EP0479797B1 - Schiebeleiter - Google Patents

Schiebeleiter Download PDF

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Publication number
EP0479797B1
EP0479797B1 EP90907530A EP90907530A EP0479797B1 EP 0479797 B1 EP0479797 B1 EP 0479797B1 EP 90907530 A EP90907530 A EP 90907530A EP 90907530 A EP90907530 A EP 90907530A EP 0479797 B1 EP0479797 B1 EP 0479797B1
Authority
EP
European Patent Office
Prior art keywords
line
ladder
line guide
accordance
extension ladder
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
EP90907530A
Other languages
English (en)
French (fr)
Other versions
EP0479797A1 (de
Inventor
Hans Heggen
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.)
Wibe AB
Original Assignee
Wibe AB
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 Wibe AB filed Critical Wibe AB
Publication of EP0479797A1 publication Critical patent/EP0479797A1/de
Application granted granted Critical
Publication of EP0479797B1 publication Critical patent/EP0479797B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C1/00—Ladders in general
    • E06C1/02—Ladders in general with rigid longitudinal member or members
    • E06C1/04—Ladders for resting against objects, e.g. walls poles, trees
    • E06C1/08—Ladders for resting against objects, e.g. walls poles, trees multi-part
    • E06C1/12—Ladders for resting against objects, e.g. walls poles, trees multi-part extensible, e.g. telescopic

