EP2526239B1 - Escalier escamotable encastré dans un cadre - Google Patents

Escalier escamotable encastré dans un cadre Download PDF

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Publication number
EP2526239B1
EP2526239B1 EP11706958.3A EP11706958A EP2526239B1 EP 2526239 B1 EP2526239 B1 EP 2526239B1 EP 11706958 A EP11706958 A EP 11706958A EP 2526239 B1 EP2526239 B1 EP 2526239B1
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EP
European Patent Office
Prior art keywords
stairs
uppermost
segment
frame
movable 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.)
Active
Application number
EP11706958.3A
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German (de)
English (en)
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EP2526239A1 (fr
Inventor
Boguslaw Krasinski
Bernard Kaczmarski
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.)
Fakro PP Sp zoo
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Fakro PP Sp zoo
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Publication of EP2526239A1 publication Critical patent/EP2526239A1/fr
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
    • E04F11/02—Stairways; Layouts thereof
    • E04F11/04—Movable stairways, e.g. of loft ladders which may or may not be concealable or extensible
    • E04F11/06—Movable stairways, e.g. of loft ladders which may or may not be concealable or extensible collapsible, e.g. folding, telescopic
    • E04F11/062—Movable stairways, e.g. of loft ladders which may or may not be concealable or extensible collapsible, e.g. folding, telescopic folding
    • E04F11/064—Movable stairways, e.g. of loft ladders which may or may not be concealable or extensible collapsible, e.g. folding, telescopic folding with stringers overlapping when folded

