EP1669538B1 - Leiter mit Rutschverhinderungsstruktur - Google Patents

Leiter mit Rutschverhinderungsstruktur Download PDF

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Publication number
EP1669538B1
EP1669538B1 EP05111745A EP05111745A EP1669538B1 EP 1669538 B1 EP1669538 B1 EP 1669538B1 EP 05111745 A EP05111745 A EP 05111745A EP 05111745 A EP05111745 A EP 05111745A EP 1669538 B1 EP1669538 B1 EP 1669538B1
Authority
EP
European Patent Office
Prior art keywords
ladder
auxiliary
bar
fastened
spring
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.)
Not-in-force
Application number
EP05111745A
Other languages
English (en)
French (fr)
Other versions
EP1669538A1 (de
Inventor
Antoon Teel
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.)
Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP1669538A1 publication Critical patent/EP1669538A1/de
Application granted granted Critical
Publication of EP1669538B1 publication Critical patent/EP1669538B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C7/00—Component parts, supporting parts, or accessories
    • E06C7/42—Ladder feet; Supports therefor
    • E06C7/423—Ladder stabilising struts

Definitions

  • the present invention relates to means for preventing shifting of a ladder according to the precharacterising clause of Claim 1. Such means are disclosed in US 5165501 .
  • the aim of the present invention is to provide means for preventing shifting of a ladder with which slipping is prevented in an effective manner under all circumstances.
  • the auxiliary bar is in use fitted such that it can be moved relative to the lower end of the ladder.
  • This auxiliary bar is braced against the ground concerned.
  • Two auxiliary arms extend from the auxiliary bar towards the ladder, which arm functions as a strut and provides stability to the structure.
  • the auxiliary arms can provide adjustment in the event of possible sinking and/or repositioning. It has been found that in this way slipping of the bottom of the stiles is effectively prevented.
  • a auxiliary arm of variable length on both sides, differences in height left and right of the centrally positioned ladder are compensated, as a result of which unsafe situations are prevented.
  • the width of the auxiliary bar is at least the same as the width of the ladder close to the lower end thereof.
  • the reaction bars can extend at an angle to the horizontal, but is preferably arranged essentially approximately horizontally in the use position.
  • the auxiliary arms are fastened to the ladder at a distance of between 80 and 160 cm from the bottom of the ladder. This fastening is preferably effected on the outside of the stile.
  • both the auxiliary arms and the auxiliary bars are of adjustable length and width, respectively, in order to provide optimum adjustment to the prevailing conditions.
  • variable length of the auxiliary arm that alters during use is achieved by making this auxiliary arm in two parts that can slide relative to one another and fitting a spring between them.
  • This spring is preferably made such that it drives the two parts apart, that is to say drives the auxiliary arm away from the lower end of the ladder.
  • the length of the auxiliary arm is adjusted by sliding the two parts relative to one another such that there is no tension or only slight tension. Thereafter locking of the parts relative to one another is established in such a way that these two parts can only telescope against the resistance of the spring.
  • this spring is automatically tensioned and continually presses the auxiliary bar against the ground in an optimum manner, as a result of which a particularly stable entity is obtained.
  • the spring has a spring constant of approximately 2 - 3 N/mm. Assuming a tension of 300 N in the spring when the ladder is placed, optimum adjustment to the prevailing conditions is provided. Slightly different values can optionally be chosen if the weight of the user differs substantially from the average weight of a user.
  • the invention also relates to a ladder with such means for preventing shifting of a ladder, wherein the free ends of both the auxiliary arms and the reaction bars are made for fastening to a ladder in a pivoting manner.
  • the fastening in a pivoting manner can in principle be any fastening known in the state of the art, but preferably comprises a ball joint at the fastening to the ladder, so that the arms can diverge sideways.
