EP2378025B1 - Collapsible spiral staircase - Google Patents

Collapsible spiral staircase Download PDF

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Publication number
EP2378025B1
EP2378025B1 EP11162459.9A EP11162459A EP2378025B1 EP 2378025 B1 EP2378025 B1 EP 2378025B1 EP 11162459 A EP11162459 A EP 11162459A EP 2378025 B1 EP2378025 B1 EP 2378025B1
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EP
European Patent Office
Prior art keywords
steps
staircase
mast
spiral
central
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
EP11162459.9A
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German (de)
French (fr)
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EP2378025A1 (en
Inventor
Pascal Oger
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.)
Chridami Medias
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Chridami Medias
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Publication date
Priority claimed from FR1052874A external-priority patent/FR2958954A1/en
Application filed by Chridami Medias filed Critical Chridami Medias
Publication of EP2378025A1 publication Critical patent/EP2378025A1/en
Application granted granted Critical
Publication of EP2378025B1 publication Critical patent/EP2378025B1/en
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    • 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
    • E04F11/022—Stairways; Layouts thereof characterised by the supporting structure
    • E04F11/032—Spiral stairways supported by a central column
    • 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

Definitions

  • the invention relates to helical stairs.
  • the invention applies to helical staircases comprising a central mast intended to be arranged vertically and adapted to support steps each extending in a substantially horizontal plane.
  • spiral staircases are conventionally laid between two floors located at different levels of a dwelling, for example between the ground floor and the cellar.
  • a hopper is arranged in the floor of the ground floor.
  • a disadvantage of such a staircase is that it does not allow the passage of bulky objects, in particular because it is helical, and in particular when the hopper has a small section.
  • the document FR 2 921 398 concerns a temporary spiral staircase consisting of several superimposed modules. The lower module is provided with a base which can be provided with wheels.
  • the document FR 1 231 558 relates to a retractable staircase comprising a central column on which are freely stacked steps and means for immobilizing the steps relative to each other.
  • the invention particularly aims to overcome these disadvantages of the prior art.
  • an object of the invention is to provide a helical staircase which allows the passage of bulky objects and which does not restrict the passage available to the user.
  • Another object of the invention is to provide a helical staircase which is simple to install and which is particularly suitable for hoppers of small section.
  • the invention also aims, according to at least one embodiment, to provide a staircase whose dimensions are adaptable according to the available volume, including the dimensions of the hopper, the height between floors and the access faces of the staircase.
  • the invention also aims, in at least one embodiment, to provide a helical staircase which provides a level of security satisfactory to users, which can be customized and offers the aesthetics of a traditional staircase.
  • the mast of the staircase is movable, while remaining vertical, said at least two steps comprising connecting means by pivot to a wall.
  • the mast can move in a horizontal plane (more precisely, the base of the mast moves along the floor) and is therefore movable between two positions.
  • the mast can be moved against a wall in a retracted position and the steps can be aligned vertically, so that the assembly formed by the mast and therefore the steps is effectively retracted.
  • the mast (and steps) can take two positions, respectively corresponding to a helical staircase and a vertical ladder.
  • the lower end of the mast comprises rolling means on the ground.
  • At least part of said steps is equipped with a locking device.
  • the upper end of said mast is intended to cooperate, in the first position, with means for maintaining the mast.
  • said steps comprise a ring intended to be threaded onto said central mast.
  • a ring may be provided on its upper face and / or lower a lug (or stop) for locking in rotation of said step.
  • said steps comprise at least one gripping zone.
  • the aligned steps can be used as a ladder.
  • the staircase of the invention comprises a mast or central shaft 2 constituted by a hollow tubular column comprising overthicknesses 2 'at regular intervals along the mast, shown in FIG. figure 4 .
  • the mast 2 is, in this example, made of metal.
  • the central mast 2 is intended to be arranged vertically between two floors 4, 6 and is adapted to support a set of steps 100 to 119 each extending in a substantially horizontal plane.
  • the staircase 10 is in the deployed position and on the figure 2 , the staircase 10 is in the retracted position against the wall 14.
  • Each step 100, ..., 119 comprises a tread substantially having, in this example, a substantially triangular shape as illustrated.
  • Figures 10A to 10C and figures 11 especially. More specifically, each step 100,..., 119 comprises a load-bearing frame or step support 30 arranged to receive a step top 31 ( figure 7 ).
  • the steps 100 to 119 are, in this embodiment, used for a staircase with left propeller, but they can obviously be used for a staircase with propeller on the right.
  • Each step 100, ..., 119 is fixed to the central mast 2 by means of a spacer sleeve or ring 3.
  • This spacer sleeve 3 allows the removable mounting of the step support on the central mast 2, by simply threading on this last.
  • the spacer sleeve 3 preferably has a cylindrical shape and an internal diameter allowing it to slide without play on the central mast 2. Its standardized height corresponds to the standardized height of each step 100, ..., 119.
  • steps 103 and 114 represented on Figures 10A and 10B ) which are secured to the central mast 2
  • steps 100 to 102, 104 to 113 and 115 to 119 are rotatably mounted on the central mast 2, in their substantially horizontal plane.
  • the Figure 1B is a view of the frame of the staircase of the invention showing the steps 103 and 114 which are immobilized on the central mast 2 by means of a pinning, an expandable sleeve (not shown) or by any other means appropriate.
  • the steps 103 and 114 are each connected to the masonry 14 by a pivot 201, 201 'respectively. More specifically, each step frame 103, 114 comprises a hollow cylinder 202, 202 'respectively intended to cooperate in rotation with the pivot 201, 201' respectively.
  • the figure 7 is a detailed view of the step 103, substantially triangular shape, which is connected to the mast 2 through a spacer sleeve 3 located at the top of the triangle.
  • the step 103 further comprises, at one end of the base of the triangle, a hollow cylinder 202 of vertical axis parallel to the central mast 2 which is therefore intended to cooperate with the pivot 201.
  • the central mast 2 of the staircase is connected to the wall 14 in rotation through these two steps 103 and 114, called upper pivot step 103 and lower pivot step 114, and pivots 201, 201 '.
  • the central mast 2 is movable between the deployed and retracted positions of the staircase illustrated on the Figures 1A and 2 respectively.
  • the central mast 2 is disposed in the center of the hopper 12 and the steps are arranged around the central mast 2 (extended position).
  • the figure 6 is a detail view of the staircase of the invention showing the lower end of the central mast 2 which is provided with a roller 18 of load recovery.
  • This roller 18 allows the central mast 2 to be rolled on the floor 6 of the lower floor so as to deploy or retract the stairs.
  • a support 16 and an axis 17 allow the roller 18 to be mounted at the lower end of the central mast 2 as illustrated in the view of FIG. figure 6 .
  • HDPE high density polyethylene pad
  • the staircase of the invention is particularly suitable for small section hoppers (referenced 12) and allows optimization of the space used when it is deployed.
  • Such a staircase is particularly suitable for developing a sub-plex or a floor.
  • Such a staircase makes it possible not to restrict, or to restrict only very slightly (compared to conventional stairs) the passage available to the user and uses a minimum space in the folded position. It ensures an adequate level of security for users and offers the aesthetics of a traditional staircase.
  • the figure 8 is a detail view of the staircase of the invention showing the conical centering and locking device 29 of the mast 2 on the upper platform 28 which allows the mast 2 to be held when the staircase is deployed ( Figure 1A ), thus improving the overall stability (and therefore safety).
