EP0936343B1 - Ladder rung - Google Patents

Ladder rung Download PDF

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Publication number
EP0936343B1
EP0936343B1 EP99101976A EP99101976A EP0936343B1 EP 0936343 B1 EP0936343 B1 EP 0936343B1 EP 99101976 A EP99101976 A EP 99101976A EP 99101976 A EP99101976 A EP 99101976A EP 0936343 B1 EP0936343 B1 EP 0936343B1
Authority
EP
European Patent Office
Prior art keywords
longitudinal
ladder rung
nubs
ribs
longitudinal outer
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
EP99101976A
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German (de)
French (fr)
Other versions
EP0936343A1 (en
Inventor
Jochen Dr. Ginsberg
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.)
Hailo Werk Rudolf Loh GmbH and Co KG
Original Assignee
Hailo Werk Rudolf Loh GmbH and Co KG
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 Hailo Werk Rudolf Loh GmbH and Co KG filed Critical Hailo Werk Rudolf Loh GmbH and Co KG
Publication of EP0936343A1 publication Critical patent/EP0936343A1/en
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Publication of EP0936343B1 publication Critical patent/EP0936343B1/en
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Classifications

    • EFIXED CONSTRUCTIONS
    • E06DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06CLADDERS
    • E06C7/00Component parts, supporting parts, or accessories
    • E06C7/08Special construction of longitudinal members, or rungs or other treads
    • E06C7/081Rungs or other treads comprising anti-slip features
    • EFIXED CONSTRUCTIONS
    • E06DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06CLADDERS
    • E06C7/00Component parts, supporting parts, or accessories
    • E06C7/08Special construction of longitudinal members, or rungs or other treads

Definitions

  • the present invention relates to a ladder rung approximately rectangular cross-section and four forming a body Longitudinal outer surfaces, each perpendicular to the neighboring one Stand longitudinal outer surface, the one forming the tread surface Longitudinal outer surface of the ladder rung through from the plane of the Outstanding areas to prevent slipping along the longitudinal outer surface is profiled, the ladder rung from an extruded or by forming profiled square hollow profile, which with in Rungs longitudinal direction is provided ribs.
  • the well-known ladder rung is the one that forms the step surface Longitudinal outer surface with a corrugation to a Form anti-skid.
  • the well-known ladder rung has outside an approximately rectangular outline, but has an inside Cross section circular cavity.
  • the object of the present invention is a Ladder rungs of the type mentioned above are available make that in a particularly simple inexpensive way can be produced and at the same time an effective Has anti-slip.
  • An object of the invention provides the solution to this problem Ladder rung of the type mentioned at the beginning with the characteristic features of the main claim.
  • the ladder rung consists of one extruded or by forming (profiling), to Example in the rolling process, produced square hollow profile.
  • the Ladder rung initially in with the manufacturing process Longitudinal continuous longitudinal ribs is profiled or but is also extruded. Is the profiling through Forming is provided, for example, in the rolling process assumed a flat material, which after completion of the Profiling process is welded. In both cases, that is both in manufacturing by profiling as well optionally by extrusion, you can then by embossing in the transverse direction Create gaps between the knobs. You have one particularly simple manufacturing process, which leads to a Ladder rung with high stability and comparatively thin Material thickness leads through the raised knobs effective on one or more of the longitudinal outer surfaces Has anti-slip, which slips off the foot, which the Prevents people using the ladder.
  • the manufacture can automated for example in a rolling mill and is particularly economical in this respect.
  • FIGS. 1 and 2 The illustration is schematically simplified and shown in principle just a section of a ladder rung, the Attachment to the ladder is not shown and the of course different lengths or diameters can have.
  • the ladder rung according to the invention has four Longitudinal outer surfaces 1, 2, 3, 4, which in principle are rectangular Form basic shape in outline, although in the Corner areas the rectangle profile is rounded.
  • the top longitudinal outer surface 2 is, for example Tread. In the exemplary embodiment, however, all are four Longitudinal outer surfaces 1, 2, 3, 4 each with a cross section preferably rectangular knobs 5 provided. These pimples are arranged in longitudinal rows with 6, 7, 8, 9, 10 are designated.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ladders (AREA)
  • Steroid Compounds (AREA)

Abstract

Each of the four longitudinal outer surfaces (1,2,3,4) is at right angles to the adjacent longitudinal surface. The longitudinal surface forming the tread surface (2) has outward-protruding parts profiled to prevent slipping, in the form of rows of knobs (5) between which are cavities. The rows (6-10) are arranged in the longitudinal direction of the ladder-rungs.

