EP2474684B1 - Attic access unit with folding stairs - Google Patents

Attic access unit with folding stairs Download PDF

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Publication number
EP2474684B1
EP2474684B1 EP12000045.0A EP12000045A EP2474684B1 EP 2474684 B1 EP2474684 B1 EP 2474684B1 EP 12000045 A EP12000045 A EP 12000045A EP 2474684 B1 EP2474684 B1 EP 2474684B1
Authority
EP
European Patent Office
Prior art keywords
stairs
hatch
access unit
frame
attic access
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
EP12000045.0A
Other languages
German (de)
French (fr)
Other versions
EP2474684A3 (en
EP2474684A2 (en
Inventor
Bartlomiej Mos
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
Original Assignee
Fakro PP Sp zoo
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Publication date
Application filed by Fakro PP Sp zoo filed Critical Fakro PP Sp zoo
Publication of EP2474684A2 publication Critical patent/EP2474684A2/en
Publication of EP2474684A3 publication Critical patent/EP2474684A3/en
Application granted granted Critical
Publication of EP2474684B1 publication Critical patent/EP2474684B1/en
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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
    • 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
    • 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
    • E04F11/068—Movable stairways, e.g. of loft ladders which may or may not be concealable or extensible collapsible, e.g. folding, telescopic telescopic
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C9/00—Ladders characterised by being permanently attached to fixed structures, e.g. fire escapes
    • E06C9/06—Ladders characterised by being permanently attached to fixed structures, e.g. fire escapes movably mounted
    • E06C9/08—Ladders characterised by being permanently attached to fixed structures, e.g. fire escapes movably mounted with rigid longitudinal members
    • E06C9/085—Ladders characterised by being permanently attached to fixed structures, e.g. fire escapes movably mounted with rigid longitudinal members ladders unfolded in the direction of the longitudinal members

Definitions

  • This application relates to an attic access unit with folding stairs, which are unfolded downstairs to the room below the attic, and folded inside the frame, where the frame is used for mounting the attic access unit on the building slab.
  • Attic access unit with folding stairs from document FR2770550A1 .
  • Said attic access unit comprising a frame, hatch and stairs supported on artiulated lever device in the frame.
  • the articulated lever device comprising two parallel articulated levers connected to the frame and to other articulated lever which connect those parallel levers with the hatch.
  • one of the parallel lever is connected with the hatch by another articulated lever attached to said parallel lever on its middle height such that said hatch support is adjustable in relation to the frame in closed hatch position.
  • the artiulated lever device can be offset in a row of a mounting holes located on the frame such that the position of the hatch can be adjusted depending on the user requirements.
  • An attic access unit comprising a slab mounted frame and a hatch covering the frame from underneath.
  • the hatch is supported by at least a single pair of swivel joints, which forms a four - bar linkage with the hatch and the attic access unit, where the means of hatch support is adjustable in relation to the frame in closed position.
  • the attic access unit comprises the folding stairs, specifically pull-down stairs with hinged joints, scissor stairs or other type of stairs.
  • the attic access unit comprises folding stairs with hinged joints, the folding stairs are rotatably mounted in the frame, and the hatch is fixed to the top section of the folding stairs with two pairs of swivel joints. At least one pair comprises swivel joints joined with the frame with rotatably mounted adjustable length bars.
  • the stairs are rotatably mounted in the frame, and a top section of folding stairs comprises a main axis seated in the bearings of the top section of folding stairs.
  • the main axis has the first pair of fixed arms directly at the frame, and each arm cooperates with a swivel joint of the means of hatch support with adjustable length bar.
  • the adjustement, in the bar length of the connection of the one pair of the swivel joints with said bar allows for adjustment of the hatch position in vertical direction, and since the bars are installed on both sides of the unit, the adjustment also allows correction of the hatch position in lateral direction.
  • the swivel joints of the first and second pair have spacers in the joints between the arms and the top section of stairs to adjust horizontal position, lateral to the stairs.
  • Horizontal adjustment along the stairs is provided by the fixtures in oval holes, sliding in relation to the hatch, with fasteners fixing the fixtures to the hatch.
  • the hatch is supported directly by the frame with two pairs of swivel joints, forming a four-bar linkage with the hatch, where the connection of the bar with one swivel joint from each pair of the swivel joints is adjustable in the bar length.
  • Folding stairs are mounted on the top surface of the hatch. Folding stairs comprise a set of hinged sections, where the top section is mounted on the hatch and its position in relation to the hatch does not change during operation. Folding stairs further include scissor type mechanism with two parallel pantographs joined with treads. Scissor stairs are rotatably mounted on the top edge of the hatch and joined with flat bars rotatably mounted on the bottom edge of the hatch. Flat bars in folded position are positioned in the direction of the rotary joint in the top section of stairs and the hatch, and in unfolded position are positioned diagonally downwards, along the stairs.
  • Embodiment 1. - Figs. 1 to 7 Attic access unit with the hatch supported by the folding stairs, rotatably mounted in the frame.
  • the attic access unit of the first embodiment is a fire rated unit comprising a box type hatch lined with fire resistant and low thermal conductivity material and with an intumescent seal inside the frame in a closed hatch position.
  • Embodiment 2. - Figs. 8 to 10 Attic access unit with the hatch supported by the frame with stairs mounted on the hatch.
  • Main components and parts of the attic access unit frame 5, hatch 6, adjustable hinge 7, flat bar 71, adjustable bar 72, fixed fixture 73, sliding fixture 74 .
  • the hatch comprises pull-down stairs or scissor stairs (not shown in the figure), with standard joints that are well known from existing solutions.