  • the Figure 5A shows a circular piece 26 mounted at the upper end of the mast 2 on which the plate 28 is pressed when it is folded down, the piece 26 and the platform 28 comprising a central orifice 26 'and 28' ( figure 14A ) respectively in which is housed the lower tip-shaped upper railing 8 of the staircase.
  • the platform 28 illustrated on the figure 14A is pivotally connected to the upper floor 4 through the connecting piece 27 shown in FIG. figure 15 .
  • This connecting piece 27 is fixed to the upper floor 4 by screws and comprises two hinges 20, 21 intended to cooperate with hinges 22, 23 of the platform 28 (the Figure 14B which is a detail view of the figure 14A shows such hinge 22).
  • folding the platform 28 by pivoting makes it possible to lock the mast 2 and to stiffen the stairway when it is deployed.
  • the figure 3A is a top view of the hopper 12 and the staircase 10 of the invention when it is in operation, the steps being arranged around the mast 2 and the platform 28 being folded in a plane substantially parallel to the horizontal planes of the steps .
  • the figure 3B is a top view of the hopper 12 and the staircase 10 of the invention when it is retracted, the steps being arranged one above the other and the mast 2 being disposed against the wall 14, thus releasing the
  • the platform 28 is raised in a plane perpendicular to the planes of the steps, thus clearing the hopper 12.
  • the staircase of the invention has a helical ramp to ensure the safety of the users, this ramp consisting of a plurality of removable guardrails 5 in which passes a wire rope 7, for example.
  • the figure 13 represents the upper railing 8 of the staircase of the invention that can be distinguished on the Figures 1A and 1B .
  • This upper railing 8 is, as previously mentioned, mounted removably on the platform 28, and can be removed when the staircase 10 is retracted ( figure 2 ).
  • FIGs 9A and 9B are respectively views of a guard foot 9 securable to a walk by screwing and a removable guard 5. It is understood that the stem of the guardrail foot 9 ( Figure 9A ) is designed to be housed in the hollow lower end of the guardrail 5 ( Figure 9B ) and that the cable 7 passes into the ring 11 located at the upper end of the railing 5.
  • the figure 6 shows the locking device of the staircase in the form of a locking pin 15 located under each of the movable steps rotation 102, 113 and 119 (the latter being represented on the figure 6 ). Each of these pins is associated with a pin for locking all the steps. This device ensures the locking of the moving steps, in a functional position ( Figure 1A ) or retracted ( figure 2 ) of the staircase 10 (to secure the function ladder in the latter position as will be seen later).
  • the figure 16A is a partial view of the staircase of the invention when it is in operation or deployed, at the level of the upper pivot step 103.
  • the figure 16B is a sectional view along AA of the stairs of the figure 16A , the figure 16C being a detail view of the figure 16B at the central mast.
  • ten movable steps 104 to 113 are interposed between the upper pivot step 103 and the lower pivot step 114.
  • the pivot steps 103 and 114 are aligned vertically (they are therefore separated by an angle of 360 °).
  • the angle between each step is 32.73 ° when the staircase is deployed (as shown figure 16B ).
  • the Figure 17A is a partial view of the staircase of the invention when it is retracted, at the upper pivot step 103, the steps 101 to 105 are therefore vertically aligned the angle between the steps is 0 °).
  • the Figure 17B is a sectional view along BB of the stairs of the Figure 17A , the figure 17C being a detail view of the Figure 17B at the central mast.
  • Angular stops or lugs 24 formed on the upper contours 41 and lower 42 of the spacer sleeves or rings 3 of the steps allow two relative positions of each moving step ( Figure 10C ) and the upper pivoting step ( figure 10B ), namely a stop position in staircase position ( Figure 1A ) and a retracted stop position ( figure 2 ). It should be noted, however, that the lower pivoting step 114 does not comprise a lug on its upper contour 41 but only on its lower contour 42 (FIG. figure 10A ).
  • step 113 By again turning the step 113 32.73 ° in the counterclockwise direction, it causes the step 112 until the step 112 comes into contact with the stop of the step 111 which is then positioned above (or vertically aligned with) steps 112 and 113.
  • the rotation of the step 113 is repeated nine times (i.e., the step 113 is rotated 294.57 °) until the steps 103 to 114 are aligned.
  • the user can rotate the central mast 2 relative to the wall (through the two upper pivot 103 and lower 114 steps) until the assembly formed by the steps 100 to 119 and the mast 2 is in the vicinity of the wall 14 as shown in FIG. figure 2 .
  • the Figure 10C illustrates an example of a frame of a moving step in rotation of the staircase of the invention.
  • the framework of such a step allows a custom dressing of the tread in a material such as metal, wood, glass or stone for example.
  • the frame is optimized to provide minimum mass and maximum strength.
  • the environment, stair nosing, railing, lighting are determined according to the constraints of the environment and customer's wishes.
  • the frame 30 of the pivot steps 103 and 114 is customizable and may be covered by a trim piece 31 (screwed by example).
  • apertures or gripping cutouts 40 in the pivotally movable steps in rotation allow to use the assembly as a ladder.
  • This allows, in the retracted position of the staircase, to help transport a bulky object, without having to add a ladder.
  • the staircase can be used in its two positions. As mentioned above, the locking of the staircase in retracted position makes it possible to secure the "ladder" function.
  • the staircase 10 can be retracted into a housing in the wall 14 to further reduce the footprint in this position.
  • the Figure 5B is a perspective view of the upper sleeve 13 which is intended to be placed at the upper end of the central mast 2 and thus above the spacer sleeve 3 of the step 100.
  • This sleeve 13 thus allows the platform 28 of be secured to the central mast 2 in the same plane as the floor 4 and to be perfectly flat when the stair 10 is in function.
  • the shape of the tread steps is not limited to that illustrated but may take the form of a disc section, for example.
  • the railings may not be removed when the staircase 10 is retracted.
  • the steps are preferably in the form of a section of a circle / disk and the guardrail feet 9 are each arranged along the circular portion of the associated step, at a different angle from the guard foot of the step next and the previous, so that the bodyguards 5 juxtapose compactly when the staircase is retracted.
  • the dimensions of the staircase 10 are adaptable according to the available volume, in particular the dimensions (height and width) of the hopper 12, the height between the floors and the access faces of the staircase.
  • the number of steps connected to the wall by pivot may vary.
  • the rack support 16 solidaire central mast 2 may be connected to the ground by a pivot connection.
  • the mast can be made of any other material that provides the required strength (maximum strength) with a minimum footprint.
  • the steps may line respectively to the left and right of the mast, or one could predict that, as needed, only the top or bottom steps are folded.
  • the staircase may be motorized so that the steps and / or the mast are moved from the deployed position to the retracted position, and vice versa, automatically.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Ladders (AREA)

Description

1. Domaine de l'invention1. Field of the invention

L'invention se rapporte aux escaliers hélicoïdaux.The invention relates to helical stairs.

Plus particulièrement, l'invention s'applique aux escaliers hélicoïdaux comportant un mât central destiné à être disposé verticalement et adapté pour supporter des marches s'étendant chacune dans un plan sensiblement horizontal.More particularly, the invention applies to helical staircases comprising a central mast intended to be arranged vertically and adapted to support steps each extending in a substantially horizontal plane.

2. Solutions de l'art antérieur2. Solutions of the prior art

Les escaliers hélicoïdaux, ou escaliers à vis, sont classiquement posés entre deux planchers situés à des niveaux différents d'une habitation, par exemple entre le rez-de-chaussée et la cave. Pour ce faire, une trémie est aménagée dans le plancher du rez-de-chaussée.The spiral staircases, or spiral staircases, are conventionally laid between two floors located at different levels of a dwelling, for example between the ground floor and the cellar. To do this, a hopper is arranged in the floor of the ground floor.

