EP0065492A2 - Faltbare Trittleiter - Google Patents

Faltbare Trittleiter Download PDF

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Publication number
EP0065492A2
EP0065492A2 EP82830081A EP82830081A EP0065492A2 EP 0065492 A2 EP0065492 A2 EP 0065492A2 EP 82830081 A EP82830081 A EP 82830081A EP 82830081 A EP82830081 A EP 82830081A EP 0065492 A2 EP0065492 A2 EP 0065492A2
Authority
EP
European Patent Office
Prior art keywords
steps
uprights
platform
frames
frame
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Withdrawn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
EP82830081A
Other languages
English (en)
French (fr)
Other versions
EP0065492A3 (de
Inventor
Antonio Rapisarda
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 EP0065492A2 publication Critical patent/EP0065492A2/de
Publication of EP0065492A3 publication Critical patent/EP0065492A3/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Withdrawn legal-status Critical Current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
    • E06C1/39—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 invention relates to a folding stepladder which comprises a front frame and a rear frame, the movements of spacing and reconciliation rotate a series of steps and an upper platform between a horizontal position and a retracted position.
  • a folding stool of this kind is already known which corresponds to the preamble of claim 1.
  • anterior In the following description and in the claims, the terms "anterior”, “posterior” and the like must be interpreted as referring to the positions of the two frames of the stepladder, the one of which having steps is conventionally called “anterior”, while the other frame is conventionally called “posterior”. It should also be understood that the terms “upper”, “lower”, “horizontal” and the like refer to the normal standing position of the stepladder.
  • a folding stepladder of the kind referred to is already known from document FR - A - 1 103 090.
  • the steps are pivotally mounted, by their central part, on the bars which connect the uprights of the front frame to one another.
  • a middle rod is hinged to the rear edges of the steps as well as to the upper platform.
  • This known arrangement has as a first drawback the fact that if the weight of the user is applied to the front parts of the steps, they can pivot towards the retracted position. This pivoting also causes the movement of the rod in the direction which corresponds to the bringing together of the two frames. Not only can the user then slide down the inclined steps and fall to the ground, but the entire stepladder can fold and tumble. All this can cause serious accidents.
  • stepladder Another drawback of the known stepladder is the danger in the event of a broken rod or one of its joints. In this case also, if the user steps on a step which is no longer retained in the horizontal position by the rod, this step rocks by sliding the user who in this case also may suffer a serious accident.
  • the present invention aims to provide a remedy to these drawbacks.
  • each step is supported, in its horizontal position, independently of the other steps.
  • the front part of the steps which is where the weight of the user is most often applied, is solidly supported by the bars.
  • the rear part of the steps is supported by the articulations to the uprights of the front frame and not by the rod, which according to the invention has no other function than that of allowing maneuvering in unison with the steps and the upper platform. If the rod or one of its joints breaks, this has no influence on the horizontal position of the steps resting on the bars and on their own joints.
  • the weight of the user on a step and in particular on the front part thereof can in no way produce, by means of the rod and the upper platform, the involuntary bringing together of the two frames.
  • a stepladder folding comprises an anterior frame 10 and a posterior frame 12.
  • the anterior frame 10 comprises a pair of uprights 14 interconnected by a series of equidistant horizontal bars, not visible in FIGS. 1 and 2, but which can be seen in the figures 3 to 5, where these bars are indicated by 16.
  • the series of bars also includes an upper bar 18, visible in FIG. 2.
  • the two uprights 14 are also connected to each other by an upper crosspiece 22 acting as a railing .
