EP0310884B1 - Zusammenfaltbare Steigleiter - Google Patents

Zusammenfaltbare Steigleiter Download PDF

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Publication number
EP0310884B1
EP0310884B1 EP88115651A EP88115651A EP0310884B1 EP 0310884 B1 EP0310884 B1 EP 0310884B1 EP 88115651 A EP88115651 A EP 88115651A EP 88115651 A EP88115651 A EP 88115651A EP 0310884 B1 EP0310884 B1 EP 0310884B1
Authority
EP
European Patent Office
Prior art keywords
rung
rungs
ladder
foldable
distance
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 - Lifetime
Application number
EP88115651A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0310884A1 (de
Inventor
Dieter Collet
Emil Freiwald
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 AT88115651T priority Critical patent/ATE75293T1/de
Publication of EP0310884A1 publication Critical patent/EP0310884A1/de
Application granted granted Critical
Publication of EP0310884B1 publication Critical patent/EP0310884B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • E06C1/38—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

Definitions

  • the invention relates to a foldable ladder with foldable rungs, which have a 90 ° pivot point in the central region, the rungs also being rotatably installed in the risers by 90 ° via a rung end axle joint.
  • German Offenlegungsschriften 29 23 397 and 33 20 519 are to be mentioned.
  • DE-OS 29 23 397 relates to a folding ladder with two spars, to which rungs each consisting of two directly articulated parts are articulated, the different pivot axes being parallel to one another and perpendicular to the plane of the ladder, with a resistant, preferably tubular rod for Connection of the articulation points of the rung parts with each other, and with a support frame arranged under the bottom rung of the ladder, the support legs of which have a greater length than the rung parts and are articulated on the one hand on the spars and on the other hand, the tip of the support frame being arranged over the ends of the support legs is and forms a support for the lower end of the resilient rod when the conductor is fully spread apart, the pivot axes of the support legs of the support frame being arranged on the spars at fixed locations with respect to the spars, and that the pivot axis in the region I the articulation of the two support legs to one another is movable relative to the resistant rod, the stop surface formed by the tip of the support frame itself being held
  • DE-OS 33 20 519 describes a folding ladder in which the ladder rungs are folded in the middle and are hinged to the ladder stiles. There is a central locking linkage that is not a pushing linkage and that is not slidably arranged in the spar.
  • the present invention has for its object to provide such a folding ladder that allows a completely uniform buckling movement of the rungs, but at the same time there is no impairment of the climbing process.
  • a spacer roller for supporting the elongated rungs can be installed in the central joint, as in the end joints, whereby the step web can be formed in the middle of the rung from both sides so that the step webs abut each other and the pressure point is on the rung ends is supported.
  • the risers are preferably U-shaped and the material thickness in connection with the likewise U-shaped crossbars is preferably held so that the overall stability corresponds to the standards on which ladders are based, the accuracy of safety being ensured by suitable fitting pieces.
  • One of the main functions of the folding ladder according to the invention is to be easily transportable as a ladder on caravans, on the boat, in the house, since the folding ladder has the shape of a "rod" with a rectangular cross-section when folded.
  • An aluminum alloy is preferably to be provided as material, the rivets are preferably made of chromium-nickel steel. Furthermore, the aluminum brings the desired corrosion resistance and the desired weight saving.
  • Figure 1 is a foldable ladder with foldable rung bars 3, each with a central joint and built in the riser rung end axis joints 6; 9 shown, the foldability is guaranteed.
  • the ratchet points 7, 8 are tied to the synchronism of the rungs movement from rungs to rungs 3 by a push rod 2 on the right and left, whereby the axis intersection with the push rod rivet must be precisely positioned.
  • Figure 1 is the ladder in the working position with extended rung position 18 in the 90 ° pivot point 4 in the central region of the foldable rungs by means of the spacer rollers 5 with the step butt edge 14 to the pressure point in the end position in cooperation with the rung end axis joints installed in the spars at the end of the rungs 9 installed at anchor point 7 firmly anchored.
  • the ladder can be seen in the rest position as a space-saving, cubically acting rod 17, here 20 shows a locking lock or lockability.
  • the push rod is shown in FIG. 2, and the rivetability from rung web to rung web is shown at 16.
  • the position of use of the foldable ladder is anchored in the area of the bottom rung with brackets 21 by means of the middle bracket 27, 23 being a support for the linkage in the base of the ladder, which engages in support, whereby the counter-strut makes the ladder stable.
  • the center pivot point of the rung is stabilized by means of a spacer roller 5 which, by means of the locking core pin 30, absorbs all rotary movements in a free-standing manner up to the end point position 28, the central bracket 27 designed as a cross bolt ensuring the final engagement.
  • Figure 7 shows the almost cubic closed section viewed from above. It is the compact part with the spacer roller 5, which serves for stabilization; 25 denotes the movable push rods which make it possible to slide into the counter spars by means of the spacers; the center point of the round is the final locking, as are the U-spars of FIG. 6 in FIG. 7 that are pushed against each other.
  • Figures 8-17 show further exemplary embodiments of the subject matter of the invention.
  • the risers are at 31, the stepping rungs are foldable at 32, the push rods are offset at 33, and at 34 they are precise from rung web to rung web fixed joint rivets for the uniform pushing movement of the rungs, with 35 the spacer rings adapted to the push rod are attached to the axis connecting 31 and 32 39 as well as 36 spacer rings for the rung offset, under 37 is a load-bearing spacer roller, with 38 is the rungs connecting axis inserted, under 39 the rungs with the risers are anchored by means of axis 9 with the spacer rollers in a pre-planned, surprising position, at 40 the connecting rods connected to the step bars guarantee the synchronism in the up and down movement via the intended 90 ° pivot point, whereby At the final closing point, briefly immerse the push rods on both sides of the riser on both sides, as shown in Figure 10 at 33, under 41 there is a lock on the straight rung, which also shows the stabilization of the rod
  • Figure 18 and Figure 19 show the bracket linkage 21 in a further preferred embodiment.
  • the clamping linkage 21 has at its ends arc-shaped claws 50 which grip around the axle roller 5 in the unfolded state.
  • the latching lugs 51 of each clamping rod part 21 engage in the recess 22 of the axle roller 5.
  • the axle roller 5 is guided so that the recess 52 is exactly over the locking lugs 51 in the unfolded state.
  • the size of the recess 52 is smaller than the outer dimensions of the latching lugs 51, so that when the conductors are folded out, the latching lugs 51 must be pressed into the recess 42 and thus a firm connection is created.