Un inconvénient d'un tel escalier est qu'il ne permet pas le passage d'objets volumineux, notamment du fait qu'il est de forme hélicoïdale, et en particulier lorsque la trémie présente une faible section. Le document FR 2 921 398 concerne un escalier provisoire en colimaçon formé de plusieurs modules superposés. Le module inférieur est pourvu d'une embase qui peut être munie de roulettes. Le document FR 1 231 558 concerne un escalier escamotable comprenant une colonne centrale sur laquelle sont empilées librement des marches et des moyens pour immobiliser les marches l'une par rapport à l'autre.A disadvantage of such a staircase is that it does not allow the passage of bulky objects, in particular because it is helical, and in particular when the hopper has a small section. The document FR 2 921 398 concerns a temporary spiral staircase consisting of several superimposed modules. The lower module is provided with a base which can be provided with wheels. The document FR 1 231 558 relates to a retractable staircase comprising a central column on which are freely stacked steps and means for immobilizing the steps relative to each other.

3. Objectifs de l'invention3. Objectives of the invention

L'invention a notamment pour objectif de pallier ces inconvénients de l'art antérieur.The invention particularly aims to overcome these disadvantages of the prior art.

Plus précisément, un objectif de l'invention est de fournir un escalier hélicoïdal qui permette le passage d'objets volumineux et qui ne restreint pas le passage disponible pour l'utilisateur.More specifically, an object of the invention is to provide a helical staircase which allows the passage of bulky objects and which does not restrict the passage available to the user.

Un autre objectif de l'invention est de fournir un escalier hélicoïdal qui soit simple à poser et qui est particulièrement adapté aux trémies de faible section.Another object of the invention is to provide a helical staircase which is simple to install and which is particularly suitable for hoppers of small section.

L'invention a encore pour objectif, selon au moins un mode de réalisation, de fournir un escalier dont les dimensions sont adaptables selon le volume disponible, notamment les dimensions de la trémie, la hauteur entre planchers et les faces d'accès de l'escalier.The invention also aims, according to at least one embodiment, to provide a staircase whose dimensions are adaptable according to the available volume, including the dimensions of the hopper, the height between floors and the access faces of the staircase.

L'invention a également pour objectif, selon au moins un mode de réalisation, de fournir un escalier hélicoïdal qui assure un niveau de sécurité satisfaisant pour les utilisateurs, qui puisse être personnalisé et qui offre l'esthétique d'un escalier traditionnel.The invention also aims, in at least one embodiment, to provide a helical staircase which provides a level of security satisfactory to users, which can be customized and offers the aesthetics of a traditional staircase.

4. Caractéristiques essentielles de l'invention4. Essential characteristics of the invention

Ces objectifs, ainsi que d'autres qui apparaîtront par la suite, sont atteints à l'aide d'un escalier hélicoïdal escamotable comportant un mât central destiné à être disposé verticalement et adapté pour supporter des marches s'étendant chacune dans un plan sensiblement horizontal, une partie au moins des marches étant montées mobiles en rotation par rapport au mât central, dans leurs plans sensiblement horizontaux respectifs, et au moins deux desdites marches étant fixées audit mât, ledit mât central pouvant prendre au moins deux positions :

  • une première position, dite position de fonction, dans laquelle lesdites marches sont
    disposées autour dudit mât central ;
  • une deuxième position, dite position d'escamotage, dans laquelle lesdites marches sont alignés verticalement.
These objectives, as well as others which will appear later, are achieved by means of a retractable spiral staircase comprising a central mast intended to be arranged vertically and adapted to support steps each extending in a substantially horizontal plane. at least a part of the steps being rotatably mounted relative to the central mast, in their respective substantially horizontal planes, and at least two of said steps being fixed to said mast, said central mast being able to assume at least two positions:
  • a first position, said position of function, in which said steps are
    arranged around said central mast;
  • a second position, said retracted position, wherein said steps are aligned vertically.

Selon l'invention, et contrairement aux escaliers hélicoïdaux connus dont le mât est fixé à sa base sur le sol par une platine scellée ou par encastrement, le mât de l'escalier est mobile, en restant vertical, lesdites au moins deux marches comprenant des moyens de liaison par pivot à un mur.According to the invention, and contrary to known spiral staircases whose mast is fixed at its base on the ground by a sealed plate or by embedding, the mast of the staircase is movable, while remaining vertical, said at least two steps comprising connecting means by pivot to a wall.

Ainsi, le mât peut se déplacer dans un plan horizontal (plus précisément, la base du mât se déplace le long du plancher) et est donc mobile entre deux positions. Le mât peut être déplacé contre un mur dans une position escamotée et les marches peuvent être alignées verticalement, de façon que l'ensemble formé par le mât et par conséquent les marches soit efficacement escamotée.Thus, the mast can move in a horizontal plane (more precisely, the base of the mast moves along the floor) and is therefore movable between two positions. The mast can be moved against a wall in a retracted position and the steps can be aligned vertically, so that the assembly formed by the mast and therefore the steps is effectively retracted.

Le mât (et les marches) peuvent prendre deux positions, correspondant respectivement à un escalier hélicoïdal et à une échelle verticale.The mast (and steps) can take two positions, respectively corresponding to a helical staircase and a vertical ladder.

Ceci permet en effet de libérer la trémie où est déployé l'escalier pour le passage d'objets volumineux par exemple.This makes it possible to release the hopper where is deployed the staircase for the passage of bulky objects for example.

Dans un mode de réalisation particulier de l'invention, l'extrémité inférieure du mât comprend des moyens de roulement sur le sol.In a particular embodiment of the invention, the lower end of the mast comprises rolling means on the ground.

Préférentiellement, au moins une partie desdites marches est équipée d'un dispositif de verrouillage.Preferably, at least part of said steps is equipped with a locking device.

Dans un mode de réalisation particulier de l'invention, l'extrémité supérieure dudit mât est destinée à coopérer, dans la première position, avec des moyens de maintien du mât.In a particular embodiment of the invention, the upper end of said mast is intended to cooperate, in the first position, with means for maintaining the mast.

De préférence, lesdites marches comprennent une bague destinée à être enfilé sur ledit mât central. Une telle bague peut être munie sur sa face supérieure et/ou inférieure d'un ergot (ou butée) de blocage en rotation de ladite marche.Preferably, said steps comprise a ring intended to be threaded onto said central mast. Such a ring may be provided on its upper face and / or lower a lug (or stop) for locking in rotation of said step.

Avantageusement, lesdites marches comprennent au moins une zone de préhension. Ainsi, dans ladite deuxième position, les marches alignées peuvent être utilisées comme échelle.Advantageously, said steps comprise at least one gripping zone. Thus, in said second position, the aligned steps can be used as a ladder.

