EP0189929A2 - Echelle double - Google Patents

Echelle double Download PDF

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Publication number
EP0189929A2
EP0189929A2 EP86101270A EP86101270A EP0189929A2 EP 0189929 A2 EP0189929 A2 EP 0189929A2 EP 86101270 A EP86101270 A EP 86101270A EP 86101270 A EP86101270 A EP 86101270A EP 0189929 A2 EP0189929 A2 EP 0189929A2
Authority
EP
European Patent Office
Prior art keywords
stepladder
rungs
telescopic
ladder
spars
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.)
Withdrawn
Application number
EP86101270A
Other languages
German (de)
English (en)
Other versions
EP0189929A3 (fr
Inventor
Rainer Gödde
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 EP0189929A2 publication Critical patent/EP0189929A2/fr
Publication of EP0189929A3 publication Critical patent/EP0189929A3/fr
Withdrawn legal-status Critical Current

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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
    • E06C7/44—Means for mounting ladders on uneven ground

Definitions

  • the present invention relates to an inverted V-shaped stepladder, with four bars, two of which are each connected in one plane with a hinge and with the remaining bars in a spaced parallel plane with any number of rungs, at least part of the spars can be individually extended by means of these telescopic feet and can be locked in any position by means of a tensioning device.
  • stepladders When using stepladders, situations often arise in which the spar lengths have to be adjusted downwards to different height conditions in order to achieve a safe and stable installation of the ladder.
  • a typical example is a spiral or arched staircase on which a painter's ladder has to be repositioned again and again in rapidly changing positions.
  • the support surface of a ladder set up in this way can be distributed over four different levels. The different levels require that each spar be set to a different length, and the extent of the differences can be arbitrary.
  • a reversed V-shaped step ladder with bars made of wood or metal is known, on the outside of which loose extension slats can be attached as required.
  • These extension brackets can also be attached as wooden telescopic feet to the outside of the bar. It can be fixed in any position by means of clamp-like devices. The attachment and detachment of such fixation devices is extremely cumbersome and time consuming. These are loose files that have to be put together. Since the supplementary parts do not remain firmly attached to the ladder, they are often lost. Two clamps are required for each spar extension. Both have to be screwed tight. One-handed operation is not possible. Safety is not guaranteed, as a clamp that is not fully clamped can cause the corresponding extension to kink.
  • the invention is based on the object of making a step ladder of the generic type available in which the telescopic feet which can be extended into any positions can be easily and securely fixed in the desired position with a single handle.
  • the ladder according to the invention should also be as light as possible and take up little space.
  • each telescopic foot can be in any position fix securely in no time.
  • the stepladder has bars 10, from which telescopic feet 12 can be extended into any positions and are fixed in a selected position by means of a clamping device 14.
  • the spars 10 consist of profile tubes, preferably tubes with a rectangular cross section made of aluminum.
  • the telescopic feet 12 are profile tubes preferably made of aluminum with an outer cross section that matches the inner cross section of the profile tubes of the spars 10 in such a way that the telescopic feet 12 are easily guided in the spars 10.
  • a rectangular cross section is selected as the cross section, although other profiles could also be used.
  • the telescopic feet 12 have longitudinal slots 16 in two opposite walls, which in the exemplary embodiment are formed in the side walls of the telescopic feet 12.
  • a tensioning device 14 extends through openings 22, 24 (FIG. 3) through the side walls of the bars 10 and the slots 16 in the telescopic feet 12. In the released state, the tensioning device allows the telescopic feet 12 to be moved freely, while in the tensioned state it fixes the set position of the telescopic feet 12 clearly and immovably.
  • the tensioning device 14 is mounted at such a small distance from the lower opening of the bars 10; that the telescopic feet 12 still have sufficient hold in the rooms 10 when extended.
  • FIG. 2 shows an embodiment of the clamping device 14 in detail.
  • a screw 30 is passed through the openings 22 and 24 (see also FIG. 3) through the spar 10 and the slot 16 in the telescopic foot 12 guided therein.
  • the screw 30 has a head 32, the end face pointing towards the opening 24 is provided with a rotation lock, which can have, for example, the shape of a square 34 which fits into the correspondingly square opening 24.
  • a flexible disk 36 preferably made of rubber or plastic
  • a spring plate 38 preferably made of steel
  • a washer 40 preferably made of steel
  • a spring washer 42 preferably made of steel
  • a handwheel 46 that can be screwed onto the screw 30, preferably made of plastic.
  • Figure 3 shows that the flexible disc 36 fits exactly into the opening 22.
  • the flexible disc 36 is on the side facing the opening 22 of the Spring plate 38 attached, for example glued, whereby the friction-increasing disc 36 automatically lifts off the surface of the telescopic foot 12 in the released state of the clamping device 14.
  • This facilitates the immediate displacement of the telescopic foot and reduces the wear of the flexible disk 36, while on the other hand, an increased frictional pressure is exerted on the telescopic foot 12 in the tensioned state.