  • the rear frame 12 comprises a pair of uprights 20 connected to one another by a horizontal upper bar 24 and by a horizontal lower bar 26.
  • the two uprights 20 are further connected by a crosspiece 28.
  • the two uprights 14 are articulated by hinges 30 on the inner faces of the uprights 20, to allow the movement of the two frames 10 and 12 between the positions of FIGS. 1 and 2. Since the uprights 14 are located transversely inside the uprights 20, in the position of Figure 2 the front frame 10 is retracted into the rear frame 20, which frames it. Notches 32 and 34 are provided in the uprights 14 to receive the corresponding bars 24 and 26 in order to allow total retraction.
  • the front frame 10 is provided with a series of steps in the form of boards.
  • the top step or platform is indicated by 38, while the remaining steps are indicated by 40.
  • the steps 38, 40 are equidistant.
  • Walking upper 38 has a depth or tread greater than that of the steps 40 and constitutes a work platform for the user located at the top of the stepladder.
  • the upper platform 38 is articulated, by its front part, on the upper bar 18 of the front frame.
  • a middle part of the platform 38 is connected, by a double central connecting rod 42, to the upper bar 24 of the rear frame 12.
  • the arrangement is such that when the two frames 10, 12 are folded as in Figures 3 and 4, the upper platform 38 is folded up relative to its axis of articulation materialized by the bar 24.
  • the movement of spacing of the frames 10, 12 from the position of FIGS. 2 and 3 to that of FIGS. 1 and 5 produces, by means of the central rod 42, the folding back of the upper platform 38, from its storage position in FIGS. 2 and 3 up to the position of use of FIGS. 1 to 5.
  • the direction of this rearward folding is indicated by the arrow A in FIG. 4.
  • the upper platform 38 In its position of use, the upper platform 38 is supported horizontally on the upper bar 24 of the rear frame 12 and the articulation 44 of the central rod 42 to the platform 38 is substantially coplanar with the upper bars 18 and 24 of the two frames. This latter arrangement prevents the two frames from spreading beyond the position of use in FIGS. 1 and 5.
  • the upper platform 38 is further provided with a pair of yokes 46. In the position of the figures 1 and 5, the upper bar 24 of the rear frame 12 is engaged in these yokes 46 to constitute a guarantee against the spacing of the frames beyond the position of use.
  • Each of the steps 40 is articulated to the two uprights 14 of the front frame 10 around a respective horizontal axis, materialized by hinges 48. These hinges 48 are located towards the rear relative to the corresponding bars 16. In this way, the steps 40 can switch between a storage position ( Figures 2 and 3), in which they are folded upwards relative to their axis of articulation 48 and are retracted between the uprights 14, and a position d 'use ( Figures 1 and 5), wherein the steps 40 are supported on the bars 16 corresponding.
  • a rod 50 in the form of a flattened strip, which is interposed between the lateral edge of the steps 40 and the upright 14.
  • the rod 50 is articulated at each step by means of hinges. These hinges are indicated by 52, except that of the penultimate upper step, is indicated by 60.
  • the hinges 52, 60 define articulation axes located at the front relative to the axes or hinges 48.
  • the rod 50 constitutes a coupling member which serves to obtain the tilting in unison steps 40 between their two storage and use positions.
  • Notches 54 are provided in the posted edge laughing rod 50 to prevent it from interfering with the hinges 48, and other notches 56 are formed in the front edge of the rod to prevent it from interfering with bars 16.
  • a helical tension spring 58 hooked to the upright 14 and tending to return the rod downwards, that is to say to recall the steps 40 at the position of use of Figures 1 and 5.
  • the upper end of the coupling rod 50 is articulated at 60 at one end of a lateral connecting rod 62.
  • the other end of the connecting rod is articulated at 64 at the rear part of the upper platform 38.
  • connection systems described above, between the steps 38, 40 on the one hand, and between the step 38 and the two frames 10 and 12, on the other hand, in order to obtain the movement of the steps between their two positions the user must do nothing other than move aside or bring the two frames 10 and 12 closer together.

