EP0005690A2 - Doppelte Schiebeleiter oder Stehleiter - Google Patents

Doppelte Schiebeleiter oder Stehleiter Download PDF

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Publication number
EP0005690A2
EP0005690A2 EP79870013A EP79870013A EP0005690A2 EP 0005690 A2 EP0005690 A2 EP 0005690A2 EP 79870013 A EP79870013 A EP 79870013A EP 79870013 A EP79870013 A EP 79870013A EP 0005690 A2 EP0005690 A2 EP 0005690A2
Authority
EP
European Patent Office
Prior art keywords
uprights
ladder
profile
double
sections
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.)
Granted
Application number
EP79870013A
Other languages
English (en)
French (fr)
Other versions
EP0005690B1 (de
EP0005690A3 (en
Inventor
Gilbert Loix
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
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 Individual filed Critical Individual
Priority to AT79870013T priority Critical patent/ATE88T1/de
Publication of EP0005690A2 publication Critical patent/EP0005690A2/de
Publication of EP0005690A3 publication Critical patent/EP0005690A3/xx
Application granted granted Critical
Publication of EP0005690B1 publication Critical patent/EP0005690B1/de
Expired 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
    • E06C1/38—Special constructions of ladders, e.g. ladders with more or less than two longitudinal members, ladders with movable rungs or other treads, longitudinally-foldable ladders
    • E06C1/383—Foldable ladders in which the longitudinal members are brought together on folding
    • 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
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C5/00—Ladders characterised by being mounted on undercarriages or vehicles Securing ladders on vehicles
    • E06C5/02—Ladders characterised by being mounted on undercarriages or vehicles Securing ladders on vehicles with rigid longitudinal members
    • E06C5/04—Ladders characterised by being mounted on undercarriages or vehicles Securing ladders on vehicles with rigid longitudinal members capable of being elevated or extended ; Fastening means during transport, e.g. mechanical, hydraulic
    • E06C5/16—Ladders characterised by being mounted on undercarriages or vehicles Securing ladders on vehicles with rigid longitudinal members capable of being elevated or extended ; Fastening means during transport, e.g. mechanical, hydraulic using mechanical transmission only, with or without fluid or other non-mechanical couplings or clutches
    • 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
    • E06C7/46—Non-skid equipment