  • One-handed operation is also made easier.
  • the spring plate 38 is fastened to the side of the opening 22 and at a distance therefrom with the interposition of washers 48 on the outside of the spar 10, for example riveted or screwed, for example with rivets 50 (FIG. 2). In this way, the spring plate 38 is held in the released state of the tensioning device at a distance corresponding to the thickness of the washers 48 from the outer surface of the spar 10, whereby the already mentioned removal of the flexible disk 36 from the telescopic base 12 is achieved.
  • the spring ring 42 ensures that in the tensioned state of the tensioning device 14 a correspondingly large force the spring plate 38 with the flexible disk 36 below is pressed against the 'outer wall of the spar 12, while on the other hand the screw head 32 the wall of the spar 10 against the other outer surface of the telescopic foot 12 presses.
  • tensioning device 14 according to FIGS. 2 and 3 has proven to be particularly advantageous, other tensioning devices working on the same principle are possible, which secure the telescopic feet 12 in the bars 10 by pressing the walls of the bar 10 together and pressing them against the walls of the telescope ensure foot 12.
  • FIG. 4 shows, for example, a modification of the tensioning device 14 from FIGS. 2 and 3, a dome-shaped compression spring 52, under the action of the handwheel 46, causing the compression described above.
  • tensioning device Another possibility of the tensioning device would be the use of a tip lever or snap lock, as is usual with ski bindings or the like.
  • the slots and the direction of the tensioning device could be offset by 90 degrees. It would also be possible to form the longitudinal slots in the spars and to guide the telescopic feet with a C-shaped cross section over the spars. Furthermore, the telescopic feet 12 of the embodiment according to FIG. 1 could also consist of two strips arranged parallel to one another with a slot in between, as indicated in FIG. 2 at position 56.
  • the arrangement of an additional ladder such as is of general inventive importance for stepladders with telescopic feet and in particular for the stepladder according to the invention it emerges from Figure 5.
  • the additional ladder has bars 60 and a few rungs 68. Hooks 70 are provided at the upper end of the bars 60 and can be hooked into rungs 18 (see also FIG. 1) of the stepladder.
  • a strip 72 is fastened to the spars with a length which corresponds to the distance between the outer edges of the spars 10.
  • the strip 72 can also serve as the bottom rung.
  • it can have bends 74 which can overlap the spars 10 or the telescopic feet 12.
  • the rung spacing and the rung width preferably correspond to those of the stepladder.
  • the additional ladder is hung on one of the upper rungs, while when the telescopic feet are extended, the additional ladder is hung on a rung 18 so that a normal rung ladder results in combination with the stepladder.
  • Another option for filling the rung gap that occurs when the telescopic part of the stepladder is extended is to guide rungs in a slot of removable telescopic feet, which are connected to one another by flexible connecting elements, for example chains, and the uppermost rung in turn by a flexible connecting element the fixed part of the ladder.
  • the bottom rung, which is to be extended, is fixed to the fixed part of the ladder at any distance from the bottom rung of the ladder with the aid of a further flexible connecting element and a hooking element.
  • FIG. 6 shows a ladder which has bars 10, from which telescopic feet 12 can be extended in any position and are fixed in a selected position by means of a known tensioning device 14.
  • the telescopic feet 12 also have longitudinal slots 16 in two opposite walls, which in the exemplary embodiment are formed in the side walls of the telescopic feet.
  • the tensioning devices 14 are inserted through the longitudinal slots 16 and ensure that the telescopic feet 12 are securely fixed in a known manner in any extended or retracted position. Furthermore, in the longitudinal slots 16, the rungs 18 additionally required for climbing the ladder 18 when the telescopic feet 12 are extended.
  • FIG. 7 shows a detail of the rung guide in a longitudinal slot 16.
  • the rung 18 has a rectangular cross section. It preferably consists of an aluminum hollow profile. The narrow side of the profile is somewhat smaller than the width of the longitudinal slot 16, so that the rung 18 is easy to move in the longitudinal slot 16.
  • This bolt 76 can consist of a simple steel pin which is inserted through corresponding holes in the hollow profile.
  • rungs 18 are guided in the slots 16 of the telescopic feet 12 as are necessary to climb the extended ladder part.
  • these are three rungs.
  • the rungs are connected to one another with chains 78.
  • the chains 78 have a length that corresponds to the distance between the rungs.
  • the hook 82 is embedded in the lowest fixed rung 84 of the ladder.
  • FIG. 8 shows a step ladder, in which the rungs 18 are no longer fixed in a closely adjacent position by the chain 80. Rather, they are positioned by the chains 78 at a distance which corresponds to that of the fixed rungs. This makes the ladder easy to climb.
  • chains 78 and 82 which are used in the present exemplary embodiment, other connecting elements that can only be subjected to tension, such as e.g. Ropes, find application.
EP86101270A 1985-01-31 1986-01-31 Echelle double Withdrawn EP0189929A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3503269 1985-01-31
DE19853503269 DE3503269A1 (de) 1985-01-31 1985-01-31 Stehleiter

