EP3719245B1 - Échelle - Google Patents

Échelle Download PDF

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Publication number
EP3719245B1
EP3719245B1 EP20163227.0A EP20163227A EP3719245B1 EP 3719245 B1 EP3719245 B1 EP 3719245B1 EP 20163227 A EP20163227 A EP 20163227A EP 3719245 B1 EP3719245 B1 EP 3719245B1
Authority
EP
European Patent Office
Prior art keywords
ladder
rung
steps
rungs
plane
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.)
Active
Application number
EP20163227.0A
Other languages
German (de)
English (en)
Other versions
EP3719245A1 (fr
Inventor
Jürgen Steinbrecher
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.)
Krause Werk GmbH and Co KG
Original Assignee
Krause Werk 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 Krause Werk GmbH and Co KG filed Critical Krause Werk GmbH and Co KG
Publication of EP3719245A1 publication Critical patent/EP3719245A1/fr
Application granted granted Critical
Publication of EP3719245B1 publication Critical patent/EP3719245B1/fr
Active 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
    • E06C1/00—Ladders in general
    • E06C1/02—Ladders in general with rigid longitudinal member or members
    • E06C1/14—Ladders capable of standing by themselves
    • E06C1/24—Non-hinged free-standing ladders
    • E06C1/28—Non-hinged free-standing ladders multi-part
    • E06C1/30—Non-hinged free-standing ladders multi-part extensible, e.g. telescopic
    • 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
    • E06C1/14—Ladders capable of standing by themselves
    • E06C1/16—Ladders capable of standing by themselves with hinged struts which rest on the ground
    • E06C1/18—Ladders capable of standing by themselves with hinged struts which rest on the ground with supporting struts formed as ladders
    • 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
    • E06C1/14—Ladders capable of standing by themselves
    • E06C1/16—Ladders capable of standing by themselves with hinged struts which rest on the ground
    • E06C1/20—Ladders capable of standing by themselves with hinged struts which rest on the ground with supporting struts formed as poles
    • E06C1/22—Ladders capable of standing by themselves with hinged struts which rest on the ground with supporting struts formed as poles with extensible, e.g. telescopic, ladder parts or struts
    • 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
    • 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
    • E06C7/082—Connections between rungs or treads and longitudinal members
    • E06C7/084—Rungs comprising projecting tabs or flanges
    • 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
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C7/00—Component parts, supporting parts, or accessories
    • E06C7/48—Ladder heads; Supports for heads of ladders for resting against objects