Description

Die vorliegende Erfindung betrifft eine Leitersprosse mit etwa rechteckigem Querschnitt und vier einen Korpus bildenden Längsaußenflächen, die jeweils rechtwinklig zur benachbarten Längsaußenfläche stehen, wobei die die Trittfläche bildende Längsaußenfläche der Leitersprosse durch aus der Ebene der Längsaußenfläche herausragende Bereiche gegen Abrutschen profiliert ist, wobei die Leitersprosse aus einem stranggepreßten oder durch Umformen profilierten Vierkanthohlprofil besteht, welches mit in Sprossenlängsrichtung laufenden Rippen versehen ist.The present invention relates to a ladder rung approximately rectangular cross-section and four forming a body Longitudinal outer surfaces, each perpendicular to the neighboring one Stand longitudinal outer surface, the one forming the tread surface Longitudinal outer surface of the ladder rung through from the plane of the Outstanding areas to prevent slipping along the longitudinal outer surface is profiled, the ladder rung from an extruded or by forming profiled square hollow profile, which with in Rungs longitudinal direction is provided ribs.

Aus der DE 7507301.7 U1 ist beispielsweise eine Leitersprosse der eingangs genannten Art bekannt geworden. Bei dieser bekannten Leitersprosse ist die die Trittfläche bildende Längsaußenfläche mit einer Riffelung versehen, um einen Gleitschutz zu bilden. Die bekannte Leitersprosse hat außen einen etwa rechteckigen Umriß, weist jedoch innen einen im Querschnitt kreisförmigen Hohlraum auf. Durch diese Ausbildung soll eine relativ hohe Biegesteifigkeit für die Sprosse erhalten werden. Jedoch ist der Materialverbrauch bei der Herstellung der Sprosse aufgrund der relativ großen Wandstärke vergleichsweise hoch. Auch läßt sich eine solche Leitersprosse nicht ohne weiteres durch Umformen (Profilieren) im Walzverfahren herstellen.DE 7507301.7 U1, for example, describes a ladder rung of the type mentioned. At this The well-known ladder rung is the one that forms the step surface Longitudinal outer surface with a corrugation to a Form anti-skid. The well-known ladder rung has outside an approximately rectangular outline, but has an inside Cross section circular cavity. Through this Training is said to have a relatively high bending stiffness for the Rung can be obtained. However, the material consumption is the production of the rung due to the relatively large Wall thickness comparatively high. Such can also be done Ladder rungs are not easily formed Manufacture (profiling) in the rolling process.

Die Aufgabe der vorliegenden Erfindung besteht darin, eine Leitersprosse der eingangs genannten Gattung zur Verfügung zu stellen, die sich auf besonders einfache kostengünstige Weise herstellen läßt und dabei gleichzeitig einen effektiven Gleitschutz aufweist.The object of the present invention is a Ladder rungs of the type mentioned above are available make that in a particularly simple inexpensive way can be produced and at the same time an effective Has anti-slip.

Die Lösung dieser Aufgabe liefert eine erfindungsgemäße Leitersprosse der eingangs genannten Gattung mit den kennzeichnenden Merkmalen des Hauptanspruchs.An object of the invention provides the solution to this problem Ladder rung of the type mentioned at the beginning with the characteristic features of the main claim.

Erfindungsgemäß ist vorgesehen, daß die herausragenden Bereiche der Profilierung, die die Trittfläche gegen Abrutschen sichern, durch in Reihen angeordnete oben flache Noppen gebildet sind, wobei jeweils zwischen den einzelnen Noppen tieferliegende Zwischenräume angeordnet sind. Dabei sind die Noppen in in Längsrichtung der Leitersprosse verlaufenden Reihen angeordnet.According to the invention it is provided that the outstanding Areas of profiling that oppose the tread Secure slipping through flat top arranged in rows Nubs are formed, each between the individual Knobs deeper gaps are arranged. there are the knobs in the longitudinal direction of the Ladder rungs arranged in rows.