Definitions

  • the present invention relates to a double ladder with retractable steps that can be transformed without dismantling into a support ladder or extendable flat ladder.
  • each part is constituted by two straight uprights having an identical profile in the general shape of a straight U-shaped open facing and between which are fixed, by a pivot axis, identical rungs having a profile in the general shape of an open U of dimensions smaller than the profile of the uprights, at least one of the two parts comprising a means of keeping open the ladder, fixed means and coming to be placed under a rung when the ladder is closed, profile of the uprights comprising, on the lateral side forming a base, a guide groove in the general shape of T and in which is slid, in the two uprights of part of the ladder, the general T-shaped head of a piece for securing, otherwise flat, the two parts of the ladder, a joining part which is fixed in limited pivoting near the upper end of the two other uprights of the other part of the ladder so that one of the two parts of the ladder can both
  • each of the two uprights of the part of the ladder intended to serve as a support ends below the last lower rung by a section of profile associated with the upper part by a pivoting means limited towards the outside. so as to give a wider base to the support part of the ladder which may be necessary and even compulsory to comply with legal safety standards in certain countries.
  • a system for example of locking balls prevents, except by force, the opening towards a spacing position of these sections with respect to the rest of the uprights and the maintenance in the spacing position.
  • the double ladder according to the invention is remarkable in that in the position of storage, storage and transport, it is in the form of a long box, of a profile, without element coming out, of rectangular shape close to a square of which one side is equal to twice a lateral side of an upright and l on the other side, twice the central side of an upright plus a slight gap provided between the parts of the ladder.
  • the double ladder consists of a first part 1 having amounts 2, 3 and steps 4, a second part 5 having amounts 6, 7 and steps 8.
  • the double scale 1, 5 can be used and be presented in different ways; fig. 1, fully folded on the one hand part 1 against part 5 but also the amount 3 brought against the amount 2 of the same part 1 and the amount 7 against the amount 6 of the same part 5 of the double scale because the rungs, respectively 4 and 8, of the two parts 1, 5 are joined by pivot axes (not shown) at each end to the uprights 2, 3 and 6, 7.
  • the double ladder 1, 5 is therefore closed, in the storage and transport position; it is in the form of a long box with a rectangular profile very close to a square formed by the four identical uprights 2, 3, 6, 7.
  • the double ladder 1, 5 is shown in use of an extendable ladder, the part 1 being raised by one step relative to the part 5.
  • the double ladder 1, 5 is shown in use of a supported ladder, the part 5 serving as a support for the part 1 in order to give a perfect seat to this support part 5, the uprights 6, 7 have sections 6a, 7a at their lower parts separable (fig. 5).
  • extruded profiled metal elements are used, preferably aluminum.
  • the profile 9 provided for making the four uprights 2, 3; 6, 7 which has the following characteristics: it has the shape of a straight U whose external face of the central part 10 is straight and will form the external lateral face of each upright 2, 3; 6, 7 and whose outer side 11a of one of the two lateral parts 11 is straight and will form the free side of the uprights 2, 3; 6, 7 and of which the other lateral part 12 serves as a base (that is to say the side of an upright of a part of the double ladder opposite the side of the upright of the 'other part) to the external face 12a provided with a guide groove 13 in the general shape of T.
  • the two lateral parts 11, 12 are provided opposite a support wing respectively 14, 15 perpendicular to itself, that is to say parallel to the central part 10.
  • the dish 29 In order to prevent floating and to block the extendable part 1 of the double ladder with respect to the part 5, the dish 29 also has a straight downward facing notch 29b, the width of which is only slightly greater than the side of the profile 9 which it spans as visible to the FIG. 11.
  • the height of the slot 31 will be sufficient only to allow the notch 29b to be released and the hook nose 29a to come out, an operation which is easily carried out by first lifting part 1 of the ladder towards the top (arrow 32) to release the notch 29b, the head 21 of the joining piece 20 held by part 5 of the double ladder, gt issant in the groove 13 of part 1 of the double ladder, and then then, jointly, by lifting (arrow 32) and moving aside (arrow 33) the part 1 of the double ladder relative to the part 5, the securing part 20 pivoting in the part 5 of the double ladder.
  • the hook parts 29a of the dishes 29 must be released from the slots 31 and from part 1 separated from part 5 of the double ladder (arrow 33) except at the level of the joining piece 20.
  • the head 1 can therefore slide perfectly upwards relative to part 5, the head 21 of the attachment piece held by the part 5 sliding in the groove of the part 1 of the double ladder, in addition, the outer end of the hook nose 29a can slide in and against the bottom of the groove 13 of the part 5 and this until it encounters a slit 31 surmounting the previous one, into which it will enter, unless part 1 is kept apart, which allows the movement to continue upwards of this part 1 compared to part 5.
  • the hooked nose As soon as the hooked nose has been fully introduced and 29a in a slot 31, it will of course descend again until the notch 29b will take on the edge of the slot 31, which drives the dish 29 and therefore the part 1 also slightly downwards.
