EP0107992A2 - Zusammenklappbare Trittleiter - Google Patents

Zusammenklappbare Trittleiter Download PDF

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Publication number
EP0107992A2
EP0107992A2 EP83401958A EP83401958A EP0107992A2 EP 0107992 A2 EP0107992 A2 EP 0107992A2 EP 83401958 A EP83401958 A EP 83401958A EP 83401958 A EP83401958 A EP 83401958A EP 0107992 A2 EP0107992 A2 EP 0107992A2
Authority
EP
European Patent Office
Prior art keywords
uprights
upright
main
auxiliary
branches
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Withdrawn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
EP83401958A
Other languages
English (en)
French (fr)
Other versions
EP0107992A3 (de
Inventor
Gérard Stoltz
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
Publication of EP0107992A2 publication Critical patent/EP0107992A2/de
Publication of EP0107992A3 publication Critical patent/EP0107992A3/de
Withdrawn legal-status Critical Current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
    • 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
    • E06C1/3835—Foldable ladders in which the longitudinal members are brought together on folding having collapsible steps comprising a hinge in their central part
    • 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

Definitions

  • the present invention relates to a foldable ladder.
  • Foldable stepladder ladders are known comprising relatively complicated means of placing them in service and storage positions, the maneuver of which is particularly awkward.
  • the main object of the present invention is to remedy these drawbacks.
  • the elastic member consists of a spring steel wire compass connecting each main upright to each auxiliary upright, said compass being fixed on said uprights at the ends of its two branches and having in its part central a deformable loop.
  • This arrangement according to the invention allows easy and automatic deployment of the stepladder ladder for putting it into service and keeping it in the storage position with a small footprint.
  • a step ladder which comprises two main uprights 1 and 2, a central upright 3 and steps in two parts 4 and 5 which are pivotally mounted, d on the one hand, on the main uprights 1 and 2 around axes 6, 7 respectively perpendicular to the plane of the main uprights 1 and 2 and in fact generally horizontal, on the other hand, on the central upright 3 around parallel axes 8 to said axes 6 and 7.
  • a compass ( Figures 3 and 8) provided between the auxiliary uprights 11, 12 has two branches 25, 26 hinged together around an axis 27 and articulated respectively on the auxiliary uprights 11,12 around axes 28, 29.
  • On either side of the branches 25, 26 ( Figure 8) are arranged two washers 30, 31 engaged on the axis 27, said washers having dimensions greater than the width of the branches 25, 26, in order to extend beyond the edges of said branches and to prevent the user's fingers from coming into contact with the joint.
  • the device comprises between the main upright and the auxiliary upright an elastic member which tends to separate the auxiliary uprights from the main uprights.
  • the hinge pin 10 of an auxiliary upright on a main upright consists of a screw, the head 10a of which rests against the wall of the upright 12, said screw being provided with a nut lOb in abutment by means of an elastic washer 32 against the wall of the main upright 2.
  • This arrangement allows, due to the presence of the elastic washer 32 and holes 33 and 34 in the uprights of larger diameter than the section of the rod of the screw 10, to obtain an inclination of its axis and, consequently, of the auxiliary upright 12.
  • the latter has at its upper part engaged on the screw 10 , a folded part 58.
  • the elastic member ( Figures 10, 11) which tends to cause the opening of the main uprights 1, 2 and auxiliaries 11, 12 consists of a compass 50 made of spring steel wire connecting each main upright 1, 2 to each auxiliary amount 11, 12.
  • the compass 50 has two branches 51, 52 which are respectively fixed by means of bolts 53, 54 on the main post 2 and on the auxiliary post 12, said compass having between the two branches in its central part a loop 55 allowing the compass to get deform to occupy an open position shown in FIG. 10 and a closed position of the uprights shown in FIG. 11.
  • the branches 51 and 52 are folded at right angles to form substantially right angles having vertices 56, 57.
  • the angled branches 51, 52 are engaged one in the other so that they abut one against the other by the vertices 56, 57 of the angles when the ladder-stepladder is in the position of opening (figure 10).
  • a locking means 38 (FIGS. 1, 4, 5, 6) which consists of two blades 38a, 38b, fixed respectively on the uprights 2 and 12 and each having a folded part making a determined angle with the wall of the uprights so as to constitute two lugs 39, 40.
  • the lugs 39, 40 being arranged so on the uprights that, when the upright 12 comes into look of the upright 2, the two lugs 39, 40 being arranged so on the uprights that, when the upright 12 comes opposite the upright 2, the two lugs 39, 40 abut one against the other in position lock.
  • the device according to the invention operates in the following manner.
  • a reinforcing arm 41 (FIG. 3) which is articulated at one of its ends around an axis 42 fixed on the main upright 1, the other end of the arm 41 comprising a hook 41a, capable of being engaged on a stud 43 extending one of the axes 8.
  • U-shaped profiles 44 and 45 are pivotally mounted around axes 46, 47 so as, on the one hand, to reconstitute an upper gutter (FIG. 9) able to support small objects and / or tools, on the other hand, to retract along said main uprights 1, and 2, during the folding of the stepladder.
  • the U-shaped profiles 44 and 45 have end tongues 48 and 49 which block said profiles 44, 45 in the extension of one another in order to constitute a gutter.

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  • Ladders (AREA)
EP83401958A 1982-10-29 1983-10-07 Zusammenklappbare Trittleiter Withdrawn EP0107992A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8218264 1982-10-29
FR8218264A FR2535387B1 (fr) 1982-10-29 1982-10-29 Echelle-escabeau repliable

Publications (2)

Publication Number Publication Date
EP0107992A2 true EP0107992A2 (de) 1984-05-09
EP0107992A3 EP0107992A3 (de) 1985-09-25

Family

ID=9278788

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83401958A Withdrawn EP0107992A3 (de) 1982-10-29 1983-10-07 Zusammenklappbare Trittleiter

Country Status (2)

Country Link
EP (1) EP0107992A3 (de)
FR (1) FR2535387B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5726686A (en) * 1987-10-28 1998-03-10 Canon Kabushiki Kaisha Coordinates input apparatus
KR20020074359A (ko) * 2001-03-20 2002-09-30 이광용 사다리

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2700350C1 (ru) * 2019-03-12 2019-09-16 Николай Петрович Дядченко Стремянка

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1783686A (en) * 1928-03-17 1930-12-02 Samuel F Williams Folding ladder
CH295618A (de) * 1951-01-17 1954-01-15 Riemensperger Eugen Bockleiter.
FR1247207A (fr) * 1959-10-21 1960-11-25 échelle à éléments repliables les uns sur les autres
GB1368001A (en) * 1972-05-12 1974-09-25 Henderson D S Ladders

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1783686A (en) * 1928-03-17 1930-12-02 Samuel F Williams Folding ladder
CH295618A (de) * 1951-01-17 1954-01-15 Riemensperger Eugen Bockleiter.
FR1247207A (fr) * 1959-10-21 1960-11-25 échelle à éléments repliables les uns sur les autres
GB1368001A (en) * 1972-05-12 1974-09-25 Henderson D S Ladders

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5726686A (en) * 1987-10-28 1998-03-10 Canon Kabushiki Kaisha Coordinates input apparatus
KR20020074359A (ko) * 2001-03-20 2002-09-30 이광용 사다리

Also Published As

Publication number Publication date
FR2535387B1 (fr) 1985-06-21
FR2535387A1 (fr) 1984-05-04
EP0107992A3 (de) 1985-09-25

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Effective date: 19860526