Die Leitersprosse besteht aus einem stranggepressten oder einem durch Umformen (Profilieren), zum Beispiel im Walzverfahren, hergestellten Vierkant-Hohlprofil.The ladder rung consists of one extruded or by forming (profiling), to Example in the rolling process, produced square hollow profile.

Erfindungsgemäß ist weiterhin vorgesehen, daß die Leitersprosse zunächst beim Herstellungsvorgang mit in Längsrichtung durchgehenden Längsrippen profiliert wird oder aber auch stranggepresst wird. Ist die Profilierung durch Umformen zum Beispiel im Walzverfahren vorgesehen, wird ausgegangen von einem Flachmaterial, das nach Abschluß des Profilierverfahrens verschweißt wird. In beiden Fällen, also sowohl bei Herstellung durch Profilieren als auch gegebenenfalls durch Strangpressen, kann man anschließend durch Prägen in Querrichtung die vertieften Zwischenräume zwischen den Noppen herstellen. Man hat so ein besonders einfaches Herstellverfahren, welches zu einer Leitersprosse mit hoher Stabilität bei vergleichsweise dünner Materialstärke führt, die außerdem durch die erhabenen Noppen an einer oder mehrerer der Längsaußenflächen einen effektiven Gleitschutz aufweist, der ein Abrutschen des Fußes, der die Leiter benutzenden Personen verhindert. Die Herstellung kann automatisiert zum Beispiel in einer Walzstraße erfolgen und ist insoweit besonders ökonomisch.According to the invention it is further provided that the Ladder rung initially in with the manufacturing process Longitudinal continuous longitudinal ribs is profiled or but is also extruded. Is the profiling through Forming is provided, for example, in the rolling process assumed a flat material, which after completion of the Profiling process is welded. In both cases, that is both in manufacturing by profiling as well optionally by extrusion, you can then by embossing in the transverse direction Create gaps between the knobs. You have one particularly simple manufacturing process, which leads to a Ladder rung with high stability and comparatively thin Material thickness leads through the raised knobs effective on one or more of the longitudinal outer surfaces Has anti-slip, which slips off the foot, which the Prevents people using the ladder. The manufacture can automated for example in a rolling mill and is particularly economical in this respect.

Die im Unteranspruch genannten Merkmale betreffen bevorzugte Weiterbildungen der Erfindung. Weitere Vorteile der Erfindung ergeben sich aus der nachfolgenden Detailbeschreibung. The features mentioned in the subclaim relate preferred developments of the invention. Additional advantages the invention result from the following Detailed description.

Im folgenden wird die vorliegende Erfindung anhand eines Ausführungsbeispiels unter Bezugnahme auf die beiliegenden Zeichnungen näher beschrieben. Dabei zeigen

Fig. 1
eine perspektivische Ansicht einer erfindungsgemäßen Leitersprosse;
Fig. 2
eine etwas andere perspektivische Ansicht einer erfindungsgemäßen Leitersprosse;
Fig. 3
eine Draufsicht auf eine erfindungsgemäße Leitersprosse;
Fig. 4
einen Längsschnitt durch die Leitersprosse entlang der Linie IV-IV von Fig. 3;
Fig. 5
einen Querschnitt entlang der Linie V-V von Fig. 3.
The present invention is described in more detail below using an exemplary embodiment and with reference to the accompanying drawings. Show
Fig. 1
a perspective view of a ladder rung according to the invention;
Fig. 2
a slightly different perspective view of a ladder rung according to the invention;
Fig. 3
a plan view of a ladder rung according to the invention;
Fig. 4
a longitudinal section through the ladder rung along the line IV-IV of Fig. 3;
Fig. 5
3 shows a cross section along the line VV from FIG. 3.