  • It is preferably provided at least one dish 29 fixed to each of the uprights 2, 3 of part 1 of the double ladder, but one can provide two per upright, in this case distant by a height equivalent to the gap between steps 4 or 8 and therefore at least slots 31 in each of the uprights 6, 7 of part 5; remote slots 31, on each upright, of this same height.
  • both the flats 29 and the slots 31 will be arranged so that the steps, sections of the two parts 1 and 5 facing each other, are also facing each other. opposite, that is to say horizontally parallel.
  • this holding means is a dish 34 held by a free pivot axis 35 below a rung 8 of part 5 of the double ladder, preferably a rung 8 located at a height easily reached by hand (c (i.e. for example between one meter and one meter fifty).
  • This dish 34 has a cutout forming a stop notch 34a and is terminated by a triangular refined part 34b.
  • the stop notch 34a is intended to block the plate 34 on a stop axis 36 held by the side blanks 11, 12 of the profile 9 used as an upright 7.
  • the length of the plate 34 is such that its triangular part 34b necessarily comes by beyond the stop axis 36 even when the ladder is in the closed position (solid lines in Figure 13), the stop axis 36 forcing the end 34b of the dish to pass through an opening 37 provided in the central part 10 of the profile 9 used as upright 7 when the ladder is opened, that is to say bring the rungs 8 horizontally (dotted lines, fig. 13) so that part of the dish, preferably higher at part 34b, spring from the upright 7. It is this part emerging from the upright 7 that will be raised to release the dish 34 from the stop pin 36 and to be able to close the double ladder.
  • another profile 41 (fig. 10) having the general shape of an asymmetrical gantry, the essential characteristics of which are a central part 42 which will come to bear against part 10 of the profile 9 used for the uprights and upright sections of part 5, 5a of the ladder, and two perpendicular wings 43 and 44 which are provided asymmetrically with respect to the central part so that by using a section of profile 41 in the upright of one of the two parts 5, 5a and another identical section of section 41a but overturned in the other, the wings 43 and 44 of the section 41 lie in a different parallel plane than the wings 43a and 44a of the section 41a (fig. 16) and as can be seen in FIG.
  • these sections of profile 41 and 4la also being cut in a bevel like the parts 5 and 5a with the exception of a part of their wings respectively 43, 44 and 43a, 44a which are on the contrary extended , they can face each other so as to introduce a pivot axis 45 (fig. 16).
  • the pivoting of the upright sections 6a and 7a of the part 5a with respect to the uprights 6, 7 of the part 5 is limited between the bearing faces 39, 39a and 40, 40a.
  • a locking ball system is provided provided with a thrust spring. (not shown) and which can successively be placed partially either in the cell 46 or the cell 47 of a wing respectively when the parts 5a are in the extension or separated from the parts 5 of the double ladder.
  • end pieces 50 are provided having a double seat down 50a and 50b, the part 50c having the same bevel slope as the bevel cut 39 of the part 5 or of the part 5a of the separable section (fig. 15).
  • end caps 50 have the same characteristics as the end pieces 48, that is to say that the part 50a has a convex curvature, that part of the end piece 50c fits into the profile 9 used as the upright 6a. , 7a of part 5a; the end pieces 50 will also be held by a fixing pin 49.
  • part 5 of the double ladder comprises parts 5a of separable sections (variant)
  • the height of this part 5a will always be slightly less than the distance from the ground and the first rung 8; in this case, the dishes 29 can no longer be arranged at any level of the uprights 2, 3 of part 1 of the scale; in fact, the slots 31 will be unusable at the level of the profile sections 41 and 41a and either provision is made to place the dishes 29 beyond the first rung 4 of part 1 of the double scale or else, for example, mid height between the ground and the first rung 4, that is to say in principle also halfway between two rungs 4 ... but, it is not essential that this be so.
  • the double ladder described is therefore remarkable for the double possibility of use that it offers, extendable ladder or supported ladder, but also by its possibility of being brought, in the closed position, to form only a single box, which is particularly useful for its storage and transport.
  • the storage of a batch of double ladders will be without any problem, in fact, if to hold the pivot axes 38 of steps 4 and 8, the fixing axes 49 of the ends 48 and 50, the abutment axis 36 of the flat 34, it may be necessary to provide rivets or other means (not shown) to be placed outside of the profiles 9 used for the uprights of the two parts 1 and 5 of the double ladder, there is provided at each of the outer faces Ila and 12a, respectively of the lateral sides Il and 12 of the profile 9, a withdrawal strip respectively Ilb and 12b (fig. 6) so that the outer end of the head of the rivets (not shown) will not exceed the general plane of the external face, respectively lla and 12a of the lateral
  • both the fastening parts 20 and the hook plates 29 and the section sections 41 and 41a will be fixed from the inside in the section 9 used as the amount of the double ladder.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ladders (AREA)
  • Electroluminescent Light Sources (AREA)
EP79870013A 1978-05-23 1979-05-07 Doppelte Schiebeleiter oder Stehleiter Expired EP0005690B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT79870013T ATE88T1 (de) 1978-05-23 1979-05-07 Doppelte schiebeleiter oder stehleiter.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE187943 1978-05-23
BE187943A BE867361A (fr) 1978-05-23 1978-05-23 Echelle double extensible ou a appui