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

Description

  • This application relates to an attic access unit with folding stairs, which are unfolded downstairs to the room below the attic, and folded inside the frame, where the frame is used for mounting the attic access unit on the building slab.
  • State of the art. There is known solution of attic access unit with folding stairs from document FR2770550A1 . Said attic access unit comprising a frame, hatch and stairs supported on artiulated lever device in the frame. The articulated lever device comprising two parallel articulated levers connected to the frame and to other articulated lever which connect those parallel levers with the hatch. Furthermore one of the parallel lever is connected with the hatch by another articulated lever attached to said parallel lever on its middle height such that said hatch support is adjustable in relation to the frame in closed hatch position. The artiulated lever device can be offset in a row of a mounting holes located on the frame such that the position of the hatch can be adjusted depending on the user requirements.
  • Disclosure. An attic access unit comprising a slab mounted frame and a hatch covering the frame from underneath. The hatch is supported by at least a single pair of swivel joints, which forms a four - bar linkage with the hatch and the attic access unit, where the means of hatch support is adjustable in relation to the frame in closed position. The attic access unit comprises the folding stairs, specifically pull-down stairs with hinged joints, scissor stairs or other type of stairs.
  • One embodiment of the attic access unit comprises folding stairs with hinged joints, the folding stairs are rotatably mounted in the frame, and the hatch is fixed to the top section of the folding stairs with two pairs of swivel joints. At least one pair comprises swivel joints joined with the frame with rotatably mounted adjustable length bars. The stairs are rotatably mounted in the frame, and a top section of folding stairs comprises a main axis seated in the bearings of the top section of folding stairs. Preferably, the main axis has the first pair of fixed arms directly at the frame, and each arm cooperates with a swivel joint of the means of hatch support with adjustable length bar. The adjustement, in the bar length of the connection of the one pair of the swivel joints with said bar allows for adjustment of the hatch position in vertical direction, and since the bars are installed on both sides of the unit, the adjustment also allows correction of the hatch position in lateral direction.
  • The swivel joints of the first and second pair have spacers in the joints between the arms and the top section of stairs to adjust horizontal position, lateral to the stairs. Horizontal adjustment along the stairs is provided by the fixtures in oval holes, sliding in relation to the hatch, with fasteners fixing the fixtures to the hatch.
  • In the second embodiment, the hatch is supported directly by the frame with two pairs of swivel joints, forming a four-bar linkage with the hatch, where the connection of the bar with one swivel joint from each pair of the swivel joints is adjustable in the bar length. Folding stairs are mounted on the top surface of the hatch. Folding stairs comprise a set of hinged sections, where the top section is mounted on the hatch and its position in relation to the hatch does not change during operation. Folding stairs further include scissor type mechanism with two parallel pantographs joined with treads. Scissor stairs are rotatably mounted on the top edge of the hatch and joined with flat bars rotatably mounted on the bottom edge of the hatch. Flat bars in folded position are positioned in the direction of the rotary joint in the top section of stairs and the hatch, and in unfolded position are positioned diagonally downwards, along the stairs.
  • Embodiments. The attic access unit with folding stairs of the present invention shown as embodiments in the following drawings, where the following figures shows:
    • Fig. 1 - Attic access unit comprising the frame, three - section folding stairs supporting the hatch - axonometric view.
    • Fig. 2 - Attic access unit of Fig. 1 in closed position (diagram with a single segment of folding stairs) - longitudinal section.
    • Fig. 3 - Attic access unit of Fig. 2 in the initial opening stage - longitudinal section.
    • Fig. 4 - Attic access unit of Fig. 2, completely open, with unfolded stairs (top and part of a middle section) - longitudinal section.
    • Fig. 5 - Swivel joint (first pair - cooperating with adjustable length bar) with the arm of the main axis of folding stairs - top view.
    • Fig. 6 -Swivel joint (second pair) with the top section of folding stairs - top view.
    • Fig. 7 - Sliding fixtures (for hinged joint) to the hatch - longitudinal section.
    • Fig. 8 - Frame with hatch and hinged mechanism with adjustable rotation axis joining the hatch with the frame - longitudinal section.
    • Fig. 9 - Hinge with adjustable rotation axis of Fig. 9, in closed hatch position - axonometric view.
    • Fig. 10 - Hinge with adjustable rotation axis of Fig. 9, in open hatch position - axonometric view.
  • Embodiment 1. - Figs. 1 to 7. Attic access unit with the hatch supported by the folding stairs, rotatably mounted in the frame. Main parts and components of the attic access unit: frame 1, folding stairs 2, comprising: top section 21, main axis 22, main axis arm 23; hatch 3, hinged joint, first pair 4, adjustable bar 41, hinged joint, second pair 42, spacers 43, sliding fixture 44. The attic access unit of the first embodiment is a fire rated unit comprising a box type hatch lined with fire resistant and low thermal conductivity material and with an intumescent seal inside the frame in a closed hatch position. Embodiment 2. - Figs. 8 to 10. Attic access unit with the hatch supported by the frame with stairs mounted on the hatch.
  • Main components and parts of the attic access unit: frame 5, hatch 6, adjustable hinge 7, flat bar 71, adjustable bar 72, fixed fixture 73, sliding fixture 74.The hatch comprises pull-down stairs or scissor stairs (not shown in the figure), with standard joints that are well known from existing solutions.

