EP0936343B1 - Ladder rung - Google Patents
Ladder rung Download PDFInfo
- 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
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C7/00—Component parts, supporting parts, or accessories
- E06C7/08—Special construction of longitudinal members, or rungs or other treads
- E06C7/081—Rungs or other treads comprising anti-slip features
-
- 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
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
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.
- 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
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
Claims (3)
- 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.
- 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.
- 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.
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)
Country | Link |
---|---|
EP (1) | EP0936343B1 (en) |
AT (1) | ATE217680T1 (en) |
DE (2) | DE19807620A1 (en) |
PL (1) | PL331197A1 (en) |
Cited By (1)
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)
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 |
-
1998
- 1998-02-13 DE DE19807620A patent/DE19807620A1/en not_active Ceased
-
1999
- 1999-02-01 EP EP99101976A patent/EP0936343B1/en not_active Expired - Lifetime
- 1999-02-01 DE DE59901431T patent/DE59901431D1/en not_active Expired - Lifetime
- 1999-02-01 AT AT99101976T patent/ATE217680T1/en not_active IP Right Cessation
- 1999-02-03 PL PL99331197A patent/PL331197A1/en not_active IP Right Cessation
Cited By (1)
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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