EP0005690B1 - Doppelte Schiebeleiter oder Stehleiter - Google Patents
Doppelte Schiebeleiter oder Stehleiter Download PDFInfo
- Publication number
- EP0005690B1 EP0005690B1 EP79870013A EP79870013A EP0005690B1 EP 0005690 B1 EP0005690 B1 EP 0005690B1 EP 79870013 A EP79870013 A EP 79870013A EP 79870013 A EP79870013 A EP 79870013A EP 0005690 B1 EP0005690 B1 EP 0005690B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ladder
- uprights
- double
- section
- parts
- 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
Links
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 230000008602 contraction Effects 0.000 claims 1
- 210000003414 extremity Anatomy 0.000 claims 1
- 230000037431 insertion Effects 0.000 claims 1
- 238000003780 insertion Methods 0.000 claims 1
- 239000002184 metal Substances 0.000 claims 1
- 210000001364 upper extremity Anatomy 0.000 claims 1
- 230000000903 blocking effect Effects 0.000 description 4
- 241000388002 Agonus cataphractus Species 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
Images
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 rungs, that is to say foldable without disassembly and self-locking in support ladder or ladder extendable to different heights, consisting of two parts each itself constituted by upright uprights having an identical profile in the general shape of an open straight U facing each other, and between which are fixed by a pivot axis identical steps 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 the ladder open, these two parts of the ladder being linked by a joining piece, which is fixed in limited pivoting near the upper end of one of the two parts of the ladder, part which has a generally T-shaped head, sliding in a generally T-shaped guide groove on the other part of the ladder so that one of the two parts of the ladder can both slide r parallel to the other and / or pivot relative to the other, and moreover one of the two parts comprising a means intended to hold in position a part of the ladder relative to the other when it
- each part of the ladder comprises only two uprights, that the rungs are made in a single part and are connected to the uprights by pivot pins located at each end, that the means of keeping open the ladder is a flat articulated freely below a rung and is placed under the rung when the ladder is closed, that the guide groove is in the side of the uprights, that the fastening piece is a flat elongated piece with the exception of its T-shaped head which slides in the guide groove, that the means intended to hold in position part of the scale relative to the other is a dish finished by a hook-shaped nose which comes out of the uprights of the part of the ladder in which the head of the fastening part slides and which can come to engage in a certain number of slots provided at different heights in the uprights of the other part of the ladder, and in the closed position, the ladder takes the form of a simple box without any protuberance, that is to say the abovementioned parts do not exceed the general plane of the external face of the sides of the profiles used as
- 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 storage, storage and transport position, it is in the form of a long box, of a profile, without any element coming out. , rectangular in shape close to a square with one side equal to twice the lateral side of an upright and the other side, twice the central side of an upright plus a slight gap provided between the parts of the 'ladder.
- FIG. 1 schematically a side view of the double ladder in the storage position
- FIG. 2 schematically a front view of the double ladder used as an extendable ladder, one part raised by one rung relative to the other,
- 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 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 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 scale is shown in use extendable ladder, part 1 being raised by one rung relative to part 5.
- the double ladder 1, 5 is shown in use of a supported ladder, part 5 serving as a support to part 1 in order to give a perfect seat to this support part 5, the uprights 6, 7 have at their lower parts sections 6a, 7a, separable (fig. 5).
- the profile 16 provided for making the rungs 4, 8 which has the general shape of a U whose central part 17, at least the outer face 17a, is preferably slightly convex and provided with grip ribs while the side portions 18, 19 are straight.
- this connecting piece 20 whose head 21 is firstly slid into the groove 13 of a profile 9 used as amount 2, 3 of part 1 of the double ladder and on the other hand held inside a profile 9, used as an upright 6, 7 of part 5 of the double ladder, by a pivot axis 27 passing through the opening 22 ( Fig. 12) which is located near the upper end of these uprights 6, 7.
- a slot 28 is provided in the groove 13 of an upright 6, 7 of part 5 of the double ladder for inserting the part 20 therein, slot 28 long enough so as not to prevent the desired pivoting of the part 20 which, as visible in FIG.