5. Liste des figures5. List of figures

D'autres caractéristiques et avantages de l'invention apparaîtront plus clairement à la lecture de la description suivante d'un mode de réalisation préférentiel, donné à titre de simple exemple illustratif et non limitatif, et des dessins annexés, parmi lesquels :

  • la figure 1A représente l'escalier de l'invention lorsqu'il est en fonction ;
  • la figure 1B illustre l'ossature de l'escalier de la figure 1A :
  • la figure 2 représente l'escalier de l'invention lorsqu'il est escamoté ;
  • les figures 3A et 3B sont des vues de dessus de l'escalier de l'invention lorsqu'il est en fonction et escamoté, respectivement ;
  • la figure 4 est une vue du mât central de l'escalier de l'invention ;
  • la figure 5A est une vue en perspective de la pièce de verrouillage du mât de la figure 4 ;
  • la figure 5B est une vue en perspective du manchon supérieur ;
  • la figure 6 est une vue en perspective de l'extrémité inférieure de l'escalier de l'invention montrant le galet de support de charge et le dispositif de verrouillage d'une marche ;
  • la figure 7 est une vue en perspective d'une partie de l'escalier de
    l'invention montrant une marche solidaire du mât et le dispositif de liaison par pivot de cette marche à un mur ;
  • la figure 8 est une vue en coupe de côté de la partie supérieure du mât assemblée avec la plateforme et le garde corps supérieur de l'escalier de l'invention ;
  • les figures 9A et 9B sont respectivement des vues d'un pied de garde de corps et d'un garde corps de l'escalier de l'invention ;
  • les figures 10A et 10B représentent respectivement la marche inférieure et la marche supérieure de l'escalier de l'invention qui sont solidarisées au mât central et reliées à un mur par une liaison pivot ;
  • la figure 10C représente une marche de l'escalier de l'invention destinée à être montée rotative sur le mât central de l'escalier de l'invention ;
  • la figure 11 est une vue de dessus d'une marche de l'escalier de l'invention comportant des découpes de préhension ;
  • la figure 12 représente le support des liaisons pivots destinées à relier les marches des figures 10A et 10B à un mur ;
  • la figure 13 représente le garde corps supérieur de l'escalier de l'invention ;
  • la figure 14A est une vue en perspective de la plateforme supérieure de l'escalier de l'invention, la figure 14B étant une vue de détail de la plateforme de la figure 14A ;
  • la figure 15 représente la fixation de la plateforme de la figure 14A à un plancher ;
  • la figure 16A est une vue partielle de l'escalier de l'invention lorsqu'il est en fonction ;
  • la figure 16B est une vue en coupe selon A-A de l'escalier de la figure 16A, la figure 16C étant une vue de détail de la figure 16B ;
  • la figure 17A est une vue partielle de l'escalier de l'invention lorsqu'il est escamoté ;
  • la figure 17B est une vue en coupe selon B-B de l'escalier de la figure 17A, la figure 17C étant une vue de détail de la figure 17B.
Other characteristics and advantages of the invention will appear more clearly on reading the following description of a preferred embodiment, given as a simple illustrative and nonlimiting example, and the appended drawings, among which:
  • the Figure 1A represents the staircase of the invention when it is in operation;
  • the Figure 1B illustrates the skeleton of the stairs of the Figure 1A :
  • the figure 2 represents the staircase of the invention when it is retracted;
  • the Figures 3A and 3B are top views of the staircase of the invention when in use and retracted, respectively;
  • the figure 4 is a view of the central mast of the staircase of the invention;
  • the Figure 5A is a perspective view of the mast lock piece of the figure 4 ;
  • the Figure 5B is a perspective view of the upper sleeve;
  • the figure 6 is a perspective view of the lower end of the staircase of the invention showing the load-bearing roller and the locking device of a step;
  • the figure 7 is a perspective view of part of the stairs of
    the invention showing a step integral with the mast and the pivot connection device of this step to a wall;
  • the figure 8 is a side sectional view of the upper part of the mast assembled with the platform and the upper guardrail of the staircase of the invention;
  • the Figures 9A and 9B are respectively views of a guardrail and guardrail of the staircase of the invention;
  • the Figures 10A and 10B represent respectively the lower step and the top step of the staircase of the invention which are secured to the central mast and connected to a wall by a pivot connection;
  • the Figure 10C represents a stair step of the invention intended to be rotatably mounted on the central mast of the stair of the invention;
  • the figure 11 is a top view of a stair step of the invention comprising gripping cutouts;
  • the figure 12 represents the support of the pivot links intended to connect the markets of the Figures 10A and 10B to a wall;
  • the figure 13 represents the upper guardrail of the staircase of the invention;
  • the figure 14A is a perspective view of the upper platform of the staircase of the invention, the Figure 14B being a detailed view of the platform of the figure 14A ;
  • the figure 15 represents the fixing of the platform of the figure 14A to a floor;
  • the figure 16A is a partial view of the staircase of the invention when it is in operation;
  • the figure 16B is a sectional view along AA of the stairs of the figure 16A , the figure 16C being a detail view of the figure 16B ;
  • the Figure 17A is a partial view of the staircase of the invention when it is retracted;
  • the Figure 17B is a sectional view along BB of the stairs of the Figure 17A , the figure 17C being a detail view of the Figure 17B .

6. Description d'un mode de réalisation de l'invention6. Description of an embodiment of the invention

On présente par la suite un mode de réalisation particulier de l'escalier hélicoïdal escamotable de l'invention.Next, a particular embodiment of the retractable helical staircase of the invention is presented.

L'escalier de l'invention comprend un mât ou fût central 2 constitué par une colonne tubulaire creuse comprenant des surépaisseurs 2' à intervalles réguliers le long du mât, représenté sur la figure 4. Le mât 2 est, dans cet exemple, fabriqué en métal. Le mât central 2 est destiné à être disposé verticalement entre deux planchers 4, 6 et est adapté pour supporter un ensemble de marches 100 à 119 s'étendant chacune dans un plan sensiblement horizontal.The staircase of the invention comprises a mast or central shaft 2 constituted by a hollow tubular column comprising overthicknesses 2 'at regular intervals along the mast, shown in FIG. figure 4 . The mast 2 is, in this example, made of metal. The central mast 2 is intended to be arranged vertically between two floors 4, 6 and is adapted to support a set of steps 100 to 119 each extending in a substantially horizontal plane.

Sur la figure 1A, l'escalier 10 est en position déployée et sur la figure 2, l'escalier 10 est en position escamotée contre le mur 14.On the Figure 1A , the staircase 10 is in the deployed position and on the figure 2 , the staircase 10 is in the retracted position against the wall 14.

Chaque marche 100, ..., 119 comprend un giron présentant sensiblement, dans cet exemple, une forme sensiblement en triangle comme illustré figures 10A à 10C et figures 11 notamment. Plus précisément, chaque marche 100, ..., 119 comprend une ossature porteuse ou support de marche 30 agencée pour recevoir un dessus de marche 31 (figure 7). Les marches 100 à 119 sont, dans ce mode de réalisation, utilisées pour un escalier avec hélice à gauche, mais elles peuvent bien évidemment être utilisées pour un escalier avec hélice à droite.Each step 100, ..., 119 comprises a tread substantially having, in this example, a substantially triangular shape as illustrated. Figures 10A to 10C and figures 11 especially. More specifically, each step 100,..., 119 comprises a load-bearing frame or step support 30 arranged to receive a step top 31 ( figure 7 ). The steps 100 to 119 are, in this embodiment, used for a staircase with left propeller, but they can obviously be used for a staircase with propeller on the right.

Chaque marche 100, ..., 119 est fixée au mât central 2 au moyen d'un manchon-entretoise ou bague 3. Ce manchon-entretoise 3 permet le montage amovible du support de marche sur le mât central 2, par simple enfilage sur ce dernier. Le manchon-entretoise 3 a de préférence, une forme cylindrique et un diamètre intérieur lui permettant de coulisser sans jeu sur le mât central 2. Sa hauteur standardisée correspond à la hauteur standardisée de chaque marche 100, ..., 119. Une fois les marches 100, ..., 119 montées sur le mât 2, chaque manchon 3 occupe l'espace situé entre deux surépaisseurs 2', les manchons 3 étant juxtaposés de telle façon que le mât central 2 n'est plus visible une fois l'escalier assemblé.Each step 100, ..., 119 is fixed to the central mast 2 by means of a spacer sleeve or ring 3. This spacer sleeve 3 allows the removable mounting of the step support on the central mast 2, by simply threading on this last. The spacer sleeve 3 preferably has a cylindrical shape and an internal diameter allowing it to slide without play on the central mast 2. Its standardized height corresponds to the standardized height of each step 100, ..., 119. Once the steps 100, ..., 119 mounted on the mast 2, each sleeve 3 occupies the space between two oversizes 2 ', the sleeves 3 are juxtaposed so that the central mast 2 is no longer visible once the assembled staircase.