Definitions

  • the invention relates to a multi-part ladder with an inner ladder that can be slid along another ladder, such as a middle or outer ladder, the inner ladder having treads from the group of rungs and steps running between stiles and the further ladder having rungs running between stiles.
  • Multi-part ladders such as extension ladders can have three ladders, an inner ladder, a middle ladder and an outer ladder, which can be slid relative to one another and are suitable for working heights of more than 10 m.
  • An embodiment as a two-part ladder consisting of an inner conductor and an outer conductor is also known.
  • Double stepladders with an extension, which is an inner ladder, are also known.
  • Corresponding multi-part conductors have the advantage that the inner conductor can be removed from the other conductor or conductors and used in isolation from them.
  • Multi-section ladders do not meet these requirements if both the inner and the middle or outer ladder have rungs with a width B with 20 ⁇ B ⁇ 80 mm.
  • EP 1 607 570 A2 shows a multi-part ladder, where the rungs of the inner ladder can be provided with additional profiles in order to achieve a wider standing surface.
  • the extended utility can also be provided by a single profile. It is not necessary for all steps of the inner ladder to have a correspondingly wide standing profile.
  • the present invention is based on the object of developing a multi-part ladder of the type mentioned at the outset in such a way that the user has a sufficiently large standing area available that enables safe working, while at the same time ensuring that a transition between the Ladders omitted.
  • the invention essentially provides that the bottom step of the inner ladder is a rung and, apart from the rung, all other steps of the inner ladder are steps.
  • the inner ladder (apart from the lowest step—has steps which, in terms of depth, meet the statutory provisions, ie have a step width which is at least 80 mm according to the applicable provisions. Because the step is an integral part of the ladder, a separate component is not required.
  • the invention is therefore also characterized in that when the inner conductor and other conductors are shifted and fixed relative to one another, the front end regions or sections of these of the rung of the inner ladder, the immediately following step of the inner ladder and the rung of the other ladder running directly below the rung are in or run approximately in a common first plane.
  • each step should have a minimum width according to DIN EN 131 in the current version.
  • the steps are aligned with the rungs in particular in such a way that the top of the step spans a plane which, when the inner ladder is displaced and fixed in relation to the further ladder, extends in the region of a rung of the further ladder in such a way that the upper edge or upper surface, as Tread area that runs adjacent or nearly adjacent to the rung in the plane of, or slightly below, the step.
  • the spacing of the steps should correspond to that of a rung ladder, so that it is provided that the spacing of successive steps is equal to that of successive rungs of the further ladder.
  • the distance between the rung of the inner ladder and the following step should be the same distance as between successive rungs of the further ladder.
  • each spar has a corresponding supporting device.
  • the design according to the invention of the inner conductor of a corresponding ladder is explained using a double ladder or double ladder with extension, without thereby limiting the teaching according to the invention. Rather, this applies to all multi-part ladders in which an inner ladder can be displaced and positioned along a wider ladder.
  • the other ladder can be the middle ladder of a three-part ladder or the outer ladder of a two-part ladder or—as in the case of a trestle, double or articulated ladder—an extension.
  • the inner ladder is characterized in that the distance between its rails is smaller than that of the adjacent ladder, so that the rails serve as a sort of guide for the inner ladder.
  • a double-jointed ladder 10 is shown with a first ladder 12 and a second ladder 14, each of which has rungs running between uprights 16, 18 and 20, 22, some of which have the reference numerals 24, 26, 28 and 30, 32, 34 Marked are.
  • the ladder 14 also has a traverse 36 running on the bottom side, via which the standing width is increased.
  • An inner ladder 38 is arranged to be displaceable along the ladder 12 and has bars 40, 42, between which treads 44, 46, 48 run.
  • the distance between the bars 40, 42 is smaller than that of the bars 16, 18 of the conductor 12.
  • the distance between the bars 16, 18 and 40, 42 is such that the bars 40, 42 of the inner conductor 38 along the insides of the bars 16.18 are slidably guided.
  • the ladder 12 with the inner ladder 38 thus forms an extension ladder overall in order to be able to work at working heights that exceed the height of the ladder 10 .
  • the rungs 24, 26, 28 of the ladder 12 can be, for example, square profiles or other suitable shapes which are connected to the uprights 16, 18, for example by welding, crimping or riveting.
  • the rungs 24, 26, 28 offer standing areas which are equal to or greater than 20 mm and less than 80 mm in the depth referred to as width.
  • the rungs 30, 32, 34 of the ladder 14 can be designed accordingly.