Zunächst wird auf die Fig. 1 und 2 Bezug genommen. Die Darstellung ist schematisch vereinfacht und gezeigt wird im Prinzip nur ein Ausschnitt aus einer Leitersprosse, deren Befestigung an der Leiter nicht dargestellt ist und die natürlich unterschiedliche Längen beziehungsweise Durchmesser aufweisen kann. Die erfindungsgemäße Leitersprosse hat vier Längsaußenflächen 1, 2, 3, 4, die im Prinzip eine rechteckige Grundform im Umriß bilden, wobei allerdings in den Eckbereichen jeweils das Rechteckprofil abgerundet ist. Die oberste Längsaußenfläche 2 ist beispielsweise die Trittfläche. In dem Ausführungsbeispiel sind jedoch alle vier Längsaußenflächen 1, 2, 3, 4 jeweils mit im Querschnitt vorzugsweise rechteckigen Noppen 5 versehen. Diese Noppen sind in Längsreihen angeordnet, die mit 6, 7, 8, 9, 10 bezeichnet sind.First, reference is made to FIGS. 1 and 2. The illustration is schematically simplified and shown in principle just a section of a ladder rung, the Attachment to the ladder is not shown and the of course different lengths or diameters can have. The ladder rung according to the invention has four Longitudinal outer surfaces 1, 2, 3, 4, which in principle are rectangular Form basic shape in outline, although in the Corner areas the rectangle profile is rounded. The top longitudinal outer surface 2 is, for example Tread. In the exemplary embodiment, however, all are four Longitudinal outer surfaces 1, 2, 3, 4 each with a cross section preferably rectangular knobs 5 provided. These pimples are arranged in longitudinal rows with 6, 7, 8, 9, 10 are designated.

Zur Herstellung einer solchen erfindungsgemäßen Leitersprosse kann man zunächst ein Profil entweder durch Umformen aus Flachmaterial profilieren, zum Beispiel walzen, oder aber ein solches Profil strangpressen, wobei das Profil nach der Herstellung bereits Längsrippen 12 aufweist, die man in Fig. 2 an der Innenseite des Profils erkennen kann. Anschließend kann man in einem weiteren Fertigungsgang mittels eines hier nicht dargestellten Prägewerkzeugs, das zum Beispiel Querrippen aufweist, die an einer Seite eines Prägestempels angeordnet sind, die nach außen vorstehenden Längsrippen 12 in Querrichtung prägen, so daß sich vertiefte Zwischenräume 11 ergeben. Dadurch werden dann die Noppen 5 gebildet, die dann von den ursprünglichen Längsrippen 12 stehenbleiben und die zwischen sich die Zwischenräume 11 aufweisen (siehe Fig. 1). In den Fig. 3 bis 5 kann man die Ausbildung der erfindungsgemäßen Leitersprosse noch genauer erkennen. Der Längsschnitt durch das Profil der Leitersprosse gemäß Fig. 4 ist durch eine Längsreihe von Noppen 5 gelegt. Es wurde also im Prinzip durch eine ursprüngliche Längsrippe 12 geschnitten. Man erkennt in Fig. 4 die Noppen 5 und die zwischen diesen liegenden Zwischenräume 11. In Fig. 5 erkennt man, daß mehrere Reihen von Noppen 5 nebeneinander liegen und daß die einzelnen Noppen im Schnitt etwa trapezförmig ausgebildet sein können. Zwischen den verschiedenen parallelen beabstandeten Längsreihen 6, 7, 8, 9, 10 mit Noppen 5 liegen Zwischenreihen 13, so daß die Noppen 5 gegenüber diesen glatten Bereichen der Zwischenreihen 13 erhaben sind.To produce such a ladder rung according to the invention you can first make a profile either by reshaping it Profiling flat material, for example rolling, or one extrude such profile, the profile after the Production already has longitudinal ribs 12, which are shown in Fig. 2 can be seen on the inside of the profile. Subsequently you can in a further production step by means of an embossing tool, not shown here, the for example, has transverse ribs on one side of a Embossing stamps are arranged which protrude outwards Emboss longitudinal ribs 12 in the transverse direction so that they are deepened Spaces 11 result. Then the knobs 5 formed by the original longitudinal ribs 12th stop and the spaces 11 between them have (see Fig. 1). 3 to 5 you can see the Formation of the ladder rung according to the invention even more precisely detect. The longitudinal section through the profile of the ladder rung 4 is placed through a longitudinal row of knobs 5. So in principle it was due to an original longitudinal rib 12 cut. 4 shows the knobs 5 and between these intermediate spaces 11. Recognized in Fig. 5 one that several rows of knobs 5 lie side by side and that the individual knobs have an approximately trapezoidal shape can be trained. Between the different parallel spaced longitudinal rows 6, 7, 8, 9, 10 with Nubs 5 are intermediate rows 13, so that the nubs 5 compared to these smooth areas of the intermediate rows 13 are sublime.