On notera qu'à l'exception des marches 103 et 114 (représentées sur les figures 10A et 10B) qui sont solidarisées au mât central 2, les marches 100 à 102, 104 à 113 et 115 à 119 sont montées mobiles en rotation sur le mât central 2, dans leur plan sensiblement horizontal.It should be noted that with the exception of steps 103 and 114 (represented on Figures 10A and 10B ) which are secured to the central mast 2, the steps 100 to 102, 104 to 113 and 115 to 119 are rotatably mounted on the central mast 2, in their substantially horizontal plane.

La figure 1B est une vue de l'ossature de l'escalier de l'invention montrant les marches 103 et 114 qui sont immobilisées sur le mât central 2 au moyen d'un goupillage, d'un manchon expansible (non représentés) ou par tout autre moyen approprié. Les marches 103 et 114 sont chacune reliées à la maçonnerie 14 par un pivot 201, 201' respectivement. Plus précisément, chaque ossature 30 de marche 103, 114 comprend un cylindre creux 202, 202' respectivement destiné à coopérer en rotation avec le pivot 201, 201' respectivement. Ces pivots 201, 201' sont par exemple vissés à une pièce de support 210 (représentée seule sur la figure 12) qui est fixée verticalement au mur 14. Il est à noter que quelle que soit la position de l'escalier (escamotée, déployée ou en position intermédiaire), les marches 103 et 114 restent alignées verticalement.The Figure 1B is a view of the frame of the staircase of the invention showing the steps 103 and 114 which are immobilized on the central mast 2 by means of a pinning, an expandable sleeve (not shown) or by any other means appropriate. The steps 103 and 114 are each connected to the masonry 14 by a pivot 201, 201 'respectively. More specifically, each step frame 103, 114 comprises a hollow cylinder 202, 202 'respectively intended to cooperate in rotation with the pivot 201, 201' respectively. These pivots 201, 201 'are for example screwed to a support part 210 (shown alone on the figure 12 ) which is fixed vertically to the wall 14. It should be noted that regardless of the position of the stair (retracted, deployed or in the intermediate position), the steps 103 and 114 remain vertically aligned.

La figure 7 est une vue détaillée de la marche 103, de forme sensiblement triangulaire, qui est liée au mât 2 par le biais d'un manchon-entretoise 3 situé au sommet du triangle. La marche 103 comporte en outre, à une extrémité de la base du triangle, un cylindre creux 202 d'axe vertical parallèle au mât central 2 qui est donc destiné à coopérer avec le pivot 201.The figure 7 is a detailed view of the step 103, substantially triangular shape, which is connected to the mast 2 through a spacer sleeve 3 located at the top of the triangle. The step 103 further comprises, at one end of the base of the triangle, a hollow cylinder 202 of vertical axis parallel to the central mast 2 which is therefore intended to cooperate with the pivot 201.

Ainsi, le mât central 2 de l'escalier est relié au mur 14 en rotation par le biais de ces deux marches 103 et 114, appelées marche pivot supérieure 103 et marche pivot inférieure 114, et des pivots 201, 201'. Selon l'invention, le mât central 2 est mobile entre les positions déployée et escamotée de l'escalier illustrées sur les figures 1A et 2 respectivement.Thus, the central mast 2 of the staircase is connected to the wall 14 in rotation through these two steps 103 and 114, called upper pivot step 103 and lower pivot step 114, and pivots 201, 201 '. According to the invention, the central mast 2 is movable between the deployed and retracted positions of the staircase illustrated on the Figures 1A and 2 respectively.

Ainsi, sur la figure 1A, le mât central 2 est disposé au centre de la trémie 12 et les marches sont disposées autour du mât central 2 (position déployée).So, on the Figure 1A , the central mast 2 is disposed in the center of the hopper 12 and the steps are arranged around the central mast 2 (extended position).

Sur la figure 2, les marches mobiles 100 à 102 et 104 à 119 ont été pivotées autour du mât central 2 et alignées verticalement avec les marches pivot 103 et 114, puis le mât 2 a été déplacé contre le mur 14 (position escamotée).On the figure 2 , the movable steps 100 to 102 and 104 to 119 were pivoted around the central mast 2 and aligned vertically with the pivot steps 103 and 114, and the mast 2 was moved against the wall 14 (retracted position).

La figure 6 est une vue de détail de l'escalier de l'invention montrant l'extrémité inférieure du mât central 2 qui est munie d'un galet 18 de reprise de charge. Ce galet 18 permet au mât central 2 d'être déplacé par roulement sur le sol 6 de l'étage inférieur de façon à déployer ou escamoter l'escalier. Un support 16 et un axe 17 permettent le montage du galet 18 à l'extrémité inférieure du mât central 2 comme illustré sur la vue de la figure 6.The figure 6 is a detail view of the staircase of the invention showing the lower end of the central mast 2 which is provided with a roller 18 of load recovery. This roller 18 allows the central mast 2 to be rolled on the floor 6 of the lower floor so as to deploy or retract the stairs. A support 16 and an axis 17 allow the roller 18 to be mounted at the lower end of the central mast 2 as illustrated in the view of FIG. figure 6 .

Dans une alternative, on envisage la mise en oeuvre d'un patin en polyéthylène haute densité (PEHD) pour déplacer le mât sur le sol.In an alternative, it is contemplated the implementation of a high density polyethylene pad (HDPE) to move the mast on the ground.

L'escalier de l'invention est particulièrement adapté pour les trémies de faible section (référencée 12) et permet une optimisation de l'espace utilisé lorsqu'il est déployé.The staircase of the invention is particularly suitable for small section hoppers (referenced 12) and allows optimization of the space used when it is deployed.

Lorsqu'il est escamoté, il remplit un volume restreint (en d'autres termes, l'espace qu'il occupe, ou l'encombrement au sol et en volume, est réduit) et libère l'espace de la trémie 12, permettant ainsi le passage d'objets volumineux. Un tel escalier est particulièrement adapté pour aménager un sous-plexe ou un étage.When it is retracted, it fills a small volume (in other words, the space it occupies, or the footprint and volume, is reduced) and frees the space of the hopper 12, allowing thus the passage of voluminous objects. Such a staircase is particularly suitable for developing a sub-plex or a floor.

Un tel escalier permet de ne pas restreindre, ou de ne restreindre que très faiblement (par rapport aux escaliers classiques) le passage disponible pour l'utilisateur et utilise un espace minimum en position repliée. Il permet d'assurer un niveau convenable de sécurité pour les utilisateurs et offre l'esthétique d'un escalier traditionnel.Such a staircase makes it possible not to restrict, or to restrict only very slightly (compared to conventional stairs) the passage available to the user and uses a minimum space in the folded position. It ensures an adequate level of security for users and offers the aesthetics of a traditional staircase.