  • auxiliary arms engage on the second or third rung from the bottom. If the auxiliary arm engages on a higher rung the stability of the structure will be reduced.
  • the spring concerned can be a helical spring, gas spring or the like.
  • Fig. 1 the ladder according to the present invention is indicated by 1. This is placed against an exterior wall 2.
  • the ladder has a length of approximately 7 m, but it will be understood that this length can vary depending on the structure of the ladder (extendable or non-extendable).
  • Ladder 1 consists of two opposing stiles 4, between which rungs extend.
  • auxiliary bar 10 consisting of two adjustable parts 11 and 12 that can slide relative to one another. These parts are secured in a specific position relative to one another and locked with bolt 13.
  • a auxiliary arm 14 is connected to auxiliary bar 10 via pivot joints 19.
  • Auxiliary arm 14 also consists of two telescopic parts 15, 16.
  • spring 23 ( Fig. 3 ) that drives part 15 and part 16 apart. Spring 23 is braced, on the one hand, against pin 17 in part 15 and is braced, on the other hand, against the end of part 16.
  • Reaction bar 20 consists of parts 21 and 22, which can be secured in a position relative to one another with a pin 25. That is to say, after setting, the position of the parts 21 and 22 relative to one another no longer changes.
  • Part 21 is connected to the stile 4 via a ball joint.
  • Auxiliary arm 14 is connected to the stile 4 and 3, respectively, via pivot joints 18.
  • the distance between pivot point 18 and the lower end of the ladder is between 80 and 160 cm.
  • Opposing pivot joints, such as pivot joints 18 can be connected using a threaded rod 35, shown diagrammatically. Ball joints can also be used instead of simple pivot joints.
  • a reaction bar 20 is fastened at a low level via pivot joint 27 to either side of each stile 3 and 4, respectively.
  • the reaction bar 20 consists of two telescopic parts 21, 22 that can slide relative to one another. Part 22 is connected to the auxiliary arm 14 in a pivoting manner at 26.
  • the spring 23 has a spring constant between 2 and 3 N/mm.
  • the spring can be moved from a relaxed state to a tensioned state.
  • the relaxed state is shown in Fig. 3b , a bolt 17 being in contact with the free end of spring 23 without any substantial pressure.
  • the tensioned state is shown in Fig. 3a .
  • Both auxiliary arms can have the same type of spring, but it is also possible to fit different springs.
  • the width of the auxiliary bar 10 is set. Preferably this is as wide as possible.
  • the maximum width (B) can be 2 m or more.
  • the position of the parts relative to one another can optionally be fixed using pin 13.
  • the rearwards position of the auxiliary bar 10 can also be set by mutual adjustment of the parts 21 and 22 of the reaction bar 20. This position of the parts relative to one another is then fixed by inserting pin 25.
  • pin 17 does not have to be in part 15. That is to say, part 16 can move freely relative to part 15 and when the ladder is placed the auxiliary bar will drop to the ground under its own weight.
  • Pin 17 is then put into part 15 in this position, in which the free end of spring 23 is in contact with pin 17 or is situated a very small distance therefrom. The correct position can be assured by, for example, colouring the appropriate end of spring 23, by which means the position of that end can be seen through the openings in part 15.
  • auxiliary arm 14 By correctly sizing the different lengths of the auxiliary arm 14, reaction bar 20 and auxiliary bar 10, only a limited relative movement between part 16 and part 15 is needed. According to an advantageous embodiment the relative movement is a few centimetres, with a maximum of approximately 11 cm.
  • the structure that is intended to prevent slipping can be so made that the reaction bar 20 can easily be detached, either at pivot joint 26 or at pivot joint 27, as a result of which the auxiliary arm 14 can be folded down alongside the stiles 3, 4 and thus can be provided as a compact entity for transport.
  • the height of pivot point 18 can be made adjustable.
  • the structure according to the invention can simply be removed from the ladder to enable space-saving storage.
  • the pin part of the pivot joints can remain on the ladder, whilst the eye part can be removed in a simple manner. Obviously the same applies if ball joint connections are used.

Landscapes

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

Claims (12)