Definitions

  • the present invention relates to foldable stairs, in particular a ladder-like stairs embedded in a substantially horizontal frame mounted in a ceiling, and in particular in a deep frame apt to a thick ceiling such as ceiling provided with thermal insulation. Stairs of this kind are used mainly as attic entrances.
  • Patent specification GB 2 319 051 discloses a folding attic stairway comprising three stairway portions connected by hinges, where the upper stairway portion is mounted on the inner stairway carrying frame which is pivotally mounted by a hinge on the outer frame for mounting in a ceiling open. The uppermost step of these stairs is the uppermost step of the upper stairway portion mounted to the inner stairway carrying frame. Also the Polish patent specification PL 199927 B1 discloses foldable stairs having the uppermost step fixed to the uppermost stairs segment.
  • CH 259760 discloses a foldable stairs according to the preamble of claim 1.
  • the invention provides foldable stairs embedded in a frame, in particular in a deep frame having increased wall height, comprising stairs segments movable with relation to each other, wherein the uppermost stairs segment is rotationally connected with the frame, which are provided with a movable step pivotally connected to the internal surface of the wall of the frame.
  • the uppermost stairs segment is attached to the cover that closes said frame at the bottom thereof in the stairs closed state and is connected by means of a hinge mechanism with the frame and the movable step is supported by at least one supporting element connected to the cover.
  • the geometrical axis of the stringers of the uppermost segment of the stairs unfolded for use thereof crosses the top surface of the stair tread of the movable step in the proximity of the centre of the tread width.
  • the movable step can be positioned in such a manner that the distance between the tread of the movable step and the tread of the uppermost step of the uppermost stairs segment substantially corresponds to the step pitch of the stairs.
  • the stairs can also be provided with a mechanism, preferably a spring mechanism, that supports lifting up of folded stairs to the stairs closed state and at least partially counterbalances the weight of the stairs during opening thereof.
  • the stairs are also provided with tie rod arrangement that restricts the opening limits of the stairs.
  • said supporting element of the movable step is the uppermost stairs segment and the movable step is supported by hinged connectors coupling the uppermost stairs segment, preferably stringers of this segment, with the movable step.
  • the hinged connectors are substantially aligned with the stringers of the uppermost stairs segment.
  • the geometrical axis of the stringers of the uppermost segment of the stairs crosses the top surface of the tread of the movable step in the proximity of the centre of its width so that the pressure on this step is transferred mainly on the uppermost stairs segment and only to a limited extent through the joint of this step on the frame mounted in a ceiling.
  • said supporting element of the movable step is the uppermost stairs segment and the movable step is provided with supporting legs and in the opened state of the stairs the supporting legs are substantially aligned with the stringers of the uppermost segment of the stairs and abut the frontal top surfaces of the stringers.
  • the opened state of the stairs unfolded for use the geometrical axis of the stringers of the uppermost segment of the stairs crosses the top surface of the tread of the movable step in the proximity of the centre of the width of the tread which has the same advantageous effect of transferring pressure as in the embodiment above.
  • the tread of the movable step adheres to the frame wall from inside and the supporting legs have no contact with the uppermost segment of the stairs.
  • said supporting element of the movable step is at least one bracket attached to the cover connected by means of a hinge mechanism with the frame.
  • the movable step is supported by hinged connectors coupling the movable step with this bracket or brackets.
  • the hinged connectors are substantially aligned with the stringers of the uppermost stairs segment in the opened state of the stairs.
  • the width of the tread of the movable step as well as the distance between the tread and the inside surface of the frame are selected in such a manner that the geometrical axis of the stringers of the uppermost segment of unfolded stairs crosses the top surface of this tread in the proximity of the centre of the width thereof which has the same advantageous effect of transferring pressure as in the embodiments above.
  • the foldable stairs with an additional movable step according to the present invention are much more convenient than known stairs since the movable step facilitates walking up onto the surface above the frame.
  • Foldable stairs shown in Fig. 1 comprise a frame 1 embedded horizontally in a ceiling of a building, wherein the walls of the frame are relatively deep due to a thick ceiling or necessity of providing that the walls extend over the top surface of the ceiling.
  • the frame 1 can be closed by a cover 2 which is connected to the frame by means of a hinge mechanism and tie rod arrangement that restricts the opening limits of the cover 2.
  • the arrangement connecting the frame 1 with the cover 2 also comprises springs that support lifting up the cover with folded stairs segments to the closed state and also counterbalance the weight of the cover 2 and the stairs during opening thereof.
  • the stairs comprise three segments, wherein the uppermost stairs segment 3 is fixed to the cover 2. The number of segments and a method of connection between the segments and the cover are irrelevant to the subject of the present invention.
  • a movable step 4 is positioned within the interior of the frame 1 .
  • the movable step 4 is pivotally connected to the internal surface of the wall of the frame 1 and supported on the uppermost stairs segment 3 by means of two hinged connectors 5 that connect stringers (side beams) of this segment with lugs of the movable step 4 located below a tread 41 of the movable step 4.
  • the hinged connectors 5 are substantially aligned with the stringers of the uppermost stairs segment 3 (cf. Fig. 1 and Fig. 2 ) wherein the tread 41 of the movable step 4 is oriented substantially horizontally as the treads of the remaining steps of unfolded stairs segments.
  • the width of the tread 41 as well as the distance between the tread 41 and the inside surface of the frame 1 are selected in such a manner that the geometrical axis of the stringers of the uppermost segment 3 of the stairs crosses the top surface of the tread 41 in the proximity of the centre of its width.
  • the distance between the tread 41 of the movable step and a tread 31 of the uppermost step of the uppermost stairs segment 3 is selected to correspond to the step pitch of the stairs.
  • the hinged connectors 5 lift up the movable step 4 (cf. Fig. 3 ), and in closed state where the cover 2 is closed and stairs segments are positioned in the frame 1, the connectors are oriented substantially vertically. Also the stair tread 41 is then oriented substantially vertically inside the frame 1 in a close proximity of the frame wall (cf. Fig. 4 ).
  • the foldable stairs are additionally provided with a telescopic handrail (not shown in the drawings) which is jointedly connected with two segments of the stairs.
  • a spring positioned inside the handrail supports lifting up and folding all the stairs segments but the uppermost one, as well as counterbalances the weight of these segments while unfolding the stairs.
  • foldable stairs presented in Fig. 5 comprise a deep walled frame 1 embedded horizontally in a ceiling of a building and closable from the bottom by a cover 2 connected to the frame by a hinge mechanism and tie rod arrangement that restricts the opening limits of the cover 2.
  • the uppermost stairs segment 3 is fixed to the cover 2 and in this embodiment the stairs also comprise three segments but obviously the number of segments and their mutual connections are irrelevant to the subject of the present invention.
  • a movable step 6 is connected pivotally inside the frame 1 at the internal surface of the wall thereof and supported by the uppermost stairs segment 3 by means of two supporting legs 61 fixedly connected to the movable step 6.
  • the supporting legs 61 are substantially aligned with the stringers of the uppermost stairs segment 3 (cf. Fig. 5 ) wherein a tread 62 of the movable step 6 is oriented substantially horizontally as the treads of the remaining steps of unfolded stairs segments.
  • the width of the tread 62 as well as distance between the tread 62 and the inside surface of the frame 1 are selected in such a manner that the geometrical axis of the stringers of the uppermost segment 3 of the stairs crosses the top surface of the tread 62 in the proximity of the centre of its width.
  • the distance between the tread 62 of the movable step and a tread of the uppermost step of the uppermost stairs segment 3 is selected to correspond to the step pitch of the stairs (i.e. the rise height of the stars).
  • the supporting legs 61 can be provided with a mechanism for adjusting their length, e.g. by means of adjusting screws driven from the side of the stringers of the uppermost segment 3.
  • the foldable stairs are additionally provided with a telescopic handrail (not shown in the drawings) as in the Embodiment 1.
  • Folding the stairs in order to hide them within the frame 1 should be preceded by turning the movable step 6 to a position in which its tread 62 is oriented substantially vertically inside the frame 1 close to the frame wall (cf. Fig. 6 ). In this position the supporting legs 61 of the movable step 6 will be positioned above the space provided for the stair segments in closed state of the stairs.
  • foldable stairs comprise deep walled frame embedded horizontally in a ceiling of a building and closable from the bottom by a cover connected to the frame by a hinge mechanism and tie rod arrangement that restricts the opening limits of the cover.
  • the uppermost stairs segment is fixed to the cover.
  • brackets are fixed to the cover alongside stringers (side beams) of the uppermost stairs segment.
  • a movable step is positioned within the interior of the frame.
  • the movable step is pivotally connected to the internal surface of the wall of the frame and supported on the brackets by means of two hinged connectors that connect the brackets with lugs of the movable step located below a tread of the movable step.
  • the width of the tread of the movable step as well as the distance between this tread and the inside surface of the frame are selected in such a manner that geometrical axis of the stringers of the uppermost segment of the unfolded stairs crosses the top surface of the tread in the proximity of the centre of its width.
  • Functionality of the movable step in all its positions is identical as in the Embodiment 1.
  • the foldable stairs are additionally provided with a telescopic handrail.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Steps, Ramps, And Handrails (AREA)
  • Ladders (AREA)