La figure 8 est une vue de détail de l'escalier de l'invention montrant le dispositif de centrage conique et de verrouillage 29 du mât 2 sur la plateforme supérieure 28 qui permet le maintien du mât 2 lorsque l'escalier est déployé (figure 1A), améliorant ainsi la stabilité de l'ensemble (et par conséquent la sécurité). La figure 5A montre une pièce circulaire 26 montée à l'extrémité supérieure du mât 2 sur laquelle vient se plaquer la plateforme 28 lorsqu'elle est rabattue, la pièce 26 et la plateforme 28 comprenant un orifice central 26' et 28' (figure 14A) respectivement dans lequel vient se loger l'extrémité inférieure en forme de pointe du garde-corps supérieur 8 de l'escalier.The figure 8 is a detail view of the staircase of the invention showing the conical centering and locking device 29 of the mast 2 on the upper platform 28 which allows the mast 2 to be held when the staircase is deployed ( Figure 1A ), thus improving the overall stability (and therefore safety). The Figure 5A shows a circular piece 26 mounted at the upper end of the mast 2 on which the plate 28 is pressed when it is folded down, the piece 26 and the platform 28 comprising a central orifice 26 'and 28' ( figure 14A ) respectively in which is housed the lower tip-shaped upper railing 8 of the staircase.

La plateforme 28 illustrée sur la figure 14A est reliée de manière pivotante au plancher supérieur 4 par le biais de la pièce de liaison 27 illustrée sur la figure 15. Cette pièce de liaison 27 est fixée au plancher supérieur 4 par des vis et comprend deux gonds 20, 21 destinés à coopérer avec des pentures 22, 23 de la plateforme 28 (la figure 14B qui est une vue de détail de la figure 14A montre une telle penture 22). Ainsi, le rabattement de la plateforme 28 par pivotement permet de verrouiller le mât 2 et de rigidifier l'escalier lorsqu'il est déployé.The platform 28 illustrated on the figure 14A is pivotally connected to the upper floor 4 through the connecting piece 27 shown in FIG. figure 15 . This connecting piece 27 is fixed to the upper floor 4 by screws and comprises two hinges 20, 21 intended to cooperate with hinges 22, 23 of the platform 28 (the Figure 14B which is a detail view of the figure 14A shows such hinge 22). Thus, folding the platform 28 by pivoting makes it possible to lock the mast 2 and to stiffen the stairway when it is deployed.

La figure 3A est une vue de dessus de la trémie 12 et de l'escalier 10 de l'invention lorsqu'il est en fonction, les marches étant disposées autour du mât 2 et la plateforme 28 étant rabattue dans un plan sensiblement parallèle aux plans horizontaux des marches.The figure 3A is a top view of the hopper 12 and the staircase 10 of the invention when it is in operation, the steps being arranged around the mast 2 and the platform 28 being folded in a plane substantially parallel to the horizontal planes of the steps .

La figure 3B est une vue de dessus de la trémie 12 et de l'escalier 10 de l'invention lorsqu'il est escamoté, les marches étant disposées les unes au-dessus des autres et le mât 2 étant disposé contre le mur 14, libérant ainsi l'espace de la trémie 12. En outre, la plateforme 28 est relevée dans un plan perpendiculaire aux plans des marches, dégageant ainsi la trémie 12.The figure 3B is a top view of the hopper 12 and the staircase 10 of the invention when it is retracted, the steps being arranged one above the other and the mast 2 being disposed against the wall 14, thus releasing the In addition, the platform 28 is raised in a plane perpendicular to the planes of the steps, thus clearing the hopper 12.

On notera que l'escalier de l'invention présente une rampe hélicoïdale pour assurer la sécurité des utilisateurs, cette rampe étant constituée d'une pluralité de garde-corps amovibles 5 dans lesquels passe un câble métallique 7, par exemple. La figure 13 représente le garde-corps supérieur 8 de l'escalier de l'invention que l'on distingue sur les figures 1A et 1B. Ce garde-corps supérieur 8 est, comme mentionné précédemment, monté de manière amovible sur la plateforme 28, et peut être retiré lorsque l'escalier 10 est escamoté (figure 2).It will be noted that the staircase of the invention has a helical ramp to ensure the safety of the users, this ramp consisting of a plurality of removable guardrails 5 in which passes a wire rope 7, for example. The figure 13 represents the upper railing 8 of the staircase of the invention that can be distinguished on the Figures 1A and 1B . This upper railing 8 is, as previously mentioned, mounted removably on the platform 28, and can be removed when the staircase 10 is retracted ( figure 2 ).

Les figures 9A et 9B sont respectivement des vues d'un pied de garde de corps 9 solidarisable à une marche par vissage et d'un garde corps amovible 5. On comprend que la tige du pied de garde-corps 9 (figure 9A) est conçue pour venir se loger dans l'extrémité inférieure creuse du garde-corps 5 (figure 9B) et que le câble 7 passe dans l'anneau 11 situé à l'extrémité supérieure du garde-corps 5.The Figures 9A and 9B are respectively views of a guard foot 9 securable to a walk by screwing and a removable guard 5. It is understood that the stem of the guardrail foot 9 ( Figure 9A ) is designed to be housed in the hollow lower end of the guardrail 5 ( Figure 9B ) and that the cable 7 passes into the ring 11 located at the upper end of the railing 5.

La figure 6 montre le dispositif de verrouillage de l'escalier sous la forme d'une broche de verrouillage 15 située sous chacune des marches mobiles en rotation 102, 113 et 119 (cette dernière étant représentée sur la figure 6). Chacune de ces broches est associée à une goupille permettant de verrouiller l'ensemble des marches. Ce dispositif assure le verrouillage des marches mobiles, en position fonctionnelle (figure 1A) ou escamotée (figure 2) de l'escalier 10 (pour sécuriser la fonction échelle dans cette dernière position comme on le verra par la suite).The figure 6 shows the locking device of the staircase in the form of a locking pin 15 located under each of the movable steps rotation 102, 113 and 119 (the latter being represented on the figure 6 ). Each of these pins is associated with a pin for locking all the steps. This device ensures the locking of the moving steps, in a functional position ( Figure 1A ) or retracted ( figure 2 ) of the staircase 10 (to secure the function ladder in the latter position as will be seen later).

La figure 16A est une vue partielle de l'escalier de l'invention lorsqu'il est en fonction ou déployé, au niveau de la marche pivot supérieure 103. La figure 16B est une vue en coupe selon A-A de l'escalier de la figure 16A, la figure 16C étant une vue de détail de la figure 16B au niveau du mât central. Dans le mode de réalisation décrit, dix marches mobiles 104 à 113 sont intercalées entre la marche pivot supérieure 103 et la marche pivot inférieure 114. Les marches pivot 103 et 114 étant alignées verticalement (elles sont donc séparées d'un angle de 360°), l'angle séparant chaque marche est de 32,73° lorsque l'escalier est déployé (comme illustré figure 16B). On distingue sur les figures 16A et 16B l'agencement des marches 101 à 105 de l'escalier lorsque celui-ci est déployé, l'angle séparant les marches étant donc de 32,73°.The figure 16A is a partial view of the staircase of the invention when it is in operation or deployed, at the level of the upper pivot step 103. The figure 16B is a sectional view along AA of the stairs of the figure 16A , the figure 16C being a detail view of the figure 16B at the central mast. In the embodiment described, ten movable steps 104 to 113 are interposed between the upper pivot step 103 and the lower pivot step 114. The pivot steps 103 and 114 are aligned vertically (they are therefore separated by an angle of 360 °). , the angle between each step is 32.73 ° when the staircase is deployed (as shown figure 16B ). We distinguish on the Figures 16A and 16B the arrangement of the steps 101 to 105 of the staircase when it is deployed, the angle between the steps being 32.73 °.