Publications (3)

Publication Number Publication Date
EP0005690A2 true EP0005690A2 (de) 1979-11-28
EP0005690A3 EP0005690A3 (en) 1979-12-12
EP0005690B1 EP0005690B1 (de) 1981-06-17

Family

ID=3843118

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79870013A Expired EP0005690B1 (de) 1978-05-23 1979-05-07 Doppelte Schiebeleiter oder Stehleiter

Country Status (7)

Country Link
US (1) US4256200A (de)
EP (1) EP0005690B1 (de)
JP (1) JPS54154671A (de)
AT (1) ATE88T1 (de)
BE (1) BE867361A (de)
CA (1) CA1103629A (de)
DE (1) DE2960416D1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0260544A1 (de) * 1986-09-18 1988-03-23 Hailo-Werk Rudolf Loh GmbH & Co. KG Doppelsprossenleiter
EP0352598A1 (de) * 1988-07-26 1990-01-31 Hailo-Werk Rudolf Loh GmbH & Co. KG Stehleiter

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS593999U (ja) * 1982-06-30 1984-01-11 井上鉄工株式会社 脚立兼用梯子
GB2152125B (en) * 1983-12-23 1987-07-29 Alinco Inc Foldable ladder
US5638918A (en) * 1995-07-18 1997-06-17 Hebda; Dorothy E. Ladder conversion kit
US20060032708A1 (en) * 2002-04-19 2006-02-16 Welsh Graham K Collapsible ladder
US7424933B2 (en) * 2002-05-28 2008-09-16 Norman Miller Ladder assemblies
US6991063B2 (en) * 2003-08-07 2006-01-31 Werner Co. Stowable ladder configured for installation in an opening
AU2005203398A1 (en) * 2005-08-02 2007-02-22 Laddaloc Pty Ltd Collapsible ladder
CA2759248C (en) * 2009-04-24 2015-06-23 Michael Fitzgerald An adjustable base extender for a ladder
US20140262621A1 (en) * 2013-03-15 2014-09-18 Hailo-Werk Rudolf Loh Gmbh & Co. Kg Step Ladder
US10538966B2 (en) * 2017-05-10 2020-01-21 Werner Co. Ceiling ladder, deep step and method
CN109209216B (zh) * 2018-07-22 2020-05-19 广东博智林机器人有限公司 一种折叠式维修用智能爬梯
US11834908B2 (en) * 2019-09-12 2023-12-05 Werner Co. Interlocking ladders and components thereof
CN112145065A (zh) * 2020-08-14 2020-12-29 河北省金具电力有限公司 一种折叠绝缘梯及其加工工艺和使用方法
CN113090072B (zh) * 2021-04-10 2022-05-20 新力建设集团有限公司 一种适用于深基坑放坡式开挖施工的安全梯道及装配方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1051152A (de) *
US3100552A (en) * 1961-02-21 1963-08-13 Hopfeld Henry Convertible ladder
FR1593286A (de) * 1968-11-20 1970-05-25
FR2264170A1 (de) * 1974-03-14 1975-10-10 Hickman Designs Ltd
GB1497253A (en) * 1974-12-18 1978-01-05 Abru Aluminium Ltd Step ladders
DE2657985A1 (de) * 1976-12-21 1978-06-29 Wolfgang Tellenbach Leiter

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US193081A (en) * 1877-07-17 Improvement in step-ladders
US798388A (en) * 1905-03-06 1905-08-29 John H W Bodendieck Ladder.
US860065A (en) * 1906-06-16 1907-07-16 Francis E Scott Store-service extension-ladder.
US958732A (en) * 1908-03-06 1910-05-24 Dennis Novelty Ladder Company Ladder.
BE840773R (fr) * 1975-05-26 1976-08-02 Echelle metallique repliable formant plateau
US4027741A (en) * 1976-07-15 1977-06-07 Shakespeare Company Locking hinge mechanism for a stepladder

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1051152A (de) *
US3100552A (en) * 1961-02-21 1963-08-13 Hopfeld Henry Convertible ladder
FR1593286A (de) * 1968-11-20 1970-05-25
FR2264170A1 (de) * 1974-03-14 1975-10-10 Hickman Designs Ltd
GB1497253A (en) * 1974-12-18 1978-01-05 Abru Aluminium Ltd Step ladders
DE2657985A1 (de) * 1976-12-21 1978-06-29 Wolfgang Tellenbach Leiter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0260544A1 (de) * 1986-09-18 1988-03-23 Hailo-Werk Rudolf Loh GmbH & Co. KG Doppelsprossenleiter
EP0352598A1 (de) * 1988-07-26 1990-01-31 Hailo-Werk Rudolf Loh GmbH & Co. KG Stehleiter

Also Published As

Publication number Publication date
ATE88T1 (de) 1981-07-15
BE867361A (fr) 1978-09-18
EP0005690B1 (de) 1981-06-17
DE2960416D1 (en) 1981-09-24
EP0005690A3 (en) 1979-12-12
JPS54154671A (en) 1979-12-05
US4256200A (en) 1981-03-17
CA1103629A (en) 1981-06-23

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