EP0449091A1 - Staircase well equipment for a folding loft ladder with lateral arms - Google Patents

Staircase well equipment for a folding loft ladder with lateral arms Download PDF

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Publication number
EP0449091A1
EP0449091A1 EP91104298A EP91104298A EP0449091A1 EP 0449091 A1 EP0449091 A1 EP 0449091A1 EP 91104298 A EP91104298 A EP 91104298A EP 91104298 A EP91104298 A EP 91104298A EP 0449091 A1 EP0449091 A1 EP 0449091A1
Authority
EP
European Patent Office
Prior art keywords
staircase
hopper
landing
lateral arms
sliding
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.)
Granted
Application number
EP91104298A
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German (de)
French (fr)
Other versions
EP0449091B1 (en
Inventor
Michel Lavrard
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.)
MACC BRICOLAGE
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MACC BRICOLAGE
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Filing date
Publication date
Application filed by MACC BRICOLAGE filed Critical MACC BRICOLAGE
Publication of EP0449091A1 publication Critical patent/EP0449091A1/en
Application granted granted Critical
Publication of EP0449091B1 publication Critical patent/EP0449091B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

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

Definitions

  • the present invention relates to a hopper equipment for retractable attic staircase, with lateral arms, composed of two landing ramps articulated on the hopper supporting two arms fixed by ball joints at each of their ends.
  • the floor is often fitted with a retractable attic staircase in an existing hopper or to be made.
  • This type of embodiment has indisputable advantages but, because of the presence of the lateral arms, requires a hopper whose width corresponds exactly to the staircase for which it was manufactured and requires the staircase to be well centered in the hopper .
  • the present invention relates to a retractable attic staircase equipment with lateral arms adapting to any width of hopper.
  • the invention solves the problem using equipment consisting of two pivoting ramps on the two scaffolds supporting the staircase which come to bear on the lateral sides of the hopper.
  • Figure 1 shows , in perspective, a staircase installed with the hopper equipment.
  • Figure 2 shows , in perspective, the hopper equipment seen from the upper floor.
  • Figure 3 shows , in section, the sliding arm equipped with its lower and upper ball joint.
  • Figure 4 shows , seen from the side, the hopper equipment for attic stairs with, in section, the upper floor.
  • Figure 5 shows , seen from the front, the hopper equipment in the case of a narrow width hopper.
  • FIG. 6 represents, seen from the front, the hopper equipment in the case of a very wide hopper.
  • FIG. 7 represents, seen from the front, the hopper equipment in the case of an asymmetrical installation of the staircase.
  • Figures 1 and 2 show the hopper equipment composed of two scabbards 4, in the form of a sheath, fixed to the hopper 18 by screws or lag screws 2, having an axis 16 on which the upper part 12 is articulated from the attic staircase.
  • Two landing ramps 1 are fitted at one of their ends in the axis of the sheath and are fixed to the lateral side of the hopper at the other end by a screw or lag screw 3.
  • the other end of the arm 1 comprises a ball joint 5 which is articulated in a cage 9 secured to the upper sliding arm 7.
  • the latter slides in a sheath 17 with the lower arm 8, a cage 10 screwed onto the lower arm 8 and receives a ball joint 6 fixed on the upper section 12 of the attic staircase.
  • the lower cage 10 is fixed by two screws 13 and can be positioned where desired on the lower arm 8 by means of a succession of holes 14. As shown in FIG. 4, a spring-like compensation member 15 connects the section upper 12 to a collar 13 fixed on the upper arm 1.
  • the user will then rotate the two landing ramps along the axis X X 'until the end of the ramp comprising the ball 5 touches the lateral side of the hopper. It then fixes the landing ramp by the screw 3, the lateral sliding arm 7 and 8 limiting the deployment of the staircase will come to articulate on the ball joints 5 and 6, respectively on the hopper and the staircase.
  • This sliding arm will act as a shroud to stiffen the staircase in the low position regardless of the width of the hopper.
  • the embodiment of the sliding arm is cited by way of example and could have consisted of two articulated arms.
  • the collar 13 can be moved on the horizontal part of the landing ramp 1 and thereby modifies the compensation effect of the spring in the closed and open position.

Landscapes

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

Abstract

The equipment is composed of two landing rails 1 which can pivot at one end on two bushes which are fixed to the lateral edges of the stairwell (hatch) and at the other end to the upper section of the ladder by a sliding arm 7 and 8 articulated to each of its ends by two ball joints 5 and 6. <IMAGE>

Description

La présente invention concerne un équipement de trémis pour escalier de grenier escamotable, avec bras latéraux, composé de deux rampes de débarquement articulées sur la trémis supportant deux bras fixés par des rotules à chacune de leur extrémité.The present invention relates to a hopper equipment for retractable attic staircase, with lateral arms, composed of two landing ramps articulated on the hopper supporting two arms fixed by ball joints at each of their ends.