La figure 17A est une vue partielle de l'escalier de l'invention lorsqu'il est escamoté, au niveau de la marche pivot supérieure 103, les marches 101 à 105 étant dès lors alignées verticalement l'angle séparant les marches est de 0°). La figure 17B est une vue en coupe selon B-B de l'escalier de la figure 17A, la figure 17C étant une vue de détail de la figure 17B au niveau du mât central.The Figure 17A is a partial view of the staircase of the invention when it is retracted, at the upper pivot step 103, the steps 101 to 105 are therefore vertically aligned the angle between the steps is 0 °). The Figure 17B is a sectional view along BB of the stairs of the Figure 17A , the figure 17C being a detail view of the Figure 17B at the central mast.

Des butées angulaires ou ergots 24 ménagées sur les contours supérieurs 41 et inférieurs 42 des manchons-entretoise ou bagues 3 des marches permettent deux positions relatives de chaque marche mobile (figure 10C) et de la marche pivot supérieure (figure 10B), à savoir une position butée en position escalier (figure 1A) et une position butée en escamotage (figure 2). On notera toutefois que la marche pivot inférieure 114 ne comprend pas d'ergot sur son contour supérieur 41 mais seulement sur son contour inférieur 42 (figure 10A).Angular stops or lugs 24 formed on the upper contours 41 and lower 42 of the spacer sleeves or rings 3 of the steps allow two relative positions of each moving step ( Figure 10C ) and the upper pivoting step ( figure 10B ), namely a stop position in staircase position ( Figure 1A ) and a retracted stop position ( figure 2 ). It should be noted, however, that the lower pivoting step 114 does not comprise a lug on its upper contour 41 but only on its lower contour 42 (FIG. figure 10A ).

Dans un souci de clarté, nous ne prendrons en compte que les marches 103 à 114 pour expliquer la cinématique d'escamotage de l'escalier de l'invention.For the sake of clarity, we will take into account only the steps 103 to 114 to explain the retraction kinematics of the staircase of the invention.

Lorsque l'escalier est en fonction, deux marches successives sont espacées entre elles d'un angle de 32,73° (figures 16B et 16C), les marches 103 et 114 étant fixes, et les butées angulaires en position escalier. Lorsque l'utilisateur souhaite ranger ou escamoter l'escalier 10 contre le mur 14, il déverrouille la marche 113 (à l'aide de la manette 15 qui actionne la goupille de blocage correspondante) et tourne la marche 113 d'un angle de 32,73° dans le sens anti-horaire jusqu'à ce que la marche 113 vienne en contact avec la butée de la marche 112 qui est dès lors positionnée au-dessus de (ou alignée verticalement avec) la marche 113 (figures 17B et 17C). Ainsi, en tournant à nouveau la marche 113 de 32,73° dans le sens anti-horaire, celle-ci entraîne la marche 112 jusqu'à ce que la marche 112 vienne en contact avec la butée de la marche 111 qui est dès lors positionnée au-dessus des (ou alignée verticalement avec) les marches 112 et 113.When the staircase is in operation, two successive steps are spaced from each other at an angle of 32.73 ° ( Figures 16B and 16C ), the steps 103 and 114 being fixed, and the angular stops in the staircase position. When the user wishes to store or retract the stair 10 against the wall 14, it unlocks the step 113 (using the lever 15 which actuates the locking pin corresponding) and turns the step 113 by an angle of 32 , 73 ° in the counterclockwise direction until the step 113 comes into contact with the stop of the step 112 which is therefore positioned above (or aligned vertically with) the step 113 ( Figures 17B and 17C ). Thus, by again turning the step 113 32.73 ° in the counterclockwise direction, it causes the step 112 until the step 112 comes into contact with the stop of the step 111 which is then positioned above (or vertically aligned with) steps 112 and 113.

La rotation de la marche 113 est répétée neuf fois (c'est-à-dire que la marche 113 est pivotée de 294,57°) jusqu'à obtenir l'alignement des marches 103 à 114.The rotation of the step 113 is repeated nine times (i.e., the step 113 is rotated 294.57 °) until the steps 103 to 114 are aligned.

On en déduit aisément que cette même opération de rotation des marches est également réalisée pour les ensembles de marches 115 à 119 et 100 à 102.It is easy to deduce that this same operation of rotation of the steps is also performed for the sets of steps 115 to 119 and 100 to 102.

Une fois que toutes les marches 100 à 119 sont alignées verticalement, l'utilisateur peut déplacer en rotation le mât central 2 par rapport au mur (par le biais des deux marches pivot supérieure 103 et inférieure 114) jusqu'à ce que l'ensemble formé par les marches 100 à 119 et le mât 2 soit au voisinage du mur 14 comme illustré sur la figure 2.Once all the steps 100 to 119 are aligned vertically, the user can rotate the central mast 2 relative to the wall (through the two upper pivot 103 and lower 114 steps) until the assembly formed by the steps 100 to 119 and the mast 2 is in the vicinity of the wall 14 as shown in FIG. figure 2 .

Pour déplacer l'escalier de la position escamotée vers la position déployée, on effectue les opérations inverses.To move the stairs from the retracted position to the deployed position, reverse operations are performed.

La figure 10C illustre un exemple d'ossature d'une marche mobile en rotation de l'escalier de l'invention. L'ossature d'une telle marche permet un habillage personnalisé du giron dans un matériau tel que le métal, le bois, le verre ou la pierre par exemple. L'ossature est optimisée pour offrir une masse minimum et une résistance maximum. L'environnement, nez de marche, garde-corps, éclairage sont déterminés en fonction des contraintes de l'environnement et des désirs du client. Comme toutes les marches mobiles en rotation 100 à 102, 104 à 113 et 115 à 119 de l'escalier, l'ossature 30 des marches pivot 103 et 114 est personnalisable et pourra être recouverte par une pièce d'habillage 31 (par vissage par exemple).The Figure 10C illustrates an example of a frame of a moving step in rotation of the staircase of the invention. The framework of such a step allows a custom dressing of the tread in a material such as metal, wood, glass or stone for example. The frame is optimized to provide minimum mass and maximum strength. The environment, stair nosing, railing, lighting are determined according to the constraints of the environment and customer's wishes. Like all the moving steps in rotation 100 to 102, 104 to 113 and 115 to 119 of the staircase, the frame 30 of the pivot steps 103 and 114 is customizable and may be covered by a trim piece 31 (screwed by example).

Comme illustré dans le mode de réalisation particulier de la figure 11, des ouvertures ou découpes de préhension 40 dans les marches pivot et mobiles en rotation permettent d'utiliser l'ensemble comme échelle. Ceci permet, dans la position escamotée de l'escalier, d'aider au transport d'un objet encombrant, sans devoir ajouter une échelle. Ainsi, dans ce mode de réalisation particulier, l'escalier est utilisable dans ses deux positions. Comme mentionné précédemment, le verrouillage de l'escalier en postion escamotée permet de sécuriser la fonction « échelle ».As illustrated in the particular embodiment of the figure 11 , apertures or gripping cutouts 40 in the pivotally movable steps in rotation allow to use the assembly as a ladder. This allows, in the retracted position of the staircase, to help transport a bulky object, without having to add a ladder. Thus, in this particular embodiment, the staircase can be used in its two positions. As mentioned above, the locking of the staircase in retracted position makes it possible to secure the "ladder" function.

Dans une variante, l'escalier 10 pourra être escamoté dans un logement ménagé dans le mur 14 afin de réduire davantage l'encombrement au sol dans cette position.Alternatively, the staircase 10 can be retracted into a housing in the wall 14 to further reduce the footprint in this position.