Claims (5)

  1. Escalier pliable encastré dans un cadre (1), notamment dans un cadre profond ayant une hauteur de paroi accrue, comprenant des segments d'escalier mobiles les uns par rapport aux autres, dans lequel le segment d'escalier le plus haut (3) est relié en rotation au cadre (1) au moyen d'un mécanisme à charnière tandis que les segments d'escalier restants sont positionnés à l'intérieur dudit cadre (1) à l'état fermé d'escalier, dans lequel, à l'intérieur du cadre (1) une marche mobile (4, 6) est positionnée, reliée de manière pivotante à la surface interne de la paroi du cadre (1) dans lequel l'axe géométrique des longerons du segment le plus haut (3) de l'escalier, déplié pour son utilisation, croise la surface supérieure du giron (41, 62) de la marche mobile (4, 6) à proximité du centre de la largeur du giron (41, 62), caractérisé en ce que le segment d'escalier le plus haut (3) est fixé à un couvercle (2) qui ferme ledit cadre (1) au bas de celui-ci à l'état fermé de l'escalier, en ce que la marche mobile (4, 6) est supportée par au moins un élément de support relié au couvercle (2), caractérisé en outre en ce que
    chaque
    (i) ledit élément de support de la marche mobile (4, 6) est le segment d'escalier supérieur (3), dans lequel la marche mobile (4) est supportée par des connecteurs articulés (5) couplant le segment d'escalier le plus haut (3) et de préférence les longerons de ce segment (3) avec la marche mobile (4), les connecteurs articulés (5) étant, à l'état ouvert de l'escalier, sensiblement alignés avec les longerons du segment d'escalier le plus haut (3);
    ou
    (ii) ledit élément de support de la marche mobile (4, 6) est le segment d'escalier le plus haut (3), dans lequel la marche mobile (6) est pourvue de pieds de support (61) fixés au giron (62) de la marche (6), dans lequel, à l'état ouvert de l'escalier, les pieds de support (61) sont sensiblement alignés avec les longerons du segment le plus haut (3) de l'escalier et s'appuient sur les surfaces supérieures avant des longerons;
    ou
    (iii) ledit élément de support de la marche mobile est au moins un support fixé au couvercle, dans lequel la marche mobile est supportée par des connecteurs articulés couplant ledit au moins un support fixé au couvercle avec la marche mobile, dans lequel, à l'état ouvert de l'escalier, les connecteurs articulés sont orientés parallèlement aux longerons du segment le plus haut de l'escalier.
  2. L'escalier pliable selon la revendication 1, caractérisé en ce que la distance entre le giron de la marche mobile (4, 6) et le giron de la marche la plus haute (31) du segment le plus haut (3) de l'escalier correspond sensiblement à un pas de marche de l'escalier.
  3. L'escalier pliable selon l'une quelconque des revendications précédentes, dans lequel l'escalier est pourvu d'un mécanisme qui supporte le levage de l'escalier plié à l'état fermé de l'escalier et contrebalance au moins partiellement le poids de l'escalier lors de son ouverture.
  4. L'escalier pliable selon la revendication 3, dans lequel le mécanisme qui supporte le levage est un mécanisme à ressort.
  5. L'escalier pliable selon l'une quelconque des revendications précédentes, dans lequel l'escalier est pourvu d'un agencement de tirants qui limite les limites d'ouverture de l'escalier.
EP11706958.3A 2010-01-18 2011-01-12 Escalier escamotable encastré dans un cadre Active EP2526239B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PL390220A PL218283B1 (pl) 2010-01-18 2010-01-18 Schody składane, zwłaszcza osadzone w wysokiej ramie
PCT/PL2011/000005 WO2011087386A1 (fr) 2010-01-18 2011-01-12 Escalier escamotable encastré dans un cadre profond