  1. Mittel um das Verschieben einer Leiter zu verhüten, umfassend einen Hilfsstab (10) an dem zwei Hilfsarme (14) mit einigem Abstand voneinander befestigt sind und umfassend weiter zwei zugehörige Reaktionsstäbe (20), die jeder an einem der Hilfsarme befestigt sind, wobei die freien Enden jedes Hilfsarms und jedes Reaktionsstabs (20) so konstruiert sind, dass sie drehbar an der Leiter befestigt werden können, wobei jeder Hilfsarm ein erstes Teil (15) zum Befestigen an einem Pfosten der Leiter umfasst und direkt mit dem Reaktionsstab (20) verbunden ist und ein zweites Teil (16) verschiebbar zum ersten Teil und mit dem Hilfsstab (10) verbunden, dadurch gekennzeichnet, dass das erste (15) und das zweite (16) Teil bezüglich einander bewegen können unter dem Einfluss einer Feder welche als Mittel zur Verhütung einer Verschiebung bestimmt ist.
  2. Leiter (1) umfassend zwei mit gleichen Abständen angeordnete Pfosten (4) und dazwischen angebrachte Sprossen (5) und Mittel nach Anspruch 1 dicht am Unterende der Leiter um die Verschiebung dieses Unterendes zu verhüten, wobei der Hilfsstab (10) als Mittel um die Verschiebung zu verhüten sich hauptsächlich parallel zu den Sprossen (5) erstreckt, wobei der Hilfsstab (10) an einem Ende der beiden Hilfsarme mit variabler Länge befestigt ist, wobei die Hilfsarme am anderen Ende der Leiter mit Abstand vom Unterende befestigt sind, und jeder Reaktionsstab (20) der Mittel um Verschiebung zu verhüten an der Leiter auf einer Position unter der Befestigungsposition der beiden Hilfsarme an der Leiter befestigt ist, und der Hilfsarm (14) mit variabler Länge an jedem Pfosten angebracht ist.
  3. Leiter nach Anspruch 2, wobei die Breite (B) des Hilfsstabs zumindest gleich der Breite (b) der Leiter dicht an ihrem Unterende ist.
  4. Leiter nach Anspruch 2 oder 3, wobei sich der Reaktionsstab hauptsächlich horizontal erstreckt.
  5. Leiter nach einem der Ansprüche 2-4, wobei der Hilfsarm (14) an der Leiter mit einem Abstand von 80-160 cm vom Bodenende der Leiter befestigt ist.
  6. Leiter nach einem der Ansprüche 2-5, wobei der Reaktionsstab eine einstellbare Länge hat.
  7. Leiter nach einem der Ansprüche 2-6, wobei der Hilfsarm mit einer Federstruktur (23) versehen ist, um eine variable Länge zu erreichen.
  8. Leiter nach Anspruch 7, wobei die Feder eine Federkonstante von 2-3 N/mm hat und die Feder von einem maximal gespannten Zustand zu einem maximal entspannten Zustand bewogen werden kann.
  9. Leiter nach Anspruch 8, wobei die Kraft der Feder in gespanntem Zustand zumindest 300N beträgt.
  10. Leiter nach einem der Ansprüche 8 oder 9, umfassend Verriegelungsmittel (17) um die maximale Variablenlänge des Hilfsarms zu begrenzen.
  11. Leiter nach einem der Ansprüche 2-10, wobei der Hilfsarm und der Reaktionsstab am Pfosten (4) an der Aussenseite weg von den Sprossen befestigt sind.
  12. Leiter nach Anspruch 11, wobei der Hilfsarm an der Leiter befestigt ist, an den zweiten oder dritten Sprossen vom Boden.
EP05111745A 2004-12-08 2005-12-06 Leiter mit Rutschverhinderungsstruktur Not-in-force EP1669538B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL1027692A NL1027692C2 (nl) 2004-12-08 2004-12-08 Ladder met wegglijden tegengaande constructie.

Publications (2)

Publication Number Publication Date
EP1669538A1 EP1669538A1 (de) 2006-06-14
EP1669538B1 true EP1669538B1 (de) 2008-06-25

Family

ID=34974665

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05111745A Not-in-force EP1669538B1 (de) 2004-12-08 2005-12-06 Leiter mit Rutschverhinderungsstruktur

Country Status (4)

Country Link
EP (1) EP1669538B1 (de)
AT (1) ATE399249T1 (de)
DE (1) DE602005007685D1 (de)
NL (1) NL1027692C2 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2995766A1 (de) 2014-09-11 2016-03-16 Willem Fledderus Griffleiter

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4130181A (en) * 1977-05-25 1978-12-19 Mccallum William J P Ladder support system
US5165501A (en) * 1991-07-25 1992-11-24 Donahey Howard E Ladder support attachment
DE9116598U1 (de) * 1991-12-02 1993-05-27 Boehle, Christian, 3548 Arolsen, De
US6053284A (en) * 1997-02-18 2000-04-25 Fountain; John W. Support frame for a ladder
DE29821356U1 (de) * 1998-11-30 1999-03-04 Laug Horst Stabilisierungsstützen für Bock- und Anlegeleitern

Also Published As

Publication number Publication date
DE602005007685D1 (de) 2008-08-07
ATE399249T1 (de) 2008-07-15
EP1669538A1 (de) 2006-06-14
NL1027692C2 (nl) 2006-06-09

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