Claims (3)

  1. Ladder rung having a roughly quadrilateral cross section and four longitudinal outer surfaces which form a body and are each at right angles to the adjacent longitudinal outer surface, that longitudinal outer surface of the ladder rung which forms the tread being profiled, in such a way as to prevent slipping, by regions projecting from the plane of the longitudinal outer surface, the ladder rung consisting of an extruded square hollow section, or a square hollow section profiled by shaping, which is provided with ribs running in the rung longitudinal direction, characterized in that the projecting regions are nubs (5) arranged in rows and flat at the top, deeper intermediate spaces (11) being arranged in each case between the individual nubs (5), in that the intermediate spaces (11) between the nubs (5) are formed by transverse embossment of the ribs, and in that the square hollow section is also quadrilateral in cross section on the inside.
  2. Ladder rung according to Claim 1, characterized in that the nubs (5) are provided on more than one of the longitudinal outer surfaces, preferably on all four of the longitudinal outer surfaces (1, 2, 3, 4) of the ladder rung.
  3. Method of producing a ladder rung according to either of Claims 1 or 2, characterized in that first of all a square hollow tube having longitudinal ribs corresponding to the longitudinal rows (6 to 10) is extruded or profiled by shaping, and, in a subsequent operation by means of an embossing tool having transverse ribs, the longitudinal ribs of the ladder rung are embossed in the transverse direction, so that recessed intermediate spaces (11) are obtained and nubs (5) are formed.
EP99101976A 1998-02-13 1999-02-01 Ladder rung Expired - Lifetime EP0936343B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19807620 1998-02-13
DE19807620A DE19807620A1 (en) 1998-02-13 1998-02-13 Ladder rung

Publications (2)

Publication Number Publication Date
EP0936343A1 EP0936343A1 (en) 1999-08-18
EP0936343B1 true EP0936343B1 (en) 2002-05-15

Family

ID=7858680

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99101976A Expired - Lifetime EP0936343B1 (en) 1998-02-13 1999-02-01 Ladder rung

Country Status (4)

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EP (1) EP0936343B1 (en)
AT (1) ATE217680T1 (en)
DE (2) DE19807620A1 (en)
PL (1) PL331197A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023200795A1 (en) * 2022-04-11 2023-10-19 Werner Co. Treads for climbing products and methods of manufacture

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2104303A (en) * 1934-05-16 1938-01-04 Paul N Howard Ladder construction
US2294333A (en) * 1940-06-26 1942-08-25 Gridiron Steel Company Ladder
GB1109714A (en) * 1966-05-13 1968-04-10 Lloyds Ladders Ltd Improvements in ladders
US3908260A (en) * 1973-10-12 1975-09-30 Charles M Loomis Method of making a truck ladder
DE7507301U (en) * 1974-03-11 1975-07-03 Rey H Light metal ladder
DE2429420A1 (en) * 1974-06-19 1976-01-08 Alfer Alu Fertigbau Ladder or frame rung connection - with rung with two recesses inserted from open side into cutout
GB2127327B (en) * 1982-08-20 1986-04-30 Alton Systems Limited An antiskid surface treatment for use on scaffolding components
GB2206614B (en) * 1987-07-10 1991-10-16 Nippon Tenshashi Kk Metallic slip-proof element
DE3842302A1 (en) * 1988-12-16 1990-06-21 Loh Kg Hailo Werk Step or platform for a stepladder
EP0607740A1 (en) * 1993-01-22 1994-07-27 Astral Sociedad Anonima De Construcciones Metalicas Rung for a swimming pool ladder
DK171750B1 (en) * 1994-12-07 1997-05-05 Pf Management Aps Platform-type staircase or ladder step
FR2742081B1 (en) * 1995-12-11 1999-02-26 Caterpillar Inc STEP PLATE CONFIGURATION
DE29614750U1 (en) * 1996-08-24 1996-11-21 Hasenbach Lorenz Gmbh Co Kg Ladder rung for single-leg ladders

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023200795A1 (en) * 2022-04-11 2023-10-19 Werner Co. Treads for climbing products and methods of manufacture

Also Published As

Publication number Publication date
PL331197A1 (en) 1999-08-16
DE59901431D1 (en) 2002-06-20
DE19807620A1 (en) 1999-09-02
EP0936343A1 (en) 1999-08-18
ATE217680T1 (en) 2002-06-15

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