CH198072A - Folding staircase. - Google Patents

Folding staircase.

Info

Publication number
CH198072A
CH198072A CH198072DA CH198072A CH 198072 A CH198072 A CH 198072A CH 198072D A CH198072D A CH 198072DA CH 198072 A CH198072 A CH 198072A
Authority
CH
Switzerland
Prior art keywords
staircase
shears
closed
sub
weight
Prior art date
Application number
Other languages
French (fr)
Inventor
F C Marazzi
Original Assignee
F & C Marazzi
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by F & C Marazzi filed Critical F & C Marazzi
Publication of CH198072A publication Critical patent/CH198072A/en

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E06DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06BFIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B5/00Doors, windows, or like closures for special purposes; Border constructions therefor
    • E06B5/01Trap-doors
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04FFINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F11/00Stairways, ramps, or like structures; Balustrades; Handrails
    • E04F11/02Stairways; Layouts thereof
    • E04F11/04Movable stairways, e.g. of loft ladders which may or may not be concealable or extensible
    • E04F11/06Movable stairways, e.g. of loft ladders which may or may not be concealable or extensible collapsible, e.g. folding, telescopic
    • E04F11/062Movable stairways, e.g. of loft ladders which may or may not be concealable or extensible collapsible, e.g. folding, telescopic folding
    • E04F11/066Movable stairways, e.g. of loft ladders which may or may not be concealable or extensible collapsible, e.g. folding, telescopic folding folding like scissors or accordions

Landscapes

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

Description

  

  Escalier repliable.    L'objet de l'invention est un escalier     re-          pliable    pour galetas, comprenant deux ci  sailles à éléments multiples portant entre  elles les marches d'escalier; les deux cisailles  sont reliées ensemble par les marches, les  extrémités des cisailles étant fixées d'une  part par un dispositif de commande au pla  fond d'un local c'est-à-dire sous le plancher  du galetas auquel on veut avoir accès, d'autre  part à des organes de traction permettant  d'ouvrir ou de fermer l'escalier.  



  Le dessin ci-annexé représente, à titre  d'exemple, une forme d'exécution de l'objet  de l'invention.  



  La     fig.    1 montre en coupe vue de coté  l'escalier fermé ou ouvert;  La     fig.    2 en montre une vue en plan.  L'escalier 1 comporte deux cisailles à élé  ments multiples 2, munies entre elles de sup  ports pour recevoir les marches d'escalier.  Les deux cisailles sont reliées ensemble par  les marches. Les extrémités des cisailles de  l'escalier sont fixées, d'une part, au plafond  d'un local c'est-à-dire sous le plancher du    galetas devant être rendu accessible; d'autre  part, elles sont reliées par des organes de  traction 5, par exemple, des câbles, guidés  sur des galets 6, fixés au plancher, et atta  chés à un rouleau d'enroulement à ressorts 7,  monté dans le plafond.

   Les ressorts sont dis  posés de façon que leur action sur les câbles 5  compense au moins en parties le poids de  l'escalier. Le rouleau 7 porte deux parties  extrêmes 8 d'un diamètre, plus grand que  celui de sa partie centrale, facilitant le ma  niement de l'escalier. Sur ces parties de plus  grand diamètre sont attachés les câbles, qui  sont enroulés si l'escalier est fermé, et dé  roulés si l'escalier est ouvert. La partie cen  trale de plus petit diamètre a pour but de  renforcer l'action des ressorts au moment  où ils sont .détendus. L'escalier est fixé par  sa partie supérieure dans le plancher du ga  letas, dont l'ouverture doit être     suffisante     pour y loger l'escalier fermé. Pour fermer ou  ouvrir cette ouverture on a prévu un cou  vercle- supérieur 9 et un couvercle inférieur 10.

    Le couvercle supérieur 9 est fixé au cadre 11      de l'ouverture par une charnière 12, le cou  vercle inférieur 10 par une charnière 13 à  une traverse 14, maintenant en même temps  le rouleau 7. Les deux couvercles 9 et 10  sont reliés par des bielles 15 et 16 et un  levier à deux bras 17, ayant un axe d'oscil  lation 18, fixé dans le cadre de l'ouverture.  Les deux couvercles s'équilibrent sensiblement  ce qui permet de les maintenir dans une  position quelconque, et aussi dans la Posi  tion fermée. Le couvercle inférieur est muni  d'un arrêt permettant que l'escalier, dans sa  position ouverte, repose sur ce couvercle don  nant ainsi plus de rigidité à l'escalier.



  Folding staircase. The object of the invention is a folding staircase for garrets, comprising two protrusions with multiple elements carrying between them the staircase steps; the two shears are connected together by the steps, the ends of the shears being fixed on the one hand by a control device to the ceiling of a room that is to say under the floor of the garret to which you want to have access, on the other hand to traction members allowing the staircase to be opened or closed.



  The accompanying drawing represents, by way of example, an embodiment of the object of the invention.



  Fig. 1 shows a side view of the closed or open staircase; Fig. 2 shows a plan view. The staircase 1 comprises two multi-element snips 2, provided between them with supports for receiving the staircase steps. The two shears are connected together by the steps. The ends of the stair shears are fixed, on the one hand, to the ceiling of a room, that is to say under the garret floor to be made accessible; on the other hand, they are connected by traction members 5, for example cables, guided on rollers 6, fixed to the floor, and attached to a winding roller with springs 7, mounted in the ceiling.