Claims (13)

  1. An attic access unit with a folding stairs comprising a frame (1) mounted in a slab with the folding stairs mounted in said frame (1), said stairs are arranged to be opened downwards to the room below said slab, and to be positioned inside said frame in closed attic access unit position, said attic access unit further including a hatch (3, 6), said hatch closing the frame (1) from underneath in the attic access unit closed position, said folding stairs and said hatch are rotatably mounted in the frame, preferably said folding stairs or said hatch are mounted directly in said frame, and said attic access unit further including a spring for partially compensating the weight of said stairs and said hatch (3, 6) is supported by at least a single pair of swivel joints, said swivel joints forming a four-bar linkage with said hatch (3, 6) and other component (21, 73) of said attic access unit, wherein the hatch is adjustably supported in relation to said frame in the attic access unit closed position by a means comprising a bar (41/72) which is connected rotatably with the frame (1) and with at least one of the swivel joints characterised in that the connection of the bar (41, 72) in said swivel joint is adjustable in the bar length.
  2. The attic access unit with stairs of claim 1 characterized in that the folding stairs (2) comprising hinged ladder type stairs sections (21, 25, 26), which are rotatably mounted in said frame (1), and said hatch is fixed to the top section (21) of said folding stairs with two pairs of the swivel joints (4, 42), where at least one of the swivel joints (4) is mounted in said frame (1) with rotatably mounted adjustable length bars (41).
  3. The attic access unit with stairs of claim 1 characterized in that said hatch is directly supported by said frame with two pairs of the swivel joints (71, 72), further the attic access unit comprising folding stairs mounted in the top surface of said hatch (6), where at least the connection of one swivel joint from each pair of the swivel joints (71, 72) is adjustable in the bar length.
  4. The attic access unit with stairs of claim 2 characterized in that the top section (21) of said folding stairs (2) comprises a main axis (22) fixed to said top section (21), and mounted in a frame bearings, preferably said main axis (22) comprising a pair of fixed arms (23), where each arm cooperates with the swivel joint (4) of said means of hatch support further including the adjustable length bar (41).
  5. The attic access unit with stairs of claim 4 characterized in that at the joint of the arm (23) of the main axis (22) with the swivel joint (4), said arm (23) comprises two walls on the opposite sides of said swivel joint, and a spacers (46) at the joint of said arm (23) and said swivel joint (4).
  6. The attic access unit with stairs of claim 5 characterized in that the second pair of the swivel joints (42) is joined with the top section (21) of said folding stairs with a pin (24) seated in said top section (21), preferably with spacers (46).
  7. The attic access unit with stairs of claim 4 or 5 or 6, characterized in that said top section (21) of said folding stairs comprises the supporting axis (27) joined on each end thereof with a flat bar (28) with two - arm lever (29), said lever is rotatably mounted in said frame, and a second arm of said lever (29) joined with a spring (16) joined with a fixed arm (17) of said frame.
  8. The attic access unit with stairs of claim 3 characterized in that said folding stairs comprise hinged sections (25, 26) with the top section (21) fixed to said frame (1).
  9. The attic access unit with stairs of claim 3 characterized in that the folding stairs comprise scissor stairs with two multiple pantographs joined with treads, said scissor stairs rotatably mounted on the frame, preferably joined with said frame with bars.
  10. The attic access unit with stairs of any preceding claim characterized in that said swivel joints (4, 42, 71, 72) are joined with said hatch (3, 6) with sliding fixtures (44, 74), preferably by fastening said fixtures to said hatch with threaded fasteners through oval holes in said fixtures.
  11. The attic access unit with stairs of any preceding claim characterized in that the spring tension (16, 82) counterbalancing the weight of said stairs and said hatch (3, 6) is selected to maintain closed position of said hatch with said stairs, preferably said hatch comprising a lock (34), maintaining closed position of said hatch as the alternative means of protection.
  12. The attic access unit with stairs of any preceding claim characterized in that seals are fitted between said frame (1) and said hatch (3,6).
  13. The attic access unit with stairs of claim 12 characterized in that said hatch is a box type structure lined with fire resistant and low thermal conductivity materials, and a intumescent seal fitted at said hatch (3, 6) perimeter inside said frame (1) in the attic access unit closed position.
EP12000045.0A 2011-01-11 2012-01-04 Attic access unit with folding stairs Active EP2474684B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PL393615A PL227158B1 (en) 2011-01-11 2011-01-11 Unit for closing the ceiling opening with the folding stairs