La figure 5B est une vue en perspective du manchon supérieur 13 qui est destiné à être placé à l'extrémité supérieure du mât central 2 et donc au-dessus du manchon-entretoise 3 de la marche 100. Ce manchon 13 permet ainsi à la plateforme 28 d'être solidarisée au mât central 2 dans le même plan que le plancher 4 et d'être parfaitement plane lorsque l'escalier 10 est en fonction.The Figure 5B is a perspective view of the upper sleeve 13 which is intended to be placed at the upper end of the central mast 2 and thus above the spacer sleeve 3 of the step 100. This sleeve 13 thus allows the platform 28 of be secured to the central mast 2 in the same plane as the floor 4 and to be perfectly flat when the stair 10 is in function.

La forme des girons de marche n'est pas limitée à celle illustrée mais peut prendre, par exemple, la forme d'une section de disque.The shape of the tread steps is not limited to that illustrated but may take the form of a disc section, for example.

Par ailleurs, les garde-corps peuvent ne pas être retiré lorsque l'escalier 10 est escamoté. Dans cette variante, les marches sont de préférence en forme de section de cercle/disque et les pieds de garde corps 9 sont chacun disposés le long de la portion circulaire de la marche associée, à un angle différent du pied de garde corps de la marche suivante et de la précédente, de façon à ce que les gardes corps 5 se juxtaposent de manière compacte lorsque l'escalier est escamoté.In addition, the railings may not be removed when the staircase 10 is retracted. In this variant, the steps are preferably in the form of a section of a circle / disk and the guardrail feet 9 are each arranged along the circular portion of the associated step, at a different angle from the guard foot of the step next and the previous, so that the bodyguards 5 juxtapose compactly when the staircase is retracted.

Les dimensions de l'escalier 10 sont adaptables en fonction du volume disponible, notamment des dimensions (hauteur et largeur) de la trémie 12, la hauteur entre planchers et les faces d'accès de l'escalier.The dimensions of the staircase 10 are adaptable according to the available volume, in particular the dimensions (height and width) of the hopper 12, the height between the floors and the access faces of the staircase.

En fonction des dimensions de l'escalier, le nombre de marches reliées au mur par pivot pourra varier. Dans une variante, le support de gâlet 16 solidaie du mât central 2 pourra être relié au sol par une liaison pivot.Depending on the size of the stairs, the number of steps connected to the wall by pivot may vary. In a variant, the rack support 16 solidaire central mast 2 may be connected to the ground by a pivot connection.

Le mât pourra être fabriqué dans toute autre matériau qui permet d'obtenir la robustesse requise (résistance maximale) avec un encombrement minimum.The mast can be made of any other material that provides the required strength (maximum strength) with a minimum footprint.

On pourra en outre faire varier le nombre de marches selon les besoins.We can also vary the number of steps as needed.

Dans une variante, les marches peuvent s'aligner respectivement à gauche et à droite du mât, ou on pourrait prévoir que, selon les besoins, seules les marches du haut ou du bas sont repliées.Alternatively, the steps may line respectively to the left and right of the mast, or one could predict that, as needed, only the top or bottom steps are folded.

Dans un mode de réalisation particulier, l'escalier pourra être motorisé de façon à ce que les marches et/ou le mât soient déplacés de la position déployée à la position escamotée, et inversement, de manière automatique.In a particular embodiment, the staircase may be motorized so that the steps and / or the mast are moved from the deployed position to the retracted position, and vice versa, automatically.

Claims (7)

  1. A spiral, retractable staircase (10), comprising a central pole (2) intended to be positioned vertically and adapted to support the steps (100, ..., 119), each one extending into a substantially horizontal plane,
    at least one part of the steps (100, ..., 119) being mounted mobile and rotating around a central pole (2), in their respective substantially horizontal planes and at least two of the said steps (100, ..., 119) being fixed to the said pole (2), the said central pole (2) being able to sit in at least two positions:
    - a first position, known as the function position, wherein the said steps (100, ..., 119) are positioned around the said central pole (2);
    - a second position, known as the retracting position, wherein the said steps (100, ..., 119) are aligned vertically,
    characterised in that the said central pole (2) is mobile, while remaining vertical, at least two of the said steps (100, ..., 119) comprising means for connection by a pivot to a wall (14),
  2. A spiral, retractable staircase (10), according to Claim 1, characterised in that the lower edge of the pole (2) includes means for rolling on the ground (6).
  3. A spiral, retractable staircase (10), according to Claim 1 or 2, characterised in that at least one part of the said steps (100, ..., 119) is fitted with a locking device (15).
  4. A spiral, retractable staircase (10), according to any one of Claims 1 to 3, characterised in that the upper edge of the said pole (2), is intended to cooperate, in the first position, with the holding means of the pole (2).
  5. A spiral, retractable staircase (10), according to any one of Claims 1 to 4, characterised in that the said steps (100, ..., 119) include a sleeve (3) intended to be slipped onto the said central pole (2).
  6. A spiral, retractable staircase (10), according to any one of Claims 1 to 4, and according to Claim 5, characterised in that the said sleeve (3) is equipped on its upper face (41) and/or lower face (42) with a blocking spur, rotating on the said step.
  7. A spiral, retractable staircase (10), according to any one of Claims 1 to 6, characterised in that the said steps include at least one gripping area (40).
EP11162459.9A 2010-04-15 2011-04-14 Collapsible spiral staircase Active EP2378025B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1052874A FR2958954A1 (en) 2010-04-15 2010-04-15 Retractable left-hand spiral staircase for use between ground floor and basement of dwelling, has central mast occupying function and retracted positions in which stairs are arranged around mast and are aligned vertically, respectively
FR1053576A FR2958955B1 (en) 2010-04-15 2010-05-07 HELICOIDAL ESCAMOTABLE STAIRCASE

Publications (2)

Publication Number Publication Date
EP2378025A1 EP2378025A1 (en) 2011-10-19
EP2378025B1 true EP2378025B1 (en) 2016-11-02

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EP11162459.9A Active EP2378025B1 (en) 2010-04-15 2011-04-14 Collapsible spiral staircase

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EP (1) EP2378025B1 (en)
FR (1) FR2958955B1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2012387142B2 (en) * 2012-07-31 2017-10-19 Anenda Systems Inc. Stair systems and wall assemblies comprising same
DE202013003089U1 (en) 2013-04-04 2013-04-24 Mark Niehüser Retractable and retractable spiral staircase for opening and closing superimposed projectiles
CN104088413B (en) * 2014-07-23 2016-08-24 宋志伟 A kind of self-service escape stairs of Antiseismic building
CN104533034B (en) * 2014-12-24 2017-05-10 北京凯盛建材工程有限公司 Spiral stair used for building and arrangement method thereof
CN106271409B (en) * 2016-08-21 2018-08-21 中国十九冶集团有限公司南京分公司 A kind of production method around cylinder steel ladder
NL2017412B1 (en) * 2016-09-02 2018-03-09 Verbugt Intellectual Properties B V Staircase device, in particular for a mobile structure
US11466461B1 (en) * 2019-04-27 2022-10-11 Luis Jones Actuatable assemblies
IT202100000842A1 (en) * 2021-01-19 2022-07-19 Federico Zadra RETRACTABLE SPIRAL LADDER

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1231558A (en) * 1959-08-03 1960-09-30 Retractable staircase
FR1459266A (en) * 1965-10-07 1966-04-29 Staircase
FR2921398B1 (en) * 2007-09-25 2012-11-30 Campenon Bernard Regions MODULE FOR THE CONSTRUCTION OF A PROVISIONAL STAIRCASE, STAIRCASE AND METHOD FOR INSTALLING SUCH STAIRS

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FR2958955A1 (en) 2011-10-21
FR2958955B1 (en) 2017-04-28
EP2378025A1 (en) 2011-10-19

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