  • Width B is the extent of the steps 46, 48 with respect to their depth.
  • the length L of the steps 46, 48 is the clear distance between the insides of the rails 40, 42.
  • the height H of the steps 46, 48 is the extension of the steps 46, 48 in the longitudinal direction of the ladder 38.
  • the bottom step 44 of the ladder 38 is designed in the manner of a rung, consequently has a width that is equal or approximately equal to the width of the rungs 24, 26, 28 of the ladder 12. This results in a continuous transition between the subsequent stage 46 and when fixed The inner conductor 38 runs in the foot region of the rung 50 of the conductor 12, since the rung 44 of the inner conductor 38 runs between them.
  • the rung 50 of the ladder 12 running below the lowest step 44a is also shown. If a user climbs down the ladder 10, the transition between the step 44a and the rung 50 is characterized by a large setback, as illustrated by the straight line 52. As a result, there is a risk that when a user stands with a full foot on the step 44a, when descending onto the set-back rung 50 underneath, only the tip of his toes touches down, so that there is a risk of accidents.
  • the straight line 52 encloses an angle ⁇ with a straight line 55 on which the rungs 50, 51, 53 of the further conductors 12 lie with their end faces or areas.
  • the angle ⁇ is approximately 15° to 17° or 16° or approximately 16°.
  • the bottom step 44 of the inner ladder 38 running on the foot side is designed as a rung, so that there is a smooth transition to the step 46 and the rung 50 of the ladder 12, as illustrated by the straight line 54, which when the ladder is erected 10 runs inclined to the vertical.
  • the straight line 54 which when the ladder is erected 10 runs inclined to the vertical.
  • the front areas or edges of the rungs 50, 44 and the step 46 run in a plane that is symbolized by the straight line 54.
  • the straight line 54 lies in a plane that is spanned by the front end regions 44 and the subsequent step 46 of the inner conductor 38 and the rung 44 of the further conductor 12 when the inner conductor 38 is shifted to the further conductor 12 and fixed.
  • the corresponding straight line 54 or plane encloses an angle ⁇ of between 8° and 10° in particular with the straight line 55 on which the rungs 50, 51, 53 of the further ladder 12 lie with their end faces or areas. is in particular 9° or approximately 9°.
  • the rung 44 as the lowest step of the inner conductor 38 offers further advantages. It is thus possible to grasp the rung 44 of the inner conductor 38 without any problems in order to be able to move it. A step does not offer such an advantage, since its width is usually considerably greater than that of the rung 44 .
  • the inner ladder 38 can easily be hooked in or latched via the rung 44, as is also the case with extension ladders according to the prior art.
  • the steps 46, 48 of the inner ladder 38 define a plane 47, 49 which extends with respect to the associated rungs 51, 53 of the ladder 12 such that the rungs 51, 53 are adjacent or nearly adjacent to the plane 47.49, but run below this.
  • the respective upper edge or surface of the rung 51, 53 of the ladder 12 run in or approximately in or slightly below the plane that is spanned by the step 46, 48 or its base.
  • the steps 44, 46 are exemplified by U-shaped base members 56, 58 mounted on mutually parallel edges folded sheet metal elements 60, 62 formed.
  • Other constructions are of course also possible.
  • the rung-like tread 44 which should have a footprint that is the same as that of the rungs 24, 26, 28 of the ladder 12, has a corresponding U-shaped base element 62 with this covering standing plate 63, the width of which, as mentioned, is similar to that of the rungs 24, 26, 28 , 50 is adjusted.
  • Other geometries are of course possible.
  • D-stage 100 So is in figure 5 a so-called “D-stage” 100 is shown, specifically in the illustration on the left in plan view and in the illustration on the right in section.
  • the base 102 has a width of at least 80 mm.
  • profile sections 106, 108 protrude laterally over the standing surface 102, which pass through the notches in the rails of the ladder and are then crimped to them.
  • the level 200 according to 6 can be referred to as a V-step due to the cross-sectional geometry, the section 204 forming a standing surface 202 starting from a V-shaped profile element 206 which is riveted or welded to the spars, for example.
  • the base 202 has a width B of at least 80 mm.
  • the step 300 has a base 302 with a width of at least 80 mm.
  • a web 306 designed as a flat profile protrudes from the underside of the corresponding section 304 having the standing surface 302 .
  • the base section 302 merges in its front edge region into a profile section 308, which consists of a section 310 which is triangular in section and one of its base protruding section 308 composed.
  • a corresponding profile can be riveted to the bars.
  • the teaching according to the invention applies to all ladders that have an inner ladder, i.e. for step or trestle ladders with extensions, multi-part leaning ladders, multi-purpose ladders.
  • corresponding ladders As a workplace.
  • a corresponding use also applies to the inner conductor itself, i.e. detached from the conductor itself.
  • the inner conductor has, in particular, a traverse.