Landscapes

  • Ladders (AREA)
EP82830081A 1981-04-30 1982-04-02 Faltbare Trittleiter Withdrawn EP0065492A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT5318881U 1981-04-30
IT5318881U IT8153188V0 (it) 1981-04-30 1981-04-30 Scala a libretto

Publications (2)

Publication Number Publication Date
EP0065492A2 true EP0065492A2 (de) 1982-11-24
EP0065492A3 EP0065492A3 (de) 1984-04-11

Family

ID=11280674

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82830081A Withdrawn EP0065492A3 (de) 1981-04-30 1982-04-02 Faltbare Trittleiter

Country Status (2)

Country Link
EP (1) EP0065492A3 (de)
IT (1) IT8153188V0 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2175948A (en) * 1985-06-04 1986-12-10 Brian Weston Step ladder
WO1999047783A1 (en) * 1998-03-19 1999-09-23 R.M.M. Corp., Inc. Ladder with handle and ledge
EP1679423A1 (de) * 2004-12-24 2006-07-12 Hymer-Leichtmetallbau GmbH & Co. KG Steh-Leiter mit schwenkbarer Sicherheitsbrücke
WO2010102022A1 (en) * 2009-03-03 2010-09-10 Wing Enterprises, Incorporated Stepladders and related methods

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB183686A (en) * 1921-07-05 1922-08-03 Octavius John Williams Improvements in and relating to step-ladders
DE535785C (de) * 1931-10-16 Ernst Plenter Zusammenlegbare Stehleiter mit durch gemeinsame Fuehrungsleisten in eine Ebene klappbaren Stufen
US2509206A (en) * 1946-03-20 1950-05-30 Vincent J Buckner Stepladder
FR1093081A (fr) * 1954-11-22 1955-04-29 Fotim Escabeau avec marches pliantes
FR1103090A (fr) * 1954-04-15 1955-10-28 Escabeau métallique se pliant automatiquement
FR1383452A (fr) * 1964-02-25 1964-12-24 Loh Kg Hailo Werk Echelle double à marches
FR2036361A5 (de) * 1969-03-17 1970-12-24 Cordel & Cie
DE2741091A1 (de) * 1977-09-13 1979-03-22 Jep Reuter Ing Grad Krag Klapptreppe

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE535785C (de) * 1931-10-16 Ernst Plenter Zusammenlegbare Stehleiter mit durch gemeinsame Fuehrungsleisten in eine Ebene klappbaren Stufen
GB183686A (en) * 1921-07-05 1922-08-03 Octavius John Williams Improvements in and relating to step-ladders
US2509206A (en) * 1946-03-20 1950-05-30 Vincent J Buckner Stepladder
FR1103090A (fr) * 1954-04-15 1955-10-28 Escabeau métallique se pliant automatiquement
FR1093081A (fr) * 1954-11-22 1955-04-29 Fotim Escabeau avec marches pliantes
FR1383452A (fr) * 1964-02-25 1964-12-24 Loh Kg Hailo Werk Echelle double à marches
FR2036361A5 (de) * 1969-03-17 1970-12-24 Cordel & Cie
DE2741091A1 (de) * 1977-09-13 1979-03-22 Jep Reuter Ing Grad Krag Klapptreppe

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2175948A (en) * 1985-06-04 1986-12-10 Brian Weston Step ladder
WO1999047783A1 (en) * 1998-03-19 1999-09-23 R.M.M. Corp., Inc. Ladder with handle and ledge
EP1679423A1 (de) * 2004-12-24 2006-07-12 Hymer-Leichtmetallbau GmbH & Co. KG Steh-Leiter mit schwenkbarer Sicherheitsbrücke
WO2010102022A1 (en) * 2009-03-03 2010-09-10 Wing Enterprises, Incorporated Stepladders and related methods
US8701831B2 (en) 2009-03-03 2014-04-22 Wing Enterprises, Inc. Stepladders and related methods
US9920572B2 (en) 2009-03-03 2018-03-20 Wing Enterprises, Incorporated Stepladders and related methods

Also Published As

Publication number Publication date
IT8153188V0 (it) 1981-04-30
EP0065492A3 (de) 1984-04-11

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