Landscapes

  • Ladders (AREA)
  • Steps, Ramps, And Handrails (AREA)
EP88115651A 1987-10-06 1988-09-23 Zusammenfaltbare Steigleiter Expired - Lifetime EP0310884B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88115651T ATE75293T1 (de) 1987-10-06 1988-09-23 Zusammenfaltbare steigleiter.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3733702 1987-10-06
DE19873733702 DE3733702A1 (de) 1987-10-06 1987-10-06 Zusammenfaltbare steigleiter

Publications (2)

Publication Number Publication Date
EP0310884A1 EP0310884A1 (de) 1989-04-12
EP0310884B1 true EP0310884B1 (de) 1992-04-22

Family

ID=6337688

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88115651A Expired - Lifetime EP0310884B1 (de) 1987-10-06 1988-09-23 Zusammenfaltbare Steigleiter

Country Status (9)

Country Link
US (1) US4842099A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
EP (1) EP0310884B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPH01239287A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
KR (1) KR890006949A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AT (1) ATE75293T1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AU (1) AU615480B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CA (1) CA1296688C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (2) DE3733702A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
ES (1) ES2032918T3 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5158151A (en) * 1992-01-21 1992-10-27 Chang Wan Li Bidirectionally foldable step ladder
US5195610A (en) * 1992-05-04 1993-03-23 Wan Li Chang Bidirectionally foldable step ladder
CH686317A5 (de) * 1992-05-08 1996-02-29 Wan Li Chang Verriegelungsvorrichtung fuer bidirektional zusammenlegbare Trittleitern.
AU667980B2 (en) * 1992-11-26 1996-04-18 Michael Mulawa Toy surfing device
DE9406506U1 (de) * 1994-04-19 1995-08-17 Kunz, Markus, 66646 Marpingen Treppe, insbesondere Dachboden-Treppe
US6536558B2 (en) 2001-02-16 2003-03-25 Harold E. Price Folding ladder
FR2928393B1 (fr) * 2008-03-07 2015-07-24 Larbaletier Plate-forme d'observation pliable et procede de montage
CN112572562B (zh) * 2020-12-05 2021-11-23 乐山职业技术学院 一种书籍转运器

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US610284A (en) * 1898-09-06 schubert
US958732A (en) * 1908-03-06 1910-05-24 Dennis Novelty Ladder Company Ladder.
GB191010778A (en) * 1910-05-02 1910-09-15 Flora Williams Smith Improvements in Foldable Ladders.
US1371125A (en) * 1918-01-05 1921-03-08 Jr Herman Frank Speckman Folding ladder
US2670120A (en) * 1949-05-16 1954-02-23 Sanguineti Emanuele Collapsible ladder, double ladder, and stepladder
FR1139461A (fr) * 1955-12-02 1957-07-01 échelle articulée
US2981364A (en) * 1959-07-13 1961-04-25 Webber Jack Folding ladder
FR1247207A (fr) * 1959-10-21 1960-11-25 échelle à éléments repliables les uns sur les autres
US3084760A (en) * 1960-01-18 1963-04-09 Lamberti Battista Stepladder with folding elements
AT239066B (de) * 1963-05-16 1965-03-10 Johann Tretina Als Anlege- oder Stehleiter verwendbare Leiter
FR1403008A (fr) * 1964-04-27 1965-06-18 Perfectionnements aux échelles et escaliers portatifs analogues
FR2428138A1 (fr) * 1978-06-09 1980-01-04 Stoltz Gerard Echelle pliante
DE3320519A1 (de) * 1983-06-07 1984-12-13 Karl 4400 Münster Kemper Faltleiter
US4560030A (en) * 1984-05-04 1985-12-24 Metarplastic S.P.A. Folding ladder
IT8552842U1 (it) * 1985-01-14 1986-07-14 Pro Cord Srl Scala a pioli pieghevole a tre montanti

Also Published As

Publication number Publication date
DE3733702A1 (de) 1989-05-03
US4842099A (en) 1989-06-27
AU2340688A (en) 1989-04-06
ATE75293T1 (de) 1992-05-15
KR890006949A (ko) 1989-06-17
JPH01239287A (ja) 1989-09-25
AU615480B2 (en) 1991-10-03
ES2032918T3 (es) 1993-03-01
EP0310884A1 (de) 1989-04-12
DE3733702C2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1990-10-31
CA1296688C (en) 1992-03-03
DE3870386D1 (de) 1992-05-27

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