Definitions

  • the present invention relates to an extension ladder, comprising at least two separate single ladders which in their starting position lie upon and are slidable in relation to one another, and where one of the two adjacent ladders includes guide means for the other (US-A-3347340).
  • extension ladder is meant a ladder that consists of at least two single ladders and where there are employed auxiliary means, such as a line, to hoist the slidable single ladder.
  • the extension ladder must have locking hooks, or drop hooks, which lock the ladder both during hoisting and in its extended position.
  • An extension ladder when completely extended would be capable of reaching a length of up to 15 m.
  • extension ladder As the single ladders are being hoisted, the lines will be gathered up continuously by the ladder itself, so that the line does not collect on the ground.
  • the present extension ladder will also provide for more rapid extension, for example, against a wall, which could be a critical factor in a rescue situation.
  • an extension ladder of the type mentioned in the introduction characterized in that between each pair of adjacent single ladders there is arranged a line pull system, comprising line guides over which the line runs and changes direction, that a first ladder at one end thereof is provided with first line guides, one on each side or two on the same side, and at the opposite end with a pair of third line guides on one side, that a second ladder is provided with second line guides, one on each side or two on the same side, and in addition a fourth line guide on the one side and at the same end as the third line guides, the line at a first end thereof being secured to the second ladder in the same end region as the second line guide and running to the first line guide and further to the second line guide, to the secondary second line guide, to the secondary first line guide, to the third line guide, to the fourth line guide, to the secondary third line guide and further to a drop hook device attached to the second ladder, which drop hook device engages with sections of the first ladder for locking thereto.
  • the line can advantageously pass from the second line guide to the secondary line guide through a ladder rung.
  • the stepping path on the ladder will be totally free of crossing and longitudinal lines.
  • the line guides may be of any suitable type, such as funnel shaped holders, movable pulleys, castors or a combination thereof.
  • the single ladder that is to be hoisted first can advantageously be equipped with a top wheel to rest against a wall or similar base.
  • the extension ladder may also include support legs that afford four-point contact with the ground or floor so as to render it self-supporting and freestanding even when the entire ladder is fully extended.
  • the line guides, pulleys or castors may be disposed in respective fittings which in turn are attached to the respective side members.
  • the ladder may be manufactured from any suitable mater-ial, a practical and light-weight embodiment may presently be constructed of aluminum.
  • extension ladder consists of more than two single ladders
  • the respective lines can be marked, for example with the aid of coloring, so that the ladder sections may be hoisted in an appropriate sequence.
  • an extension ladder is shown consisting of four single ladders 10, 20, 30, 40.
  • the extension ladder may consist of fewer or more single ladders, the embodiment that is shown with four single ladders is particularly favorable with respect to compactness in collapsed position and the extent of its reach in hoisted position.
  • the bottom ladder 10 is widest and the top ladder 40 is narrowest.
  • Each single ladder comprises respective side members or stringers 5, 5'; 15, 15'; 25, 25'; 30, 30' and rungs 6, 16, 26, 36.
  • the top ladder 40 may be provided with a top wheel 9 adapted to rest against a wall or the like during the hoisting operation.
  • the ladder can advantageously be manufactured of aluminum, which combines in an excellent manner the requisite rigidity, strength and light weight.
  • the single ladders 10, 20, 30, 40 lie within one another, with the width for each single ladder decreasing by about two rail widths, which amounts roughly to a total of between 80 mm and 120mm.
  • the side members are equipped with guide means (not shown) which allow each of the two adjacent single ladders to guide and support the other.
  • Figure 3 shows the single ladders 10, 20, 30, 40 seen from the side and indicates how the single ladders lie within and guide one another.
  • a locking device or drop hook (not shown), which is described in more detail in Norwegian patent no. 151.755.
  • the drop hook has the capability of engaging with the rungs on the adjacent ladder so that the ladders may be locked in relation to one another for each step increment.
  • Figure 1 also shows a rope pull or line pull for hoisting of the respective ladders.
  • the line pull consists of a line 7 and respective line guides (1, 1'; 2, 2'; 3, 3';4) where the line guides in the embodiment shown are in the form of pulleys or castors. These may of course have other forms, such as an elbow tube with outwardly bent or flared holder openings in each end. It is important to keep clearly in view that there is an independent line pull between each pair of adjacent single ladders, so that in the four-part extension ladder shown there are three independent line pull systems, namely one between the single ladders 10 and 20, one between the single ladders 20 and 30 and one between the single ladders 30 and 40. Accordingly, only one line pull system between two single ladders will be described.
  • the hoisting of the extension ladder will be done by first pulling up the narrowest ladder or the top ladder 40. Then the single ladder 30 is drawn up, taking with it the single ladder 40. Finally, the single ladder 20 is hoisted, in turn taking with it each of the extended single ladders 30 and 40.
  • the line pull is schematically shown in further detail in Figure 4. From the figure it is apparent that the line pulls have the capability of changing the direction of the line 7 about an angle of either 90 o or 180 o
  • the line 7 is fastened at one end to the bottom end of a side member 15 and runs up to a first pulley 1 and turns 180 o down to a second pulley 2, then 90 o and through a ladder rung 16 and to a secondary second pulley 2', then 90 o up to a secondary first pulley 1' and 180 o back down to a third pulley 3 and 180 o up to a fourth pulley 4 and 180 o back down to a secondary third pulley 3' and 180 o back up to a drop hook (not shown), which is attached to the side member 15' of the ladder 20.
  • the drop hook follows upwards with the side member 15' and is capable of lock-ing to a ladder rung 6 on the adjacent ladder 10.
  • the part of the line 7 lying between the attachment to the side member 15 and the first pulley 1 becomes progressively shorter.
  • the portion of line 7 lying between the secondary third pulley 3' and the drop hook is extended accordingly.
  • the section of the line 7 lying between the first pulley 1 and the second pulley 2 and, respectively, the secondary pulley 2' and the secondary first pulley 1' becomes shorter, and this line is again taken up between the third pulley 3 and the fourth pulley 4 and the secondary third pulley 3'. In this way all of the line is accommodated and remains in the system without any of the line collecting on the ground.
  • extension ladder would also function satisfactorily if all the line guides were placed on one side of the ladder.
  • This embodiment form thus would also reside within the scope of the present invention.
  • the embodiment form with line guides placed on both sides is presently a preferred embodiment form, since it affords a good distribution of force to both sides of the ladder during the extension thereof.
  • the ladder may be equipped with support legs for four-point contact with the ground such that it forms a freestanding extension ladder unit.
  • the ladder consists of more than two single ladders, it may be advantageous to mark the lines, for example by coloring, so that the single ladders are hoisted in a given sequence, preferably the top ladder 40 first, followed by ladder 30, and finally ladder 20.
  • the respective line guides in the embodiment shown are disposed in fittings that are attached to the respective side members by, for example, riveting or welding.

Landscapes

  • Ladders (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Dental Preparations (AREA)
  • Paints Or Removers (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Combustion Methods Of Internal-Combustion Engines (AREA)
  • Valve Device For Special Equipments (AREA)
  • Programmable Controllers (AREA)

Claims (8)