Publications (2)

Publication Number Publication Date
EP0189929A2 true EP0189929A2 (fr) 1986-08-06
EP0189929A3 EP0189929A3 (fr) 1987-05-06

Family

ID=6261301

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86101270A Withdrawn EP0189929A3 (fr) 1985-01-31 1986-01-31 Echelle double

Country Status (2)

Country Link
EP (1) EP0189929A3 (fr)
DE (1) DE3503269A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2190419A (en) * 1986-05-16 1987-11-18 Arthur Albert Gould Step ladders

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4406945A1 (de) * 1994-03-04 1995-11-09 Hymer Leichtmetallbau Klemmvorrichtung für reibschlüssige Verbindungen mit Anzeige
DE4418193A1 (de) * 1994-05-25 1995-11-30 Markwald Ute Klemmvorrichtung
DE102008037674A1 (de) 2008-08-14 2010-02-18 Walter, Georg, Dr. Vorrichtung zum Befestigen bzw. Aufstellen einer Leiter bei unwegsamer Umgebung

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH85059A (de) * 1919-10-11 1920-05-01 Rosenthal Max Leiter.
US1568201A (en) * 1922-10-05 1926-01-05 Charles V Allen Attachment for ladder legs
US2127884A (en) * 1937-12-11 1938-08-23 Overpeck Harvey Myers Ladder leveling attachment
US2503738A (en) * 1947-09-25 1950-04-11 Eastman Kodak Co Extension column lock
US2975857A (en) * 1955-11-17 1961-03-21 Suroff Hyman Extensible ladder constructions
US3933221A (en) * 1971-12-17 1976-01-20 Sorenson Virgil H Ladder adjusting and stabilizing apparatus
FR2547619A1 (fr) * 1983-06-14 1984-12-21 Promotion Equipements Speciaux Dispositif destine a compenser les differences de niveau d'un terrain en particulier pour les echelles

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1631513A (en) * 1926-06-17 1927-06-07 Berry Fred Forrest Extension-leg attachment for ladders
US2249304A (en) * 1940-10-08 1941-07-15 Wilson William Martin Ladder attachment
US3258085A (en) * 1964-03-09 1966-06-28 Mccarty Entpr Readily adjustable elongated support structure
FR1477451A (fr) * 1965-10-25 1967-04-21 Escabeau en tubes permettant tous travaux dans les parties hautes d'un escalier
DE1795362A1 (de) * 1968-09-19 1972-01-05 Boehringer Mannheim Gmbh Basische AEther und Verfahren zur Herstellung derselben
US4080080A (en) * 1977-02-16 1978-03-21 American Hospital Supply Corporation Adjustable leg assembly
GB2081793A (en) * 1980-08-08 1982-02-24 Treen Trevor Norris Improvements in or Relating to Ladders

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH85059A (de) * 1919-10-11 1920-05-01 Rosenthal Max Leiter.
US1568201A (en) * 1922-10-05 1926-01-05 Charles V Allen Attachment for ladder legs
US2127884A (en) * 1937-12-11 1938-08-23 Overpeck Harvey Myers Ladder leveling attachment
US2503738A (en) * 1947-09-25 1950-04-11 Eastman Kodak Co Extension column lock
US2975857A (en) * 1955-11-17 1961-03-21 Suroff Hyman Extensible ladder constructions
US3933221A (en) * 1971-12-17 1976-01-20 Sorenson Virgil H Ladder adjusting and stabilizing apparatus
FR2547619A1 (fr) * 1983-06-14 1984-12-21 Promotion Equipements Speciaux Dispositif destine a compenser les differences de niveau d'un terrain en particulier pour les echelles

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2190419A (en) * 1986-05-16 1987-11-18 Arthur Albert Gould Step ladders

Also Published As

Publication number Publication date
EP0189929A3 (fr) 1987-05-06
DE3503269A1 (de) 1986-08-07

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