EP1344892A1 - Zusammenklappbare Trittleiter - Google Patents

Zusammenklappbare Trittleiter Download PDF

Info

Publication number
EP1344892A1
EP1344892A1 EP02425139A EP02425139A EP1344892A1 EP 1344892 A1 EP1344892 A1 EP 1344892A1 EP 02425139 A EP02425139 A EP 02425139A EP 02425139 A EP02425139 A EP 02425139A EP 1344892 A1 EP1344892 A1 EP 1344892A1
Authority
EP
European Patent Office
Prior art keywords
step stool
frame
forks
pair
folding step
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
EP02425139A
Other languages
English (en)
French (fr)
Other versions
EP1344892B1 (de
Inventor
Davide Coggiola
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.)
Framar SpA
Original Assignee
Framar SpA
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 Framar SpA filed Critical Framar SpA
Priority to EP02425139A priority Critical patent/EP1344892B1/de
Priority to AT02425139T priority patent/ATE251709T1/de
Priority to DE60200052T priority patent/DE60200052T2/de
Priority to ES02425139T priority patent/ES2208628T3/es
Publication of EP1344892A1 publication Critical patent/EP1344892A1/de
Application granted granted Critical
Publication of EP1344892B1 publication Critical patent/EP1344892B1/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
    • E06C1/39—Ladders having platforms; Ladders changeable into platforms
    • E06C1/393—Ladders having platforms foldable with the ladder
    • 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
    • E06C1/387—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 having tip-up steps

Definitions

  • the present invention refers to folding step stools.
  • This type of step stool generally comprises two parallel, tubular, rectangular and load bearing frames having circular or polygonal cross section, hinged to each other at their upper ends that can be opened with a calliper-like movement, one of said two frames being provided with a series of hinged steps.
  • step stools One of the problems connected with said type of step stools is due to the fact that, once they have been opened, they must prove to be safe and stable for the user, so as to prevent the risk of an accidental closure.
  • step stool can be equipped with any number of steps different from the number of steps shown in the cited example.
  • a foldable step stool formed by a pair of front and rear frames, respectively indicated with 1 and 3, to which a pair of lower and upper steps, respectively 4a and 4b, is hinged.
  • the front frame 1 has been defined as the frame facing the side from which the step stool is used and the other frame 3 as the rear frame.
  • Said frames 1 and 3 are respectively provided with lower support feet 11 and 9.
  • Each step 4a,4b is constituted by a metal plane having raised ribs or an embedded plastic mat in order to assure an anti-slip function, and is perimetrically bounded by a folded edge in order to assure higher sturdiness and safety for supporting a user's foot.
  • Said frames 1 and 3 are hinged to each other so that the step stool can assume a closed (or rest) configuration and an open (or operative) configuration.
  • the link between said front frame 1 and said rear frame 3 is obtained by means of a first pair of upper stays 5, having a first end hinged to the rear frame 3 in 15 and a second end hinged to the front frame 1 in 17, and a second pair of lower stays 7, having a first end hinged to the rear frame 3 in 19 and a second end rearly hinged to the flank of the lower step 4a in 21, said flank of the lower step 4a being frontally hinged to the front frame 1 in 25.
  • the upper step 4b results to be frontally hinged to the front frame 1 in 23 and rearly to the rear frame 3 in correspondence with the hinge point 19 of said second pair of stays 7.
  • the lower step 4a results to be frontally hinged to the front frame 1 in 25 and rearly to the lower stays 7 in 21.
  • Said frames 1 and 3 are preferably constituted by metallic tubular elements having circular or polygonal cross section, also having different cross sectional areas, for instance respectively the one bigger than the other, wherein the front frame 1 has the shape of an "upside-down U” and the rear frame 3 is "U"-shaped.
  • said frames can be painted or realised in a material that does not need to be painted, like for instance aluminium.
  • the front frame 1 results to be bent towards the rear frame 3 until it forms the inclined and parallel arms 1a that, together with the linking arm 1b, constitute a loop projecting towards the back of the step stool, in order to advantageously realise, when the step stool is open that is to say in its usage position, a useful safety rim, leaving completely free and practicable the surface of the tread plane of the topmost step 4b.
  • the front frame 1 results to be bent towards the rear frame 3 until it forms the inclined and parallel arms 1'a that, together with the linking arm 1'b, constitute a loop projecting towards the back of the step stool, in order to advantageously realise, when the step stool is open that is to say in its usage position, a useful safety handrail; in fact, said arms 1'a and 1'b extend vertically, in correspondence with the hinge points of the upper stays 5, towards the rear frame 3 for such a length that the user can grasp the linking arm 1'b with his/her hand. Also in this second embodiment of the present invention the surface of the tread plane of the topmost step 4b is left completely free and practicable.
  • each of the upper ends of the rear frame 3 is provided with a fork 13, preferably in rigid or semi-rigid plastic, conveniently shaped for assuring the locking of the step stool as a result of the insertion realised by pressing said fork 13 into the parallel arms 1a or 1'a of said loop formed by the front frame 1 beyond the topmost step.
  • the locking system comprising two forks 13 and realised in this way is such to prevent an accidental closure of the step stool, while preserving the characteristics of easy handiness, minimal dimensions, lightness, simplicity of construction and inexpensiveness of the step stool itself.
  • a fork 13, shown in detail in a lateral view of Figure 2, is hooked to the part 1a or 1'a of the frame 1 in its usage position, that is to say when the step stool is open.
  • Said fork 13 comprises a hooking portion 13a, a fixing portion 13c inserted into the end of the tube of the rear frame 3 and a linking portion 13d linking the two above mentioned portions.
  • the hooking portion 13a of the fork 13 is suitable for insertion into the part 1a or 1'a of the frame 1 and has the form of two parallel elastic fins having a trapezoidal shape with rounded corners.
  • Figure 3 is a longitudinal section of the fork 13 pointing out the part suitable for the hooking, comprising the fins 13a and the cylindrical portion 13c arranged for fixing the fork 13 to the rear frame 3 by means of insertion realised by pressing into the corresponding tube of said rear frame 3.
  • Said cylindrical portion 13c is locked in 15 inside the rear frame 3 thanks to a rivet crossing the tube 3 and the cylindrical portion 13c thanks to the bore 13b there provided and to which the upper stay 5 is hinged.
  • said fixing portion 13 comprises a series of parallel circular ribs 13f that, interfering with the internal wall of the tubular frame 3, assure that the forks 13 engage stably with respect to said frame 3.
  • the linking portion 13d comprises an inclined wall 13e linked to the edge of the cylindrical portion 13c and laterally to the fins 13a.
  • the fork is realised by means of known molding techniques.
  • step stool according to the present invention has been described as a two-steps foldable stool, it is clear that in any case the invention may be realised with foldable step stools having any number of steps.