  1. Schiebeleiter, bestehend aus mindestens zwei getrennten Einzelleitern (10, 20, 30, 40), welche in ihrer Ausgangsposition übereinander liegen und relativ zueinander verschieblich sind, wobei eine der beiden aneinanderliegenden Leitern Führungseinrichtungen für die andere Leiter enthält,
    dadurch gekennzeichnet, daß zwischen jedem Paar benachbarter Leitern (10 und 20, 20 und 30, 30 und 40) ein handbetätigtes Seilzugsystem vorgesehen ist, welches Seilführungen aufweist, über welche ein Seil (7) läuft und seine Richtung ändert, daß eine erste Leiter (10) an ihrem Oberende mit ersten Seilführungen (1, 1') versehen ist, wobei eine auf jeder Seite oder beide auf der gleichen Seite angeordnet sind, und wobei die Leiter an ihrem Unterende mit einem Paar dritter Seilführungen (3, 3') auf einer Seite versehen ist, daß eine benachbarte Leiter (20) an ihrem Unterende mit zweiten Seilführungen (2, 2') versehen ist, wobei eine auf jeder Seite oder beide auf der gleichen Seite angeordnet sind, und daß zusätzlich eine vierte Seilführung (4) auf der einen Seite und an demselben Ende wie die dritten Seilführungen (3, 3') vorgesehen ist, wobei das Seil (7) an einem ersten Ende (8) an der zweiten Leiter (20) in dem gleichen Endbereich wie die zweite Seilführung (2, 2') befestigt ist, und zu der ersten Seilführung (1) und weiter zu der zweiten Seilführung (2) verläuft, dann weiter zu der sekundären zweiten Seilführung (2'), zu der sekundären ersten Seilführung (1'), zu der dritten Seilführung (3), zu der vierten Seilführung (4), zu der sekundären dritten Seilführung (3') und weiterhin zu einer Fallhakeneinrichtung, welche an der zweiten Leiter (20) befestigt ist, wobei die Fallhakeneinrichtung in Eingriff mit Teilen der ersten Leiter (20) zur Verriegelung an dieser steht.
  2. Schiebeleiter nach Anspruch 1, dadurch gekennzeichnet, daß das Seil von der zweiten Seilführung (2) zu der sekundären Seilführung (2') durch eine Leitersprosse (16) verläuft.
  3. Schiebeleiter nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Seilführungen Halteeinrichtungen, Seilscheiben, Gleitrollen oder eine Kombination dieser Teile aufweisen.
  4. Schiebeleiter nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, daß die Leiter (40), welche als erste ausgeschoben wird, ein Rad (9) am Oberende aufweist.
  5. Schiebeleiter nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß sie Stützfüße derjenigen Art aufweist, welche eine Vierpunktberührung mit einer Oberfläche herstellt, um dadurch selbststehend zu werden.
  6. Schiebeleiter nach Anspruch 3, dadurch gekennzeichnet, daß die Seilscheiben oder Gleitrollen in entsprechenden Fittingen angeordnet sind, die an den entsprechenden Seitenteilen oder Holmen (5, 5'; 15, 15'; 25, 25'; 35, 35') befestigt sind.
  7. Schiebeleiter nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß sie aus Aluminium hergestellt ist.
  8. Schiebeleiter nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die Seile (7) markiert sind, um die Ausschiebefolge anzuzeigen.
EP90907530A 1989-05-16 1990-05-16 Schiebeleiter Expired - Lifetime EP0479797B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NO891964 1989-05-16
NO891964A NO167473C (no) 1989-05-16 1989-05-16 Heisestige
PCT/NO1990/000082 WO1990014491A1 (en) 1989-05-16 1990-05-16 Extension ladder

Publications (2)

Publication Number Publication Date
EP0479797A1 EP0479797A1 (de) 1992-04-15
EP0479797B1 true EP0479797B1 (de) 1994-04-13

Family

ID=19892022

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90907530A Expired - Lifetime EP0479797B1 (de) 1989-05-16 1990-05-16 Schiebeleiter

Country Status (9)

Country Link
EP (1) EP0479797B1 (de)
JP (1) JPH04505354A (de)
AT (1) ATE104402T1 (de)
AU (1) AU5650790A (de)
DE (1) DE69008177T2 (de)
DK (1) DK0479797T3 (de)
FI (1) FI915377A0 (de)
NO (1) NO167473C (de)
WO (1) WO1990014491A1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104234615A (zh) * 2013-06-10 2014-12-24 镇江跃进机械厂有限公司 一种防侧摔安全梯
JP6262601B2 (ja) * 2014-05-30 2018-01-17 紀美代 中尾 三連伸縮梯子
CN105888525A (zh) * 2016-06-12 2016-08-24 吴江市三达五金工具厂 一种方便收纳的组合式梯子
CN110344746A (zh) * 2019-04-29 2019-10-18 珠海五八科技有限公司 一种操作便捷的伸缩梯

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3347340A (en) * 1966-01-20 1967-10-17 Werner Co Inc R D Extension ladders
US3402788A (en) * 1967-05-25 1968-09-24 Werner Co Inc R D Extension ladders

Also Published As

Publication number Publication date
NO891964D0 (no) 1989-05-16
NO167473B (no) 1991-07-29
NO891964L (no) 1990-11-19
WO1990014491A1 (en) 1990-11-29
FI915377A0 (fi) 1991-11-14
DE69008177D1 (de) 1994-05-19
DE69008177T2 (de) 1994-09-29
AU5650790A (en) 1990-12-18
JPH04505354A (ja) 1992-09-17
NO167473C (no) 1991-11-06
ATE104402T1 (de) 1994-04-15
DK0479797T3 (da) 1994-08-08
EP0479797A1 (de) 1992-04-15

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