- 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 section 9 which it straddles as visible in 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 lifting first part 1 of the ladder upwards (arrow 32) to release the notch 29b, the head 21 of the joining piece 20 held by the parts of the double ladder, sliding in the groove 13 of part 1 of the double ladder, and then then, jointly, by lifting (arrow 32) and moving aside (arrow 33) part 1 of the double ladder relative to part 5, the securing part 20 pivoting in part 5 of the double ladder.
- both the dishes 29 and the slots 31 will be arranged so that the rungs, sections of the two parts 1 and 5 facing each other, are also located opposite screws, 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 pin 36 held by the lateral parts 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 thence the stop axis 36 even when the ladder is in the closed position (solid lines in FIG. 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 the upright 7 when the ladder is opened, that is to say bringing the rungs horizontally (dotted lines, fig. 13) so that part of the dish, preferably higher in part 34b, spring of the amount 7. It is this part coming out of the amount 7 that will be raised to release the dish 34 from the stop axis 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, andtwo perpendicular wings 43 and 44 which are provided asymmetrically with respect to the central part so that by using a section of section 41 in the upright of one of the two parts 5, 5a and another section of section 4la identical but reversed in the other, the wings 43 and 44 of the section 41 are in a different parallel plane than the wings 43a and 44a of the section 41a (fig. 16) and as visible in FIG.
- these sections of profile 41 and 41a also being cut at 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 at otherwise 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 downwards 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 ladder or, for example, at halfway 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. Since no element will not protrude to this box, 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 stop axis 36 of the plate 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 11a and 12a, respectively of the lateral sides 11 and 12 of the profile 9, a withdrawal strip 11b and 12b respectively (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 11a and 12a of the lateral sides 11 and 12 of the profile
- both the fastening pieces 20 and the hook plates 29 and the profile sections 41 and 41a will be fixed from the inside in the profile 9 used as the amount of the double ladder.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ladders (AREA)
- Electroluminescent Light Sources (AREA)
Claims (13)
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 EP0005690A2 (de) | 1979-11-28 |
EP0005690A3 EP0005690A3 (en) | 1979-12-12 |
EP0005690B1 true 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) |
Families Citing this family (16)
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 |
DE3631673A1 (de) * | 1986-09-18 | 1988-04-07 | Loh Kg Hailo Werk | Doppelsprossenleiter |
DE3825299A1 (de) * | 1988-07-26 | 1990-02-01 | Loh Kg Hailo Werk | Doppelsprossenleiter |
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 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1051152A (de) * | ||||
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. |
US3100552A (en) * | 1961-02-21 | 1963-08-13 | Hopfeld Henry | Convertible ladder |
FR1593286A (de) * | 1968-11-20 | 1970-05-25 | ||
AU7905575A (en) * | 1974-03-14 | 1976-09-16 | Hickman Designs Ltd | Ladder |
GB1497253A (en) * | 1974-12-18 | 1978-01-05 | Abru Aluminium Ltd | Step ladders |
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 |
DE2657985A1 (de) * | 1976-12-21 | 1978-06-29 | Wolfgang Tellenbach | Leiter |
-
1978
- 1978-05-23 BE BE187943A patent/BE867361A/xx not_active IP Right Cessation
-
1979
- 1979-05-07 EP EP79870013A patent/EP0005690B1/de not_active Expired
- 1979-05-07 AT AT79870013T patent/ATE88T1/de not_active IP Right Cessation
- 1979-05-07 DE DE7979870013T patent/DE2960416D1/de not_active Expired
- 1979-05-16 CA CA327,793A patent/CA1103629A/en not_active Expired
- 1979-05-21 US US06/040,724 patent/US4256200A/en not_active Expired - Lifetime
- 1979-05-23 JP JP6452579A patent/JPS54154671A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
CA1103629A (en) | 1981-06-23 |
EP0005690A3 (en) | 1979-12-12 |
JPS54154671A (en) | 1979-12-05 |
EP0005690A2 (de) | 1979-11-28 |
ATE88T1 (de) | 1981-07-15 |
US4256200A (en) | 1981-03-17 |
BE867361A (fr) | 1978-09-18 |
DE2960416D1 (en) | 1981-09-24 |
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