrow sides (15, 16) of the support element (10), wherein in the corner of the S chmal- / Long sides each a steel wire (17) is fixed.
6. Tragelement nach Anspruch 5, dadurch gekennzeichnet, dass die Stahldrähte (17) durch Umbiegen von auf der Innenseite des Hohlprofils (12) vorgesehenen Lappen (19) festgehalten sind, wobei zusätzliche Quetschverbindungen oder andere mechanische Verbindungen zum Verhindern von gegenseitigen Verschiebungen zwischen dem jeweiligen Stahl draht (17) und dem Hohlprofil (12) vorgesehen sind. 6. Supporting element according to claim 5, characterized in that the steel wires (17) by bending on the inside of the hollow profile (12) provided tabs (19) are held, with additional crimp connections or other mechanical connections for preventing mutual displacements between the respective Steel wire (17) and the hollow profile (12) are provided.
7. Tragelement nach Anspruch 2, dadurch gekennzeichnet, dass die Schmalseiten jeweils einen als Stahlband (25, 26) ausgebildeten Teil aufweisen, der in zwei gegenüberliegenden Schenkeln (23a, 24a; 23b, 24b) von zwei die Längsseiten (23, 24) bildenden U-förmigen Profilen (21, 22) aus Aluminium fixiert ist.7. Supporting element according to claim 2, characterized in that the narrow sides each have a steel band (25, 26) formed part in two opposite legs (23a, 24a, 23b, 24b) of two the longitudinal sides (23, 24) forming U-shaped profiles (21, 22) made of aluminum is fixed.
8. Tragelement nach Anspruch 7, dadurch gekennzeichnet, dass der als Stahlband (25, 26) ausgebildete Teil der jeweiligen Schmalseite in Ausnehmungen (27) der gegenüberliegenden Schenkel (23a, 24a; 23b, 24b) eingepresst ist.8. Supporting element according to claim 7, characterized in that the steel strip (25, 26) formed part of the respective narrow side in recesses (27) of the opposite legs (23a, 24a, 23b, 24b) is pressed.
9. Längliches Tragelement, insbesondere Holm für eine Leiter, welches als ein im wesentlichen rechteckförmiger Hohlteil aus mindestens einem Aluminium-Profil (31, 32; 41, 42) ausgebildet ist und zwei Längs- sowie zwei Schmalseiten (43, 44, 45, 46) aufweist und einer Biegebeanspruchung in einer zu den Längsseiten (43, 44) parallelen Ebene ausgesetzt ist, dadurch gekennzeichnet, dass zwei im Querschnitt L- oder U- förmige Profile (31, 32; 41, 42) aus Aluminium zu dem im wesentlichen rechteckförmigen Hohlteil zusammenfügbar sind.9. elongated support element, in particular spar for a ladder, which is formed as a substantially rectangular hollow part of at least one aluminum profile (31, 32, 41, 42) and two longitudinal and two narrow sides (43, 44, 45, 46 ) and is subjected to a bending stress in a plane parallel to the longitudinal sides (43, 44), characterized in that two L-shaped or U-shaped profiles (31, 32, 41, 42) of aluminum are made to be substantially rectangular Hollow part are joined together.
10. Tragelement nach Anspruch 9, dadurch gekennzeichnet, dass die zwei L- oder U-förmigen Profile (31, 32; 41, 42) zu dem im wesentlichen rechteckförmigen Hohlteil zusammensteckbar sind, dessen Schmalseiten (45, 46) mit der Stütze aus einem im Vergleich zu Aluminium grossere Festigkeit und Steifigkeit aufweisenden Material versehen sind. 10. Supporting element according to claim 9, characterized in that the two L- or U-shaped profiles (31, 32, 41, 42) can be joined together to form the substantially rectangular hollow part whose narrow sides (45, 46) with the support of a compared to aluminum greater strength and rigidity material are provided.
11. Leiter mit mindestens zwei Holmen und dazwischen angeordneten Sprossen, wobei die Holme als im wesentlichen rechteckförmige Hohlteile aus mindestens einem Aluminium-Profil ausgebildet sind und je zwei Längs- und je zwei Schmalseiten aufweisen, und die Sprossen rechtwinklig zu den Längsseiten gerichtet sind, dadurch gekennzeichnet, dass die Holme als Tragelemente (1 ; 10; 29) nach einem der Ansprüche 1 bis 9 ausgebildet sind.11. Ladder with at least two spars and intermediate rungs, wherein the spars are formed as substantially rectangular hollow portions of at least one aluminum profile and each have two longitudinal and two narrow sides, and the rungs are directed at right angles to the longitudinal sides, characterized in that the spars are designed as supporting elements (1; 10; 29) according to one of claims 1 to 9.
12. Leiter nach Anspruch 11, dadurch gekennzeichnet, dass jeder Holm aus zwei im Querschnitt L- oder U-förmigen und mit der Stütze aus einem im Vergleich zu Aluminium grossere Festigkeit und Steifigkeit aufweisenden Material versehenen Aluminium-Profilen (31, 32; 41, 42) zusammensteckbar ist, wobei die Sprossen (40) beim Zusammenstecken der beiden Profile (31, 32; 41, 42) in dem jeweiligen Holm einklemmbar sind. 12. A ladder according to claim 11, characterized in that each bar comprises two aluminum profiles (31, 32, 41, 41) which are cross-sectionally L-shaped or U-shaped and have a support made of material of greater strength and rigidity than aluminum. 42) can be plugged together, wherein the rungs (40) when mating the two profiles (31, 32, 41, 42) can be clamped in the respective spar.
PCT/EP2005/011396 2004-10-25 2005-10-24 Long carrier element, especially a side rail for a ladder WO2006097137A1 (en)

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EP3498966A1 (en) * 2017-12-18 2019-06-19 Sandvik Mining and Construction Oy Feed beam and method of stiffening the same
EP3498965A1 (en) * 2017-12-18 2019-06-19 Sandvik Mining and Construction Oy Feed beam for rock drilling rig and method of manufacturing the same

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FR819114A (en) * 1936-03-13 1937-10-11 Bru Der Wu Ster Process for the manufacture of metal uprights for balustrades, fences or similar constructions and for fixing the rungs
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EP3498966A1 (en) * 2017-12-18 2019-06-19 Sandvik Mining and Construction Oy Feed beam and method of stiffening the same
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