Pour accéder aux combles d'un grenier, on équipe souvent le plancher d'un escalier de grenier escamotable dans une trémie existante ou à réaliser.To access the attic of an attic, the floor is often fitted with a retractable attic staircase in an existing hopper or to be made.

Il existe deux catégories d'escalier pour équiper ces trémies :

  • les escaliers autoporteurs et
  • les escaliers avec caisson.
  • A. les escaliers autoporteurs sont articulés dans leur partie haute sur une ferrure fixée sur un seul côté de la trémie.
    Ces escaliers s'installent qu'elle que soit la largeur de la trémie puisqu'ils ne dépendant pas des côtés latéraux, mais de par leur conception :
    • ils encombrent une partie de la surface du plancher de l'étage supérieur (ex. Brevet FR A 903 608 - Brevet EP - B - 038.428
    • ils nécessitent des montants d'un module d'inertie à la flexion suffisant pour résister au poids de l'utilisateur sur la hauteur totale plancher - plafond.
    • ils nécessitent un système de verrouillage des tronçons lorsqu'ils sont déployés
  • B. les escaliers avec caisson comportent eux des bras latéraux coulissants ou pliants qui supportent souvent un organe de compensation.
    (ex. Brevet DE-C-800 147 et US - A-1 811 708).
    qui limite la course de l'escalier en position dépliée.
There are two categories of stairs to equip these hoppers:
  • self-supporting stairs and
  • stairs with box.
  • A. self-supporting stairs are articulated in their upper part on a fitting fixed on one side of the hopper.
    These stairs are installed whatever the width of the hopper since they do not depend on the lateral sides, but by their design:
    • they clutter up part of the surface of the floor of the upper floor (eg Patent FR A 903 608 - Patent EP - B - 038.428
    • they require amounts of a flexural inertia module sufficient to withstand the weight of the user over the total height from floor to ceiling.
    • they require a section locking system when deployed
  • B. the staircases with box have sliding or folding lateral arms which often support a compensating member.
    (ex. Patent DE-C-800 147 and US - A-1 811 708).
    which limits the travel of the stairs in the unfolded position.

Ces deux bras coulissants ou articulés viennent faire un point d'appui au milieu de l'escalier permettant d'une part, de limiter les risques de casse des montants d'autre part, permettent d'éviter les systèmes de blocage des tronçons les uns sur les autres.These two sliding or articulated arms make a fulcrum in the middle of the staircase allowing on the one hand, to limit the risks of breakage of the uprights on the other hand, make it possible to avoid the blocking systems of the sections on the others.

Ce type d'escalier se replie à l'intérieur de la trémie sans encombrer le plancher à l'étage supérieur.This type of staircase folds inside the hopper without cluttering the floor on the upper floor.

Ce type de réalisation comporte des avantages incontestables mais, nécessite, à cause de la présence des bras latéraux, une trémie dont la largeur correspond exactement à l'escalier pour lequel elle a été fabriquée et oblige l'escalier à être bien centré dans la trémie.This type of embodiment has indisputable advantages but, because of the presence of the lateral arms, requires a hopper whose width corresponds exactly to the staircase for which it was manufactured and requires the staircase to be well centered in the hopper .

Si une solive de la charpente passe au-dessus de la trémie, il est impossible de désaxer l'escalier d'un côté de la trappe.If a joist of the frame passes over the hopper, it is impossible to offset the stairs on one side of the hatch.

La présente invention concerne un équipement pour escalier de grenier escamotable avec bras latéraux s'adaptant à n'importe quelle largeur de trémie. L'invention résoud le problème grâce à un équipement constitué de deux rampes pivotantes sur les deux chappes supportant l'escalier qui viennent prendre appui sur les côtés latéraux de la trémie.The present invention relates to a retractable attic staircase equipment with lateral arms adapting to any width of hopper. The invention solves the problem using equipment consisting of two pivoting ramps on the two scaffolds supporting the staircase which come to bear on the lateral sides of the hopper.

Ces deux rampes sont reliées à la partie inférieure de l'escalier par deux bras coulissants, réglables en longueur et articulés de part et d'autre par des rotules.These two ramps are connected to the lower part of the staircase by two sliding arms, adjustable in length and articulated on both sides by ball joints.

L'invention est exposée ci-après plus en détail à l'aide de dessins représentant seulement un mode d'exécution.The invention is set out below in more detail with the aid of drawings representing only one embodiment.

La figure 1 représente, en perspective, un escalier installé avec l'équipement de trémie. Figure 1 shows , in perspective, a staircase installed with the hopper equipment.