Publications (2)

Publication Number Publication Date
EP2526239A1 EP2526239A1 (fr) 2012-11-28
EP2526239B1 true EP2526239B1 (fr) 2019-09-11

Family

ID=43828327

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11706958.3A Active EP2526239B1 (fr) 2010-01-18 2011-01-12 Escalier escamotable encastré dans un cadre

Country Status (4)

Country Link
EP (1) EP2526239B1 (fr)
CN (1) CN102753770A (fr)
PL (1) PL218283B1 (fr)
WO (1) WO2011087386A1 (fr)

Families Citing this family (14)

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Publication number Priority date Publication date Assignee Title
US9422769B2 (en) 2013-11-08 2016-08-23 Embraer S.A. Force-balancing mechanisms especially useful for assisted lifting/lowering of aircraft stairs
AT512482B1 (de) * 2012-01-19 2014-09-15 Minka Holz Und Metallverarbeitungs Gmbh Deckenverschlussorgan mit leiter oder treppe
PL229816B1 (pl) * 2012-03-09 2018-08-31 Fakro Pp Spolka Z Ograniczona Odpowiedzialnoscia Schody składane, zwłaszcza lekkie schody drewniane
AT513208A1 (de) * 2012-11-22 2014-02-15 Minka Holz Und Metallverarbeitungs Gmbh Deckenöffnungs-Verschlussorgan
CN103112598B (zh) * 2013-03-01 2015-11-18 玉环天润航空机械制造有限公司 折叠登机梯
CN104746816A (zh) * 2013-12-31 2015-07-01 德胜（苏州）洋楼有限公司 一种木屋用隐藏式储藏梯
CN105863496A (zh) * 2016-04-12 2016-08-17 国家电网公司 一种户外工作梯
US10151144B2 (en) 2016-12-14 2018-12-11 Werner Co. Ladder, wide rung and method
US10538966B2 (en) * 2017-05-10 2020-01-21 Werner Co. Ceiling ladder, deep step and method
CN115492322A (zh) * 2020-12-01 2022-12-20 常熟汉华机械有限公司 一种背景墙式隐藏爬梯
CN112982852B (zh) * 2021-02-26 2022-11-15 全学友 钢-混凝土组合装配式楼梯梯段
CN113027054A (zh) * 2021-03-22 2021-06-25 浙江宏超建设集团有限公司 一种装配式楼梯结构及其施工方法
CN113833218B (zh) * 2021-10-20 2022-12-13 北京城建七建设工程有限公司 可周转折叠式节能楼梯
CN113998060B (zh) * 2021-10-28 2024-07-05 中船黄埔文冲船舶有限公司 一种可移动式登艇梯

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Also Published As

Publication number Publication date
EP2526239A1 (fr) 2012-11-28
WO2011087386A8 (fr) 2011-09-29
PL218283B1 (pl) 2014-10-31
PL390220A1 (pl) 2011-08-01
CN102753770A (zh) 2012-10-24
WO2011087386A1 (fr) 2011-07-21

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