Landscapes

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

Claims (11)

  1. Échelle (10) à plusieurs éléments, avec une échelle intérieure (38) qui est coulissable le long d'une autre échelle (12), telle qu'une échelle centrale ou extérieure, sachant que l'échelle intérieure présente des échelons (44, 46, 48) s'étendant entre les montants (40, 42) et appartenant à la catégorie barreau (44), marche (46, 48, 100, 200, 300) et que l'autre échelle présente des barreaux (24, 26, 28, 50) s'étendant entre les montants (16, 18),
    caractérisée en ce
    que l'échelon inférieur (44) de l'échelle intérieure (38) est un barreau et qu'excepté le barreau (44), tous les autres échelons de l'échelle intérieure (38) sont des marches (46, 48, 100, 200, 300).
  2. Échelle à plusieurs éléments selon la revendication 1,
    caractérisée en ce
    que chacune des marches (46, 48, 100, 200, 300) présente une largeur minimale conforme à DIN EN 131.
  3. Échelle à plusieurs éléments selon la revendication 1 ou 2,
    caractérisée en ce
    que chacune des marches (46, 48,100, 200, 300) sous-tend au niveau de sa face supérieure un plan qui, lorsque l'échelle intérieure est fixée et déplacée par rapport à l'autre échelle (12), s'étend dans la zone d'un barreau (51, 53) de l'autre échelle de sorte que la surface supérieure ou le bord supérieur du barreau s'étend de manière à être adjacent(e) ou presque adjacent(e) dans le plan de la marche ou à être en dessous de celui-ci.
  4. Échelle à plusieurs éléments selon au moins une des revendications précédentes,
    caractérisée en ce
    que l'écart entre les marches consécutives (46, 48, 100, 200, 300) est égal à l'écart entre les barreaux consécutifs (24, 26, 28) de l'autre échelle (12).
  5. Échelle à plusieurs éléments selon au moins une des revendications précédentes,
    caractérisée en ce
    que l'écart entre le barreau (44) de l'échelle intérieure (38) et la marche suivante (46) est égal à l'écart entre les barreaux consécutifs (24, 26, 28) de l'autre échelle (12).
  6. Échelle à plusieurs éléments selon au moins une des revendications précédentes,
    caractérisée en ce
    que l'échelle intérieure (38) présente côté pied un dispositif de support (64, 66) formant un agrandissement de la base, partant d'au moins un des montants (40, 42).
  7. Échelle à plusieurs éléments selon au moins une des revendications précédentes,
    caractérisée en ce
    que chacune des marches est constituée d'un élément de base (56, 58) en forme de U en coupe avec un élément plat relié à celui-ci ou partant de celui-ci, notamment un élément plat en forme de L ou de U en coupe.
  8. Échelle à plusieurs éléments selon au moins une des revendications précédentes,
    caractérisée en ce
    que chacune des marches (46, 48, 100, 200, 300) est soudée, rivetée et/ou serties avec les montants (40, 42).
  9. Échelle à plusieurs éléments selon au moins une des revendications précédentes,
    caractérisée en ce
    que chacune des marches (46, 48, 100, 200, 300) est une section d'un profil extrudé.
  10. Échelle à plusieurs éléments selon au moins une des revendications précédentes,
    caractérisée en ce
    que, lorsque l'échelle intérieure (38) et l'autre échelle (12) cées et fixées l'une par rapport à l'autre, les parties avant ou sections de celles-ci, du barreau (44) de l'échelle intérieure (38), de la marche suivante (46) de l'échelle intérieure (38) et du barreau (50) de l'autre échelle (12), s'étendant juste en dessous du barreau (44), s'étendent dans ou approximativement dans un premier plan (54) commun.
  11. Échelle à plusieurs éléments selon au moins une des revendications précédentes,
    caractérisée en ce
    que le premier plan (54) forme un angle α sachant que 8 ° < α < 10 °, notamment α = 9 ° ou α fait environ 9 ° par rapport au second plan (55) sous-tendu par les barreaux (50, 51, 53) de l'autre échelle (12).
EP20163227.0A 2019-04-01 2020-03-16 Échelle Active EP3719245B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202019101834.8U DE202019101834U1 (de) 2019-04-01 2019-04-01 Leiter

Publications (2)

Publication Number Publication Date
EP3719245A1 EP3719245A1 (fr) 2020-10-07
EP3719245B1 true EP3719245B1 (fr) 2022-05-04

Family

ID=66995835

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20163227.0A Active EP3719245B1 (fr) 2019-04-01 2020-03-16 Échelle

Country Status (5)

Country Link
EP (1) EP3719245B1 (fr)
DE (1) DE202019101834U1 (fr)
ES (1) ES2923941T3 (fr)
HU (1) HUE059607T2 (fr)
PL (1) PL3719245T3 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2957543A (en) * 1956-05-23 1960-10-25 White Metal Rolling & Stamping Extension ladders
GB941531A (en) * 1960-09-02 1963-11-13 Walther Zarges Improvements in or relating to ladders
ES1057792Y (es) 2004-06-14 2005-01-01 Escaleras Escalibur S L Escalera extensible perfeccionada.
DE202015103639U1 (de) * 2015-07-10 2016-10-11 Krause-Werk Gmbh & Co. Kg Mehrteilige Leiter

Also Published As

Publication number Publication date
ES2923941T3 (es) 2022-10-03
PL3719245T3 (pl) 2022-09-12
EP3719245A1 (fr) 2020-10-07
DE202019101834U1 (de) 2019-06-03
HUE059607T2 (hu) 2022-11-28

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