La figure 2 représente, en perspective, l'équipement de trémie vu depuis l'étage supérieur. Figure 2 shows , in perspective, the hopper equipment seen from the upper floor.

La figure 3 représente, en coupe, le bras coulissant équipé de sa rotule inférieure et supérieure. Figure 3 shows , in section, the sliding arm equipped with its lower and upper ball joint.

La figure 4 représente, vu de côté, l'équipement de trémie pour escalier de grenier avec, en coupe, le plancher supérieur. Figure 4 shows , seen from the side, the hopper equipment for attic stairs with, in section, the upper floor.

La figure 5 représente, vu de face, l'équipement de trémis dans le cas d'une trémie de faible largeur. Figure 5 shows , seen from the front, the hopper equipment in the case of a narrow width hopper.

La figure 6 représente, vu de face, l'équipement de trémis dans le cas d'une trémie de grande largeur. FIG. 6 represents, seen from the front, the hopper equipment in the case of a very wide hopper.

La figure 7 représente, vu de face, l'équipement de trémie dans le cas d'une installation de l'escalier de façon dissymétrique. FIG. 7 represents, seen from the front, the hopper equipment in the case of an asymmetrical installation of the staircase.

Les figures 1 et 2 représentent l'équipement de trémis composé de deux chappes 4, en forme de fourreau, fixées sur la trémie 18 par des vis ou tire-fonds 2, possédant un axe 16 sur lequel vient s'articuler la partie supérieure 12 de l'escalier de grenier. Deux rampes de débarquement 1 viennent s'emmancher à l'une de leur extrémité dans l'axe du fourreau et sont fixées sur le côté latéral de la trémie à l'autre extrémité par une vis ou tire-fonds 3.Figures 1 and 2 show the hopper equipment composed of two scabbards 4, in the form of a sheath, fixed to the hopper 18 by screws or lag screws 2, having an axis 16 on which the upper part 12 is articulated from the attic staircase. Two landing ramps 1 are fitted at one of their ends in the axis of the sheath and are fixed to the lateral side of the hopper at the other end by a screw or lag screw 3.

Comme représenté sur la figure 3, l'autre extrémité du bras 1 comporte une rotule 5 qui vient s'articuler dans une cage 9 solidaire du bras coulissant supérieur 7.As shown in FIG. 3, the other end of the arm 1 comprises a ball joint 5 which is articulated in a cage 9 secured to the upper sliding arm 7.

Ce dernier coulisse dans un fourreau 17 avec le bras inférieur 8, une cage 10 vissée sur le bras inférieur 8 et vient recevoir une rotule 6 fixée sur le tronçon supérieur 12 de l'escalier de grenier.The latter slides in a sheath 17 with the lower arm 8, a cage 10 screwed onto the lower arm 8 and receives a ball joint 6 fixed on the upper section 12 of the attic staircase.

La cage inférieure 10 est fixée par deux vis 13 et peut être positionnée où l'on désire sur le bras inférieur 8 grâce à une succession de trous 14. Comme représenté sur la figure 4, un organe de compensation 15 du genre ressort relie le tronçon supérieur 12 à un collier 13 fixé sur le bras supérieur 1.The lower cage 10 is fixed by two screws 13 and can be positioned where desired on the lower arm 8 by means of a succession of holes 14. As shown in FIG. 4, a spring-like compensation member 15 connects the section upper 12 to a collar 13 fixed on the upper arm 1.

Comme sur la figure 5, pour installer un escalier de grenier grâce à un tel équipement il suffit de fixer les deux chappes 4 sur la trémie à l'endroit désiré par l'utilisateur.As in FIG. 5, to install an attic staircase using such equipment, it suffices to fix the two scoops 4 on the hopper at the location desired by the user.

L'utilisateur fera ensuite pivoter les deux rampes de débarquement selon l'axe X X' jusqu'à ce que l'extrémité de la rampe comportant la rotule 5 touche le côté latéral de la trémie. Il fixe alors la rampe de débarquement par la vis 3,le bras coulissant latéral 7 et 8 limitant le déploiement de l'escalier viendra s'articuler sur les rotules 5 et 6, respectivement sur la trémie et l'escalier.The user will then rotate the two landing ramps along the axis X X 'until the end of the ramp comprising the ball 5 touches the lateral side of the hopper. It then fixes the landing ramp by the screw 3, the lateral sliding arm 7 and 8 limiting the deployment of the staircase will come to articulate on the ball joints 5 and 6, respectively on the hopper and the staircase.

Ce bras coulissant fera office de hauban pour rigidifier l'escalier en position basse qu'elle que soit la largeur de la trémie.This sliding arm will act as a shroud to stiffen the staircase in the low position regardless of the width of the hopper.