   The springs are arranged so that their action on the cables 5 at least partly compensates for the weight of the stairs. The roller 7 carries two end parts 8 with a diameter greater than that of its central part, facilitating the management of the stairs. On these larger diameter parts are attached the cables, which are rolled up if the staircase is closed, and unrolled if the staircase is open. The purpose of the central part of the smaller diameter is to reinforce the action of the springs when they are relaxed. The staircase is fixed by its upper part in the floor of the ga letas, the opening of which must be sufficient to accommodate the closed staircase. To close or open this opening, an upper cover 9 and a lower cover 10 are provided.

    The upper cover 9 is fixed to the frame 11 of the opening by a hinge 12, the lower cover 10 by a hinge 13 to a cross member 14, simultaneously holding the roller 7. The two covers 9 and 10 are connected by connecting rods 15 and 16 and a lever with two arms 17, having an axis of oscillation 18, fixed in the frame of the opening. The two covers are substantially balanced, which allows them to be kept in any position, and also in the closed position. The lower cover is provided with a stop allowing the staircase, in its open position, to rest on this cover, thus giving more rigidity to the staircase.

 

Claims (1)

REVENDICATION Escalier repliable, caractérisé en ce qu'i comprend deux cisailles à éléments multiplesl portant entre elles les marches d'escalier, les deux cisailles étant reliées ensemble par ces marches, les extrémités des cisailles étant fixées, d'une part, par un dispositif de com mande au plafond d'un local c'est-à-dire sous le plancher du galetas auquel on veut avoir accès, d'autre part à des organes de traction permettant d'ouvrir ou de fermer l'escalier. SOUS-REVENDICATIONS: 1 Escalier d'après la revendication, caracté risé en ce que le dispositif de commande comporte un rouleau à ressorts enroulés compensant au moins en partie le poids de l'escalier. CLAIM Folding staircase, characterized in that it comprises two multi-element shears carrying the staircase steps between them, the two shears being connected together by these steps, the ends of the shears being fixed, on the one hand, by a device control unit on the ceiling of a room, that is to say under the garret floor to which one wishes to have access, on the other hand to traction members making it possible to open or close the staircase. SUB-CLAIMS: 1 Staircase according to claim, characterized in that the control device comprises a roller with wound springs at least partially compensating for the weight of the staircase. 2 Escalier d'après la revendication et la sous-revendication 1, caractérisé en ce que le rouleau à ressorts présente deux par ties de diamètres différents, la partie de petit diamètre servant à renforcer l'action des ressorts au moment où ils sont dé tendus. 3 Escalier d'après la revendication et les sous-revendications 1 et 2, caractérisé en ce que l'ouverture pour l'escalier dans le plafond est fermée par deux couvercles, un dispositif de leviers équilibrant le poids du couvercle inférieur par le poids du couvercle supérieur, si l'escalier est ou vert et retenant le couvercle inférieur en position fermée si l'escalier est fermé. 2 Staircase according to claim and sub-claim 1, characterized in that the spring roller has two parts of different diameters, the small diameter part serving to reinforce the action of the springs when they are tensioned . 3 Staircase according to claim and sub-claims 1 and 2, characterized in that the opening for the staircase in the ceiling is closed by two covers, a device of levers balancing the weight of the lower cover by the weight of the upper cover, if the staircase is or green and retaining the lower cover in the closed position if the staircase is closed.
CH198072D 1936-12-03 1936-12-03 Folding staircase. CH198072A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH198072T 1936-12-03

Publications (1)

Publication Number Publication Date
CH198072A true CH198072A (en) 1938-06-15

Family

ID=4441158

Family Applications (1)

Application Number Title Priority Date Filing Date
CH198072D CH198072A (en) 1936-12-03 1936-12-03 Folding staircase.

Country Status (1)

Country Link
CH (1) CH198072A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1136091B (en) * 1956-10-23 1962-09-06 Johann Wagner Retractable attic stairs with articulated scissors
US3768593A (en) * 1971-03-15 1973-10-30 H Naka Indoor escape device
DE2605596A1 (en) * 1975-02-14 1976-08-26 Monnerie Gerard DEVICE FOR UNFOLDING AND FOLDING A RETRACTABLE STAIR
ES2474315R1 (en) * 2013-01-08 2015-02-24 Vasco Aragonesa De Restauraciones Termicas, S.L. PERFECTED STRUCTURE OF ACCESS SYSTEM FOR RESCUE AND / OR MAINTENANCE IN LIFTING EQUIPMENT FACILITIES WITHOUT ACCESS TO COMMON ELEMENTS
US11293226B2 (en) * 2018-01-23 2022-04-05 Joseph O. Rogers, III Safety roof hatch system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1136091B (en) * 1956-10-23 1962-09-06 Johann Wagner Retractable attic stairs with articulated scissors
US3768593A (en) * 1971-03-15 1973-10-30 H Naka Indoor escape device
DE2605596A1 (en) * 1975-02-14 1976-08-26 Monnerie Gerard DEVICE FOR UNFOLDING AND FOLDING A RETRACTABLE STAIR
ES2474315R1 (en) * 2013-01-08 2015-02-24 Vasco Aragonesa De Restauraciones Termicas, S.L. PERFECTED STRUCTURE OF ACCESS SYSTEM FOR RESCUE AND / OR MAINTENANCE IN LIFTING EQUIPMENT FACILITIES WITHOUT ACCESS TO COMMON ELEMENTS
US11293226B2 (en) * 2018-01-23 2022-04-05 Joseph O. Rogers, III Safety roof hatch system

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