Landscapes

  • Ladders (AREA)
  • Passenger Equipment (AREA)
  • Farming Of Fish And Shellfish (AREA)
  • Emergency Lowering Means (AREA)
EP02425139A 2002-03-11 2002-03-11 Zusammenklappbare Trittleiter Expired - Lifetime EP1344892B1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP02425139A EP1344892B1 (de) 2002-03-11 2002-03-11 Zusammenklappbare Trittleiter
AT02425139T ATE251709T1 (de) 2002-03-11 2002-03-11 Zusammenklappbare trittleiter
DE60200052T DE60200052T2 (de) 2002-03-11 2002-03-11 Zusammenklappbare Trittleiter
ES02425139T ES2208628T3 (es) 2002-03-11 2002-03-11 Escalera plegable.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP02425139A EP1344892B1 (de) 2002-03-11 2002-03-11 Zusammenklappbare Trittleiter

Publications (2)

Publication Number Publication Date
EP1344892A1 true EP1344892A1 (de) 2003-09-17
EP1344892B1 EP1344892B1 (de) 2003-10-08

Family

ID=27763485

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02425139A Expired - Lifetime EP1344892B1 (de) 2002-03-11 2002-03-11 Zusammenklappbare Trittleiter

Country Status (4)

Country Link
EP (1) EP1344892B1 (de)
AT (1) ATE251709T1 (de)
DE (1) DE60200052T2 (de)
ES (1) ES2208628T3 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2998329A1 (fr) * 2012-11-22 2014-05-23 Roll S Rapides Marchepied de travail pliant

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1257779A (fr) * 1960-02-24 1961-04-07 Escabeau pliant utilisable comme siège
GB1295004A (de) * 1970-06-26 1972-11-01
GB1547243A (en) * 1975-07-19 1979-06-06 Hunter Douglas Ind Bv Dual purpose stepladder and domestic stool
EP0961006A1 (de) 1998-05-27 1999-12-01 Framar S.p.A. Tragbare Trittleiter

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1257779A (fr) * 1960-02-24 1961-04-07 Escabeau pliant utilisable comme siège
GB1295004A (de) * 1970-06-26 1972-11-01
GB1547243A (en) * 1975-07-19 1979-06-06 Hunter Douglas Ind Bv Dual purpose stepladder and domestic stool
EP0961006A1 (de) 1998-05-27 1999-12-01 Framar S.p.A. Tragbare Trittleiter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2998329A1 (fr) * 2012-11-22 2014-05-23 Roll S Rapides Marchepied de travail pliant

Also Published As

Publication number Publication date
DE60200052D1 (de) 2003-11-27
ATE251709T1 (de) 2003-10-15
DE60200052T2 (de) 2004-07-29
ES2208628T3 (es) 2004-06-16
EP1344892B1 (de) 2003-10-08

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