Si comme dans la figure 7 une solive de la charpente oblige l'utilisateur à désaxer l'escalier d'un côté de la trémie. Il sera alors nécessaire de procéder aux réglages de deux bras coulissants faisant office de hauban en fixant la cage 10 avec les vis 13 dans le trou 14 correspondant à la longueur nécessaire pour une bonne stabilité.If as in Figure 7 a joist of the frame requires the user to offset the stairs to one side of the hopper. It will then be necessary to carry out the adjustments of two sliding arms acting as a shroud by fixing the cage 10 with the screws 13 in the hole 14 corresponding to the length necessary for good stability.

Le mode de réalisation du bras coulissant est cité à titre d'exemple et aurait pu être constitué de deux bras articulés.The embodiment of the sliding arm is cited by way of example and could have consisted of two articulated arms.

Le collier 13 peut être déplacé sur la partie horizontale de la rampe de débarquement 1 et modifie par là même l'effet de compensation du ressort en position fermée et ouverteThe collar 13 can be moved on the horizontal part of the landing ramp 1 and thereby modifies the compensation effect of the spring in the closed and open position.

Claims (2)

Equipement de trémie pour escalier de grenier escamotable constitué de manière connue en soit par deux rampes de débarquement fixe et par deux bras latéraux coulissants ou pliants, caractérisé en ce que d'une part une extrémité des rampes de débarquement est pivotante dans le fourreau constitutif des chappes permettant d'articuler le tronçon supérieur de l'escalier à la trémie et, d'autre part, en ce que leur autre extrémité est reliée à la partie inférieure de l'escalier par un bras coulissant ou pliant, articulé respectivement sur la rampe de débarquement et l'escalier de grenier par deux rotules.Hopper equipment for retractable attic staircase constituted in known manner by either two fixed landing ramps and by two sliding or folding lateral arms, characterized in that on the one hand one end of the landing ramps is pivotable in the sheath constituting the chaps making it possible to articulate the upper section of the staircase to the hopper and, on the other hand, in that their other end is connected to the lower part of the staircase by a sliding or folding arm, articulated respectively on the ramp landing and the attic staircase by two ball joints. Equipement de trémie selon la revendication 1 caractérisé en ce que l'organe de compensation est accroché sur un collier coulissant sur la partie horizontale de la rampe de débarquement.Hopper equipment according to claim 1 characterized in that the compensation member is hung on a sliding collar on the horizontal part of the landing ramp.
EP19910104298 1990-03-26 1991-03-20 Staircase well equipment for a folding loft ladder with lateral arms Expired - Lifetime EP0449091B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9003996 1990-03-26
FR9003996A FR2660002B1 (en) 1990-03-26 1990-03-26 HOPPER EQUIPMENT FOR RETRACTABLE ATTIC STAIRS WITH SIDE ARMS.

Publications (2)

Publication Number Publication Date
EP0449091A1 true EP0449091A1 (en) 1991-10-02
EP0449091B1 EP0449091B1 (en) 1993-09-22

Family

ID=9395228

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910104298 Expired - Lifetime EP0449091B1 (en) 1990-03-26 1991-03-20 Staircase well equipment for a folding loft ladder with lateral arms

Country Status (4)

Country Link
EP (1) EP0449091B1 (en)
DE (1) DE69100386T2 (en)
ES (1) ES2046810T3 (en)
FR (1) FR2660002B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110232201A1 (en) * 2010-03-27 2011-09-29 Michael Cardwell Automatic Retractable Hatch Guard

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE936062C (en) * 1953-02-20 1955-12-01 Saegewerk Retractable two-part attic stairs
DE1684096A1 (en) * 1967-09-09 1970-05-06 Johann Wagner Retractable attic stairs with articulated scissors
FR2126843A5 (en) * 1971-02-10 1972-10-06 Frank Gmbh Wilh

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE936062C (en) * 1953-02-20 1955-12-01 Saegewerk Retractable two-part attic stairs
DE1684096A1 (en) * 1967-09-09 1970-05-06 Johann Wagner Retractable attic stairs with articulated scissors
FR2126843A5 (en) * 1971-02-10 1972-10-06 Frank Gmbh Wilh

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110232201A1 (en) * 2010-03-27 2011-09-29 Michael Cardwell Automatic Retractable Hatch Guard
US8555555B2 (en) * 2010-03-27 2013-10-15 Michael Cardwell Automatic retractable hatch guard

Also Published As

Publication number Publication date
ES2046810T3 (en) 1994-02-01
FR2660002B1 (en) 1992-06-12
DE69100386T2 (en) 1994-05-05
EP0449091B1 (en) 1993-09-22
FR2660002A1 (en) 1991-09-27
DE69100386D1 (en) 1993-10-28

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