Publications (3)

Publication Number Publication Date
EP2474684A2 EP2474684A2 (en) 2012-07-11
EP2474684A3 EP2474684A3 (en) 2017-03-01
EP2474684B1 true EP2474684B1 (en) 2018-02-28

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ID=45654743

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12000045.0A Active EP2474684B1 (en) 2011-01-11 2012-01-04 Attic access unit with folding stairs

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EP (1) EP2474684B1 (en)
PL (1) PL227158B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111962677A (en) * 2020-08-31 2020-11-20 常州工学院 Two-side opening-closing type secondary folding mechanical attic device

Families Citing this family (9)

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Publication number Priority date Publication date Assignee Title
AT512482B1 (en) * 2012-01-19 2014-09-15 Minka Holz Und Metallverarbeitungs Gmbh CEILING ORGANIZER WITH LADDER OR STAIRCASE
PL229816B1 (en) * 2012-03-09 2018-08-31 Fakro Pp Spolka Z Ograniczona Odpowiedzialnoscia Folding stairs, especially lightweight wooden stairs
AT513208A1 (en) * 2012-11-22 2014-02-15 Minka Holz Und Metallverarbeitungs Gmbh Cover opening-closing member
CN108528752B (en) * 2018-06-04 2023-08-18 四川航泰航空装备有限公司 General rear cabin working ladder
CN110453858B (en) * 2019-08-22 2020-11-06 山东滕建建设集团有限公司 Assembled stair for building
CN111021648B (en) * 2019-12-24 2021-05-25 张亦军 Full-automatic pavilion escalator equipment
PL440752A1 (en) * 2022-03-24 2023-09-25 Fakro Pp Spółka Z Ograniczoną Odpowiedzialnością Hinge connecting the fixed and movable components of a structural element, especially attic stairs
PL442140A1 (en) * 2022-08-29 2024-03-04 Fakro Pp Spółka Z Ograniczoną Odpowiedzialnością Box structure of a building partition with electric drive
PL442139A1 (en) * 2022-08-29 2024-03-04 Fakro Pp Spółka Z Ograniczoną Odpowiedzialnością Box structure of a building partition

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GB388378A (en) * 1931-08-21 1933-02-21 Percy Harold Gorham Improvements in or relating to collapsible stairways or ladders
GB418344A (en) * 1934-03-05 1934-10-23 Eric Pride A new or improved ladder
DE1136091B (en) * 1956-10-23 1962-09-06 Johann Wagner Retractable attic stairs with articulated scissors
CH545398A (en) * 1970-12-31 1973-12-15 Heidesaege J Vogt Fa Closure for a ceiling opening
DE19748236C2 (en) * 1997-10-31 2002-04-18 Columbus Treppen Gmbh attic stairs
US9109365B2 (en) * 2008-03-26 2015-08-18 Mccoy Building Products, Llc Insulated cover for attic openings

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111962677A (en) * 2020-08-31 2020-11-20 常州工学院 Two-side opening-closing type secondary folding mechanical attic device
CN111962677B (en) * 2020-08-31 2021-06-25 常州工学院 Two-side opening-closing type secondary folding mechanical attic device

Also Published As

Publication number Publication date
PL393615A1 (en) 2012-07-16
EP2474684A3 (en) 2017-03-01
EP2474684A2 (en) 2012-07-11
PL227158B1 (en) 2017-11-30

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